Cleaned up BentoBox

# Conflicts:
#	eco-core/core-plugin/build.gradle

README.md

@@ -1,6 +1,6 @@
 <h1 align="center">
   <br>
-  <img src="https://i.imgur.com/p5uR2Qp.png" alt="eco logo" width="256">
+  <img src="https://i.imgur.com/kU3ejCt.png" alt="eco logo" width="256">
   <br>
 </h1>
 
@@ -157,7 +157,7 @@ Here's a list of some (not all) of the features of eco:
 
 <h1 align="center">
   <br>
-    <a href="http://gamersupps.gg/discount/Auxilor?afmc=Auxilor" target="_blank">
+    <a href="https://gamersupps.gg/discount/Auxilor?afmc=Auxilor" target="_blank">
       <img src="https://i.imgur.com/uFDpBAC.png" alt="supps banner">
     </a>
     <a href="https://dedimc.promo/Auxilor" target="_blank">

build.gradle

@@ -25,11 +25,14 @@ allprojects {
         mavenLocal()
         maven { url 'https://jitpack.io' }
 
+        // SuperiorSkyblock2
+        maven { url 'https://repo.bg-software.com/repository/api/' }
+
         // NMS (for jitpack compilation)
         maven { url 'https://repo.codemc.org/repository/nms/' }
 
-        // bStats, mcMMO
-        maven { url 'https://repo.codemc.org/repository/maven-public' }
+        // bStats, mcMMO, BentoBox
+        maven { url 'https://repo.codemc.org/repository/maven-public/' }
 
         // Spigot API
         maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/' }
@@ -51,23 +54,20 @@ allprojects {
 
         // CombatLogX
         maven { url 'https://nexus.sirblobman.xyz/repository/public/' }
-
-        // Head Database
-        maven { url 'https://mvn.intellectualsites.com/content/groups/public/' }
     }
 
     dependencies {
         compileOnly 'org.jetbrains:annotations:19.0.0'
 
         // Lombok
-        compileOnly 'org.projectlombok:lombok:1.18.20'
+        compileOnly 'org.projectlombok:lombok:1.18.22'
         annotationProcessor 'org.projectlombok:lombok:1.18.20'
         testCompileOnly 'org.projectlombok:lombok:1.18.20'
         testAnnotationProcessor 'org.projectlombok:lombok:1.18.20'
 
         // Test
         testImplementation 'org.junit.jupiter:junit-jupiter-api:5.3.1'
-        testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.3.1'
+        testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.1'
     }
 
     tasks.withType(JavaCompile) {
@@ -87,8 +87,7 @@ allprojects {
 
     shadowJar {
         relocate('org.bstats', 'com.willfp.eco.shaded.bstats')
-        relocate('net.kyori.adventure.text.minimessage', 'com.willfp.eco.shaded.adventure.minimessage')
-        relocate('net.kyori.adventure.platform', 'com.willfp.eco.shaded.adventure.platform')
+        relocate('net.kyori.adventure.text.minimessage', 'com.willfp.eco.shaded.minimessage')
     }
 
     jar {

eco-api/build.gradle

@@ -6,14 +6,18 @@ group 'com.willfp'
 version rootProject.version
 
 dependencies {
-    compileOnly 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'
-    compileOnly 'org.apache.maven:maven-artifact:3.0.3'
-    compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'
-    compileOnly 'com.google.code.gson:gson:2.8.7'
-    compileOnly 'net.kyori:adventure-text-serializer-gson:4.8.1'
-    compileOnly 'net.kyori:adventure-text-serializer-legacy:4.8.1'
-    compileOnly 'net.kyori:adventure-text-minimessage:4.1.0-SNAPSHOT'
+    // Adventure
     compileOnly 'net.kyori:adventure-platform-bukkit:4.0.0'
+    compileOnly 'net.kyori:adventure-text-minimessage:4.1.0-SNAPSHOT'
+    compileOnly 'net.kyori:adventure-api:4.9.2'
+    compileOnly 'net.kyori:adventure-text-serializer-gson:4.9.2'
+    compileOnly 'net.kyori:adventure-text-serializer-legacy:4.9.2'
+
+    // Other
+    compileOnly 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'
+    compileOnly 'org.apache.maven:maven-artifact:3.8.1'
+    compileOnly 'com.comphenix.protocol:ProtocolLib:4.7.1-SNAPSHOT'
+    compileOnly 'com.google.code.gson:gson:2.8.8'
 }
 
 java {

eco-api/src/main/java/com/willfp/eco/core/Eco.java

@@ -1,6 +1,5 @@
 package com.willfp.eco.core;
 
-import lombok.Getter;
 import lombok.experimental.UtilityClass;
 import org.apache.commons.lang.Validate;
 import org.jetbrains.annotations.ApiStatus;
@@ -15,20 +14,12 @@ import org.jetbrains.annotations.NotNull;
 public class Eco {
     /**
      * Instance of eco handler.
-     * <p>
-     * The handler is, in essence, a way to interface between the eco-api
-     * frontend module, and the eco-backend implementations.
-     * <p>
-     * There shouldn't really be any reason to ever use the handler
-     * in your own plugins, but if you want to then you can - it's
-     * just a part of the API like any other.
      */
-    @Getter
+    @ApiStatus.Internal
     private Handler handler;
 
     /**
      * Set the handler.
-     *
      * @param handler The handler.
      */
     @ApiStatus.Internal
@@ -37,4 +28,25 @@ public class Eco {
 
