fix: hardcode map scale to CLOSEST instead of NORMAL (#632)

Bumps [com.google.guava:guava](https://github.com/google/guava) from 33.4.8-jre to 33.5.0-jre.
- [Release notes](https://github.com/google/guava/releases)
- [Commits](https://github.com/google/guava/commits)

---
updated-dependencies:
- dependency-name: com.google.guava:guava
  dependency-version: 33.5.0-jre
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/dependabot.yml

@@ -0,0 +1,22 @@
+# Dependabot configuration file for GitHub
+
+version: 2
+updates:
+  # CI workflow action updates
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "ci"
+
+  # Gradle package updates
+  - package-ecosystem: "gradle"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "deps"
+    ignore:
+      - dependency-name: 'org.spigotmc:spigot-api'
+      - dependency-name: 'org.papermc:paper-api'

.github/funding.yml

@@ -0,0 +1,4 @@
+# Funding metadata for GitHub
+
+github: WiIIiam278
+custom: https://buymeacoff.ee/william278

.github/workflows/ci.yml

@@ -0,0 +1,96 @@
+name: CI Tests & Publish
+
+on:
+  push:
+    branches: [ 'master' ]
+    paths-ignore:
+      - 'docs/**'
+      - 'workflows/**'
+      - 'README.md'
+
+permissions:
+  contents: read
+  checks: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout for CI 🛎️'
+        uses: actions/checkout@v6
+      - name: 'Set up JDK 21 📦'
+        uses: actions/setup-java@v5
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+      - name: 'Build with Gradle 🏗️'
+        uses: gradle/gradle-build-action@v3
+        with:
+          arguments: build test publish
+        env:
+          SNAPSHOTS_MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
+          SNAPSHOTS_MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
+      - name: 'Publish Test Report 📊'
+        uses: mikepenz/action-junit-report@v6
+        if: success() || failure() # Continue on failure
+        with:
+          report_paths: '**/build/test-results/test/TEST-*.xml'
+      - name: 'Fetch Version Name 📝'
+        run: |
+          echo "::set-output name=VERSION_NAME::$(${{github.workspace}}/gradlew properties --no-daemon --console=plain -q | grep "^version:" | awk '{printf $2}')"
+        id: fetch-version
+      - name: Get Version
+        run: |
+          echo "version_name=${{steps.fetch-version.outputs.VERSION_NAME}}" >> $GITHUB_ENV
+      - name: 'Publish to William278.net 🚀'
+        uses: WiIIiam278/bones-publish-action@v1
+        with:
+          api-key: ${{ secrets.BONES_API_KEY }}
+          project: 'husksync'
+          channel: 'alpha'
+          version: ${{ env.version_name }}
+          changelog: ${{ github.event.head_commit.message }}
+          distro-names: |
+            paper-1.21.1
+            paper-1.21.4
+            paper-1.21.5
+            paper-1.21.8
+            paper-1.21.10
+            paper-1.21.11
+            fabric-1.21.1
+            fabric-1.21.4
+            fabric-1.21.5
+            fabric-1.21.8
+          distro-groups: |
+            paper
+            paper
+            paper
+            paper
+            paper
+            paper
+            fabric
+            fabric
+            fabric
+            fabric
+          distro-descriptions: |
+            Paper 1.21.1
+            Paper 1.21.4
+            Paper 1.21.5
+            Paper 1.21.8
+            Paper 1.21.10
+            Paper 1.21.11
+            Fabric 1.21.1
+            Fabric 1.21.4
+            Fabric 1.21.5
+            Fabric 1.21.8
+          files: |
+            target/HuskSync-Bukkit-${{ env.version_name }}+mc.1.21.1.jar
+            target/HuskSync-Bukkit-${{ env.version_name }}+mc.1.21.4.jar
+            target/HuskSync-Bukkit-${{ env.version_name }}+mc.1.21.5.jar
+            target/HuskSync-Bukkit-${{ env.version_name }}+mc.1.21.8.jar
+            target/HuskSync-Bukkit-${{ env.version_name }}+mc.1.21.10.jar
+            target/HuskSync-Bukkit-${{ env.version_name }}+mc.1.21.11.jar
+            target/HuskSync-Fabric-${{ env.version_name }}+mc.1.21.1.jar
+            target/HuskSync-Fabric-${{ env.version_name }}+mc.1.21.4.jar
+            target/HuskSync-Fabric-${{ env.version_name }}+mc.1.21.5.jar
+            target/HuskSync-Fabric-${{ env.version_name }}+mc.1.21.8.jar

.github/workflows/java_ci.yml

@@ -1,32 +0,0 @@
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
-# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
-
-name: Java CI
-
-on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - name: Set up JDK 16
-      uses: actions/setup-java@v3
-      with:
-        java-version: '16'
-        distribution: 'temurin'
-    - name: Build with Gradle
-      uses: gradle/gradle-build-action@67421db6bd0bf253fb4bd25b31ebb98943c375e1
-      with:
-        arguments: test

.github/workflows/pr_tests.yml

@@ -0,0 +1,30 @@
+name: PR Tests
+
+on:
+  pull_request:
+    branches: [ 'master' ]
+
+permissions:
+  contents: read
+  checks: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout for CI 🛎'
+        uses: actions/checkout@v6
+      - name: 'Set up JDK 21 📦'
+        uses: actions/setup-java@v5
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+      - name: 'Build with Gradle 🏗️'
+        uses: gradle/gradle-build-action@v3
+        with:
+          arguments: test
+      - name: 'Publish Test Report 📊'
+        uses: mikepenz/action-junit-report@v6
+        if: success() || failure() # Continue on failure
+        with:
+          report_paths: '**/build/test-results/test/TEST-*.xml'

.github/workflows/release.yml

@@ -0,0 +1,81 @@
+name: Release Tests & Publish
+
+on:
+  release:
+    types: [ 'published' ]
+
+permissions:
+  contents: read
+  checks: write
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout for CI 🛎️'
+        uses: actions/checkout@v6
+      - name: 'Set up JDK 21 📦'
+        uses: actions/setup-java@v5
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+      - name: 'Build with Gradle 🏗️'
+        uses: gradle/gradle-build-action@v3
+        with:
+          arguments: build test publish
+        env:
+          RELEASES_MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
+          RELEASES_MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
+      - name: 'Publish Test Report 📊'
+        uses: mikepenz/action-junit-report@v6
+        if: success() || failure() # Continue on failure
+        with:
+          report_paths: '**/build/test-results/test/TEST-*.xml'
+      - name: 'Publish to William278.net 🚀'
+        uses: WiIIiam278/bones-publish-action@v1
+        with:
+          api-key: ${{ secrets.BONES_API_KEY }}
+          project: 'husksync'
+          channel: 'release'
+          version: ${{ github.event.release.tag_name }}
+          changelog: ${{ github.event.release.body }}
+          distro-names: |
+            paper-1.21.1
+            paper-1.21.4
+            paper-1.21.5
+            paper-1.21.8
+            paper-1.21.10
+            fabric-1.21.1
+            fabric-1.21.4
+            fabric-1.21.5
+            fabric-1.21.8
+          distro-groups: |
+            paper
+            paper
+            paper
+            paper
+            paper
+            fabric
+            fabric
+            fabric
+            fabric
+          distro-descriptions: |
+            Paper 1.21.1
+            Paper 1.21.4
+            Paper 1.21.5
+            Paper 1.21.8
+            Paper 1.21.10
+            Fabric 1.21.1
+            Fabric 1.21.4
+            Fabric 1.21.5
+            Fabric 1.21.8
+          files: |
+            target/HuskSync-Bukkit-${{ github.event.release.tag_name }}+mc.1.21.1.jar
+            target/HuskSync-Bukkit-${{ github.event.release.tag_name }}+mc.1.21.4.jar
+            target/HuskSync-Bukkit-${{ github.event.release.tag_name }}+mc.1.21.5.jar
+            target/HuskSync-Bukkit-${{ github.event.release.tag_name }}+mc.1.21.8.jar
+            target/HuskSync-Bukkit-${{ github.event.release.tag_name }}+mc.1.21.10.jar
+            target/HuskSync-Fabric-${{ github.event.release.tag_name }}+mc.1.21.1.jar
+            target/HuskSync-Fabric-${{ github.event.release.tag_name }}+mc.1.21.4.jar
+            target/HuskSync-Fabric-${{ github.event.release.tag_name }}+mc.1.21.5.jar
+            target/HuskSync-Fabric-${{ github.event.release.tag_name }}+mc.1.21.8.jar

.github/workflows/update_docs.yml

@@ -0,0 +1,25 @@
+name: Update Docs
+
+on:
+  push:
+    branches: [ 'master' ]
+    paths:
+      - 'docs/**'
+      - 'workflows/**'
+    tags-ignore:
+      - '*'
+
+permissions:
+  contents: write
+
+jobs:
+  update-docs:
+    name: 'Update Docs'
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout for CI 🛎️'
+        uses: actions/checkout@v6
+      - name: 'Push Docs to Github Wiki 📄️'
+        uses: Andrew-Chen-Wang/github-wiki-action@v5
+        with:
+          path: 'docs'

.gitignore

@@ -118,3 +118,7 @@ run/
 !gradle-wrapper.jar
 /build-output-final/
 /target/
+
+# Don't include generated test suite files
+/test/servers/
+/test/HuskSync

.scripts/ensure-java-16

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-JV=$(java -version 2>&1 >/dev/null | head -1)
-echo "$JV" | sed -E 's/^.*version "([^".]*)\.[^"]*".*$/\1/'
-
-if [ "$JV" != 16 ]; then
-	case "$1" in
-	install)
-		echo "installing sdkman..."
-		curl -s "https://get.sdkman.io" | bash
-		source ~/.sdkman/bin/sdkman-init.sh
-		sdk install java 16.0.1-open
-		;;
-	use)
-		echo "must source ~/.sdkman/bin/sdkman-init.sh"
-		exit 1
-		;;
-	esac
-fi

HEADER

@@ -0,0 +1,16 @@
+This file is part of HuskSync, licensed under the Apache License 2.0.
+
+ Copyright (c) William278 <will27528@gmail.com>
+ Copyright (c) contributors
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.

LICENSE

@@ -1,21 +1,202 @@
-Copyright © William278 2022. All rights reserved
 
-LICENSE
-This source code is provided as reference to licensed individuals that have purchased the HuskSync
-plugin once from any of the official sources it is provided. The availability of this code does 
-not grant you the rights to modify, re-distribute, compile or redistribute this source code or 
-"plugin" outside this intended purpose. This license does not cover libraries developed by third
-parties that are utilised in the plugin.
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
 
-CONTRIBUTOR AGREEMENT
-By contributing code to this repository, contributors agree that they forfeit their contributions
-to the copyright holder and only the copyright holder.
-In exchange for contributing, the copyright holder may give, at their discretion, permission to use
-the plugin in commercial contexts
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 
-DEFINITIONS
-"plugin"; the jar file compiled from this source code
-"source code"; the java source code and gradle configurations provided in this repository, however
-excludes libraries
-"copyright holder"; William278
-"contributor(s)"; person(s) who submit (contribute) code through a pull request to this repository
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
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+
+      "Legal Entity" shall mean the union of the acting entity and all
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+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -1,61 +1,112 @@
-# [![HuskSync Banner](images/banner-graphic.png)](https://github.com/WiIIiam278/HuskSync)
-![Github Actions](https://github.com/WiIIiam278/HuskSync/workflows/Java%20CI/badge.svg)
-[![Discord](https://img.shields.io/discord/818135932103557162?color=7289da&logo=discord)](https://discord.gg/tVYhJfyDWG)
+<!--suppress ALL -->
+<p align="center">
+    <img src="images/banner.png" alt="HuskSync" />
+    <a href="https://github.com/WiIIiam278/HuskSync/actions/workflows/ci.yml">
+        <img src="https://img.shields.io/github/actions/workflow/status/WiIIiam278/HuskSync/ci.yml?branch=master&logo=github"/>
+    </a>
+    <a href="https://repo.william278.net/#/releases/net/william278/husksync/">
+        <img src="https://repo.william278.net/api/badge/latest/releases/net/william278/husksync/husksync-common?color=00fb9a&name=Maven&prefix=v" />
+    </a>
+    <a href="https://discord.gg/tVYhJfyDWG">
+        <img src="https://img.shields.io/discord/818135932103557162.svg?label=&logo=discord&logoColor=fff&color=7389D8&labelColor=6A7EC2" />
+    </a> 
+    <br/>
+    <b>
+        <a href="https://www.spigotmc.org/resources/husksync.97144/">Spigot</a>
+    </b> —
+    <b>
+        <a href="https://william278.net/docs/husksync/setup">Setup</a>
+    </b> — 
+    <b>
+        <a href="https://william278.net/docs/husksync/">Docs</a>
+    </b> — 
+    <b>
+        <a href="https://github.com/WiIIiam278/HuskSync/issues">Issues</a>
+    </b>
+</p>
+<br/>
 
-[Documentation, Guides & API](https://william278.net/docs/husksync/Home) · [Resource Page](https://www.spigotmc.org/resources/husksync.97144/) · [Bug Reports](https://github.com/WiIIiam278/HuskSync/issues)
-
-**HuskSync** is a modern, cross-server player data synchronisation system that enables the comprehensive synchronisation of your user's data across multiple proxied servers. It does this by making use of Redis and MySQL to optimally cache data while players change servers.
+**HuskSync** is a modern, cross-server player data synchronization system that enables the comprehensive synchronization of your user's data across multiple proxied servers. It does this by making use of Redis and a MySQL/Mongo/PostgreSQL to optimally cache data while players change servers.
 
 ## Features
-- Synchronise inventories, ender chests, advancements, statistics, experience points, health, max health, hunger, saturation, potion effects, persistent data container tags, game mode, location and more across multiple proxied servers. 
-- Create and manage "snapshot" backups of user data and roll back users to previous states on-the-fly. (`/userdata`)
-- Preview, list, delete, restore & pin user data snapshots in-game with an intuitive menu.
-- Examine the contents of player's inventories and ender chests on-the-fly. (`/inventory`, `/enderchest`)
-- Hooks with your [Player Analytics](https://github.com/plan-player-analytics/Plan) web panel to provide an overview of user data.
-- Supports segregating synchronisation across multiple distinct clusters on one network.
+**⭐ Seamless synchronization** &mdash; Utilises optimised Redis caching when players change server to sync player data super quickly for a seamless experience.
 
-## Requirements
-* A MySQL Database (v8.0+)
-* A Redis Database (v5.0+)
-* Any number of proxied Spigot servers (Minecraft v1.16.5+)
+**⭐ Complete player synchronization** &mdash; Sync inventories, Ender Chests, health, hunger, effects, advancements, statistics, locked maps & [more](https://william278.net/docs/husksync/sync-features)—no data left behind!
+
+**⭐ Backup, restore & rotate** &mdash; Something gone wrong? Restore players back to a previous data state. Rotate and manage data snapshots in-game!
+
+**⭐ Import existing data** &mdash; Import your MySQLPlayerDataBridge data—or from your existing world data! No server reset needed!
+
+**⭐ Works great with Plan** &mdash; Stay in touch with your community through HuskSync analytics on your Plan web panel.
+
+**⭐ Extensible API & open-source** &mdash; Need more? Extend the plugin with the Developer API. Or, submit a pull request through our code bounty system!
+
+**Ready?** [It's syncing time!](https://william278.net/docs/husksync/setup)
+
+## Compatibility
+HuskSync supports the following [compatible versions](https://william278.net/docs/husksync/compatibility) of Minecraft. Since v3.7, you must download the correct version of HuskSync for your server:
+
+|    Minecraft    | Latest HuskSync | Java Version | Platforms     | Support Status                |
+|:---------------:|:---------------:|:------------:|:--------------|:------------------------------|
+|     1.21.10     |    _latest_     |      21      | Paper         | ✅ **Active Release**          |
+|    1.21.7/8     |    _latest_     |      21      | Paper, Fabric | ✅ **August 2026**             |
+|     1.21.6      |      3.8.5      |      21      | Paper         | 🗃️ Archived (July 2025)      |
+|     1.21.5      |    _latest_     |      21      | Paper         | ✅ **February 2026** (Non-LTS) |
+|     1.21.4      |    _latest_     |      21      | Paper, Fabric | ✅ **February 2026** (Non-LTS) |
+|     1.21.3      |      3.7.1      |      21      | Paper, Fabric | 🗃️ Archived (December 2024)  |
+|     1.21.1      |    _latest_     |      21      | Paper, Fabric | ✅ **May 2026** (LTS)          |
+|     1.20.6      |      3.6.8      |      17      | Paper         | 🗃️ Archived (October 2024)   |
+|     1.20.4      |      3.6.8      |      17      | Paper         | 🗃️ Archived (July 2024)      |
+|     1.20.1      |      3.8.7      |      17      | Paper, Fabric | 🗃️ Archived (November 2024)  |
+| 1.17.1 - 1.19.4 |      3.6.8      |      17      | Paper         | 🗃️ Archived                  |
+|     1.16.5      |      3.2.1      |      16      | Paper         | 🗃️ Archived                  |
+
+HuskSync is primarily developed against the latest release. Old Minecraft versions are allocated a support channel based on popularity, mod support, etc:
+
+* Long Term Support (LTS) &ndash; Supported for up to 12-18 months
+* Non-Long Term Support (Non-LTS) &ndash; Supported for 3-6 months
+
+Verify your purchase on Discord and [Download HuskSync](https://william278.net/project/husksync/download) for your server.
 
 ## Setup
-1. Place the plugin jar file in the `/plugins/` directory of each Spigot server. You do not need to install HuskSync as a proxy plugin.
-2. Start, then stop every server to let HuskSync generate the config file.
-3. Navigate to the HuskSync config file on each server (`~/plugins/HuskSync/config.yml`) and fill in both the MySQL and Redis database credentials.
-4. Start every server again and synchronistaion will begin.
+Requires a [MySQL/MariaDB/Mongo/PostgreSQL database](https://william278.net/docs/husksync/database), a [Redis (v5.0+) server]((https://william278.net/docs/husksync/redis)) and a network of [compatible Spigot or Fabric Minecraft servers](https://william278.net/docs/husksync/compatibility).
 