         Eco.handler = handler;
     }
+
+    /**
+     * Get the instance of the eco handler.
+     * <p>
+     * The handler is, in essence, a way to interface between the eco-api
+     * frontend module, and the eco-backend implementations.
+     * <p>
+     * There shouldn't really be any reason to ever use the handler
+     * in your own plugins, and you are likely to break things. All parts of
+     * the handler are abstracted into logically named parts of the API.
+     * <p>
+     * In versions of eco before 6.12.0, the handler was considered part of
+     * the eco API, however it has since been moved into an internal component
+     * that shouldn't be used in your plugins.
+     *
+     * @return The handler.
+     */
+    @ApiStatus.Internal
+    public Handler getHandler() {
+        return handler;
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/EcoPlugin.java

@@ -52,7 +52,7 @@ import java.util.stream.Collectors;
  * be cancelled.</b>
  */
 @SuppressWarnings("unused")
-public abstract class EcoPlugin extends JavaPlugin {
+public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
     /**
      * The polymart resource ID of the plugin.
      */

eco-api/src/main/java/com/willfp/eco/core/Handler.java

@@ -2,6 +2,8 @@ package com.willfp.eco.core;
 
 import com.willfp.eco.core.config.updating.ConfigHandler;
 import com.willfp.eco.core.config.wrapper.ConfigFactory;
+import com.willfp.eco.core.data.keys.KeyRegistry;
+import com.willfp.eco.core.data.PlayerProfileHandler;
 import com.willfp.eco.core.drops.DropQueueFactory;
 import com.willfp.eco.core.events.EventManager;
 import com.willfp.eco.core.extensions.ExtensionLoader;
@@ -17,6 +19,7 @@ import com.willfp.eco.core.requirement.RequirementFactory;
 import com.willfp.eco.core.scheduling.Scheduler;
 import net.kyori.adventure.platform.bukkit.BukkitAudiences;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -24,8 +27,9 @@ import java.util.List;
 import java.util.logging.Logger;
 
 /**
- * @see Eco
+ * @see Eco#getHandler()
  */
+@ApiStatus.Internal
 public interface Handler {
     /**
      * Create a scheduler.
@@ -210,6 +214,21 @@ public interface Handler {
      *
      * @return The audiences.
      */
-    @NotNull
+    @Nullable
     BukkitAudiences getAdventure();
+
+    /**
+     * Get the key registry.
+     *
+     * @return The registry.
+     */
+    @NotNull
+    KeyRegistry getKeyRegistry();
+
+    /**
+     * Get the PlayerProfile handler.
+     *
+     * @return The handler.
+     */
+    PlayerProfileHandler getPlayerProfileHandler();
 }

eco-api/src/main/java/com/willfp/eco/core/PluginDependent.java

@@ -9,7 +9,7 @@ import org.jetbrains.annotations.NotNull;
  *
  * @param <T> The eco plugin type.
  */
-public abstract class PluginDependent<@NotNull T extends EcoPlugin> {
+public abstract class PluginDependent<T extends EcoPlugin> {
     /**
      * The {@link EcoPlugin} that is stored.
      */

eco-api/src/main/java/com/willfp/eco/core/PluginLike.java

@@ -0,0 +1,29 @@
+package com.willfp.eco.core;
+
+import com.willfp.eco.core.config.updating.ConfigHandler;
+
+import java.io.File;
+
+/**
+ * Represents any class that acts like a plugin, for example {@link EcoPlugin}
+ * or {@link com.willfp.eco.core.extensions.Extension}. This exists to create
+ * things such as extension base configs rather than needing to pass an instance
+ * of the owning plugin.
+ */
+public interface PluginLike {
+    /**
+     * Get the data folder of the object.
+     * <p>
+     * Returns the plugin data folder for a plugin, or the extension's parent plugin's folder
+     *
+     * @return The data folder.
+     */
+    File getDataFolder();
+
+    /**
+     * Get the handler class for updatable classes.
+     *
+     * @return The config handler.
+     */
+    ConfigHandler getConfigHandler();
+}

eco-api/src/main/java/com/willfp/eco/core/config/interfaces/LoadableConfig.java

@@ -34,7 +34,7 @@ public interface LoadableConfig {
     File getConfigFile();
 
     /**
-     * Get the config name (including extension)
+     * Get the config name (including extension).
      *
      * @return The name.
      */

eco-api/src/main/java/com/willfp/eco/core/config/json/JSONBaseConfig.java

@@ -2,8 +2,8 @@ package com.willfp.eco.core.config.json;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.json.wrapper.LoadableJSONConfigWrapper;
-import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -20,7 +20,7 @@ public abstract class JSONBaseConfig extends LoadableJSONConfigWrapper {
      */
     protected JSONBaseConfig(@NotNull final String configName,
                              final boolean removeUnused,
-                             @NotNull final EcoPlugin plugin,
+                             @NotNull final PluginLike plugin,
                              @NotNull final String... updateBlacklist) {
         super(
                 Eco.getHandler().getConfigFactory().createUpdatableJSONConfig(
@@ -40,7 +40,7 @@ public abstract class JSONBaseConfig extends LoadableJSONConfigWrapper {
      */
     protected JSONBaseConfig(@NotNull final String configName,
                              final boolean removeUnused,
-                             @NotNull final EcoPlugin plugin) {
+                             @NotNull final PluginLike plugin) {
         super(
                 Eco.getHandler().getConfigFactory().createUpdatableJSONConfig(
                         configName,
@@ -51,4 +51,28 @@ public abstract class JSONBaseConfig extends LoadableJSONConfigWrapper {
                 )
         );
     }
-}
+
+    /**
+     * @param configName      The name of the config
+     * @param removeUnused    Whether keys not present in the default config should be removed on update.
+     * @param plugin          The plugin.
+     * @param updateBlacklist Substring of keys to not add/remove keys for.
+     */
+    protected JSONBaseConfig(@NotNull final String configName,
+                             final boolean removeUnused,
+                             @NotNull final EcoPlugin plugin,
+                             @NotNull final String... updateBlacklist) {
+        this(configName, removeUnused, (PluginLike) plugin, updateBlacklist);
+    }
+
+    /**
+     * @param configName   The name of the config
+     * @param removeUnused Whether keys not present in the default config should be removed on update.
+     * @param plugin       The plugin.
+     */
+    protected JSONBaseConfig(@NotNull final String configName,
+                             final boolean removeUnused,
+                             @NotNull final EcoPlugin plugin) {
+        this(configName, removeUnused, (PluginLike) plugin);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/config/json/JSONExtendableConfig.java

@@ -2,8 +2,8 @@ package com.willfp.eco.core.config.json;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.json.wrapper.LoadableJSONConfigWrapper;
-import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -26,7 +26,7 @@ public abstract class JSONExtendableConfig extends LoadableJSONConfigWrapper {
      */
     protected JSONExtendableConfig(@NotNull final String configName,
                                    final boolean removeUnused,
-                                   @NotNull final EcoPlugin plugin,
+                                   @NotNull final PluginLike plugin,
                                    @NotNull final Class<?> source,
                                    @NotNull final String subDirectoryPath,
                                    @NotNull final String... updateBlacklist) {
@@ -41,4 +41,20 @@ public abstract class JSONExtendableConfig extends LoadableJSONConfigWrapper {
                 )
         );
     }
+    /**
+     * @param configName       The name of the config
+     * @param removeUnused     Whether keys not present in the default config should be removed on update.
+     * @param plugin           The plugin.
+     * @param updateBlacklist  Substring of keys to not add/remove keys for.
+     * @param subDirectoryPath The subdirectory path.
+     * @param source           The class that owns the resource.
+     */
+    protected JSONExtendableConfig(@NotNull final String configName,
+                                   final boolean removeUnused,
+                                   @NotNull final EcoPlugin plugin,
+                                   @NotNull final Class<?> source,
+                                   @NotNull final String subDirectoryPath,
+                                   @NotNull final String... updateBlacklist) {
+        this(configName, removeUnused, (PluginLike) plugin, source, subDirectoryPath, updateBlacklist);
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/config/json/JSONStaticBaseConfig.java

@@ -2,6 +2,7 @@ package com.willfp.eco.core.config.json;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.json.wrapper.LoadableJSONConfigWrapper;
 import org.jetbrains.annotations.NotNull;
 
@@ -18,7 +19,20 @@ public abstract class JSONStaticBaseConfig extends LoadableJSONConfigWrapper {
      * @param plugin     The plugin.
      */
     protected JSONStaticBaseConfig(@NotNull final String configName,
-                                   @NotNull final EcoPlugin plugin) {
+                                   @NotNull final PluginLike plugin) {
         super(Eco.getHandler().getConfigFactory().createLoadableJSONConfig(configName, plugin, "", plugin.getClass()));
     }
+
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.json, lang.json).
+     * <p>
+     * Does not automatically update.
+     *
+     * @param configName The name of the config
+     * @param plugin     The plugin.
+     */
+    protected JSONStaticBaseConfig(@NotNull final String configName,
+                                   @NotNull final EcoPlugin plugin) {
+        this(configName, (PluginLike) plugin);
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/config/updating/ConfigHandler.java

@@ -4,7 +4,7 @@ import com.willfp.eco.core.config.interfaces.LoadableConfig;
 import org.jetbrains.annotations.NotNull;
 
 /**
- * Every {@link com.willfp.eco.core.EcoPlugin} has a config handler.
+ * Every {@link com.willfp.eco.core.PluginLike} has a config handler.
  * <p>
  * Handles updating and saving configs.
  */

eco-api/src/main/java/com/willfp/eco/core/config/wrapper/ConfigFactory.java

@@ -1,6 +1,6 @@
 package com.willfp.eco.core.config.wrapper;
 
-import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.interfaces.Config;
 import com.willfp.eco.core.config.interfaces.JSONConfig;
 import org.bukkit.configuration.file.YamlConfiguration;
@@ -24,7 +24,7 @@ public interface ConfigFactory {
      * @return The config implementation.
      */
     Config createUpdatableYamlConfig(@NotNull String configName,
-                                     @NotNull EcoPlugin plugin,
+                                     @NotNull PluginLike plugin,
                                      @NotNull String subDirectoryPath,
                                      @NotNull Class<?> source,
                                      boolean removeUnused,
@@ -42,7 +42,7 @@ public interface ConfigFactory {
      * @return The config implementation.
      */
     JSONConfig createUpdatableJSONConfig(@NotNull String configName,
-                                         @NotNull EcoPlugin plugin,
+                                         @NotNull PluginLike plugin,
                                          @NotNull String subDirectoryPath,
                                          @NotNull Class<?> source,
                                          boolean removeUnused,
@@ -58,7 +58,7 @@ public interface ConfigFactory {
      * @return The config implementation.
      */
     JSONConfig createLoadableJSONConfig(@NotNull String configName,
-                                        @NotNull EcoPlugin plugin,
+                                        @NotNull PluginLike plugin,
                                         @NotNull String subDirectoryPath,
                                         @NotNull Class<?> source);
 