-## Building
-To build HuskSync, simply run the following in the root of the repository:
-```
+1. Place the plugin jar file in the `/plugins` or `/mods` directory of each Spigot/Fabric server. You do not need to install HuskSync as a proxy plugin.
+2. Start, then stop every server to let HuskSync generate the config file.
+3. Navigate to the HuskSync config file on each server and fill in both your database and Redis server credentials.
+4. Start every server again and synchronization will begin.
+
+## Development
+To build HuskSync, simply run the following in the root of the repository (building requires Java 21). Builds will be output in `/target`:
+
+```bash
 ./gradlew clean build
 ```
 
-## License
-HuskSync is a premium resource. This source code is provided as reference only for those who have purchased the resource from an official source.
+HuskSync uses `essential-multi-version` (Fabric) and `preprocessor` (Bukkit) to target multiple versions of Minecraft in one codebase - [check here](https://github.com/WiIIiam278/PreProcessor?tab=readme-ov-file#code-example) for a preprocessor comment logic reference.
+
+### License
+HuskSync is licensed under the Apache 2.0 license.
 
 - [License](https://github.com/WiIIiam278/HuskSync/blob/master/LICENSE)
 
-## Contributing
-A code bounty program is in place for HuskSync, where developers making significant code contributions to HuskSync may be entitled to a license at my discretion to use HuskSync in commercial contexts without having to purchase the resource. Please read the information for contributors in the LICENSE file before submitting a pull request. 
+Contributions to the project are welcome&mdash;feel free to open a pull request with new features, improvements and/or fixes!
 
-## Translation
+### Support
+Due to its complexity, official binaries and customer support for HuskSync is provided through a paid model. This means that support is only available to users who have purchased a license to the plugin from Spigot, Polymart, or BuiltByBit and have provided proof of purchase. Please join our Discord server if you have done so and need help!
+
+### Translations
 Translations of the plugin locales are welcome to help make the plugin more accessible. Please submit a pull request with your translations as a `.yml` file.
 
 - [Locales Directory](https://github.com/WiIIiam278/HuskSync/tree/master/common/src/main/resources/locales)
 - [English Locales](https://github.com/WiIIiam278/HuskSync/tree/master/common/src/main/resources/locales/en-gb.yml)
 
-## bStats
-This plugin uses bStats to provide me with metrics about its usage:
-- [bStats Metrics](https://bstats.org/plugin/bukkit/HuskSync%20-%20Bukkit/13140)
-
-You can turn metric collection off by navigating to `~/plugins/bStats/config.yml` and editing the config to disable plugin metrics.
-
 ## Links
-- [Documentation, Guides & API](https://william278.net/docs/husksync/Home)
-- [Resource Page](https://www.spigotmc.org/resources/husksync.97144/)
-- [Bug Reports](https://github.com/WiIIiam278/HuskSync/issues)
-- [Discord Support](https://discord.gg/tVYhJfyDWG) (Proof of purchase required)
+- [Docs](https://william278.net/docs/husksync/) &mdash; Read the plugin documentation!
+- [Spigot](https://www.spigotmc.org/resources/husksync.97144/) &mdash; View the Spigot resource page (Also: [Polymart](https://polymart.org/resource/husksync.1634), [Craftaro](https://craftaro.com/marketplace/product/husksync.758), [BuiltByBit](https://builtbybit.com/resources/husksync.34956/))
+- [Issues](https://github.com/WiIIiam278/HuskSync/issues) &mdash; File a bug report or feature request
+- [Discord](https://discord.gg/tVYhJfyDWG) &mdash; Get help, ask questions (Purchase required)
+- [bStats](https://bstats.org/plugin/bukkit/HuskSync%20-%20Bukkit/13140) &mdash; View plugin metrics
 
 ---
-&copy; [William278](https://william278.net/), 2022. All rights reserved.
+&copy; [William278](https://william278.net/), 2025. Licensed under the Apache-2.0 License.

api/build.gradle

@@ -1,29 +0,0 @@
-dependencies {
-    implementation project(path: ':bukkit')
-    compileOnly project(path: ':common')
-
-    compileOnly 'org.spigotmc:spigot-api:1.16.5-R0.1-SNAPSHOT'
-    compileOnly 'org.jetbrains:annotations:23.0.0'
-}
-
-shadowJar {
-    relocate 'org.apache', 'net.william278.husksync.libraries'
-    relocate 'dev.dejvokep', 'net.william278.husksync.libraries'
-    relocate 'de.themoep', 'net.william278.husksync.libraries'
-    relocate 'org.jetbrains', 'net.william278.husksync.libraries'
-    relocate 'org.intellij', 'net.william278.husksync.libraries'
-    relocate 'com.zaxxer', 'net.william278.husksync.libraries'
-    relocate 'com.google', 'net.william278.husksync.libraries'
-    relocate 'redis.clients', 'net.william278.husksync.libraries'
-    relocate 'org.json', 'net.william278.husksync.libraries.json'
-
-    relocate 'net.byteflux.libby', 'net.william278.husksync.libraries.libby'
-    relocate 'org.bstats', 'net.william278.husksync.libraries.bstats'
-    relocate 'net.william278.mpdbconverter', 'net.william278.husksync.libraries.mpdbconverter'
-    relocate 'net.william278.hslmigrator', 'net.william278.husksync.libraries.hslconverter'
-}
-
-java {
-    withSourcesJar()
-    withJavadocJar()
-}

api/src/main/java/net/william278/husksync/api/HuskSyncAPI.java

@@ -1,203 +0,0 @@
-package net.william278.husksync.api;
-
-import net.william278.husksync.BukkitHuskSync;
-import net.william278.husksync.data.*;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.player.User;
-import org.bukkit.entity.Player;
-import org.bukkit.inventory.ItemStack;
-import org.bukkit.potion.PotionEffect;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Optional;
-import java.util.concurrent.CompletableFuture;
-
-/**
- * The HuskSync API implementation for the Bukkit platform, providing methods to access and modify player {@link UserData} held by {@link User}s.
- * </p>
- * Retrieve an instance of the API class via {@link #getInstance()}.
- */
-@SuppressWarnings("unused")
-public class HuskSyncAPI extends BaseHuskSyncAPI {
-
-    /**
-     * <b>(Internal use only)</b> - Instance of the API class
-     */
-    private static final HuskSyncAPI INSTANCE = new HuskSyncAPI();
-
-    /**
-     * <b>(Internal use only)</b> - Constructor, instantiating the API
-     */
-    private HuskSyncAPI() {
-        super(BukkitHuskSync.getInstance());
-    }
-
-    /**
-     * Entrypoint to the HuskSync API - returns an instance of the API
-     *
-     * @return instance of the HuskSync API
-     */
-    public static @NotNull HuskSyncAPI getInstance() {
-        return INSTANCE;
-    }
-
-    /**
-     * Returns a {@link User} instance for the given bukkit {@link Player}.
-     *
-     * @param player the bukkit player to get the {@link User} instance for
-     * @return the {@link User} instance for the given bukkit {@link Player}
-     * @since 2.0
-     */
-    @NotNull
-    public OnlineUser getUser(@NotNull Player player) {
-        return BukkitPlayer.adapt(player);
-    }
-
-    /**
-     * Set the inventory in the database of the given {@link User} to the given {@link ItemStack} contents
-     *
-     * @param user              the {@link User} to set the inventory of
-     * @param inventoryContents the {@link ItemStack} contents to set the inventory to
-     * @return future returning void when complete
-     * @since 2.0
-     */
-    public CompletableFuture<Void> setInventoryData(@NotNull User user, @NotNull ItemStack[] inventoryContents) {
-        return CompletableFuture.runAsync(() -> getUserData(user).thenAccept(userData ->
-                userData.ifPresent(data -> serializeItemStackArray(inventoryContents)
-                        .thenAccept(serializedInventory -> {
-                            data.getInventoryData().serializedItems = serializedInventory;
-                            setUserData(user, data).join();
-                        }))));
-    }
-
-    /**
-     * Set the inventory in the database of the given {@link User} to the given {@link BukkitInventoryMap} contents
-     *
-     * @param user         the {@link User} to set the inventory of
-     * @param inventoryMap the {@link BukkitInventoryMap} contents to set the inventory to
-     * @return future returning void when complete
-     * @since 2.0
-     */
-    public CompletableFuture<Void> setInventoryData(@NotNull User user, @NotNull BukkitInventoryMap inventoryMap) {
-        return setInventoryData(user, inventoryMap.getContents());
-    }
-
-    /**
-     * Set the Ender Chest in the database of the given {@link User} to the given {@link ItemStack} contents
-     *
-     * @param user               the {@link User} to set the Ender Chest of
-     * @param enderChestContents the {@link ItemStack} contents to set the Ender Chest to
-     * @return future returning void when complete
-     * @since 2.0
-     */
-    public CompletableFuture<Void> setEnderChestData(@NotNull User user, @NotNull ItemStack[] enderChestContents) {
-        return CompletableFuture.runAsync(() -> getUserData(user).thenAccept(userData ->
-                userData.ifPresent(data -> serializeItemStackArray(enderChestContents)
-                        .thenAccept(serializedInventory -> {
-                            data.getEnderChestData().serializedItems = serializedInventory;
-                            setUserData(user, data).join();
-                        }))));
-    }
-
-    /**
-     * Returns a {@link BukkitInventoryMap} for the given {@link User}, containing their current inventory item data
-     *
-     * @param user the {@link User} to get the {@link BukkitInventoryMap} for
-     * @return future returning the {@link BukkitInventoryMap} for the given {@link User} if they exist,
-     * otherwise an empty {@link Optional}
-     * @since 2.0
-     */
-    public CompletableFuture<Optional<BukkitInventoryMap>> getPlayerInventory(@NotNull User user) {
-        return CompletableFuture.supplyAsync(() -> getUserData(user).join()
-                .map(userData -> deserializeInventory(userData
-                        .getInventoryData().serializedItems).join()));
-    }
-
-    /**
-     * Returns the {@link ItemStack}s array contents of the given {@link User}'s Ender Chest data
-     *
-     * @param user the {@link User} to get the Ender Chest contents of
-     * @return future returning the {@link ItemStack} array of Ender Chest items for the user if they exist,
-     * otherwise an empty {@link Optional}
-     * @since 2.0
-     */
-    public CompletableFuture<Optional<ItemStack[]>> getPlayerEnderChest(@NotNull User user) {
-        return CompletableFuture.supplyAsync(() -> getUserData(user).join()
-                .map(userData -> deserializeItemStackArray(userData
-                        .getEnderChestData().serializedItems).join()));
-    }
-
-    /**
-     * Deserialize a Base-64 encoded inventory array string into a {@link ItemStack} array.
-     *
-     * @param serializedItemStackArray The Base-64 encoded inventory array string.
-     * @return The deserialized {@link ItemStack} array.
-     * @throws DataSerializationException If an error occurs during deserialization.
-     * @since 2.0
-     */
-    public CompletableFuture<ItemStack[]> deserializeItemStackArray(@NotNull String serializedItemStackArray)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> BukkitSerializer
-                .deserializeItemStackArray(serializedItemStackArray).join());
-    }
-
-    /**
-     * Deserialize a serialized {@link ItemStack} array of player inventory contents into a {@link BukkitInventoryMap}
-     *
-     * @param serializedInventory The serialized {@link ItemStack} array of player inventory contents.
-     * @return A {@link BukkitInventoryMap} of the deserialized {@link ItemStack} contents array
-     * @throws DataSerializationException If an error occurs during deserialization.
-     * @since 2.0
-     */
-    public CompletableFuture<BukkitInventoryMap> deserializeInventory(@NotNull String serializedInventory)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> BukkitSerializer
-                .deserializeInventory(serializedInventory).join());
-    }
-
-    /**
-     * Serialize an {@link ItemStack} array into a Base-64 encoded string.
-     *
-     * @param itemStacks The {@link ItemStack} array to serialize.
-     * @return The serialized Base-64 encoded string.
-     * @throws DataSerializationException If an error occurs during serialization.
-     * @see #deserializeItemStackArray(String)
-     * @see ItemData
-     * @since 2.0
-     */
-    public CompletableFuture<String> serializeItemStackArray(@NotNull ItemStack[] itemStacks)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> BukkitSerializer.serializeItemStackArray(itemStacks).join());
-    }
-
-    /**
-     * Deserialize a Base-64 encoded potion effect array string into a {@link PotionEffect} array.
-     *
-     * @param serializedPotionEffectArray The Base-64 encoded potion effect array string.
-     * @return The deserialized {@link PotionEffect} array.
-     * @throws DataSerializationException If an error occurs during deserialization.
-     * @since 2.0
-     */
-    public CompletableFuture<PotionEffect[]> deserializePotionEffectArray(@NotNull String serializedPotionEffectArray)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> BukkitSerializer
-                .deserializePotionEffectArray(serializedPotionEffectArray).join());
-    }
-
-    /**
-     * Serialize a {@link PotionEffect} array into a Base-64 encoded string.
-     *
-     * @param potionEffects The {@link PotionEffect} array to serialize.
-     * @return The serialized Base-64 encoded string.
-     * @throws DataSerializationException If an error occurs during serialization.
-     * @see #deserializePotionEffectArray(String)
-     * @see PotionEffectData
-     * @since 2.0
-     */
-    public CompletableFuture<String> serializePotionEffectArray(@NotNull PotionEffect[] potionEffects)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> BukkitSerializer.serializePotionEffectArray(potionEffects).join());
-    }
-
-}

build.gradle

@@ -1,41 +1,104 @@
+import org.apache.tools.ant.filters.ReplaceTokens
+
 plugins {
-    id 'com.github.johnrengelman.shadow' version '7.1.2'
-    id 'org.ajoberstar.grgit' version '5.0.0'
-    id 'java'
+    id 'com.gradleup.shadow' version '9.2.2'
+    id 'org.cadixdev.licenser' version '0.6.1' apply false
+    id 'dev.architectury.loom' version '1.9-SNAPSHOT' apply false
+    id 'gg.essential.multi-version.root' apply false
+    id 'org.ajoberstar.grgit' version '5.3.2'
     id 'maven-publish'
+    id 'java'
 }
 
 group 'net.william278'
-version "$ext.plugin_version+${versionMetadata()}"
+version "$ext.plugin_version${versionMetadata()}"
+description "$ext.plugin_description"
+defaultTasks 'licenseFormat', 'build'
 
 ext {
     set 'version', version.toString()
+    set 'description', description.toString()
+
+    set 'jedis_version', jedis_version.toString()
+    set 'mysql_driver_version', mysql_driver_version.toString()
+    set 'mariadb_driver_version', mariadb_driver_version.toString()
+    set 'postgres_driver_version', postgres_driver_version.toString()
+    set 'mongodb_driver_version', mongodb_driver_version.toString()
+    set 'snappy_version', snappy_version.toString()
 }
 
-import org.apache.tools.ant.filters.ReplaceTokens
+publishing {
+    repositories {
+        if (System.getenv("RELEASES_MAVEN_USERNAME") != null) {
+            maven {
+                name = "william278-releases"
+                url = "https://repo.william278.net/releases"
+                credentials {
+                    username = System.getenv("RELEASES_MAVEN_USERNAME")
+                    password = System.getenv("RELEASES_MAVEN_PASSWORD")
+                }
+                authentication {
+                    basic(BasicAuthentication)
+                }
+            }
+        }
+        if (System.getenv("SNAPSHOTS_MAVEN_USERNAME") != null) {
+            maven {
+                name = "william278-snapshots"
+                url = "https://repo.william278.net/snapshots"
+                credentials {
+                    username = System.getenv("SNAPSHOTS_MAVEN_USERNAME")
+                    password = System.getenv("SNAPSHOTS_MAVEN_PASSWORD")
+                }
+                authentication {
+                    basic(BasicAuthentication)
+                }
+            }
+        }
+    }
+}
 
 allprojects {
-    apply plugin: 'com.github.johnrengelman.shadow'
+    // Ignore parent projects (no jars)
+    if (project.name == 'fabric' || project.name == 'bukkit') {
+        return
+    }
+    
+    apply plugin: 'com.gradleup.shadow'
+    apply plugin: 'org.cadixdev.licenser'
     apply plugin: 'java'
 
     compileJava.options.encoding = 'UTF-8'
+    compileJava.options.release.set 17
     javadoc.options.encoding = 'UTF-8'
     javadoc.options.addStringOption('Xdoclint:none', '-quiet')
 
-    compileJava.options.release.set 16
-
     repositories {
         mavenLocal()
         mavenCentral()
+        maven { url 'https://repo.william278.net/releases/' }
+        maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
         maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/' }
+        maven { url 'https://repo.papermc.io/repository/maven-public/' }
+        maven { url 'https://repo.codemc.io/repository/maven-public/' }
         maven { url 'https://repo.minebench.de/' }
         maven { url 'https://repo.alessiodp.com/releases/' }
         maven { url 'https://jitpack.io' }
+        maven { url 'https://mvn-repo.arim.space/lesser-gpl3/' }
+        maven { url 'https://libraries.minecraft.net/' }
     }
 
     dependencies {
-        testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'
-        testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.8.2'
+        testImplementation(platform("org.junit:junit-bom:6.0.1"))
+        testImplementation 'org.junit.jupiter:junit-jupiter'
+        testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+        testCompileOnly 'org.jetbrains:annotations:26.0.2-1'
+    }
+
+    license {
+        header = rootProject.file('HEADER')
+        include '**/*.java'
+        newLine = true
     }
 
     test {
@@ -43,60 +106,128 @@ allprojects {
     }
 
     processResources {
-        filter ReplaceTokens as Class, beginToken: '${', endToken: '}',
-                tokens: rootProject.ext.properties
+        def tokenMap = rootProject.ext.properties
+        tokenMap.merge("grgit", '', (s, s2) -> s)
+        filesMatching(['**/*.json', '**/*.yml']) {
+            filter ReplaceTokens as Class, beginToken: '${', endToken: '}',
+                    tokens: tokenMap
+        }
     }
 }
 
 subprojects {
+    // Ignore parent projects (no jars)
+    if (['fabric', 'bukkit'].contains(project.name)) {
+        return
+    }
+
+    // Project naming
     version rootProject.version
-    archivesBaseName = "${rootProject.name}-${project.name.capitalize()}"
+    def name = "$rootProject.name"
+    if (rootProject != project.parent) {
+        name += "-${project.parent.name.capitalize()}"
+    } else {
+        name += "-${project.name.capitalize()}"
+    }
+    archivesBaseName = name
 
-    if (['bukkit', 'api', 'plugin'].contains(project.name)) {
-        shadowJar {
-            destinationDirectory.set(file("$rootDir/target"))
-            archiveClassifier.set('')
+    // Version-specific configuration
+    if (['fabric', 'bukkit'].contains(project.parent?.name)) {
+        compileJava.options.release.set 21
+        version += "+mc.${project.name}"
+
+        if (project.parent?.name?.equals('fabric')) {
+            apply plugin: 'dev.architectury.loom'
         }
+    }
 
-        // API publishing
-        if ('api'.contains(project.name)) {
-            java {
-                withSourcesJar()
-                withJavadocJar()
-            }
-            sourcesJar {
-                destinationDirectory.set(file("$rootDir/target"))
-            }
-            javadocJar {
-                destinationDirectory.set(file("$rootDir/target"))
-            }
-            shadowJar.dependsOn(sourcesJar, javadocJar)
+    jar {
+        from '../LICENSE'
+    }
 
-            publishing {
+    shadowJar {
+        destinationDirectory.set(file("$rootDir/target"))
+        archiveClassifier.set('')
+    }
+
+    // API publishing
+    if (project.name == 'common' || ['fabric', 'bukkit'].contains(project.parent?.name)) {
+        java {
+            withSourcesJar()
+            withJavadocJar()
+        }
+        sourcesJar {
+            destinationDirectory.set(file("$rootDir/target"))
+        }
+        javadocJar {
+            destinationDirectory.set(file("$rootDir/target"))
+        }
+        shadowJar.dependsOn(sourcesJar, javadocJar)
+
+        publishing {
+            if (['common'].contains(project.name)) {
                 publications {
-                    mavenJava(MavenPublication) {
-                        groupId = 'net.william278'
-                        artifactId = 'husksync'
+                    mavenJavaCommon(MavenPublication) {
+                        groupId = 'net.william278.husksync'
+                        artifactId = 'husksync-common'
                         version = "$rootProject.version"
                         artifact shadowJar
-                        artifact javadocJar
                         artifact sourcesJar
+                        artifact javadocJar
+                    }
+                }
+            }
+
+            if (project.parent?.name?.equals('bukkit')) {
+                publications {
+                    "mavenJavaBukkit_${project.name.replace('.', '_')}"(MavenPublication) {
+                        groupId = 'net.william278.husksync'
+                        artifactId = 'husksync-bukkit'
+                        version = "$rootProject.version+$project.name"
+                        artifact shadowJar
+                        artifact sourcesJar
+                        artifact javadocJar
+                    }
+                }
+            }
+
+            if (project.parent?.name?.equals('fabric')) {
+                publications {
+                    "mavenJavaFabric_${project.name.replace('.', '_')}"(MavenPublication) {
+                        groupId = 'net.william278.husksync'
+                        artifactId = 'husksync-fabric'
+                        version = "$rootProject.version+$project.name"
+                        artifact remapJar
+                        artifact sourcesJar
+                        artifact javadocJar
                     }
                 }
             }
         }
-
-        jar.dependsOn(shadowJar)
-        clean.delete "$rootDir/target"
     }
+
+    jar.dependsOn shadowJar
+    clean.delete "$rootDir/target"
 }
 
 logger.lifecycle("Building HuskSync ${version} by William278")
 
 @SuppressWarnings('GrMethodMayBeStatic')
 def versionMetadata() {
+    // Require grgit
     if (grgit == null) {
-        return System.getenv("GITHUB_RUN_NUMBER") ? 'build.' + System.getenv("GITHUB_RUN_NUMBER") : 'unknown'
+        return '-unknown'
     }
-    return 'rev.' + grgit.head().abbreviatedId + (grgit.status().clean ? '' : '-indev')
-}
+
+    // If unclean, return the last commit hash with -indev
+    if (!grgit.status().clean) {
+        return '-' + grgit.head().abbreviatedId + '-indev'
+    }
+
+    // Otherwise if this matches a tag, return nothing
+    def tag = grgit.tag.list().find { it.commit.id == grgit.head().id }
+    if (tag != null) {
+        return ''
+    }
+    return '-' + grgit.head().abbreviatedId
+}

bukkit/1.21.1/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version_range=1.21.1
+minecraft_version_numeric=12101
+minecraft_api_version=1.21
+paper_api_version=1.21.1-R0.1-SNAPSHOT

bukkit/1.21.10/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version_range=>=1.21.9 <=1.21.10
+minecraft_version_numeric=12110
+minecraft_api_version=1.21
+paper_api_version=1.21.10-R0.1-SNAPSHOT

bukkit/1.21.11/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version_range=>=1.21.11 <=1.21.11
+minecraft_version_numeric=12111
+minecraft_api_version=1.21
+paper_api_version=1.21.11-R0.1-SNAPSHOT

bukkit/1.21.4/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version_range=1.21.4
+minecraft_version_numeric=12104
+minecraft_api_version=1.21
+paper_api_version=1.21.4-R0.1-SNAPSHOT

bukkit/1.21.5/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version_range=1.21.5
+minecraft_version_numeric=12105
+minecraft_api_version=1.21
+paper_api_version=1.21.5-R0.1-SNAPSHOT

bukkit/1.21.8/gradle.properties

@@ -0,0 +1,4 @@
+minecraft_version_range=>=1.21.7 <=1.21.8
+minecraft_version_numeric=12108
+minecraft_api_version=1.21
+paper_api_version=1.21.8-R0.1-SNAPSHOT

bukkit/build.gradle

@@ -1,29 +1,102 @@
+plugins {
+    id 'java'
+    id 'net.william278.preprocessor' version '1.0'
+    id 'xyz.jpenilla.run-paper' version '2.3.1'
+    id 'maven-publish'
+}
+
 dependencies {
     implementation project(path: ':common')
-    implementation 'org.bstats:bstats-bukkit:3.0.0'
+
+    implementation 'net.william278.uniform:uniform-bukkit:1.3.9'
+    implementation 'net.william278.uniform:uniform-paper:1.3.9'
+    implementation 'net.william278.toilet:toilet-bukkit:1.0.16'
     implementation 'net.william278:mpdbdataconverter:1.0.1'
     implementation 'net.william278:hsldataconverter:1.0'
+    implementation 'net.william278:mapdataapi:2.0'
+    implementation 'org.bstats:bstats-bukkit:3.1.0'
+    implementation 'net.kyori:adventure-platform-bukkit:4.4.1'
+    implementation 'dev.triumphteam:triumph-gui:3.1.12'
+    implementation 'space.arim.morepaperlib:morepaperlib:0.4.4'
+    implementation 'de.tr7zw:item-nbt-api:2.15.5'
 
-    compileOnly 'redis.clients:jedis:4.2.3'
-    compileOnly 'commons-io:commons-io:2.11.0'
-    compileOnly 'de.themoep:minedown:1.7.1-SNAPSHOT'
-    compileOnly 'dev.dejvokep:boosted-yaml:1.2'
-    compileOnly 'org.spigotmc:spigot-api:1.16.5-R0.1-SNAPSHOT'
-    compileOnly 'com.zaxxer:HikariCP:5.0.1'
+    compileOnly "io.papermc.paper:paper-api:${paper_api_version}"
+    compileOnly 'com.github.retrooper:packetevents-spigot:2.10.1'
+    compileOnly 'com.github.dmulloy2:ProtocolLib:5.3.0'
+    compileOnly 'org.projectlombok:lombok:1.18.42'
+    compileOnly 'commons-io:commons-io:2.21.0'
+    compileOnly 'org.json:json:20250517'
+    compileOnly 'net.william278:minedown:1.8.2'
+    compileOnly 'de.exlll:configlib-yaml:4.6.4'
+    compileOnly 'com.zaxxer:HikariCP:7.0.2'
+    compileOnly 'net.william278:DesertWell:2.0.4'
+    compileOnly 'net.william278:AdvancementAPI:97a9583413'
+    compileOnly "redis.clients:jedis:$jedis_version"
+
+    annotationProcessor 'org.projectlombok:lombok:1.18.42'
+}
+
+processResources {
+    filesMatching(['**/*.json', '**/*.yml']) {
+        expand([
+                version: version,
+                paper_api_version: paper_api_version,
+                minecraft_version: project.name,
+                minecraft_version_range: minecraft_version_range,
+                minecraft_api_version: minecraft_api_version
+        ])
+    }
+}
+
+sourceSets.main {
+    java.srcDirs '../src/main/java'
+    resources.srcDirs '../src/main/resources'
+}
+javadoc.setSource('./build/generated/preprocessed/main/java')
+
+preprocess {
+    vars.put('MC', minecraft_version_numeric)
 }
 
 shadowJar {
-    relocate 'org.apache', 'net.william278.husksync.libraries'
+    dependencies {
+        exclude(dependency('com.mojang:brigadier'))
+    }
+
+    relocate 'org.apache.commons.io', 'net.william278.husksync.libraries.commons.io'
+    relocate 'org.apache.commons.text', 'net.william278.husksync.libraries.commons.text'
+    relocate 'org.apache.commons.lang3', 'net.william278.husksync.libraries.commons.lang3'
+    relocate 'com.google.gson', 'net.william278.husksync.libraries.gson'
+    relocate 'com.fatboyindustrial', 'net.william278.husksync.libraries'
     relocate 'de.themoep', 'net.william278.husksync.libraries'
     relocate 'org.jetbrains', 'net.william278.husksync.libraries'
     relocate 'org.intellij', 'net.william278.husksync.libraries'
     relocate 'com.zaxxer', 'net.william278.husksync.libraries'
-    relocate 'com.google', 'net.william278.husksync.libraries'
-    relocate 'redis.clients', 'net.william278.husksync.libraries'
-    relocate 'org.json', 'net.william278.husksync.libraries.json'
-
-    relocate 'net.byteflux.libby', 'net.william278.husksync.libraries.libby'
-    relocate 'org.bstats', 'net.william278.husksync.libraries.bstats'
+    relocate 'de.exlll', 'net.william278.husksync.libraries'
+    relocate 'net.william278.uniform', 'net.william278.husksync.libraries.uniform'
+    relocate 'net.william278.toilet', 'net.william278.husksync.libraries.toilet'
+    relocate 'net.william278.desertwell', 'net.william278.husksync.libraries.desertwell'
+    relocate 'net.william278.paginedown', 'net.william278.husksync.libraries.paginedown'
+    relocate 'net.william278.mapdataapi', 'net.william278.husksync.libraries.mapdataapi'
     relocate 'net.william278.mpdbconverter', 'net.william278.husksync.libraries.mpdbconverter'
     relocate 'net.william278.hslmigrator', 'net.william278.husksync.libraries.hslconverter'
+    relocate 'org.json', 'net.william278.husksync.libraries.json'
+    relocate 'net.querz', 'net.william278.husksync.libraries.nbtparser'
+    relocate 'net.roxeez', 'net.william278.husksync.libraries'
+    relocate 'org.bstats', 'net.william278.husksync.libraries.bstats'
+    relocate 'dev.triumphteam.gui', 'net.william278.husksync.libraries.triumphgui'
+    relocate 'space.arim.morepaperlib', 'net.william278.husksync.libraries.paperlib'
+    relocate 'de.tr7zw.changeme.nbtapi', 'net.william278.husksync.libraries.nbtapi'
+
+    minimize()
+}
+
+tasks {
+    runServer {
+        minecraftVersion(project.name)
+
+        downloadPlugins {
+            github("plan-player-analytics", "Plan", "5.6.2965", "Plan-5.6-build-2965.jar")
+        }
+    }
 }

bukkit/gradle.properties

@@ -0,0 +1,5 @@
+org.gradle.daemon=false
+org.gradle.parallel=true
+org.gradle.configureoncommand=true
+org.gradle.parallel.threads=4
+org.gradle.jvmargs=-Xmx8G

bukkit/src/main/java/net/william278/husksync/BukkitHuskSync.java

@@ -1,295 +1,403 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync;
 
-import dev.dejvokep.boostedyaml.YamlDocument;
-import dev.dejvokep.boostedyaml.dvs.versioning.BasicVersioning;
-import dev.dejvokep.boostedyaml.settings.dumper.DumperSettings;
-import dev.dejvokep.boostedyaml.settings.general.GeneralSettings;
-import dev.dejvokep.boostedyaml.settings.loader.LoaderSettings;
-import dev.dejvokep.boostedyaml.settings.updater.UpdaterSettings;
-import net.william278.husksync.command.BukkitCommand;
-import net.william278.husksync.command.BukkitCommandType;
-import net.william278.husksync.command.Permission;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import com.google.gson.Gson;
+import de.tr7zw.changeme.nbtapi.NBT;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import net.kyori.adventure.platform.AudienceProvider;
+import net.kyori.adventure.platform.bukkit.BukkitAudiences;
+import net.william278.desertwell.util.Version;
+import net.william278.husksync.adapter.DataAdapter;
+import net.william278.husksync.adapter.GsonAdapter;
+import net.william278.husksync.adapter.SnappyGsonAdapter;
+import net.william278.husksync.api.BukkitHuskSyncAPI;
+import net.william278.husksync.command.PluginCommand;
 import net.william278.husksync.config.Locales;
+import net.william278.husksync.config.Server;
 import net.william278.husksync.config.Settings;
-import net.william278.husksync.data.CompressedDataAdapter;
-import net.william278.husksync.data.DataAdapter;
-import net.william278.husksync.data.JsonDataAdapter;
+import net.william278.husksync.data.*;
 import net.william278.husksync.database.Database;
+import net.william278.husksync.database.MongoDbDatabase;
 import net.william278.husksync.database.MySqlDatabase;
-import net.william278.husksync.editor.DataEditor;
-import net.william278.husksync.event.BukkitEventCannon;
-import net.william278.husksync.event.EventCannon;
+import net.william278.husksync.database.PostgresDatabase;
+import net.william278.husksync.event.BukkitEventDispatcher;
 import net.william278.husksync.hook.PlanHook;
 import net.william278.husksync.listener.BukkitEventListener;
-import net.william278.husksync.listener.EventListener;
+import net.william278.husksync.listener.LockedHandler;
+import net.william278.husksync.maps.BukkitMapHandler;
 import net.william278.husksync.migrator.LegacyMigrator;
 import net.william278.husksync.migrator.Migrator;
 import net.william278.husksync.migrator.MpdbMigrator;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
 import net.william278.husksync.redis.RedisManager;
-import net.william278.husksync.util.*;
+import net.william278.husksync.sync.DataSyncer;
+import net.william278.husksync.user.BukkitUser;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.util.BukkitLegacyConverter;
+import net.william278.husksync.util.BukkitTask;
+import net.william278.husksync.util.LegacyConverter;
+import net.william278.toilet.BukkitToilet;
+import net.william278.toilet.Toilet;
+import net.william278.uniform.Uniform;
+import net.william278.uniform.bukkit.BukkitUniform;
 import org.bstats.bukkit.Metrics;
-import org.bukkit.Bukkit;
-import org.bukkit.command.PluginCommand;
 import org.bukkit.entity.Player;
-import org.bukkit.permissions.PermissionDefault;
+import org.bukkit.map.MapView;
 import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.jetbrains.annotations.NotNull;
+import space.arim.morepaperlib.MorePaperLib;
+import space.arim.morepaperlib.scheduling.AsynchronousScheduler;
+import space.arim.morepaperlib.scheduling.AttachedScheduler;
+import space.arim.morepaperlib.scheduling.GracefulScheduling;
+import space.arim.morepaperlib.scheduling.RegionalScheduler;
 
-import java.io.File;
-import java.io.IOException;
+import java.nio.file.Path;
 import java.util.*;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
 
-public class BukkitHuskSync extends JavaPlugin implements HuskSync {
+@Getter
+@NoArgsConstructor
+@SuppressWarnings("unchecked")
+public class BukkitHuskSync extends JavaPlugin implements HuskSync, BukkitTask.Supplier,
+        BukkitEventDispatcher, BukkitMapHandler {
 
     /**
      * Metrics ID for <a href="https://bstats.org/plugin/bukkit/HuskSync%20-%20Bukkit/13140">HuskSync on Bukkit</a>.
      */
     private static final int METRICS_ID = 13140;
+    private static final String PLATFORM_TYPE_ID = "bukkit";
+
+    private final HashMap<Identifier, Serializer<? extends Data>> serializers = Maps.newHashMap();
+    private final Map<UUID, Map<Identifier, Data>> playerCustomDataStore = Maps.newConcurrentMap();
+    private final Map<Integer, MapView> mapViews = Maps.newConcurrentMap();
+    private final List<Migrator> availableMigrators = Lists.newArrayList();
+    private final Set<UUID> lockedPlayers = Sets.newConcurrentHashSet();
+    private final Set<UUID> disconnectingPlayers = Sets.newConcurrentHashSet();
+
+    private boolean disabling;
+    private Gson gson;
+    private AudienceProvider audiences;
+    private Toilet toilet;
+    private MorePaperLib paperLib;
     private Database database;
     private RedisManager redisManager;
-    private Logger logger;
-    private ResourceReader resourceReader;
-    private EventListener eventListener;
+    private BukkitEventListener eventListener;
     private DataAdapter dataAdapter;
-    private DataEditor dataEditor;
-    private EventCannon eventCannon;
+    private DataSyncer dataSyncer;
+    private LegacyConverter legacyConverter;
+    private AsynchronousScheduler asyncScheduler;
+    private RegionalScheduler regionalScheduler;
+    @Setter
     private Settings settings;
+    @Setter
     private Locales locales;
-    private List<Migrator> availableMigrators;
-    private static BukkitHuskSync instance;
-
-    /**
-     * (<b>Internal use only)</b> Returns the instance of the implementing Bukkit plugin
-     *
-     * @return the instance of the Bukkit plugin
-     */
-    public static BukkitHuskSync getInstance() {
-        return instance;
-    }
+    @Setter
+    @Getter(AccessLevel.NONE)
+    private Server serverName;
 
     @Override
     public void onLoad() {
-        instance = this;
+        // Initial plugin setup
+        this.disabling = false;
+        this.gson = createGson();
+        this.paperLib = new MorePaperLib(this);
+
+        // Load settings and locales
+        initialize("plugin config & locale files", (plugin) -> {
+            loadSettings();
+            loadLocales();
+            loadServer();
+            validateConfigFiles();
+        });
+
+        this.eventListener = createEventListener();
+        eventListener.onLoad();
     }
 
     @Override
     public void onEnable() {
-        // Initialize HuskSync
-        final AtomicBoolean initialized = new AtomicBoolean(true);
-        try {
-            // Set the logging adapter and resource reader
-            this.logger = new BukkitLogger(this.getLogger());
-            this.resourceReader = new BukkitResourceReader(this);
+        this.audiences = BukkitAudiences.create(this);
+        this.toilet = BukkitToilet.create(getDumpOptions());
 
-            // Load settings and locales
-            getLoggingAdapter().log(Level.INFO, "Loading plugin configuration settings & locales...");
-            initialized.set(reload().join());
-            if (initialized.get()) {
-                logger.showDebugLogs(settings.getBooleanValue(Settings.ConfigOption.DEBUG_LOGGING));
-                getLoggingAdapter().log(Level.INFO, "Successfully loaded plugin configuration settings & locales");
-            } else {
-                throw new HuskSyncInitializationException("Failed to load plugin configuration settings and/or locales");
-            }
+        // Check compatibility
+        checkCompatibility();
 
-            // Prepare data adapter
-            if (settings.getBooleanValue(Settings.ConfigOption.SYNCHRONIZATION_COMPRESS_DATA)) {
-                dataAdapter = new CompressedDataAdapter();
-            } else {
-                dataAdapter = new JsonDataAdapter();
-            }
-
-            // Prepare event cannon
-            eventCannon = new BukkitEventCannon();
-
-            // Prepare data editor
-            dataEditor = new DataEditor(locales);
-
-            // Prepare migrators
-            availableMigrators = new ArrayList<>();
-            availableMigrators.add(new LegacyMigrator(this));
-            final Plugin mySqlPlayerDataBridge = Bukkit.getPluginManager().getPlugin("MySqlPlayerDataBridge");
-            if (mySqlPlayerDataBridge != null) {
-                availableMigrators.add(new MpdbMigrator(this, mySqlPlayerDataBridge));
-            }
-
-            // Prepare database connection
-            this.database = new MySqlDatabase(settings, resourceReader, logger, dataAdapter, eventCannon);
-            getLoggingAdapter().log(Level.INFO, "Attempting to establish connection to the database...");
-            initialized.set(this.database.initialize());
-            if (initialized.get()) {
-                getLoggingAdapter().log(Level.INFO, "Successfully established a connection to the database");
-            } else {
-                throw new HuskSyncInitializationException("Failed to establish a connection to the database. " +
-                                                          "Please check the supplied database credentials in the config file");
-            }
-
-            // Prepare redis connection
-            this.redisManager = new RedisManager(this);
-            getLoggingAdapter().log(Level.INFO, "Attempting to establish connection to the Redis server...");
-            initialized.set(this.redisManager.initialize().join());
-            if (initialized.get()) {
-                getLoggingAdapter().log(Level.INFO, "Successfully established a connection to the Redis server");
-            } else {
-                throw new HuskSyncInitializationException("Failed to establish a connection to the Redis server. " +
-                                                          "Please check the supplied Redis credentials in the config file");
-            }
-
-            // Register events
-            getLoggingAdapter().log(Level.INFO, "Registering events...");
-            this.eventListener = new BukkitEventListener(this);
-            getLoggingAdapter().log(Level.INFO, "Successfully registered events listener");
-
-            // Register permissions
-            getLoggingAdapter().log(Level.INFO, "Registering permissions & commands...");
-            Arrays.stream(Permission.values()).forEach(permission -> getServer().getPluginManager()
-                    .addPermission(new org.bukkit.permissions.Permission(permission.node, switch (permission.defaultAccess) {
-                        case EVERYONE -> PermissionDefault.TRUE;
-                        case NOBODY -> PermissionDefault.FALSE;
-                        case OPERATORS -> PermissionDefault.OP;
-                    })));
-
-            // Register commands
-            for (final BukkitCommandType bukkitCommandType : BukkitCommandType.values()) {
-                final PluginCommand pluginCommand = getCommand(bukkitCommandType.commandBase.command);
-                if (pluginCommand != null) {
-                    new BukkitCommand(bukkitCommandType.commandBase, this).register(pluginCommand);
-                }
-            }
-            getLoggingAdapter().log(Level.INFO, "Successfully registered permissions & commands");
-
-            // Hook into plan
-            if (Bukkit.getPluginManager().getPlugin("Plan") != null) {
-                getLoggingAdapter().log(Level.INFO, "Enabling Plan integration...");
-                new PlanHook(database, logger).hookIntoPlan();
-                getLoggingAdapter().log(Level.INFO, "Plan integration enabled!");
-            }
-
-            // Hook into bStats metrics
-            try {
-                new Metrics(this, METRICS_ID);
-            } catch (final Exception e) {
-                getLoggingAdapter().log(Level.WARNING, "Skipped bStats metrics initialization due to an exception.");
-            }
-
-            // Check for updates
-            if (settings.getBooleanValue(Settings.ConfigOption.CHECK_FOR_UPDATES)) {
-                getLoggingAdapter().log(Level.INFO, "Checking for updates...");
-                CompletableFuture.runAsync(() -> new UpdateChecker(getPluginVersion(), getLoggingAdapter()).logToConsole());
-            }
-        } catch (HuskSyncInitializationException exception) {
-            getLoggingAdapter().log(Level.SEVERE, exception.getMessage());
-            initialized.set(false);
-        } catch (Exception exception) {
-            getLoggingAdapter().log(Level.SEVERE, "An unhandled exception occurred initializing HuskSync!", exception);
-            initialized.set(false);
-        } finally {
-            // Validate initialization
-            if (initialized.get()) {
-                getLoggingAdapter().log(Level.INFO, "Successfully enabled HuskSync v" + getPluginVersion());
-            } else {
-                getLoggingAdapter().log(Level.SEVERE, "Failed to initialize HuskSync. The plugin will now be disabled");
-                getServer().getPluginManager().disablePlugin(this);
-            }
+        // Preload NBT-API
+        if (!NBT.preloadApi()) {
+            log(Level.SEVERE, "Failed to load NBT API. HuskSync will not be initialized!");
+            return;
         }
+
+        // Register commands
+        initialize("commands", (plugin) -> getUniform().register(PluginCommand.Type.create(this)));
+
+        // Prepare data adapter
+        initialize("data adapter", (plugin) -> {
+            if (settings.getSynchronization().isCompressData()) {
+                dataAdapter = new SnappyGsonAdapter(this);
+            } else {
+                dataAdapter = new GsonAdapter(this);
+            }
+        });
+
+        // Prepare serializers
+        initialize("data serializers", (plugin) -> {
+            registerSerializer(Identifier.PERSISTENT_DATA, new BukkitSerializer.PersistentData(this));
+            registerSerializer(Identifier.INVENTORY, new BukkitSerializer.Inventory(this));
+            registerSerializer(Identifier.ENDER_CHEST, new BukkitSerializer.EnderChest(this));
+            registerSerializer(Identifier.ADVANCEMENTS, new BukkitSerializer.Advancements(this));
+            registerSerializer(Identifier.STATISTICS, new Serializer.Json<>(this, BukkitData.Statistics.class));
+            registerSerializer(Identifier.POTION_EFFECTS, new BukkitSerializer.PotionEffects(this));
+            registerSerializer(Identifier.GAME_MODE, new Serializer.Json<>(this, BukkitData.GameMode.class));
+            registerSerializer(Identifier.FLIGHT_STATUS, new Serializer.Json<>(this, BukkitData.FlightStatus.class));
+            registerSerializer(Identifier.ATTRIBUTES, new Serializer.Json<>(this, BukkitData.Attributes.class));
+            registerSerializer(Identifier.HEALTH, new Serializer.Json<>(this, BukkitData.Health.class));
+            registerSerializer(Identifier.HUNGER, new Serializer.Json<>(this, BukkitData.Hunger.class));
+            registerSerializer(Identifier.EXPERIENCE, new Serializer.Json<>(this, BukkitData.Experience.class));
+            registerSerializer(Identifier.LOCATION, new Serializer.Json<>(this, BukkitData.Location.class));
+            validateDependencies();
+        });
+
+        // Setup available migrators
+        initialize("data migrators/converters", (plugin) -> {
+            availableMigrators.add(new LegacyMigrator(this));
+            if (isDependencyLoaded("MySqlPlayerDataBridge")) {
+                availableMigrators.add(new MpdbMigrator(this));
+            }
+            legacyConverter = new BukkitLegacyConverter(this);
+        });
+
+        // Initialize the database
+        initialize(getSettings().getDatabase().getType().getDisplayName() + " database connection", (plugin) -> {
+            this.database = switch (settings.getDatabase().getType()) {
+                case MYSQL, MARIADB -> new MySqlDatabase(this);
+                case POSTGRES -> new PostgresDatabase(this);
+                case MONGO -> new MongoDbDatabase(this);
+            };
+            this.database.initialize();
+        });
+
+        // Prepare redis connection
+        initialize("Redis server connection", (plugin) -> {
+            this.redisManager = new RedisManager(this);
+            this.redisManager.initialize();
+        });
+
+        // Prepare data syncer
+        initialize("data syncer", (plugin) -> {
+            dataSyncer = getSettings().getSynchronization().getMode().create(this);
+            dataSyncer.initialize();
+        });
+
+        // Register events
+        initialize("events", (plugin) -> eventListener.onEnable());
+
+        // Register plugin hooks
+        initialize("hooks", (plugin) -> {
+            if (isDependencyLoaded("Plan") && getSettings().isEnablePlanHook()) {
+                new PlanHook(this).hookIntoPlan();
+            }
+        });
+
+        // Register API
+        initialize("api", (plugin) -> BukkitHuskSyncAPI.register(this));
+
+        // Hook into bStats and check for updates
+        initialize("metrics", (plugin) -> this.registerMetrics(METRICS_ID));
+        this.checkForUpdates();
     }
 
     @Override
     public void onDisable() {
+        // Handle shutdown
+        this.disabling = true;
+
+        // Close the event listener / data syncer
+        if (this.dataSyncer != null) {
+            this.dataSyncer.terminate();
+        }
         if (this.eventListener != null) {
             this.eventListener.handlePluginDisable();
         }
-        getLoggingAdapter().log(Level.INFO, "Successfully disabled HuskSync v" + getPluginVersion());
+
+        // Unregister API and cancel tasks
+        BukkitHuskSyncAPI.unregister();
+        this.cancelTasks();
+
+        // Complete shutdown
+        log(Level.INFO, "Successfully disabled HuskSync v" + getPluginVersion());
+    }
+
+    @NotNull
+    protected BukkitEventListener createEventListener() {
+        return new BukkitEventListener(this);
     }
 
     @Override
-    public @NotNull Set<OnlineUser> getOnlineUsers() {
-        return Bukkit.getOnlinePlayers().stream().map(BukkitPlayer::adapt).collect(Collectors.toSet());
+    @NotNull
+    public Set<OnlineUser> getOnlineUsers() {
+        return getServer().getOnlinePlayers().stream()
+                .map(player -> BukkitUser.adapt(player, this))
+                .collect(Collectors.toSet());
     }
 
     @Override
-    public @NotNull Optional<OnlineUser> getOnlineUser(@NotNull UUID uuid) {
-        final Player player = Bukkit.getPlayer(uuid);
+    @NotNull
+    public Optional<OnlineUser> getOnlineUser(@NotNull UUID uuid) {
+        final Player player = getServer().getPlayer(uuid);
         if (player == null) {
             return Optional.empty();
         }
-        return Optional.of(BukkitPlayer.adapt(player));
+        return Optional.of(BukkitUser.adapt(player, this));
     }
 
     @Override
-    public @NotNull Database getDatabase() {
-        return database;
+    public void setDataSyncer(@NotNull DataSyncer dataSyncer) {
+        log(Level.INFO, String.format("Switching data syncer to %s", dataSyncer.getClass().getSimpleName()));
+        this.dataSyncer = dataSyncer;
     }
 
     @Override
-    public @NotNull RedisManager getRedisManager() {
-        return redisManager;
-    }
-
-    @Override
-    public @NotNull DataAdapter getDataAdapter() {
-        return dataAdapter;
-    }
-
-    @Override
-    public @NotNull DataEditor getDataEditor() {
-        return dataEditor;
-    }
-
-    @Override
-    public @NotNull EventCannon getEventCannon() {
-        return eventCannon;
+    @NotNull
+    public Uniform getUniform() {
+        return BukkitUniform.getInstance(this);
     }
 
     @NotNull
     @Override
-    public List<Migrator> getAvailableMigrators() {
-        return availableMigrators;
+    public Map<Identifier, Data> getPlayerCustomDataStore(@NotNull OnlineUser user) {
+        return playerCustomDataStore.compute(
+                user.getUuid(),
+                (uuid, data) -> data == null ? Maps.newHashMap() : data
+        );
     }
 
     @Override
-    public @NotNull Settings getSettings() {
-        return settings;
+    @NotNull
+    public String getServerName() {
+        return serverName == null ? "server" : serverName.getName();
     }
 
     @Override
-    public @NotNull Locales getLocales() {
-        return locales;
+    public boolean isDependencyLoaded(@NotNull String name) {
+        final Plugin plugin = getServer().getPluginManager().getPlugin(name);
+        return plugin != null;
+    }
+
+    // Register bStats metrics
+    public void registerMetrics(int metricsId) {
+        if (!getPluginVersion().getMetadata().isBlank()) {
+            return;
+        }
+
+        try {
+            new Metrics(this, metricsId);
+        } catch (Throwable e) {
+            log(Level.WARNING, "Failed to register bStats metrics (%s)".formatted(e.getMessage()));
+        }
     }
 
     @Override
-    public @NotNull Logger getLoggingAdapter() {
-        return logger;
+    public void log(@NotNull Level level, @NotNull String message, @NotNull Throwable... throwable) {
+        if (throwable.length > 0) {
+            getLogger().log(level, message, throwable[0]);
+        } else {
+            getLogger().log(level, message);
+        }
+    }
+
+    @NotNull
+    @Override
+    public Version getPluginVersion() {
+        return Version.fromString(getDescription().getVersion(), "-");
+    }
+
+    @NotNull
+    @Override
+    public Version getMinecraftVersion() {
+        return Version.fromString(getServer().getBukkitVersion());
+    }
+
+    @NotNull
+    @Override
+    public String getPlatformType() {
+        return PLATFORM_TYPE_ID;
     }
 
     @Override
-    public @NotNull Version getPluginVersion() {
-        return Version.pluginVersion(getDescription().getVersion());
+    @NotNull
+    public String getServerVersion() {
+        return String.format("%s/%s", getServer().getName(), getServer().getVersion());
     }
 
     @Override
-    public @NotNull Version getMinecraftVersion() {
-        return Version.minecraftVersion(Bukkit.getBukkitVersion());
+    public Optional<LegacyConverter> getLegacyConverter() {
+        return Optional.of(legacyConverter);
     }
 
     @Override
-    public CompletableFuture<Boolean> reload() {
-        return CompletableFuture.supplyAsync(() -> {
-            try {
-                this.settings = Settings.load(YamlDocument.create(new File(getDataFolder(), "config.yml"), Objects.requireNonNull(resourceReader.getResource("config.yml")), GeneralSettings.builder().setUseDefaults(false).build(), LoaderSettings.builder().setAutoUpdate(true).build(), DumperSettings.builder().setEncoding(DumperSettings.Encoding.UNICODE).build(), UpdaterSettings.builder().setVersioning(new BasicVersioning("config_version")).build()));
-
-                this.locales = Locales.load(YamlDocument.create(new File(getDataFolder(), "messages-" + settings.getStringValue(Settings.ConfigOption.LANGUAGE) + ".yml"), Objects.requireNonNull(resourceReader.getResource("locales/" + settings.getStringValue(Settings.ConfigOption.LANGUAGE) + ".yml"))));
-                return true;
-            } catch (IOException | NullPointerException e) {
-                getLoggingAdapter().log(Level.SEVERE, "Failed to load data from the config", e);
-                return false;
-            }
-        });
+    @NotNull
+    public LockedHandler getLockedHandler() {
+        return eventListener.getLockedHandler();
     }
+
+    @NotNull
+    public GracefulScheduling getScheduler() {
+        return paperLib.scheduling();
+    }
+
+    @NotNull
+    public AsynchronousScheduler getAsyncScheduler() {
+        return asyncScheduler == null
+                ? asyncScheduler = getScheduler().asyncScheduler() : asyncScheduler;
+    }
+
+    @NotNull
+    public RegionalScheduler getSyncScheduler() {
+        return regionalScheduler == null
+                ? regionalScheduler = getScheduler().globalRegionalScheduler() : regionalScheduler;
+    }
+
+    @NotNull
+    public AttachedScheduler getUserSyncScheduler(@NotNull UserDataHolder user) {
+        return getScheduler().entitySpecificScheduler(((BukkitUser) user).getPlayer());
+    }
+
+    @Override
+    @NotNull
+    public Path getConfigDirectory() {
+        return getDataFolder().toPath();
+    }
+
+    @Override
+    @NotNull
+    public BukkitHuskSync getPlugin() {
+        return this;
+    }
+
 }

bukkit/src/main/java/net/william278/husksync/PaperHuskSync.java

@@ -0,0 +1,60 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync;
+
+import net.kyori.adventure.audience.Audience;
+import net.william278.desertwell.util.Version;
+import net.william278.husksync.listener.BukkitEventListener;
+import net.william278.husksync.listener.PaperEventListener;
+import net.william278.uniform.Uniform;
+import net.william278.uniform.paper.PaperUniform;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+@SuppressWarnings({"unused"})
+public class PaperHuskSync extends BukkitHuskSync {
+
+    @NotNull
+    @Override
+    protected BukkitEventListener createEventListener() {
+        return new PaperEventListener(this);
+    }
+
+    @NotNull
+    @Override
+    public Audience getAudience(@NotNull UUID user) {
+        final Player player = getServer().getPlayer(user);
+        return player == null || !player.isOnline() ? Audience.empty() : player;
+    }
+
+    @NotNull
+    @Override
+    public Version getMinecraftVersion() {
+        return Version.fromString(getServer().getMinecraftVersion());
+    }
+
+    @Override
+    @NotNull
+    public Uniform getUniform() {
+        return PaperUniform.getInstance(this);
+    }
+}

bukkit/src/main/java/net/william278/husksync/PaperHuskSyncLoader.java

@@ -0,0 +1,90 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync;
+
+import de.exlll.configlib.Configuration;
+import de.exlll.configlib.YamlConfigurations;
+import io.papermc.paper.plugin.loader.PluginClasspathBuilder;
+import io.papermc.paper.plugin.loader.PluginLoader;
+import io.papermc.paper.plugin.loader.library.impl.MavenLibraryResolver;
+import lombok.NoArgsConstructor;
+import org.eclipse.aether.artifact.DefaultArtifact;
+import org.eclipse.aether.graph.Dependency;
+import org.eclipse.aether.repository.RemoteRepository;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.InputStream;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Stream;
+
+@NoArgsConstructor
+@SuppressWarnings("UnstableApiUsage")
+public class PaperHuskSyncLoader implements PluginLoader {
+
+    @Override
+    public void classloader(@NotNull PluginClasspathBuilder classpathBuilder) {
+        final MavenLibraryResolver resolver = new MavenLibraryResolver();
+
+        resolveLibraries(classpathBuilder).stream()
+                .map(DefaultArtifact::new)
+                .forEach(artifact -> resolver.addDependency(new Dependency(artifact, null)));
+        resolver.addRepository(new RemoteRepository.Builder("maven", "default", getMavenUrl()).build());
+
+        classpathBuilder.addLibrary(resolver);
+    }
+
+    @NotNull
+    private static String getMavenUrl() {
+        return Stream.of(
+                System.getenv("PAPER_DEFAULT_CENTRAL_REPOSITORY"),
+                System.getProperty("org.bukkit.plugin.java.LibraryLoader.centralURL"),
+                "https://maven-central.storage-download.googleapis.com/maven2"
+        ).filter(Objects::nonNull).findFirst().orElseThrow(IllegalStateException::new);
+    }
+
+    @NotNull
+    private static List<String> resolveLibraries(@NotNull PluginClasspathBuilder classpathBuilder) {
+        try (InputStream input = getLibraryListFile()) {
+            return YamlConfigurations.read(
+                    Objects.requireNonNull(input, "Failed to read libraries file"),
+                    PaperLibraries.class
+            ).libraries;
+        } catch (Throwable e) {
+            classpathBuilder.getContext().getLogger().error("Failed to resolve libraries", e);
+        }
+        return List.of();
+    }
+
+    @Nullable
+    private static InputStream getLibraryListFile() {
+        return PaperHuskSyncLoader.class.getClassLoader().getResourceAsStream("paper-libraries.yml");
+    }
+
+    @Configuration
+    @NoArgsConstructor
+    public static class PaperLibraries {
+
+        private List<String> libraries;
+
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/api/BukkitHuskSyncAPI.java

@@ -0,0 +1,264 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.api;
+
+import net.william278.desertwell.util.ThrowingConsumer;
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.data.DataHolder;
+import net.william278.husksync.user.BukkitUser;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+
+/**
+ * The HuskSync API implementation for the Bukkit platform
+ * </p>
+ * Retrieve an instance of the API class via {@link #getInstance()}.
+ */
+@SuppressWarnings("unused")
+public class BukkitHuskSyncAPI extends HuskSyncAPI {
+
+    /**
+     * <b>(Internal use only)</b> - Constructor, instantiating the API.
+     */
+    @ApiStatus.Internal
+    private BukkitHuskSyncAPI(@NotNull BukkitHuskSync plugin) {
+        super(plugin);
+    }
+
+    /**
+     * Entrypoint to the HuskSync API on the bukkit platform - returns an instance of the API
+     *
+     * @return instance of the HuskSync API
+     * @since 3.0
+     */
+    @NotNull
+    public static BukkitHuskSyncAPI getInstance() {
+        if (!JavaPlugin.getProvidingPlugin(BukkitHuskSyncAPI.class).getName().equals("HuskSync")) {
+            throw new NotRegisteredException("This is likely because you have shaded HuskSync into your plugin JAR " +
+                                             "and need to fix your maven/gradle/build script so that it *compiles against* HuskSync instead.");
+        }
+        if (instance == null) {
+            throw new NotRegisteredException();
+        }
+        return (BukkitHuskSyncAPI) instance;
+    }
+
+    /**
+     * <b>(Internal use only)</b> - Register the API for this platform.
+     *
+     * @param plugin the plugin instance
+     * @since 3.0
+     */
+    @ApiStatus.Internal
+    public static void register(@NotNull BukkitHuskSync plugin) {
+        instance = new BukkitHuskSyncAPI(plugin);
+    }
+
+    /**
+     * Returns a {@link OnlineUser} instance for the given bukkit {@link Player}.
+     *
+     * @param player the bukkit player to get the {@link OnlineUser} instance for
+     * @return the {@link OnlineUser} instance for the given bukkit {@link Player}
+     * @since 2.0
+     */
+    @NotNull
+    public BukkitUser getUser(@NotNull Player player) {
+        return BukkitUser.adapt(player, plugin);
+    }
+
+    /**
+     * Get the current {@link BukkitData.Items.Inventory} of the given {@link User}
+     *
+     * @param user the user to get the inventory of
+     * @return the {@link BukkitData.Items.Inventory} of the given {@link User}
+     * @since 3.0
+     */
+    public CompletableFuture<Optional<BukkitData.Items.Inventory>> getCurrentInventory(@NotNull User user) {
+        return getCurrentData(user).thenApply(data -> data.flatMap(DataHolder::getInventory)
+                .map(BukkitData.Items.Inventory.class::cast));
+    }
+
+    /**
+     * Get the current {@link BukkitData.Items.Inventory} of the given {@link Player}
+     *
+     * @param user the user to get the inventory of
+     * @return the {@link BukkitData.Items.Inventory} of the given {@link Player}
+     * @since 3.0
+     */
+    public CompletableFuture<Optional<ItemStack[]>> getCurrentInventoryContents(@NotNull User user) {
+        return getCurrentInventory(user)
+                .thenApply(inventory -> inventory.map(BukkitData.Items.Inventory::getContents));
+    }
+
+    /**
+     * Set the current {@link BukkitData.Items.Inventory} of the given {@link User}
+     *
+     * @param user     the user to set the inventory of
+     * @param contents the contents to set the inventory to
+     * @since 3.0
+     */
+    public void setCurrentInventory(@NotNull User user, @NotNull BukkitData.Items.Inventory contents) {
+        editCurrentData(user, dataHolder -> dataHolder.setInventory(contents));
+    }
+
+    /**
+     * Set the current {@link BukkitData.Items.Inventory} of the given {@link User}
+     *
+     * @param user     the user to set the inventory of
+     * @param contents the contents to set the inventory to
+     * @since 3.0
+     */
+    public void setCurrentInventoryContents(@NotNull User user, @NotNull ItemStack[] contents) {
+        editCurrentData(
+                user,
+                dataHolder -> dataHolder.getInventory().ifPresent(
+                        inv -> inv.setContents(adaptItems(contents))
+                )
+        );
+    }
+
+    /**
+     * Edit the current {@link BukkitData.Items.Inventory} of the given {@link User}
+     *
+     * @param user   the user to edit the inventory of
+     * @param editor the editor to apply to the inventory
+     * @since 3.0
+     */
+    public void editCurrentInventory(@NotNull User user, ThrowingConsumer<BukkitData.Items.Inventory> editor) {
+        editCurrentData(user, dataHolder -> dataHolder.getInventory()
+                .map(BukkitData.Items.Inventory.class::cast)
+                .ifPresent(editor));
+    }
+
+    /**
+     * Edit the current {@link BukkitData.Items.Inventory} of the given {@link User}
+     *
+     * @param user   the user to edit the inventory of
+     * @param editor the editor to apply to the inventory
+     * @since 3.0
+     */
+    public void editCurrentInventoryContents(@NotNull User user, ThrowingConsumer<ItemStack[]> editor) {
+        editCurrentData(user, dataHolder -> dataHolder.getInventory()
+                .map(BukkitData.Items.Inventory.class::cast)
+                .ifPresent(inventory -> editor.accept(inventory.getContents())));
+    }
+
+    /**
+     * Get the current {@link BukkitData.Items.EnderChest} of the given {@link User}
+     *
+     * @param user the user to get the ender chest of
+     * @return the {@link BukkitData.Items.EnderChest} of the given {@link User}, or {@link Optional#empty()} if the
+     * user data could not be found
+     * @since 3.0
+     */
+    public CompletableFuture<Optional<BukkitData.Items.EnderChest>> getCurrentEnderChest(@NotNull User user) {
+        return getCurrentData(user).thenApply(data -> data.flatMap(DataHolder::getEnderChest)
+                .map(BukkitData.Items.EnderChest.class::cast));
+    }
+
+    /**
+     * Get the current {@link BukkitData.Items.EnderChest} of the given {@link Player}
+     *
+     * @param user the user to get the ender chest of
+     * @return the {@link BukkitData.Items.EnderChest} of the given {@link Player}, or {@link Optional#empty()} if the
+     * user data could not be found
+     * @since 3.0
+     */
+    public CompletableFuture<Optional<ItemStack[]>> getCurrentEnderChestContents(@NotNull User user) {
+        return getCurrentEnderChest(user)
+                .thenApply(enderChest -> enderChest.map(BukkitData.Items.EnderChest::getContents));
+    }
+
+    /**
+     * Set the current {@link BukkitData.Items.EnderChest} of the given {@link User}
+     *
+     * @param user     the user to set the ender chest of
+     * @param contents the contents to set the ender chest to
+     * @since 3.0
+     */
+    public void setCurrentEnderChest(@NotNull User user, @NotNull BukkitData.Items.EnderChest contents) {
+        editCurrentData(user, dataHolder -> dataHolder.setEnderChest(contents));
+    }
+
+    /**
+     * Set the current {@link BukkitData.Items.EnderChest} of the given {@link User}
+     *
+     * @param user     the user to set the ender chest of
+     * @param contents the contents to set the ender chest to
+     * @since 3.0
+     */
+    public void setCurrentEnderChestContents(@NotNull User user, @NotNull ItemStack[] contents) {
+        editCurrentData(
+                user,
+                dataHolder -> dataHolder.getEnderChest().ifPresent(
+                        enderChest -> enderChest.setContents(adaptItems(contents))
+                )
+        );
+    }
+
+    /**
+     * Edit the current {@link BukkitData.Items.EnderChest} of the given {@link User}
+     *
+     * @param user   the user to edit the ender chest of
+     * @param editor the editor to apply to the ender chest
+     * @since 3.0
+     */
+    public void editCurrentEnderChest(@NotNull User user, Consumer<BukkitData.Items.EnderChest> editor) {
+        editCurrentData(user, dataHolder -> dataHolder.getEnderChest()
+                .map(BukkitData.Items.EnderChest.class::cast)
+                .ifPresent(editor));
+    }
+
+    /**
+     * Edit the current {@link BukkitData.Items.EnderChest} of the given {@link User}
+     *
+     * @param user   the user to edit the ender chest of
+     * @param editor the editor to apply to the ender chest
+     * @since 3.0
+     */
+    public void editCurrentEnderChestContents(@NotNull User user, Consumer<ItemStack[]> editor) {
+        editCurrentData(user, dataHolder -> dataHolder.getEnderChest()
+                .map(BukkitData.Items.EnderChest.class::cast)
+                .ifPresent(enderChest -> editor.accept(enderChest.getContents())));
+    }
+
+    /**
+     * Adapts an array of {@link ItemStack} to a {@link BukkitData.Items} instance
+     *
+     * @param contents the contents to adapt
+     * @return the adapted {@link BukkitData.Items} instance
+     * @since 3.0
+     */
+    @NotNull
+    public BukkitData.Items adaptItems(@NotNull ItemStack[] contents) {
+        return BukkitData.Items.ItemArray.adapt(contents);
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/command/BukkitCommand.java

@@ -1,71 +0,0 @@
-package net.william278.husksync.command;
-
-import net.william278.husksync.HuskSync;
-import net.william278.husksync.player.BukkitPlayer;
-import org.bukkit.command.*;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.Collections;
-import java.util.List;
-
-/**
- * Bukkit executor that implements and executes {@link CommandBase}s
- */
-public class BukkitCommand implements CommandExecutor, TabExecutor {
-
-    /**
-     * The {@link CommandBase} that will be executed
-     */
-    private final CommandBase command;
-
-    /**
-     * The implementing plugin
-     */
-    private final HuskSync plugin;
-
-    public BukkitCommand(@NotNull CommandBase command, @NotNull HuskSync implementor) {
-        this.command = command;
-        this.plugin = implementor;
-    }
-
-    /**
-     * Registers a {@link PluginCommand} to this implementation
-     *
-     * @param pluginCommand {@link PluginCommand} to register
-     */
-    public void register(@NotNull PluginCommand pluginCommand) {
-        pluginCommand.setExecutor(this);
-        pluginCommand.setTabCompleter(this);
-        pluginCommand.setPermission(command.permission);
-        pluginCommand.setDescription(command.getDescription());
-    }
-
-    @Override
-    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command,
-                             @NotNull String label, @NotNull String[] args) {
-        if (sender instanceof Player player) {
-            this.command.onExecute(BukkitPlayer.adapt(player), args);
-        } else {
-            if (this.command instanceof ConsoleExecutable consoleExecutable) {
-                consoleExecutable.onConsoleExecute(args);
-            } else {
-                plugin.getLocales().getLocale("error_in_game_command_only").
-                        ifPresent(locale -> sender.spigot().sendMessage(locale.toComponent()));
-            }
-        }
-        return true;
-    }
-
-    @Nullable
-    @Override
-    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command,
-                                      @NotNull String alias, @NotNull String[] args) {
-        if (this.command instanceof TabCompletable tabCompletable) {
-            return tabCompletable.onTabComplete(args);
-        }
-        return Collections.emptyList();
-    }
-
-}

bukkit/src/main/java/net/william278/husksync/command/BukkitCommandType.java

@@ -1,21 +0,0 @@
-package net.william278.husksync.command;
-
-import net.william278.husksync.BukkitHuskSync;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Commands available on the Bukkit HuskSync implementation
- */
-public enum BukkitCommandType {
-
-    HUSKSYNC_COMMAND(new HuskSyncCommand(BukkitHuskSync.getInstance())),
-    USERDATA_COMMAND(new UserDataCommand(BukkitHuskSync.getInstance())),
-    INVENTORY_COMMAND(new InventoryCommand(BukkitHuskSync.getInstance())),
-    ENDER_CHEST_COMMAND(new EnderChestCommand(BukkitHuskSync.getInstance()));
-
-    public final CommandBase commandBase;
-
-    BukkitCommandType(@NotNull CommandBase commandBase) {
-        this.commandBase = commandBase;
-    }
-}

bukkit/src/main/java/net/william278/husksync/data/BukkitData.java

@@ -0,0 +1,880 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.data;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.gson.annotations.SerializedName;
+import de.tr7zw.changeme.nbtapi.NBTCompound;
+import de.tr7zw.changeme.nbtapi.NBTPersistentDataContainer;
+import lombok.*;
+import net.william278.desertwell.util.ThrowingConsumer;
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.adapter.Adaptable;
+import net.william278.husksync.config.Settings.SynchronizationSettings.AttributeSettings;
+import net.william278.husksync.user.BukkitUser;
+import org.bukkit.*;
+import org.bukkit.advancement.AdvancementProgress;
+import org.bukkit.attribute.AttributeInstance;
+import org.bukkit.attribute.AttributeModifier;
+import org.bukkit.entity.EntityType;
+import org.bukkit.entity.Player;
+import org.bukkit.event.inventory.InventoryType;
+import org.bukkit.inventory.EquipmentSlotGroup;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.persistence.PersistentDataContainer;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Range;
+import org.jetbrains.annotations.Unmodifiable;
+
+import java.util.*;
+import java.util.logging.Level;
+import java.util.stream.Collectors;
+
+import static net.william278.husksync.util.BukkitKeyedAdapter.*;
+
+public abstract class BukkitData implements Data {
+
+    @Override
+    public final void apply(@NotNull UserDataHolder dataHolder, @NotNull HuskSync plugin) throws IllegalStateException {
+        this.apply((BukkitUser) dataHolder, (BukkitHuskSync) plugin);
+    }
+
+    public abstract void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException;
+
+    @Getter
+    public static abstract class Items extends BukkitData implements Data.Items {
+
+        private final @Nullable ItemStack @NotNull [] contents;
+
+        private Items(@Nullable ItemStack @NotNull [] contents) {
+            this.contents = Arrays.stream(contents.clone())
+                    .map(i -> i == null || i.getType() == Material.AIR ? null : i)
+                    .toArray(ItemStack[]::new);
+        }
+
+        @Nullable
+        @Override
+        public Stack @NotNull [] getStack() {
+            return Arrays.stream(contents)
+                    .map(stack -> stack != null ? new Stack(
+                            stack.getType().getKey().toString(),
+                            stack.getAmount(),
+                            stack.hasItemMeta() ? (Objects.requireNonNull(
+                                    stack.getItemMeta()).hasDisplayName() ? stack.getItemMeta().getDisplayName() : null)
+                                    : null,
+                            stack.hasItemMeta() ? (Objects.requireNonNull(
+                                    stack.getItemMeta()).hasLore() ? stack.getItemMeta().getLore() : null)
+                                    : null,
+                            stack.hasItemMeta() && Objects.requireNonNull(stack.getItemMeta()).hasEnchants() ?
+                                    stack.getItemMeta().getEnchants().keySet().stream()
+                                            .map(enchantment -> enchantment.getKey().getKey())
+                                            .toList()
+                                    : List.of()
+                    ) : null)
+                    .toArray(Stack[]::new);
+        }
+
+        @Override
+        public void clear() {
+            Arrays.fill(contents, null);
+        }
+
+        @Override
+        public void setContents(@NotNull Data.Items contents) {
+            this.setContents(((BukkitData.Items) contents).getContents());
+        }
+
+        public void setContents(@Nullable ItemStack @NotNull [] contents) {
+            // Ensure the array is the correct length for the inventory
+            if (contents.length != this.contents.length) {
+                contents = Arrays.copyOf(contents, this.contents.length);
+            }
+            System.arraycopy(contents, 0, this.contents, 0, this.contents.length);
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (obj instanceof BukkitData.Items items) {
+                return Arrays.equals(contents, items.getContents());
+            }
+            return false;
+        }
+
+        @Setter
+        @Getter
+        public static class Inventory extends BukkitData.Items implements Data.Items.Inventory {
+
+            @Range(from = 0, to = 8)
+            private int heldItemSlot;
+
+            private Inventory(@Nullable ItemStack @NotNull [] contents, int heldItemSlot) {
+                super(contents);
+                this.heldItemSlot = heldItemSlot;
+            }
+
+            @NotNull
+            public static BukkitData.Items.Inventory from(@Nullable ItemStack @NotNull [] contents, int heldItemSlot) {
+                return new BukkitData.Items.Inventory(contents, heldItemSlot);
+            }
+
+            @NotNull
+            public static BukkitData.Items.Inventory empty() {
+                return new BukkitData.Items.Inventory(new ItemStack[INVENTORY_SLOT_COUNT], 0);
+            }
+
+            @Override
+            public int getSlotCount() {
+                return INVENTORY_SLOT_COUNT;
+            }
+
+            @Override
+            public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+                final Player player = user.getPlayer();
+                this.clearInventoryCraftingSlots(player);
+                player.setItemOnCursor(null);
+                player.getInventory().setContents(plugin.setMapViews(getContents()));
+                player.getInventory().setHeldItemSlot(heldItemSlot);
+                //noinspection UnstableApiUsage
+                player.updateInventory();
+            }
+
+            private void clearInventoryCraftingSlots(@NotNull Player player) {
+                final org.bukkit.inventory.Inventory inventory = player.getOpenInventory().getTopInventory();
+                if (inventory.getType() == InventoryType.CRAFTING) {
+                    for (int slot = 0; slot < 5; slot++) {
+                        inventory.setItem(slot, null);
+                    }
+                }
+            }
+
+        }
+
+        public static class EnderChest extends BukkitData.Items implements Data.Items.EnderChest {
+
+            private EnderChest(@Nullable ItemStack @NotNull [] contents) {
+                super(contents);
+            }
+
+            @NotNull
+            public static BukkitData.Items.EnderChest adapt(@Nullable ItemStack @NotNull [] contents) {
+                return new BukkitData.Items.EnderChest(contents);
+            }
+
+            @NotNull
+            public static BukkitData.Items.EnderChest adapt(@NotNull Collection<ItemStack> items) {
+                return adapt(items.toArray(ItemStack[]::new));
+            }
+
+            @NotNull
+            public static BukkitData.Items.EnderChest empty() {
+                return new BukkitData.Items.EnderChest(new ItemStack[ENDER_CHEST_SLOT_COUNT]);
+            }
+
+            @Override
+            public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+                ItemStack[] fullContents = plugin.setMapViews(getContents());
+                ItemStack[] enderChestContents = Arrays.copyOf(fullContents, Math.min(fullContents.length, user.getPlayer().getEnderChest().getSize()));
+                user.getPlayer().getEnderChest().setContents(enderChestContents);
+            }
+
+        }
+
+        public static class ItemArray extends BukkitData.Items implements Data.Items {
+
+            private ItemArray(@Nullable ItemStack @NotNull [] contents) {
+                super(contents);
+            }
+
+            @NotNull
+            public static ItemArray adapt(@NotNull Collection<ItemStack> drops) {
+                return new ItemArray(drops.toArray(ItemStack[]::new));
+            }
+
+            @NotNull
+            public static ItemArray adapt(@Nullable ItemStack @NotNull [] drops) {
+                return new ItemArray(drops);
+            }
+
+            @Override
+            public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+                throw new UnsupportedOperationException("A generic item array cannot be applied to a player");
+            }
+
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class PotionEffects extends BukkitData implements Data.PotionEffects {
+
+        private final Collection<PotionEffect> effects;
+
+        @NotNull
+        public static BukkitData.PotionEffects from(@NotNull Collection<PotionEffect> sei) {
+            return new BukkitData.PotionEffects(Lists.newArrayList(sei.stream().filter(e -> !e.isAmbient()).toList()));
+
+        }
+
+        @NotNull
+        public static BukkitData.PotionEffects adapt(@NotNull Collection<Effect> effects) {
+            return from(effects.stream()
+                    .map(effect -> {
+                        final PotionEffectType type = matchEffectType(effect.type());
+                        return type != null ? new PotionEffect(
+                                type,
+                                effect.duration(),
+                                effect.amplifier(),
+                                effect.isAmbient(),
+                                effect.showParticles(),
+                                effect.hasIcon()
+                        ) : null;
+                    })
+                    .filter(Objects::nonNull)
+                    .toList());
+        }
+
+        @NotNull
+        @SuppressWarnings("unused")
+        public static BukkitData.PotionEffects empty() {
+            return new BukkitData.PotionEffects(Lists.newArrayList());
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            final Player player = user.getPlayer();
+            for (PotionEffect effect : player.getActivePotionEffects()) {
+                player.removePotionEffect(effect.getType());
+            }
+            for (PotionEffect effect : this.getEffects()) {
+                player.addPotionEffect(effect);
+            }
+        }
+
+        @NotNull
+        @Override
+        @Unmodifiable
+        public List<Effect> getActiveEffects() {
+            return effects.stream()
+                    .map(potionEffect -> new Effect(
+                            potionEffect.getType().getKey().toString(),
+                            potionEffect.getAmplifier(),
+                            potionEffect.getDuration(),
+                            potionEffect.isAmbient(),
+                            potionEffect.hasParticles(),
+                            potionEffect.hasIcon()
+                    ))
+                    .toList();
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Advancements extends BukkitData implements Data.Advancements {
+
+        private List<Advancement> completed;
+
+        // Iterate through the server advancement set and add all advancements to the list
+        @NotNull
+        public static BukkitData.Advancements adapt(@NotNull Player player) {
+            final List<Advancement> advancements = Lists.newArrayList();
+            forEachAdvancement(advancement -> {
+                final AdvancementProgress advancementProgress = player.getAdvancementProgress(advancement);
+                final Map<String, Date> awardedCriteria = Maps.newHashMap();
+
+                advancementProgress.getAwardedCriteria().forEach(criteriaKey -> awardedCriteria.put(criteriaKey,
+                        advancementProgress.getDateAwarded(criteriaKey)));
+
+                // Only save the advancement if criteria has been completed
+                if (!awardedCriteria.isEmpty()) {
+                    advancements.add(Advancement.adapt(advancement.getKey().toString(), awardedCriteria));
+                }
+            });
+            return new BukkitData.Advancements(advancements);
+        }
+
+        @NotNull
+        public static BukkitData.Advancements from(@NotNull List<Advancement> advancements) {
+            return new BukkitData.Advancements(advancements);
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            plugin.runAsync(() -> forEachAdvancement(advancement -> {
+                final Player player = user.getPlayer();
+                final AdvancementProgress progress = player.getAdvancementProgress(advancement);
+                final Optional<Advancement> record = completed.stream()
+                        .filter(r -> r.getKey().equals(advancement.getKey().toString()))
+                        .findFirst();
+                if (record.isEmpty()) {
+                    this.setAdvancement(plugin, advancement, player, user, List.of(), progress.getAwardedCriteria());
+                    return;
+                }
+
+                final Map<String, Date> criteria = record.get().getCompletedCriteria();
+                this.setAdvancement(
+                        plugin, advancement, player, user,
+                        criteria.keySet().stream().filter(key -> !progress.getAwardedCriteria().contains(key)).toList(),
+                        progress.getAwardedCriteria().stream().filter(key -> !criteria.containsKey(key)).toList()
+                );
+            }));
+        }
+
+        private void setAdvancement(@NotNull HuskSync plugin,
+                                    @NotNull org.bukkit.advancement.Advancement advancement,
+                                    @NotNull Player player,
+                                    @NotNull BukkitUser user,
+                                    @NotNull Collection<String> toAward,
+                                    @NotNull Collection<String> toRevoke) {
+            plugin.runSync(() -> {
+                // Track player exp level & progress
+                final int expLevel = player.getLevel();
+                final float expProgress = player.getExp();
+
+                // Award and revoke advancement criteria
+                final AdvancementProgress progress = player.getAdvancementProgress(advancement);
+                toAward.forEach(progress::awardCriteria);
+                toRevoke.forEach(progress::revokeCriteria);
+
+                // Set player experience and level (prevent advancement awards applying twice), reset game rule
+                if (!toAward.isEmpty()
+                        && (player.getLevel() != expLevel || player.getExp() != expProgress)) {
+                    player.setLevel(expLevel);
+                    player.setExp(expProgress);
+                }
+            }, user);
+        }
+
+        // Performs a consuming function for every advancement registered on the server
+        private static void forEachAdvancement(@NotNull ThrowingConsumer<org.bukkit.advancement.Advancement> consumer) {
+            Bukkit.getServer().advancementIterator().forEachRemaining(consumer);
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Location extends BukkitData implements Data.Location, Adaptable {
+
+        @SerializedName("x")
+        private double x;
+        @SerializedName("y")
+        private double y;
+        @SerializedName("z")
+        private double z;
+        @SerializedName("yaw")
+        private float yaw;
+        @SerializedName("pitch")
+        private float pitch;
+        @SerializedName("world")
+        private World world;
+
+        @NotNull
+        public static BukkitData.Location from(double x, double y, double z,
+                                               float yaw, float pitch, @NotNull World world) {
+            return new BukkitData.Location(x, y, z, yaw, pitch, world);
+        }
+
+        @NotNull
+        public static BukkitData.Location adapt(@NotNull org.bukkit.Location location) {
+            return from(
+                    location.getX(),
+                    location.getY(),
+                    location.getZ(),
+                    location.getYaw(),
+                    location.getPitch(),
+                    new World(
+                            Objects.requireNonNull(location.getWorld(), "World is null").getName(),
+                            location.getWorld().getUID(),
+                            location.getWorld().getEnvironment().name()
+                    )
+            );
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            try {
+                final org.bukkit.Location location = new org.bukkit.Location(
+                        Bukkit.getWorld(world.name()), x, y, z, yaw, pitch
+                );
+                user.getPlayer().teleport(location);
+            } catch (Throwable e) {
+                throw new IllegalStateException("Failed to apply location", e);
+            }
+        }
+
+    }
+
+    @Getter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Statistics extends BukkitData implements Data.Statistics, Adaptable {
+
+        @SerializedName("generic")
+        private Map<String, Integer> genericStatistics;
+        @SerializedName("blocks")
+        private Map<String, Map<String, Integer>> blockStatistics;
+        @SerializedName("items")
+        private Map<String, Map<String, Integer>> itemStatistics;
+        @SerializedName("entities")
+        private Map<String, Map<String, Integer>> entityStatistics;
+
+        @NotNull
+        public static BukkitData.Statistics adapt(@NotNull Player player) {
+            final Map<String, Integer> generic = Maps.newHashMap();
+            final Map<String, Map<String, Integer>> blocks = Maps.newHashMap(),
+                    items = Maps.newHashMap(), entities = Maps.newHashMap();
+            Registry.STATISTIC.forEach(id -> {
+                switch (id.getType()) {
+                    case UNTYPED -> addStatistic(player, id, generic);
+                    // Todo - Future - Use BLOCK and ITEM registries when API stabilizes
+                    case BLOCK -> addStatistic(player, id, Registry.MATERIAL, blocks);
+                    case ITEM -> addStatistic(player, id, Registry.MATERIAL, items);
+                    case ENTITY -> addStatistic(player, id, Registry.ENTITY_TYPE, entities);
+                }
+            });
+            return new BukkitData.Statistics(generic, blocks, items, entities);
+        }
+
+        @NotNull
+        public static BukkitData.Statistics from(@NotNull Map<String, Integer> generic,
+                                                 @NotNull Map<String, Map<String, Integer>> blocks,
+                                                 @NotNull Map<String, Map<String, Integer>> items,
+                                                 @NotNull Map<String, Map<String, Integer>> entities) {
+            return new BukkitData.Statistics(generic, blocks, items, entities);
+        }
+
+        private static void addStatistic(@NotNull Player p, @NotNull Statistic id, @NotNull Map<String, Integer> map) {
+            final int stat = p.getStatistic(id);
+            if (stat != 0) {
+                map.put(id.getKey().getKey(), stat);
+            }
+        }
+
+        private static <R extends Keyed> void addStatistic(@NotNull Player p, @NotNull Statistic id,
+                                                           @NotNull Registry<R> registry,
+                                                           @NotNull Map<String, Map<String, Integer>> map) {
+            registry.forEach(i -> {
+                try {
+                    int stat = 0;
+                    if (i instanceof Material mat && ((id.getType() == Statistic.Type.BLOCK && mat.isBlock())
+                            || (id.getType() == Statistic.Type.ITEM && mat.isItem()))) {
+                        stat = p.getStatistic(id, mat);
+                    } else if (i instanceof EntityType ent && id.getType() == Statistic.Type.ENTITY) {
+                        stat = p.getStatistic(id, ent);
+                    }
+                    if (stat != 0) {
+                        map.compute(id.getKey().getKey(), (k, v) -> v == null ? Maps.newHashMap() : v)
+                                .put(i.getKey().getKey(), stat);
+                    }
+                } catch (IllegalStateException ignored) {
+                }
+            });
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync p) {
+            genericStatistics.forEach((k, v) -> applyStat(p, user, k, Statistic.Type.UNTYPED, v));
+            blockStatistics.forEach((k, m) -> m.forEach((b, v) -> applyStat(p, user, k, Statistic.Type.BLOCK, v, b)));
+            itemStatistics.forEach((k, m) -> m.forEach((i, v) -> applyStat(p, user, k, Statistic.Type.ITEM, v, i)));
+            entityStatistics.forEach((k, m) -> m.forEach((e, v) -> applyStat(p, user, k, Statistic.Type.ENTITY, v, e)));
+        }
+
+        private void applyStat(@NotNull HuskSync plugin, @NotNull UserDataHolder user, @NotNull String id,
+                               @NotNull Statistic.Type type, int value, @NotNull String... key) {
+            final Player player = ((BukkitUser) user).getPlayer();
+            final Statistic stat = matchStatistic(id);
+            if (stat == null) {
+                return;
+            }
+
+            try {
+                switch (type) {
+                    case UNTYPED -> player.setStatistic(stat, value);
+                    case BLOCK, ITEM -> {
+                        Material material = matchMaterial(key.length > 0 ? key[0] : null);
+                        if (material != null) {
+                            player.setStatistic(stat, material, value);
+                        }
+                    }
+                    case ENTITY -> {
+                        EntityType entity = matchEntityType(key.length > 0 ? key[0] : null);
+                        if (entity != null) {
+                            player.setStatistic(stat, entity, value);
+                        }
+                    }
+                }
+            } catch (Throwable a) {
+                plugin.log(Level.WARNING, "Failed to apply statistic " + id, a);
+            }
+        }
+
+    }
+
+    @Getter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class PersistentData extends BukkitData implements Data.PersistentData {
+        private final NBTCompound persistentData;
+
+        @NotNull
+        public static BukkitData.PersistentData adapt(@NotNull PersistentDataContainer persistentData) {
+            return new BukkitData.PersistentData(new NBTPersistentDataContainer(persistentData));
+        }
+
+        @NotNull
+        public static BukkitData.PersistentData from(@NotNull NBTCompound compound) {
+            return new BukkitData.PersistentData(compound);
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            final NBTPersistentDataContainer container = new NBTPersistentDataContainer(
+                    user.getPlayer().getPersistentDataContainer()
+            );
+            container.clearNBT();
+            container.mergeCompound(persistentData);
+        }
+
+    }
+
+    @Getter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    @SuppressWarnings("UnstableApiUsage")
+    public static class Attributes extends BukkitData implements Data.Attributes, Adaptable {
+
+        private List<Attribute> attributes;
+
+        @NotNull
+        public static BukkitData.Attributes adapt(@NotNull Player player, @NotNull HuskSync plugin) {
+            if (!Bukkit.isPrimaryThread()) {
+                try {
+                    return Bukkit.getScheduler().callSyncMethod((Plugin) plugin, () -> adapt(player, plugin)).get();
+                } catch (Exception e) {
+                    throw new IllegalStateException("Failed to adapt attributes on main thread", e);
+                }
+            }
+
+            final List<Attribute> attributes = Lists.newArrayList();
+            final AttributeSettings settings = plugin.getSettings().getSynchronization().getAttributes();
+            Registry.ATTRIBUTE.forEach(id -> {
+                final AttributeInstance instance = player.getAttribute(id);
+                if (settings.isIgnoredAttribute(id.getKey().toString()) || instance == null) {
+                    return; // We don't sync attributes not marked as to be synced
+                }
+                attributes.add(adapt(instance, settings));
+            });
+            return new BukkitData.Attributes(attributes);
+        }
+
+        public Optional<Attribute> getAttribute(@NotNull org.bukkit.attribute.Attribute id) {
+            return attributes.stream().filter(attribute -> attribute.name().equals(id.getKey().toString())).findFirst();
+        }
+
+        @SuppressWarnings("unused")
+        public Optional<Attribute> getAttribute(@NotNull String key) {
+            final org.bukkit.attribute.Attribute attribute = matchAttribute(key);
+            if (attribute == null) {
+                return Optional.empty();
+            }
+            return getAttribute(attribute);
+        }
+
+        @NotNull
+        private static Attribute adapt(@NotNull AttributeInstance instance, @NotNull AttributeSettings settings) {
+            return new Attribute(
+                    instance.getAttribute().getKey().toString(),
+                    instance.getBaseValue(),
+                    instance.getModifiers().stream()
+                            .filter(modifier -> !settings.isIgnoredModifier(modifier.getName()))
+                            .filter(modifier -> modifier.getSlotGroup() != EquipmentSlotGroup.ANY)
+                            .map(BukkitData.Attributes::adapt).collect(Collectors.toSet())
+            );
+        }
+
+        @NotNull
+        private static Modifier adapt(@NotNull AttributeModifier modifier) {
+            return new Modifier(
+                    modifier.getKey().toString(),
+                    modifier.getAmount(),
+                    modifier.getOperation().ordinal(),
+                    modifier.getSlotGroup().toString()
+            );
+        }
+
+        private static void applyAttribute(@Nullable AttributeInstance instance, @Nullable Attribute attribute) {
+            if (instance == null) {
+                return;
+            }
+            instance.getModifiers().forEach(instance::removeModifier);
+            instance.setBaseValue(attribute == null ? instance.getValue() : attribute.baseValue());
+            if (attribute != null) {
+                attribute.modifiers().stream()
+                        .filter(mod -> instance.getModifiers().stream().map(AttributeModifier::getName)
+                                .noneMatch(n -> n.equals(mod.name())))
+                        .distinct().filter(mod -> !mod.hasUuid())
+                        .forEach(mod -> instance.addModifier(adapt(mod)));
+            }
+        }
+
+        @NotNull
+        private static AttributeModifier adapt(@NotNull Modifier modifier) {
+            return new AttributeModifier(
+                    Objects.requireNonNull(NamespacedKey.fromString(modifier.name())),
+                    modifier.amount(),
+                    AttributeModifier.Operation.values()[modifier.operation()],
+                    Optional.ofNullable(EquipmentSlotGroup.getByName(modifier.slotGroup())).orElse(EquipmentSlotGroup.ANY)
+            );
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            if (!Bukkit.isPrimaryThread()) {
+                try {
+                    Bukkit.getScheduler().callSyncMethod(plugin, () -> { this.apply(user, plugin); return null; }).get();
+                    return;
+                } catch (Exception e) {
+                    throw new IllegalStateException("Failed to apply attributes on main thread", e);
+                }
+            }
+
+            final AttributeSettings settings = plugin.getSettings().getSynchronization().getAttributes();
+            Registry.ATTRIBUTE.forEach(id -> {
+                if (settings.isIgnoredAttribute(id.getKey().toString())) {
+                    return;
+                }
+                applyAttribute(user.getPlayer().getAttribute(id), getAttribute(id).orElse(null));
+            });
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Health extends BukkitData implements Data.Health, Adaptable {
+        @SerializedName("health")
+        private double health;
+        @SerializedName("health_scale")
+        private double healthScale;
+        @SerializedName("is_health_scaled")
+        private boolean isHealthScaled;
+
+        @NotNull
+        public static BukkitData.Health from(double health, double scale, boolean isScaled) {
+            return new BukkitData.Health(health, scale, isScaled);
+        }
+
+        /**
+         * @deprecated Use {@link #from(double, double, boolean)} instead
+         */
+        @NotNull
+        @Deprecated(since = "3.5.4")
+        public static BukkitData.Health from(double health, double scale) {
+            return from(health, scale, false);
+        }
+
+        /**
+         * @deprecated Use {@link #from(double, double, boolean)} instead
+         */
+        @NotNull
+        @Deprecated(forRemoval = true, since = "3.5")
+        public static BukkitData.Health from(double health, @SuppressWarnings("unused") double max, double scale) {
+            return from(health, scale, false);
+        }
+
+        @NotNull
+        public static BukkitData.Health adapt(@NotNull Player player) {
+            return from(
+                    player.getHealth(),
+                    player.getHealthScale(),
+                    player.isHealthScaled()
+            );
+        }
+
+        @Override
+        @SuppressWarnings("deprecation")
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            final Player player = user.getPlayer();
+
+            // Set health
+            try {
+                player.setHealth(Math.min(health, player.getMaxHealth()));
+            } catch (Throwable e) {
+                plugin.log(Level.WARNING, "Error setting %s's health to %s".formatted(player.getName(), health), e);
+            }
+
+            // Set health scale
+            double scale = healthScale <= 0 ? player.getMaxHealth() : healthScale;
+            try {
+                player.setHealthScale(scale);
+                player.setHealthScaled(isHealthScaled);
+            } catch (Throwable e) {
+                plugin.log(Level.WARNING, "Error setting %s's health scale to %s".formatted(player.getName(), scale), e);
+            }
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Hunger extends BukkitData implements Data.Hunger, Adaptable {
+
+        @SerializedName("food_level")
+        private int foodLevel;
+        @SerializedName("saturation")
+        private float saturation;
+        @SerializedName("exhaustion")
+        private float exhaustion;
+
+        @NotNull
+        public static BukkitData.Hunger adapt(@NotNull Player player) {
+            return from(player.getFoodLevel(), player.getSaturation(), player.getExhaustion());
+        }
+
+        @NotNull
+        public static BukkitData.Hunger from(int foodLevel, float saturation, float exhaustion) {
+            return new BukkitData.Hunger(foodLevel, saturation, exhaustion);
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            final Player player = user.getPlayer();
+            player.setFoodLevel(foodLevel);
+            player.setSaturation(saturation);
+            player.setExhaustion(exhaustion);
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Experience extends BukkitData implements Data.Experience, Adaptable {
+
+        @SerializedName("total_experience")
+        private int totalExperience;
+
+        @SerializedName("exp_level")
+        private int expLevel;
+
+        @SerializedName("exp_progress")
+        private float expProgress;
+
+        @NotNull
+        public static BukkitData.Experience from(int totalExperience, int expLevel, float expProgress) {
+            return new BukkitData.Experience(totalExperience, expLevel, expProgress);
+        }
+
+        @NotNull
+        public static BukkitData.Experience adapt(@NotNull Player player) {
+            return from(player.getTotalExperience(), player.getLevel(), player.getExp());
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            final Player player = user.getPlayer();
+            player.setTotalExperience(totalExperience);
+            player.setLevel(expLevel);
+            player.setExp(expProgress);
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class GameMode extends BukkitData implements Data.GameMode, Adaptable {
+
+        @SerializedName("game_mode")
+        private String gameMode;
+
+        @NotNull
+        public static BukkitData.GameMode from(@NotNull String gameMode) {
+            return new BukkitData.GameMode(gameMode);
+        }
+
+        @NotNull
+        @Deprecated(forRemoval = true, since = "3.5")
+        @SuppressWarnings("unused")
+        public static BukkitData.GameMode from(@NotNull String gameMode, boolean allowFlight, boolean isFlying) {
+            return new BukkitData.GameMode(gameMode);
+        }
+
+        @NotNull
+        public static BukkitData.GameMode adapt(@NotNull Player player) {
+            return from(player.getGameMode().name());
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            user.getPlayer().setGameMode(org.bukkit.GameMode.valueOf(gameMode));
+        }
+
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class FlightStatus extends BukkitData implements Data.FlightStatus, Adaptable {
+
+        @SerializedName("allow_flight")
+        private boolean allowFlight;
+        @SerializedName("is_flying")
+        private boolean flying;
+
+        @NotNull
+        public static BukkitData.FlightStatus from(boolean allowFlight, boolean flying) {
+            return new BukkitData.FlightStatus(allowFlight, allowFlight && flying);
+        }
+
+        @NotNull
+        public static BukkitData.FlightStatus adapt(@NotNull Player player) {
+            return from(player.getAllowFlight(), player.isFlying());
+        }
+
+        @Override
+        public void apply(@NotNull BukkitUser user, @NotNull BukkitHuskSync plugin) throws IllegalStateException {
+            final Player player = user.getPlayer();
+            player.setAllowFlight(allowFlight);
+            player.setFlying(allowFlight && flying);
+        }
+
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/data/BukkitInventoryMap.java

@@ -1,126 +0,0 @@
-package net.william278.husksync.data;
-
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Optional;
-
-/**
- * A mapped player inventory, providing methods to easily access a player's inventory.
- */
-@SuppressWarnings("unused")
-public class BukkitInventoryMap {
-
-    private ItemStack[] contents;
-
-    /**
-     * Creates a new mapped inventory from the given contents.
-     *
-     * @param contents the contents of the inventory
-     */
-    protected BukkitInventoryMap(ItemStack[] contents) {
-        this.contents = contents;
-    }
-
-    /**
-     * Gets the contents of the inventory.
-     *
-     * @return the contents of the inventory
-     */
-    public ItemStack[] getContents() {
-        return contents;
-    }
-
-    /**
-     * Set the contents of the inventory.
-     *
-     * @param contents the contents of the inventory
-     */
-    public void setContents(ItemStack[] contents) {
-        this.contents = contents;
-    }
-
-    /**
-     * Gets the size of the inventory.
-     *
-     * @return the size of the inventory
-     */
-    public int getSize() {
-        return contents.length;
-    }
-
-    /**
-     * Gets the item at the given index.
-     *
-     * @param index the index of the item to get
-     * @return the item at the given index
-     */
-    public Optional<ItemStack> getItemAt(int index) {
-        if (contents.length >= index) {
-            if (contents[index] == null) {
-                return Optional.empty();
-            }
-            return Optional.of(contents[index]);
-        }
-        return Optional.empty();
-    }
-
-    /**
-     * Sets the item at the given index.
-     *
-     * @param itemStack the item to set at the given index
-     * @param index     the index of the item to set
-     * @throws IllegalArgumentException if the index is out of bounds
-     */
-    public void setItemAt(@NotNull ItemStack itemStack, int index) throws IllegalArgumentException {
-        contents[index] = itemStack;
-    }
-
-    /**
-     * Returns the main inventory contents.
-     *
-     * @return the main inventory contents
-     */
-    public ItemStack[] getInventory() {
-        final ItemStack[] inventory = new ItemStack[36];
-        System.arraycopy(contents, 0, inventory, 0, Math.min(contents.length, inventory.length));
-        return inventory;
-    }
-
-    public ItemStack[] getHotbar() {
-        final ItemStack[] armor = new ItemStack[9];
-        for (int i = 0; i <= 9; i++) {
-            armor[i] = getItemAt(i).orElse(null);
-        }
-        return armor;
-    }
-
-    public Optional<ItemStack> getOffHand() {
-        return getItemAt(40);
-    }
-
-    public Optional<ItemStack> getHelmet() {
-        return getItemAt(39);
-    }
-
-    public Optional<ItemStack> getChestplate() {
-        return getItemAt(38);
-    }
-
-    public Optional<ItemStack> getLeggings() {
-        return getItemAt(37);
-    }
-
-    public Optional<ItemStack> getBoots() {
-        return getItemAt(36);
-    }
-
-    public ItemStack[] getArmor() {
-        final ItemStack[] armor = new ItemStack[4];
-        for (int i = 36; i < 40; i++) {
-            armor[i - 36] = getItemAt(i).orElse(null);
-        }
-        return armor;
-    }
-
-}

bukkit/src/main/java/net/william278/husksync/data/BukkitSerializer.java

@@ -1,218 +1,250 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.data;
 
+import com.google.gson.reflect.TypeToken;
+import de.tr7zw.changeme.nbtapi.NBT;
+import de.tr7zw.changeme.nbtapi.NBTCompound;
+import de.tr7zw.changeme.nbtapi.NBTContainer;
+import de.tr7zw.changeme.nbtapi.iface.ReadWriteNBT;
+import de.tr7zw.changeme.nbtapi.iface.ReadWriteNBTCompoundList;
+import de.tr7zw.changeme.nbtapi.utils.DataFixerUtil;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import net.william278.desertwell.util.Version;
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.adapter.Adaptable;
+import net.william278.husksync.api.HuskSyncAPI;
+import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.potion.PotionEffect;
-import org.bukkit.util.io.BukkitObjectInputStream;
-import org.bukkit.util.io.BukkitObjectOutputStream;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
-import org.yaml.snakeyaml.external.biz.base64Coder.Base64Coder;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.util.Map;
-import java.util.concurrent.CompletableFuture;
+import java.util.List;
 
+import static net.william278.husksync.data.BukkitData.Items.Inventory.INVENTORY_SLOT_COUNT;
+import static net.william278.husksync.data.Data.Items.Inventory.HELD_ITEM_SLOT_TAG;
+import static net.william278.husksync.data.Data.Items.Inventory.ITEMS_TAG;
+
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
 public class BukkitSerializer {
 
-    /**
-     * Returns a serialized array of {@link ItemStack}s
-     *
-     * @param inventoryContents The contents of the inventory
-     * @return The serialized inventory contents
-     */
-    public static CompletableFuture<String> serializeItemStackArray(@NotNull ItemStack[] inventoryContents)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> {
-            // Return an empty string if there is no inventory item data to serialize
-            if (inventoryContents.length == 0) {
-                return "";
+    protected final HuskSync plugin;
+
+    @SuppressWarnings("unused")
+    public BukkitSerializer(@NotNull HuskSyncAPI api) {
+        this.plugin = api.getPlugin();
+    }
+
+    @ApiStatus.Internal
+    @NotNull
+    public HuskSync getPlugin() {
+        return plugin;
+    }
+
+    public static class Inventory extends BukkitSerializer implements Serializer<BukkitData.Items.Inventory>,
+            ItemDeserializer {
+
+        public Inventory(@NotNull HuskSync plugin) {
+            super(plugin);
+        }
+
+        @Override
+        public BukkitData.Items.Inventory deserialize(@NotNull String serialized, @NotNull Version dataMcVersion)
+                throws DeserializationException {
+            final ReadWriteNBT root = NBT.parseNBT(serialized);
+            final ReadWriteNBT items = root.hasTag(ITEMS_TAG) ? root.getCompound(ITEMS_TAG) : null;
+            return BukkitData.Items.Inventory.from(
+                    items != null ? getItems(items, dataMcVersion) : new ItemStack[INVENTORY_SLOT_COUNT],
+                    root.hasTag(HELD_ITEM_SLOT_TAG) ? root.getInteger(HELD_ITEM_SLOT_TAG) : 0
+            );
+        }
+
+        @Override
+        public BukkitData.Items.Inventory deserialize(@NotNull String serialized) {
+            return deserialize(serialized, plugin.getMinecraftVersion());
+        }
+
+        @NotNull
+        @Override
+        public String serialize(@NotNull BukkitData.Items.Inventory data) throws SerializationException {
+            final ReadWriteNBT root = NBT.createNBTObject();
+            root.setItemStackArray(ITEMS_TAG, data.getContents());
+            root.setInteger(HELD_ITEM_SLOT_TAG, data.getHeldItemSlot());
+            return root.toString();
+        }
+
+    }
+
+    public static class EnderChest extends BukkitSerializer implements Serializer<BukkitData.Items.EnderChest>,
+            ItemDeserializer {
+
+        public EnderChest(@NotNull HuskSync plugin) {
+            super(plugin);
+        }
+
+        @Override
+        public BukkitData.Items.EnderChest deserialize(@NotNull String serialized, @NotNull Version dataMcVersion)
+                throws DeserializationException {
+            final ItemStack[] items = getItems(NBT.parseNBT(serialized), dataMcVersion);
+            return items == null ? BukkitData.Items.EnderChest.empty() : BukkitData.Items.EnderChest.adapt(items);
+        }
+
+        @Override
+        public BukkitData.Items.EnderChest deserialize(@NotNull String serialized) {
+            return deserialize(serialized, plugin.getMinecraftVersion());
+        }
+
+        @NotNull
+        @Override
+        public String serialize(@NotNull BukkitData.Items.EnderChest data) throws SerializationException {
+            return NBT.itemStackArrayToNBT(data.getContents()).toString();
+        }
+    }
+
+    // Utility interface for deserializing and upgrading item stacks from legacy versions
+    private interface ItemDeserializer {
+
+        @Nullable
+        default ItemStack[] getItems(@NotNull ReadWriteNBT tag, @NotNull Version mcVersion) {
+            if (mcVersion.compareTo(getPlugin().getMinecraftVersion()) < 0) {
+                return upgradeItemStacks((NBTCompound) tag, mcVersion);
             }
+            return NBT.itemStackArrayFromNBT(tag);
+        }
 
-            // Create an output stream that will be encoded into base 64
-            ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
-
-            try (BukkitObjectOutputStream bukkitOutputStream = new BukkitObjectOutputStream(byteOutputStream)) {
-                // Define the length of the inventory array to serialize
-                bukkitOutputStream.writeInt(inventoryContents.length);
-
-                // Write each serialize each ItemStack to the output stream
-                for (ItemStack inventoryItem : inventoryContents) {
-                    bukkitOutputStream.writeObject(serializeItemStack(inventoryItem));
+        @NotNull
+        private ItemStack @NotNull [] upgradeItemStacks(@NotNull NBTCompound itemsNbt, @NotNull Version mcVersion) {
+            final ReadWriteNBTCompoundList items = itemsNbt.getCompoundList("items");
+            final ItemStack[] itemStacks = new ItemStack[itemsNbt.getInteger("size")];
+            for (int i = 0; i < items.size(); i++) {
+                if (items.get(i) == null) {
+                    itemStacks[i] = new ItemStack(Material.AIR);
+                    continue;
                 }
-
-                // Return encoded data, using the encoder from SnakeYaml to get a ByteArray conversion
-                return Base64Coder.encodeLines(byteOutputStream.toByteArray());
-            } catch (IOException e) {
-                throw new DataSerializationException("Failed to serialize item stack data", e);
-            }
-        });
-    }
-
-    /**
-     * Returns a {@link BukkitInventoryMap} from a serialized array of ItemStacks representing the contents of a player's inventory.
-     *
-     * @param serializedPlayerInventory The serialized {@link ItemStack} inventory array
-     * @return The deserialized ItemStacks, mapped for convenience as a {@link BukkitInventoryMap}
-     * @throws DataSerializationException If the serialized item stack array could not be deserialized
-     */
-    public static CompletableFuture<BukkitInventoryMap> deserializeInventory(@NotNull String serializedPlayerInventory)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> new BukkitInventoryMap(deserializeItemStackArray(serializedPlayerInventory).join()));
-    }
-
-    /**
-     * Returns an array of ItemStacks from serialized inventory data.
-     *
-     * @param serializeItemStackArray The serialized {@link ItemStack} array
-     * @return The deserialized array of {@link ItemStack}s
-     * @throws DataSerializationException If the serialized item stack array could not be deserialized
-     * @implNote Empty slots will be represented by {@code null}
-     */
-    public static CompletableFuture<ItemStack[]> deserializeItemStackArray(@NotNull String serializeItemStackArray)
-            throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> {
-            // Return empty array if there is no inventory data (set the player as having an empty inventory)
-            if (serializeItemStackArray.isEmpty()) {
-                return new ItemStack[0];
-            }
-
-            // Create a byte input stream to read the serialized data
-            try (ByteArrayInputStream byteInputStream = new ByteArrayInputStream(Base64Coder.decodeLines(serializeItemStackArray))) {
-                try (BukkitObjectInputStream bukkitInputStream = new BukkitObjectInputStream(byteInputStream)) {
-                    // Read the length of the Bukkit input stream and set the length of the array to this value
-                    ItemStack[] inventoryContents = new ItemStack[bukkitInputStream.readInt()];
-
-                    // Set the ItemStacks in the array from deserialized ItemStack data
-                    int slotIndex = 0;
-                    for (ItemStack ignored : inventoryContents) {
-                        inventoryContents[slotIndex] = deserializeItemStack(bukkitInputStream.readObject());
-                        slotIndex++;
-                    }
-
-                    // Return the finished, serialized inventory contents
-                    return inventoryContents;
+                try {
+                    itemStacks[i] = NBT.itemStackFromNBT(upgradeItemData(items.get(i), mcVersion));
+                } catch (Throwable e) {
+                    itemStacks[i] = new ItemStack(Material.AIR);
                 }
-            } catch (IOException | ClassNotFoundException e) {
-                throw new DataSerializationException("Failed to deserialize item stack data", e);
             }
-        });
+            return itemStacks;
+        }
+
+        @NotNull
+        private ReadWriteNBT upgradeItemData(@NotNull ReadWriteNBT tag, @NotNull Version mcVersion)
+                throws NoSuchFieldException, IllegalAccessException {
+            return DataFixerUtil.fixUpItemData(
+                    tag,
+                    getPlugin().getDataVersion(mcVersion),
+                    DataFixerUtil.getCurrentVersion()
+            );
+        }
+
+        @NotNull
+        HuskSync getPlugin();
+    }
+
+    public static class PotionEffects extends BukkitSerializer implements Serializer<BukkitData.PotionEffects> {
+
+        private static final TypeToken<List<Data.PotionEffects.Effect>> TYPE = new TypeToken<>() {
+        };
+
+        public PotionEffects(@NotNull HuskSync plugin) {
+            super(plugin);
+        }
+
+        @Override
+        public BukkitData.PotionEffects deserialize(@NotNull String serialized) throws DeserializationException {
+            return BukkitData.PotionEffects.adapt(
+                    plugin.getGson().fromJson(serialized, TYPE.getType())
+            );
+        }
+
+        @NotNull
+        @Override
+        public String serialize(@NotNull BukkitData.PotionEffects element) throws SerializationException {
+            return plugin.getGson().toJson(element.getActiveEffects());
+        }
+
+    }
+
+    public static class Advancements extends BukkitSerializer implements Serializer<BukkitData.Advancements> {
+
+        private static final TypeToken<List<Data.Advancements.Advancement>> TYPE = new TypeToken<>() {
+        };
+
+        public Advancements(@NotNull HuskSync plugin) {
+            super(plugin);
+        }
+
+        @Override
+        public BukkitData.Advancements deserialize(@NotNull String serialized) throws DeserializationException {
+            return BukkitData.Advancements.from(
+                    plugin.getGson().fromJson(serialized, TYPE.getType())
+            );
+        }
+
+        @NotNull
+        @Override
+        public String serialize(@NotNull BukkitData.Advancements element) throws SerializationException {
+            return plugin.getGson().toJson(element.getCompleted());
+        }
+    }
+
+    public static class PersistentData extends BukkitSerializer implements Serializer<BukkitData.PersistentData> {
+
+        public PersistentData(@NotNull HuskSync plugin) {
+            super(plugin);
+        }
+
+        @Override
+        public BukkitData.PersistentData deserialize(@NotNull String serialized) throws DeserializationException {
+            return BukkitData.PersistentData.from((NBTContainer) NBT.parseNBT(serialized));
+        }
+
+        @NotNull
+        @Override
+        public String serialize(@NotNull BukkitData.PersistentData element) throws SerializationException {
+            return element.getPersistentData().toString();
+        }
+
     }
 
     /**
-     * Returns the serialized version of an {@link ItemStack} as a string to object Map
-     *
-     * @param item The {@link ItemStack} to serialize
-     * @return The serialized {@link ItemStack}
+     * @deprecated Use {@link Serializer.Json} in the common module instead
      */
-    @Nullable
-    private static Map<String, Object> serializeItemStack(@Nullable ItemStack item) {
-        return item != null ? item.serialize() : null;
+    @Deprecated(since = "2.6")
+    public class Json<T extends Data & Adaptable> extends Serializer.Json<T> {
+
+        public Json(@NotNull HuskSync plugin, @NotNull Class<T> type) {
+            super(plugin, type);
+        }
+
+        @NotNull
+        public BukkitHuskSync getPlugin() {
+            return (BukkitHuskSync) plugin;
+        }
+
     }
 
-    /**
-     * Returns the deserialized {@link ItemStack} from the Object read from the {@link BukkitObjectInputStream}
-     *
-     * @param serializedItemStack The serialized item stack; a String-Object map
-     * @return The deserialized {@link ItemStack}
-     */
-    @SuppressWarnings("unchecked") // Ignore the "Unchecked cast" warning
-    @Nullable
-    private static ItemStack deserializeItemStack(@Nullable Object serializedItemStack) {
-        return serializedItemStack != null ? ItemStack.deserialize((Map<String, Object>) serializedItemStack) : null;
-    }
-
-    /**
-     * Returns a serialized array of {@link PotionEffect}s
-     *
-     * @param potionEffects The potion effect array
-     * @return The serialized potion effects
-     */
-    public static CompletableFuture<String> serializePotionEffectArray(@NotNull PotionEffect[] potionEffects) throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> {
-            // Return an empty string if there are no effects to serialize
-            if (potionEffects.length == 0) {
-                return "";
-            }
-
-            // Create an output stream that will be encoded into base 64
-            ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
-
-            try (BukkitObjectOutputStream bukkitOutputStream = new BukkitObjectOutputStream(byteOutputStream)) {
-                // Define the length of the potion effect array to serialize
-                bukkitOutputStream.writeInt(potionEffects.length);
-
-                // Write each serialize each PotionEffect to the output stream
-                for (PotionEffect potionEffect : potionEffects) {
-                    bukkitOutputStream.writeObject(serializePotionEffect(potionEffect));
-                }
-
-                // Return encoded data, using the encoder from SnakeYaml to get a ByteArray conversion
-                return Base64Coder.encodeLines(byteOutputStream.toByteArray());
-            } catch (IOException e) {
-                throw new DataSerializationException("Failed to serialize potion effect data", e);
-            }
-        });
-    }
-
-    /**
-     * Returns an array of ItemStacks from serialized potion effect data
-     *
-     * @param potionEffectData The serialized {@link PotionEffect} array
-     * @return The {@link PotionEffect}s
-     */
-    public static CompletableFuture<PotionEffect[]> deserializePotionEffectArray(@NotNull String potionEffectData) throws DataSerializationException {
-        return CompletableFuture.supplyAsync(() -> {
-            // Return empty array if there is no potion effect data (don't apply any effects to the player)
-            if (potionEffectData.isEmpty()) {
-                return new PotionEffect[0];
-            }
-
-            // Create a byte input stream to read the serialized data
-            try (ByteArrayInputStream byteInputStream = new ByteArrayInputStream(Base64Coder.decodeLines(potionEffectData))) {
-                try (BukkitObjectInputStream bukkitInputStream = new BukkitObjectInputStream(byteInputStream)) {
-                    // Read the length of the Bukkit input stream and set the length of the array to this value
-                    PotionEffect[] potionEffects = new PotionEffect[bukkitInputStream.readInt()];
-
-                    // Set the potion effects in the array from deserialized PotionEffect data
-                    int potionIndex = 0;
-                    for (PotionEffect ignored : potionEffects) {
-                        potionEffects[potionIndex] = deserializePotionEffect(bukkitInputStream.readObject());
-                        potionIndex++;
-                    }
-
-                    // Return the finished, serialized potion effect array
-                    return potionEffects;
-                }
-            } catch (IOException | ClassNotFoundException e) {
-                throw new DataSerializationException("Failed to deserialize potion effects", e);
-            }
-        });
-    }
-
-    /**
-     * Returns the serialized version of an {@link ItemStack} as a string to object Map
-     *
-     * @param potionEffect The {@link ItemStack} to serialize
-     * @return The serialized {@link ItemStack}
-     */
-    @Nullable
-    private static Map<String, Object> serializePotionEffect(@Nullable PotionEffect potionEffect) {
-        return potionEffect != null ? potionEffect.serialize() : null;
-    }
-
-    /**
-     * Returns the deserialized {@link PotionEffect} from the Object read from the {@link BukkitObjectInputStream}
-     *
-     * @param serializedPotionEffect The serialized potion effect; a String-Object map
-     * @return The deserialized {@link PotionEffect}
-     */
-    @SuppressWarnings("unchecked") // Ignore the "Unchecked cast" warning
-    @Nullable
-    private static PotionEffect deserializePotionEffect(@Nullable Object serializedPotionEffect) {
-        return serializedPotionEffect != null ? new PotionEffect((Map<String, Object>) serializedPotionEffect) : null;
-    }
-
-
 }

bukkit/src/main/java/net/william278/husksync/data/BukkitUserDataHolder.java

@@ -0,0 +1,177 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.data;
+
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.maps.BukkitMapHandler;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.PlayerInventory;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Optional;
+
+public interface BukkitUserDataHolder extends UserDataHolder {
+
+    @Override
+    default Optional<? extends Data> getData(@NotNull Identifier id) {
+        if (id.isCustom()) {
+            return Optional.ofNullable(getCustomDataStore().get(id));
+        }
+
+        try {
+            return switch (id.getKeyValue()) {
+                case "inventory" -> getInventory();
+                case "ender_chest" -> getEnderChest();
+                case "potion_effects" -> getPotionEffects();
+                case "advancements" -> getAdvancements();
+                case "location" -> getLocation();
+                case "statistics" -> getStatistics();
+                case "health" -> getHealth();
+                case "hunger" -> getHunger();
+                case "attributes" -> getAttributes();
+                case "experience" -> getExperience();
+                case "game_mode" -> getGameMode();
+                case "flight_status" -> getFlightStatus();
+                case "persistent_data" -> getPersistentData();
+                default -> throw new IllegalStateException(String.format("Unexpected data type: %s", id));
+            };
+        } catch (Throwable e) {
+            getPlugin().debug("Failed to get data for key: " + id.asMinimalString(), e);
+            return Optional.empty();
+        }
+    }
+
+    @Override
+    default void setData(@NotNull Identifier id, @NotNull Data data) {
+        if (id.isCustom()) {
+            getCustomDataStore().put(id, data);
+        }
+        UserDataHolder.super.setData(id, data);
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Items.Inventory> getInventory() {
+        if ((isDead() && !getPlugin().getSettings().getSynchronization().getSaveOnDeath()
+                .isSyncDeadPlayersChangingServer())) {
+            return Optional.of(BukkitData.Items.Inventory.empty());
+        }
+        final PlayerInventory inventory = getPlayer().getInventory();
+        return Optional.of(BukkitData.Items.Inventory.from(
+                getMapPersister().persistLockedMaps(inventory.getContents(), getPlayer()),
+                inventory.getHeldItemSlot()
+        ));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Items.EnderChest> getEnderChest() {
+        return Optional.of(BukkitData.Items.EnderChest.adapt(
+                getMapPersister().persistLockedMaps(getPlayer().getEnderChest().getContents(), getPlayer())
+        ));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.PotionEffects> getPotionEffects() {
+        return Optional.of(BukkitData.PotionEffects.from(getPlayer().getActivePotionEffects()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Advancements> getAdvancements() {
+        return Optional.of(BukkitData.Advancements.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Location> getLocation() {
+        return Optional.of(BukkitData.Location.adapt(getPlayer().getLocation()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Statistics> getStatistics() {
+        return Optional.of(BukkitData.Statistics.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Health> getHealth() {
+        return Optional.of(BukkitData.Health.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Hunger> getHunger() {
+        return Optional.of(BukkitData.Hunger.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Attributes> getAttributes() {
+        return Optional.of(BukkitData.Attributes.adapt(getPlayer(), getPlugin()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.Experience> getExperience() {
+        return Optional.of(BukkitData.Experience.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.GameMode> getGameMode() {
+        return Optional.of(BukkitData.GameMode.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.FlightStatus> getFlightStatus() {
+        return Optional.of(BukkitData.FlightStatus.adapt(getPlayer()));
+    }
+
+    @NotNull
+    @Override
+    default Optional<Data.PersistentData> getPersistentData() {
+        return Optional.of(BukkitData.PersistentData.adapt(getPlayer().getPersistentDataContainer()));
+    }
+
+    boolean isDead();
+
+    @NotNull
+    Player getPlayer();
+
+    /**
+     * @deprecated Use {@link #getPlayer()} instead
+     */
+    @Deprecated(since = "3.6")
+    @NotNull
+    default Player getBukkitPlayer() {
+        return getPlayer();
+    }
+
+    @NotNull
+    default BukkitMapHandler getMapPersister() {
+        return (BukkitHuskSync) getPlugin();
+    }
+
+
+}

bukkit/src/main/java/net/william278/husksync/event/BukkitDataSaveEvent.java

@@ -1,24 +1,43 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.event;
 
-import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.UserData;
-import net.william278.husksync.player.User;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.user.User;
 import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 import org.jetbrains.annotations.NotNull;
 
+@SuppressWarnings("unused")
 public class BukkitDataSaveEvent extends BukkitEvent implements DataSaveEvent, Cancellable {
     private static final HandlerList HANDLER_LIST = new HandlerList();
-    private boolean cancelled = false;
-    private UserData userData;
+    private final HuskSync plugin;
+    private final DataSnapshot.Packed snapshot;
     private final User user;
-    private final DataSaveCause saveCause;
+    private boolean cancelled = false;
 
-    protected BukkitDataSaveEvent(@NotNull User user, @NotNull UserData userData,
-                                  @NotNull DataSaveCause saveCause) {
+    protected BukkitDataSaveEvent(@NotNull User user, @NotNull DataSnapshot.Packed snapshot, @NotNull HuskSync plugin) {
         this.user = user;
-        this.userData = userData;
-        this.saveCause = saveCause;
+        this.snapshot = snapshot;
+        this.plugin = plugin;
     }
 
     @Override
@@ -38,18 +57,15 @@ public class BukkitDataSaveEvent extends BukkitEvent implements DataSaveEvent, C
     }
 
     @Override
-    public @NotNull UserData getUserData() {
-        return userData;
+    @NotNull
+    public DataSnapshot.Packed getData() {
+        return snapshot;
     }
 
+    @NotNull
     @Override
-    public void setUserData(@NotNull UserData userData) {
-        this.userData = userData;
-    }
-
-    @Override
-    public @NotNull DataSaveCause getSaveCause() {
-        return saveCause;
+    public HuskSync getPlugin() {
+        return plugin;
     }
 
     @NotNull
@@ -57,4 +73,8 @@ public class BukkitDataSaveEvent extends BukkitEvent implements DataSaveEvent, C
     public HandlerList getHandlers() {
         return HANDLER_LIST;
     }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
 }

bukkit/src/main/java/net/william278/husksync/event/BukkitEvent.java

@@ -1,29 +1,44 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.event;
 
-import net.william278.husksync.BukkitHuskSync;
-import org.bukkit.Bukkit;
 import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+import org.jetbrains.annotations.NotNull;
 
-import java.util.concurrent.CompletableFuture;
-
+@SuppressWarnings("unused")
 public abstract class BukkitEvent extends Event implements net.william278.husksync.event.Event {
 
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
     protected BukkitEvent() {
     }
 
+    @NotNull
     @Override
-    public CompletableFuture<net.william278.husksync.event.Event> fire() {
-        final CompletableFuture<net.william278.husksync.event.Event> eventFireFuture = new CompletableFuture<>();
-        // Don't fire events while the server is shutting down
-        if (!BukkitHuskSync.getInstance().isEnabled()) {
-            eventFireFuture.complete(this);
-        } else {
-            Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                Bukkit.getServer().getPluginManager().callEvent(this);
-                eventFireFuture.complete(this);
-            });
-        }
-        return eventFireFuture;
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
     }
 
 }

bukkit/src/main/java/net/william278/husksync/event/BukkitEventCannon.java

@@ -1,33 +0,0 @@
-package net.william278.husksync.event;
-
-import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.UserData;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.player.User;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.concurrent.CompletableFuture;
-
-public class BukkitEventCannon extends EventCannon {
-
-    public BukkitEventCannon() {
-    }
-
-    @Override
-    public CompletableFuture<Event> firePreSyncEvent(@NotNull OnlineUser user, @NotNull UserData userData) {
-        return new BukkitPreSyncEvent(((BukkitPlayer) user).getPlayer(), userData).fire();
-    }
-
-    @Override
-    public CompletableFuture<Event> fireDataSaveEvent(@NotNull User user, @NotNull UserData userData,
-                                                      @NotNull DataSaveCause saveCause) {
-        return new BukkitDataSaveEvent(user, userData, saveCause).fire();
-    }
-
-    @Override
-    public void fireSyncCompleteEvent(@NotNull OnlineUser user) {
-        new BukkitSyncCompleteEvent(((BukkitPlayer) user).getPlayer()).fire();
-    }
-
-}

bukkit/src/main/java/net/william278/husksync/event/BukkitEventDispatcher.java

@@ -0,0 +1,54 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.event;
+
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
+import org.bukkit.Bukkit;
+import org.jetbrains.annotations.NotNull;
+
+public interface BukkitEventDispatcher extends EventDispatcher {
+
+    @Override
+    default <T extends Event> boolean fireIsCancelled(@NotNull T event) {
+        Bukkit.getPluginManager().callEvent((org.bukkit.event.Event) event);
+        return event instanceof Cancellable cancellable && cancellable.isCancelled();
+    }
+
+    @NotNull
+    @Override
+    default PreSyncEvent getPreSyncEvent(@NotNull OnlineUser user, @NotNull DataSnapshot.Packed data) {
+        return new BukkitPreSyncEvent(user, data, getPlugin());
+    }
+
+    @NotNull
+    @Override
+    default DataSaveEvent getDataSaveEvent(@NotNull User user, @NotNull DataSnapshot.Packed data) {
+        return new BukkitDataSaveEvent(user, data, getPlugin());
+    }
+
+    @NotNull
+    @Override
+    default SyncCompleteEvent getSyncCompleteEvent(@NotNull OnlineUser user) {
+        return new BukkitSyncCompleteEvent(user, getPlugin());
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/event/BukkitPlayerEvent.java

@@ -1,35 +1,54 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.event;
 
-import net.william278.husksync.BukkitHuskSync;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
+import net.william278.husksync.user.OnlineUser;
+import org.bukkit.event.HandlerList;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.concurrent.CompletableFuture;
-
+@SuppressWarnings("unused")
 public abstract class BukkitPlayerEvent extends BukkitEvent implements PlayerEvent {
 
-    protected final Player player;
+    private static final HandlerList HANDLER_LIST = new HandlerList();
 
-    protected BukkitPlayerEvent(@NotNull Player player) {
+    protected final OnlineUser player;
+
+    protected BukkitPlayerEvent(@NotNull OnlineUser player) {
         this.player = player;
     }
 
     @Override
+    @NotNull
     public OnlineUser getUser() {
-        return BukkitPlayer.adapt(player);
+        return player;
     }
 
+    @NotNull
     @Override
-    public CompletableFuture<Event> fire() {
-        final CompletableFuture<Event> eventFireFuture = new CompletableFuture<>();
-        Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-            Bukkit.getServer().getPluginManager().callEvent(this);
-            eventFireFuture.complete(this);
-        });
-        return eventFireFuture;
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
     }
 
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+
+
 }

bukkit/src/main/java/net/william278/husksync/event/BukkitPreSyncEvent.java

@@ -1,19 +1,42 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.event;
 
-import net.william278.husksync.data.UserData;
-import org.bukkit.entity.Player;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.user.OnlineUser;
 import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 import org.jetbrains.annotations.NotNull;
 
+@SuppressWarnings("unused")
 public class BukkitPreSyncEvent extends BukkitPlayerEvent implements PreSyncEvent, Cancellable {
     private static final HandlerList HANDLER_LIST = new HandlerList();
+    private final HuskSync plugin;
+    private final DataSnapshot.Packed data;
     private boolean cancelled = false;
-    private UserData userData;
 
-    protected BukkitPreSyncEvent(@NotNull Player player, @NotNull UserData userData) {
+    protected BukkitPreSyncEvent(@NotNull OnlineUser player, @NotNull DataSnapshot.Packed data, @NotNull HuskSync plugin) {
         super(player);
-        this.userData = userData;
+        this.data = data;
+        this.plugin = plugin;
     }
 
     @Override
@@ -27,13 +50,15 @@ public class BukkitPreSyncEvent extends BukkitPlayerEvent implements PreSyncEven
     }
 
     @Override
-    public @NotNull UserData getUserData() {
-        return userData;
+    @NotNull
+    public DataSnapshot.Packed getData() {
+        return data;
     }
 
+    @NotNull
     @Override
-    public void setUserData(@NotNull UserData userData) {
-        this.userData = userData;
+    public HuskSync getPlugin() {
+        return plugin;
     }
 
     @NotNull
@@ -41,4 +66,8 @@ public class BukkitPreSyncEvent extends BukkitPlayerEvent implements PreSyncEven
     public HandlerList getHandlers() {
         return HANDLER_LIST;
     }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
 }

bukkit/src/main/java/net/william278/husksync/event/BukkitSyncCompleteEvent.java

@@ -1,13 +1,34 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.event;
 
-import org.bukkit.entity.Player;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.user.OnlineUser;
 import org.bukkit.event.HandlerList;
 import org.jetbrains.annotations.NotNull;
 
+@SuppressWarnings("unused")
 public class BukkitSyncCompleteEvent extends BukkitPlayerEvent implements SyncCompleteEvent {
     private static final HandlerList HANDLER_LIST = new HandlerList();
 
-    protected BukkitSyncCompleteEvent(@NotNull Player player) {
+    protected BukkitSyncCompleteEvent(@NotNull OnlineUser player, @NotNull HuskSync plugin) {
         super(player);
     }
 
@@ -16,4 +37,8 @@ public class BukkitSyncCompleteEvent extends BukkitPlayerEvent implements SyncCo
     public HandlerList getHandlers() {
         return HANDLER_LIST;
     }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
 }

bukkit/src/main/java/net/william278/husksync/listener/BukkitDeathEventListener.java

@@ -0,0 +1,55 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.entity.PlayerDeathEvent;
+import org.jetbrains.annotations.NotNull;
+
+public interface BukkitDeathEventListener extends Listener {
+
+    boolean handleEvent(@NotNull EventListener.ListenerType type, @NotNull EventListener.Priority priority);
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    default void onPlayerDeathHighest(@NotNull PlayerDeathEvent event) {
+        if (handleEvent(EventListener.ListenerType.DEATH_LISTENER, EventListener.Priority.HIGHEST)) {
+            handlePlayerDeath(event);
+        }
+    }
+
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    default void onPlayerDeath(@NotNull PlayerDeathEvent event) {
+        if (handleEvent(EventListener.ListenerType.DEATH_LISTENER, EventListener.Priority.NORMAL)) {
+            handlePlayerDeath(event);
+        }
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    default void onPlayerDeathLowest(@NotNull PlayerDeathEvent event) {