@@ -72,7 +72,7 @@ public interface ConfigFactory {
      * @return The config implementation.
      */
     Config createLoadableYamlConfig(@NotNull String configName,
-                                    @NotNull EcoPlugin plugin,
+                                    @NotNull PluginLike plugin,
                                     @NotNull String subDirectoryPath,
                                     @NotNull Class<?> source);
 

eco-api/src/main/java/com/willfp/eco/core/config/yaml/YamlBaseConfig.java

@@ -2,6 +2,7 @@ package com.willfp.eco.core.config.yaml;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
 import org.jetbrains.annotations.NotNull;
 
@@ -19,7 +20,7 @@ public abstract class YamlBaseConfig extends LoadableYamlConfigWrapper {
      */
     protected YamlBaseConfig(@NotNull final String configName,
                              final boolean removeUnused,
-                             @NotNull final EcoPlugin plugin,
+                             @NotNull final PluginLike plugin,
                              @NotNull final String... updateBlacklist) {
         super(
                 Eco.getHandler().getConfigFactory().createUpdatableYamlConfig(
@@ -39,7 +40,7 @@ public abstract class YamlBaseConfig extends LoadableYamlConfigWrapper {
      */
     protected YamlBaseConfig(@NotNull final String configName,
                              final boolean removeUnused,
-                             @NotNull final EcoPlugin plugin) {
+                             @NotNull final PluginLike plugin) {
         super(
                 Eco.getHandler().getConfigFactory().createUpdatableYamlConfig(
                         configName,
@@ -50,4 +51,28 @@ public abstract class YamlBaseConfig extends LoadableYamlConfigWrapper {
                 )
         );
     }
+
+    /**
+     * @param configName      The name of the config
+     * @param removeUnused    Whether keys not present in the default config should be removed on update.
+     * @param plugin          The plugin.
+     * @param updateBlacklist Substring of keys to not add/remove keys for.
+     */
+    protected YamlBaseConfig(@NotNull final String configName,
+                             final boolean removeUnused,
+                             @NotNull final EcoPlugin plugin,
+                             @NotNull final String... updateBlacklist) {
+        this(configName, removeUnused, (PluginLike) plugin, updateBlacklist);
+    }
+
+    /**
+     * @param configName   The name of the config
+     * @param removeUnused Whether keys not present in the default config should be removed on update.
+     * @param plugin       The plugin.
+     */
+    protected YamlBaseConfig(@NotNull final String configName,
+                             final boolean removeUnused,
+                             @NotNull final EcoPlugin plugin) {
+        this(configName, removeUnused, (PluginLike) plugin);
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/config/yaml/YamlExtendableConfig.java

@@ -2,6 +2,7 @@ package com.willfp.eco.core.config.yaml;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
 import org.jetbrains.annotations.NotNull;
 
@@ -25,7 +26,7 @@ public abstract class YamlExtendableConfig extends LoadableYamlConfigWrapper {
      */
     protected YamlExtendableConfig(@NotNull final String configName,
                                    final boolean removeUnused,
-                                   @NotNull final EcoPlugin plugin,
+                                   @NotNull final PluginLike plugin,
                                    @NotNull final Class<?> source,
                                    @NotNull final String subDirectoryPath,
                                    @NotNull final String... updateBlacklist) {
@@ -40,4 +41,20 @@ public abstract class YamlExtendableConfig extends LoadableYamlConfigWrapper {
                 )
         );
     }
+    /**
+     * @param configName       The name of the config
+     * @param removeUnused     Whether keys not present in the default config should be removed on update.
+     * @param plugin           The plugin.
+     * @param updateBlacklist  Substring of keys to not add/remove keys for.
+     * @param subDirectoryPath The subdirectory path.
+     * @param source           The class that owns the resource.
+     */
+    protected YamlExtendableConfig(@NotNull final String configName,
+                                   final boolean removeUnused,
+                                   @NotNull final EcoPlugin plugin,
+                                   @NotNull final Class<?> source,
+                                   @NotNull final String subDirectoryPath,
+                                   @NotNull final String... updateBlacklist) {
+        this(configName, removeUnused, (PluginLike) plugin, source, subDirectoryPath, updateBlacklist);
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/config/yaml/YamlStaticBaseConfig.java

@@ -2,6 +2,7 @@ package com.willfp.eco.core.config.yaml;
 
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
 import org.jetbrains.annotations.NotNull;
 
@@ -18,7 +19,20 @@ public abstract class YamlStaticBaseConfig extends LoadableYamlConfigWrapper {
      * @param plugin     The plugin.
      */
     protected YamlStaticBaseConfig(@NotNull final String configName,
-                                   @NotNull final EcoPlugin plugin) {
+                                   @NotNull final PluginLike plugin) {
         super(Eco.getHandler().getConfigFactory().createLoadableYamlConfig(configName, plugin, "", plugin.getClass()));
     }
+
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Does not automatically update.
+     *
+     * @param configName The name of the config
+     * @param plugin     The plugin.
+     */
+    protected YamlStaticBaseConfig(@NotNull final String configName,
+                                   @NotNull final EcoPlugin plugin) {
+        this(configName, (PluginLike) plugin);
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/data/PlayerProfile.java