+        if (handleEvent(EventListener.ListenerType.DEATH_LISTENER, EventListener.Priority.LOWEST)) {
+            handlePlayerDeath(event);
+        }
+    }
+
+    void handlePlayerDeath(@NotNull PlayerDeathEvent player);
+
+}

bukkit/src/main/java/net/william278/husksync/listener/BukkitEventListener.java

@@ -1,131 +1,159 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.listener;
 
+import lombok.Getter;
 import net.william278.husksync.BukkitHuskSync;
-import net.william278.husksync.data.BukkitSerializer;
-import net.william278.husksync.data.DataSerializationException;
-import net.william278.husksync.data.ItemData;
-import net.william278.husksync.editor.ItemEditorMenuType;
-import net.william278.husksync.player.BukkitPlayer;
-import net.william278.husksync.player.OnlineUser;
-import org.bukkit.Bukkit;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.user.BukkitUser;
+import net.william278.husksync.user.OnlineUser;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
-import org.bukkit.event.block.BlockBreakEvent;
-import org.bukkit.event.block.BlockPlaceEvent;
-import org.bukkit.event.entity.EntityPickupItemEvent;
 import org.bukkit.event.entity.PlayerDeathEvent;
-import org.bukkit.event.inventory.InventoryClickEvent;
-import org.bukkit.event.inventory.InventoryCloseEvent;
-import org.bukkit.event.inventory.InventoryOpenEvent;
-import org.bukkit.event.player.PlayerDropItemEvent;
-import org.bukkit.event.player.PlayerInteractEvent;
-import org.bukkit.event.player.PlayerJoinEvent;
-import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.event.player.PlayerCommandPreprocessEvent;
+import org.bukkit.event.server.MapInitializeEvent;
 import org.bukkit.event.world.WorldSaveEvent;
+import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Arrays;
-import java.util.concurrent.CompletableFuture;
-import java.util.logging.Level;
 import java.util.stream.Collectors;
 
-public class BukkitEventListener extends EventListener implements Listener {
+@Getter
+public class BukkitEventListener extends EventListener implements BukkitJoinEventListener, BukkitQuitEventListener,
+        BukkitDeathEventListener, Listener {
 
-    public BukkitEventListener(@NotNull BukkitHuskSync huskSync) {
-        super(huskSync);
-        Bukkit.getServer().getPluginManager().registerEvents(this, huskSync);
+    protected LockedHandler lockedHandler;
+
+    public BukkitEventListener(@NotNull BukkitHuskSync plugin) {
+        super(plugin);
     }
 
-    @EventHandler(priority = EventPriority.LOWEST)
-    public void onPlayerJoin(@NotNull PlayerJoinEvent event) {
-        super.handlePlayerJoin(BukkitPlayer.adapt(event.getPlayer()));
+    public void onLoad() {
+        this.lockedHandler = createLockedHandler((BukkitHuskSync) plugin);
     }
 
-    @EventHandler(priority = EventPriority.LOWEST)
-    public void onPlayerQuit(@NotNull PlayerQuitEvent event) {
-        super.handlePlayerQuit(BukkitPlayer.adapt(event.getPlayer()));
+    public void onEnable() {
+        getPlugin().getServer().getPluginManager().registerEvents(this, getPlugin());
+        lockedHandler.onEnable();
+    }
+
+    public void handlePluginDisable() {
+        super.handlePluginDisable();
+        lockedHandler.onDisable();
+    }
+
+    @NotNull
+    private LockedHandler createLockedHandler(@NotNull BukkitHuskSync plugin) {
+        if (!getPlugin().getSettings().isCancelPackets()) {
+            return new BukkitLockedEventListener(plugin);
+        }
+        if (getPlugin().isDependencyLoaded("PacketEvents")) {
+            return new BukkitPacketEventsLockedPacketListener(plugin);
+        } else if (getPlugin().isDependencyLoaded("ProtocolLib")) {
+            return new BukkitProtocolLibLockedPacketListener(plugin);
+        }
+
+        return new BukkitLockedEventListener(plugin);
+    }
+
+    @Override
+    public boolean handleEvent(@NotNull ListenerType type, @NotNull Priority priority) {
+        return plugin.getSettings().getSynchronization().getEventPriority(type).equals(priority);
+    }
+
+    @Override
+    public void handlePlayerQuit(@NotNull BukkitUser bukkitUser) {
+        final Player player = bukkitUser.getPlayer();
+        final ItemStack itemOnCursor = player.getItemOnCursor();
+        if (!bukkitUser.isLocked() && !itemOnCursor.getType().isAir()) {
+            player.setItemOnCursor(null);
+            player.getWorld().dropItem(player.getLocation(), itemOnCursor);
+            plugin.debug("Dropped " + itemOnCursor + " for " + player.getName() + " on quit");
+        }
+        super.handlePlayerQuit(bukkitUser);
+    }
+
+    @Override
+    public void handlePlayerJoin(@NotNull BukkitUser bukkitUser) {
+        super.handlePlayerJoin(bukkitUser);
+    }
+
+    @Override
+    public void handlePlayerDeath(@NotNull PlayerDeathEvent event) {
+        final OnlineUser user = BukkitUser.adapt(event.getEntity(), plugin);
+
+        // If the player is locked or the plugin disabling, clear their drops
+        if (lockedHandler.cancelPlayerEvent(user.getUuid())) {
+            event.getDrops().clear();
+            return;
+        }
+
+        // Handle saving player data snapshots on death
+        if (!plugin.getSettings().getSynchronization().getSaveOnDeath().isEnabled()) {
+            return;
+        }
+
+        // Truncate the dropped items list to the inventory size and save the player's inventory
+        final int maxInventorySize = BukkitData.Items.Inventory.INVENTORY_SLOT_COUNT;
+        if (event.getDrops().size() > maxInventorySize) {
+            event.getDrops().subList(maxInventorySize, event.getDrops().size()).clear();
+        }
+        super.saveOnPlayerDeath(user, BukkitData.Items.ItemArray.adapt(event.getDrops()));
     }
 
     @EventHandler(ignoreCancelled = true)
     public void onWorldSave(@NotNull WorldSaveEvent event) {
-        CompletableFuture.runAsync(() -> super.handleAsyncWorldSave(event.getWorld().getPlayers().stream()
-                .map(BukkitPlayer::adapt).collect(Collectors.toList())));
+        if (!plugin.getSettings().getSynchronization().isSaveOnWorldSave()) {
+            return;
+        }
+
+        // Handle saving player data snapshots when the world saves
+        plugin.runAsync(() -> super.saveOnWorldSave(event.getWorld().getPlayers()
+                .stream().map(player -> BukkitUser.adapt(player, plugin))
+                .collect(Collectors.toList())));
     }
 
     @EventHandler(ignoreCancelled = true)
-    public void onInventoryClose(@NotNull InventoryCloseEvent event) {
-        CompletableFuture.runAsync(() -> {
-            if (event.getPlayer() instanceof Player player) {
-                final OnlineUser user = BukkitPlayer.adapt(player);
-                plugin.getDataEditor().getEditingInventoryData(user).ifPresent(menu -> {
-                    try {
-                        BukkitSerializer.serializeItemStackArray(Arrays.copyOf(event.getInventory().getContents(),
-                                menu.itemEditorMenuType == ItemEditorMenuType.INVENTORY_VIEWER
-                                        ? player.getInventory().getSize()
-                                        : player.getEnderChest().getSize())).thenAccept(
-                                serializedInventory -> super.handleMenuClose(user, new ItemData(serializedInventory)));
-                    } catch (DataSerializationException e) {
-                        plugin.getLoggingAdapter().log(Level.SEVERE,
-                                "Failed to serialize inventory data during menu close", e);
-                    }
-                });
-            }
-        });
-    }
-
-    /*
-     * Events to cancel if the player has not been set yet
-     */
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onDropItem(@NotNull PlayerDropItemEvent event) {
-        event.setCancelled(cancelPlayerEvent(BukkitPlayer.adapt(event.getPlayer())));
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onPickupItem(@NotNull EntityPickupItemEvent event) {
-        if (event.getEntity() instanceof Player player) {
-            event.setCancelled(cancelPlayerEvent(BukkitPlayer.adapt(player)));
-        }
-
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onPlayerInteract(@NotNull PlayerInteractEvent event) {
-        event.setCancelled(cancelPlayerEvent(BukkitPlayer.adapt(event.getPlayer())));
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onBlockPlace(@NotNull BlockPlaceEvent event) {
-        event.setCancelled(cancelPlayerEvent(BukkitPlayer.adapt(event.getPlayer())));
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onBlockBreak(@NotNull BlockBreakEvent event) {
-        event.setCancelled(cancelPlayerEvent(BukkitPlayer.adapt(event.getPlayer())));
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onInventoryClick(@NotNull InventoryClickEvent event) {
-        if (event.getWhoClicked() instanceof Player player) {
-            event.setCancelled(cancelInventoryClick(BukkitPlayer.adapt(player)));
+    public void onMapInitialize(@NotNull MapInitializeEvent event) {
+        if (plugin.getSettings().getSynchronization().isPersistLockedMaps() && event.getMap().isLocked()) {
+            getPlugin().runAsync(() -> ((BukkitHuskSync) plugin).renderInitializingLockedMap(event.getMap()));
         }
     }
 
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void onInventoryOpen(@NotNull InventoryOpenEvent event) {
-        if (event.getPlayer() instanceof Player player) {
-            event.setCancelled(cancelPlayerEvent(BukkitPlayer.adapt(player)));
+    // We handle commands here to allow specific command handling on ProtocolLib servers
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void onCommandProcessed(@NotNull PlayerCommandPreprocessEvent event) {
+        if (!lockedHandler.isCommandDisabled(event.getMessage().substring(1).split(" ")[0])) {
+            return;
+        }
+        if (lockedHandler.cancelPlayerEvent(event.getPlayer().getUniqueId())) {
+            event.setCancelled(true);
         }
     }
 
-    @EventHandler(ignoreCancelled = true)
-    public void onPlayerDeath(PlayerDeathEvent event) {
-        if (cancelPlayerEvent(BukkitPlayer.adapt(event.getEntity()))) {
-            event.getDrops().clear();
-        }
+    @NotNull
+    @Override
+    public BukkitHuskSync getPlugin() {
+        return (BukkitHuskSync) plugin;
     }
 
 }

bukkit/src/main/java/net/william278/husksync/listener/BukkitJoinEventListener.java

@@ -0,0 +1,60 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.user.BukkitUser;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.jetbrains.annotations.NotNull;
+
+public interface BukkitJoinEventListener extends Listener {
+
+    boolean handleEvent(@NotNull EventListener.ListenerType type, @NotNull EventListener.Priority priority);
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    default void onPlayerJoinHighest(@NotNull PlayerJoinEvent event) {
+        if (handleEvent(EventListener.ListenerType.JOIN_LISTENER, EventListener.Priority.HIGHEST)) {
+            handlePlayerJoin(BukkitUser.adapt(event.getPlayer(), getPlugin()));
+        }
+    }
+
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    default void onPlayerJoin(@NotNull PlayerJoinEvent event) {
+        if (handleEvent(EventListener.ListenerType.JOIN_LISTENER, EventListener.Priority.NORMAL)) {
+            handlePlayerJoin(BukkitUser.adapt(event.getPlayer(), getPlugin()));
+        }
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    default void onPlayerJoinLowest(@NotNull PlayerJoinEvent event) {
+        if (handleEvent(EventListener.ListenerType.JOIN_LISTENER, EventListener.Priority.LOWEST)) {
+            handlePlayerJoin(BukkitUser.adapt(event.getPlayer(), getPlugin()));
+        }
+    }
+
+    void handlePlayerJoin(@NotNull BukkitUser player);
+
+    @NotNull
+    HuskSync getPlugin();
+
+}

bukkit/src/main/java/net/william278/husksync/listener/BukkitLockedEventListener.java

@@ -0,0 +1,129 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import lombok.Getter;
+import net.william278.husksync.BukkitHuskSync;
+import org.bukkit.entity.Player;
+import org.bukkit.entity.Projectile;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.event.block.BlockPlaceEvent;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.event.entity.EntityPickupItemEvent;
+import org.bukkit.event.entity.ProjectileLaunchEvent;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryOpenEvent;
+import org.bukkit.event.player.PlayerArmorStandManipulateEvent;
+import org.bukkit.event.player.PlayerDropItemEvent;
+import org.bukkit.event.player.PlayerInteractEntityEvent;
+import org.bukkit.event.player.PlayerInteractEvent;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+@Getter
+public class BukkitLockedEventListener implements LockedHandler, Listener {
+
+    protected final BukkitHuskSync plugin;
+
+    protected BukkitLockedEventListener(@NotNull BukkitHuskSync plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public void onEnable() {
+        plugin.getServer().getPluginManager().registerEvents(this, plugin);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onProjectileLaunch(@NotNull ProjectileLaunchEvent event) {
+        final Projectile projectile = event.getEntity();
+        if (projectile.getShooter() instanceof Player player) {
+            cancelPlayerEvent(player.getUniqueId(), event);
+        }
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onDropItem(@NotNull PlayerDropItemEvent event) {
+        cancelPlayerEvent(event.getPlayer().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onPickupItem(@NotNull EntityPickupItemEvent event) {
+        if (event.getEntity() instanceof Player player) {
+            cancelPlayerEvent(player.getUniqueId(), event);
+        }
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onPlayerInteract(@NotNull PlayerInteractEvent event) {
+        cancelPlayerEvent(event.getPlayer().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onPlayerInteractEntity(@NotNull PlayerInteractEntityEvent event) {
+        cancelPlayerEvent(event.getPlayer().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onPlayerInteractArmorStand(@NotNull PlayerArmorStandManipulateEvent event) {
+        cancelPlayerEvent(event.getPlayer().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onBlockPlace(@NotNull BlockPlaceEvent event) {
+        cancelPlayerEvent(event.getPlayer().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onBlockBreak(@NotNull BlockBreakEvent event) {
+        cancelPlayerEvent(event.getPlayer().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onInventoryOpen(@NotNull InventoryOpenEvent event) {
+        if (event.getPlayer() instanceof Player player) {
+            cancelPlayerEvent(player.getUniqueId(), event);
+        }
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onInventoryClick(@NotNull InventoryClickEvent event) {
+        cancelPlayerEvent(event.getWhoClicked().getUniqueId(), event);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onPlayerTakeDamage(@NotNull EntityDamageEvent event) {
+        if (event.getEntity() instanceof Player player) {
+            cancelPlayerEvent(player.getUniqueId(), event);
+        }
+    }
+
+    private void cancelPlayerEvent(@NotNull UUID uuid, @NotNull Cancellable event) {
+        if (cancelPlayerEvent(uuid)) {
+            event.setCancelled(true);
+        }
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/listener/BukkitPacketEventsLockedPacketListener.java

@@ -0,0 +1,117 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import com.github.retrooper.packetevents.PacketEvents;
+import com.github.retrooper.packetevents.event.PacketListenerAbstract;
+import com.github.retrooper.packetevents.event.PacketListenerPriority;
+import com.github.retrooper.packetevents.event.PacketReceiveEvent;
+import com.github.retrooper.packetevents.event.PacketSendEvent;
+import com.github.retrooper.packetevents.protocol.packettype.PacketType;
+import com.google.common.collect.Sets;
+import io.github.retrooper.packetevents.factory.spigot.SpigotPacketEventsBuilder;
+import net.william278.husksync.BukkitHuskSync;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Set;
+import java.util.logging.Level;
+
+public class BukkitPacketEventsLockedPacketListener extends BukkitLockedEventListener implements LockedHandler {
+
+    protected BukkitPacketEventsLockedPacketListener(@NotNull BukkitHuskSync plugin) {
+        super(plugin);
+    }
+
+    @Override
+    @SuppressWarnings("UnstableApiUsage")
+    public void onLoad() {
+        super.onLoad();
+        PacketEvents.setAPI(SpigotPacketEventsBuilder.build(getPlugin()));
+        PacketEvents.getAPI().getSettings().reEncodeByDefault(false).checkForUpdates(false);
+        PacketEvents.getAPI().load();
+    }
+
+    @Override
+    public void onEnable() {
+        super.onEnable();
+        PacketEvents.getAPI().getEventManager().registerListener(new PlayerPacketAdapter(this));
+        PacketEvents.getAPI().init();
+        plugin.log(Level.INFO, "Using PacketEvents to cancel packets for locked players");
+    }
+
+    private static class PlayerPacketAdapter extends PacketListenerAbstract {
+
+        private static final Set<PacketType.Play.Client> ALLOWED_PACKETS = Set.of(
+                PacketType.Play.Client.KEEP_ALIVE, PacketType.Play.Client.PONG, PacketType.Play.Client.PLUGIN_MESSAGE, // Connection packets
+                PacketType.Play.Client.PLAYER_LOADED, PacketType.Play.Client.CLIENT_TICK_END, // Connection packets
+                PacketType.Play.Client.CHAT_MESSAGE, PacketType.Play.Client.CHAT_COMMAND, PacketType.Play.Client.CHAT_SESSION_UPDATE, // Chat / command packets
+                PacketType.Play.Client.PLAYER_POSITION, PacketType.Play.Client.PLAYER_POSITION_AND_ROTATION, PacketType.Play.Client.PLAYER_ROTATION, // Movement packets
+                PacketType.Play.Client.HELD_ITEM_CHANGE, PacketType.Play.Client.ANIMATION, PacketType.Play.Client.TELEPORT_CONFIRM, // Animation packets
+                PacketType.Play.Client.CLIENT_SETTINGS // Video setting packets
+        );
+
+        private static final Set<PacketType.Play.Client> CANCEL_PACKETS = getPacketsToListenFor();
+
+
+        private final BukkitPacketEventsLockedPacketListener listener;
+
+        public PlayerPacketAdapter(@NotNull BukkitPacketEventsLockedPacketListener listener) {
+            super(PacketListenerPriority.HIGH);
+            this.listener = listener;
+        }
+
+        @Override
+        public void onPacketReceive(PacketReceiveEvent event) {
+            if (!(event.getPacketType() instanceof PacketType.Play.Client client)) {
+                return;
+            }
+            if (!CANCEL_PACKETS.contains(client)) {
+                return;
+            }
+            if (listener.cancelPlayerEvent(event.getUser().getUUID())) {
+                event.setCancelled(true);
+            }
+        }
+
+        @Override
+        public void onPacketSend(PacketSendEvent event) {
+            if (!(event.getPacketType() instanceof PacketType.Play.Client client)) {
+                return;
+            }
+            if (!CANCEL_PACKETS.contains(client)) {
+                return;
+            }
+            if (listener.cancelPlayerEvent(event.getUser().getUUID())) {
+                event.setCancelled(true);
+            }
+        }
+
+        // Returns the set of ALL Server packets, excluding the set of allowed packets
+        @NotNull
+        private static Set<PacketType.Play.Client> getPacketsToListenFor() {
+            return Sets.difference(
+                    Sets.newHashSet(PacketType.Play.Client.values()),
+                    ALLOWED_PACKETS
+            );
+        }
+
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/listener/BukkitProtocolLibLockedPacketListener.java

@@ -0,0 +1,93 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.events.ListenerPriority;
+import com.comphenix.protocol.events.PacketAdapter;
+import com.comphenix.protocol.events.PacketEvent;
+import com.google.common.collect.Sets;
+import net.william278.husksync.BukkitHuskSync;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.stream.Collectors;
+
+import static com.comphenix.protocol.PacketType.Play.Client;
+
+public class BukkitProtocolLibLockedPacketListener extends BukkitLockedEventListener implements LockedHandler {
+
+    protected BukkitProtocolLibLockedPacketListener(@NotNull BukkitHuskSync plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public void onEnable() {
+        super.onEnable();
+        ProtocolLibrary.getProtocolManager().addPacketListener(new PlayerPacketAdapter(this));
+        plugin.log(Level.INFO, "Using ProtocolLib to cancel packets for locked players");
+    }
+
+    private static class PlayerPacketAdapter extends PacketAdapter {
+
+        // Packets we want the player to still be able to send/receiver to/from the server - //todo update 1.21.4
+        private static final Set<PacketType> ALLOWED_PACKETS = Set.of(
+                Client.KEEP_ALIVE, Client.PONG, Client.CUSTOM_PAYLOAD, // Connection packets
+                Client.CHAT_COMMAND, Client.CLIENT_COMMAND, Client.CHAT, Client.CHAT_SESSION_UPDATE, // Chat / command packets
+                Client.POSITION, Client.POSITION_LOOK, Client.LOOK, // Movement packets
+                Client.HELD_ITEM_SLOT, Client.ARM_ANIMATION, Client.TELEPORT_ACCEPT, // Animation packets
+                Client.SETTINGS // Video setting packets
+        );
+
+        private final BukkitProtocolLibLockedPacketListener listener;
+
+        public PlayerPacketAdapter(@NotNull BukkitProtocolLibLockedPacketListener listener) {
+            super(listener.getPlugin(), ListenerPriority.HIGHEST, getPacketsToListenFor());
+            this.listener = listener;
+        }
+
+        @Override
+        public void onPacketReceiving(@NotNull PacketEvent event) {
+            if (listener.cancelPlayerEvent(event.getPlayer().getUniqueId()) && !event.isReadOnly()) {
+                event.setCancelled(true);
+            }
+        }
+
+        @Override
+        public void onPacketSending(@NotNull PacketEvent event) {
+            if (listener.cancelPlayerEvent(event.getPlayer().getUniqueId()) && !event.isReadOnly()) {
+                event.setCancelled(true);
+            }
+        }
+
+        // Returns the set of ALL Server packets, excluding the set of allowed packets
+        @NotNull
+        private static Set<PacketType> getPacketsToListenFor() {
+            return Sets.difference(
+                    Client.getInstance().values().stream().filter(PacketType::isSupported).collect(Collectors.toSet()),
+                    ALLOWED_PACKETS
+            );
+        }
+
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/listener/BukkitQuitEventListener.java

@@ -0,0 +1,60 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.user.BukkitUser;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.jetbrains.annotations.NotNull;
+
+public interface BukkitQuitEventListener extends Listener {
+
+    boolean handleEvent(@NotNull EventListener.ListenerType type, @NotNull EventListener.Priority priority);
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    default void onPlayerQuitHighest(@NotNull PlayerQuitEvent event) {
+        if (handleEvent(EventListener.ListenerType.QUIT_LISTENER, EventListener.Priority.HIGHEST)) {
+            handlePlayerQuit(BukkitUser.adapt(event.getPlayer(), getPlugin()));
+        }
+    }
+
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    default void onPlayerQuit(@NotNull PlayerQuitEvent event) {
+        if (handleEvent(EventListener.ListenerType.QUIT_LISTENER, EventListener.Priority.NORMAL)) {
+            handlePlayerQuit(BukkitUser.adapt(event.getPlayer(), getPlugin()));
+        }
+    }
+
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    default void onPlayerQuitLowest(@NotNull PlayerQuitEvent event) {
+        if (handleEvent(EventListener.ListenerType.QUIT_LISTENER, EventListener.Priority.LOWEST)) {
+            handlePlayerQuit(BukkitUser.adapt(event.getPlayer(), getPlugin()));
+        }
+    }
+
+    void handlePlayerQuit(@NotNull BukkitUser player);
+
+    @NotNull
+    HuskSync getPlugin();
+
+}

bukkit/src/main/java/net/william278/husksync/listener/PaperEventListener.java

@@ -0,0 +1,106 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.listener;
+
+import com.google.common.collect.Lists;
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.user.BukkitUser;
+import net.william278.husksync.user.OnlineUser;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.entity.PlayerDeathEvent;
+import org.bukkit.event.player.PlayerAdvancementDoneEvent;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.PlayerInventory;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Iterator;
+import java.util.List;
+
+import static net.william278.husksync.config.Settings.SynchronizationSettings.SaveOnDeathSettings;
+
+public class PaperEventListener extends BukkitEventListener {
+
+    public PaperEventListener(@NotNull BukkitHuskSync plugin) {
+        super(plugin);
+    }
+
+    @Override
+    @SuppressWarnings("RedundantMethodOverride")
+    public void onEnable() {
+        getPlugin().getServer().getPluginManager().registerEvents(this, getPlugin());
+        lockedHandler.onEnable();
+    }
+
+    @Override
+    public void handlePlayerDeath(@NotNull PlayerDeathEvent event) {
+        // If the player is locked or the plugin disabling, clear their drops
+        final OnlineUser user = BukkitUser.adapt(event.getEntity(), plugin);
+        if (lockedHandler.cancelPlayerEvent(user.getUuid())) {
+            event.getDrops().clear();
+            event.getItemsToKeep().clear();
+            return;
+        }
+
+        // Handle saving player data snapshots on death
+        final SaveOnDeathSettings settings = plugin.getSettings().getSynchronization().getSaveOnDeath();
+        if (!settings.isEnabled()) {
+            return;
+        }
+
+        // Paper - support saving the player's items to keep if enabled
+        final int maxInventorySize = BukkitData.Items.Inventory.INVENTORY_SLOT_COUNT;
+        final List<ItemStack> itemsToSave = switch (settings.getItemsToSave()) {
+            case DROPS -> event.getDrops();
+            case ITEMS_TO_KEEP -> preserveOrder(event.getEntity().getInventory(), event.getItemsToKeep());
+        };
+        if (itemsToSave.size() > maxInventorySize) {
+            itemsToSave.subList(maxInventorySize, itemsToSave.size()).clear();
+        }
+        super.saveOnPlayerDeath(user, BukkitData.Items.ItemArray.adapt(itemsToSave));
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onPlayerAdvancementDone(@NotNull PlayerAdvancementDoneEvent event) {
+        if (lockedHandler.cancelPlayerEvent(event.getPlayer().getUniqueId())) {
+            event.message(null);
+        }
+    }
+
+    @NotNull
+    private List<ItemStack> preserveOrder(@NotNull PlayerInventory inventory, @NotNull List<ItemStack> toKeep) {
+        final List<ItemStack> preserved = Lists.newArrayList();
+        final List<ItemStack> items = Lists.newArrayList(inventory.getContents());
+        for (ItemStack item : toKeep) {
+            final Iterator<ItemStack> iterator = items.iterator();
+            while (iterator.hasNext()) {
+                final ItemStack originalItem = iterator.next();
+                if (originalItem != null && originalItem.equals(item)) {
+                    preserved.add(originalItem);
+                    iterator.remove();
+                    break;
+                }
+            }
+        }
+        return preserved;
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/maps/BukkitMapHandler.java

@@ -0,0 +1,620 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.maps;
+
+import com.google.common.collect.Lists;
+import de.tr7zw.changeme.nbtapi.NBT;
+import de.tr7zw.changeme.nbtapi.iface.ReadWriteNBT;
+import de.tr7zw.changeme.nbtapi.iface.ReadableItemNBT;
+import de.tr7zw.changeme.nbtapi.iface.ReadableNBT;
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.redis.RedisManager;
+import net.william278.mapdataapi.MapBanner;
+import net.william278.mapdataapi.MapData;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.World;
+import org.bukkit.block.Container;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.BlockStateMeta;
+import org.bukkit.inventory.meta.BundleMeta;
+import org.bukkit.inventory.meta.MapMeta;
+import org.bukkit.map.*;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.Blocking;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.awt.*;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.*;
+import java.util.List;
+import java.util.function.Function;
+import java.util.logging.Level;
+
+public interface BukkitMapHandler {
+
+    // The map used to store HuskSync data in ItemStack NBT
+    String MAP_DATA_KEY = "husksync:persisted_locked_map";
+    // The legacy map key used to store pixel data (3.7.3 and below)
+    String MAP_LEGACY_PIXEL_DATA_KEY = "husksync:canvas_data";
+    // Name of server the map originates from
+    String MAP_ORIGIN_KEY = "origin";
+    // Original map id
+    String MAP_ID_KEY = "id";
+
+    /**
+     * Persist locked maps in an array of {@link ItemStack}s
+     *
+     * @param items            the array of {@link ItemStack}s to persist locked maps in
+     * @param delegateRenderer the player to delegate the rendering of map pixel canvases to
+     * @return the array of {@link ItemStack}s with locked maps persisted to serialized NBT
+     */
+    @NotNull
+    default ItemStack[] persistLockedMaps(@NotNull ItemStack[] items, @NotNull Player delegateRenderer) {
+        if (!getPlugin().getSettings().getSynchronization().isPersistLockedMaps()) {
+            return items;
+        }
+        return forEachMap(items, map -> this.persistMapView(map, delegateRenderer));
+    }
+
+    /**
+     * Apply persisted locked maps to an array of {@link ItemStack}s
+     *
+     * @param items the array of {@link ItemStack}s to apply persisted locked maps to
+     * @return the array of {@link ItemStack}s with persisted locked maps applied
+     */
+    @Nullable
+    default ItemStack @NotNull [] setMapViews(@Nullable ItemStack @NotNull [] items) {
+        if (!getPlugin().getSettings().getSynchronization().isPersistLockedMaps()) {
+            return items;
+        }
+        return forEachMap(items, this::applyMapView);
+    }
+
+    // Perform an operation on each map in an array of ItemStacks
+    @NotNull
+    private ItemStack[] forEachMap(ItemStack[] items, @NotNull Function<ItemStack, ItemStack> function) {
+        for (int i = 0; i < items.length; i++) {
+            final ItemStack item = items[i];
+            if (item == null) {
+                continue;
+            }
+            if (item.getType() == Material.FILLED_MAP && item.hasItemMeta()) {
+                items[i] = function.apply(item);
+            } else if (item.getItemMeta() instanceof BlockStateMeta b && b.getBlockState() instanceof Container box
+                    && !box.getInventory().isEmpty()) {
+                forEachMap(box.getInventory().getContents(), function);
+                b.setBlockState(box);
+                item.setItemMeta(b);
+            } else if (item.getItemMeta() instanceof BundleMeta bundle && bundle.hasItems()) {
+                bundle.setItems(List.of(forEachMap(bundle.getItems().toArray(ItemStack[]::new), function)));
+                item.setItemMeta(bundle);
+            }
+        }
+        return items;
+    }
+
+    @Blocking
+    private void writeMapData(@NotNull String serverName, int mapId, MapData data) {
+        final byte[] dataBytes = getPlugin().getDataAdapter().toBytes(new AdaptableMapData(data));
+        getRedisManager().setMapData(serverName, mapId, dataBytes);
+        getPlugin().getDatabase().saveMapData(serverName, mapId, dataBytes);
+    }
+
+    @Nullable
+    @Blocking
+    private MapData readMapData(@NotNull String serverName, int mapId) {
+        final byte[] readData = fetchMapData(serverName, mapId);
+        if (readData == null) {
+            return null;
+        }
+        return deserializeMapData(readData);
+    }
+
+    @Nullable
+    @Blocking
+    private byte[] fetchMapData(@NotNull String serverName, int mapId) {
+        return fetchMapData(serverName, mapId, true);
+    }
+
+    @Nullable
+    @Blocking
+    private byte[] fetchMapData(@NotNull String serverName, int mapId, boolean doReverseLookup) {
+        // Read from Redis cache
+        final byte[] redisData = getRedisManager().getMapData(serverName, mapId);
+        if (redisData != null) {
+            return redisData;
+        }
+
+        // Read from database and set to Redis
+        final byte[] databaseData = getPlugin().getDatabase().getMapData(serverName, mapId);
+        if (databaseData != null) {
+            getRedisManager().setMapData(serverName, mapId, databaseData);
+            return databaseData;
+        }
+
+        // Otherwise, lookup a reverse map binding
+        if (doReverseLookup) {
+            return fetchReversedMapData(serverName, mapId);
+        }
+        return null;
+    }
+
+    @Nullable
+    private byte[] fetchReversedMapData(@NotNull String serverName, int mapId) {
+        // Lookup binding from Redis cache, then fetch data if found
+        Map.Entry<String, Integer> binding = getRedisManager().getReversedMapBound(serverName, mapId);
+        if (binding != null) {
+            return fetchMapData(binding.getKey(), binding.getValue(), false);
+        }
+
+        // Lookup binding from database, then set to Redis & fetch data if found
+        binding = getPlugin().getDatabase().getMapBinding(serverName, mapId);
+        if (binding != null) {
+            getRedisManager().bindMapIds(binding.getKey(), binding.getValue(), serverName, mapId);
+            return fetchMapData(binding.getKey(), binding.getValue(), false);
+        }
+        return null;
+    }
+
+    @Nullable
+    private MapData deserializeMapData(byte @NotNull [] data) {
+        try {
+            return getPlugin().getDataAdapter().fromBytes(data, AdaptableMapData.class)
+                    .getData(getPlugin().getDataVersion(getPlugin().getMinecraftVersion()));
+        } catch (IOException e) {
+            getPlugin().log(Level.WARNING, "Failed to deserialize map data", e);
+            return null;
+        }
+    }
+
+    // Get the bound map ID
+    private int getBoundMapId(@NotNull String fromServerName, int fromMapId, @NotNull String toServerName) {
+        // Get the map ID from Redis, if set
+        final Optional<Integer> redisId = getRedisManager().getBoundMapId(fromServerName, fromMapId, toServerName);
+        if (redisId.isPresent()) {
+            return redisId.get();
+        }
+
+        // Get from the database; if found, set to Redis
+        final int result = getPlugin().getDatabase().getBoundMapId(fromServerName, fromMapId, toServerName);
+        if (result != -1) {
+            getPlugin().getRedisManager().bindMapIds(fromServerName, fromMapId, toServerName, result);
+        }
+        return result;
+    }
+
+    @NotNull
+    private ItemStack persistMapView(@NotNull ItemStack map, @NotNull Player delegateRenderer) {
+        final MapMeta meta = Objects.requireNonNull((MapMeta) map.getItemMeta());
+        if (!meta.hasMapView()) {
+            return map;
+        }
+        final MapView view = meta.getMapView();
+        if (view == null || view.getWorld() == null || !view.isLocked() || view.isVirtual()) {
+            return map;
+        }
+
+        NBT.modify(map, nbt -> {
+            // Don't save the map's data twice
+            if (nbt.hasTag(MAP_DATA_KEY)) {
+                return;
+            }
+
+            // Render the map
+            final int dataVersion = getPlugin().getDataVersion(getPlugin().getMinecraftVersion());
+            final PersistentMapCanvas canvas = new PersistentMapCanvas(view, dataVersion);
+            for (MapRenderer renderer : view.getRenderers()) {
+                renderer.render(view, canvas, delegateRenderer);
+                getPlugin().debug(String.format("Rendered locked map canvas to view (#%s)", view.getId()));
+            }
+
+            // Persist map data
+            final ReadWriteNBT mapData = nbt.getOrCreateCompound(MAP_DATA_KEY);
+            final String serverName = getPlugin().getServerName();
+            mapData.setString(MAP_ORIGIN_KEY, serverName);
+            mapData.setInteger(MAP_ID_KEY, meta.getMapId());
+            if (readMapData(serverName, meta.getMapId()) == null) {
+                writeMapData(serverName, meta.getMapId(), canvas.extractMapData());
+            }
+            getPlugin().debug(String.format("Saved data for locked map (#%s, server: %s)", view.getId(), serverName));
+        });
+        return map;
+    }
+
+    @SuppressWarnings("deprecation")
+    @NotNull
+    private ItemStack applyMapView(@NotNull ItemStack map) {
+        final MapMeta meta = Objects.requireNonNull((MapMeta) map.getItemMeta());
+        NBT.get(map, nbt -> {
+            if (!nbt.hasTag(MAP_DATA_KEY)) {
+                return;
+            }
+
+            final ReadableNBT mapData = nbt.getCompound(MAP_DATA_KEY);
+            if (mapData == null) {
+                return;
+            }
+
+            // Server the map was originally created on, and the current server. If they match, isOrigin is true.
+            final String originServer = mapData.getString(MAP_ORIGIN_KEY);
+            final String currentServer = getPlugin().getServerName();
+            final boolean isOrigin = currentServer.equals(originServer);
+
+            // Determine the map's ID on its origin server, and the new ID it should be bound to here.
+            // Then, update the map item / data accordingly (re-rendering and caching the map if needed)
+            final int originalId = mapData.getInteger(MAP_ID_KEY);
+            int newId = isOrigin ? originalId : getBoundMapId(originServer, originalId, currentServer);
+            if (newId != -1) {
+                handleBoundMap(meta, nbt, originServer, originalId, newId, isOrigin);
+            } else {
+                handleUnboundMap(meta, nbt, originServer, originalId, currentServer);
+            }
+
+            map.setItemMeta(meta);
+        });
+        return map;
+    }
+
+    private void handleBoundMap(@NotNull MapMeta meta, @NotNull ReadableItemNBT nbt, @NotNull String originServer,
+                                int originalId, int newId, boolean isOrigin) {
+        MapView view = Bukkit.getMap(newId);
+        if (isOrigin && view != null) {
+            meta.setMapView(view);
+            getPlugin().debug("Map ID set to original ID #%s".formatted(newId));
+            return;
+        }
+
+        Optional<MapView> optionalView = getMapView(newId);
+        if (optionalView.isPresent()) {
+            meta.setMapView(optionalView.get());
+            getPlugin().debug("Map ID set to #%s".formatted(newId));
+            return;
+        }
+
+        getPlugin().debug("Deserializing map data from NBT and generating view...");
+        MapData mapData = readMapData(originServer, originalId);
+        if (mapData == null && nbt.hasTag(MAP_LEGACY_PIXEL_DATA_KEY)) {
+            mapData = readLegacyMapItemData(nbt);
+        }
+
+        if (mapData == null) {
+            getPlugin().debug("Read pixel data was not found in database, skipping...");
+            return;
+        }
+
+        MapView newView = view != null ? view : Bukkit.createMap(getDefaultMapWorld());
+        generateRenderedMap(mapData, newView);
+        meta.setMapView(newView);
+    }
+
+    private void handleUnboundMap(@NotNull MapMeta meta, @NotNull ReadableItemNBT nbt, @NotNull String originServer,
+                                  int originalId, @NotNull String currentServer) {
+        getPlugin().debug("Deserializing map data from NBT and generating view...");
+        MapData mapData = readMapData(originServer, originalId);
+        if (mapData == null && nbt.hasTag(MAP_LEGACY_PIXEL_DATA_KEY)) {
+            mapData = readLegacyMapItemData(nbt);
+        }
+
+        if (mapData == null) {
+            getPlugin().debug("Read pixel data was not found in database, skipping...");
+            return;
+        }
+
+        final MapView view = generateRenderedMap(Objects.requireNonNull(mapData, "Pixel data null!"));
+        meta.setMapView(view);
+
+        final int id = view.getId();
+        getRedisManager().bindMapIds(originServer, originalId, currentServer, id);
+        getPlugin().getDatabase().setMapBinding(originServer, originalId, currentServer, id);
+
+        getPlugin().debug("Bound map to view (#%s) on server %s".formatted(id, currentServer));
+    }
+
+    // Render a persisted locked map that is initializing (i.e. in an item frame)
+    default void renderInitializingLockedMap(@NotNull MapView view) {
+        if (view.isVirtual()) {
+            return;
+        }
+        final Optional<MapView> optionalView = getMapView(view.getId());
+        if (optionalView.isPresent()) {
+            view.getRenderers().clear();
+            view.getRenderers().addAll(optionalView.get().getRenderers());
+            view.setLocked(true);
+            view.setScale(MapView.Scale.CLOSEST);
+            view.setTrackingPosition(false);
+            view.setUnlimitedTracking(false);
+            return;
+        }
+
+        MapData data = readMapData(getPlugin().getServerName(), view.getId());
+        if (data == null) {
+            data = readLegacyMapFileData(view.getId());
+        }
+
+        if (data == null) {
+            World world = view.getWorld() == null ? getDefaultMapWorld() : view.getWorld();
+            getPlugin().debug("Not rendering map: no data in DB for world %s, map #%s."
+                    .formatted(world.getName(), view.getId()));
+            return;
+        }
+        renderMapView(view, data);
+    }
+
+    @NotNull
+    private MapView generateRenderedMap(@NotNull MapData canvasData) {
+        return generateRenderedMap(canvasData, Bukkit.createMap(getDefaultMapWorld()));
+    }
+
+    @NotNull
+    private MapView generateRenderedMap(@NotNull MapData canvasData, @NotNull MapView view) {
+        renderMapView(view, canvasData);
+        return view;
+    }
+
+    private void renderMapView(@NotNull MapView view, @NotNull MapData canvasData) {
+        view.getRenderers().clear();
+        view.addRenderer(new PersistentMapRenderer(canvasData));
+        view.setLocked(true);
+        view.setScale(MapView.Scale.CLOSEST);
+        view.setTrackingPosition(false);
+        view.setUnlimitedTracking(false);
+        setMapView(view);
+    }
+
+    @NotNull
+    private static World getDefaultMapWorld() {
+        final World world = Bukkit.getWorlds().get(0);
+        if (world == null) {
+            throw new IllegalStateException("No worlds are loaded on the server!");
+        }
+        return world;
+    }
+
+    default Optional<MapView> getMapView(int id) {
+        return getMapViews().containsKey(id) ? Optional.of(getMapViews().get(id)) : Optional.empty();
+    }
+
+    default void setMapView(@NotNull MapView view) {
+        getMapViews().put(view.getId(), view);
+    }
+
+    /**
+     * A {@link MapRenderer} that can be used to render persistently serialized {@link MapData} to a {@link MapView}
+     */
+    @SuppressWarnings("deprecation")
+    class PersistentMapRenderer extends MapRenderer {
+
+        private final MapData canvasData;
+
+        private PersistentMapRenderer(@NotNull MapData canvasData) {
+            super(false);
+            this.canvasData = canvasData;
+        }
+
+        @Override
+        public void render(@NotNull MapView map, @NotNull MapCanvas canvas, @NotNull Player player) {
+            // We set the pixels in this order to avoid the map being rendered upside down
+            for (int i = 0; i < 128; i++) {
+                for (int j = 0; j < 128; j++) {
+                    canvas.setPixel(j, i, (byte) canvasData.getColorAt(i, j));
+                }
+            }
+
+            // Set the map banners and markers
+            final MapCursorCollection cursors = canvas.getCursors();
+            while (cursors.size() > 0) {
+                cursors.removeCursor(cursors.getCursor(0));
+            }
+
+            canvasData.getBanners().forEach(banner -> cursors.addCursor(createBannerCursor(banner)));
+            canvas.setCursors(cursors);
+        }
+    }
+
+    @NotNull
+    private static MapCursor createBannerCursor(@NotNull MapBanner banner) {
+        return new MapCursor(
+                (byte) banner.getPosition().getX(),
+                (byte) banner.getPosition().getZ(),
+                (byte) 8, // Always rotate banners upright
+                switch (banner.getColor().toLowerCase(Locale.ENGLISH)) {
+                    case "white" -> MapCursor.Type.BANNER_WHITE;
+                    case "orange" -> MapCursor.Type.BANNER_ORANGE;
+                    case "magenta" -> MapCursor.Type.BANNER_MAGENTA;
+                    case "light_blue" -> MapCursor.Type.BANNER_LIGHT_BLUE;
+                    case "yellow" -> MapCursor.Type.BANNER_YELLOW;
+                    case "lime" -> MapCursor.Type.BANNER_LIME;
+                    case "pink" -> MapCursor.Type.BANNER_PINK;
+                    case "gray" -> MapCursor.Type.BANNER_GRAY;
+                    case "light_gray" -> MapCursor.Type.BANNER_LIGHT_GRAY;
+                    case "cyan" -> MapCursor.Type.BANNER_CYAN;
+                    case "purple" -> MapCursor.Type.BANNER_PURPLE;
+                    case "blue" -> MapCursor.Type.BANNER_BLUE;
+                    case "brown" -> MapCursor.Type.BANNER_BROWN;
+                    case "green" -> MapCursor.Type.BANNER_GREEN;
+                    case "red" -> MapCursor.Type.BANNER_RED;
+                    default -> MapCursor.Type.BANNER_BLACK;
+                },
+                true,
+                banner.getText().isEmpty() ? null : banner.getText()
+        );
+    }
+
+    // Legacy - read maps from item stacks
+    @Nullable
+    @Blocking
+    private MapData readLegacyMapItemData(@NotNull ReadableItemNBT nbt) {
+        final int dataVer = getPlugin().getDataVersion(getPlugin().getMinecraftVersion());
+        try {
+            return MapData.fromByteArray(dataVer,
+                    Objects.requireNonNull(nbt.getByteArray(MAP_LEGACY_PIXEL_DATA_KEY)));
+        } catch (IOException e) {
+            getPlugin().log(Level.WARNING, "Failed to read legacy map data", e);
+            return null;
+        }
+    }
+
+    // Legacy - read maps from files
+    @Nullable
+    private MapData readLegacyMapFileData(int mapId) {
+        final Path path = getPlugin().getDataFolder().toPath().resolve("maps").resolve(mapId + ".dat");
+        final File file = path.toFile();
+        if (!file.exists()) {
+            return null;
+        }
+        try {
+            return MapData.fromNbt(file);
+        } catch (IOException e) {
+            getPlugin().log(Level.WARNING, "Failed to read legacy map file", e);
+            return null;
+        }
+    }
+
+    /**
+     * A {@link MapCanvas} implementation used for pre-rendering maps to be converted into {@link MapData}
+     */
+    @SuppressWarnings({"deprecation", "removal"})
+    class PersistentMapCanvas implements MapCanvas {
+
+        private static final String BANNER_PREFIX = "banner_";
+
+        private final int mapDataVersion;
+        private final MapView mapView;
+        private final int[][] pixels = new int[128][128];
+        private MapCursorCollection cursors;
+
+        private PersistentMapCanvas(@NotNull MapView mapView, int mapDataVersion) {
+            this.mapDataVersion = mapDataVersion;
+            this.mapView = mapView;
+        }
+
+        @NotNull
+        @Override
+        public MapView getMapView() {
+            return mapView;
+        }
+
+        @NotNull
+        @Override
+        public MapCursorCollection getCursors() {
+            return cursors == null ? (cursors = new MapCursorCollection()) : cursors;
+        }
+
+        @Override
+        public void setCursors(@NotNull MapCursorCollection cursors) {
+            this.cursors = cursors;
+        }
+
+        @Override
+        @Deprecated
+        public void setPixel(int x, int y, byte color) {
+            pixels[x][y] = color;
+        }
+
+        @Override
+        @Deprecated
+        public byte getPixel(int x, int y) {
+            return (byte) pixels[x][y];
+        }
+
+        @Override
+        @Deprecated
+        public byte getBasePixel(int x, int y) {
+            return (byte) pixels[x][y];
+        }
+
+        @Override
+        public void setPixelColor(int x, int y, @Nullable Color color) {
+            pixels[x][y] = color == null ? -1 : MapPalette.matchColor(color);
+        }
+
+        @Nullable
+        @Override
+        public Color getPixelColor(int x, int y) {
+            return MapPalette.getColor((byte) pixels[x][y]);
+        }
+
+        @NotNull
+        @Override
+        public Color getBasePixelColor(int x, int y) {
+            return MapPalette.getColor((byte) pixels[x][y]);
+        }
+
+        @Override
+        public void drawImage(int x, int y, @NotNull Image image) {
+            // Not implemented
+        }
+
+        @Override
+        public void drawText(int x, int y, @NotNull MapFont font, @NotNull String text) {
+            // Not implemented
+        }
+
+        @NotNull
+        private String getDimension() {
+            return mapView.getWorld() != null ? switch (mapView.getWorld().getEnvironment()) {
+                case NETHER -> "minecraft:the_nether";
+                case THE_END -> "minecraft:the_end";
+                default -> "minecraft:overworld";
+            } : "minecraft:overworld";
+        }
+
+        /**
+         * Extract the map data from the canvas. Must be rendered first
+         *
+         * @return the extracted map data
+         */
+        @NotNull
+        private MapData extractMapData() {
+            final List<MapBanner> banners = Lists.newArrayList();
+            for (int i = 0; i < getCursors().size(); i++) {
+                final MapCursor cursor = getCursors().getCursor(i);
+                final String type = cursor.getType().getKey().getKey();
+                if (type.startsWith(BANNER_PREFIX)) {
+                    banners.add(new MapBanner(
+                            type.replaceAll(BANNER_PREFIX, ""),
+                            cursor.getCaption() == null ? "" : cursor.getCaption(),
+                            cursor.getX(),
+                            mapView.getWorld() != null ? mapView.getWorld().getSeaLevel() : 128,
+                            cursor.getY()
+                    ));
+                }
+
+            }
+            return MapData.fromPixels(mapDataVersion, pixels, getDimension(), (byte) 0, banners, List.of());
+        }
+    }
+
+    @NotNull
+    Map<Integer, MapView> getMapViews();
+
+    @ApiStatus.Internal
+    RedisManager getRedisManager();
+
+    @ApiStatus.Internal
+    @NotNull
+    BukkitHuskSync getPlugin();
+
+}

bukkit/src/main/java/net/william278/husksync/migrator/LegacyMigrator.java

@@ -1,26 +1,51 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.migrator;
 
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
 import com.zaxxer.hikari.HikariDataSource;
 import me.william278.husksync.bukkit.data.DataSerializer;
 import net.william278.hslmigrator.HSLConverter;
 import net.william278.husksync.HuskSync;
-import net.william278.husksync.config.Settings;
-import net.william278.husksync.data.*;
-import net.william278.husksync.player.User;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.data.Data;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.user.User;
+import net.william278.husksync.util.BukkitLegacyConverter;
 import org.bukkit.Material;
 import org.bukkit.Statistic;
 import org.bukkit.entity.EntityType;
 import org.jetbrains.annotations.NotNull;
 
-import java.io.IOException;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.util.*;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.logging.Level;
 import java.util.regex.Pattern;
 
+import static net.william278.husksync.config.Settings.DatabaseSettings;
+
 public class LegacyMigrator extends Migrator {
 
     private final HSLConverter hslConverter;
@@ -32,50 +57,50 @@ public class LegacyMigrator extends Migrator {
     private String sourcePlayersTable;
     private String sourceDataTable;
 
-    private final String minecraftVersion;
-
     public LegacyMigrator(@NotNull HuskSync plugin) {
         super(plugin);
         this.hslConverter = HSLConverter.getInstance();
-        this.sourceHost = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_HOST);
-        this.sourcePort = plugin.getSettings().getIntegerValue(Settings.ConfigOption.DATABASE_PORT);
-        this.sourceUsername = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_USERNAME);
-        this.sourcePassword = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_PASSWORD);
-        this.sourceDatabase = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_NAME);
+
+        final DatabaseSettings.DatabaseCredentials credentials = plugin.getSettings().getDatabase().getCredentials();
+        this.sourceHost = credentials.getHost();
+        this.sourcePort = credentials.getPort();
+        this.sourceUsername = credentials.getUsername();
+        this.sourcePassword = credentials.getPassword();
+        this.sourceDatabase = credentials.getDatabase();
         this.sourcePlayersTable = "husksync_players";
         this.sourceDataTable = "husksync_data";
-        this.minecraftVersion = plugin.getMinecraftVersion().toString();
     }
 
     @Override
     public CompletableFuture<Boolean> start() {
-        plugin.getLoggingAdapter().log(Level.INFO, "Starting migration of legacy HuskSync v1.x data...");
+        plugin.log(Level.INFO, "Starting migration of legacy HuskSync v1.x data...");
         final long startTime = System.currentTimeMillis();
-        return CompletableFuture.supplyAsync(() -> {
+        return plugin.supplyAsync(() -> {
             // Wipe the existing database, preparing it for data import
-            plugin.getLoggingAdapter().log(Level.INFO, "Preparing existing database (wiping)...");
-            plugin.getDatabase().wipeDatabase().join();
-            plugin.getLoggingAdapter().log(Level.INFO, "Successfully wiped user data database (took " + (System.currentTimeMillis() - startTime) + "ms)");
+            plugin.log(Level.INFO, "Preparing existing database (wiping)...");
+            plugin.getDatabase().wipeDatabase();
+            plugin.log(Level.INFO, "Successfully wiped user data database (took " + (System.currentTimeMillis() - startTime) + "ms)");
 
             // Create jdbc driver connection url
             final String jdbcUrl = "jdbc:mysql://" + sourceHost + ":" + sourcePort + "/" + sourceDatabase;
 
             // Create a new data source for the mpdb converter
             try (final HikariDataSource connectionPool = new HikariDataSource()) {
-                plugin.getLoggingAdapter().log(Level.INFO, "Establishing connection to legacy database...");
+                plugin.log(Level.INFO, "Establishing connection to legacy database...");
                 connectionPool.setJdbcUrl(jdbcUrl);
                 connectionPool.setUsername(sourceUsername);
                 connectionPool.setPassword(sourcePassword);
-                connectionPool.setPoolName((getIdentifier() + "_migrator_pool").toUpperCase());
+                connectionPool.setPoolName((getIdentifier() + "_migrator_pool").toUpperCase(Locale.ENGLISH));
 
-                plugin.getLoggingAdapter().log(Level.INFO, "Downloading raw data from the legacy database...");
-                final List<LegacyData> dataToMigrate = new ArrayList<>();
+                plugin.log(Level.INFO, "Downloading raw data from the legacy database (this might take a while)...");
+                final List<LegacyData> dataToMigrate = Lists.newArrayList();
                 try (final Connection connection = connectionPool.getConnection()) {
                     try (final PreparedStatement statement = connection.prepareStatement("""
                             SELECT `uuid`, `username`, `inventory`, `ender_chest`, `health`, `max_health`, `health_scale`, `hunger`, `saturation`, `saturation_exhaustion`, `selected_slot`, `status_effects`, `total_experience`, `exp_level`, `exp_progress`, `game_mode`, `statistics`, `is_flying`, `advancements`, `location`
                             FROM `%source_players_table%`
                             INNER JOIN `%source_data_table%`
-                                ON `%source_players_table%`.`id` = `%source_data_table%`.`player_id`;
+                            ON `%source_players_table%`.`id` = `%source_data_table%`.`player_id`
+                            WHERE `username` IS NOT NULL;
                             """.replaceAll(Pattern.quote("%source_players_table%"), sourcePlayersTable)
                             .replaceAll(Pattern.quote("%source_data_table%"), sourceDataTable))) {
                         try (final ResultSet resultSet = statement.executeQuery()) {
@@ -104,26 +129,36 @@ public class LegacyMigrator extends Migrator {
                                         resultSet.getString("location")
                                 ));
                                 playersMigrated++;
-                                if (playersMigrated % 25 == 0) {
-                                    plugin.getLoggingAdapter().log(Level.INFO, "Downloaded legacy data for " + playersMigrated + " players...");
+                                if (playersMigrated % 50 == 0) {
+                                    plugin.log(Level.INFO, "Downloaded legacy data for " + playersMigrated + " players...");
                                 }
                             }
                         }
                     }
                 }
-                plugin.getLoggingAdapter().log(Level.INFO, "Completed download of " + dataToMigrate.size() + " entries from the legacy database!");
-                plugin.getLoggingAdapter().log(Level.INFO, "Converting HuskSync 1.x data to the latest HuskSync user data format...");
-                dataToMigrate.forEach(data -> data.toUserData(hslConverter, minecraftVersion).thenAccept(convertedData ->
-                        plugin.getDatabase().ensureUser(data.user()).thenRun(() ->
-                                plugin.getDatabase().setUserData(data.user(), convertedData, DataSaveCause.LEGACY_MIGRATION)
-                                        .exceptionally(exception -> {
-                                            plugin.getLoggingAdapter().log(Level.SEVERE, "Failed to migrate legacy data for " + data.user().username + ": " + exception.getMessage());
-                                            return null;
-                                        }))));
-                plugin.getLoggingAdapter().log(Level.INFO, "Migration complete for " + dataToMigrate.size() + " users in " + ((System.currentTimeMillis() - startTime) / 1000) + " seconds!");
+                plugin.log(Level.INFO, "Completed download of " + dataToMigrate.size() + " entries from the legacy database!");
+                plugin.log(Level.INFO, "Converting HuskSync 1.x data to the new user data format (this might take a while)...");
+
+                final AtomicInteger playersConverted = new AtomicInteger();
+                dataToMigrate.forEach(data -> {
+                    final DataSnapshot.Packed convertedData = data.toUserData(hslConverter, plugin);
+                    plugin.getDatabase().ensureUser(data.user());
+                    try {
+                        plugin.getDatabase().addSnapshot(data.user(), convertedData);
+                    } catch (Throwable e) {
+                        plugin.log(Level.SEVERE, "Failed to migrate legacy data for " + data.user().getName() + ": " + e.getMessage());
+                        return;
+                    }
+
+                    playersConverted.getAndIncrement();
+                    if (playersConverted.get() % 50 == 0) {
+                        plugin.log(Level.INFO, "Converted legacy data for " + playersConverted + " players...");
+                    }
+                });
+                plugin.log(Level.INFO, "Migration complete for " + dataToMigrate.size() + " users in " + ((System.currentTimeMillis() - startTime) / 1000) + " seconds!");
                 return true;
-            } catch (Exception e) {
-                plugin.getLoggingAdapter().log(Level.SEVERE, "Error while migrating legacy data: " + e.getMessage() + " - are your source database credentials correct?");
+            } catch (Throwable e) {
+                plugin.log(Level.SEVERE, "Error while migrating legacy data: " + e.getMessage() + " - are your source database credentials correct?", e);
                 return false;
             }
         });
@@ -132,7 +167,7 @@ public class LegacyMigrator extends Migrator {
     @Override
     public void handleConfigurationCommand(@NotNull String[] args) {
         if (args.length == 2) {
-            if (switch (args[0].toLowerCase()) {
+            if (switch (args[0].toLowerCase(Locale.ENGLISH)) {
                 case "host" -> {
                     this.sourceHost = args[1];
                     yield true;
@@ -167,15 +202,15 @@ public class LegacyMigrator extends Migrator {
                 }
                 default -> false;
             }) {
-                plugin.getLoggingAdapter().log(Level.INFO, getHelpMenu());
-                plugin.getLoggingAdapter().log(Level.INFO, "Successfully set " + args[0] + " to " +
-                                                           obfuscateDataString(args[1]));
+                plugin.log(Level.INFO, getHelpMenu());
+                plugin.log(Level.INFO, "Successfully set " + args[0] + " to " +
+                                       obfuscateDataString(args[1]));
             } else {
-                plugin.getLoggingAdapter().log(Level.INFO, "Invalid operation, could not set " + args[0] + " to " +
-                                                           obfuscateDataString(args[1]) + " (is it a valid option?)");
+                plugin.log(Level.INFO, "Invalid operation, could not set " + args[0] + " to " +
+                                       obfuscateDataString(args[1]) + " (is it a valid option?)");
             }
         } else {
-            plugin.getLoggingAdapter().log(Level.INFO, getHelpMenu());
+            plugin.log(Level.INFO, getHelpMenu());
         }
     }
 
@@ -188,22 +223,22 @@ public class LegacyMigrator extends Migrator {
     @NotNull
     @Override
     public String getName() {
-        return "HuskSync v1.x --> v2.x Migrator";
+        return "HuskSync v1.x --> v3.x Migrator";
     }
 
     @NotNull
     @Override
     public String getHelpMenu() {
         return """
-                === HuskSync v1.x --> v2.x Migration Wizard =========
+                === HuskSync v1.x --> v3.x Migration Wizard =========
                 This will migrate all user data from HuskSync v1.x to
-                HuskSync v2.x's new format. To perform the migration,
+                HuskSync v3.x's new format. To perform the migration,
                 please follow the steps below carefully.
-                                
+
                 [!] Existing data in the database will be wiped. [!]
-                                
+
                 STEP 1] Please ensure no players are on any servers.
-                                
+
                 STEP 2] HuskSync will need to connect to the database
                 used to hold the existing, legacy HuskSync data.
                 If this is the same database as the one you are
@@ -223,12 +258,12 @@ public class LegacyMigrator extends Migrator {
                 using the command:
                 "husksync migrate legacy set <parameter> <value>"
                 (e.g.: "husksync migrate legacy set host 1.2.3.4")
-                                
+
                 STEP 3] HuskSync will migrate data into the database
                 tables configures in the config.yml file of this
                 server. Please make sure you're happy with this
                 before proceeding.
-                                
+
                 STEP 4] To start the migration, please run:
                 "husksync migrate legacy start"
                 """.replaceAll(Pattern.quote("%source_host%"), obfuscateDataString(sourceHost))
@@ -249,72 +284,90 @@ public class LegacyMigrator extends Migrator {
                               @NotNull String serializedAdvancements, @NotNull String serializedLocation) {
 
         @NotNull
-        public CompletableFuture<UserData> toUserData(@NotNull HSLConverter converter,
-                                                      @NotNull String minecraftVersion) {
-            return CompletableFuture.supplyAsync(() -> {
-                try {
-                    final DataSerializer.StatisticData legacyStatisticData = converter
-                            .deserializeStatisticData(serializedStatistics);
-                    final StatisticsData convertedStatisticData = new StatisticsData(
-                            convertStatisticMap(legacyStatisticData.untypedStatisticValues()),
-                            convertMaterialStatisticMap(legacyStatisticData.blockStatisticValues()),
-                            convertMaterialStatisticMap(legacyStatisticData.itemStatisticValues()),
-                            convertEntityStatisticMap(legacyStatisticData.entityStatisticValues()));
+        public DataSnapshot.Packed toUserData(@NotNull HSLConverter converter, @NotNull HuskSync plugin) {
+            try {
+                final DataSerializer.StatisticData stats = converter.deserializeStatisticData(serializedStatistics);
+                final DataSerializer.PlayerLocation loc = converter.deserializePlayerLocationData(serializedLocation);
+                final BukkitLegacyConverter adapter = (BukkitLegacyConverter) plugin.getLegacyConverter()
+                        .orElseThrow(() -> new IllegalStateException("Legacy converter not present"));
 
-                    final List<AdvancementData> convertedAdvancements = converter
-                            .deserializeAdvancementData(serializedAdvancements)
-                            .stream().map(data -> new AdvancementData(data.key(), data.criteriaMap())).toList();
+                return DataSnapshot.builder(plugin)
+                        // Inventory
+                        .inventory(BukkitData.Items.Inventory.from(
+                                adapter.deserializeLegacyItemStacks(serializedInventory),
+                                selectedSlot
+                        ))
 
-                    final DataSerializer.PlayerLocation legacyLocationData = converter
-                            .deserializePlayerLocationData(serializedLocation);
-                    final LocationData convertedLocationData = new LocationData(
-                            legacyLocationData == null ? "world" : legacyLocationData.worldName(),
-                            UUID.randomUUID(),
-                            "NORMAL",
-                            legacyLocationData == null ? 0d : legacyLocationData.x(),
-                            legacyLocationData == null ? 64d : legacyLocationData.y(),
-                            legacyLocationData == null ? 0d : legacyLocationData.z(),
-                            legacyLocationData == null ? 90f : legacyLocationData.yaw(),
-                            legacyLocationData == null ? 180f : legacyLocationData.pitch());
+                        // Ender chest
+                        .enderChest(BukkitData.Items.EnderChest.adapt(
+                                adapter.deserializeLegacyItemStacks(serializedEnderChest)
+                        ))
 
-                    return new UserData(new StatusData(health, maxHealth, healthScale, hunger, saturation,
-                            saturationExhaustion, selectedSlot, totalExp, expLevel, expProgress, gameMode, isFlying),
-                            new ItemData(serializedInventory), new ItemData(serializedEnderChest),
-                            new PotionEffectData(serializedPotionEffects), convertedAdvancements,
-                            convertedStatisticData, convertedLocationData,
-                            new PersistentDataContainerData(new HashMap<>()),
-                            minecraftVersion);
-                } catch (IOException e) {
-                    throw new RuntimeException(e);
-                }
-            });
+                        // Location
+                        .location(BukkitData.Location.from(
+                                loc == null ? 0d : loc.x(),
+                                loc == null ? 64d : loc.y(),
+                                loc == null ? 0d : loc.z(),
+                                loc == null ? 90f : loc.yaw(),
+                                loc == null ? 180f : loc.pitch(),
+                                new Data.Location.World(
+                                        loc == null ? "world" : loc.worldName(),
+                                        UUID.randomUUID(), "NORMAL"
+                                )))
+
+                        // Advancements
+                        .advancements(BukkitData.Advancements.from(converter
+                                .deserializeAdvancementData(serializedAdvancements).stream()
+                                .map(data -> Data.Advancements.Advancement.adapt(data.key(), data.criteriaMap()))
+                                .toList()))
+
+                        // Stats
+                        .statistics(BukkitData.Statistics.from(
+                                convertStatisticMap(stats.untypedStatisticValues()),
+                                convertMaterialStatisticMap(stats.blockStatisticValues()),
+                                convertMaterialStatisticMap(stats.itemStatisticValues()),
+                                convertEntityStatisticMap(stats.entityStatisticValues())
+                        ))
+
+                        // Health, hunger, experience & game mode
+                        .health(BukkitData.Health.from(health, healthScale, false))
+                        .hunger(BukkitData.Hunger.from(hunger, saturation, saturationExhaustion))
+                        .experience(BukkitData.Experience.from(totalExp, expLevel, expProgress))
+                        .gameMode(BukkitData.GameMode.from(gameMode))
+                        .flightStatus(BukkitData.FlightStatus.from(isFlying, isFlying))
+
+                        // Build & pack into new format
+                        .saveCause(DataSnapshot.SaveCause.LEGACY_MIGRATION).buildAndPack();
+            } catch (Throwable e) {
+                throw new IllegalStateException(e);
+            }
         }
 
         private Map<String, Integer> convertStatisticMap(@NotNull HashMap<Statistic, Integer> rawMap) {
-            final HashMap<String, Integer> convertedMap = new HashMap<>();
+            final HashMap<String, Integer> convertedMap = Maps.newHashMap();
             for (Map.Entry<Statistic, Integer> entry : rawMap.entrySet()) {
-                convertedMap.put(entry.getKey().toString(), entry.getValue());
+                convertedMap.put(entry.getKey().getKey().toString(), entry.getValue());
             }
             return convertedMap;
         }
 
         private Map<String, Map<String, Integer>> convertMaterialStatisticMap(@NotNull HashMap<Statistic, HashMap<Material, Integer>> rawMap) {
-            final Map<String, Map<String, Integer>> convertedMap = new HashMap<>();
+            final Map<String, Map<String, Integer>> convertedMap = Maps.newHashMap();
             for (Map.Entry<Statistic, HashMap<Material, Integer>> entry : rawMap.entrySet()) {
                 for (Map.Entry<Material, Integer> materialEntry : entry.getValue().entrySet()) {
-                    convertedMap.computeIfAbsent(entry.getKey().toString(), k -> new HashMap<>())
-                            .put(materialEntry.getKey().toString(), materialEntry.getValue());
+                    convertedMap.computeIfAbsent(entry.getKey().getKey().toString(), k -> new HashMap<>())
+                            .put(materialEntry.getKey().getKey().toString(), materialEntry.getValue());
                 }
             }
             return convertedMap;
         }
 
         private Map<String, Map<String, Integer>> convertEntityStatisticMap(@NotNull HashMap<Statistic, HashMap<EntityType, Integer>> rawMap) {
-            final Map<String, Map<String, Integer>> convertedMap = new HashMap<>();
+            final Map<String, Map<String, Integer>> convertedMap = Maps.newHashMap();
             for (Map.Entry<Statistic, HashMap<EntityType, Integer>> entry : rawMap.entrySet()) {
                 for (Map.Entry<EntityType, Integer> materialEntry : entry.getValue().entrySet()) {
-                    convertedMap.computeIfAbsent(entry.getKey().toString(), k -> new HashMap<>())
-                            .put(materialEntry.getKey().toString(), materialEntry.getValue());
+                    convertedMap.computeIfAbsent(entry.getKey().getKey().toString(), k -> new HashMap<>())
+                            .put(materialEntry.getKey().getKey().toString(), materialEntry.getValue());
                 }
             }
             return convertedMap;

bukkit/src/main/java/net/william278/husksync/migrator/MpdbMigrator.java

@@ -1,28 +1,54 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.migrator;
 
+import com.google.common.collect.Lists;
 import com.zaxxer.hikari.HikariDataSource;
 import net.william278.husksync.BukkitHuskSync;
-import net.william278.husksync.config.Settings;
-import net.william278.husksync.data.*;
-import net.william278.husksync.player.User;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.user.User;
 import net.william278.mpdbconverter.MPDBConverter;
 import org.bukkit.Bukkit;
 import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.plugin.Plugin;
 import org.jetbrains.annotations.NotNull;
 
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
-import java.util.*;
+import java.util.List;
+import java.util.Locale;
+import java.util.Objects;
+import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.logging.Level;
 import java.util.regex.Pattern;
 
+import static net.william278.husksync.config.Settings.DatabaseSettings;
+
 /**
- * A migrator for migrating MySQLPlayerDataBridge data to HuskSync {@link UserData}
+ * A migrator for migrating MySQLPlayerDataBridge data to HuskSync {@link DataSnapshot}s
  */
 public class MpdbMigrator extends Migrator {
 
@@ -35,46 +61,48 @@ public class MpdbMigrator extends Migrator {
     private String sourceInventoryTable;
     private String sourceEnderChestTable;
     private String sourceExperienceTable;
-    private final String minecraftVersion;
 
-    public MpdbMigrator(@NotNull BukkitHuskSync plugin, @NotNull Plugin mySqlPlayerDataBridge) {
+    public MpdbMigrator(@NotNull BukkitHuskSync plugin) {
         super(plugin);
-        this.mpdbConverter = MPDBConverter.getInstance(mySqlPlayerDataBridge);
-        this.sourceHost = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_HOST);
-        this.sourcePort = plugin.getSettings().getIntegerValue(Settings.ConfigOption.DATABASE_PORT);
-        this.sourceUsername = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_USERNAME);
-        this.sourcePassword = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_PASSWORD);
-        this.sourceDatabase = plugin.getSettings().getStringValue(Settings.ConfigOption.DATABASE_NAME);
+        this.mpdbConverter = MPDBConverter.getInstance(Objects.requireNonNull(
+                Bukkit.getPluginManager().getPlugin("MySQLPlayerDataBridge"),
+                "MySQLPlayerDataBridge dependency not found!"
+        ));
+        final DatabaseSettings.DatabaseCredentials credentials = plugin.getSettings().getDatabase().getCredentials();
+        this.sourceHost = credentials.getHost();
+        this.sourcePort = credentials.getPort();
+        this.sourceUsername = credentials.getUsername();
+        this.sourcePassword = credentials.getPassword();
+        this.sourceDatabase = credentials.getDatabase();
         this.sourceInventoryTable = "mpdb_inventory";
         this.sourceEnderChestTable = "mpdb_enderchest";
         this.sourceExperienceTable = "mpdb_experience";
-        this.minecraftVersion = plugin.getMinecraftVersion().toString();
 
     }
 
     @Override
     public CompletableFuture<Boolean> start() {
-        plugin.getLoggingAdapter().log(Level.INFO, "Starting migration from MySQLPlayerDataBridge to HuskSync...");
+        plugin.log(Level.INFO, "Starting migration from MySQLPlayerDataBridge to HuskSync...");
         final long startTime = System.currentTimeMillis();
-        return CompletableFuture.supplyAsync(() -> {
+        return plugin.supplyAsync(() -> {
             // Wipe the existing database, preparing it for data import
-            plugin.getLoggingAdapter().log(Level.INFO, "Preparing existing database (wiping)...");
-            plugin.getDatabase().wipeDatabase().join();
-            plugin.getLoggingAdapter().log(Level.INFO, "Successfully wiped user data database (took " + (System.currentTimeMillis() - startTime) + "ms)");
+            plugin.log(Level.INFO, "Preparing existing database (wiping)...");
+            plugin.getDatabase().wipeDatabase();
+            plugin.log(Level.INFO, "Successfully wiped user data database (took " + (System.currentTimeMillis() - startTime) + "ms)");
 
             // Create jdbc driver connection url
             final String jdbcUrl = "jdbc:mysql://" + sourceHost + ":" + sourcePort + "/" + sourceDatabase;
 
             // Create a new data source for the mpdb converter
             try (final HikariDataSource connectionPool = new HikariDataSource()) {
-                plugin.getLoggingAdapter().log(Level.INFO, "Establishing connection to MySQLPlayerDataBridge database...");
+                plugin.log(Level.INFO, "Establishing connection to MySQLPlayerDataBridge database...");
                 connectionPool.setJdbcUrl(jdbcUrl);
                 connectionPool.setUsername(sourceUsername);
                 connectionPool.setPassword(sourcePassword);
-                connectionPool.setPoolName((getIdentifier() + "_migrator_pool").toUpperCase());
+                connectionPool.setPoolName((getIdentifier() + "_migrator_pool").toUpperCase(Locale.ENGLISH));
 
-                plugin.getLoggingAdapter().log(Level.INFO, "Downloading raw data from the MySQLPlayerDataBridge database...");
-                final List<MpdbData> dataToMigrate = new ArrayList<>();
+                plugin.log(Level.INFO, "Downloading raw data from the MySQLPlayerDataBridge database (this might take a while)...");
+                final List<MpdbData> dataToMigrate = Lists.newArrayList();
                 try (final Connection connection = connectionPool.getConnection()) {
                     try (final PreparedStatement statement = connection.prepareStatement("""
                             SELECT `%source_inventory_table%`.`player_uuid`, `%source_inventory_table%`.`player_name`, `inventory`, `armor`, `enderchest`, `exp_lvl`, `exp`, `total_exp`
@@ -101,25 +129,29 @@ public class MpdbMigrator extends Migrator {
                                 ));
                                 playersMigrated++;
                                 if (playersMigrated % 25 == 0) {
-                                    plugin.getLoggingAdapter().log(Level.INFO, "Downloaded MySQLPlayerDataBridge data for " + playersMigrated + " players...");
+                                    plugin.log(Level.INFO, "Downloaded MySQLPlayerDataBridge data for " + playersMigrated + " players...");
                                 }
                             }
                         }
                     }
                 }
-                plugin.getLoggingAdapter().log(Level.INFO, "Completed download of " + dataToMigrate.size() + " entries from the MySQLPlayerDataBridge database!");
-                plugin.getLoggingAdapter().log(Level.INFO, "Converting raw MySQLPlayerDataBridge data to HuskSync user data...");
-                dataToMigrate.forEach(data -> data.toUserData(mpdbConverter, minecraftVersion).thenAccept(convertedData ->
-                        plugin.getDatabase().ensureUser(data.user()).thenRun(() ->
-                                        plugin.getDatabase().setUserData(data.user(), convertedData, DataSaveCause.MPDB_MIGRATION))
-                                .exceptionally(exception -> {
-                                    plugin.getLoggingAdapter().log(Level.SEVERE, "Failed to migrate MySQLPlayerDataBridge data for " + data.user().username + ": " + exception.getMessage());
-                                    return null;
-                                })));
-                plugin.getLoggingAdapter().log(Level.INFO, "Migration complete for " + dataToMigrate.size() + " users in " + ((System.currentTimeMillis() - startTime) / 1000) + " seconds!");
+                plugin.log(Level.INFO, "Completed download of " + dataToMigrate.size() + " entries from the MySQLPlayerDataBridge database!");
+                plugin.log(Level.INFO, "Converting raw MySQLPlayerDataBridge data to HuskSync user data (this might take a while)...");
+
+                final AtomicInteger playersConverted = new AtomicInteger();
+                dataToMigrate.forEach(data -> {
+                    final DataSnapshot.Packed convertedData = data.toUserData(mpdbConverter, plugin);
+                    plugin.getDatabase().ensureUser(data.user());
+                    plugin.getDatabase().addSnapshot(data.user(), convertedData);
+                    playersConverted.getAndIncrement();
+                    if (playersConverted.get() % 50 == 0) {
+                        plugin.log(Level.INFO, "Converted MySQLPlayerDataBridge data for " + playersConverted + " players...");
+                    }
+                });
+                plugin.log(Level.INFO, "Migration complete for " + dataToMigrate.size() + " users in " + ((System.currentTimeMillis() - startTime) / 1000) + " seconds!");
                 return true;
-            } catch (Exception e) {
-                plugin.getLoggingAdapter().log(Level.SEVERE, "Error while migrating data: " + e.getMessage() + " - are your source database credentials correct?");
+            } catch (Throwable e) {
+                plugin.log(Level.SEVERE, "Error while migrating data: " + e.getMessage() + " - are your source database credentials correct?");
                 return false;
             }
         });
@@ -128,7 +160,7 @@ public class MpdbMigrator extends Migrator {
     @Override
     public void handleConfigurationCommand(@NotNull String[] args) {
         if (args.length == 2) {
-            if (switch (args[0].toLowerCase()) {
+            if (switch (args[0].toLowerCase(Locale.ENGLISH)) {
                 case "host" -> {
                     this.sourceHost = args[1];
                     yield true;
@@ -167,15 +199,15 @@ public class MpdbMigrator extends Migrator {
                 }
                 default -> false;
             }) {
-                plugin.getLoggingAdapter().log(Level.INFO, getHelpMenu());
-                plugin.getLoggingAdapter().log(Level.INFO, "Successfully set " + args[0] + " to " +
-                                                           obfuscateDataString(args[1]));
+                plugin.log(Level.INFO, getHelpMenu());
+                plugin.log(Level.INFO, "Successfully set " + args[0] + " to " +
+                                       obfuscateDataString(args[1]));
             } else {
-                plugin.getLoggingAdapter().log(Level.INFO, "Invalid operation, could not set " + args[0] + " to " +
-                                                           obfuscateDataString(args[1]) + " (is it a valid option?)");
+                plugin.log(Level.INFO, "Invalid operation, could not set " + args[0] + " to " +
+                                       obfuscateDataString(args[1]) + " (is it a valid option?)");
             }
         } else {
-            plugin.getLoggingAdapter().log(Level.INFO, getHelpMenu());
+            plugin.log(Level.INFO, getHelpMenu());
         }
     }
 
@@ -196,16 +228,19 @@ public class MpdbMigrator extends Migrator {
     public String getHelpMenu() {
         return """
                 === MySQLPlayerDataBridge Migration Wizard ==========
+                NOTE: This migrator currently WORKS WITH MPDB version
+                v4.9.2 and below!
+                
                 This will migrate inventories, ender chests and XP
                 from the MySQLPlayerDataBridge plugin to HuskSync.
-                                
+
                 To prevent excessive migration times, other non-vital
                 data will not be transferred.
-                                
+
                 [!] Existing data in the database will be wiped. [!]
-                                
+
                 STEP 1] Please ensure no players are on any servers.
-                                
+
                 STEP 2] HuskSync will need to connect to the database
                 used to hold the source MySQLPlayerDataBridge data.
                 Please check these database parameters are OK:
@@ -220,15 +255,18 @@ public class MpdbMigrator extends Migrator {
                 If any of these are not correct, please correct them
                 using the command:
                 "husksync migrate mpdb set <parameter> <value>"
-                (e.g.: "husksync migrate mpdb set host 1.2.3.4")
-                                
+                (e.g.: "husksync migrate set mpdb host 1.2.3.4")
+
                 STEP 3] HuskSync will migrate data into the database
                 tables configures in the config.yml file of this
                 server. Please make sure you're happy with this
                 before proceeding.
-                                
+
                 STEP 4] To start the migration, please run:
-                "husksync migrate mpdb start"
+                "husksync migrate start mpdb"
+                
+                NOTE: This migrator currently WORKS WITH MPDB version
+                v4.9.2 and below!
                 """.replaceAll(Pattern.quote("%source_host%"), obfuscateDataString(sourceHost))
                 .replaceAll(Pattern.quote("%source_port%"), Integer.toString(sourcePort))
                 .replaceAll(Pattern.quote("%source_username%"), obfuscateDataString(sourceUsername))
@@ -250,42 +288,43 @@ public class MpdbMigrator extends Migrator {
      * @param expProgress          The player's current XP progress
      * @param totalExp             The player's total XP score
      */
-    private record MpdbData(@NotNull User user, @NotNull String serializedInventory,
-                            @NotNull String serializedArmor, @NotNull String serializedEnderChest,
-                            int expLevel, float expProgress, int totalExp) {
+    private record MpdbData(
+            @NotNull User user,
+            @NotNull String serializedInventory,
+            @NotNull String serializedArmor,
+            @NotNull String serializedEnderChest,
+            int expLevel,
+            float expProgress,
+            int totalExp
+    ) {
+
         /**
-         * Converts exported MySQLPlayerDataBridge data into HuskSync's {@link UserData} object format
+         * Converts exported MySQLPlayerDataBridge data into HuskSync's {@link DataSnapshot} object format
          *
          * @param converter The {@link MPDBConverter} to use for converting to {@link ItemStack}s
-         * @return A {@link CompletableFuture} that will resolve to the converted {@link UserData} object
+         * @return A {@link CompletableFuture} that will resolve to the converted {@link DataSnapshot} object
          */
         @NotNull
-        public CompletableFuture<UserData> toUserData(@NotNull MPDBConverter converter,
-                                                      @NotNull String minecraftVersion) {
-            return CompletableFuture.supplyAsync(() -> {
-                // Combine inventory and armour
-                final Inventory inventory = Bukkit.createInventory(null, InventoryType.PLAYER);
-                inventory.setContents(converter.getItemStackFromSerializedData(serializedInventory));
-                final ItemStack[] armor = converter.getItemStackFromSerializedData(serializedArmor).clone();
-                for (int i = 36; i < 36 + armor.length; i++) {
-                    inventory.setItem(i, armor[i - 36]);
-                }
+        public DataSnapshot.Packed toUserData(@NotNull MPDBConverter converter, @NotNull HuskSync plugin) {
+            // Combine inventory and armor
+            final Inventory inventory = Bukkit.createInventory(null, InventoryType.PLAYER);
+            inventory.setContents(converter.getItemStackFromSerializedData(serializedInventory));
+            final ItemStack[] armor = converter.getItemStackFromSerializedData(serializedArmor).clone();
+            for (int i = 36; i < 36 + armor.length; i++) {
+                inventory.setItem(i, armor[i - 36]);
+            }
+            final ItemStack[] enderChest = converter.getItemStackFromSerializedData(serializedEnderChest);
 
-                // Create user data record
-                return new UserData(new StatusData(20, 20, 0, 20, 10,
-                        1, 0, totalExp, expLevel, expProgress, "SURVIVAL",
-                        false),
-                        new ItemData(BukkitSerializer.serializeItemStackArray(inventory.getContents()).join()),
-                        new ItemData(BukkitSerializer.serializeItemStackArray(converter
-                                .getItemStackFromSerializedData(serializedEnderChest)).join()),
-                        new PotionEffectData(""), new ArrayList<>(),
-                        new StatisticsData(new HashMap<>(), new HashMap<>(), new HashMap<>(), new HashMap<>()),
-                        new LocationData("world", UUID.randomUUID(), "NORMAL", 0, 0, 0,
-                                0f, 0f),
-                        new PersistentDataContainerData(new HashMap<>()),
-                        minecraftVersion);
-            });
+            // Create user data record
+            return DataSnapshot.builder(plugin)
+                    .inventory(BukkitData.Items.Inventory.from(inventory.getContents(), 0))
+                    .enderChest(BukkitData.Items.EnderChest.adapt(enderChest))
+                    .experience(BukkitData.Experience.from(totalExp, expLevel, expProgress))
+                    .gameMode(BukkitData.GameMode.from("SURVIVAL"))
+                    .saveCause(DataSnapshot.SaveCause.MPDB_MIGRATION)
+                    .buildAndPack();
         }
+
     }
 
 }

bukkit/src/main/java/net/william278/husksync/player/BukkitPlayer.java

@@ -1,497 +0,0 @@
-package net.william278.husksync.player;
-
-import de.themoep.minedown.MineDown;
-import net.md_5.bungee.api.ChatMessageType;
-import net.md_5.bungee.api.chat.BaseComponent;
-import net.william278.husksync.BukkitHuskSync;
-import net.william278.husksync.data.*;
-import net.william278.husksync.editor.ItemEditorMenu;
-import net.william278.husksync.util.Version;
-import org.apache.commons.lang.ArrayUtils;
-import org.bukkit.*;
-import org.bukkit.advancement.Advancement;
-import org.bukkit.advancement.AdvancementProgress;
-import org.bukkit.attribute.Attribute;
-import org.bukkit.entity.EntityType;
-import org.bukkit.entity.Player;
-import org.bukkit.event.player.PlayerTeleportEvent;
-import org.bukkit.inventory.Inventory;
-import org.bukkit.persistence.PersistentDataContainer;
-import org.bukkit.persistence.PersistentDataType;
-import org.bukkit.potion.PotionEffect;
-import org.bukkit.potion.PotionEffectType;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.*;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicReference;
-import java.util.logging.Level;
-
-/**
- * Bukkit implementation of an {@link OnlineUser}
- */
-public class BukkitPlayer extends OnlineUser {
-
-    private final Player player;
-
-    private BukkitPlayer(@NotNull Player player) {
-        super(player.getUniqueId(), player.getName());
-        this.player = player;
-    }
-
-    public static BukkitPlayer adapt(@NotNull Player player) {
-        return new BukkitPlayer(player);
-    }
-
-    public Player getPlayer() {
-        return player;
-    }
-
-    @Override
-    public CompletableFuture<StatusData> getStatus() {
-        return CompletableFuture.supplyAsync(() -> {
-            final double maxHealth = getMaxHealth(player);
-            return new StatusData(Math.min(player.getHealth(), maxHealth),
-                    maxHealth,
-                    player.isHealthScaled() ? player.getHealthScale() : 0d,
-                    player.getFoodLevel(),
-                    player.getSaturation(),
-                    player.getExhaustion(),
-                    player.getInventory().getHeldItemSlot(),
-                    player.getTotalExperience(),
-                    player.getLevel(),
-                    player.getExp(),
-                    player.getGameMode().name(),
-                    player.getAllowFlight() && player.isFlying());
-        });
-    }
-
-    @Override
-    public CompletableFuture<Void> setStatus(@NotNull StatusData statusData,
-                                             @NotNull List<StatusDataFlag> statusDataFlags) {
-        return CompletableFuture.runAsync(() -> {
-            double currentMaxHealth = Objects.requireNonNull(player.getAttribute(Attribute.GENERIC_MAX_HEALTH))
-                    .getBaseValue();
-            if (statusDataFlags.contains(StatusDataFlag.SET_MAX_HEALTH)) {
-                if (statusData.maxHealth != 0d) {
-                    Objects.requireNonNull(player.getAttribute(Attribute.GENERIC_MAX_HEALTH))
-                            .setBaseValue(statusData.maxHealth);
-                    currentMaxHealth = statusData.maxHealth;
-                }
-            }
-            if (statusDataFlags.contains(StatusDataFlag.SET_HEALTH)) {
-                final double currentHealth = player.getHealth();
-                if (statusData.health != currentHealth) {
-                    final double healthToSet = currentHealth > currentMaxHealth ? currentMaxHealth : statusData.health;
-                    if (healthToSet <= 0) {
-                        Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> player.setHealth(healthToSet));
-                    } else {
-                        player.setHealth(healthToSet);
-                    }
-                }
-
-                if (statusData.healthScale != 0d) {
-                    player.setHealthScale(statusData.healthScale);
-                } else {
-                    player.setHealthScale(statusData.maxHealth);
-                }
-                player.setHealthScaled(statusData.healthScale != 0D);
-            }
-            if (statusDataFlags.contains(StatusDataFlag.SET_HUNGER)) {
-                player.setFoodLevel(statusData.hunger);
-                player.setSaturation(statusData.saturation);
-                player.setExhaustion(statusData.saturationExhaustion);
-            }
-            if (statusDataFlags.contains(StatusDataFlag.SET_SELECTED_ITEM_SLOT)) {
-                player.getInventory().setHeldItemSlot(statusData.selectedItemSlot);
-            }
-            if (statusDataFlags.contains(StatusDataFlag.SET_EXPERIENCE)) {
-                player.setTotalExperience(statusData.totalExperience);
-                player.setLevel(statusData.expLevel);
-                player.setExp(statusData.expProgress);
-            }
-            if (statusDataFlags.contains(StatusDataFlag.SET_GAME_MODE)) {
-                Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () ->
-                        player.setGameMode(GameMode.valueOf(statusData.gameMode)));
-            }
-            if (statusDataFlags.contains(StatusDataFlag.SET_FLYING)) {
-                Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                    if (statusData.isFlying) {
-                        player.setAllowFlight(true);
-                        player.setFlying(true);
-                    }
-                    player.setFlying(false);
-                });
-            }
-        });
-    }
-
-    @Override
-    public CompletableFuture<ItemData> getInventory() {
-        return BukkitSerializer.serializeItemStackArray(player.getInventory().getContents())
-                .thenApply(ItemData::new);
-    }
-
-    @Override
-    public CompletableFuture<Void> setInventory(@NotNull ItemData itemData) {
-        return BukkitSerializer.deserializeInventory(itemData.serializedItems).thenApplyAsync(contents -> {
-            final CompletableFuture<Void> inventorySetFuture = new CompletableFuture<>();
-            Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                player.getInventory().setContents(contents.getContents());
-                inventorySetFuture.complete(null);
-            });
-            return inventorySetFuture.join();
-        });
-    }
-
-    @Override
-    public CompletableFuture<ItemData> getEnderChest() {
-        return BukkitSerializer.serializeItemStackArray(player.getEnderChest().getContents())
-                .thenApply(ItemData::new);
-    }
-
-    @Override
-    public CompletableFuture<Void> setEnderChest(@NotNull ItemData enderChestData) {
-        return BukkitSerializer.deserializeItemStackArray(enderChestData.serializedItems).thenApplyAsync(contents -> {
-            final CompletableFuture<Void> enderChestSetFuture = new CompletableFuture<>();
-            Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                player.getEnderChest().setContents(contents);
-                enderChestSetFuture.complete(null);
-            });
-            return enderChestSetFuture.join();
-        });
-    }
-
-    @Override
-    public CompletableFuture<PotionEffectData> getPotionEffects() {
-        return BukkitSerializer.serializePotionEffectArray(player.getActivePotionEffects()
-                .toArray(new PotionEffect[0])).thenApply(PotionEffectData::new);
-    }
-
-    @Override
-    public CompletableFuture<Void> setPotionEffects(@NotNull PotionEffectData potionEffectData) {
-        return BukkitSerializer.deserializePotionEffectArray(potionEffectData.serializedPotionEffects)
-                .thenApplyAsync(effects -> {
-                    final CompletableFuture<Void> potionEffectsSetFuture = new CompletableFuture<>();
-                    Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                        for (PotionEffect effect : player.getActivePotionEffects()) {
-                            player.removePotionEffect(effect.getType());
-                        }
-                        for (PotionEffect effect : effects) {
-                            player.addPotionEffect(effect);
-                        }
-                        potionEffectsSetFuture.complete(null);
-                    });
-                    return potionEffectsSetFuture.join();
-                });
-    }
-
-    @Override
-    public CompletableFuture<List<AdvancementData>> getAdvancements() {
-        return CompletableFuture.supplyAsync(() -> {
-            final Iterator<Advancement> serverAdvancements = Bukkit.getServer().advancementIterator();
-            final ArrayList<AdvancementData> advancementData = new ArrayList<>();
-
-            // Iterate through the server advancement set and add all advancements to the list
-            serverAdvancements.forEachRemaining(advancement -> {
-                final AdvancementProgress advancementProgress = player.getAdvancementProgress(advancement);
-                final Map<String, Date> awardedCriteria = new HashMap<>();
-
-                advancementProgress.getAwardedCriteria().forEach(criteriaKey -> awardedCriteria.put(criteriaKey,
-                        advancementProgress.getDateAwarded(criteriaKey)));
-
-                // Only save the advancement if criteria has been completed
-                if (!awardedCriteria.isEmpty()) {
-                    advancementData.add(new AdvancementData(advancement.getKey().toString(), awardedCriteria));
-                }
-            });
-            return advancementData;
-        });
-    }
-
-    @Override
-    public CompletableFuture<Void> setAdvancements(@NotNull List<AdvancementData> advancementData) {
-        return CompletableFuture.runAsync(() -> Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-
-            // Temporarily disable advancement announcing if needed
-            boolean announceAdvancementUpdate = false;
-            if (Boolean.TRUE.equals(player.getWorld().getGameRuleValue(GameRule.ANNOUNCE_ADVANCEMENTS))) {
-                player.getWorld().setGameRule(GameRule.ANNOUNCE_ADVANCEMENTS, false);
-                announceAdvancementUpdate = true;
-            }
-            final boolean finalAnnounceAdvancementUpdate = announceAdvancementUpdate;
-
-            // Save current experience and level
-            final int experienceLevel = player.getLevel();
-            final float expProgress = player.getExp();
-
-            // Determines whether the experience might have changed warranting an update
-            final AtomicBoolean correctExperience = new AtomicBoolean(false);
-
-            // Run asynchronously as advancement setting is expensive
-            CompletableFuture.runAsync(() -> {
-                // Apply the advancements to the player
-                final Iterator<Advancement> serverAdvancements = Bukkit.getServer().advancementIterator();
-                while (serverAdvancements.hasNext()) {
-                    // Iterate through all advancements
-                    final Advancement advancement = serverAdvancements.next();
-                    final AdvancementProgress playerProgress = player.getAdvancementProgress(advancement);
-
-                    advancementData.stream().filter(record -> record.key.equals(advancement.getKey().toString())).findFirst().ifPresentOrElse(
-                            // Award all criteria that the player does not have that they do on the cache
-                            record -> {
-                                record.completedCriteria.keySet().stream()
-                                        .filter(criterion -> !playerProgress.getAwardedCriteria().contains(criterion))
-                                        .forEach(criterion -> {
-                                            Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(),
-                                                    () -> player.getAdvancementProgress(advancement).awardCriteria(criterion));
-                                            correctExperience.set(true);
-                                        });
-
-                                // Revoke all criteria that the player does have but should not
-                                new ArrayList<>(playerProgress.getAwardedCriteria()).stream().filter(criterion -> !record.completedCriteria.containsKey(criterion))
-                                        .forEach(criterion -> Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(),
-                                                () -> player.getAdvancementProgress(advancement).revokeCriteria(criterion)));
-
-                            },
-                            // Revoke the criteria as the player shouldn't have any
-                            () -> new ArrayList<>(playerProgress.getAwardedCriteria()).forEach(criterion ->
-                                    Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(),
-                                            () -> player.getAdvancementProgress(advancement).revokeCriteria(criterion))));
-
-                    // Update the player's experience in case the advancement changed that
-                    if (correctExperience.get()) {
-                        player.setLevel(experienceLevel);
-                        player.setExp(expProgress);
-                        correctExperience.set(false);
-                    }
-                }
-
-                // Re-enable announcing advancements (back on main thread again)
-                Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                    if (finalAnnounceAdvancementUpdate) {
-                        player.getWorld().setGameRule(GameRule.ANNOUNCE_ADVANCEMENTS, true);
-                    }
-                });
-            });
-        }));
-    }
-
-    @Override
-    public CompletableFuture<StatisticsData> getStatistics() {
-        return CompletableFuture.supplyAsync(() -> {
-            final Map<String, Integer> untypedStatisticValues = new HashMap<>();
-            final Map<String, Map<String, Integer>> blockStatisticValues = new HashMap<>();
-            final Map<String, Map<String, Integer>> itemStatisticValues = new HashMap<>();
-            final Map<String, Map<String, Integer>> entityStatisticValues = new HashMap<>();
-
-            for (Statistic statistic : Statistic.values()) {
-                switch (statistic.getType()) {
-                    case ITEM -> {
-                        final Map<String, Integer> itemValues = new HashMap<>();
-                        Arrays.stream(Material.values()).filter(Material::isItem)
-                                .filter(itemMaterial -> (player.getStatistic(statistic, itemMaterial)) != 0)
-                                .forEach(itemMaterial -> itemValues.put(itemMaterial.name(),
-                                        player.getStatistic(statistic, itemMaterial)));
-                        if (!itemValues.isEmpty()) {
-                            itemStatisticValues.put(statistic.name(), itemValues);
-                        }
-                    }
-                    case BLOCK -> {
-                        final Map<String, Integer> blockValues = new HashMap<>();
-                        Arrays.stream(Material.values()).filter(Material::isBlock)
-                                .filter(blockMaterial -> (player.getStatistic(statistic, blockMaterial)) != 0)
-                                .forEach(blockMaterial -> blockValues.put(blockMaterial.name(),
-                                        player.getStatistic(statistic, blockMaterial)));
-                        if (!blockValues.isEmpty()) {
-                            blockStatisticValues.put(statistic.name(), blockValues);
-                        }
-                    }
-                    case ENTITY -> {
-                        final Map<String, Integer> entityValues = new HashMap<>();
-                        Arrays.stream(EntityType.values()).filter(EntityType::isAlive)
-                                .filter(entityType -> (player.getStatistic(statistic, entityType)) != 0)
-                                .forEach(entityType -> entityValues.put(entityType.name(),
-                                        player.getStatistic(statistic, entityType)));
-                        if (!entityValues.isEmpty()) {
-                            entityStatisticValues.put(statistic.name(), entityValues);
-                        }
-                    }
-                    case UNTYPED -> {
-                        if (player.getStatistic(statistic) != 0) {
-                            untypedStatisticValues.put(statistic.name(), player.getStatistic(statistic));
-                        }
-                    }
-                }
-            }
-
-            return new StatisticsData(untypedStatisticValues, blockStatisticValues,
-                    itemStatisticValues, entityStatisticValues);
-        });
-    }
-
-    @Override
-    public CompletableFuture<Void> setStatistics(@NotNull StatisticsData statisticsData) {
-        return CompletableFuture.runAsync(() -> {
-            // Set untyped statistics
-            for (String statistic : statisticsData.untypedStatistics.keySet()) {
-                player.setStatistic(Statistic.valueOf(statistic), statisticsData.untypedStatistics.get(statistic));
-            }
-
-            // Set block statistics
-            for (String statistic : statisticsData.blockStatistics.keySet()) {
-                for (String blockMaterial : statisticsData.blockStatistics.get(statistic).keySet()) {
-                    player.setStatistic(Statistic.valueOf(statistic), Material.valueOf(blockMaterial),
-                            statisticsData.blockStatistics.get(statistic).get(blockMaterial));
-                }
-            }
-
-            // Set item statistics
-            for (String statistic : statisticsData.itemStatistics.keySet()) {
-                for (String itemMaterial : statisticsData.itemStatistics.get(statistic).keySet()) {
-                    player.setStatistic(Statistic.valueOf(statistic), Material.valueOf(itemMaterial),
-                            statisticsData.itemStatistics.get(statistic).get(itemMaterial));
-                }
-            }
-
-            // Set entity statistics
-            for (String statistic : statisticsData.entityStatistics.keySet()) {
-                for (String entityType : statisticsData.entityStatistics.get(statistic).keySet()) {
-                    player.setStatistic(Statistic.valueOf(statistic), EntityType.valueOf(entityType),
-                            statisticsData.entityStatistics.get(statistic).get(entityType));
-                }
-            }
-        });
-    }
-
-    @Override
-    public CompletableFuture<LocationData> getLocation() {
-        return CompletableFuture.supplyAsync(() ->
-                new LocationData(player.getWorld().getName(), player.getWorld().getUID(), player.getWorld().getEnvironment().name(),
-                        player.getLocation().getX(), player.getLocation().getY(), player.getLocation().getZ(),
-                        player.getLocation().getYaw(), player.getLocation().getPitch()));
-    }
-
-    @Override
-    public CompletableFuture<Void> setLocation(@NotNull LocationData locationData) {
-        final CompletableFuture<Void> teleportFuture = new CompletableFuture<>();
-        AtomicReference<World> bukkitWorld = new AtomicReference<>(Bukkit.getWorld(locationData.worldName));
-        if (bukkitWorld.get() == null) {
-            bukkitWorld.set(Bukkit.getWorld(locationData.worldUuid));
-        }
-        if (bukkitWorld.get() == null) {
-            Bukkit.getWorlds().stream().filter(world -> world.getEnvironment() == World.Environment
-                    .valueOf(locationData.worldEnvironment)).findFirst().ifPresent(bukkitWorld::set);
-        }
-        if (bukkitWorld.get() != null) {
-            Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> {
-                player.teleport(new Location(bukkitWorld.get(),
-                        locationData.x, locationData.y, locationData.z,
-                        locationData.yaw, locationData.pitch), PlayerTeleportEvent.TeleportCause.PLUGIN);
-                teleportFuture.complete(null);
-            });
-        }
-        return teleportFuture;
-    }
-
-    @Override
-    public CompletableFuture<PersistentDataContainerData> getPersistentDataContainer() {
-        return CompletableFuture.supplyAsync(() -> {
-            final PersistentDataContainer container = player.getPersistentDataContainer();
-            if (container.isEmpty()) {
-                return new PersistentDataContainerData(new HashMap<>());
-            }
-            final HashMap<String, Byte[]> persistentDataMap = new HashMap<>();
-            // Set persistent data keys; ignore keys that we cannot synchronise as byte arrays
-            for (final NamespacedKey key : container.getKeys()) {
-                try {
-                    persistentDataMap.put(key.toString(), ArrayUtils.toObject(container.get(key, PersistentDataType.BYTE_ARRAY)));
-                } catch (IllegalArgumentException | NullPointerException ignored) {
-                }
-            }
-            return new PersistentDataContainerData(persistentDataMap);
-        }).exceptionally(throwable -> {
-            BukkitHuskSync.getInstance().getLoggingAdapter().log(Level.WARNING, "Could not read " + player.getName() + "'s persistent data map, skipping!");
-            throwable.printStackTrace();
-            return new PersistentDataContainerData(new HashMap<>());
-        });
-    }
-
-    @Override
-    public CompletableFuture<Void> setPersistentDataContainer(@NotNull PersistentDataContainerData persistentDataContainerData) {
-        return CompletableFuture.runAsync(() -> {
-            player.getPersistentDataContainer().getKeys().forEach(namespacedKey ->
-                    player.getPersistentDataContainer().remove(namespacedKey));
-            persistentDataContainerData.persistentDataMap.keySet().forEach(keyString -> {
-                final NamespacedKey key = NamespacedKey.fromString(keyString);
-                if (key != null) {
-                    final byte[] data = ArrayUtils.toPrimitive(persistentDataContainerData
-                            .persistentDataMap.get(keyString));
-                    player.getPersistentDataContainer().set(key, PersistentDataType.BYTE_ARRAY, data);
-                }
-            });
-        });
-    }
-
-    @Override
-    public boolean isOffline() {
-        try {
-            return player == null;
-        } catch (Exception e) {
-            e.printStackTrace();
-            throw e;
-        }
-    }
-
-    @NotNull
-    @Override
-    public Version getMinecraftVersion() {
-        return Version.minecraftVersion(Bukkit.getBukkitVersion());
-    }
-
-    @Override
-    public boolean hasPermission(@NotNull String node) {
-        return player.hasPermission(node);
-    }
-
-    @Override
-    public void showMenu(@NotNull ItemEditorMenu menu) {
-        BukkitSerializer.deserializeItemStackArray(menu.itemData.serializedItems).thenAccept(inventoryContents -> {
-            final Inventory inventory = Bukkit.createInventory(player, menu.itemEditorMenuType.slotCount,
-                    BaseComponent.toLegacyText(menu.menuTitle.toComponent()));
-            inventory.setContents(inventoryContents);
-            Bukkit.getScheduler().runTask(BukkitHuskSync.getInstance(), () -> player.openInventory(inventory));
-        });
-    }
-
-    @Override
-    public void sendActionBar(@NotNull MineDown mineDown) {
-        player.spigot().sendMessage(ChatMessageType.ACTION_BAR, mineDown.replace().toComponent());
-    }
-
-    @Override
-    public void sendMessage(@NotNull MineDown mineDown) {
-        player.spigot().sendMessage(mineDown.replace().toComponent());
-    }
-
-    /**
-     * Returns a {@link Player}'s maximum health, minus any health boost effects
-     *
-     * @param player The {@link Player} to get the maximum health of
-     * @return The {@link Player}'s max health
-     */
-    private static double getMaxHealth(@NotNull Player player) {
-        double maxHealth = Objects.requireNonNull(player.getAttribute(Attribute.GENERIC_MAX_HEALTH)).getBaseValue();
-
-        // If the player has additional health bonuses from synchronised potion effects, subtract these from this number as they are synchronised separately
-        if (player.hasPotionEffect(PotionEffectType.HEALTH_BOOST) && maxHealth > 20D) {
-            PotionEffect healthBoostEffect = player.getPotionEffect(PotionEffectType.HEALTH_BOOST);
-            assert healthBoostEffect != null;
-            double healthBoostBonus = 4 * (healthBoostEffect.getAmplifier() + 1);
-            maxHealth -= healthBoostBonus;
-        }
-        return maxHealth;
-    }
-
-}

bukkit/src/main/java/net/william278/husksync/user/BukkitUser.java

@@ -0,0 +1,128 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.user;
+
+import de.themoep.minedown.adventure.MineDown;
+import dev.triumphteam.gui.builder.gui.StorageBuilder;
+import dev.triumphteam.gui.guis.Gui;
+import dev.triumphteam.gui.guis.StorageGui;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.data.BukkitUserDataHolder;
+import net.william278.husksync.data.Data;
+import org.bukkit.entity.Player;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Arrays;
+import java.util.function.Consumer;
+import java.util.logging.Level;
+
+/**
+ * Bukkit platform implementation of an {@link OnlineUser}
+ */
+public class BukkitUser extends OnlineUser implements BukkitUserDataHolder {
+
+    private final HuskSync plugin;
+    private final Player player;
+
+    private BukkitUser(@NotNull Player player, @NotNull HuskSync plugin) {
+        super(player.getUniqueId(), player.getName());
+        this.player = player;
+        this.plugin = plugin;
+    }
+
+    @NotNull
+    @ApiStatus.Internal
+    public static BukkitUser adapt(@NotNull Player player, @NotNull HuskSync plugin) {
+        return new BukkitUser(player, plugin);
+    }
+
+    @Override
+    public boolean hasDisconnected() {
+        return getPlugin().getDisconnectingPlayers().contains(getUuid())
+                || player == null || !player.isOnline();
+    }
+
+    @Override
+    @Deprecated(since = "3.6.7")
+    public void sendToast(@NotNull MineDown title, @NotNull MineDown description,
+                          @NotNull String iconMaterial, @NotNull String backgroundType) {
+        plugin.log(Level.WARNING, "Toast notifications are deprecated. " +
+                                  "Please change your notification display slot to CHAT, ACTION_BAR or NONE.");
+        this.sendActionBar(title);
+    }
+
+    @Override
+    public void showGui(@NotNull Data.Items items, @NotNull MineDown title, boolean editable, int size,
+                        @NotNull Consumer<Data.Items> onClose) {
+        final ItemStack[] contents = ((BukkitData.Items) items).getContents();
+        final StorageBuilder builder = Gui.storage().rows((int) Math.ceil(size / 9.0d));
+        if (!editable) {
+            builder.disableAllInteractions();
+        }
+        final StorageGui gui = builder
+                .apply(a -> a.getInventory().setContents(contents))
+                .title(title.toComponent()).create();
+        gui.setCloseGuiAction((close) -> onClose.accept(BukkitData.Items.ItemArray.adapt(
+                Arrays.stream(close.getInventory().getContents()).limit(size).toArray(ItemStack[]::new)
+        )));
+        plugin.runSync(() -> gui.open(player), this);
+    }
+
+    @Override
+    public boolean hasPermission(@NotNull String node) {
+        return player.hasPermission(node);
+    }
+
+    @Override
+    public boolean isDead() {
+        return player.getHealth() <= 0;
+    }
+
+    @Override
+    public boolean isLocked() {
+        return plugin.getLockedPlayers().contains(player.getUniqueId());
+    }
+
+    @Override
+    public boolean isNpc() {
+        return player.hasMetadata("NPC");
+    }
+
+    /**
+     * Get the Bukkit {@link Player} instance of this user
+     *
+     * @return the {@link Player} instance
+     * @since 3.6
+     */
+    @NotNull
+    public Player getPlayer() {
+        return player;
+    }
+
+    @NotNull
+    @Override
+    @ApiStatus.Internal
+    public HuskSync getPlugin() {
+        return plugin;
+    }
+}

bukkit/src/main/java/net/william278/husksync/util/BukkitKeyedAdapter.java

@@ -0,0 +1,62 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.util;
+
+import org.bukkit.*;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.entity.EntityType;
+import org.bukkit.potion.PotionEffectType;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+// Utility class for adapting "Keyed" Bukkit objects
+public final class BukkitKeyedAdapter {
+
+    @Nullable
+    public static Statistic matchStatistic(@NotNull String key) {
+        return getRegistryValue(Registry.STATISTIC, key);
+    }
+
+    @Nullable
+    public static EntityType matchEntityType(@NotNull String key) {
+        return getRegistryValue(Registry.ENTITY_TYPE, key);
+    }
+
+    @Nullable
+    public static Material matchMaterial(@NotNull String key) {
+        return getRegistryValue(Registry.MATERIAL, key);
+    }
+
+    @Nullable
+    public static Attribute matchAttribute(@NotNull String key) {
+        return getRegistryValue(Registry.ATTRIBUTE, key);
+    }
+
+    @Nullable
+    public static PotionEffectType matchEffectType(@NotNull String key) {
+        return getRegistryValue(Registry.EFFECT, key);
+    }
+
+    private static <T extends Keyed> T getRegistryValue(@NotNull Registry<T> registry, @NotNull String keyString) {
+        final NamespacedKey key = NamespacedKey.fromString(keyString);
+        return key != null ? registry.get(key) : null;
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/util/BukkitLegacyConverter.java

@@ -0,0 +1,293 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.util;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.adapter.DataAdapter;
+import net.william278.husksync.data.BukkitData;
+import net.william278.husksync.data.Data;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.data.Identifier;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.util.io.BukkitObjectInputStream;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.json.JSONArray;
+import org.json.JSONObject;
+import org.yaml.snakeyaml.external.biz.base64Coder.Base64Coder;
+
+import java.io.ByteArrayInputStream;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.time.OffsetDateTime;
+import java.util.*;
+import java.util.logging.Level;
+
+import static net.william278.husksync.util.BukkitKeyedAdapter.matchEntityType;
+import static net.william278.husksync.util.BukkitKeyedAdapter.matchMaterial;
+
+public class BukkitLegacyConverter extends LegacyConverter {
+
+    public BukkitLegacyConverter(@NotNull HuskSync plugin) {
+        super(plugin);
+    }
+
+    @Override
+    @NotNull
+    public DataSnapshot.Packed convert(byte @NotNull [] data, @NotNull UUID id,
+                                       @NotNull OffsetDateTime timestamp) throws DataAdapter.AdaptionException {
+        final JSONObject object = new JSONObject(plugin.getDataAdapter().bytesToString(data));
+        final int version = object.getInt("format_version");
+        if (version != 3) {
+            plugin.log(Level.WARNING, String.format("Converting data from older v2 data format (%s).", version));
+        }
+
+        // Read legacy data from the JSON object
+        final DataSnapshot.Builder builder = DataSnapshot.builder(plugin)
+                .id(id).timestamp(timestamp)
+                .saveCause(DataSnapshot.SaveCause.CONVERTED_FROM_V2)
+                .data(readStatusData(object));
+        readInventory(object).ifPresent(builder::inventory);
+        readEnderChest(object).ifPresent(builder::enderChest);
+        readLocation(object).ifPresent(builder::location);
+        readAdvancements(object).ifPresent(builder::advancements);
+        readStatistics(object).ifPresent(builder::statistics);
+        return builder.buildAndPack();
+    }
+
+    @NotNull
+    private Map<Identifier, Data> readStatusData(@NotNull JSONObject object) {
+        if (!object.has("status_data")) {
+            return Map.of();
+        }
+
+        final JSONObject status = object.getJSONObject("status_data");
+        final HashMap<Identifier, Data> containers = Maps.newHashMap();
+        if (Identifier.HEALTH.isEnabled()) {
+            containers.put(Identifier.HEALTH, BukkitData.Health.from(
+                    status.getDouble("health"),
+                    status.getDouble("health_scale"),
+                    false
+            ));
+        }
+        if (Identifier.HUNGER.isEnabled()) {
+            containers.put(Identifier.HUNGER, BukkitData.Hunger.from(
+                    status.getInt("hunger"),
+                    status.getFloat("saturation"),
+                    status.getFloat("saturation_exhaustion")
+            ));
+        }
+        if (Identifier.EXPERIENCE.isEnabled()) {
+            containers.put(Identifier.EXPERIENCE, BukkitData.Experience.from(
+                    status.getInt("total_experience"),
+                    status.getInt("experience_level"),
+                    status.getFloat("experience_progress")
+            ));
+        }
+        if (Identifier.GAME_MODE.isEnabled()) {
+            containers.put(Identifier.GAME_MODE, BukkitData.GameMode.from(
+                    status.getString("game_mode")
+            ));
+        }
+        if (Identifier.FLIGHT_STATUS.isEnabled()) {
+            containers.put(Identifier.FLIGHT_STATUS, BukkitData.FlightStatus.from(
+                    status.getBoolean("is_flying"),
+                    status.getBoolean("is_flying")
+            ));
+        }
+        return containers;
+    }
+
+    @NotNull
+    private Optional<Data.Items.Inventory> readInventory(@NotNull JSONObject object) {
+        if (!object.has("inventory") || !Identifier.INVENTORY.isEnabled()) {
+            return Optional.empty();
+        }
+
+        final JSONObject inventoryData = object.getJSONObject("inventory");
+        return Optional.of(BukkitData.Items.Inventory.from(
+                deserializeLegacyItemStacks(inventoryData.getString("serialized_items")), 0
+        ));
+    }
+
+    @NotNull
+    private Optional<Data.Items.EnderChest> readEnderChest(@NotNull JSONObject object) {
+        if (!object.has("ender_chest") || !Identifier.ENDER_CHEST.isEnabled()) {
+            return Optional.empty();
+        }
+
+        final JSONObject inventoryData = object.getJSONObject("ender_chest");
+        return Optional.of(BukkitData.Items.EnderChest.adapt(
+                deserializeLegacyItemStacks(inventoryData.getString("serialized_items"))
+        ));
+    }
+
+    @NotNull
+    private Optional<Data.Location> readLocation(@NotNull JSONObject object) {
+        if (!object.has("location") || !Identifier.LOCATION.isEnabled()) {
+            return Optional.empty();
+        }
+
+        final JSONObject locationData = object.getJSONObject("location");
+        return Optional.of(BukkitData.Location.from(
+                locationData.getDouble("x"),
+                locationData.getDouble("y"),
+                locationData.getDouble("z"),
+                locationData.getFloat("yaw"),
+                locationData.getFloat("pitch"),
+                new Data.Location.World(
+                        locationData.getString("world_name"),
+                        UUID.fromString(locationData.getString("world_uuid")),
+                        locationData.getString("world_environment")
+                )
+        ));
+    }
+
+    @NotNull
+    private Optional<Data.Advancements> readAdvancements(@NotNull JSONObject object) {
+        if (!object.has("advancements") || !Identifier.ADVANCEMENTS.isEnabled()) {
+            return Optional.empty();
+        }
+
+        final JSONArray advancements = object.getJSONArray("advancements");
+        final List<Data.Advancements.Advancement> converted = Lists.newArrayList();
+        advancements.iterator().forEachRemaining(o -> {
+            final JSONObject advancement = (JSONObject) JSONObject.wrap(o);
+            final String key = advancement.getString("key");
+
+            final JSONObject criteria = advancement.getJSONObject("completed_criteria");
+            final Map<String, Date> criteriaMap = new LinkedHashMap<>();
+            criteria.keys().forEachRemaining(criteriaKey -> criteriaMap.put(
+                    criteriaKey, parseDate(criteria.getString(criteriaKey)))
+            );
+            converted.add(Data.Advancements.Advancement.adapt(key, criteriaMap));
+        });
+
+        return Optional.of(BukkitData.Advancements.from(converted));
+    }
+
+    @NotNull
+    private Optional<Data.Statistics> readStatistics(@NotNull JSONObject object) {
+        if (!object.has("statistics") || !Identifier.STATISTICS.isEnabled()) {
+            return Optional.empty();
+        }
+
+        final JSONObject stats = object.getJSONObject("statistics");
+        return Optional.of(readStatisticMaps(
+                stats.getJSONObject("untyped_statistics"),
+                stats.getJSONObject("block_statistics"),
+                stats.getJSONObject("item_statistics"),
+                stats.getJSONObject("entity_statistics")
+        ));
+    }
+
+    @NotNull
+    private BukkitData.Statistics readStatisticMaps(@NotNull JSONObject untyped, @NotNull JSONObject blocks,
+                                                    @NotNull JSONObject items, @NotNull JSONObject entities) {
+        // Read generic stats
+        final Map<String, Integer> genericStats = Maps.newHashMap();
+        untyped.keys().forEachRemaining(stat -> genericStats.put(stat, untyped.getInt(stat)));
+
+        // Read block & item stats
+        final Map<String, Map<String, Integer>> blockStats, itemStats, entityStats;
+        blockStats = readMaterialStatistics(blocks);
+        itemStats = readMaterialStatistics(items);
+
+        // Read entity stats
+        entityStats = Maps.newHashMap();
+        entities.keys().forEachRemaining(stat -> {
+            final JSONObject entityStat = entities.getJSONObject(stat);
+            final Map<String, Integer> entityMap = Maps.newHashMap();
+            entityStat.keys().forEachRemaining(entity -> {
+                if (matchEntityType(entity) != null) {
+                    entityMap.put(entity, entityStat.getInt(entity));
+                }
+            });
+            entityStats.put(stat, entityMap);
+        });
+
+        return BukkitData.Statistics.from(genericStats, blockStats, itemStats, entityStats);
+    }
+
+    @NotNull
+    private Map<String, Map<String, Integer>> readMaterialStatistics(@NotNull JSONObject items) {
+        final Map<String, Map<String, Integer>> itemStats = Maps.newHashMap();
+        items.keys().forEachRemaining(stat -> {
+            final JSONObject itemStat = items.getJSONObject(stat);
+            final Map<String, Integer> itemMap = Maps.newHashMap();
+            itemStat.keys().forEachRemaining(item -> {
+                if (matchMaterial(item) != null) {
+                    itemMap.put(item, itemStat.getInt(item));
+                }
+            });
+            itemStats.put(stat, itemMap);
+        });
+        return itemStats;
+    }
+
+    // Deserialize a legacy item stack array
+    @NotNull
+    public ItemStack[] deserializeLegacyItemStacks(@NotNull String items) {
+        // Return an empty array if there is no inventory data (set the player as having an empty inventory)
+        if (items.isEmpty()) {
+            return new ItemStack[0];
+        }
+
+        // Create a byte input stream to read the serialized data
+        try (ByteArrayInputStream byteInputStream = new ByteArrayInputStream(Base64Coder.decodeLines(items))) {
+            try (BukkitObjectInputStream bukkitInputStream = new BukkitObjectInputStream(byteInputStream)) {
+                // Read the length of the Bukkit input stream and set the length of the array to this value
+                final ItemStack[] inventoryContents = new ItemStack[bukkitInputStream.readInt()];
+
+                // Set the ItemStacks in the array from deserialized ItemStack data
+                int slotIndex = 0;
+                for (ItemStack ignored : inventoryContents) {
+                    final ItemStack deserialized = deserializeLegacyItemStack(bukkitInputStream.readObject());
+                    inventoryContents[slotIndex] = deserialized;
+                    slotIndex++;
+                }
+
+                // Return the converted contents
+                return inventoryContents;
+            }
+        } catch (Throwable e) {
+            throw new DataAdapter.AdaptionException("Failed to deserialize legacy item stack data", e);
+        }
+    }
+
+    // Deserialize a single legacy item stack
+    @SuppressWarnings("unchecked")
+    @Nullable
+    private static ItemStack deserializeLegacyItemStack(@Nullable Object serializedItemStack) {
+        return serializedItemStack != null ? ItemStack.deserialize((Map<String, Object>) serializedItemStack) : null;
+    }
+
+    @NotNull
+    private Date parseDate(@NotNull String dateString) {
+        try {
+            return new SimpleDateFormat().parse(dateString);
+        } catch (ParseException e) {
+            return new Date();
+        }
+    }
+
+}

bukkit/src/main/java/net/william278/husksync/util/BukkitLogger.java

@@ -1,47 +0,0 @@
-package net.william278.husksync.util;
-
-import de.themoep.minedown.MineDown;
-import net.md_5.bungee.api.chat.TextComponent;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.logging.Level;
-
-public class BukkitLogger extends Logger {
-
-    private final java.util.logging.Logger logger;
-
-    public BukkitLogger(@NotNull java.util.logging.Logger logger) {
-        this.logger = logger;
-    }
-
-    @Override
-    public void log(@NotNull Level level, @NotNull String message, @NotNull Exception e) {
-        logger.log(level, message, e);
-    }
-
-    @Override
-    public void log(@NotNull Level level, @NotNull String message) {
-        logger.log(level, message);
-    }
-
-    @Override
-    public void log(@NotNull Level level, @NotNull MineDown mineDown) {
-        logger.log(level, TextComponent.toLegacyText(mineDown.toComponent()));
-    }
-
-    @Override
-    public void info(@NotNull String message) {
-        logger.info(message);
-    }
-
-    @Override
-    public void severe(@NotNull String message) {
-        logger.severe(message);
-    }
-
-    @Override
-    public void config(@NotNull String message) {
-        logger.config(message);
-    }
-
-}

bukkit/src/main/java/net/william278/husksync/util/BukkitResourceReader.java

@@ -1,28 +0,0 @@
-package net.william278.husksync.util;
-
-import net.william278.husksync.BukkitHuskSync;
-import org.jetbrains.annotations.NotNull;
-
-import java.io.File;
-import java.io.InputStream;
-import java.util.Objects;
-
-public class BukkitResourceReader implements ResourceReader {
-
-    private final BukkitHuskSync plugin;
-
-    public BukkitResourceReader(BukkitHuskSync plugin) {
-        this.plugin = plugin;
-    }
-
-    @Override
-    public @NotNull InputStream getResource(String fileName) {
-        return Objects.requireNonNull(plugin.getResource(fileName));
-    }
-
-    @Override
-    public @NotNull File getDataFolder() {
-        return plugin.getDataFolder();
-    }
-
-}

bukkit/src/main/java/net/william278/husksync/util/BukkitTask.java

@@ -0,0 +1,190 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.util;
+
+import net.william278.husksync.BukkitHuskSync;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.data.UserDataHolder;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import space.arim.morepaperlib.scheduling.AsynchronousScheduler;
+import space.arim.morepaperlib.scheduling.AttachedScheduler;
+import space.arim.morepaperlib.scheduling.RegionalScheduler;
+import space.arim.morepaperlib.scheduling.ScheduledTask;
+
+import java.time.Duration;
+import java.time.temporal.ChronoUnit;
+
+public interface BukkitTask extends Task {
+
+    class Sync extends Task.Sync implements BukkitTask {
+
+        private ScheduledTask task;
+        private final @Nullable UserDataHolder user;
+
+        protected Sync(@NotNull HuskSync plugin, @NotNull Runnable runnable,
+                       @Nullable UserDataHolder user, long delayTicks) {
+            super(plugin, runnable, delayTicks);
+            this.user = user;
+        }
+
+        @Override
+        public void cancel() {
+            if (task != null && !cancelled) {
+                task.cancel();
+            }
+            super.cancel();
+        }
+
+        @Override
+        public void run() {
+            if (isPluginDisabled()) {
+                runnable.run();
+                return;
+            }
+            if (cancelled) {
+                return;
+            }
+
+            // Use entity-specific scheduler if user is not null
+            if (user != null) {
+                final AttachedScheduler scheduler = ((BukkitHuskSync) getPlugin()).getUserSyncScheduler(user);
+                if (delayTicks > 0) {
+                    this.task = scheduler.runDelayed(runnable, null, delayTicks);
+                } else {
+                    this.task = scheduler.run(runnable, null);
+                }
+                return;
+            }
+
+            // Or default to the global scheduler
+            final RegionalScheduler scheduler = ((BukkitHuskSync) getPlugin()).getSyncScheduler();
+            if (delayTicks > 0) {
+                this.task = scheduler.runDelayed(runnable, delayTicks);
+            } else {
+                this.task = scheduler.run(runnable);
+            }
+        }
+    }
+
+    class Async extends Task.Async implements BukkitTask {
+
+        private ScheduledTask task;
+
+        protected Async(@NotNull HuskSync plugin, @NotNull Runnable runnable, long delayTicks) {
+            super(plugin, runnable, delayTicks);
+        }
+
+        @Override
+        public void cancel() {
+            if (task != null && !cancelled) {
+                task.cancel();
+            }
+            super.cancel();
+        }
+
+        @Override
+        public void run() {
+            if (isPluginDisabled()) {
+                runnable.run();
+                return;
+            }
+            if (cancelled) {
+                return;
+            }
+
+            final AsynchronousScheduler scheduler = ((BukkitHuskSync) getPlugin()).getAsyncScheduler();
+            if (delayTicks > 0) {
+                plugin.debug("Running async task with delay of " + delayTicks + " ticks");
+                this.task = scheduler.runDelayed(
+                        runnable,
+                        Duration.of(delayTicks * 50L, ChronoUnit.MILLIS)
+                );
+            } else {
+                this.task = scheduler.run(runnable);
+            }
+        }
+    }
+
+    class Repeating extends Task.Repeating implements BukkitTask {
+
+        private ScheduledTask task;
+
+        protected Repeating(@NotNull HuskSync plugin, @NotNull Runnable runnable, long repeatingTicks) {
+            super(plugin, runnable, repeatingTicks);
+        }
+
+        @Override
+        public void cancel() {
+            if (task != null && !cancelled) {
+                task.cancel();
+            }
+            super.cancel();
+        }
+
+        @Override
+        public void run() {
+            if (isPluginDisabled()) {
+                return;
+            }
+
+            if (!cancelled) {
+                final AsynchronousScheduler scheduler = ((BukkitHuskSync) getPlugin()).getAsyncScheduler();
+                this.task = scheduler.runAtFixedRate(
+                        runnable, Duration.ZERO,
+                        Duration.of(repeatingTicks * 50L, ChronoUnit.MILLIS)
+                );
+            }
+        }
+    }
+
+    // Returns if the Bukkit HuskSync plugin is disabled
+    default boolean isPluginDisabled() {
+        return !((BukkitHuskSync) getPlugin()).isEnabled();
+    }
+
+    interface Supplier extends Task.Supplier {
+
+        @NotNull
+        @Override
+        default Task.Sync getSyncTask(@NotNull Runnable runnable, @Nullable UserDataHolder user, long delayTicks) {
+            return new Sync(getPlugin(), runnable, user, delayTicks);
+        }
+
+        @NotNull
+        @Override
+        default Task.Async getAsyncTask(@NotNull Runnable runnable, long delayTicks) {
+            return new Async(getPlugin(), runnable, delayTicks);
+        }
+
+        @NotNull
+        @Override
+        default Task.Repeating getRepeatingTask(@NotNull Runnable runnable, long repeatingTicks) {
+            return new Repeating(getPlugin(), runnable, repeatingTicks);
+        }
+
+        @Override
+        default void cancelTasks() {
+            ((BukkitHuskSync) getPlugin()).getScheduler().cancelGlobalTasks();
+        }
+
+    }
+
+}

bukkit/src/main/resources/compatibility.yml

@@ -0,0 +1,2 @@
+# File used for checking Minecraft server compatibility with this version of HuskSync
+minecraft_version_range: '${minecraft_version_range}'

bukkit/src/main/resources/paper-libraries.yml

@@ -0,0 +1,8 @@
+# Dependencies for HuskSync on Paper
+libraries:
+  - 'redis.clients:jedis:${jedis_version}'
+  - 'com.mysql:mysql-connector-j:${mysql_driver_version}'
+  - 'org.mariadb.jdbc:mariadb-java-client:${mariadb_driver_version}'
+  - 'org.postgresql:postgresql:${postgres_driver_version}'
+  - 'org.mongodb:mongodb-driver-sync:${mongodb_driver_version}'
+  - 'org.xerial.snappy:snappy-java:${snappy_version}'

bukkit/src/main/resources/paper-plugin.yml

@@ -0,0 +1,27 @@
+name: 'HuskSync'
+description: '${description}'
+author: 'William278'
+website: 'https://william278.net/'
+main: 'net.william278.husksync.PaperHuskSync'
+loader: 'net.william278.husksync.PaperHuskSyncLoader'
+version: '${version}'
+api-version: '${minecraft_api_version}'
+folia-supported: true
+dependencies:
+  server:
+    packetevents:
+      required: false
+      load: BEFORE
+      join-classpath: true
+    ProtocolLib:
+      required: false
+      load: BEFORE
+      join-classpath: true
+    MysqlPlayerDataBridge:
+      required: false
+      load: BEFORE
+      join-classpath: true
+    Plan:
+      required: false
+      load: BEFORE
+      join-classpath: true

bukkit/src/main/resources/plugin.yml

@@ -1,27 +1,20 @@
-name: HuskSync
-version: ${version}
-main: net.william278.husksync.BukkitHuskSync
-api-version: 1.16
-author: William278
-description: 'A modern, cross-server player data synchronization system'
+name: 'HuskSync'
+version: '${version}'
+main: 'net.william278.husksync.BukkitHuskSync'
+api-version: '${minecraft_api_version}'
+author: 'William278'
+description: '${description}'
 website: 'https://william278.net'
+folia-supported: true
 softdepend:
-  - MysqlPlayerDataBridge
-  - Plan
+  - 'packetevents'
+  - 'ProtocolLib'
+  - 'MysqlPlayerDataBridge'
+  - 'Plan'
 libraries:
-  - 'mysql:mysql-connector-java:8.0.29'
-  - 'org.xerial.snappy:snappy-java:1.1.8.4'
-  - 'dev.dejvokep:boosted-yaml:1.2'
-commands:
-  husksync:
-    usage: '/husksync <update/info/reload/migrate>'
-    description: 'Manage the HuskSync plugin'
-  userdata:
-    usage: '/userdata <view/list/delete/restore/pin> <username> [version_uuid]'
-    description: 'View, manage & restore player userdata'
-  inventory:
-    usage: '/inventory <username> [version_uuid]'
-    description: 'View & edit a player''s inventory'
-  enderchest:
-    usage: '/enderchest <username> [version_uuid]'
-    description: 'View & edit a player''s Ender Chest'
+  - 'redis.clients:jedis:${jedis_version}'
+  - 'com.mysql:mysql-connector-j:${mysql_driver_version}'
+  - 'org.mariadb.jdbc:mariadb-java-client:${mariadb_driver_version}'
+  - 'org.postgresql:postgresql:${postgres_driver_version}'
+  - 'org.mongodb:mongodb-driver-sync:${mongodb_driver_version}'
+  - 'org.xerial.snappy:snappy-java:${snappy_version}'

common/build.gradle

@@ -1,31 +1,46 @@
-dependencies {