@@ -0,0 +1,56 @@
+package com.willfp.eco.core.data;
+
+import com.willfp.eco.core.Eco;
+import com.willfp.eco.core.data.keys.PersistentDataKey;
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * Persistent data storage interface for players.
+ * <p>
+ * Profiles save automatically, so there is no need to save after changes.
+ */
+public interface PlayerProfile {
+    /**
+     * Write a key to a player's persistent data.
+     *
+     * @param key   The key.
+     * @param value The value.
+     * @param <T>   The type of the key.
+     */
+    <T> void write(@NotNull PersistentDataKey<T> key,
+                   @NotNull T value);
+
+    /**
+     * Read a key from a player's persistent data.
+     *
+     * @param key The key.
+     * @param <T> The type of the key.
+     * @return The value, or the default value if not found.
+     */
+    <T> @NotNull T read(@NotNull PersistentDataKey<T> key);
+
+    /**
+     * Load a player profile.
+     *
+     * @param player The player.
+     * @return The profile.
+     */
+    @NotNull
+    static PlayerProfile load(@NotNull final OfflinePlayer player) {
+        return load(player.getUniqueId());
+    }
+
+    /**
+     * Load a player profile.
+     *
+     * @param uuid The player's UUID.
+     * @return The profile.
+     */
+    @NotNull
+    static PlayerProfile load(@NotNull final UUID uuid) {
+        return Eco.getHandler().getPlayerProfileHandler().load(uuid);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/data/PlayerProfileHandler.java

@@ -0,0 +1,32 @@
+package com.willfp.eco.core.data;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * API to handle player profiles.
+ */
+public interface PlayerProfileHandler {
+    /**
+     * Load a player profile.
+     *
+     * @param uuid The UUID.
+     * @return The profile.
+     */
+    PlayerProfile load(@NotNull UUID uuid);
+
+    /**
+     * Save a player profile.
+     *
+     * @param uuid The uuid.
+     */
+    void savePlayer(@NotNull UUID uuid);
+
+    /**
+     * Save all player data.
+     *
+     * @param async If the saving should be done asynchronously.
+     */
+    void saveAll(boolean async);
+}

eco-api/src/main/java/com/willfp/eco/core/data/keys/KeyRegistry.java

@@ -0,0 +1,24 @@
+package com.willfp.eco.core.data.keys;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Set;
+
+/**
+ * API to register persistent data keys.
+ */
+public interface KeyRegistry {
+    /**
+     * Register a persistent data key to be stored.
+     *
+     * @param key The key.
+     */
+    void registerKey(@NotNull PersistentDataKey<?> key);
+
+    /**
+     * Get all registered keys.
+     *
+     * @return The keys.
+     */
+    Set<PersistentDataKey<?>> getRegisteredKeys();
+}

eco-api/src/main/java/com/willfp/eco/core/data/keys/PersistentDataKey.java

@@ -0,0 +1,57 @@
+package com.willfp.eco.core.data.keys;
+
+import com.willfp.eco.core.Eco;
+import lombok.Getter;
+import org.bukkit.NamespacedKey;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * A persistent data key is a key with a type that can be stored about an offline player.
+ *
+ * @param <T> The type of the data.
+ */
+public class PersistentDataKey<T> {
+    /**
+     * The key of the persistent data value.
+     */
+    @Getter
+    private final NamespacedKey key;
+
+    /**
+     * The default value for the key.
+     */
+    @Getter
+    private final T defaultValue;
+
+    /**
+     * The persistent data key type.
+     */
+    @Getter
+    private final PersistentDataKeyType type;
+
+    /**
+     * Create a new Persistent Data Key.
+     *
+     * @param key          The key.
+     * @param type         The data type.
+     * @param defaultValue The default value.
+     */
+    public PersistentDataKey(@NotNull final NamespacedKey key,
+                             @NotNull final PersistentDataKeyType type,
+                             @NotNull final T defaultValue) {
+        this.key = key;
+        this.defaultValue = defaultValue;
+        this.type = type;
+
+        Eco.getHandler().getKeyRegistry().registerKey(this);
+    }
+
+    @Override
+    public String toString() {
+        return "PersistentDataKey{"
+                + "key=" + key
+                + ", defaultValue=" + defaultValue
+                + ", type=" + type
+                + '}';
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/data/keys/PersistentDataKeyType.java

@@ -0,0 +1,26 @@
+package com.willfp.eco.core.data.keys;
+
+/**
+ * All storable data key types.
+ */
+public enum PersistentDataKeyType {
+    /**
+     * String.
+     */
+    STRING,
+
+    /**
+     * Boolean.
+     */
+    BOOLEAN,
+
+    /**
+     * Integer.
+     */
+    INT,
+
+    /**
+     * Double.
+     */
+    DOUBLE
+}

eco-api/src/main/java/com/willfp/eco/core/display/Display.java

@@ -20,7 +20,7 @@ public class Display {
     /**
      * The display handler.
      */
-    public static DisplayHandler handler = null;
+    private static DisplayHandler handler = null;
 