-    implementation 'commons-io:commons-io:2.11.0'
-    implementation 'de.themoep:minedown:1.7.1-SNAPSHOT'
-    implementation 'com.google.code.gson:gson:2.9.0'
-    implementation('redis.clients:jedis:4.2.3') {
-        exclude module: 'slf4j-api'
-    }
-    implementation ('com.zaxxer:HikariCP:5.0.1') {
-        exclude module: 'slf4j-api'
-    }
-
-    compileOnly 'dev.dejvokep:boosted-yaml:1.2'
-    compileOnly 'org.xerial.snappy:snappy-java:1.1.8.4'
-    compileOnly 'org.jetbrains:annotations:23.0.0'
-    compileOnly 'com.github.plan-player-analytics:Plan:5.4.1690'
-
-    testImplementation 'org.xerial.snappy:snappy-java:1.1.8.4'
-    testImplementation 'com.github.plan-player-analytics:Plan:5.4.1690'
-    testCompileOnly 'org.jetbrains:annotations:23.0.0'
+plugins {
+    id 'java-library'
 }
 
-shadowJar {
-    relocate 'org.apache', 'net.william278.husksync.libraries'
-    relocate 'de.themoep', 'net.william278.husksync.libraries'
-    relocate 'org.jetbrains', 'net.william278.husksync.libraries'
-    relocate 'org.intellij', 'net.william278.husksync.libraries'
-    relocate 'com.zaxxer', 'net.william278.husksync.libraries'
-    relocate 'com.google', 'net.william278.husksync.libraries'
-    relocate 'redis.clients', 'net.william278.husksync.libraries'
-    relocate 'org.json', 'net.william278.husksync.libraries.json'
+dependencies {
+    api 'commons-io:commons-io:2.21.0'
+    api 'org.apache.commons:commons-text:1.14.0'
+    api 'net.william278:minedown:1.8.2'
+    api 'net.william278:mapdataapi:2.0'
+    api 'org.json:json:20250517'
+    api 'com.google.code.gson:gson:2.13.2'
+    api 'com.fatboyindustrial.gson-javatime-serialisers:gson-javatime-serialisers:1.1.2'
+    api 'de.exlll:configlib-yaml:4.6.4'
+    api 'net.william278:paginedown:1.1.2'
+    api 'net.william278:DesertWell:2.0.4'
+    api('com.zaxxer:HikariCP:7.0.2') {
+        exclude module: 'slf4j-api'
+    }
+
+    compileOnlyApi 'net.william278.toilet:toilet-common:1.0.16'
+
+    compileOnly 'net.william278.uniform:uniform-common:1.3.9'
+    compileOnly 'com.mojang:brigadier:1.1.8'
+    compileOnly 'org.projectlombok:lombok:1.18.42'
+    compileOnly 'org.jetbrains:annotations:26.0.2-1'
+    compileOnly 'net.kyori:adventure-api:4.25.0'
+    compileOnly 'net.kyori:adventure-platform-api:4.4.0'
+    compileOnly "net.kyori:adventure-text-serializer-plain:4.25.0"
+    compileOnly 'com.google.guava:guava:33.5.0-jre'
+    compileOnly 'com.github.plan-player-analytics:Plan:5.6.2965'
+    compileOnly "redis.clients:jedis:$jedis_version"
+    compileOnly "com.mysql:mysql-connector-j:$mysql_driver_version"
+    compileOnly "org.mariadb.jdbc:mariadb-java-client:$mariadb_driver_version"
+    compileOnly "org.postgresql:postgresql:$postgres_driver_version"
+    compileOnly "org.mongodb:mongodb-driver-sync:$mongodb_driver_version"
+    compileOnly "org.xerial.snappy:snappy-java:$snappy_version"
+
+    testImplementation "redis.clients:jedis:$jedis_version"
+    testImplementation "org.xerial.snappy:snappy-java:$snappy_version"
+    testImplementation 'com.google.guava:guava:33.5.0-jre'
+    testImplementation 'com.github.plan-player-analytics:Plan:5.6.2965'
+    testCompileOnly 'de.exlll:configlib-yaml:4.6.4'
+    testCompileOnly 'org.jetbrains:annotations:26.0.2-1'
+
+    annotationProcessor 'org.projectlombok:lombok:1.18.42'
 }

common/src/main/java/net/william278/husksync/HuskSync.java

@@ -1,28 +1,62 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync;
 
-import net.william278.husksync.config.Locales;
-import net.william278.husksync.config.Settings;
-import net.william278.husksync.data.DataAdapter;
-import net.william278.husksync.editor.DataEditor;
+import com.fatboyindustrial.gsonjavatime.Converters;
+import com.google.common.collect.Maps;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.platform.AudienceProvider;
+import net.william278.desertwell.util.ThrowingConsumer;
+import net.william278.desertwell.util.UpdateChecker;
+import net.william278.desertwell.util.Version;
+import net.william278.husksync.adapter.DataAdapter;
+import net.william278.husksync.config.ConfigProvider;
+import net.william278.husksync.data.Data;
+import net.william278.husksync.data.Identifier;
+import net.william278.husksync.data.SerializerRegistry;
 import net.william278.husksync.database.Database;
-import net.william278.husksync.event.EventCannon;
+import net.william278.husksync.event.EventDispatcher;
+import net.william278.husksync.listener.LockedHandler;
 import net.william278.husksync.migrator.Migrator;
-import net.william278.husksync.player.OnlineUser;
 import net.william278.husksync.redis.RedisManager;
-import net.william278.husksync.util.Logger;
-import net.william278.husksync.util.Version;
+import net.william278.husksync.sync.DataSyncer;
+import net.william278.husksync.user.ConsoleUser;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.util.*;
+import net.william278.uniform.Uniform;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.List;
-import java.util.Optional;
-import java.util.Set;
-import java.util.UUID;
-import java.util.concurrent.CompletableFuture;
+import java.io.InputStream;
+import java.text.SimpleDateFormat;
+import java.util.*;
+import java.util.logging.Level;
 
 /**
  * Abstract implementation of the HuskSync plugin.
  */
-public interface HuskSync {
+public interface HuskSync extends Task.Supplier, EventDispatcher, ConfigProvider, SerializerRegistry,
+        CompatibilityChecker, DumpProvider, DataVersionSupplier {
+
+    int SPIGOT_RESOURCE_ID = 97144;
 
     /**
      * Returns a set of online players.
@@ -54,33 +88,39 @@ public interface HuskSync {
      *
      * @return the {@link RedisManager} implementation
      */
-
     @NotNull
     RedisManager getRedisManager();
 
     /**
-     * Returns the data adapter implementation
+     * Returns the implementing adapter for serializing data
      *
-     * @return the {@link DataAdapter} implementation
+     * @return the {@link DataAdapter}
      */
     @NotNull
     DataAdapter getDataAdapter();
 
     /**
-     * Returns the data editor implementation
+     * Returns the data syncer implementation
      *
-     * @return the {@link DataEditor} implementation
+     * @return the {@link DataSyncer} implementation
      */
     @NotNull
-    DataEditor getDataEditor();
+    DataSyncer getDataSyncer();
 
     /**
-     * Returns the event firing cannon
+     * Set the data syncer implementation
      *
-     * @return the {@link EventCannon} implementation
+     * @param dataSyncer the {@link DataSyncer} implementation
+     */
+    void setDataSyncer(@NotNull DataSyncer dataSyncer);
+
+    /**
+     * Get the uniform command provider
+     *
+     * @return the command provider
      */
     @NotNull
-    EventCannon getEventCannon();
+    Uniform getUniform();
 
     /**
      * Returns a list of available data {@link Migrator}s
@@ -90,29 +130,108 @@ public interface HuskSync {
     @NotNull
     List<Migrator> getAvailableMigrators();
 
-    /**
-     * Returns the plugin {@link Settings}
-     *
-     * @return the {@link Settings}
-     */
     @NotNull
-    Settings getSettings();
+    Map<UUID, Map<Identifier, Data>> getPlayerCustomDataStore();
+
+    @NotNull
+    default Map<Identifier, Data> getPlayerCustomDataStore(@NotNull OnlineUser user) {
+        if (getPlayerCustomDataStore().containsKey(user.getUuid())) {
+            return getPlayerCustomDataStore().get(user.getUuid());
+        }
+        final Map<Identifier, Data> data = Maps.newHashMap();
+        getPlayerCustomDataStore().put(user.getUuid(), data);
+        return data;
+    }
 
     /**
-     * Returns the plugin {@link Locales}
+     * Initialize a faucet of the plugin.
      *
-     * @return the {@link Locales}
+     * @param name   the name of the faucet
+     * @param runner a runnable for initializing the faucet
      */
-    @NotNull
-    Locales getLocales();
+    default void initialize(@NotNull String name, @NotNull ThrowingConsumer<HuskSync> runner) {
+        log(Level.INFO, "Initializing " + name + "...");
+        try {
+            runner.accept(this);
+        } catch (Throwable e) {
+            throw new FailedToLoadException("Failed to initialize " + name, e);
+        }
+        log(Level.INFO, "Successfully initialized " + name);
+    }
 
     /**
-     * Returns the plugin {@link Logger}
+     * Returns if a dependency is loaded
      *
-     * @return the {@link Logger}
+     * @param name the name of the dependency
+     * @return {@code true} if the dependency is loaded, {@code false} otherwise
+     */
+    boolean isDependencyLoaded(@NotNull String name);
+
+    /**
+     * Get a resource as an {@link InputStream} from the plugin jar
+     *
+     * @param name the path to the resource
+     * @return the {@link InputStream} of the resource
+     */
+    InputStream getResource(@NotNull String name);
+
+    /**
+     * Log a message to the console
+     *
+     * @param level     the level of the message
+     * @param message   the message to log
+     * @param throwable a throwable to log
+     */
+    void log(@NotNull Level level, @NotNull String message, @NotNull Throwable... throwable);
+
+    /**
+     * Send a debug message to the console, if debug logging is enabled
+     *
+     * @param message   the message to log
+     * @param throwable a throwable to log
+     */
+    default void debug(@NotNull String message, @NotNull Throwable... throwable) {
+        if (getSettings().isDebugLogging()) {
+            log(Level.INFO, getDebugString(message), throwable);
+        }
+    }
+
+    // Get the debug log message format
+    @NotNull
+    private String getDebugString(@NotNull String message) {
+        return String.format("[DEBUG] [%s] %s", new SimpleDateFormat("mm:ss.SSS").format(new Date()), message);
+    }
+
+    /**
+     * Get the {@link AudienceProvider} instance
+     *
+     * @return the {@link AudienceProvider} instance
+     * @since 1.0
      */
     @NotNull
-    Logger getLoggingAdapter();
+    AudienceProvider getAudiences();
+
+    /**
+     * Get the {@link Audience} instance for the given {@link OnlineUser}
+     *
+     * @param user the {@link OnlineUser} to get the {@link Audience} for
+     * @return the {@link Audience} instance
+     */
+    @NotNull
+    default Audience getAudience(@NotNull UUID user) {
+        return getAudiences().player(user);
+    }
+
+    /**
+     * Get the {@link ConsoleUser} instance
+     *
+     * @return the {@link ConsoleUser} instance
+     * @since 1.0
+     */
+    @NotNull
+    default ConsoleUser getConsole() {
+        return new ConsoleUser(getAudiences());
+    }
 
     /**
      * Returns the plugin version
@@ -131,10 +250,113 @@ public interface HuskSync {
     Version getMinecraftVersion();
 
     /**
-     * Reloads the {@link Settings} and {@link Locales} from their respective config files
+     * Returns the platform type
      *
-     * @return a {@link CompletableFuture} that will be completed when the plugin reload is complete and if it was successful
+     * @return the platform type
      */
-    CompletableFuture<Boolean> reload();
+    @NotNull
+    String getPlatformType();
+
+    /**
+     * Returns the server software version
+     *
+     * @return the server software version string
+     */
+    @NotNull
+    String getServerVersion();
+
+    /**
+     * Returns the legacy data converter if it exists
+     *
+     * @return the {@link LegacyConverter}
+     */
+    Optional<LegacyConverter> getLegacyConverter();
+
+    @NotNull
+    default UpdateChecker getUpdateChecker() {
+        return UpdateChecker.builder()
+                .currentVersion(getPluginVersion())
+                .endpoint(UpdateChecker.Endpoint.SPIGOT)
+                .resource(Integer.toString(SPIGOT_RESOURCE_ID))
+                .build();
+    }
+
+    default void checkForUpdates() {
+        if (getSettings().isCheckForUpdates()) {
+            getUpdateChecker().check().thenAccept(checked -> {
+                if (!checked.isUpToDate()) {
+                    log(Level.WARNING, String.format(
+                            "A new version of HuskSync is available: v%s (running v%s)",
+                            checked.getLatestVersion(), getPluginVersion())
+                    );
+                }
+            });
+        }
+    }
+
+    @NotNull
+    LockedHandler getLockedHandler();
+
+    /**
+     * Get the set of UUIDs of "locked players", for which events will be canceled.
+     * </p>
+     * Players are locked while their items are being set (on join) or saved (on quit)
+     */
+    @NotNull
+    Set<UUID> getLockedPlayers();
+
+    /**
+     * Get the set of UUIDs of players who are currently marked as disconnecting or disconnected
+     */
+    @NotNull
+    Set<UUID> getDisconnectingPlayers();
+
+    default boolean isLocked(@NotNull UUID uuid) {
+        return getLockedPlayers().contains(uuid);
+    }
+
+    default void lockPlayer(@NotNull UUID uuid) {
+        getLockedPlayers().add(uuid);
+    }
+
+    default void unlockPlayer(@NotNull UUID uuid) {
+        getLockedPlayers().remove(uuid);
+    }
+
+    @NotNull
+    Gson getGson();
+
+    boolean isDisabling();
+
+    @NotNull
+    default Gson createGson() {
+        return Converters.registerOffsetDateTime(new GsonBuilder()).create();
+    }
+
+    /**
+     * An exception indicating the plugin has been accessed before it has been registered.
+     */
+    final class FailedToLoadException extends IllegalStateException {
+
+        private static final String FORMAT = """
+                HuskSync has failed to load! The plugin will not be enabled and no data will be synchronized.
+                Please make sure the plugin has been setup correctly (https://william278.net/docs/husksync/setup):
+                
+                1) Make sure you've entered your MySQL, MariaDB or MongoDB database details correctly in config.yml
+                2) Make sure your Redis server details are also correct in config.yml
+                3) Make sure your config is up-to-date (https://william278.net/docs/husksync/config-file)
+                4) Check the error below for more details
+                
+                Caused by: %s""";
+
+        public FailedToLoadException(@NotNull String message) {
+            super(String.format(FORMAT, message));
+        }
+
+        public FailedToLoadException(@NotNull String message, @NotNull Throwable cause) {
+            super(String.format(FORMAT, message), cause);
+        }
+
+    }
 
 }

common/src/main/java/net/william278/husksync/HuskSyncInitializationException.java

@@ -1,12 +0,0 @@
-package net.william278.husksync;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Indicates an exception occurred while initialising the HuskSync plugin
- */
-public class HuskSyncInitializationException extends RuntimeException {
-    public HuskSyncInitializationException(@NotNull String message) {
-        super(message);
-    }
-}

common/src/main/java/net/william278/husksync/adapter/Adaptable.java

@@ -0,0 +1,24 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.adapter;
+
+
+public interface Adaptable {
+}

common/src/main/java/net/william278/husksync/adapter/DataAdapter.java

@@ -0,0 +1,108 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.adapter;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.nio.charset.StandardCharsets;
+
+/**
+ * An adapter that adapts data to and from a portable byte array.
+ */
+public interface DataAdapter {
+
+    /**
+     * Converts an {@link Adaptable} to a string.
+     *
+     * @param data The {@link Adaptable} to adapt
+     * @param <A>  The type of the {@link Adaptable}
+     * @return The string
+     * @throws AdaptionException If an error occurred during adaptation.
+     */
+    @NotNull
+    default <A extends Adaptable> String toString(@NotNull A data) throws AdaptionException {
+        return new String(this.toBytes(data), StandardCharsets.UTF_8);
+    }
+
+    /**
+     * Converts an {@link Adaptable} to a byte array.
+     *
+     * @param data The {@link Adaptable} to adapt
+     * @param <A>  The type of the {@link Adaptable}
+     * @return The byte array
+     * @throws AdaptionException If an error occurred during adaptation.
+     */
+    <A extends Adaptable> byte[] toBytes(@NotNull A data) throws AdaptionException;
+
+    /**
+     * Converts a JSON string to an {@link Adaptable}.
+     *
+     * @param data The JSON string to adapt.
+     * @param type The class type of the {@link Adaptable} to adapt to.
+     * @param <A>  The type of the {@link Adaptable}
+     * @return The {@link Adaptable}
+     * @throws AdaptionException If an error occurred during adaptation.
+     */
+    @NotNull
+    <A extends Adaptable> A fromJson(@NotNull String data, @NotNull Class<A> type) throws AdaptionException;
+
+    /**
+     * Converts an {@link Adaptable} to a JSON string.
+     *
+     * @param data The {@link Adaptable} to adapt
+     * @param <A>  The type of the {@link Adaptable}
+     * @return The JSON string
+     * @throws AdaptionException If an error occurred during adaptation.
+     */
+    @NotNull
+    <A extends Adaptable> String toJson(@NotNull A data) throws AdaptionException;
+
+    /**
+     * Converts a byte array to an {@link Adaptable}.
+     *
+     * @param data The byte array to adapt.
+     * @param type The class type of the {@link Adaptable} to adapt to.
+     * @param <A>  The type of the {@link Adaptable}
+     * @return The {@link Adaptable}
+     * @throws AdaptionException If an error occurred during adaptation.
+     */
+    <A extends Adaptable> A fromBytes(@NotNull byte[] data, @NotNull Class<A> type) throws AdaptionException;
+
+    /**
+     * Converts a byte array to a string, including decompression if required.
+     *
+     * @param bytes The byte array to convert
+     * @return the string form of the bytes
+     */
+    @NotNull
+    String bytesToString(byte[] bytes);
+
+    final class AdaptionException extends IllegalStateException {
+        static final String FORMAT = "An exception occurred when adapting serialized/deserialized data: %s";
+
+        public AdaptionException(@NotNull String message, @NotNull Throwable cause) {
+            super(String.format(FORMAT, message), cause);
+        }
+
+        public AdaptionException(@NotNull String message) {
+            super(String.format(FORMAT, message));
+        }
+    }
+}

common/src/main/java/net/william278/husksync/adapter/GsonAdapter.java

@@ -0,0 +1,72 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.adapter;
+
+import net.william278.husksync.HuskSync;
+import org.jetbrains.annotations.NotNull;
+
+import java.nio.charset.StandardCharsets;
+
+public class GsonAdapter implements DataAdapter {
+
+    private final HuskSync plugin;
+
+    public GsonAdapter(@NotNull HuskSync plugin) {
+        this.plugin = plugin;
+    }
+
+    @Override
+    public <A extends Adaptable> byte[] toBytes(@NotNull A data) throws AdaptionException {
+        return this.toJson(data).getBytes(StandardCharsets.UTF_8);
+    }
+
+    @NotNull
+    @Override
+    public <A extends Adaptable> String toJson(@NotNull A data) throws AdaptionException {
+        try {
+            return plugin.getGson().toJson(data);
+        } catch (Throwable e) {
+            throw new AdaptionException("Failed to adapt data to JSON via Gson", e);
+        }
+    }
+
+    @Override
+    @NotNull
+    public <A extends Adaptable> A fromBytes(byte[] data, @NotNull Class<A> type) throws AdaptionException {
+        return this.fromJson(new String(data, StandardCharsets.UTF_8), type);
+    }
+
+    @NotNull
+    @Override
+    public String bytesToString(byte[] bytes) {
+        return new String(bytes, StandardCharsets.UTF_8);
+    }
+
+    @Override
+    @NotNull
+    public <A extends Adaptable> A fromJson(@NotNull String data, @NotNull Class<A> type) throws AdaptionException {
+        try {
+            return plugin.getGson().fromJson(data, type);
+        } catch (Throwable e) {
+            throw new AdaptionException("Failed to adapt data from JSON via Gson", e);
+        }
+    }
+
+}

common/src/main/java/net/william278/husksync/adapter/SnappyGsonAdapter.java

@@ -0,0 +1,67 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.adapter;
+
+import net.william278.husksync.HuskSync;
+import org.jetbrains.annotations.NotNull;
+import org.xerial.snappy.Snappy;
+
+import java.io.IOException;
+
+public class SnappyGsonAdapter extends GsonAdapter {
+
+    public SnappyGsonAdapter(@NotNull HuskSync plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public <A extends Adaptable> byte[] toBytes(@NotNull A data) throws AdaptionException {
+        try {
+            return Snappy.compress(super.toBytes(data));
+        } catch (IOException e) {
+            throw new AdaptionException("Failed to compress data through Snappy", e);
+        }
+    }
+
+    @NotNull
+    @Override
+    public <A extends Adaptable> A fromBytes(byte[] data, @NotNull Class<A> type) throws AdaptionException {
+        try {
+            return super.fromBytes(decompressBytes(data), type);
+        } catch (IOException e) {
+            throw new AdaptionException("Failed to decompress data through Snappy", e);
+        }
+    }
+
+    @Override
+    @NotNull
+    public String bytesToString(byte[] bytes) {
+        try {
+            return super.bytesToString(decompressBytes(bytes));
+        } catch (IOException e) {
+            throw new AdaptionException("Failed to decompress data through Snappy", e);
+        }
+    }
+
+    private byte[] decompressBytes(byte[] bytes) throws IOException {
+        return Snappy.uncompress(bytes);
+    }
+
+}

common/src/main/java/net/william278/husksync/api/BaseHuskSyncAPI.java

@@ -1,137 +0,0 @@
-package net.william278.husksync.api;
-
-import net.william278.husksync.HuskSync;
-import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.UserData;
-import net.william278.husksync.data.UserDataSnapshot;
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.player.User;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.List;
-import java.util.Optional;
-import java.util.UUID;
-import java.util.concurrent.CompletableFuture;
-
-/**
- * The base implementation of the HuskSync API, containing cross-platform API calls.
- * </p>
- * This class should not be used directly, but rather through platform-specific extending API classes.
- */
-@SuppressWarnings("unused")
-public abstract class BaseHuskSyncAPI {
-
-    /**
-     * <b>(Internal use only)</b> - Instance of the implementing plugin.
-     */
-    protected final HuskSync plugin;
-
-    protected BaseHuskSyncAPI(@NotNull HuskSync plugin) {
-        this.plugin = plugin;
-    }
-
-    /**
-     * Returns a {@link User} by the given player's account {@link UUID}, if they exist.
-     *
-     * @param uuid the unique id of the player to get the {@link User} instance for
-     * @return future returning the {@link User} instance for the given player's unique id if they exist, otherwise an empty {@link Optional}
-     * @apiNote The player does not have to be online
-     * @since 2.0
-     */
-    public final CompletableFuture<Optional<User>> getUser(@NotNull UUID uuid) {
-        return plugin.getDatabase().getUser(uuid);
-    }
-
-    /**
-     * Returns a {@link User} by the given player's username (case-insensitive), if they exist.
-     *
-     * @param username the username of the {@link User} instance for
-     * @return future returning the {@link User} instance for the given player's username if they exist,
-     * otherwise an empty {@link Optional}
-     * @apiNote The player does not have to be online, though their username has to be the username
-     * they had when they last joined the server.
-     * @since 2.0
-     */
-    public final CompletableFuture<Optional<User>> getUser(@NotNull String username) {
-        return plugin.getDatabase().getUserByName(username);
-    }
-
-    /**
-     * Returns a {@link User}'s current {@link UserData}
-     *
-     * @param user the {@link User} to get the {@link UserData} for
-     * @return future returning the {@link UserData} for the given {@link User} if they exist, otherwise an empty {@link Optional}
-     * @apiNote If the user is not online on the implementing bukkit server,
-     * the {@link UserData} returned will be their last database-saved UserData.
-     * </p>
-     * Because of this, if the user is online on another server on the network,
-     * then the {@link UserData} returned by this method will <i>not necessarily reflective of
-     * their current state</i>
-     * @since 2.0
-     */
-    public final CompletableFuture<Optional<UserData>> getUserData(@NotNull User user) {
-        return CompletableFuture.supplyAsync(() -> {
-            if (user instanceof OnlineUser) {
-                return ((OnlineUser) user).getUserData(plugin.getLoggingAdapter()).join();
-            } else {
-                return plugin.getDatabase().getCurrentUserData(user).join().map(UserDataSnapshot::userData);
-            }
-        });
-    }
-
-    /**
-     * Sets the {@link UserData} to the database for the given {@link User}.
-     * </p>
-     * If the user is online and on the same cluster, their data will be updated in game.
-     *
-     * @param user     the {@link User} to set the {@link UserData} for
-     * @param userData the {@link UserData} to set for the given {@link User}
-     * @return future returning void when complete
-     * @since 2.0
-     */
-    public final CompletableFuture<Void> setUserData(@NotNull User user, @NotNull UserData userData) {
-        return CompletableFuture.runAsync(() ->
-                plugin.getDatabase().setUserData(user, userData, DataSaveCause.API)
-                        .thenRun(() -> plugin.getRedisManager().sendUserDataUpdate(user, userData).join()));
-    }
-
-    /**
-     * Saves the {@link UserData} of an {@link OnlineUser} to the database
-     *
-     * @param user the {@link OnlineUser} to save the {@link UserData} of
-     * @return future returning void when complete
-     * @since 2.0
-     */
-    public final CompletableFuture<Void> saveUserData(@NotNull OnlineUser user) {
-        return CompletableFuture.runAsync(() -> user.getUserData(plugin.getLoggingAdapter()).thenAccept(optionalUserData -> optionalUserData.ifPresent(
-                userData -> plugin.getDatabase().setUserData(user, userData, DataSaveCause.API).join())));
-    }
-
-    /**
-     * Returns the saved {@link UserDataSnapshot} records for the given {@link User}
-     *
-     * @param user the {@link User} to get the {@link UserDataSnapshot} for
-     * @return future returning a list {@link UserDataSnapshot} for the given {@link User} if they exist,
-     * otherwise an empty {@link Optional}
-     * @apiNote The length of the list of VersionedUserData will correspond to the configured
-     * {@code max_user_data_records} config option
-     * @since 2.0
-     */
-    public final CompletableFuture<List<UserDataSnapshot>> getSavedUserData(@NotNull User user) {
-        return CompletableFuture.supplyAsync(() -> plugin.getDatabase().getUserData(user).join());
-    }
-
-    /**
-     * Returns the JSON string representation of the given {@link UserData}
-     *
-     * @param userData    the {@link UserData} to get the JSON string representation of
-     * @param prettyPrint whether to pretty print the JSON string
-     * @return the JSON string representation of the given {@link UserData}
-     * @since 2.0
-     */
-    @NotNull
-    public final String getUserDataJson(@NotNull UserData userData, boolean prettyPrint) {
-        return plugin.getDataAdapter().toJson(userData, prettyPrint);
-    }
-
-}

common/src/main/java/net/william278/husksync/api/HuskSyncAPI.java

@@ -0,0 +1,543 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.api;
+
+import net.william278.desertwell.util.ThrowingConsumer;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.adapter.Adaptable;
+import net.william278.husksync.data.Data;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.data.Identifier;
+import net.william278.husksync.data.Serializer;
+import net.william278.husksync.sync.DataSyncer;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.BiConsumer;
+
+/**
+ * The common implementation of the HuskSync API, containing cross-platform API calls.
+ * </p>
+ * Retrieve an instance of the API class via {@link #getInstance()}.
+ *
+ * @since 2.0
+ */
+@SuppressWarnings("unused")
+public class HuskSyncAPI {
+
+    // Instance of the plugin
+    protected static HuskSyncAPI instance;
+
+    /**
+     * <b>(Internal use only)</b> - Instance of the implementing plugin.
+     */
+    protected final HuskSync plugin;
+
+    /**
+     * <b>(Internal use only)</b> - Constructor, instantiating the base API class.
+     */
+    @ApiStatus.Internal
+    protected HuskSyncAPI(@NotNull HuskSync plugin) {
+        this.plugin = plugin;
+    }
+
+    /**
+     * Entrypoint to the HuskSync API on the common platform - returns an instance of the API
+     *
+     * @return instance of the HuskSync API
+     * @since 3.3
+     */
+    @NotNull
+    public static HuskSyncAPI getInstance() {
+        if (instance == null) {
+            throw new NotRegisteredException();
+        }
+        return instance;
+    }
+
+    /**
+     * <b>(Internal use only)</b> - Unregister the API for this platform.
+     */
+    @ApiStatus.Internal
+    public static void unregister() {
+        instance = null;
+    }
+
+    /**
+     * Get a {@link User} by their UUID
+     *
+     * @param uuid The UUID of the user to get
+     * @return A future containing the user, or an empty optional if the user doesn't exist
+     * @since 3.0
+     */
+    @NotNull
+    public CompletableFuture<Optional<User>> getUser(@NotNull UUID uuid) {
+        return plugin.supplyAsync(() -> plugin.getDatabase().getUser(uuid));
+    }
+
+    /**
+     * Get an {@link OnlineUser} by their UUID
+     *
+     * @param uuid the UUID of the user to get
+     * @return The {@link OnlineUser} wrapped in an optional, if they are online on <i>this</i> server.
+     * @since 3.7.2
+     */
+    @NotNull
+    public Optional<OnlineUser> getOnlineUser(@NotNull UUID uuid) {
+        return plugin.getOnlineUser(uuid);
+    }
+
+    /**
+     * Get a {@link User} by their username
+     *
+     * @param username The username of the user to get
+     * @return A future containing the user, or an empty optional if the user doesn't exist
+     * @since 3.0
+     */
+    @NotNull
+    public CompletableFuture<Optional<User>> getUser(@NotNull String username) {
+        return plugin.supplyAsync(() -> plugin.getDatabase().getUserByName(username));
+    }
+
+    /**
+     * Create a new data snapshot of an {@link OnlineUser}'s data.
+     *
+     * @param user The user to create the snapshot of
+     * @return The snapshot of the user's data
+     * @since 3.0
+     */
+    @NotNull
+    public DataSnapshot.Packed createSnapshot(@NotNull OnlineUser user) {
+        return snapshotBuilder().saveCause(DataSnapshot.SaveCause.API).buildAndPack();
+    }
+
+    /**
+     * Get a {@link User}'s current data, as a {@link DataSnapshot.Unpacked}
+     * <p>
+     * If the user is online, this will create a new snapshot of their data with the {@code API} data save cause.
+     * </p>
+     * If the user is offline, this will return the latest snapshot of their data if that exists
+     * (an empty optional will be returned otherwise).
+     *
+     * @param user The user to get the data of
+     * @return A future containing the user's current data, or an empty optional if the user has no data
+     * @since 3.0
+     */
+    public CompletableFuture<Optional<DataSnapshot.Unpacked>> getCurrentData(@NotNull User user) {
+        return plugin.getRedisManager()
+                .getOnlineUserData(UUID.randomUUID(), user, DataSnapshot.SaveCause.API)
+                .thenApply(data -> data.or(() -> plugin.getDatabase().getLatestSnapshot(user)))
+                .thenApply(data -> data.map(snapshot -> snapshot.unpack(plugin)));
+    }
+
+    /**
+     * Set a user's current data.
+     * <p>
+     * This will update the user's data in the database (creating a new snapshot) and send a data update,
+     * updating the user if they are online.
+     *
+     * @param user The user to set the data of
+     * @param data The data to set
+     * @since 3.0
+     */
+    public void setCurrentData(@NotNull User user, @NotNull DataSnapshot data) {
+        plugin.runAsync(() -> {
+            final DataSnapshot.Packed packed = data instanceof DataSnapshot.Unpacked unpacked
+                    ? unpacked.pack(plugin) : (DataSnapshot.Packed) data;
+            addSnapshot(user, packed);
+            plugin.getRedisManager().sendUserDataUpdate(user, packed);
+        });
+    }
+
+    /**
+     * Edit a user's current data.
+     * <p>
+     * This will update the user's data in the database (creating a new snapshot) and send a data update,
+     * updating the user if they are online.
+     *
+     * @param user   The user to edit the data of
+     * @param editor The editor function
+     * @since 3.0
+     */
+    public void editCurrentData(@NotNull User user, @NotNull ThrowingConsumer<DataSnapshot.Unpacked> editor) {
+        getCurrentData(user).thenAccept(optional -> optional.ifPresent(data -> {
+            editor.accept(data);
+            data.setId(UUID.randomUUID());
+            setCurrentData(user, data);
+        }));
+    }
+
+    /**
+     * Get a list of all saved data snapshots for a user
+     *
+     * @param user The user to get the data snapshots of
+     * @return The user's data snapshots
+     * @since 3.0
+     */
+    public CompletableFuture<List<DataSnapshot.Unpacked>> getSnapshots(@NotNull User user) {
+        return plugin.supplyAsync(
+                () -> plugin.getDatabase().getAllSnapshots(user).stream()
+                        .map(snapshot -> snapshot.unpack(plugin))
+                        .toList()
+        );
+    }
+
+    /**
+     * Get a specific data snapshot for a user
+     *
+     * @param user      The user to get the data snapshot of
+     * @param versionId The version ID of the snapshot to get
+     * @return The user's data snapshot, or an empty optional if the user has no data
+     * @see #getSnapshots(User)
+     * @since 3.0
+     */
+    public CompletableFuture<List<DataSnapshot.Unpacked>> getSnapshot(@NotNull User user, @NotNull UUID versionId) {
+        return plugin.supplyAsync(
+                () -> plugin.getDatabase().getSnapshot(user, versionId).stream()
+                        .map(snapshot -> snapshot.unpack(plugin))
+                        .toList()
+        );
+    }
+
+    /**
+     * Edit a data snapshot for a user
+     *
+     * @param user      The user to edit the snapshot of
+     * @param versionId The version ID of the snapshot to edit
+     * @param editor    The editor function
+     * @since 3.0
+     */
+    public void editSnapshot(@NotNull User user, @NotNull UUID versionId,
+                             @NotNull ThrowingConsumer<DataSnapshot.Unpacked> editor) {
+        plugin.runAsync(() -> plugin.getDatabase().getSnapshot(user, versionId).ifPresent(snapshot -> {
+            final DataSnapshot.Unpacked unpacked = snapshot.unpack(plugin);
+            editor.accept(unpacked);
+            plugin.getDatabase().updateSnapshot(user, unpacked.pack(plugin));
+        }));
+    }
+
+    /**
+     * Get the latest data snapshot for a user that has been saved in the database.
+     * <p>
+     * Not to be confused with {@link #getCurrentData(User)}, which will return the current data of a user
+     * if they are online (this method will only return their latest <i>saved</i> snapshot).
+     * </p>
+     *
+     * @param user The user to get the latest data snapshot of
+     * @return The user's latest data snapshot, or an empty optional if the user has no data
+     * @since 3.0
+     */
+    public CompletableFuture<Optional<DataSnapshot.Unpacked>> getLatestSnapshot(@NotNull User user) {
+        return plugin.supplyAsync(
+                () -> plugin.getDatabase().getLatestSnapshot(user).map(snapshot -> snapshot.unpack(plugin))
+        );
+    }
+
+    /**
+     * Edit the latest data snapshot for a user
+     *
+     * @param user   The user to edit the latest snapshot of
+     * @param editor The editor function
+     * @since 3.0
+     */
+    public void editLatestSnapshot(@NotNull User user, @NotNull ThrowingConsumer<DataSnapshot.Unpacked> editor) {
+        plugin.runAsync(() -> plugin.getDatabase().getLatestSnapshot(user).ifPresent(snapshot -> {
+            final DataSnapshot.Unpacked unpacked = snapshot.unpack(plugin);
+            editor.accept(unpacked);
+            plugin.getDatabase().updateSnapshot(user, unpacked.pack(plugin));
+        }));
+    }
+
+    /**
+     * Adds a data snapshot to the database
+     *
+     * @param user     The user to save the data for
+     * @param snapshot The snapshot to save
+     * @param callback A callback to run after the data has been saved (if the DataSaveEvent was not canceled)
+     * @implNote Note that the {@link net.william278.husksync.event.DataSaveEvent} will be fired unless the
+     * {@link DataSnapshot.SaveCause#fireDataSaveEvent()} is {@code false}
+     * @since 3.3.2
+     */
+    public void addSnapshot(@NotNull User user, @NotNull DataSnapshot snapshot,
+                            @Nullable BiConsumer<User, DataSnapshot.Packed> callback) {
+        plugin.runAsync(() -> plugin.getDataSyncer().saveData(
+                user,
+                snapshot instanceof DataSnapshot.Unpacked unpacked
+                        ? unpacked.pack(plugin) : (DataSnapshot.Packed) snapshot,
+                callback
+        ));
+    }
+
+    /**
+     * Adds a data snapshot to the database
+     *
+     * @param user     The user to save the data for
+     * @param snapshot The snapshot to save
+     * @implNote Note that the {@link net.william278.husksync.event.DataSaveEvent} will be fired unless the
+     * {@link DataSnapshot.SaveCause#fireDataSaveEvent()} is {@code false}
+     * @since 3.0
+     */
+    public void addSnapshot(@NotNull User user, @NotNull DataSnapshot snapshot) {
+        this.addSnapshot(user, snapshot, null);
+    }
+
+    /**
+     * Update an <i>existing</i> data snapshot in the database.
+     * Not to be confused with {@link #addSnapshot(User, DataSnapshot)}, which will add a new snapshot if one
+     * snapshot doesn't exist.
+     *
+     * @param user     The user to update the snapshot of
+     * @param snapshot The snapshot to update
+     * @since 3.0
+     */
+    public void updateSnapshot(@NotNull User user, @NotNull DataSnapshot snapshot) {
+        plugin.runAsync(() -> plugin.getDatabase().updateSnapshot(
+                user, snapshot instanceof DataSnapshot.Unpacked unpacked
+                        ? unpacked.pack(plugin) : (DataSnapshot.Packed) snapshot
+        ));
+    }
+
+    /**
+     * Pin a data snapshot, preventing it from being rotated
+     *
+     * @param user            The user to pin the snapshot of
+     * @param snapshotVersion The version ID of the snapshot to pin
+     * @since 3.0
+     */
+    public void pinSnapshot(@NotNull User user, @NotNull UUID snapshotVersion) {
+        plugin.runAsync(() -> plugin.getDatabase().pinSnapshot(user, snapshotVersion));
+    }
+
+    /**
+     * Unpin a data snapshot, allowing it to be rotated
+     *
+     * @param user            The user to unpin the snapshot of
+     * @param snapshotVersion The version ID of the snapshot to unpin
+     * @since 3.0
+     */
+    public void unpinSnapshot(@NotNull User user, @NotNull UUID snapshotVersion) {
+        plugin.runAsync(() -> plugin.getDatabase().unpinSnapshot(user, snapshotVersion));
+    }
+
+    /**
+     * Delete a data snapshot from the database
+     *
+     * @param user      The user to delete the snapshot of
+     * @param versionId The version ID of the snapshot to delete
+     * @return A future which will complete with true if the snapshot was deleted, or false if it wasn't
+     * (e.g., if the snapshot didn't exist)
+     * @since 3.0
+     */
+    public CompletableFuture<Boolean> deleteSnapshot(@NotNull User user, @NotNull UUID versionId) {
+        return plugin.supplyAsync(() -> plugin.getDatabase().deleteSnapshot(user, versionId));
+    }
+
+    /**
+     * Delete a data snapshot from the database
+     *
+     * @param user     The user to delete the snapshot of
+     * @param snapshot The snapshot to delete
+     * @return A future which will complete with true if the snapshot was deleted, or false if it wasn't
+     * (e.g., if the snapshot hasn't been saved to the database yet)
+     * @since 3.0
+     */
+    public CompletableFuture<Boolean> deleteSnapshot(@NotNull User user, @NotNull DataSnapshot snapshot) {
+        return deleteSnapshot(user, snapshot.getId());
+    }
+
+    /**
+     * Registers a new custom data type serializer.
+     * <p>
+     * This allows for custom {@link Data} types to be persisted in {@link DataSnapshot}s. To register
+     * a new data type, you must provide a {@link Serializer} for serializing and deserializing the data type
+     * and invoke this method.
+     * </p>
+     * You'll need to do this on every server you wish to sync data between. On servers where the registered
+     * data type is not present, the data will be ignored and snapshots created on that server will not
+     * contain the data.
+     *
+     * @param identifier The identifier of the data type to register.
+     *                   Create one using {@code Identifier.from(Key.of("your_plugin_name", "key"))}
+     * @param serializer An implementation of {@link Serializer} for serializing and deserializing the {@link Data}
+     * @param <T>        A type extending {@link Data}; this will represent the data being held.
+     */
+    public <T extends Data> void registerDataSerializer(@NotNull Identifier identifier,
+                                                        @NotNull Serializer<T> serializer) {
+        plugin.registerSerializer(identifier, serializer);
+    }
+
+    /**
+     * Get a registered data serializer by its identifier
+     *
+     * @param identifier The identifier of the data type to get the serializer for
+     * @return The serializer for the given identifier, or an empty optional if the serializer isn't registered
+     * @since 3.5.4
+     */
+    public Optional<Serializer<Data>> getDataSerializer(@NotNull Identifier identifier) {
+        return plugin.getSerializer(identifier);
+    }
+
+    /**
+     * Get a {@link DataSnapshot.Unpacked} from a {@link DataSnapshot.Packed}
+     *
+     * @param unpacked The unpacked snapshot
+     * @return The packed snapshot
+     * @since 3.0
+     */
+    @NotNull
+    public DataSnapshot.Packed packSnapshot(@NotNull DataSnapshot.Unpacked unpacked) {
+        return unpacked.pack(plugin);
+    }
+
+    /**
+     * Get a {@link DataSnapshot.Unpacked} from a {@link DataSnapshot.Packed}
+     *
+     * @param packed The packed snapshot
+     * @return The unpacked snapshot
+     * @since 3.0
+     */
+    @NotNull
+    public DataSnapshot.Unpacked unpackSnapshot(@NotNull DataSnapshot.Packed packed) {
+        return packed.unpack(plugin);
+    }
+
+    /**
+     * Unpack, edit, and repack a data snapshot.
+     * </p>
+     * This won't save the snapshot to the database; it'll just edit the data snapshot in place.
+     *
+     * @param packed The packed snapshot
+     * @param editor An editor function for editing the unpacked snapshot
+     * @return The edited packed snapshot
+     * @since 3.0
+     */
+    @NotNull
+    public DataSnapshot.Packed editPackedSnapshot(@NotNull DataSnapshot.Packed packed,
+                                                  @NotNull ThrowingConsumer<DataSnapshot.Unpacked> editor) {
+        final DataSnapshot.Unpacked unpacked = packed.unpack(plugin);
+        editor.accept(unpacked);
+        return unpacked.pack(plugin);
+    }
+
+    /**
+     * Get the estimated size of a {@link DataSnapshot} in bytes
+     *
+     * @param snapshot The snapshot to get the size of
+     * @return The size of the snapshot in bytes
+     * @since 3.0
+     */
+    public int getSnapshotFileSize(@NotNull DataSnapshot snapshot) {
+        return (snapshot instanceof DataSnapshot.Packed packed)
+                ? packed.getFileSize(plugin)
+                : ((DataSnapshot.Unpacked) snapshot).pack(plugin).getFileSize(plugin);
+    }
+
+    /**
+     * Get a builder for creating a new data snapshot
+     *
+     * @return The builder
+     * @since 3.0
+     */
+    @NotNull
+    public DataSnapshot.Builder snapshotBuilder() {
+        return DataSnapshot.builder(plugin).saveCause(DataSnapshot.SaveCause.API);
+    }
+
+    /**
+     * Deserialize a JSON string to an {@link Adaptable}
+     *
+     * @param serialized The serialized JSON string
+     * @param type       The type of the element
+     * @param <T>        The type of the element
+     * @return The deserialized element
+     * @throws Serializer.DeserializationException If the element could not be deserialized
+     * @since 3.0
+     */
+    @NotNull
+    public <T extends Adaptable> T deserializeData(@NotNull String serialized, Class<T> type)
+            throws Serializer.DeserializationException {
+        return plugin.getDataAdapter().fromJson(serialized, type);
+    }
+
+    /**
+     * Serialize an {@link Adaptable} to a JSON string
+     *
+     * @param element The element to serialize
+     * @param <T>     The type of the element
+     * @return The serialized JSON string
+     * @throws Serializer.SerializationException If the element could not be serialized
+     * @since 3.0
+     */
+    @NotNull
+    public <T extends Adaptable> String serializeData(@NotNull T element)
+            throws Serializer.SerializationException {
+        return plugin.getDataAdapter().toJson(element);
+    }
+
+    /**
+     * Set the {@link DataSyncer} to be used to sync data
+     *
+     * @param syncer The data syncer to use for synchronizing user data
+     * @since 3.1
+     */
+    public void setDataSyncer(@NotNull DataSyncer syncer) {
+        plugin.setDataSyncer(syncer);
+    }
+
+    /**
+     * <b>(Internal use only)</b> - Get the plugin instance
+     *
+     * @return The plugin instance
+     */
+    @ApiStatus.Internal
+    public HuskSync getPlugin() {
+        return plugin;
+    }
+
+    /**
+     * An exception indicating the plugin has been accessed before it has been registered.
+     */
+    static final class NotRegisteredException extends IllegalStateException {
+
+        private static final String REASONS = """
+                This may be because:
+                1) HuskSync has failed to enable successfully
+                2) Your plugin isn't set to load after HuskSync has
+                   (Check if it set as a (soft)depend in plugin.yml or to load: BEFORE in paper-plugin.yml?)
+                3) You are attempting to access HuskSync on plugin construction/before your plugin has enabled.""";
+
+        NotRegisteredException(@NotNull String reasons) {
+            super("Could not access the HuskSync API as it has not yet been registered. %s".formatted(reasons));
+        }
+
+        NotRegisteredException() {
+            this(REASONS);
+        }
+
+    }
+
+}

common/src/main/java/net/william278/husksync/command/CommandBase.java

@@ -1,58 +0,0 @@
-package net.william278.husksync.command;
-
-import net.william278.husksync.HuskSync;
-import net.william278.husksync.player.OnlineUser;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Represents an abstract cross-platform representation for a plugin command
- */
-public abstract class CommandBase {
-
-    /**
-     * The input string to match for this command
-     */
-    public final String command;
-
-    /**
-     * The permission node required to use this command
-     */
-    public final String permission;
-
-    /**
-     * Alias input strings for this command
-     */
-    public final String[] aliases;
-
-    /**
-     * Instance of the implementing plugin
-     */
-    public final HuskSync plugin;
-
-
-    public CommandBase(@NotNull String command, @NotNull Permission permission, @NotNull HuskSync implementor, String... aliases) {
-        this.command = command;
-        this.permission = permission.node;
-        this.plugin = implementor;
-        this.aliases = aliases;
-    }
-
-    /**
-     * Fires when the command is executed
-     *
-     * @param player {@link OnlineUser} executing the command
-     * @param args   Command arguments
-     */
-    public abstract void onExecute(@NotNull OnlineUser player, @NotNull String[] args);
-
-    /**
-     * Returns the localised description string of this command
-     *
-     * @return the command description
-     */
-    public String getDescription() {
-        return plugin.getLocales().getRawLocale(command + "_command_description")
-                .orElse("A HuskHomes command");
-    }
-
-}

common/src/main/java/net/william278/husksync/command/ConsoleExecutable.java

@@ -1,17 +0,0 @@
-package net.william278.husksync.command;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Interface providing console execution of commands
- */
-public interface ConsoleExecutable {
-
-    /**
-     * What to do when console executes a command
-     *
-     * @param args command argument strings
-     */
-    void onConsoleExecute(@NotNull String[] args);
-
-}

common/src/main/java/net/william278/husksync/command/EnderChestCommand.java

@@ -1,90 +1,101 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.command;
 
+import de.themoep.minedown.adventure.MineDown;
 import net.william278.husksync.HuskSync;
-import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.UserData;
-import net.william278.husksync.data.UserDataSnapshot;
-import net.william278.husksync.editor.ItemEditorMenu;
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.player.User;
+import net.william278.husksync.data.Data;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.redis.RedisManager;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
 import org.jetbrains.annotations.NotNull;
 
-import java.text.DateFormat;
+import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
 import java.util.List;
-import java.util.Locale;
-import java.util.UUID;
-import java.util.concurrent.CompletableFuture;
-import java.util.stream.Collectors;
+import java.util.Optional;
 
-public class EnderChestCommand extends CommandBase implements TabCompletable {
+public class EnderChestCommand extends ItemsCommand {
 
-    public EnderChestCommand(@NotNull HuskSync implementor) {
-        super("enderchest", Permission.COMMAND_ENDER_CHEST, implementor, "echest", "openechest");
+    public EnderChestCommand(@NotNull HuskSync plugin) {
+        super("enderchest", List.of("echest", "openechest"), DataSnapshot.SaveCause.ENDERCHEST_COMMAND, plugin);
     }
 
     @Override
-    public void onExecute(@NotNull OnlineUser player, @NotNull String[] args) {
-        if (args.length == 0 || args.length > 2) {
-            plugin.getLocales().getLocale("error_invalid_syntax", "/enderchest <player>")
-                    .ifPresent(player::sendMessage);
+    protected void showItems(@NotNull OnlineUser viewer, @NotNull DataSnapshot.Unpacked snapshot,
+                             @NotNull User user, boolean allowEdit) {
+        final Optional<Data.Items.EnderChest> optionalEnderChest = snapshot.getEnderChest();
+        if (optionalEnderChest.isEmpty()) {
+            plugin.getLocales().getLocale("error_no_data_to_display")
+                    .ifPresent(viewer::sendMessage);
             return;
         }
-        plugin.getDatabase().getUserByName(args[0].toLowerCase()).thenAccept(optionalUser ->
-                optionalUser.ifPresentOrElse(user -> {
-                    if (args.length == 2) {
-                        // View user data by specified UUID
-                        try {
-                            final UUID versionUuid = UUID.fromString(args[1]);
-                            plugin.getDatabase().getUserData(user, versionUuid).thenAccept(data -> data.ifPresentOrElse(
-                                    userData -> showEnderChestMenu(player, userData, user, false),
-                                    () -> plugin.getLocales().getLocale("error_invalid_version_uuid")
-                                            .ifPresent(player::sendMessage)));
-                        } catch (IllegalArgumentException e) {
-                            plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/enderchest <player> [version_uuid]").ifPresent(player::sendMessage);
-                        }
-                    } else {
-                        // View latest user data
-                        plugin.getDatabase().getCurrentUserData(user).thenAccept(optionalData -> optionalData.ifPresentOrElse(
-                                versionedUserData -> showEnderChestMenu(player, versionedUserData, user, true),
-                                () -> plugin.getLocales().getLocale("error_no_data_to_display")
-                                        .ifPresent(player::sendMessage)));
+
+        // Display opening message
+        plugin.getLocales().getLocale("ender_chest_viewer_opened", user.getName(),
+                        snapshot.getTimestamp().format(DateTimeFormatter
+                                .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)))
+                .ifPresent(viewer::sendMessage);
+
+        // Show GUI
+        final Data.Items.EnderChest enderChest = optionalEnderChest.get();
+        viewer.showGui(
+                enderChest,
+                plugin.getLocales().getLocale("ender_chest_viewer_menu_title", user.getName())
+                        .orElse(new MineDown(String.format("%s's Ender Chest", user.getName()))),
+                allowEdit,
+                enderChest.getSlotCount(),
+                (itemsOnClose) -> {
+                    if (allowEdit && !enderChest.equals(itemsOnClose)) {
+                        plugin.runAsync(() -> this.updateItems(viewer, itemsOnClose, user));
                     }
-                }, () -> plugin.getLocales().getLocale("error_invalid_player")
-                        .ifPresent(player::sendMessage)));
+                }
+        );
     }
 
-    private void showEnderChestMenu(@NotNull OnlineUser player, @NotNull UserDataSnapshot userDataSnapshot,
-                                    @NotNull User dataOwner, final boolean allowEdit) {
-        CompletableFuture.runAsync(() -> {
-            final UserData data = userDataSnapshot.userData();
-            final ItemEditorMenu menu = ItemEditorMenu.createEnderChestMenu(data.getEnderChestData(),
-                    dataOwner, player, plugin.getLocales(), allowEdit);
-            plugin.getLocales().getLocale("viewing_ender_chest_of", dataOwner.username,
-                            DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT, Locale.getDefault())
-                                    .format(userDataSnapshot.versionTimestamp()))
-                    .ifPresent(player::sendMessage);
-            plugin.getDataEditor().openItemEditorMenu(player, menu).thenAccept(enderChestDataOnClose -> {
-                if (!menu.canEdit) {
-                    return;
-                }
-                final UserData updatedUserData = new UserData(data.getStatusData(), data.getInventoryData(),
-                        enderChestDataOnClose, data.getPotionEffectsData(), data.getAdvancementData(),
-                        data.getStatisticsData(), data.getLocationData(),
-                        data.getPersistentDataContainerData(),
-                        plugin.getMinecraftVersion().toString());
-                plugin.getDatabase().setUserData(dataOwner, updatedUserData, DataSaveCause.ENDERCHEST_COMMAND).join();
-                plugin.getRedisManager().sendUserDataUpdate(dataOwner, updatedUserData).join();
-            });
+    // Creates a new snapshot with the updated enderChest
+    @SuppressWarnings("DuplicatedCode")
+    private void updateItems(@NotNull OnlineUser viewer, @NotNull Data.Items.Items items, @NotNull User holder) {
+        final Optional<DataSnapshot.Packed> latestData = plugin.getDatabase().getLatestSnapshot(holder);
+        if (latestData.isEmpty()) {
+            plugin.getLocales().getLocale("error_no_data_to_display")
+                    .ifPresent(viewer::sendMessage);
+            return;
+        }
+
+        // Create and pack the snapshot with the updated enderChest
+        final DataSnapshot.Packed snapshot = latestData.get().copy();
+        boolean pin = plugin.getSettings().getSynchronization().doAutoPin(saveCause);
+        snapshot.edit(plugin, (data) -> {
+            data.getEnderChest().ifPresent(enderChest -> enderChest.setContents(items));
+            data.setSaveCause(saveCause);
+            data.setPinned(pin);
         });
 
-    }
-
-    @Override
-    public List<String> onTabComplete(@NotNull String[] args) {
-        return plugin.getOnlineUsers().stream().map(user -> user.username)
-                .filter(argument -> argument.startsWith(args.length >= 1 ? args[0] : ""))
-                .sorted().collect(Collectors.toList());
+        // Save data
+        final RedisManager redis = plugin.getRedisManager();
+        plugin.getDataSyncer().saveData(holder, snapshot, (user, data) -> {
+            redis.getUserData(user).ifPresent(d -> redis.setUserData(user, snapshot));
+            redis.sendUserDataUpdate(user, data);
+        });
     }
 
 }

common/src/main/java/net/william278/husksync/command/HuskSyncCommand.java

@@ -1,141 +1,259 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.command;
 
-import de.themoep.minedown.MineDown;
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import de.themoep.minedown.adventure.MineDown;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.JoinConfiguration;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextColor;
+import net.kyori.adventure.text.format.TextDecoration;
+import net.william278.desertwell.about.AboutMenu;
+import net.william278.desertwell.util.UpdateChecker;
 import net.william278.husksync.HuskSync;
-import net.william278.husksync.config.Locales;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.database.Database;
 import net.william278.husksync.migrator.Migrator;
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.util.UpdateChecker;
+import net.william278.husksync.user.CommandUser;
+import net.william278.husksync.util.LegacyConverter;
+import net.william278.husksync.util.StatusLine;
+import net.william278.uniform.BaseCommand;
+import net.william278.uniform.CommandProvider;
+import net.william278.uniform.Permission;
+import net.william278.uniform.element.ArgumentElement;
 import org.jetbrains.annotations.NotNull;
 
+import java.time.OffsetDateTime;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Optional;
+import java.util.UUID;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
 
-public class HuskSyncCommand extends CommandBase implements TabCompletable, ConsoleExecutable {
+public class HuskSyncCommand extends PluginCommand {
 
-    private final String[] COMMAND_ARGUMENTS = {"update", "about", "reload", "migrate"};
+    private final UpdateChecker updateChecker;
+    private final AboutMenu aboutMenu;
 
-    public HuskSyncCommand(@NotNull HuskSync implementor) {
-        super("husksync", Permission.COMMAND_HUSKSYNC, implementor);
+    public HuskSyncCommand(@NotNull HuskSync plugin) {
+        super("husksync", List.of(), Permission.Default.TRUE, ExecutionScope.ALL, plugin);
+        this.updateChecker = plugin.getUpdateChecker();
+        this.aboutMenu = AboutMenu.builder()
+                .title(Component.text("HuskSync"))
+                .description(Component.text("A modern, cross-server player data synchronization system"))
+                .version(plugin.getPluginVersion())
+                .credits("Author",
+                        AboutMenu.Credit.of("William278").description("Click to visit website").url("https://william278.net"))
+                .credits("Contributors",
+                        AboutMenu.Credit.of("HarvelsX").description("Code"),
+                        AboutMenu.Credit.of("HookWoods").description("Code"),
+                        AboutMenu.Credit.of("Preva1l").description("Code"),
+                        AboutMenu.Credit.of("hanbings").description("Code (Fabric porting)"),
+                        AboutMenu.Credit.of("Stampede2011").description("Code (Fabric mixins)"),
+                        AboutMenu.Credit.of("VinerDream").description("Code"))
+                .credits("Translators",
+                        AboutMenu.Credit.of("Namiu").description("Japanese (ja-jp)"),
+                        AboutMenu.Credit.of("anchelthe").description("Spanish (es-es)"),
+                        AboutMenu.Credit.of("Melonzio").description("Spanish (es-es)"),
+                        AboutMenu.Credit.of("Ceddix").description("German (de-de)"),
+                        AboutMenu.Credit.of("Pukejoy_1").description("Bulgarian (bg-bg)"),
+                        AboutMenu.Credit.of("mateusneresrb").description("Brazilian Portuguese (pt-br)"),
+                        AboutMenu.Credit.of("小蔡").description("Traditional Chinese (zh-tw)"),
+                        AboutMenu.Credit.of("Ghost-chu").description("Simplified Chinese (zh-cn)"),
+                        AboutMenu.Credit.of("DJelly4K").description("Simplified Chinese (zh-cn)"),
+                        AboutMenu.Credit.of("Thourgard").description("Ukrainian (uk-ua)"),
+                        AboutMenu.Credit.of("xF3d3").description("Italian (it-it)"),
+                        AboutMenu.Credit.of("cada3141").description("Korean (ko-kr)"),
+                        AboutMenu.Credit.of("Wirayuda5620").description("Indonesian (id-id)"),
+                        AboutMenu.Credit.of("WinTone01").description("Turkish (tr-tr)"),
+                        AboutMenu.Credit.of("IbanEtchep").description("French (fr-fr)"))
+                .buttons(
+                        AboutMenu.Link.of("https://william278.net/docs/husksync").text("Documentation").icon("⛏"),
+                        AboutMenu.Link.of("https://github.com/WiIIiam278/HuskSync/issues").text("Issues").icon("❌").color(TextColor.color(0xff9f0f)),
+                        AboutMenu.Link.of("https://discord.gg/tVYhJfyDWG").text("Discord").icon("⭐").color(TextColor.color(0x6773f5)))
+                .build();
     }
 
     @Override
-    public void onExecute(@NotNull OnlineUser player, @NotNull String[] args) {
-        if (args.length < 1) {
-            displayPluginInformation(player);
-            return;
-        }
-        switch (args[0].toLowerCase()) {
-            case "update", "version" -> {
-                if (!player.hasPermission(Permission.COMMAND_HUSKSYNC_UPDATE.node)) {
-                    plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-                    return;
-                }
-                final UpdateChecker updateChecker = new UpdateChecker(plugin.getPluginVersion(), plugin.getLoggingAdapter());
-                updateChecker.fetchLatestVersion().thenAccept(latestVersion -> {
-                    if (updateChecker.isUpdateAvailable(latestVersion)) {
-                        player.sendMessage(new MineDown("[HuskSync](#00fb9a bold) [| A new update is available:](#00fb9a) [HuskSync " + latestVersion + "](#00fb9a bold)" +
-                                                        "[•](white) [Currently running:](#00fb9a) [Version " + updateChecker.getCurrentVersion() + "](gray)" +
-                                                        "[•](white) [Download links:](#00fb9a) [[⏩ Spigot]](gray open_url=https://www.spigotmc.org/resources/husksync.97144/updates) [•](#262626) [[⏩ Polymart]](gray open_url=https://polymart.org/resource/husksync.1634/updates) [•](#262626) [[⏩ Songoda]](gray open_url=https://songoda.com/marketplace/product/husksync-a-modern-cross-server-player-data-synchronization-system.758)"));
+    public void provide(@NotNull BaseCommand<?> command) {
+        command.setDefaultExecutor((ctx) -> about(command, ctx));
+        command.addSubCommand("about", (sub) -> sub.setDefaultExecutor((ctx) -> about(command, ctx)));
+        command.addSubCommand("status", needsOp("status"), status());
+        command.addSubCommand("dump", needsOp("dump"), dump());
+        command.addSubCommand("reload", needsOp("reload"), reload());
+        command.addSubCommand("update", needsOp("update"), update());
+        command.addSubCommand("forceupgrade", forceUpgrade());
+        command.addSubCommand("migrate", migrate());
+    }
+
+    private void about(@NotNull BaseCommand<?> c, @NotNull CommandContext<?> ctx) {
+        user(c, ctx).getAudience().sendMessage(aboutMenu.toComponent());
+    }
+
+    @NotNull
+    private CommandProvider status() {
+        return (sub) -> sub.setDefaultExecutor((ctx) -> {
+            final CommandUser user = user(sub, ctx);
+            plugin.getLocales().getLocale("system_status_header").ifPresent(user::sendMessage);
+            user.sendMessage(Component.join(
+                    JoinConfiguration.newlines(),
+                    Arrays.stream(StatusLine.values()).map(s -> s.get(plugin)).toList()
+            ));
+        });
+    }
+
+    @NotNull
+    private CommandProvider dump() {
+        return (sub) -> {
+            sub.setDefaultExecutor((ctx) -> {
+                final CommandUser user = user(sub, ctx);
+                plugin.getLocales().getLocale("system_dump_confirm").ifPresent(user::sendMessage);
+            });
+            sub.addSubCommand("confirm", (con) -> con.setDefaultExecutor((ctx) -> {
+                final CommandUser user = user(sub, ctx);
+                plugin.getLocales().getLocale("system_dump_started").ifPresent(user::sendMessage);
+                plugin.runAsync(() -> {
+                    final String url = plugin.createDump(user);
+                    plugin.getLocales().getLocale("system_dump_ready").ifPresent(user::sendMessage);
+                    user.sendMessage(Component.text(url).clickEvent(ClickEvent.openUrl(url))
+                            .decorate(TextDecoration.UNDERLINED).color(NamedTextColor.GRAY));
+                });
+            }));
+        };
+    }
+
+    @NotNull
+    private CommandProvider reload() {
+        return (sub) -> sub.setDefaultExecutor((ctx) -> {
+            final CommandUser user = user(sub, ctx);
+            try {
+                plugin.loadSettings();
+                plugin.loadLocales();
+                plugin.loadServer();
+                plugin.getLocales().getLocale("reload_complete").ifPresent(user::sendMessage);
+            } catch (Throwable e) {
+                user.sendMessage(new MineDown(
+                        "[Error:](#ff3300) [Failed to reload the plugin. Check console for errors.](#ff7e5e)"
+                ));
+                plugin.log(Level.SEVERE, "Failed to reload the plugin", e);
+            }
+        });
+    }
+
+    @NotNull
+    private CommandProvider update() {
+        return (sub) -> sub.setDefaultExecutor((ctx) -> updateChecker.check().thenAccept(checked -> {
+            final CommandUser user = user(sub, ctx);
+            if (checked.isUpToDate()) {
+                plugin.getLocales().getLocale("up_to_date", plugin.getPluginVersion().toString())
+                        .ifPresent(user::sendMessage);
+                return;
+            }
+            plugin.getLocales().getLocale("update_available", checked.getLatestVersion().toString(),
+                    plugin.getPluginVersion().toString()).ifPresent(user::sendMessage);
+        }));
+    }
+
+    @NotNull
+    private CommandProvider migrate() {
+        return (sub) -> {
+            sub.setCondition((ctx) -> sub.getUser(ctx).isConsole());
+            sub.setDefaultExecutor((ctx) -> {
+                plugin.log(Level.INFO, "Please choose a migrator, then run \"husksync migrate start <migrator>\"");
+                plugin.log(Level.INFO, String.format(
+                        "List of available migrators:\nMigrator ID / Migrator Name:\n%s",
+                        plugin.getAvailableMigrators().stream()
+                                .map(migrator -> String.format("%s - %s", migrator.getIdentifier(), migrator.getName()))
+                                .collect(Collectors.joining("\n"))
+                ));
+            });
+            sub.addSubCommand("help", (help) -> help.addSyntax((cmd) -> {
+                final Migrator migrator = cmd.getArgument("migrator", Migrator.class);
+                plugin.log(Level.INFO, migrator.getHelpMenu());
+            }, migrator()));
+            sub.addSubCommand("start", (start) -> start.addSyntax((cmd) -> {
+                final Migrator migrator = cmd.getArgument("migrator", Migrator.class);
+                migrator.start().thenAccept(succeeded -> {
+                    if (succeeded) {
+                        plugin.log(Level.INFO, "Migration completed successfully!");
                     } else {
-                        player.sendMessage(new MineDown("[HuskSync](#00fb9a bold) [| HuskSync is up-to-date, running version " + updateChecker.getCurrentVersion() + "](#00fb9a)"));
+                        plugin.log(Level.WARNING, "Migration failed!");
                     }
                 });
-            }
-            case "info", "about" -> displayPluginInformation(player);
-            case "reload" -> {
-                if (!player.hasPermission(Permission.COMMAND_HUSKSYNC_RELOAD.node)) {
-                    plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-                    return;
-                }
-                plugin.reload();
-                plugin.getLocales().getLocale("reload_complete").ifPresent(player::sendMessage);
-            }
-            case "migrate" ->
-                    plugin.getLocales().getLocale("error_console_command_only").ifPresent(player::sendMessage);
-            default -> plugin.getLocales().getLocale("error_invalid_syntax",
-                            "/husksync <update/about/reload>")
-                    .ifPresent(player::sendMessage);
-        }
+            }, migrator()));
+            sub.addSubCommand("set", (set) -> set.addSyntax((cmd) -> {
+                final Migrator migrator = cmd.getArgument("migrator", Migrator.class);
+                final String[] args = cmd.getArgument("args", String.class).split(" ");
+                migrator.handleConfigurationCommand(args);
+            }, migrator(), BaseCommand.greedyString("args")));
+        };
     }
 
-    @Override
-    public void onConsoleExecute(@NotNull String[] args) {
-        if (args.length < 1) {
-            plugin.getLoggingAdapter().log(Level.INFO, "Console usage: \"husksync <update/about/reload/migrate>\"");
-            return;
-        }
-        switch (args[0].toLowerCase()) {
-            case "update", "version" ->
-                    new UpdateChecker(plugin.getPluginVersion(), plugin.getLoggingAdapter()).logToConsole();
-            case "info", "about" ->
-                    plugin.getLoggingAdapter().log(Level.INFO, new MineDown(plugin.getLocales().stripMineDown(
-                            Locales.PLUGIN_INFORMATION.replace("%version%", plugin.getPluginVersion().toString()))));
-            case "reload" -> {
-                plugin.reload();
-                plugin.getLoggingAdapter().log(Level.INFO, "Reloaded config & message files.");