     /**
      * Display on ItemStacks.
@@ -160,4 +160,20 @@ public class Display {
             module.display(itemStack, player, args);
         }
     }
+
+    /**
+     * Set the display handler.
+     * <p>
+     * Internal API component, you will cause bugs if you create your own handler.
+     *
+     * @param handler The handler.
+     */
+    @ApiStatus.Internal
+    public static void setHandler(@NotNull final DisplayHandler handler) {
+        if (Display.handler != null) {
+            throw new IllegalStateException("Display already initialized!");
+        }
+
+        Display.handler = handler;
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/display/DisplayHandler.java

@@ -23,8 +23,8 @@ public interface DisplayHandler {
      * @param player    The player.
      * @return The ItemStack.
      */
-    ItemStack display(@NotNull final ItemStack itemStack,
-                      @Nullable final Player player);
+    ItemStack display(@NotNull ItemStack itemStack,
+                      @Nullable Player player);
 
     /**
      * Revert on ItemStacks.
@@ -32,7 +32,7 @@ public interface DisplayHandler {
      * @param itemStack The item.
      * @return The ItemStack.
      */
-    ItemStack revert(@NotNull final ItemStack itemStack);
+    ItemStack revert(@NotNull ItemStack itemStack);
 
     /**
      * Finalize an ItemStacks.
@@ -40,7 +40,7 @@ public interface DisplayHandler {
      * @param itemStack The item.
      * @return The ItemStack.
      */
-    ItemStack finalize(@NotNull final ItemStack itemStack);
+    ItemStack finalize(@NotNull ItemStack itemStack);
 
     /**
      * Unfinalize an ItemStacks.
@@ -48,7 +48,7 @@ public interface DisplayHandler {
      * @param itemStack The item.
      * @return The ItemStack.
      */
-    ItemStack unfinalize(@NotNull final ItemStack itemStack);
+    ItemStack unfinalize(@NotNull ItemStack itemStack);
 
     /**
      * If an item is finalized.
@@ -56,5 +56,5 @@ public interface DisplayHandler {
      * @param itemStack The item.
      * @return If finalized.
      */
-    boolean isFinalized(@NotNull final ItemStack itemStack);
+    boolean isFinalized(@NotNull ItemStack itemStack);
 }

eco-api/src/main/java/com/willfp/eco/core/extensions/Extension.java

@@ -1,11 +1,15 @@
 package com.willfp.eco.core.extensions;
 
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginLike;
+import com.willfp.eco.core.config.updating.ConfigHandler;
 import lombok.AccessLevel;
 import lombok.Getter;
 import org.apache.commons.lang.Validate;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.File;
+
 /**
  * An extension is a separate jar file that hooks into the base plugin jar.
  * <p>
@@ -15,9 +19,9 @@ import org.jetbrains.annotations.NotNull;
  * Syntactically, extensions are very similar to plugins in their own right, except that
  * they are loaded by another plugin.
  *
- * @see <a href="https://ecoenchants.polymart.org">EcoEnchants extension examples.</a>
+ * @see <a href="https://auxilor.polymart.org">Extension examples.</a>
  */
-public abstract class Extension {
+public abstract class Extension implements PluginLike {
     /**
      * The {@link EcoPlugin} that this extension is for.
      */
@@ -103,4 +107,14 @@ public abstract class Extension {
         Validate.notNull(metadata, "Metadata cannot be null!");
         return this.metadata.version();
     }
+
+    @Override
+    public File getDataFolder() {
+        return this.plugin.getDataFolder();
+    }
+
+    @Override
+    public ConfigHandler getConfigHandler() {
+        return this.plugin.getConfigHandler();
+    }
 }

eco-api/src/main/java/com/willfp/eco/core/fast/FastItemStack.java

@@ -107,7 +107,7 @@ public interface FastItemStack {
      * @param itemStack The ItemStack.
      * @return The FastItemStack.
      */
-    static FastItemStack wrap(final ItemStack itemStack) {
+    static FastItemStack wrap(@Nullable final ItemStack itemStack) {
         return Eco.getHandler().createFastItemStack(Objects.requireNonNullElseGet(itemStack, () -> new ItemStack(Material.AIR)));
     }
 }

eco-api/src/main/java/com/willfp/eco/core/integrations/afk/AFKManager.java

@@ -0,0 +1,44 @@
+package com.willfp.eco.core.integrations.afk;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Class to handle afk integrations.
+ */
+@UtilityClass
+public class AFKManager {
+    /**
+     * A set of all registered integrations.
+     */
+    private final Set<AFKWrapper> registered = new HashSet<>();
+
+    /**
+     * Register a new integration.
+     *
+     * @param integration The integration to register.
+     */
+    public void register(@NotNull final AFKWrapper integration) {
+        registered.add(integration);
+    }
+
+    /**
+     * Get if a player is afk.
+     *
+     * @param player The player.
+     * @return If afk.
+     */
+    public boolean isAfk(@NotNull final Player player) {
+        for (AFKWrapper afkWrapper : registered) {
+            if (afkWrapper.isAfk(player)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/afk/AFKWrapper.java

@@ -0,0 +1,18 @@
+package com.willfp.eco.core.integrations.afk;
+
+import com.willfp.eco.core.integrations.Integration;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Wrapper class for afk integrations.
+ */
+public interface AFKWrapper extends Integration {
+    /**
+     * Get if a player is afk.
+     *
+     * @param player The player.
+     * @return If afk.
+     */
+    boolean isAfk(@NotNull Player player);
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/antigrief/AntigriefManager.java

@@ -29,6 +29,16 @@ public class AntigriefManager {
         registered.add(antigrief);
     }
 
+    /**
+     * Unregister an AntiGrief/Land Management integration.
+     *
+     * @param antigrief The integration to unregister.
+     */
+    public void unregister(@NotNull final AntigriefWrapper antigrief) {
+        registered.removeIf(it -> it.getPluginName().equalsIgnoreCase(antigrief.getPluginName()));
+        registered.remove(antigrief);
+    }
+
     /**
      * Can player break block.
      *

eco-api/src/main/java/com/willfp/eco/core/integrations/economy/EconomyManager.java

@@ -0,0 +1,99 @@
+package com.willfp.eco.core.integrations.economy;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Class to handle economy.
+ */
+@UtilityClass
+public class EconomyManager {
+    /**
+     * A set of all registered integrations.
+     */
+    private final Set<EconomyWrapper> registered = new HashSet<>();
+
+    /**
+     * Register a new integration.
+     *
+     * @param integration The integration to register.
+     */
+    public void register(@NotNull final EconomyWrapper integration) {
+        registered.add(integration);
+    }
+
+    /**
+     * Get if any economy registrations are registered.
+     *
+     * @return If any economy.
+     */
+    public boolean hasRegistrations() {
+        return !registered.isEmpty();
+    }
+
+    /**
+     * Get if a player has a certain amount.
+     *
+     * @param player The player.
+     * @param amount The amount.
+     * @return If the player has the amount.
+     */
+    public boolean hasAmount(@NotNull final OfflinePlayer player,
+                             final double amount) {
+        for (EconomyWrapper wrapper : registered) {
+            return wrapper.hasAmount(player, amount);
+        }
+
+        return false;
+    }
+
+    /**
+     * Give money to a player.
+     *
+     * @param player The player.
+     * @param amount The amount to give.
+     * @return If the transaction was a success.
+     */
+    public boolean giveMoney(@NotNull final OfflinePlayer player,
+                             final double amount) {
+        for (EconomyWrapper wrapper : registered) {
+            return wrapper.giveMoney(player, amount);
+        }
+
+        return false;
+    }
+
+    /**
+     * Remove money from a player.
+     *
+     * @param player The player.
+     * @param amount The amount to remove.
+     * @return If the transaction was a success.
+     */
+    public boolean removeMoney(@NotNull final OfflinePlayer player,
+                               final double amount) {
+        for (EconomyWrapper wrapper : registered) {
+            return wrapper.removeMoney(player, amount);
+        }
+
+        return false;
+    }
+
+    /**
+     * Get the balance of a player.
+     *
+     * @param player The player.
+     * @return The balance.
+     */
+    public double getBalance(@NotNull final OfflinePlayer player) {
+        for (EconomyWrapper wrapper : registered) {
+            return wrapper.getBalance(player);
+        }
+
+        return 0;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/economy/EconomyWrapper.java

@@ -0,0 +1,48 @@
+package com.willfp.eco.core.integrations.economy;
+
+import com.willfp.eco.core.integrations.Integration;
+import org.bukkit.OfflinePlayer;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Wrapper class for economy integrations.
+ */
+public interface EconomyWrapper extends Integration {
+    /**
+     * Get if a player has a certain amount.
+     *
+     * @param player The player.
+     * @param amount The amount.
+     * @return If the player has the amount.
+     */
+    boolean hasAmount(@NotNull OfflinePlayer player,
+                      double amount);
+
+    /**
+     * Give money to a player.
+     *
+     * @param player The player.
+     * @param amount The amount to give.
+     * @return If the transaction was a success.
+     */
+    boolean giveMoney(@NotNull OfflinePlayer player,
+                      double amount);
+
+    /**
+     * Remove money from a player.
+     *
+     * @param player The player.
+     * @param amount The amount to remove.
+     * @return If the transaction was a success.
+     */
+    boolean removeMoney(@NotNull OfflinePlayer player,
+                        double amount);
+
+    /**
+     * Get the balance of a player.
+     *
+     * @param player The player.
+     * @return The balance.
+     */
+    double getBalance(@NotNull OfflinePlayer player);
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/hologram/DummyHologram.java

@@ -0,0 +1,20 @@
+package com.willfp.eco.core.integrations.hologram;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+/**
+ * Dummy hologram, created if no integrations are present on the server.
+ */
+class DummyHologram implements Hologram {
+    @Override
+    public void remove() {
+        // Do nothing.
+    }
+
+    @Override
+    public void setContents(@NotNull final List<String> contents) {
+        // Do nothing.
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/hologram/Hologram.java

@@ -0,0 +1,22 @@
+package com.willfp.eco.core.integrations.hologram;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+/**
+ * Wrapper class for plugin-specific holograms.
+ */
+public interface Hologram {
+    /**
+     * Remove the hologram.
+     */
+    void remove();
+
+    /**
+     * Set the hologram contents.
+     *
+     * @param contents The contents.
+     */
+    void setContents(@NotNull List<String> contents);
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/hologram/HologramManager.java