-            }
-            case "migrate" -> {
-                if (args.length < 2) {
-                    plugin.getLoggingAdapter().log(Level.INFO,
-                            "Please choose a migrator, then run \"husksync migrate <migrator>\"");
-                    logMigratorsList();
+    @NotNull
+    private CommandProvider forceUpgrade() {
+        return (sub) -> {
+            sub.setCondition((ctx) -> sub.getUser(ctx).isConsole());
+            sub.setDefaultExecutor((ctx) -> {
+                final LegacyConverter converter = plugin.getLegacyConverter().orElse(null);
+                if (converter == null) {
                     return;
                 }
-                final Optional<Migrator> selectedMigrator = plugin.getAvailableMigrators().stream().filter(availableMigrator ->
-                        availableMigrator.getIdentifier().equalsIgnoreCase(args[1])).findFirst();
-                selectedMigrator.ifPresentOrElse(migrator -> {
-                    if (args.length < 3) {
-                        plugin.getLoggingAdapter().log(Level.INFO, migrator.getHelpMenu());
-                        return;
-                    }
-                    switch (args[2]) {
-                        case "start" -> migrator.start().thenAccept(succeeded -> {
-                            if (succeeded) {
-                                plugin.getLoggingAdapter().log(Level.INFO, "Migration completed successfully!");
-                            } else {
-                                plugin.getLoggingAdapter().log(Level.WARNING, "Migration failed!");
-                            }
-                        });
-                        case "set" -> migrator.handleConfigurationCommand(Arrays.copyOfRange(args, 3, args.length));
-                        default -> plugin.getLoggingAdapter().log(Level.INFO,
-                                "Invalid syntax. Console usage: \"husksync migrate " + args[1] + " <start/set>");
-                    }
-                }, () -> {
-                    plugin.getLoggingAdapter().log(Level.INFO,
-                            "Please specify a valid migrator.\n" +
-                            "If a migrator is not available, please verify that you meet the prerequisites to use it.");
-                    logMigratorsList();
+
+                plugin.runAsync(() -> {
+                    final Database database = plugin.getDatabase();
+                    plugin.log(Level.INFO, "Beginning forced legacy data upgrade for all users...");
+                    database.getAllUsers().forEach(user -> database.getLatestSnapshot(user).ifPresent(snapshot -> {
+                        final DataSnapshot.Packed upgraded = converter.convert(
+                                snapshot.asBytes(plugin),
+                                UUID.randomUUID(),
+                                OffsetDateTime.now()
+                        );
+                        upgraded.setSaveCause(DataSnapshot.SaveCause.CONVERTED_FROM_V2);
+                        plugin.getDatabase().addSnapshot(user, upgraded);
+                        plugin.getRedisManager().clearUserData(user);
+                    }));
+                    plugin.log(Level.INFO, "Legacy data upgrade complete!");
                 });
+            });
+        };
+    }
+
+    @NotNull
+    private <S> ArgumentElement<S, Migrator> migrator() {
+        return new ArgumentElement<>("migrator", reader -> {
+            final String id = reader.readString();
+            final Migrator migrator = plugin.getAvailableMigrators().stream()
+                    .filter(m -> m.getIdentifier().equalsIgnoreCase(id)).findFirst().orElse(null);
+            if (migrator == null) {
+                throw CommandSyntaxException.BUILT_IN_EXCEPTIONS.dispatcherUnknownArgument().createWithContext(reader);
             }
-            default -> plugin.getLoggingAdapter().log(Level.INFO,
-                    "Invalid syntax. Console usage: \"husksync <update/about/reload/migrate>\"");
-        }
+            return migrator;
+        }, (context, builder) -> {
+            for (Migrator material : plugin.getAvailableMigrators()) {
+                builder.suggest(material.getIdentifier());
+            }
+            return builder.buildFuture();
+        });
     }
 
-    private void logMigratorsList() {
-        plugin.getLoggingAdapter().log(Level.INFO,
-                "List of available migrators:\nMigrator ID / Migrator Name:\n" +
-                plugin.getAvailableMigrators().stream()
-                        .map(migrator -> migrator.getIdentifier() + " - " + migrator.getName())
-                        .collect(Collectors.joining("\n")));
-    }
-
-    @Override
-    public List<String> onTabComplete(@NotNull String[] args) {
-        return Arrays.stream(COMMAND_ARGUMENTS)
-                .filter(argument -> argument.startsWith(args.length >= 1 ? args[0] : ""))
-                .sorted().collect(Collectors.toList());
-    }
-
-    private void displayPluginInformation(@NotNull OnlineUser player) {
-        if (!player.hasPermission(Permission.COMMAND_HUSKSYNC_INFO.node)) {
-            plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-            return;
-        }
-        player.sendMessage(new MineDown(Locales.PLUGIN_INFORMATION.replace("%version%", plugin.getPluginVersion().toString())));
-    }
 }

common/src/main/java/net/william278/husksync/command/InventoryCommand.java

@@ -1,88 +1,101 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.command;
 
+import de.themoep.minedown.adventure.MineDown;
 import net.william278.husksync.HuskSync;
-import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.data.UserData;
-import net.william278.husksync.data.UserDataSnapshot;
-import net.william278.husksync.editor.ItemEditorMenu;
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.player.User;
+import net.william278.husksync.data.Data;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.redis.RedisManager;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
 import org.jetbrains.annotations.NotNull;
 
-import java.text.DateFormat;
+import java.time.format.DateTimeFormatter;
+import java.time.format.FormatStyle;
 import java.util.List;
-import java.util.Locale;
-import java.util.UUID;
-import java.util.concurrent.CompletableFuture;
-import java.util.stream.Collectors;
+import java.util.Optional;
 
-public class InventoryCommand extends CommandBase implements TabCompletable {
+public class InventoryCommand extends ItemsCommand {
 
-    public InventoryCommand(@NotNull HuskSync implementor) {
-        super("inventory", Permission.COMMAND_INVENTORY, implementor, "invsee", "openinv");
+    public InventoryCommand(@NotNull HuskSync plugin) {
+        super("inventory", List.of("invsee", "openinv"), DataSnapshot.SaveCause.INVENTORY_COMMAND, plugin);
     }
 
     @Override
-    public void onExecute(@NotNull OnlineUser player, @NotNull String[] args) {
-        if (args.length == 0 || args.length > 2) {
-            plugin.getLocales().getLocale("error_invalid_syntax", "/inventory <player>")
-                    .ifPresent(player::sendMessage);
+    protected void showItems(@NotNull OnlineUser viewer, @NotNull DataSnapshot.Unpacked snapshot,
+                             @NotNull User user, boolean allowEdit) {
+        final Optional<Data.Items.Inventory> optionalInventory = snapshot.getInventory();
+        if (optionalInventory.isEmpty()) {
+            plugin.getLocales().getLocale("error_no_data_to_display")
+                    .ifPresent(viewer::sendMessage);
             return;
         }
-        plugin.getDatabase().getUserByName(args[0].toLowerCase()).thenAccept(optionalUser ->
-                optionalUser.ifPresentOrElse(user -> {
-                    if (args.length == 2) {
-                        // View user data by specified UUID
-                        try {
-                            final UUID versionUuid = UUID.fromString(args[1]);
-                            plugin.getDatabase().getUserData(user, versionUuid).thenAccept(data -> data.ifPresentOrElse(
-                                    userData -> showInventoryMenu(player, userData, user, false),
-                                    () -> plugin.getLocales().getLocale("error_invalid_version_uuid")
-                                            .ifPresent(player::sendMessage)));
-                        } catch (IllegalArgumentException e) {
-                            plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/inventory <player> [version_uuid]").ifPresent(player::sendMessage);
-                        }
-                    } else {
-                        // View latest user data
-                        plugin.getDatabase().getCurrentUserData(user).thenAccept(optionalData -> optionalData.ifPresentOrElse(
-                                versionedUserData -> showInventoryMenu(player, versionedUserData, user, true),
-                                () -> plugin.getLocales().getLocale("error_no_data_to_display")
-                                        .ifPresent(player::sendMessage)));
+
+        // Display opening message
+        plugin.getLocales().getLocale("inventory_viewer_opened", user.getName(),
+                        snapshot.getTimestamp().format(DateTimeFormatter
+                                .ofLocalizedDateTime(FormatStyle.MEDIUM, FormatStyle.SHORT)))
+                .ifPresent(viewer::sendMessage);
+
+        // Show GUI
+        final Data.Items.Inventory inventory = optionalInventory.get();
+        viewer.showGui(
+                inventory,
+                plugin.getLocales().getLocale("inventory_viewer_menu_title", user.getName())
+                        .orElse(new MineDown(String.format("%s's Inventory", user.getName()))),
+                allowEdit,
+                inventory.getSlotCount(),
+                (itemsOnClose) -> {
+                    if (allowEdit && !inventory.equals(itemsOnClose)) {
+                        plugin.runAsync(() -> this.updateItems(viewer, itemsOnClose, user));
                     }
-                }, () -> plugin.getLocales().getLocale("error_invalid_player")
-                        .ifPresent(player::sendMessage)));
+                }
+        );
     }
 
-    private void showInventoryMenu(@NotNull OnlineUser player, @NotNull UserDataSnapshot userDataSnapshot,
-                                   @NotNull User dataOwner, boolean allowEdit) {
-        CompletableFuture.runAsync(() -> {
-            final UserData data = userDataSnapshot.userData();
-            final ItemEditorMenu menu = ItemEditorMenu.createInventoryMenu(data.getInventoryData(),
-                    dataOwner, player, plugin.getLocales(), allowEdit);
-            plugin.getLocales().getLocale("viewing_inventory_of", dataOwner.username,
-                            DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT, Locale.getDefault())
-                                    .format(userDataSnapshot.versionTimestamp()))
-                    .ifPresent(player::sendMessage);
-            plugin.getDataEditor().openItemEditorMenu(player, menu).thenAccept(inventoryDataOnClose -> {
-                if (!menu.canEdit) {
-                    return;
-                }
-                final UserData updatedUserData = new UserData(data.getStatusData(), inventoryDataOnClose,
-                        data.getEnderChestData(), data.getPotionEffectsData(), data.getAdvancementData(),
-                        data.getStatisticsData(), data.getLocationData(),
-                        data.getPersistentDataContainerData(),
-                        plugin.getMinecraftVersion().toString());
-                plugin.getDatabase().setUserData(dataOwner, updatedUserData, DataSaveCause.INVENTORY_COMMAND).join();
-                plugin.getRedisManager().sendUserDataUpdate(dataOwner, updatedUserData).join();
-            });
+    // Creates a new snapshot with the updated inventory
+    @SuppressWarnings("DuplicatedCode")
+    private void updateItems(@NotNull OnlineUser viewer, @NotNull Data.Items.Items items, @NotNull User holder) {
+        final Optional<DataSnapshot.Packed> latestData = plugin.getDatabase().getLatestSnapshot(holder);
+        if (latestData.isEmpty()) {
+            plugin.getLocales().getLocale("error_no_data_to_display")
+                    .ifPresent(viewer::sendMessage);
+            return;
+        }
+
+        // Create and pack the snapshot with the updated inventory
+        final DataSnapshot.Packed snapshot = latestData.get().copy();
+        boolean pin = plugin.getSettings().getSynchronization().doAutoPin(saveCause);
+        snapshot.edit(plugin, (data) -> {
+            data.getInventory().ifPresent(inventory -> inventory.setContents(items));
+            data.setSaveCause(saveCause);
+            data.setPinned(pin);
+        });
+
+        // Save data
+        final RedisManager redis = plugin.getRedisManager();
+        plugin.getDataSyncer().saveData(holder, snapshot, (user, data) -> {
+            redis.getUserData(user).ifPresent(d -> redis.setUserData(user, snapshot));
+            redis.sendUserDataUpdate(user, data);
         });
     }
 
-    @Override
-    public List<String> onTabComplete(@NotNull String[] args) {
-        return plugin.getOnlineUsers().stream().map(user -> user.username)
-                .filter(argument -> argument.startsWith(args.length >= 1 ? args[0] : ""))
-                .sorted().collect(Collectors.toList());
-    }
 }

common/src/main/java/net/william278/husksync/command/ItemsCommand.java

@@ -0,0 +1,117 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.command;
+
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.user.CommandUser;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
+import net.william278.uniform.BaseCommand;
+import net.william278.uniform.Permission;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public abstract class ItemsCommand extends PluginCommand {
+
+    protected final DataSnapshot.SaveCause saveCause;
+
+    protected ItemsCommand(@NotNull String name, @NotNull List<String> aliases,
+                           @NotNull DataSnapshot.SaveCause saveCause, @NotNull HuskSync plugin) {
+        super(name, aliases, Permission.Default.IF_OP, ExecutionScope.IN_GAME, plugin);
+        this.saveCause = saveCause;
+    }
+
+    @Override
+    public void provide(@NotNull BaseCommand<?> command) {
+        command.addSyntax((ctx) -> {
+            final User user = ctx.getArgument("username", User.class);
+            final UUID version = ctx.getArgument("version", UUID.class);
+            final CommandUser executor = user(command, ctx);
+            if (!(executor instanceof OnlineUser online)) {
+                plugin.getLocales().getLocale("error_in_game_command_only")
+                        .ifPresent(executor::sendMessage);
+                return;
+            }
+            this.showSnapshotItems(online, user, version);
+        }, user("username"), versionUuid());
+        command.addSyntax((ctx) -> {
+            final User user = ctx.getArgument("username", User.class);
+            final CommandUser executor = user(command, ctx);
+            if (!(executor instanceof OnlineUser online)) {
+                plugin.getLocales().getLocale("error_in_game_command_only")
+                        .ifPresent(executor::sendMessage);
+                return;
+            }
+            this.showLatestItems(online, user);
+        }, user("username"));
+    }
+
+    // View (and edit) the latest user data
+    private void showLatestItems(@NotNull OnlineUser viewer, @NotNull User user) {
+        plugin.getRedisManager().getOnlineUserData(user.getUuid(), user, saveCause).thenAccept(d -> d
+                .or(() -> plugin.getDatabase().getLatestSnapshot(user))
+                .or(() -> {
+                    plugin.getLocales().getLocale("error_no_data_to_display")
+                            .ifPresent(viewer::sendMessage);
+                    return Optional.empty();
+                })
+                .flatMap(packed -> {
+                    if (packed.isInvalid()) {
+                        plugin.getLocales().getLocale("error_invalid_data", packed.getInvalidReason(plugin))
+                                .ifPresent(viewer::sendMessage);
+                        return Optional.empty();
+                    }
+                    return Optional.of(packed.unpack(plugin));
+                })
+                .ifPresent(snapshot -> this.showItems(
+                        viewer, snapshot, user, viewer.hasPermission(getPermission("edit"))
+                )));
+    }
+
+    // View a specific version of the user data
+    private void showSnapshotItems(@NotNull OnlineUser viewer, @NotNull User user, @NotNull UUID version) {
+        plugin.getDatabase().getSnapshot(user, version)
+                .or(() -> {
+                    plugin.getLocales().getLocale("error_invalid_version_uuid")
+                            .ifPresent(viewer::sendMessage);
+                    return Optional.empty();
+                })
+                .flatMap(packed -> {
+                    if (packed.isInvalid()) {
+                        plugin.getLocales().getLocale("error_invalid_data", packed.getInvalidReason(plugin))
+                                .ifPresent(viewer::sendMessage);
+                        return Optional.empty();
+                    }
+                    return Optional.of(packed.unpack(plugin));
+                })
+                .ifPresent(snapshot -> this.showItems(
+                        viewer, snapshot, user, false
+                ));
+    }
+
+    // Show a GUI menu with the correct item data from the snapshot
+    protected abstract void showItems(@NotNull OnlineUser viewer, @NotNull DataSnapshot.Unpacked snapshot,
+                                      @NotNull User user, boolean allowEdit);
+
+}

common/src/main/java/net/william278/husksync/command/Permission.java

@@ -1,96 +0,0 @@
-package net.william278.husksync.command;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Static plugin permission nodes required to execute commands
- */
-public enum Permission {
-
-    /*
-     * /husksync command permissions
-     */
-
-    /**
-     * Lets the user use the {@code /husksync} command (subcommand permissions required)
-     */
-    COMMAND_HUSKSYNC("husksync.command.husksync", DefaultAccess.EVERYONE),
-    /**
-     * Lets the user view plugin info {@code /husksync info}
-     */
-    COMMAND_HUSKSYNC_INFO("husksync.command.husksync.info", DefaultAccess.EVERYONE),
-    /**
-     * Lets the user reload the plugin {@code /husksync reload}
-     */
-    COMMAND_HUSKSYNC_RELOAD("husksync.command.husksync.reload", DefaultAccess.OPERATORS),
-    /**
-     * Lets the user view the plugin version and check for updates {@code /husksync update}
-     */
-    COMMAND_HUSKSYNC_UPDATE("husksync.command.husksync.update", DefaultAccess.OPERATORS),
-
-    /*
-     * /userdata command permissions
-     */
-
-    /**
-     * Lets the user view user data {@code /userdata view/list (player) (version_uuid)}
-     */
-    COMMAND_USER_DATA("husksync.command.userdata", DefaultAccess.OPERATORS),
-    /**
-     * Lets the user restore and delete user data {@code /userdata restore/delete (player) (version_uuid)}
-     */
-    COMMAND_USER_DATA_MANAGE("husksync.command.userdata.manage", DefaultAccess.OPERATORS),
-
-    /*
-     * /inventory command permissions
-     */
-
-    /**
-     * Lets the user use the {@code /inventory (player)} command and view offline players' inventories
-     */
-    COMMAND_INVENTORY("husksync.command.inventory", DefaultAccess.OPERATORS),
-    /**
-     * Lets the user edit the contents of offline players' inventories
-     */
-    COMMAND_INVENTORY_EDIT("husksync.command.inventory.edit", DefaultAccess.OPERATORS),
-
-    /*
-     * /enderchest command permissions
-     */
-
-    /**
-     * Lets the user use the {@code /enderchest (player)} command and view offline players' ender chests
-     */
-    COMMAND_ENDER_CHEST("husksync.command.enderchest", DefaultAccess.OPERATORS),
-    /**
-     * Lets the user edit the contents of offline players' ender chests
-     */
-    COMMAND_ENDER_CHEST_EDIT("husksync.command.enderchest.edit", DefaultAccess.OPERATORS);
-
-
-    public final String node;
-    public final DefaultAccess defaultAccess;
-
-    Permission(@NotNull String node, @NotNull DefaultAccess defaultAccess) {
-        this.node = node;
-        this.defaultAccess = defaultAccess;
-    }
-
-    /**
-     * Identifies who gets what permissions by default
-     */
-    public enum DefaultAccess {
-        /**
-         * Everyone gets this permission node by default
-         */
-        EVERYONE,
-        /**
-         * Nobody gets this permission node by default
-         */
-        NOBODY,
-        /**
-         * Server operators ({@code /op}) get this permission node by default
-         */
-        OPERATORS
-    }
-}

common/src/main/java/net/william278/husksync/command/PluginCommand.java

@@ -0,0 +1,154 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.command;
+
+import com.mojang.brigadier.context.CommandContext;
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.user.CommandUser;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
+import net.william278.uniform.BaseCommand;
+import net.william278.uniform.Command;
+import net.william278.uniform.Permission;
+import net.william278.uniform.element.ArgumentElement;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.UUID;
+import java.util.function.Function;
+
+public abstract class PluginCommand extends Command {
+
+    protected final HuskSync plugin;
+
+    protected PluginCommand(@NotNull String name, @NotNull List<String> aliases, @NotNull Permission.Default defPerm,
+                            @NotNull ExecutionScope scope, @NotNull HuskSync plugin) {
+        super(name, aliases, getDescription(plugin, name), new Permission(createPermission(name), defPerm), scope);
+        this.plugin = plugin;
+    }
+
+    private static String getDescription(@NotNull HuskSync plugin, @NotNull String name) {
+        return plugin.getLocales().getRawLocale("%s_command_description".formatted(name)).orElse("");
+    }
+
+    @NotNull
+    private static String createPermission(@NotNull String name, @NotNull String... sub) {
+        return "husksync.command." + name + (sub.length > 0 ? "." + String.join(".", sub) : "");
+    }
+
+    @NotNull
+    protected String getPermission(@NotNull String... sub) {
+        return createPermission(this.getName(), sub);
+    }
+
+    @NotNull
+    @SuppressWarnings("rawtypes")
+    protected CommandUser user(@NotNull BaseCommand base, @NotNull CommandContext context) {
+        return adapt(base.getUser(context.getSource()));
+    }
+
+    @NotNull
+    protected Permission needsOp(@NotNull String... nodes) {
+        return new Permission(getPermission(nodes), Permission.Default.IF_OP);
+    }
+
+    @NotNull
+    protected CommandUser adapt(net.william278.uniform.CommandUser user) {
+        return user.getUuid() == null ? plugin.getConsole() : plugin.getOnlineUser(user.getUuid()).orElseThrow();
+    }
+
+    @NotNull
+    @SuppressWarnings("SameParameterValue")
+    protected <S> ArgumentElement<S, OnlineUser> onlineUser(@NotNull String name) {
+        return new ArgumentElement<>(name, reader -> {
+            final String username = reader.readString();
+            return plugin.getOnlineUsers().stream()
+                    .filter(user -> username.equals(user.getName()))
+                    .findFirst().orElse(null);
+        }, (context, builder) -> {
+            plugin.getOnlineUsers().forEach(u -> builder.suggest(u.getName()));
+            return builder.buildFuture();
+        });
+    }
+
+    @NotNull
+    protected <S> ArgumentElement<S, User> user(@NotNull String name) {
+        return new ArgumentElement<>(name, reader -> {
+            final String username = reader.readString();
+            return plugin.getDatabase().getUserByName(username).orElseThrow(
+                    () -> CommandSyntaxException.BUILT_IN_EXCEPTIONS.dispatcherUnknownArgument().createWithContext(reader)
+            );
+        }, (context, builder) -> {
+            plugin.getOnlineUsers().forEach(u -> builder.suggest(u.getName()));
+            return builder.buildFuture();
+        });
+    }
+
+    @NotNull
+    protected  <S> ArgumentElement<S, UUID> versionUuid() {
+        return new ArgumentElement<>("version", reader -> {
+            try {
+                return UUID.fromString(reader.readString());
+            } catch (IllegalArgumentException e) {
+                throw CommandSyntaxException.BUILT_IN_EXCEPTIONS.dispatcherUnknownArgument().createWithContext(reader);
+            }
+        }, (context, builder) -> {
+            try {
+                plugin.getDatabase().getAllSnapshots(context.getArgument("username", User.class))
+                        .stream().sorted(Comparator.comparing(d -> d.getTimestamp().toEpochSecond()))
+                        .forEach(id -> builder.suggest(id.getId().toString()));
+                return builder.buildFuture();
+            } catch (IllegalArgumentException e) {
+                return builder.buildFuture();
+            }
+        });
+    }
+
+    public enum Type {
+
+        HUSKSYNC_COMMAND(HuskSyncCommand::new),
+        USERDATA_COMMAND(UserDataCommand::new),
+        INVENTORY_COMMAND(InventoryCommand::new),
+        ENDER_CHEST_COMMAND(EnderChestCommand::new);
+
+        public final Function<HuskSync, PluginCommand> commandSupplier;
+
+        Type(@NotNull Function<HuskSync, PluginCommand> supplier) {
+            this.commandSupplier = supplier;
+        }
+
+        @NotNull
+        public PluginCommand supply(@NotNull HuskSync plugin) {
+            return commandSupplier.apply(plugin);
+        }
+
+        @NotNull
+        public static PluginCommand[] create(@NotNull HuskSync plugin) {
+            return Arrays.stream(values()).map(type -> type.supply(plugin))
+                    .filter(command -> !plugin.getSettings().isCommandDisabled(command))
+                    .toArray(PluginCommand[]::new);
+        }
+
+    }
+
+}

common/src/main/java/net/william278/husksync/command/TabCompletable.java

@@ -1,20 +0,0 @@
-package net.william278.husksync.command;
-
-import org.jetbrains.annotations.NotNull;
-
-import java.util.List;
-
-/**
- * Interface providing tab completions for a command
- */
-public interface TabCompletable {
-
-    /**
-     * What should be returned when the player or console attempts to TAB-complete a command
-     *
-     * @param args Current command arguments
-     * @return List of String arguments to offer TAB suggestions
-     */
-    List<String> onTabComplete(@NotNull String[] args);
-
-}

common/src/main/java/net/william278/husksync/command/UserDataCommand.java

@@ -1,239 +1,327 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.command;
 
+import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.event.ClickEvent;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextDecoration;
 import net.william278.husksync.HuskSync;
-import net.william278.husksync.data.DataSaveCause;
-import net.william278.husksync.player.OnlineUser;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.redis.RedisManager;
+import net.william278.husksync.user.CommandUser;
+import net.william278.husksync.user.OnlineUser;
+import net.william278.husksync.user.User;
+import net.william278.husksync.util.DataSnapshotList;
+import net.william278.husksync.util.DataSnapshotOverview;
+import net.william278.husksync.util.UserDataDumper;
+import net.william278.uniform.BaseCommand;
+import net.william278.uniform.CommandProvider;
+import net.william278.uniform.Permission;
+import net.william278.uniform.element.ArgumentElement;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
+import java.util.Optional;
 import java.util.UUID;
-import java.util.concurrent.CompletableFuture;
-import java.util.stream.Collectors;
+import java.util.logging.Level;
 
-public class UserDataCommand extends CommandBase implements TabCompletable {
+public class UserDataCommand extends PluginCommand {
 
-    private final String[] COMMAND_ARGUMENTS = {"view", "list", "delete", "restore", "pin"};
-
-    public UserDataCommand(@NotNull HuskSync implementor) {
-        super("userdata", Permission.COMMAND_USER_DATA, implementor, "playerdata");
+    public UserDataCommand(@NotNull HuskSync plugin) {
+        super("userdata", List.of("playerdata"), Permission.Default.IF_OP, ExecutionScope.ALL, plugin);
     }
 
     @Override
-    public void onExecute(@NotNull OnlineUser player, @NotNull String[] args) {
-        if (args.length < 1) {
-            plugin.getLocales().getLocale("error_invalid_syntax",
-                            "/userdata <view/list/delete/restore/pin> <username> [version_uuid]")
-                    .ifPresent(player::sendMessage);
+    public void provide(@NotNull BaseCommand<?> command) {
+        command.addSubCommand("view", needsOp("view"), view());
+        command.addSubCommand("list", needsOp("list"), list());
+        command.addSubCommand("delete", needsOp("delete"), delete());
+        command.addSubCommand("save", needsOp("save"), save());
+        command.addSubCommand("restore", needsOp("restore"), restore());
+        command.addSubCommand("pin", needsOp("pin"), pin());
+        command.addSubCommand("dump", needsOp("dump"), dump());
+    }
+
+    // Show the latest snapshot
+    private void viewLatestSnapshot(@NotNull CommandUser executor, @NotNull User user) {
+        plugin.getDatabase().getLatestSnapshot(user).ifPresentOrElse(
+                data -> {
+                    if (data.isInvalid()) {
+                        plugin.getLocales().getLocale("error_invalid_data", data.getInvalidReason(plugin))
+                                .ifPresent(executor::sendMessage);
+                        return;
+                    }
+                    DataSnapshotOverview.of(data.unpack(plugin), data.getFileSize(plugin), user, plugin)
+                            .show(executor);
+                },
+                () -> plugin.getLocales().getLocale("error_no_data_to_display")
+                        .ifPresent(executor::sendMessage)
+        );
+    }
+
+    // Show the specified snapshot
+    private void viewSnapshot(@NotNull CommandUser executor, @NotNull User user, @NotNull UUID version) {
+        plugin.getDatabase().getSnapshot(user, version).ifPresentOrElse(
+                data -> {
+                    if (data.isInvalid()) {
+                        plugin.getLocales().getLocale("error_invalid_data", data.getInvalidReason(plugin))
+                                .ifPresent(executor::sendMessage);
+                        return;
+                    }
+                    DataSnapshotOverview.of(data.unpack(plugin), data.getFileSize(plugin), user, plugin)
+                            .show(executor);
+                },
+                () -> plugin.getLocales().getLocale("error_invalid_version_uuid")
+                        .ifPresent(executor::sendMessage)
+        );
+    }
+
+    // View a list of snapshots
+    private void listSnapshots(@NotNull CommandUser executor, @NotNull User user, int page) {
+        final List<DataSnapshot.Packed> dataList = plugin.getDatabase().getAllSnapshots(user);
+        if (dataList.isEmpty()) {
+            plugin.getLocales().getLocale("error_no_data_to_display")
+                    .ifPresent(executor::sendMessage);
+            return;
+        }
+        DataSnapshotList.create(dataList, user, plugin).displayPage(executor, page);
+    }
+
+    // Create and save a snapshot of a user's current data
+    private void createAndSaveSnapshot(@NotNull CommandUser executor, @NotNull OnlineUser onlineUser) {
+        plugin.getDataSyncer().saveCurrentUserData(onlineUser, DataSnapshot.SaveCause.SAVE_COMMAND);
+        plugin.getLocales().getLocale("data_saved", onlineUser.getName())
+                .ifPresent(executor::sendMessage);
+    }
+
+    // Delete a snapshot
+    private void deleteSnapshot(@NotNull CommandUser executor, @NotNull User user, @NotNull UUID version) {
+        if (!plugin.getDatabase().deleteSnapshot(user, version)) {
+            plugin.getLocales().getLocale("error_invalid_version_uuid")
+                    .ifPresent(executor::sendMessage);
+            return;
+        }
+        plugin.getRedisManager().clearUserData(user);
+        plugin.getLocales().getLocale("data_deleted",
+                        version.toString().split("-")[0],
+                        version.toString(),
+                        user.getName(),
+                        user.getUuid().toString())
+                .ifPresent(executor::sendMessage);
+    }
+
+    // Restore a snapshot
+    private void restoreSnapshot(@NotNull CommandUser executor, @NotNull User user, @NotNull UUID version) {
+        final Optional<DataSnapshot.Packed> optionalData = plugin.getDatabase().getSnapshot(user, version);
+        if (optionalData.isEmpty()) {
+            plugin.getLocales().getLocale("error_invalid_version_uuid")
+                    .ifPresent(executor::sendMessage);
             return;
         }
 
-        switch (args[0].toLowerCase()) {
-            case "view" -> {
-                if (args.length < 2) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata view <username> [version_uuid]")
-                            .ifPresent(player::sendMessage);
-                    return;
-                }
-                final String username = args[1];
-                if (args.length >= 3) {
-                    try {
-                        final UUID versionUuid = UUID.fromString(args[2]);
-                        CompletableFuture.runAsync(() -> plugin.getDatabase().getUserByName(username.toLowerCase()).thenAccept(
-                                optionalUser -> optionalUser.ifPresentOrElse(
-                                        user -> plugin.getDatabase().getUserData(user, versionUuid).thenAccept(data ->
-                                                data.ifPresentOrElse(userData -> plugin.getDataEditor()
-                                                                .displayDataOverview(player, userData, user),
-                                                        () -> plugin.getLocales().getLocale("error_invalid_version_uuid")
-                                                                .ifPresent(player::sendMessage))),
-                                        () -> plugin.getLocales().getLocale("error_invalid_player")
-                                                .ifPresent(player::sendMessage))));
-                    } catch (IllegalArgumentException e) {
-                        plugin.getLocales().getLocale("error_invalid_syntax",
-                                        "/userdata view <username> [version_uuid]")
-                                .ifPresent(player::sendMessage);
-                    }
-                } else {
-                    CompletableFuture.runAsync(() -> plugin.getDatabase().getUserByName(username.toLowerCase()).thenAccept(
-                            optionalUser -> optionalUser.ifPresentOrElse(
-                                    user -> plugin.getDatabase().getCurrentUserData(user).thenAccept(
-                                            latestData -> latestData.ifPresentOrElse(
-                                                    userData -> plugin.getDataEditor()
-                                                            .displayDataOverview(player, userData, user),
-                                                    () -> plugin.getLocales().getLocale("error_no_data_to_display")
-                                                            .ifPresent(player::sendMessage))),
-                                    () -> plugin.getLocales().getLocale("error_invalid_player")
-                                            .ifPresent(player::sendMessage))));
-                }
-            }
-            case "list" -> {
-                if (!player.hasPermission(Permission.COMMAND_USER_DATA_MANAGE.node)) {
-                    plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-                    return;
-                }
-                if (args.length < 2) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata list <username>")
-                            .ifPresent(player::sendMessage);
-                    return;
-                }
-                final String username = args[1];
-                CompletableFuture.runAsync(() -> plugin.getDatabase().getUserByName(username.toLowerCase()).thenAccept(
-                        optionalUser -> optionalUser.ifPresentOrElse(
-                                user -> plugin.getDatabase().getUserData(user).thenAccept(dataList -> {
-                                    if (dataList.isEmpty()) {
-                                        plugin.getLocales().getLocale("error_no_data_to_display")
-                                                .ifPresent(player::sendMessage);
-                                        return;
-                                    }
-                                    plugin.getDataEditor().displayDataList(player, dataList, user);
-                                }),
-                                () -> plugin.getLocales().getLocale("error_invalid_player")
-                                        .ifPresent(player::sendMessage))));
-            }
-            case "delete" -> {
-                if (!player.hasPermission(Permission.COMMAND_USER_DATA_MANAGE.node)) {
-                    plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-                    return;
-                }
-                // Delete user data by specified UUID
-                if (args.length < 3) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata delete <username> <version_uuid>")
-                            .ifPresent(player::sendMessage);
-                    return;
-                }
-                final String username = args[1];
-                try {
-                    final UUID versionUuid = UUID.fromString(args[2]);
-                    CompletableFuture.runAsync(() -> plugin.getDatabase().getUserByName(username.toLowerCase()).thenAccept(
-                            optionalUser -> optionalUser.ifPresentOrElse(
-                                    user -> plugin.getDatabase().deleteUserData(user, versionUuid).thenAccept(deleted -> {
-                                        if (deleted) {
-                                            plugin.getLocales().getLocale("data_deleted",
-                                                            versionUuid.toString().split("-")[0],
-                                                            versionUuid.toString(),
-                                                            user.username,
-                                                            user.uuid.toString())
-                                                    .ifPresent(player::sendMessage);
-                                        } else {
-                                            plugin.getLocales().getLocale("error_invalid_version_uuid")
-                                                    .ifPresent(player::sendMessage);
-                                        }
-                                    }),
-                                    () -> plugin.getLocales().getLocale("error_invalid_player")
-                                            .ifPresent(player::sendMessage))));
-                } catch (IllegalArgumentException e) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata delete <username> <version_uuid>")
-                            .ifPresent(player::sendMessage);
-                }
-            }
-            case "restore" -> {
-                if (!player.hasPermission(Permission.COMMAND_USER_DATA_MANAGE.node)) {
-                    plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-                    return;
-                }
-                // Get user data by specified uuid and username
-                if (args.length < 3) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata restore <username> <version_uuid>")
-                            .ifPresent(player::sendMessage);
-                    return;
-                }
-                final String username = args[1];
-                try {
-                    final UUID versionUuid = UUID.fromString(args[2]);
-                    CompletableFuture.runAsync(() -> plugin.getDatabase().getUserByName(username.toLowerCase()).thenAccept(
-                            optionalUser -> optionalUser.ifPresentOrElse(
-                                    user -> plugin.getDatabase().getUserData(user, versionUuid).thenAccept(data -> {
-                                        if (data.isEmpty()) {
-                                            plugin.getLocales().getLocale("error_invalid_version_uuid")
-                                                    .ifPresent(player::sendMessage);
-                                            return;
-                                        }
-                                        plugin.getDatabase().setUserData(user, data.get().userData(),
-                                                DataSaveCause.BACKUP_RESTORE);
-                                        plugin.getRedisManager().sendUserDataUpdate(user, data.get().userData()).join();
-                                        plugin.getLocales().getLocale("data_restored",
-                                                        user.username,
-                                                        user.uuid.toString(),
-                                                        versionUuid.toString().split("-")[0],
-                                                        versionUuid.toString())
-                                                .ifPresent(player::sendMessage);
-                                    }),
-                                    () -> plugin.getLocales().getLocale("error_invalid_player")
-                                            .ifPresent(player::sendMessage))));
-                } catch (IllegalArgumentException e) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata restore <username> <version_uuid>")
-                            .ifPresent(player::sendMessage);
-                }
-            }
-            case "pin" -> {
-                if (!player.hasPermission(Permission.COMMAND_USER_DATA_MANAGE.node)) {
-                    plugin.getLocales().getLocale("error_no_permission").ifPresent(player::sendMessage);
-                    return;
-                }
-                if (args.length < 3) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata pin <username> <version_uuid>")
-                            .ifPresent(player::sendMessage);
-                    return;
-                }
-                final String username = args[1];
-                try {
-                    final UUID versionUuid = UUID.fromString(args[2]);
-                    CompletableFuture.runAsync(() -> plugin.getDatabase().getUserByName(username.toLowerCase()).thenAccept(
-                            optionalUser -> optionalUser.ifPresentOrElse(
-                                    user -> plugin.getDatabase().getUserData(user, versionUuid).thenAccept(
-                                            optionalUserData -> optionalUserData.ifPresentOrElse(userData -> {
-                                                if (userData.pinned()) {
-                                                    plugin.getDatabase().unpinUserData(user, versionUuid).join();
-                                                    plugin.getLocales().getLocale("data_unpinned",
-                                                                    versionUuid.toString().split("-")[0],
-                                                                    versionUuid.toString(),
-                                                                    user.username,
-                                                                    user.uuid.toString())
-                                                            .ifPresent(player::sendMessage);
-                                                } else {
-                                                    plugin.getDatabase().pinUserData(user, versionUuid).join();
-                                                    plugin.getLocales().getLocale("data_pinned",
-                                                                    versionUuid.toString().split("-")[0],
-                                                                    versionUuid.toString(),
-                                                                    user.username,
-                                                                    user.uuid.toString())
-                                                            .ifPresent(player::sendMessage);
-                                                }
-                                            }, () -> plugin.getLocales().getLocale("error_invalid_version_uuid")
-                                                    .ifPresent(player::sendMessage))),
-                                    () -> plugin.getLocales().getLocale("error_invalid_player")
-                                            .ifPresent(player::sendMessage))));
-                } catch (IllegalArgumentException e) {
-                    plugin.getLocales().getLocale("error_invalid_syntax",
-                                    "/userdata pin <username> <version_uuid>")
-                            .ifPresent(player::sendMessage);
-                }
-            }
+        // Restore users with a minimum of one health (prevent restoring players with <= 0 health)
+        final DataSnapshot.Packed data = optionalData.get().copy();
+        if (data.isInvalid()) {
+            plugin.getLocales().getLocale("error_invalid_data", data.getInvalidReason(plugin))
+                    .ifPresent(executor::sendMessage);
+            return;
+        }
+        data.edit(plugin, (unpacked -> {
+            unpacked.getHealth().ifPresent(status -> status.setHealth(Math.max(1, status.getHealth())));
+            unpacked.setSaveCause(DataSnapshot.SaveCause.BACKUP_RESTORE);
+            unpacked.setPinned(
+                    plugin.getSettings().getSynchronization().doAutoPin(DataSnapshot.SaveCause.BACKUP_RESTORE)
+            );
+        }));
+
+        // Save data
+        final RedisManager redis = plugin.getRedisManager();
+        plugin.getDataSyncer().saveData(user, data, (u, s) -> {
+            redis.getUserData(u).ifPresent(d -> redis.setUserData(u, s));
+            redis.sendUserDataUpdate(u, s);
+            plugin.getLocales().getLocale("data_restored", u.getName(), u.getUuid().toString(),
+                    s.getShortId(), s.getId().toString()).ifPresent(executor::sendMessage);
+        });
+    }
+
+    // Pin a snapshot
+    private void pinSnapshot(@NotNull CommandUser executor, @NotNull User user, @NotNull UUID version) {
+        final Optional<DataSnapshot.Packed> optionalData = plugin.getDatabase().getSnapshot(user, version);
+        if (optionalData.isEmpty()) {
+            plugin.getLocales().getLocale("error_invalid_version_uuid")
+                    .ifPresent(executor::sendMessage);
+            return;
+        }
+
+        // Pin or unpin the data
+        final DataSnapshot.Packed data = optionalData.get();
+        if (data.isPinned()) {
+            plugin.getDatabase().unpinSnapshot(user, data.getId());
+        } else {
+            plugin.getDatabase().pinSnapshot(user, data.getId());
+        }
+        plugin.getLocales().getLocale(data.isPinned() ? "data_unpinned" : "data_pinned", data.getShortId(),
+                        data.getId().toString(), user.getName(), user.getUuid().toString())
+                .ifPresent(executor::sendMessage);
+    }
+
+    // Lookup a snapshot by UUID and dump
+    private void dumpSnapshot(@NotNull CommandUser executor, @NotNull User user, @NotNull UUID version,
+                              @NotNull DumpType type) {
+        final Optional<DataSnapshot.Packed> data = plugin.getDatabase().getSnapshot(user, version);
+        if (data.isEmpty()) {
+            plugin.getLocales().getLocale("error_invalid_version_uuid")
+                    .ifPresent(executor::sendMessage);
+            return;
+        }
+        this.dumpSnapshot(executor, user, data.get(), type);
+    }
+
+    // Dump a snapshot
+    private void dumpSnapshot(@NotNull CommandUser executor, @NotNull User user,
+                              @NotNull DataSnapshot.Packed userData, @NotNull DumpType type) {
+        final UserDataDumper dumper = UserDataDumper.create(userData, user, plugin);
+        try {
+            final String url = type == DumpType.WEB ? dumper.toWeb() : dumper.toFile();
+            plugin.getLocales().getLocale("data_dumped", userData.getShortId(), user.getName())
+                    .ifPresent(executor::sendMessage);
+            executor.sendMessage(Component.text(url)
+                    .clickEvent(type == DumpType.WEB ? ClickEvent.openUrl(url) : ClickEvent.copyToClipboard(url))
+                    .decorate(TextDecoration.UNDERLINED).color(NamedTextColor.GRAY));
+        } catch (Throwable e) {
+            plugin.log(Level.SEVERE, "Failed to dump user data", e);
         }
     }
 
-    @Override
-    public List<String> onTabComplete(@NotNull String[] args) {
-        switch (args.length) {
-            case 0, 1 -> {
-                return Arrays.stream(COMMAND_ARGUMENTS)
-                        .filter(argument -> argument.startsWith(args.length >= 1 ? args[0] : ""))
-                        .sorted().collect(Collectors.toList());
-            }
-            case 2 -> {
-                return plugin.getOnlineUsers().stream().map(user -> user.username)
-                        .filter(argument -> argument.startsWith(args[1]))
-                        .sorted().collect(Collectors.toList());
-            }
-        }
-        return Collections.emptyList();
+    @NotNull
+    private CommandProvider view() {
+        return (sub) -> {
+            sub.addSyntax((ctx) -> {
+                final User user = ctx.getArgument("username", User.class);
+                final UUID version = ctx.getArgument("version", UUID.class);
+                viewSnapshot(user(sub, ctx), user, version);
+            }, user("username"), versionUuid());
+            sub.addSyntax((ctx) -> {
+                final User user = ctx.getArgument("username", User.class);
+                viewLatestSnapshot(user(sub, ctx), user);
+            }, user("username"));
+        };
     }
+
+    @NotNull
+    private CommandProvider list() {
+        return (sub) -> {
+            sub.addSyntax((ctx) -> {
+                final User user = ctx.getArgument("username", User.class);
+                listSnapshots(user(sub, ctx), user, 1);
+            }, user("username"));
+            sub.addSyntax((ctx) -> {
+                final User user = ctx.getArgument("username", User.class);
+                final int page = ctx.getArgument("page", Integer.class);
+                listSnapshots(user(sub, ctx), user, page);
+            }, user("username"), BaseCommand.intNum("page", 1));
+        };
+    }
+
+    @NotNull
+    private CommandProvider delete() {
+        return (sub) -> sub.addSyntax((ctx) -> {
+            final User user = ctx.getArgument("username", User.class);
+            final UUID version = ctx.getArgument("version", UUID.class);
+            deleteSnapshot(user(sub, ctx), user, version);
+        }, user("username"), versionUuid());
+    }
+
+    @NotNull
+    private CommandProvider save() {
+        return (sub) -> sub.addSyntax((ctx) -> {
+            final OnlineUser user = ctx.getArgument("username", OnlineUser.class);
+            createAndSaveSnapshot(user(sub, ctx), user);
+        }, onlineUser("username"));
+    }
+
+    @NotNull
+    private CommandProvider restore() {
+        return (sub) -> sub.addSyntax((ctx) -> {
+            final User user = ctx.getArgument("username", User.class);
+            final UUID version = ctx.getArgument("version", UUID.class);
+            restoreSnapshot(user(sub, ctx), user, version);
+        }, user("username"), versionUuid());
+    }
+
+    @NotNull
+    private CommandProvider pin() {
+        return (sub) -> sub.addSyntax((ctx) -> {
+            final User user = ctx.getArgument("username", User.class);
+            final UUID version = ctx.getArgument("version", UUID.class);
+            pinSnapshot(user(sub, ctx), user, version);
+        }, user("username"), versionUuid());
+    }
+
+    @NotNull
+    private CommandProvider dump() {
+        return (sub) -> {
+            sub.addSyntax((ctx) -> {
+                final User user = ctx.getArgument("username", User.class);
+                final CommandUser executor = user(sub, ctx);
+                plugin.getRedisManager()
+                        .getOnlineUserData(UUID.randomUUID(), user, DataSnapshot.SaveCause.DUMP_COMMAND)
+                        .thenAccept((data) -> data
+                                .or(() -> plugin.getDatabase().getLatestSnapshot(user))
+                                .ifPresentOrElse(
+                                        (s) -> dumpSnapshot(executor, user, s, DumpType.WEB),
+                                        () -> plugin.getLocales().getLocale("error_no_data_to_display")
+                                                .ifPresent(executor::sendMessage)
+                                ));
+            }, user("username"));
+            sub.addSyntax((ctx) -> {
+                final User user = ctx.getArgument("username", User.class);
+                final UUID version = ctx.getArgument("version", UUID.class);
+                final DumpType type = ctx.getArgument("type", DumpType.class);
+                dumpSnapshot(user(sub, ctx), user, version, type);
+            }, user("username"), versionUuid(), dumpType());
+        };
+    }
+
+    private <S> ArgumentElement<S, DumpType> dumpType() {
+        return new ArgumentElement<>("type", reader -> {
+            final String type = reader.readString();
+            return switch (type.toLowerCase(Locale.ENGLISH)) {
+                case "web" -> DumpType.WEB;
+                case "file" -> DumpType.FILE;
+                default -> throw CommandSyntaxException.BUILT_IN_EXCEPTIONS
+                        .dispatcherUnknownArgument().createWithContext(reader);
+            };
+        }, (context, builder) -> {
+            builder.suggest("web");
+            builder.suggest("file");
+            return builder.buildFuture();
+        });
+    }
+
+    enum DumpType {
+        WEB,
+        FILE
+    }
+
 }

common/src/main/java/net/william278/husksync/config/ConfigProvider.java

@@ -0,0 +1,164 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.config;
+
+
+import de.exlll.configlib.NameFormatters;
+import de.exlll.configlib.YamlConfigurationProperties;
+import de.exlll.configlib.YamlConfigurationStore;
+import de.exlll.configlib.YamlConfigurations;
+import net.william278.husksync.HuskSync;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.logging.Level;
+
+/**
+ * Interface for getting and setting data from plugin configuration files
+ *
+ * @since 1.0
+ */
+public interface ConfigProvider {
+
+    @NotNull
+    YamlConfigurationProperties.Builder<?> YAML_CONFIGURATION_PROPERTIES = YamlConfigurationProperties.newBuilder()
+            .charset(StandardCharsets.UTF_8)
+            .setNameFormatter(NameFormatters.LOWER_UNDERSCORE);
+
+    /**
+     * Get the plugin settings, read from the config file
+     *
+     * @return the plugin settings
+     * @since 1.0
+     */
+    @NotNull
+    Settings getSettings();
+
+    /**
+     * Set the plugin settings
+     *
+     * @param settings The settings to set
+     * @since 1.0
+     */
+    void setSettings(@NotNull Settings settings);
+
+    /**
+     * Load the plugin settings from the config file
+     *
+     * @since 1.0
+     */
+    default void loadSettings() {
+        setSettings(YamlConfigurations.update(
+                getConfigDirectory().resolve("config.yml"),
+                Settings.class,
+                YAML_CONFIGURATION_PROPERTIES.header(Settings.CONFIG_HEADER).build()
+        ));
+    }
+
+    /**
+     * Get the locales for the plugin
+     *
+     * @return the locales for the plugin
+     * @since 1.0
+     */
+    @NotNull
+    Locales getLocales();
+
+    /**
+     * Set the locales for the plugin
+     *
+     * @param locales The locales to set
+     * @since 1.0
+     */
+    void setLocales(@NotNull Locales locales);
+
+    /**
+     * Load the locales from the config file
+     *
+     * @since 1.0
+     */
+    default void loadLocales() {
+        final YamlConfigurationStore<Locales> store = new YamlConfigurationStore<>(
+                Locales.class, YAML_CONFIGURATION_PROPERTIES.header(Locales.CONFIG_HEADER).build()
+        );
+        // Read existing locales if present
+        final Path path = getConfigDirectory().resolve(String.format("messages-%s.yml", getSettings().getLanguage()));
+        if (Files.exists(path)) {
+            setLocales(store.load(path));
+            return;
+        }
+
+        // Otherwise, save and read the default locales
+        try (InputStream input = getResource(String.format("locales/%s.yml", getSettings().getLanguage()))) {
+            final Locales locales = store.read(input);
+            store.save(locales, path);
+            setLocales(locales);
+        } catch (Throwable e) {
+            getPlugin().log(Level.SEVERE, "An error occurred loading the locales (invalid lang code?)", e);
+        }
+    }
+
+    @NotNull
+    String getServerName();
+
+    void setServerName(@NotNull Server server);
+
+    default void loadServer() {
+        setServerName(YamlConfigurations.update(
+                getConfigDirectory().resolve("server.yml"),
+                Server.class,
+                YAML_CONFIGURATION_PROPERTIES.header(Server.CONFIG_HEADER).build()
+        ));
+    }
+
+    default void validateConfigFiles() {
+        // Validate server name is default
+        if (getServerName().equals("server")) {
+            getPlugin().log(Level.WARNING, "The server name set in ~/plugins/HuskSync/server.yml appears to" +
+                    "be unchanged from the default (currently set to: \"server\"). Please check that this value has" +
+                    "been updated to match the case-sensitive ID of this server in your proxy config file!");
+        }
+    }
+
+    /**
+     * Get a plugin resource
+     *
+     * @param name The name of the resource
+     * @return the resource, if found
+     * @since 1.0
+     */
+    InputStream getResource(@NotNull String name);
+
+    /**
+     * Get the plugin config directory
+     *
+     * @return the plugin config directory
+     * @since 1.0
+     */
+    @NotNull
+    Path getConfigDirectory();
+
+    @NotNull
+    HuskSync getPlugin();
+
+}

common/src/main/java/net/william278/husksync/config/Locales.java

@@ -1,54 +1,75 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.config;
 
-import de.themoep.minedown.MineDown;
-import dev.dejvokep.boostedyaml.YamlDocument;
+import com.google.common.collect.Maps;
+import de.exlll.configlib.Configuration;
+import de.themoep.minedown.adventure.MineDown;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import net.william278.paginedown.ListOptions;
+import org.apache.commons.text.StringEscapeUtils;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.HashMap;
+import java.util.Arrays;
+import java.util.Map;
 import java.util.Optional;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 /**
- * Loaded locales used by the plugin to display various locales
+ * Plugin locale configuration
+ *
+ * @since 1.0
  */
+@SuppressWarnings("FieldMayBeFinal")
+@Configuration
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class Locales {
 
-    public static final String PLUGIN_INFORMATION = """
-            [HuskSync](#00fb9a bold) [| Version %version%](#00fb9a)
-            [A modern, cross-server player data synchronization system](gray)
-            [• Author:](white) [William278](gray show_text=&7Click to visit website open_url=https://william278.net)
-            [• Contributors:](white) [HarvelsX](gray show_text=&7Code), [HookWoods](gray show_text=&7Code)
-            [• Translators:](white) [Namiu](gray show_text=&7\\(うにたろう\\) - Japanese, ja-jp), [anchelthe](gray show_text=&7Spanish, es-es), [Melonzio](gray show_text=&7Spanish, es-es), [Ceddix](gray show_text=&7German, de-de), [mateusneresrb](gray show_text=&7Brazilian Portuguese, pt-br], [小蔡](gray show_text=&7Traditional Chinese, zh-tw), [Ghost-chu](gray show_text=&7Simplified Chinese, zh-cn), [DJelly4K](gray show_text=&7Simplified Chinese, zh-cn), [Thourgard](gray show_text=&7Ukrainian, uk-ua), [xF3d3](gray show_text=&7Italian, it-it)
-            [• Documentation:](white) [[Link]](#00fb9a show_text=&7Click to open link open_url=https://william278.net/docs/husksync/Home/)
-            [• Bug reporting:](white) [[Link]](#00fb9a show_text=&7Click to open link open_url=https://github.com/WiIIiam278/HuskSync/issues)
-            [• Discord support:](white) [[Link]](#00fb9a show_text=&7Click to join open_url=https://discord.gg/tVYhJfyDWG)""";
+    static final String CONFIG_HEADER = """
+            ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+            ┃      HuskSync - Locales      ┃
+            ┃    Developed by William278   ┃
+            ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+            ┣╸ See plugin about menu for international locale credits
+            ┣╸ Formatted in MineDown: https://github.com/Phoenix616/MineDown
+            ┗╸ Translate HuskSync: https://william278.net/docs/husksync/translations""";
 
-    @NotNull
-    private final HashMap<String, String> rawLocales;
+    protected static final String DEFAULT_LOCALE = "en-gb";
 
-    private Locales(@NotNull YamlDocument localesConfig) {
-        this.rawLocales = new HashMap<>();
-        for (String localeId : localesConfig.getRoutesAsStrings(false)) {
-            rawLocales.put(localeId, localesConfig.getString(localeId));
-        }
-    }
+    // The raw set of locales loaded from yaml
+    Map<String, String> locales = Maps.newTreeMap();
 
     /**
-     * Returns an un-formatted locale loaded from the locales file
+     * Returns a raw, unformatted locale loaded from the locale file
      *
      * @param localeId String identifier of the locale, corresponding to a key in the file
      * @return An {@link Optional} containing the locale corresponding to the id, if it exists
      */
     public Optional<String> getRawLocale(@NotNull String localeId) {
-        if (rawLocales.containsKey(localeId)) {
-            return Optional.of(rawLocales.get(localeId).replaceAll(Pattern.quote("\\n"), "\n"));
-        }
-        return Optional.empty();
+        return Optional.ofNullable(locales.get(localeId)).map(StringEscapeUtils::unescapeJava);
     }
 
     /**
-     * Returns an un-formatted locale loaded from the locales file, with replacements applied
+     * Returns a raw, un-formatted locale loaded from the locales file, with replacements applied
+     * <p>
+     * Note that replacements will not be MineDown-escaped; use {@link #escapeText(String)} to escape replacements
      *
      * @param localeId     String identifier of the locale, corresponding to a key in the file
      * @param replacements Ordered array of replacement strings to fill in placeholders with
@@ -65,18 +86,32 @@ public class Locales {
      * @return An {@link Optional} containing the formatted locale corresponding to the id, if it exists
      */
     public Optional<MineDown> getLocale(@NotNull String localeId) {
-        return getRawLocale(localeId).map(MineDown::new);
+        return getRawLocale(localeId).map(this::format);
     }
 
     /**
      * Returns a MineDown-formatted locale from the locales file, with replacements applied
+     * <p>
+     * Note that replacements will be MineDown-escaped before application
      *
      * @param localeId     String identifier of the locale, corresponding to a key in the file
      * @param replacements Ordered array of replacement strings to fill in placeholders with
      * @return An {@link Optional} containing the replacement-applied, formatted locale corresponding to the id, if it exists
      */
     public Optional<MineDown> getLocale(@NotNull String localeId, @NotNull String... replacements) {
-        return getRawLocale(localeId, replacements).map(MineDown::new);
+        return getRawLocale(localeId, Arrays.stream(replacements).map(Locales::escapeText)
+                .toArray(String[]::new)).map(this::format);
+    }
+
+    /**
+     * Returns a MineDown-formatted string
+     *
+     * @param text The text to format
+     * @return A {@link MineDown} object containing the formatted text
+     */
+    @NotNull
+    public MineDown format(@NotNull String text) {
+        return new MineDown(text);
     }
 
     /**
@@ -86,54 +121,95 @@ public class Locales {
      * @param replacements Ordered array of replacement strings to fill in placeholders with
      * @return the raw locale, with inserted placeholders
      */
+    @NotNull
     private String applyReplacements(@NotNull String rawLocale, @NotNull String... replacements) {
         int replacementIndexer = 1;
         for (String replacement : replacements) {
             String replacementString = "%" + replacementIndexer + "%";
             rawLocale = rawLocale.replace(replacementString, replacement);
-            replacementIndexer = replacementIndexer + 1;
+            replacementIndexer += 1;
         }
         return rawLocale;
     }
 
     /**
-     * Load the locales from a BoostedYaml {@link YamlDocument} locales file
+     * Escape a string from {@link MineDown} formatting for use in a MineDown-formatted locale
      *
-     * @param localesConfig The loaded {@link YamlDocument} locales.yml file
-     * @return the loaded {@link Locales}
+     * @param string The string to escape
+     * @return The escaped string
      */
-    public static Locales load(@NotNull YamlDocument localesConfig) {
-        return new Locales(localesConfig);
+    @NotNull
+    public static String escapeText(@NotNull String string) {
+        final StringBuilder value = new StringBuilder();
+        for (int i = 0; i < string.length(); ++i) {
+            char c = string.charAt(i);
+            boolean isEscape = c == '\\';
+            boolean isColorCode = i + 1 < string.length() && (c == 167 || c == '&');
+            boolean isEvent = c == '[' || c == ']' || c == '(' || c == ')';
+            if (isEscape || isColorCode || isEvent) {
+                value.append('\\');
+            }
+
+            value.append(c);
+        }
+        return value.toString();
     }
 
     /**
-     * Strips a string of basic MineDown formatting, used for displaying plugin info to console
+     * Returns the base list options to use for a paginated chat list
      *
-     * @param string The string to strip
-     * @return The MineDown-stripped string
+     * @param itemsPerPage The number of items to display per page
+     * @return The list options
      */
-    public String stripMineDown(@NotNull String string) {
-        final String[] in = string.split("\n");
-        final StringBuilder out = new StringBuilder();
-        String regex = "[^\\[\\]() ]*\\[([^()]+)]\\([^()]+open_url=(\\S+).*\\)";
-
-        for (int i = 0; i < in.length; i++) {
-            Pattern pattern = Pattern.compile(regex);
-            Matcher m = pattern.matcher(in[i]);
-
-            if (m.find()) {
-                out.append(in[i].replace(m.group(0), ""));
-                out.append(m.group(2));
-            } else {
-                out.append(in[i]);
-            }
-
-            if (i + 1 != in.length) {
-                out.append("\n");
-            }
-        }
-
-        return out.toString();
+    @NotNull
+    public ListOptions.Builder getBaseChatList(int itemsPerPage) {
+        return new ListOptions.Builder()
+                .setFooterFormat(getRawLocale("list_footer",
+                        "%previous_page_button%", "%current_page%",
+                        "%total_pages%", "%next_page_button%", "%page_jumpers%").orElse(""))
+                .setNextButtonFormat(getRawLocale("list_next_page_button",
+                        "%next_page_index%", "%command%").orElse(""))
+                .setPreviousButtonFormat(getRawLocale("list_previous_page_button",
+                        "%previous_page_index%", "%command%").orElse(""))
+                .setPageJumpersFormat(getRawLocale("list_page_jumpers",
+                        "%page_jump_buttons%").orElse(""))
+                .setPageJumperPageFormat(getRawLocale("list_page_jumper_button",
+                        "%target_page_index%", "%command%").orElse(""))
+                .setPageJumperCurrentPageFormat(getRawLocale("list_page_jumper_current_page",
+                        "%current_page%").orElse(""))
+                .setPageJumperPageSeparator(getRawLocale("list_page_jumper_separator").orElse(""))
+                .setPageJumperGroupSeparator(getRawLocale("list_page_jumper_group_separator").orElse(""))
+                .setItemsPerPage(itemsPerPage)
+                .setEscapeItemsMineDown(false)
+                .setSpaceAfterHeader(false)
+                .setSpaceBeforeFooter(false);
     }
 
+    /**
+     * Determines the slot a system notification should be displayed in
+     */
+    public enum NotificationSlot {
+        /**
+         * Displays the notification in the action bar
+         */
+        ACTION_BAR,
+
+        /**
+         * Displays the notification in the chat
+         */
+        CHAT,
+
+        /**
+         * Displays the notification in an Advancement Toast
+         *
+         * @deprecated No longer supported
+         */
+        @Deprecated(since = "3.6.7")
+        TOAST,
+
+        /**
+         * Does not display the notification
+         */
+        NONE
+    }
 }

common/src/main/java/net/william278/husksync/config/Server.java

@@ -0,0 +1,72 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.config;
+
+import de.exlll.configlib.Configuration;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
+import org.jetbrains.annotations.NotNull;
+
+import java.nio.file.Path;
+
+@Configuration
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class Server {
+
+    static final String CONFIG_HEADER = """
+            ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+            ┃     HuskSync - Server ID     ┃
+            ┃    Developed by William278   ┃
+            ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+            ┣╸ This file should contain the ID of this server as defined in your proxy config.
+            ┗╸ If you join it using /server alpha, then set it to 'alpha' (case-sensitive)""";
+
+    private String name = getDefault();
+
+    @NotNull
+    public static Server of(@NotNull String name) {
+        return new Server(name);
+    }
+
+    /**
+     * Find a sensible default name for the server name property
+     */
+    @NotNull
+    private static String getDefault() {
+        final String serverFolder = System.getProperty("user.dir");
+        return serverFolder == null ? "server" : Path.of(serverFolder).getFileName().toString().trim();
+    }
+
+    @Override
+    public boolean equals(@NotNull Object other) {
+        // If the name of this server matches another, the servers are the same.
+        if (other instanceof Server server) {
+            return server.getName().equalsIgnoreCase(this.getName());
+        }
+        return super.equals(other);
+    }
+  
+    public String getName() {
+        final String envServerName = System.getenv("HUSKSYNC_SERVER_NAME");
+        return envServerName == null ? name : envServerName;
+    }
+}

common/src/main/java/net/william278/husksync/config/Settings.java

@@ -1,273 +1,394 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
 package net.william278.husksync.config;
 
-import dev.dejvokep.boostedyaml.YamlDocument;
+import com.google.common.collect.Lists;
+import de.exlll.configlib.Comment;
+import de.exlll.configlib.Configuration;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import net.william278.husksync.command.PluginCommand;
+import net.william278.husksync.data.DataSnapshot;
+import net.william278.husksync.data.Identifier;
+import net.william278.husksync.database.Database;
+import net.william278.husksync.listener.EventListener;
+import net.william278.husksync.sync.DataSyncer;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
 import java.util.List;
+import java.util.Locale;
+import java.util.Map;
 
 /**
- * Settings used for the plugin, as read from the config file
+ * Plugin settings, read from config.yml
  */
+@SuppressWarnings("FieldMayBeFinal")
+@Getter
+@Configuration
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class Settings {
 
-    /**
-     * Map of {@link ConfigOption}s read from the config file
-     */
-    private final HashMap<ConfigOption, Object> configOptions;
+    protected static final String CONFIG_HEADER = """
+            ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+            ┃        HuskSync Config       ┃
+            ┃    Developed by William278   ┃
+            ┣━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+            ┣╸ Information: https://william278.net/project/husksync
+            ┣╸ Config Help: https://william278.net/docs/husksync/config-file/
+            ┗╸ Documentation: https://william278.net/docs/husksync""";
 
-    // Load the settings from the document
-    private Settings(@NotNull YamlDocument config) {
-        this.configOptions = new HashMap<>();
-        Arrays.stream(ConfigOption.values()).forEach(configOption -> configOptions
-                .put(configOption, switch (configOption.optionType) {
-                    case BOOLEAN -> configOption.getBooleanValue(config);
-                    case STRING -> configOption.getStringValue(config);
-                    case DOUBLE -> configOption.getDoubleValue(config);
-                    case FLOAT -> configOption.getFloatValue(config);
-                    case INTEGER -> configOption.getIntValue(config);
-                    case STRING_LIST -> configOption.getStringListValue(config);
-                }));
-    }
+    // Top-level settings
+    @Comment({"Locale of the default language file to use.", "Docs: https://william278.net/docs/husksync/translations"})
+    private String language = Locales.DEFAULT_LOCALE;
 
-    /**
-     * Get the value of the specified {@link ConfigOption}
-     *
-     * @param option the {@link ConfigOption} to check
-     * @return the value of the {@link ConfigOption} as a boolean
-     * @throws ClassCastException if the option is not a boolean
-     */
-    public boolean getBooleanValue(@NotNull ConfigOption option) throws ClassCastException {
-        return (Boolean) configOptions.get(option);
-    }
+    @Comment("Whether to automatically check for plugin updates on startup")
+    private boolean checkForUpdates = true;
 
-    /**
-     * Get the value of the specified {@link ConfigOption}
-     *
-     * @param option the {@link ConfigOption} to check
-     * @return the value of the {@link ConfigOption} as a string
-     * @throws ClassCastException if the option is not a string
-     */
-    public String getStringValue(@NotNull ConfigOption option) throws ClassCastException {
-        return (String) configOptions.get(option);
-    }
+    @Comment("Specify a common ID for grouping servers running HuskSync. "
+             + "Don't modify this unless you know what you're doing!")
+    private String clusterId = "";
 
-    /**
-     * Get the value of the specified {@link ConfigOption}
-     *
-     * @param option the {@link ConfigOption} to check
-     * @return the value of the {@link ConfigOption} as a double
-     * @throws ClassCastException if the option is not a double
-     */
-    public double getDoubleValue(@NotNull ConfigOption option) throws ClassCastException {
-        return (Double) configOptions.get(option);
-    }
+    @Comment("Enable development debug logging")
+    private boolean debugLogging = false;
 
-    /**
-     * Get the value of the specified {@link ConfigOption}
-     *
-     * @param option the {@link ConfigOption} to check
-     * @return the value of the {@link ConfigOption} as a float
-     * @throws ClassCastException if the option is not a float
-     */
-    public double getFloatValue(@NotNull ConfigOption option) throws ClassCastException {
-        return (Float) configOptions.get(option);
-    }
+    @Comment({"Whether to enable the Player Analytics hook.", "Docs: https://william278.net/docs/husksync/plan-hook"})
+    private boolean enablePlanHook = true;
 
-    /**
-     * Get the value of the specified {@link ConfigOption}
-     *
-     * @param option the {@link ConfigOption} to check
-     * @return the value of the {@link ConfigOption} as an integer
-     * @throws ClassCastException if the option is not an integer
-     */
-    public int getIntegerValue(@NotNull ConfigOption option) throws ClassCastException {
-        return (Integer) configOptions.get(option);
-    }
+    @Comment("Whether to cancel game event packets directly when handling locked players if ProtocolLib or PacketEvents is installed")
+    private boolean cancelPackets = true;
 
-    /**
-     * Get the value of the specified {@link ConfigOption}
-     *
-     * @param option the {@link ConfigOption} to check
-     * @return the value of the {@link ConfigOption} as a string {@link List}
-     * @throws ClassCastException if the option is not a string list
-     */
-    @SuppressWarnings("unchecked")
-    public List<String> getStringListValue(@NotNull ConfigOption option) throws ClassCastException {
-        return (List<String>) configOptions.get(option);
-    }
+    @Comment("Add HuskSync commands to this list to prevent them from being registered (e.g. ['userdata'])")
+    @Getter(AccessLevel.NONE)
+    private List<String> disabledCommands = Lists.newArrayList();
 
+    // Database settings
+    @Comment("Database settings")
+    private DatabaseSettings database = new DatabaseSettings();
 
-    /**
-     * Load the settings from a BoostedYaml {@link YamlDocument} config file
-     *
-     * @param config The loaded {@link YamlDocument} config.yml file
-     * @return the loaded {@link Settings}
-     */
-    public static Settings load(@NotNull YamlDocument config) {
-        return new Settings(config);
-    }
+    @Getter
+    @Configuration
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class DatabaseSettings {
 
-    /**
-     * Represents an option stored by a path in config.yml
-     */
-    public enum ConfigOption {
-        LANGUAGE("language", OptionType.STRING, "en-gb"),
-        CHECK_FOR_UPDATES("check_for_updates", OptionType.BOOLEAN, true),
+        @Comment("Type of database to use (MYSQL, MARIADB, POSTGRES, MONGO)")
+        private Database.Type type = Database.Type.MYSQL;
 
-        CLUSTER_ID("cluster_id", OptionType.STRING, ""),
-        DEBUG_LOGGING("debug_logging", OptionType.BOOLEAN, false),
+        @Comment("Specify credentials here for your MYSQL, MARIADB, POSTGRES OR MONGO database")
+        private DatabaseCredentials credentials = new DatabaseCredentials();
 
-        DATABASE_HOST("database.credentials.host", OptionType.STRING, "localhost"),
-        DATABASE_PORT("database.credentials.port", OptionType.INTEGER, 3306),
-        DATABASE_NAME("database.credentials.database", OptionType.STRING, "HuskSync"),
-        DATABASE_USERNAME("database.credentials.username", OptionType.STRING, "root"),
-        DATABASE_PASSWORD("database.credentials.password", OptionType.STRING, "pa55w0rd"),
-        DATABASE_CONNECTION_PARAMS("database.credentials.params", OptionType.STRING, "?autoReconnect=true&useSSL=false"),
-        DATABASE_CONNECTION_POOL_MAX_SIZE("database.connection_pool.maximum_pool_size", OptionType.INTEGER, 10),
-        DATABASE_CONNECTION_POOL_MIN_IDLE("database.connection_pool.minimum_idle", OptionType.INTEGER, 10),
-        DATABASE_CONNECTION_POOL_MAX_LIFETIME("database.connection_pool.maximum_lifetime", OptionType.INTEGER, 1800000),
-        DATABASE_CONNECTION_POOL_KEEPALIVE("database.connection_pool.keepalive_time", OptionType.INTEGER, 0),
-        DATABASE_CONNECTION_POOL_TIMEOUT("database.connection_pool.connection_timeout", OptionType.INTEGER, 5000),
-        DATABASE_USERS_TABLE_NAME("database.table_names.users_table", OptionType.STRING, "husksync_users"),
-        DATABASE_USER_DATA_TABLE_NAME("database.table_names.user_data_table", OptionType.STRING, "husksync_user_data"),
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class DatabaseCredentials {
+            private String host = "localhost";
+            private int port = 3306;
+            private String database = "HuskSync";
+            private String username = "root";
+            private String password = "pa55w0rd";
+            @Comment("Only change this if you're using MARIADB or POSTGRES")
+            private String parameters = String.join("&",
+                    "?autoReconnect=true", "useSSL=false",
+                    "useUnicode=true", "characterEncoding=UTF-8");
+        }
 
-        REDIS_HOST("redis.credentials.host", OptionType.STRING, "localhost"),
-        REDIS_PORT("redis.credentials.port", OptionType.INTEGER, 6379),
-        REDIS_PASSWORD("redis.credentials.password", OptionType.STRING, ""),
-        REDIS_USE_SSL("redis.use_ssl", OptionType.BOOLEAN, false),
+        @Comment("MYSQL, MARIADB, POSTGRES database Hikari connection pool properties. Don't modify this unless you know what you're doing!")
+        private PoolSettings connectionPool = new PoolSettings();
 
-        SYNCHRONIZATION_MAX_USER_DATA_SNAPSHOTS("synchronization.max_user_data_snapshots", OptionType.INTEGER, 5),
-        SYNCHRONIZATION_SAVE_ON_WORLD_SAVE("synchronization.save_on_world_save", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_COMPRESS_DATA("synchronization.compress_data", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_NETWORK_LATENCY_MILLISECONDS("synchronization.network_latency_milliseconds", OptionType.INTEGER, 500),
-        SYNCHRONIZATION_SYNC_INVENTORIES("synchronization.features.inventories", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_ENDER_CHESTS("synchronization.features.ender_chests", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_HEALTH("synchronization.features.health", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_MAX_HEALTH("synchronization.features.max_health", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_HUNGER("synchronization.features.hunger", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_EXPERIENCE("synchronization.features.experience", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_POTION_EFFECTS("synchronization.features.potion_effects", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_ADVANCEMENTS("synchronization.features.advancements", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_GAME_MODE("synchronization.features.game_mode", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_STATISTICS("synchronization.features.statistics", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_PERSISTENT_DATA_CONTAINER("synchronization.features.persistent_data_container", OptionType.BOOLEAN, true),
-        SYNCHRONIZATION_SYNC_LOCATION("synchronization.features.location", OptionType.BOOLEAN, true);
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class PoolSettings {
+            private int maximumPoolSize = 10;
+            private int minimumIdle = 10;
+            private long maximumLifetime = 1800000;
+            private long keepaliveTime = 0;
+            private long connectionTimeout = 5000;
+        }
+
+        @Comment("Advanced MongoDB settings. Don't modify unless you know what you're doing!")
+        private MongoSettings mongoSettings = new MongoSettings();
+
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class MongoSettings {
+            private boolean usingAtlas = false;
+            private String parameters = String.join("&",
+                    "?retryWrites=true", "w=majority",
+                    "authSource=HuskSync");
+        }
+
+        @Comment("Names of tables to use on your database. Don't modify this unless you know what you're doing!")
+        @Getter(AccessLevel.NONE)
+        private Map<String, String> tableNames = Database.TableName.getDefaults();
+
+        @Comment("Whether to run the creation SQL on the database when the server starts. Don't modify this unless you know what you're doing!")
+        private boolean createTables = true;
 
-        /**
-         * The path in the config.yml file to the value
-         */
         @NotNull
-        public final String configPath;
-
-        /**
-         * The {@link OptionType} of this option
-         */
-        @NotNull
-        public final OptionType optionType;
-
-        /**
-         * The default value of this option if not set in config
-         */
-        @Nullable
-        private final Object defaultValue;
-
-        ConfigOption(@NotNull String configPath, @NotNull OptionType optionType, @Nullable Object defaultValue) {
-            this.configPath = configPath;
-            this.optionType = optionType;
-            this.defaultValue = defaultValue;
-        }
-
-        ConfigOption(@NotNull String configPath, @NotNull OptionType optionType) {
-            this.configPath = configPath;
-            this.optionType = optionType;
-            this.defaultValue = null;
-        }
-
-        /**
-         * Get the value at the path specified (or return default if set), as a string
-         *
-         * @param config The {@link YamlDocument} config file
-         * @return the value defined in the config, as a string
-         */
-        public String getStringValue(@NotNull YamlDocument config) {
-            return defaultValue != null
-                    ? config.getString(configPath, (String) defaultValue)
-                    : config.getString(configPath);
-        }
-
-        /**
-         * Get the value at the path specified (or return default if set), as a boolean
-         *
-         * @param config The {@link YamlDocument} config file
-         * @return the value defined in the config, as a boolean
-         */
-        public boolean getBooleanValue(@NotNull YamlDocument config) {
-            return defaultValue != null
-                    ? config.getBoolean(configPath, (Boolean) defaultValue)
-                    : config.getBoolean(configPath);
-        }
-
-        /**
-         * Get the value at the path specified (or return default if set), as a double
-         *
-         * @param config The {@link YamlDocument} config file
-         * @return the value defined in the config, as a double
-         */
-        public double getDoubleValue(@NotNull YamlDocument config) {
-            return defaultValue != null
-                    ? config.getDouble(configPath, (Double) defaultValue)
-                    : config.getDouble(configPath);
-        }
-
-        /**
-         * Get the value at the path specified (or return default if set), as a float
-         *
-         * @param config The {@link YamlDocument} config file
-         * @return the value defined in the config, as a float
-         */
-        public float getFloatValue(@NotNull YamlDocument config) {
-            return defaultValue != null
-                    ? config.getFloat(configPath, (Float) defaultValue)
-                    : config.getFloat(configPath);
-        }
-
-        /**
-         * Get the value at the path specified (or return default if set), as an int
-         *
-         * @param config The {@link YamlDocument} config file
-         * @return the value defined in the config, as an int
-         */
-        public int getIntValue(@NotNull YamlDocument config) {
-            return defaultValue != null
-                    ? config.getInt(configPath, (Integer) defaultValue)
-                    : config.getInt(configPath);
-        }
-
-        /**
-         * Get the value at the path specified (or return default if set), as a string {@link List}
-         *
-         * @param config The {@link YamlDocument} config file
-         * @return the value defined in the config, as a string {@link List}
-         */
-        public List<String> getStringListValue(@NotNull YamlDocument config) {
-            return config.getStringList(configPath, new ArrayList<>());
-        }
-
-        /**
-         * Represents the type of the object
-         */
-        public enum OptionType {
-            BOOLEAN,
-            STRING,
-            DOUBLE,
-            FLOAT,
-            INTEGER,
-            STRING_LIST
+        public String getTableName(@NotNull Database.TableName tableName) {
+            return tableNames.getOrDefault(tableName.name().toLowerCase(Locale.ENGLISH), tableName.getDefaultName());
         }
     }
 
+    // Redis settings
+    @Comment("Redis settings")
+    private RedisSettings redis = new RedisSettings();
+
+    @Getter
+    @Configuration
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class RedisSettings {
+
+        @Comment({"Specify the credentials of your Redis server here.",
+                "Set \"user\" to '' if you don't have one or would like to use the default user.",
+                "Set \"password\" to '' if you don't have one."})
+        private RedisCredentials credentials = new RedisCredentials();
+
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class RedisCredentials {
+            private String host = "localhost";
+            private int port = 6379;
+            @Comment("Only change the database if you know what you are doing. The default is 0.")
+            private int database = 0;
+            private String user = "";
+            private String password = "";
+
+            @Comment("Use SSL/TLS for encrypted connections.")
+            private boolean useSsl = false;
+
+            @Comment("Connection timeout in milliseconds.")
+            private int connectionTimeout = 2000;
+
+            @Comment("Socket (read/write) timeout in milliseconds.")
+            private int socketTimeout = 2000;
+
+            @Comment("Max number of connections in the pool.")
+            private int maxTotalConnections = 50;
+
+            @Comment("Max number of idle connections in the pool.")
+            private int maxIdleConnections = 8;
+
+            @Comment("Min number of idle connections in the pool.")
+            private int minIdleConnections = 2;
+
+            @Comment("Enable health checks when borrowing connections from the pool.")
+            private boolean testOnBorrow = true;
+
+            @Comment("Enable health checks when returning connections to the pool.")
+            private boolean testOnReturn = true;
+
+            @Comment("Enable periodic idle connection health checks.")
+            private boolean testWhileIdle = true;
+
+            @Comment("Min evictable idle time (ms) before a connection is eligible for eviction.")
+            private long minEvictableIdleTimeMillis = 60000;
+
+            @Comment("Time (ms) between eviction runs.")
+            private long timeBetweenEvictionRunsMillis = 30000;
+
+            @Comment("Number of retries for commands when connection fails.")
+            private int maxRetries = 3;
+
+            @Comment("Base backoff time in ms for retries (exponential backoff multiplier).")
+            private int retryBackoffMillis = 200;
+        }
+
+        @Comment("Options for if you're using Redis sentinel. Don't modify this unless you know what you're doing!")
+        private RedisSentinel sentinel = new RedisSentinel();
+
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class RedisSentinel {
+            @Comment("The master set name for the Redis sentinel.")
+            private String master = "";
+            @Comment("List of host:port pairs")
+            private List<String> nodes = Lists.newArrayList();
+            private String password = "";
+        }
+
+    }
+
+    // Synchronization settings
+    @Comment("Data syncing settings")
+    private SynchronizationSettings synchronization = new SynchronizationSettings();
+
+    @Getter
+    @Configuration
+    @NoArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class SynchronizationSettings {
+
+        @Comment({"The data synchronization mode to use (LOCKSTEP or DELAY). LOCKSTEP is recommended for most networks.",
+                "Docs: https://william278.net/docs/husksync/sync-modes"})
+        private DataSyncer.Mode mode = DataSyncer.Mode.LOCKSTEP;
+
+        @Comment("The number of data snapshot backups that should be kept at once per user")
+        private int maxUserDataSnapshots = 16;
+
+        @Comment("Number of hours between new snapshots being saved as backups (Use \"0\" to backup all snapshots)")
+        private int snapshotBackupFrequency = 4;
+
+        @Comment({"List of save cause IDs for which a snapshot will be automatically pinned (so it won't be rotated).",
+                "Docs: https://william278.net/docs/husksync/data-rotation#save-causes"})
+        @Getter(AccessLevel.NONE)
+        private List<String> autoPinnedSaveCauses = List.of(
+                DataSnapshot.SaveCause.INVENTORY_COMMAND.name(),
+                DataSnapshot.SaveCause.ENDERCHEST_COMMAND.name(),
+                DataSnapshot.SaveCause.BACKUP_RESTORE.name(),
+                DataSnapshot.SaveCause.LEGACY_MIGRATION.name(),
+                DataSnapshot.SaveCause.MPDB_MIGRATION.name()
+        );
+
+        @Comment("Whether to create a snapshot for users on a world when the server saves that world")
+        private boolean saveOnWorldSave = true;
+
+        @Comment("Configuration for how and when to sync player data when they die")
+        private SaveOnDeathSettings saveOnDeath = new SaveOnDeathSettings();
+
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class SaveOnDeathSettings {
+            @Comment("Whether to create a snapshot for users when they die (containing their death drops)")
+            private boolean enabled = false;
+
+            @Comment("What items to save in death snapshots? (DROPS or ITEMS_TO_KEEP). "
+                     + "Note that ITEMS_TO_KEEP (suggested for keepInventory servers) requires a Paper 1.19.4+ server.")
+            private DeathItemsMode itemsToSave = DeathItemsMode.DROPS;
+
+            @Comment("Should a death snapshot still be created even if the items to save on the player's death are empty?")
+            private boolean saveEmptyItems = true;
+
+            @Comment("Whether dead players who log out and log in to a different server should have their items saved.")
+            private boolean syncDeadPlayersChangingServer = true;
+
+            /**
+             * Represents the mode of saving items on death
+             */
+            public enum DeathItemsMode {
+                DROPS,
+                ITEMS_TO_KEEP
+            }
+        }
+
+        @Comment("Whether to use the snappy data compression algorithm. Keep on unless you know what you're doing")
+        private boolean compressData = true;
+
+        @Comment("Where to display sync notifications (ACTION_BAR, CHAT or NONE)")
+        private Locales.NotificationSlot notificationDisplaySlot = Locales.NotificationSlot.ACTION_BAR;
+
+        @Comment("Persist maps locked in a Cartography Table to let them be viewed on any server")
+        private boolean persistLockedMaps = true;
+
+        @Comment("If using the DELAY sync method, how long should this server listen for Redis key data updates before "
+                 + "pulling data from the database instead (i.e., if the user did not change servers).")
+        private int networkLatencyMilliseconds = 500;
+
+        @Comment({"Which data types to synchronize.", "Docs: https://william278.net/docs/husksync/sync-features"})
+        @Getter(AccessLevel.NONE)
+        private Map<String, Boolean> features = Identifier.getConfigMap();
+
+        @Comment("Commands which should be blocked before a player has finished syncing (Use * to block all commands)")
+        private List<String> blacklistedCommandsWhileLocked = new ArrayList<>(List.of("*"));
+
+        @Comment("Configuration for how to sync attributes")
+        private AttributeSettings attributes = new AttributeSettings();
+
+        @Getter
+        @Configuration
+        @NoArgsConstructor(access = AccessLevel.PRIVATE)
+        public static class AttributeSettings {
+
+            @Comment({"Which attribute types should be saved as part of attribute syncing. Supports wildcard matching.",
+                    "(e.g. ['minecraft:generic.max_health', 'minecraft:generic.*'])"})
+            @Getter(AccessLevel.NONE)
+            private List<String> syncedAttributes = new ArrayList<>(List.of(
+                    "minecraft:generic.max_health", "minecraft:max_health",
+                    "minecraft:generic.max_absorption", "minecraft:max_absorption",
+                    "minecraft:generic.luck", "minecraft:luck",
+                    "minecraft:generic.scale", "minecraft:scale",
+                    "minecraft:generic.step_height", "minecraft:step_height",
+                    "minecraft:generic.gravity", "minecraft:gravity"
+            ));
+
+            @Comment({"Which attribute modifiers should be saved. Supports wildcard matching.",
+                    "(e.g. ['minecraft:effect.speed', 'minecraft:effect.*'])"})
+            @Getter(AccessLevel.NONE)
+            private List<String> ignoredModifiers = new ArrayList<>(List.of(
+                    "minecraft:effect.*", "minecraft:creative_mode_*"
+            ));
+
+            private boolean matchesWildcard(@NotNull String pat, @NotNull String value) {
+                if (!pat.contains(":")) {
+                    pat = "minecraft:%s".formatted(pat);
+                }
+                if (!value.contains(":")) {
+                    value = "minecraft:%s".formatted(value);
+                }
+                return pat.contains("*") ? value.matches(pat.replace("*", ".*")) : pat.equals(value);
+            }
+
+            public boolean isIgnoredAttribute(@NotNull String attribute) {
+                return syncedAttributes.stream().noneMatch(wildcard -> matchesWildcard(wildcard, attribute));
+            }
+
+            public boolean isIgnoredModifier(@NotNull String modifier) {
+                return ignoredModifiers.stream().anyMatch(wildcard -> matchesWildcard(wildcard, modifier));
+            }
+
+        }
+
+        @Comment("Event priorities for listeners (HIGHEST, NORMAL, LOWEST). Change if you encounter plugin conflicts")
+        @Getter(AccessLevel.NONE)
+        private Map<String, String> eventPriorities = EventListener.ListenerType.getDefaults();
+
+        @Comment("Enable check-in petitions for data syncing (don't change this unless you know what you're doing)")
+        private boolean checkinPetitions = false;
+
+        public boolean doAutoPin(@NotNull DataSnapshot.SaveCause cause) {
+            return autoPinnedSaveCauses.contains(cause.name());
+        }
+
+        public boolean isFeatureEnabled(@NotNull Identifier id) {
+            return id.isCustom() || features.getOrDefault(id.getKeyValue(), id.isEnabledByDefault());
+        }
+
+        @NotNull
+        public EventListener.Priority getEventPriority(@NotNull EventListener.ListenerType type) {
+            try {
+                return EventListener.Priority.valueOf(eventPriorities.get(type.name().toLowerCase(Locale.ENGLISH)));
+            } catch (IllegalArgumentException e) {
+                return EventListener.Priority.NORMAL;
+            }
+        }
+    }
+
+    public boolean isCommandDisabled(@NotNull PluginCommand command) {
+        return disabledCommands.stream().map(c -> c.startsWith("/") ? c.substring(1) : c)
+                .anyMatch(c -> c.equalsIgnoreCase(command.getName()) || command.getAliases().contains(c));
+    }
+
+
 }

common/src/main/java/net/william278/husksync/data/AdvancementData.java

@@ -1,34 +0,0 @@
-package net.william278.husksync.data;
-
-import com.google.gson.annotations.SerializedName;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Date;
-import java.util.Map;
-
-/**
- * A mapped piece of advancement data
- */
-public class AdvancementData {
-
-    /**
-     * The advancement namespaced key
-     */
-    @SerializedName("key")
-    public String key;
-
-    /**
-     * A map of completed advancement criteria to when it was completed
-     */
-    @SerializedName("completed_criteria")
-    public Map<String, Date> completedCriteria;
-
-    public AdvancementData(@NotNull String key, @NotNull Map<String, Date> awardedCriteria) {
-        this.key = key;
-        this.completedCriteria = awardedCriteria;
-    }
-
-    @SuppressWarnings("unused")
-    protected AdvancementData() {
-    }
-}

common/src/main/java/net/william278/husksync/data/CompressedDataAdapter.java

@@ -1,27 +0,0 @@
-package net.william278.husksync.data;
-
-import org.jetbrains.annotations.NotNull;
-import org.xerial.snappy.Snappy;
-
-import java.io.IOException;
-
-public class CompressedDataAdapter extends JsonDataAdapter {
-
-    @Override
-    public byte[] toBytes(@NotNull UserData data) throws DataAdaptionException {
-        try {
-            return Snappy.compress(super.toBytes(data));
-        } catch (IOException e) {
-            throw new DataAdaptionException("Failed to compress data", e);
-        }
-    }
-
-    @Override
-    public @NotNull UserData fromBytes(byte[] data) throws DataAdaptionException {
-        try {
-            return super.fromBytes(Snappy.uncompress(data));
-        } catch (IOException e) {
-            throw new DataAdaptionException("Failed to decompress data", e);
-        }
-    }
-}

common/src/main/java/net/william278/husksync/data/Data.java

@@ -0,0 +1,558 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.data;
+
+import com.google.common.collect.Sets;
+import com.google.gson.annotations.SerializedName;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import lombok.experimental.Accessors;
+import net.kyori.adventure.key.Key;
+import net.william278.husksync.HuskSync;
+import net.william278.husksync.user.OnlineUser;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+import java.util.stream.Collectors;
+
+/**
+ * A piece of data, held by a {@link DataHolder}
+ */
+@SuppressWarnings("unused")
+public interface Data {
+
+    /**
+     * Apply (set) this data container to the given {@link OnlineUser}
+     *
+     * @param user   the user to apply this element to
+     * @param plugin the plugin instance
+     */
+    void apply(@NotNull UserDataHolder user, @NotNull HuskSync plugin);
+
+    /**
+     * A data container holding data for:
+     * <ul>
+     *     <li>Inventories</li>
+     *     <li>Ender Chests</li>
+     * </ul>
+     */
+    interface Items extends Data {
+
+        @Nullable
+        Stack @NotNull [] getStack();
+
+        default int getSlotCount() {
+            return getStack().length;
+        }
+
+        record Stack(@NotNull String material, int amount, @Nullable String name,
+                     @Nullable List<String> lore, @NotNull List<String> enchantments) {
+
+        }
+
+        default boolean isEmpty() {
+            return Arrays.stream(getStack()).allMatch(Objects::isNull) || getStack().length == 0;
+        }
+
+        void clear();
+
+        void setContents(@NotNull Items contents);
+
+        /**
+         * A data container holding data for inventories and selected hotbar slot
+         */
+        interface Inventory extends Items {
+
+            int INVENTORY_SLOT_COUNT = 41;
+            String ITEMS_TAG = "items";
+            String HELD_ITEM_SLOT_TAG = "held_item_slot";
+
+            int getHeldItemSlot();
+
+            void setHeldItemSlot(int heldItemSlot) throws IllegalArgumentException;
+
+            default Optional<Stack> getHelmet() {
+                return Optional.ofNullable(getStack()[39]);
+            }
+
+            default Optional<Stack> getChestplate() {
+                return Optional.ofNullable(getStack()[38]);
+            }
+
+            default Optional<Stack> getLeggings() {
+                return Optional.ofNullable(getStack()[37]);
+            }
+
+            default Optional<Stack> getBoots() {
+                return Optional.ofNullable(getStack()[36]);
+            }
+
+            default Optional<Stack> getOffHand() {
+                return Optional.ofNullable(getStack()[40]);
+            }
+        }
+
+        /**
+         * Data container holding data for ender chests
+         */
+        interface EnderChest extends Items {
+            int ENDER_CHEST_SLOT_COUNT = 27;
+        }
+
+    }
+
+    /**
+     * Data container holding data for potion effects
+     */
+    interface PotionEffects extends Data {
+
+        @NotNull
+        List<Effect> getActiveEffects();
+
+        /**
+         * Represents a potion effect
+         *
+         * @param type          the key of potion effect
+         * @param amplifier     the amplifier of the potion effect
+         * @param duration      the duration of the potion effect
+         * @param isAmbient     whether the potion effect is ambient
+         * @param showParticles whether the potion effect shows particles
+         * @param hasIcon       whether the potion effect displays a HUD icon
+         */
+        record Effect(@SerializedName("type") @NotNull String type,
+                      @SerializedName("amplifier") int amplifier,
+                      @SerializedName("duration") int duration,
+                      @SerializedName("is_ambient") boolean isAmbient,
+                      @SerializedName("show_particles") boolean showParticles,
+                      @SerializedName("has_icon") boolean hasIcon) {
+
+        }
+
+    }
+
+    /**
+     * Data container holding data for advancements
+     */
+    interface Advancements extends Data {
+
+        String RECIPE_ADVANCEMENT = "minecraft:recipe";
+
+        @NotNull
+        List<Advancement> getCompleted();
+
+        @NotNull
+        default List<Advancement> getCompletedExcludingRecipes() {
+            return getCompleted().stream().filter(adv -> !adv.getKey().startsWith(RECIPE_ADVANCEMENT)).toList();
+        }
+
+        void setCompleted(@NotNull List<Advancement> completed);
+
+        class Advancement {
+            @SerializedName("key")
+            private String key;
+
+            @SerializedName("completed_criteria")
+            private Map<String, Long> completedCriteria;
+
+            private Advancement(@NotNull String key, @NotNull Map<String, Date> completedCriteria) {
+                this.key = key;
+                this.completedCriteria = adaptDateMap(completedCriteria);
+            }
+
+            @SuppressWarnings("unused")
+            private Advancement() {
+            }
+
+            @NotNull
+            public static Advancement adapt(@NotNull String key, @NotNull Map<String, Date> completedCriteria) {
+                return new Advancement(key, completedCriteria);
+            }
+
+            @NotNull
+            private static Map<String, Long> adaptDateMap(@NotNull Map<String, Date> dateMap) {
+                return dateMap.entrySet().stream()
+                        .collect(Collectors.toMap(Map.Entry::getKey, e -> e.getValue().getTime()));
+            }
+
+            @NotNull
+            private static Map<String, Date> adaptLongMap(@NotNull Map<String, Long> dateMap) {
+                return dateMap.entrySet().stream()
+                        .collect(Collectors.toMap(Map.Entry::getKey, e -> new Date(e.getValue())));
+            }
+
+            @NotNull
+            public String getKey() {
+                return key;
+            }
+
+            public void setKey(@NotNull String key) {
+                this.key = key;
+            }
+
+            public Map<String, Date> getCompletedCriteria() {
+                return adaptLongMap(completedCriteria);
+            }
+
+            public void setCompletedCriteria(Map<String, Date> completedCriteria) {
+                this.completedCriteria = adaptDateMap(completedCriteria);
+            }
+        }
+
+    }
+
+    /**
+     * Data container holding data for the player's location
+     */
+    interface Location extends Data {
+        double getX();
+
+        void setX(double x);
+
+        double getY();
+
+        void setY(double y);
+
+        double getZ();
+
+        void setZ(double z);
+
+        float getYaw();
+
+        void setYaw(float yaw);
+
+        float getPitch();
+
+        void setPitch(float pitch);
+
+        @NotNull
+        World getWorld();
+
+        void setWorld(@NotNull World world);
+
+        record World(
+                @SerializedName("name") @NotNull String name,
+                @SerializedName("uuid") @NotNull UUID uuid,
+                @SerializedName("environment") @NotNull String environment
+        ) {
+        }
+    }
+
+    /**
+     * Data container holding data for statistics
+     */
+    interface Statistics extends Data {
+        @NotNull
+        Map<String, Integer> getGenericStatistics();
+
+        @NotNull
+        Map<String, Map<String, Integer>> getBlockStatistics();
+
+        @NotNull
+        Map<String, Map<String, Integer>> getItemStatistics();
+
+        @NotNull
+        Map<String, Map<String, Integer>> getEntityStatistics();
+    }
+
+    /**
+     * Data container holding data for persistent data containers
+     */
+    interface PersistentData extends Data {
+
+    }
+
+    /**
+     * A data container holding data for:
+     * <ul>
+     *     <li>Health</li>
+     *     <li>Max Health</li>
+     *     <li>Health Scale</li>
+     * </ul>
+     */
+    interface Health extends Data {
+        double getHealth();
+
+        void setHealth(double health);
+
+        /**
+         * @deprecated Use {@link Attributes#getMaxHealth()} instead
+         */
+        @Deprecated(forRemoval = true, since = "3.5")
+        default double getMaxHealth() {
+            return getHealth();
+        }
+
+        /**
+         * @deprecated Use {@link Attributes#setMaxHealth(double)} instead
+         */
+        @Deprecated(forRemoval = true, since = "3.5")
+        default void setMaxHealth(double maxHealth) {
+        }
+
+        double getHealthScale();
+
+        void setHealthScale(double healthScale);
+    }
+
+    /**
+     * A data container holding player attribute data
+     */
+    interface Attributes extends Data {
+
+        Key MAX_HEALTH_KEY = Key.key("generic.max_health");
+
+        List<Attribute> getAttributes();
+
+        record Attribute(
+                @NotNull String name,
+                double baseValue,
+                @NotNull Set<Modifier> modifiers
+        ) {
+
+            public double getValue() {
+                double value = baseValue;
+                for (Modifier modifier : modifiers) {
+                    value = modifier.modify(value);
+                }
+                return value;
+            }
+
+        }
+
+        @Getter
+        @Accessors(fluent = true)
+        @RequiredArgsConstructor
+        final class Modifier {
+            final static String ANY_EQUIPMENT_SLOT_GROUP = "any";
+
+            @Getter(AccessLevel.NONE)
+            @Nullable
+            @SerializedName("uuid")
+            private UUID uuid = null;
+
+            // Since 1.21.1: Name, amount, operation, slotGroup
+            @SerializedName("name")
+            private String name;
+
+            @SerializedName("amount")
+            private double amount;
+
+            @SerializedName("operation")
+            private int operation;
+
+            @SerializedName("equipment_slot")
+            @Deprecated(since = "3.7")
+            private int equipmentSlot;
+
+            @SerializedName("equipment_slot_group")
+            private String slotGroup = ANY_EQUIPMENT_SLOT_GROUP;
+
+            public Modifier(@NotNull String name, double amount, int operation, @NotNull String slotGroup) {
+                this.name = name;
+                this.amount = amount;
+                this.operation = operation;
+                this.slotGroup = slotGroup;
+            }
+
+            @Deprecated(since = "3.7")
+            public Modifier(@NotNull UUID uuid, @NotNull String name, double amount, int operation, int equipmentSlot) {
+                this.name = name;
+                this.amount = amount;
+                this.operation = operation;
+                this.equipmentSlot = equipmentSlot;
+            }
+
+            @Override
+            public boolean equals(Object obj) {
+                if (obj instanceof Modifier other) {
+                    if (uuid != null && other.uuid != null) {
+                        return uuid.equals(other.uuid);
+                    }
+                    return name.equals(other.name);
+                }
+                return super.equals(obj);
+            }
+
+            public double modify(double value) {
+                return switch (operation) {
+                    case 0 -> value + amount;
+                    case 1 -> value * amount;
+                    case 2 -> value * (1 + amount);
+                    default -> value;
+                };
+            }
+
+            public boolean hasUuid() {
+                return uuid != null;
+            }
+
+            @NotNull
+            public UUID uuid() {
+                return uuid != null ? uuid : UUID.nameUUIDFromBytes(name.getBytes());
+            }
+
+        }
+
+        default Optional<Attribute> getAttribute(@NotNull Key key) {
+            return getAttributes().stream()
+                    .filter(attribute -> attribute.name().equals(key.asString()))
+                    .findFirst();
+        }
+
+        default void removeAttribute(@NotNull Key key) {
+            getAttributes().removeIf(attribute -> attribute.name().equals(key.asString()));
+        }
+
+        default double getMaxHealth() {
+            return getAttribute(MAX_HEALTH_KEY)
+                    .map(Attribute::getValue)
+                    .orElse(20.0);
+        }
+
+        default void setMaxHealth(double maxHealth) {
+            removeAttribute(MAX_HEALTH_KEY);
+            getAttributes().add(new Attribute(MAX_HEALTH_KEY.asString(), maxHealth, Sets.newHashSet()));
+        }
+
+    }
+
+    /**
+     * A data container holding data for:
+     * <ul>
+     *
+     *     <li>Food Level</li>
+     *     <li>Saturation</li>
+     *     <li>Exhaustion</li>
+     * </ul>
+     */
+    interface Hunger extends Data {
+
+        int getFoodLevel();
+
+        void setFoodLevel(int foodLevel);
+
+        float getSaturation();
+
+        void setSaturation(float saturation);
+
+        float getExhaustion();
+
+        void setExhaustion(float exhaustion);
+
+    }
+
+    /**
+     * A data container holding data for:
+     * <ul>
+     *     <li>Total experience</li>
+     *     <li>Experience level</li>
+     *     <li>Experience progress</li>
+     * </ul>
+     */
+    interface Experience extends Data {
+
+        int getTotalExperience();
+
+        void setTotalExperience(int totalExperience);
+
+        int getExpLevel();
+
+        void setExpLevel(int expLevel);
+
+        float getExpProgress();
+
+        void setExpProgress(float expProgress);
+    }
+
+    /**
+     * Data container holding data for the player's current game mode
+     */
+    interface GameMode extends Data {
+
+        @NotNull
+        String getGameMode();
+
+        void setGameMode(@NotNull String gameMode);
+
+        /**
+         * Get if the player can fly.
+         *
+         * @return {@code false} since v3.5
+         * @deprecated Moved to its own data type. This will always return {@code false}.
+         * Use {@link FlightStatus#isAllowFlight()} instead
+         */
+        @Deprecated(forRemoval = true, since = "3.5")
+        default boolean getAllowFlight() {
+            return false;
+        }
+
+        /**
+         * Set if the player can fly.
+         *
+         * @deprecated Moved to its own data type.
+         * Use {@link FlightStatus#setAllowFlight(boolean)} instead
+         */
+        @Deprecated(forRemoval = true, since = "3.5")
+        default void setAllowFlight(boolean allowFlight) {
+        }
+
+        /**
+         * Get if the player is flying.
+         *
+         * @return {@code false} since v3.5
+         * @deprecated Moved to its own data type. This will always return {@code false}.
+         * Use {@link FlightStatus#isFlying()} instead
+         */
+        @Deprecated(forRemoval = true, since = "3.5")
+        default boolean getIsFlying() {
+            return false;
+        }
+
+        /**
+         * Set if the player is flying.
+         *
+         * @deprecated Moved to its own data type.
+         * Use {@link FlightStatus#setFlying(boolean)} instead
+         */
+        @Deprecated(forRemoval = true, since = "3.5")
+        default void setIsFlying(boolean isFlying) {
+        }
+
+    }
+
+    /**
+     * Data container holding data for the player's flight status
+     *
+     * @since 3.5
+     */
+    interface FlightStatus extends Data {
+        boolean isAllowFlight();
+
+        void setAllowFlight(boolean allowFlight);
+
+        boolean isFlying();
+
+        void setFlying(boolean isFlying);
+    }
+
+
+}

common/src/main/java/net/william278/husksync/data/DataAdapter.java

@@ -1,40 +0,0 @@
-package net.william278.husksync.data;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * An adapter that adapts {@link UserData} to and from a portable byte array.
- */
-public interface DataAdapter {
-
-    /**
-     * Converts {@link UserData} to a byte array
-     *
-     * @param data The {@link UserData} to adapt
-     * @return The byte array.
-     * @throws DataAdaptionException If an error occurred during adaptation.
-     */
-    byte[] toBytes(@NotNull UserData data) throws DataAdaptionException;
-
-    /**
-     * Serializes {@link UserData} to a JSON string.
-     *
-     * @param data   The {@link UserData} to serialize
-     * @param pretty Whether to pretty print the JSON.
-     * @return The output json string.
-     * @throws DataAdaptionException If an error occurred during adaptation.
-     */
-    @NotNull
-    String toJson(@NotNull UserData data, boolean pretty) throws DataAdaptionException;
-
-    /**
-     * Converts a byte array to {@link UserData}.
-     *
-     * @param data The byte array to adapt.
-     * @return The {@link UserData}.
-     * @throws DataAdaptionException If an error occurred during adaptation, such as if the byte array is invalid.
-     */
-    @NotNull
-    UserData fromBytes(final byte[] data) throws DataAdaptionException;
-
-}

common/src/main/java/net/william278/husksync/data/DataAdaptionException.java

@@ -1,11 +0,0 @@
-package net.william278.husksync.data;
-
-/**
- * Indicates an error occurred during {@link UserData} adaptation to and from (compressed) json.
- */
-public class DataAdaptionException extends RuntimeException {
-    protected DataAdaptionException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-}

common/src/main/java/net/william278/husksync/data/DataException.java

@@ -0,0 +1,72 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.data;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import net.william278.husksync.HuskSync;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.BiFunction;
+
+/**
+ * An exception related to {@link DataSnapshot} formatting, thrown if an exception occurs when unpacking a snapshot
+ */
+@Getter
+public class DataException extends IllegalStateException {
+
+    private final Reason reason;
+
+    private DataException(@NotNull DataException.Reason reason, @NotNull DataSnapshot data, @NotNull HuskSync plugin) {
+        super(reason.getMessage(plugin, data));
+        this.reason = reason;
+    }
+
+    /**
+     * Reasons why {@link DataException}s were thrown
+     */
+    @AllArgsConstructor
+    public enum Reason {
+        INVALID_MINECRAFT_VERSION((plugin, snapshot) -> String.format("The Minecraft version of the snapshot (%s) is " +
+                                                                      "newer than the server's version (%s). Ensure each server is on the same version of Minecraft.",
+                snapshot.getMinecraftVersion(), plugin.getMinecraftVersion())),
+        INVALID_FORMAT_VERSION((plugin, snapshot) -> String.format("The format version of the snapshot (%s) is newer " +
+                                                                   "than the server's version (%s). Ensure each server is running the same version of HuskSync.",
+                snapshot.getFormatVersion(), DataSnapshot.CURRENT_FORMAT_VERSION)),
+        INVALID_PLATFORM_TYPE((plugin, snapshot) -> String.format("The platform type of the snapshot (%s) does " +
+                                                                  "not match the server's platform type (%s). Ensure each server has the same platform type.",
+                snapshot.getPlatformType(), plugin.getPlatformType())),
+        NO_LEGACY_CONVERTER((plugin, snapshot) -> String.format("No legacy converter to convert format version: %s",
+                snapshot.getFormatVersion()));
+
+        private final BiFunction<HuskSync, DataSnapshot, String> exception;
+
+        @NotNull
+        String getMessage(@NotNull HuskSync plugin, @NotNull DataSnapshot data) {
+            return exception.apply(plugin, data);
+        }
+
+        @NotNull
+        DataException toException(@NotNull DataSnapshot data, @NotNull HuskSync plugin) {
+            return new DataException(this, data, plugin);
+        }
+    }
+
+}

common/src/main/java/net/william278/husksync/data/DataHolder.java

@@ -0,0 +1,161 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.data;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Map;
+import java.util.Optional;
+
+@SuppressWarnings("unused")
+public interface DataHolder {
+
+    @NotNull
+    Map<Identifier, Data> getData();
+
+    default Optional<? extends Data> getData(@NotNull Identifier id) {
+        if (getData().containsKey(id)) {
+            return Optional.of(getData().get(id));
+        }
+        return Optional.empty();
+    }
+
+    default void setData(@NotNull Identifier identifier, @NotNull Data data) {
+        getData().put(identifier, data);
+    }
+
+    @NotNull
+    default Optional<Data.Items.Inventory> getInventory() {
+        return getData(Identifier.INVENTORY).map(Data.Items.Inventory.class::cast);
+    }
+
+    default void setInventory(@NotNull Data.Items.Inventory inventory) {
+        setData(Identifier.INVENTORY, inventory);
+    }
+
+    @NotNull
+    default Optional<Data.Items.EnderChest> getEnderChest() {
+        return getData(Identifier.ENDER_CHEST).map(Data.Items.EnderChest.class::cast);
+    }
+
+    default void setEnderChest(@NotNull Data.Items.EnderChest enderChest) {
+        setData(Identifier.ENDER_CHEST, enderChest);
+    }
+
+    @NotNull
+    default Optional<Data.PotionEffects> getPotionEffects() {
+        return getData(Identifier.POTION_EFFECTS).map(Data.PotionEffects.class::cast);
+    }
+
+    default void setPotionEffects(@NotNull Data.PotionEffects potionEffects) {
+        setData(Identifier.POTION_EFFECTS, potionEffects);
+    }
+
+    @NotNull
+    default Optional<Data.Advancements> getAdvancements() {
+        return getData(Identifier.ADVANCEMENTS).map(Data.Advancements.class::cast);
+    }
+
+    default void setAdvancements(@NotNull Data.Advancements advancements) {
+        setData(Identifier.ADVANCEMENTS, advancements);
+    }
+
+    @NotNull
+    default Optional<Data.Location> getLocation() {
+        return Optional.ofNullable((Data.Location) getData().get(Identifier.LOCATION));
+    }
+
+    default void setLocation(@NotNull Data.Location location) {
+        getData().put(Identifier.LOCATION, location);
+    }
+
+    @NotNull
+    default Optional<Data.Statistics> getStatistics() {
+        return Optional.ofNullable((Data.Statistics) getData().get(Identifier.STATISTICS));
+    }
+
+    default void setStatistics(@NotNull Data.Statistics statistics) {
+        getData().put(Identifier.STATISTICS, statistics);
+    }
+
+    @NotNull
+    default Optional<Data.Health> getHealth() {
+        return Optional.ofNullable((Data.Health) getData().get(Identifier.HEALTH));
+    }
+
+    default void setHealth(@NotNull Data.Health health) {
+        getData().put(Identifier.HEALTH, health);
+    }
+
+    @NotNull
+    default Optional<Data.Hunger> getHunger() {
+        return Optional.ofNullable((Data.Hunger) getData().get(Identifier.HUNGER));
+    }
+
+    default void setHunger(@NotNull Data.Hunger hunger) {
+        getData().put(Identifier.HUNGER, hunger);
+    }
+
+    @NotNull
+    default Optional<Data.Attributes> getAttributes() {
+        return Optional.ofNullable((Data.Attributes) getData().get(Identifier.ATTRIBUTES));
+    }
+
+    default void setAttributes(@NotNull Data.Attributes attributes) {
+        getData().put(Identifier.ATTRIBUTES, attributes);
+    }
+
+    @NotNull
+    default Optional<Data.Experience> getExperience() {
+        return Optional.ofNullable((Data.Experience) getData().get(Identifier.EXPERIENCE));
+    }
+
+    default void setExperience(@NotNull Data.Experience experience) {
+        getData().put(Identifier.EXPERIENCE, experience);
+    }
+
+    @NotNull
+    default Optional<Data.GameMode> getGameMode() {
+        return Optional.ofNullable((Data.GameMode) getData().get(Identifier.GAME_MODE));
+    }
+
+    default void setGameMode(@NotNull Data.GameMode gameMode) {
+        getData().put(Identifier.GAME_MODE, gameMode);
+    }
+
+    @NotNull
+    default Optional<Data.FlightStatus> getFlightStatus() {
+        return Optional.ofNullable((Data.FlightStatus) getData().get(Identifier.FLIGHT_STATUS));
+    }
+
+    default void setFlightStatus(@NotNull Data.FlightStatus flightStatus) {
+        getData().put(Identifier.FLIGHT_STATUS, flightStatus);
+    }
+
+    @NotNull
+    default Optional<Data.PersistentData> getPersistentData() {
+        return Optional.ofNullable((Data.PersistentData) getData().get(Identifier.PERSISTENT_DATA));
+    }
+
+    default void setPersistentData(@NotNull Data.PersistentData persistentData) {
+        getData().put(Identifier.PERSISTENT_DATA, persistentData);
+    }
+
+}

common/src/main/java/net/william278/husksync/data/DataSaveCause.java

@@ -1,97 +0,0 @@
-package net.william278.husksync.data;
-
-import net.william278.husksync.player.OnlineUser;
-import net.william278.husksync.api.BaseHuskSyncAPI;
-import net.william278.husksync.player.User;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Identifies the cause of a player data save.
- *
- * @implNote This enum is saved in the database.
- * </p>
- * Cause names have a max length of 32 characters.
- */
-public enum DataSaveCause {
-
-    /**
-     * Indicates data saved when a player disconnected from the server (either to change servers, or to log off)
-     *
-     * @since 2.0
-     */
-    DISCONNECT,
-    /**
-     * Indicates data saved when the world saved
-     *
-     * @since 2.0
-     */
-    WORLD_SAVE,
-    /**
-     * Indicates data saved when the server shut down
-     *
-     * @since 2.0
-     */
-    SERVER_SHUTDOWN,
-    /**
-     * Indicates data was saved by editing inventory contents via the {@code /inventory} command
-     *
-     * @since 2.0
-     */
-    INVENTORY_COMMAND,
-    /**
-     * Indicates data was saved by editing Ender Chest contents via the {@code /enderchest} command
-     *
-     * @since 2.0
-     */
-    ENDERCHEST_COMMAND,
-    /**
-     * Indicates data was saved by restoring it from a previous version
-     *
-     * @since 2.0
-     */
-    BACKUP_RESTORE,
-    /**
-     * Indicates data was saved by an API call
-     *
-     * @see BaseHuskSyncAPI#saveUserData(OnlineUser)
-     * @see BaseHuskSyncAPI#setUserData(User, UserData)
-     * @since 2.0
-     */
-    API,
-    /**
-     * Indicates data was saved from being imported from MySQLPlayerDataBridge
-     *
-     * @since 2.0
-     */
-    MPDB_MIGRATION,
-    /**
-     * Indicates data was saved from being imported from a legacy version (v1.x)
-     *
-     * @since 2.0
-     */
-    LEGACY_MIGRATION,
-    /**
-     * Indicates data was saved by an unknown cause.
-     * </p>
-     * This should not be used and is only used for error handling purposes.
-     *
-     * @since 2.0
-     */
-    UNKNOWN;
-
-    /**
-     * Returns a {@link DataSaveCause} by name.
-     *
-     * @return the {@link DataSaveCause} or {@link #UNKNOWN} if the name is not valid.
-     */
-    @NotNull
-    public static DataSaveCause getCauseByName(@NotNull String name) {
-        for (DataSaveCause cause : values()) {
-            if (cause.name().equalsIgnoreCase(name)) {
-                return cause;
-            }
-        }
-        return UNKNOWN;
-    }
-
-}

common/src/main/java/net/william278/husksync/data/DataSerializationException.java

@@ -1,15 +0,0 @@
-package net.william278.husksync.data;
-
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Indicates an error occurred during Base-64 serialization and deserialization of data.
- * </p>
- * For example, an exception deserializing {@link ItemData} item stack or {@link PotionEffectData} potion effect arrays
- */
-public class DataSerializationException extends RuntimeException {
-    protected DataSerializationException(@NotNull String message, @NotNull Throwable cause) {
-        super(message, cause);
-    }
-
-}

common/src/main/java/net/william278/husksync/data/Identifier.java

@@ -0,0 +1,367 @@
+/*
+ * This file is part of HuskSync, licensed under the Apache License 2.0.
+ *
+ *  Copyright (c) William278 <will27528@gmail.com>
+ *  Copyright (c) contributors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package net.william278.husksync.data;
+
+import lombok.*;
+import net.kyori.adventure.key.InvalidKeyException;
+import net.kyori.adventure.key.Key;
+import net.kyori.adventure.key.KeyPattern;
+import org.intellij.lang.annotations.Subst;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Stream;
+
+/**
+ * Identifiers of different types of {@link Data}s
+ */
+@Getter
+public class Identifier implements Comparable<Identifier> {
+
+    // Namespace for built-in identifiers
+    private static final @KeyPattern String DEFAULT_NAMESPACE = "husksync";
+
+    // Built-in identifiers
+    public static final Identifier PERSISTENT_DATA = huskSync("persistent_data", true);
+    public static final Identifier INVENTORY = huskSync("inventory", true);
+    public static final Identifier ENDER_CHEST = huskSync("ender_chest", true);
+    public static final Identifier ADVANCEMENTS = huskSync("advancements", true);
+    public static final Identifier STATISTICS = huskSync("statistics", true);
+    public static final Identifier POTION_EFFECTS = huskSync("potion_effects", true);
+    public static final Identifier GAME_MODE = huskSync("game_mode", true);
+    public static final Identifier FLIGHT_STATUS = huskSync("flight_status", true,
+            Dependency.optional("game_mode")
+    );
+    public static final Identifier ATTRIBUTES = huskSync("attributes", true,
+            Dependency.optional("inventory"),
+            Dependency.optional("potion_effects")
+    );
+    public static final Identifier HEALTH = huskSync("health", true,
+            Dependency.optional("attributes")
+    );
+    public static final Identifier HUNGER = huskSync("hunger", true,
+            Dependency.optional("attributes")
+    );
+    public static final Identifier EXPERIENCE = huskSync("experience", true,
+            Dependency.optional("advancements")
+    );
+    public static final Identifier LOCATION = huskSync("location", false,
+            Dependency.optional("flight_status"),
+            Dependency.optional("potion_effects")
+    );
+
+    private final Key key;
+    private final boolean enabledByDefault;
+    @Getter
+    private final Set<Dependency> dependencies;
+    @Setter
+    @Getter
+    public boolean enabled;
+
+    private Identifier(@NotNull Key key, boolean enabledByDefault, @NotNull Set<Dependency> dependencies) {
+        this.key = key;
+        this.enabledByDefault = enabledByDefault;
+        this.enabled = enabledByDefault;
+        this.dependencies = dependencies;
+    }
+
+    /**
+     * Create an identifier from a {@link Key}
+     *
+     * @param key          the key
+     * @param dependencies the dependencies
+     * @return the identifier
+     * @since 3.5.4
+     */
+    @NotNull
+    public static Identifier from(@NotNull Key key, @NotNull Set<Dependency> dependencies) {
+        if (key.namespace().equals(DEFAULT_NAMESPACE)) {
+            throw new IllegalArgumentException("Cannot register with %s as key namespace!".formatted(key.namespace()));
+        }
+        return new Identifier(key, true, dependencies);
+    }
+
+    /**
+     * Create an identifier from a {@link Key}
+     *
+     * @param key the key
+     * @return the identifier
+     * @since 3.0
+     */
+    @NotNull
+    public static Identifier from(@NotNull Key key) {
+        return from(key, Collections.emptySet());
+    }
+
+    /**
+     * Create an identifier from a namespace and value
+     *
+     * @param plugin the namespace
+     * @param name   the value
+     * @return the identifier
+     * @since 3.0
+     */
+    @NotNull
+    public static Identifier from(@Subst("plugin") @NotNull String plugin, @Subst("null") @NotNull String name) {
+        return from(Key.key(plugin, name));
+    }
+
+    /**
+     * Create an identifier from a namespace, value, and dependencies
+     *
+     * @param plugin       the namespace
+     * @param name         the value
+     * @param dependencies the dependencies
+     * @return the identifier
+     * @since 3.5.4
+     */
+    @NotNull
+    public static Identifier from(@Subst("plugin") @NotNull String plugin, @Subst("null") @NotNull String name,
+                                  @NotNull Set<Dependency> dependencies) {
+        return from(Key.key(plugin, name), dependencies);
+    }
+
+    // Return an identifier with a HuskSync namespace
+    @NotNull
+    private static Identifier huskSync(@Subst("null") @NotNull String name,
+                                       boolean configDefault) throws InvalidKeyException {
+        return new Identifier(Key.key(DEFAULT_NAMESPACE, name), configDefault, Collections.emptySet());
+    }
+
+    // Return an identifier with a HuskSync namespace
+    @NotNull
+    private static Identifier huskSync(@Subst("null") @NotNull String name,
+                                       @SuppressWarnings("SameParameterValue") boolean configDefault,
+                                       @NotNull Dependency... dependents) throws InvalidKeyException {
+        return new Identifier(Key.key(DEFAULT_NAMESPACE, name), configDefault, Set.of(dependents));
+    }
+
+    /**
+     * <b>(Internal use only)</b> - Get a map of the default config entries for all HuskSync identifiers
+     *
+     * @return a map of all the config entries
+     * @since 3.0
+     */
+    @NotNull
+    @ApiStatus.Internal
+    @SuppressWarnings("unchecked")
+    public static Map<String, Boolean> getConfigMap() {
+        return Map.ofEntries(Stream.of(
+                        INVENTORY, ENDER_CHEST, POTION_EFFECTS, ADVANCEMENTS, LOCATION, STATISTICS,
+                        HEALTH, HUNGER, ATTRIBUTES, EXPERIENCE, GAME_MODE, FLIGHT_STATUS, PERSISTENT_DATA
+                )
+                .map(Identifier::getConfigEntry)
+                .toArray(Map.Entry[]::new));
+    }
+
+    /**
+     * Returns {@code true} if the identifier depends on the given identifier
+     *
+     * @param identifier the identifier to check
+     * @return {@code true} if the identifier depends on the given identifier
+     * @since 3.5.4
+     */
+    public boolean dependsOn(@NotNull Identifier identifier) {
+        return dependencies.contains(Dependency.required(identifier.key));
+    }
+
+    /**
+     * Get the namespace of the identifier
+     *
+     * @return the namespace
+     */
+    @NotNull
+    public String getKeyNamespace() {
+        return key.namespace();
+    }
+
+    /**
+     * Get the value of the identifier
+     *
+     * @return the value
+     */
+    @NotNull
+    public String getKeyValue() {
+        return key.value();
+    }
+
+    /**
+     * Returns {@code true} if the identifier is a custom (non-HuskSync) identifier
+     *
+     * @return {@code false} if {@link #getKeyNamespace()} returns "husksync"; {@code true} otherwise
+     */
+    public boolean isCustom() {
+        return !getKeyNamespace().equals(DEFAULT_NAMESPACE);
+    }
+
+    /**
+     * Get the minimal string representation of this key.
+     * <p>
+     * If the namespace of the key is {@link #DEFAULT_NAMESPACE}, only the key value will be returned.
+     *
+     * @return the minimal string key representation
+     * @since 3.8
+     */
+    @NotNull
+    public String asMinimalString() {
+        if (getKey().namespace().equals(DEFAULT_NAMESPACE)) {
+            return getKey().value();
+        }
+        return getKey().asString();
+    }
+
+    /**
+     * Returns the identifier as a string (the key)
+     *
+     * @return the identifier as a string
+     * @since 3.0
+     */
+    @NotNull
+    @Override
+    public String toString() {
+        return key.asString();
+    }
+
+    /**
+     * Return whether this Identifier is equal to another Identifier
+     *
+     * @param obj another object
+     * @return {@code true} if this identifier matches the identifier of {@code obj}
+     * @since 3.8
+     */
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof Identifier other) {
+            return asMinimalString().equals(other.asMinimalString());
+        }
+        return false;
+    }
+
+    /**
+     * Get the hash code of the Identifier (equivalent to {@link #asMinimalString()}->{@code #hashCode()}
+     *
+     * @return the hash code
+     * @since 3.8
+     */
+    @Override
+    public int hashCode() {
+        return asMinimalString().hashCode();
+    }
+
+    // Get the config entry for the identifier
+    @NotNull
+    private Map.Entry<String, Boolean> getConfigEntry() {
+        return Map.entry(getKeyValue(), enabledByDefault);
+    }
+
+    // Comparable; always sort this Identifier after any dependencies
+    @Override
+    public int compareTo(@NotNull Identifier o) {
+        if (this.dependsOn(o)) return 1;
+        if (o.dependsOn(this)) return -1;
+        return this.key.compareTo(o.key);
+    }
+
+    /**
+     * Compares two identifiers based on their dependencies.
+     * <p>
+     * If this identifier contains a dependency on the other, it should come after & vice versa
+     *
+     * @since 3.5.4
+     */
+    @NoArgsConstructor(access = AccessLevel.PACKAGE)
+    static class DependencyOrderComparator implements Comparator<Identifier> {
+
+        @Override
+        public int compare(@NotNull Identifier i1, @NotNull Identifier i2) {
+            if (i1.equals(i2)) {
+                return 0;
+            }
+            if (i1.dependsOn(i2)) {
+                if (i2.dependsOn(i1)) {
+                    throw new IllegalArgumentException(
+                            "Found circular dependency between %s and %s".formatted(i1.getKey(), i2.getKey())
+                    );
+                }
+                return 1;
+            }
+            return -1;
+        }
+
+    }
+
+    /**
+     * Represents a data dependency of an identifier, used to determine the order in which data is applied to users
+     *
+     * @since 3.5.4
+     */
+    @Getter
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Dependency {
+        /**
+         * Key of the data dependency see {@code Identifier#key()}
+         */
+        private Key key;
+        /**
+         * Whether the data dependency is required to be present & enabled for the dependant data to enabled
+         */
+        private boolean required;
+
+        @NotNull
+        protected static Dependency required(@NotNull Key identifier) {
+            return new Dependency(identifier, true);
+        }
+
+        @NotNull
+        public static Dependency optional(@NotNull Key identifier) {
+            return new Dependency(identifier, false);
+        }
+
+        @NotNull
+        @SuppressWarnings("SameParameterValue")
+        private static Dependency required(@Subst("null") @NotNull String identifier) {
+            return required(Key.key("husksync", identifier));
+        }
+
+        @NotNull
+        private static Dependency optional(@Subst("null") @NotNull String identifier) {
+            return optional(Key.key("husksync", identifier));
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (obj instanceof Dependency other) {
+                return key.equals(other.key);
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return key.toString().hashCode();
+        }
+    }
+
+}

common/src/main/java/net/william278/husksync/data/ItemData.java

@@ -1,25 +0,0 @@
-package net.william278.husksync.data;
-
-import com.google.gson.annotations.SerializedName;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Stores information about the contents of a player's inventory or Ender Chest.
- */
-public class ItemData {
-
-    /**
-     * A Base-64 string of platform-serialized items
-     */
-    @SerializedName("serialized_items")
-    public String serializedItems;
-
-    public ItemData(@NotNull final String serializedItems) {
-        this.serializedItems = serializedItems;
-    }
-
-    @SuppressWarnings("unused")
-    protected ItemData() {
-    }
-
-}

common/src/main/java/net/william278/husksync/data/JsonDataAdapter.java

@@ -1,29 +0,0 @@
-package net.william278.husksync.data;
-
-import com.google.gson.GsonBuilder;
-import com.google.gson.JsonSyntaxException;
-import org.jetbrains.annotations.NotNull;
-
-import java.nio.charset.StandardCharsets;
-
-public class JsonDataAdapter implements DataAdapter {
-
-    @Override
-    public byte[] toBytes(@NotNull UserData data) throws DataAdaptionException {
-        return toJson(data, false).getBytes(StandardCharsets.UTF_8);
-    }
-
-    @Override
-    public @NotNull String toJson(@NotNull UserData data, boolean pretty) throws DataAdaptionException {
-        return (pretty ? new GsonBuilder().setPrettyPrinting() : new GsonBuilder()).create().toJson(data);
-    }
-
-    @Override
-    public @NotNull UserData fromBytes(byte[] data) throws DataAdaptionException {
-        try {
-            return new GsonBuilder().create().fromJson(new String(data, StandardCharsets.UTF_8), UserData.class);
-        } catch (JsonSyntaxException e) {
-            throw new DataAdaptionException("Failed to parse JSON data", e);
-        }
-    }
-}