@@ -0,0 +1,45 @@
+package com.willfp.eco.core.integrations.hologram;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.Location;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Class to handle hologram integrations.
+ */
+@UtilityClass
+public class HologramManager {
+    /**
+     * A set of all registered integrations.
+     */
+    private final Set<HologramWrapper> registered = new HashSet<>();
+
+    /**
+     * Register a new integration.
+     *
+     * @param integration The integration to register.
+     */
+    public void register(@NotNull final HologramWrapper integration) {
+        registered.add(integration);
+    }
+
+    /**
+     * Create hologram.
+     *
+     * @param location The location.
+     * @param contents The contents for the hologram.
+     * @return The hologram.
+     */
+    public Hologram createHologram(@NotNull final Location location,
+                                   @NotNull final List<String> contents) {
+        for (HologramWrapper wrapper : registered) {
+            return wrapper.createHologram(location, contents);
+        }
+
+        return new DummyHologram();
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/hologram/HologramWrapper.java

@@ -0,0 +1,22 @@
+package com.willfp.eco.core.integrations.hologram;
+
+import com.willfp.eco.core.integrations.Integration;
+import org.bukkit.Location;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+/**
+ * Wrapper class for hologram integrations.
+ */
+public interface HologramWrapper extends Integration {
+    /**
+     * Create hologram.
+     *
+     * @param location The location.
+     * @param contents The contents for the hologram.
+     * @return The hologram.
+     */
+    Hologram createHologram(@NotNull Location location,
+                            @NotNull List<String> contents);
+}

eco-api/src/main/java/com/willfp/eco/core/integrations/mcmmo/McmmoWrapper.java

@@ -1,5 +1,6 @@
 package com.willfp.eco.core.integrations.mcmmo;
 
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.block.Block;
 import org.bukkit.event.Event;
 import org.jetbrains.annotations.NotNull;
@@ -7,7 +8,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * Wrapper class for mcmmo integrations.
  */
-public interface McmmoWrapper {
+public interface McmmoWrapper extends Integration {
     /**
      * Get bonus drop count of block.
      *

eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderManager.java

@@ -8,9 +8,7 @@ import org.jetbrains.annotations.Nullable;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
-import java.util.Optional;
 import java.util.Set;
-import java.util.concurrent.atomic.AtomicReference;
 
 /**
  * Class to handle placeholder integrations.

eco-api/src/main/java/com/willfp/eco/core/items/CustomItem.java

@@ -2,7 +2,6 @@ package com.willfp.eco.core.items;
 
 import com.willfp.eco.core.Eco;
 import lombok.Getter;
-import org.apache.commons.lang.Validate;
 import org.bukkit.Bukkit;
 import org.bukkit.NamespacedKey;
 import org.bukkit.inventory.ItemStack;
@@ -12,7 +11,7 @@ import org.jetbrains.annotations.Nullable;
 import java.util.function.Predicate;
 
 /**
- * A custom item has 3 components:
+ * A custom item has 3 components.
  *
  * <ul>
  *     <li>The key to identify it</li>

eco-api/src/main/java/com/willfp/eco/core/items/Items.java

@@ -1,11 +1,13 @@
 package com.willfp.eco.core.items;
 
 import com.willfp.eco.core.items.args.LookupArgParser;
+import com.willfp.eco.core.items.provider.ItemProvider;
 import com.willfp.eco.core.recipe.parts.EmptyTestableItem;
 import com.willfp.eco.core.recipe.parts.MaterialTestableItem;
 import com.willfp.eco.core.recipe.parts.ModifiedTestableItem;
 import com.willfp.eco.core.recipe.parts.TestableStack;
 import com.willfp.eco.util.NamespacedKeyUtils;
+import com.willfp.eco.util.NumberUtils;
 import lombok.experimental.UtilityClass;
 import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
@@ -16,12 +18,12 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.Predicate;
+import java.util.stream.Collectors;
 
 /**
  * Class to manage all custom and vanilla items.
@@ -31,7 +33,12 @@ public final class Items {
     /**
      * All recipe parts.
      */
-    private static final Map<NamespacedKey, CustomItem> REGISTRY = new ConcurrentHashMap<>();
+    private static final Map<NamespacedKey, TestableItem> REGISTRY = new ConcurrentHashMap<>();
+
+    /**
+     * All item providers.
+     */
+    private static final Map<String, ItemProvider> PROVIDERS = new ConcurrentHashMap<>();
 
     /**
      * All recipe parts.
@@ -42,11 +49,20 @@ public final class Items {
      * Register a new custom item.
      *
      * @param key  The key of the item.
-     * @param part The item.
+     * @param item The item.
      */
     public void registerCustomItem(@NotNull final NamespacedKey key,
-                                   @NotNull final CustomItem part) {
-        REGISTRY.put(key, part);
+                                   @NotNull final TestableItem item) {
+        REGISTRY.put(key, item);
+    }
+
+    /**
+     * Register a new item provider.
+     *
+     * @param provider The provider.
+     */
+    public void registerItemProvider(@NotNull final ItemProvider provider) {
+        PROVIDERS.put(provider.getNamespace(), provider);
     }
 
     /**
@@ -123,7 +139,20 @@ public final class Items {
         }
 
         if (split.length == 2) {
-            CustomItem part = REGISTRY.get(NamespacedKeyUtils.create(split[0], split[1]));
+            String namespace = split[0];
+            String keyID = split[1];
+            NamespacedKey namespacedKey = NamespacedKeyUtils.create(namespace, keyID);
+
+            TestableItem part = REGISTRY.get(namespacedKey);
+
+            if (part == null && PROVIDERS.containsKey(namespace)) {
+                ItemProvider provider = PROVIDERS.get(namespace);
+                item = provider.provideForKey(keyID);
+                if (item instanceof EmptyTestableItem || item == null) {
+                    return new EmptyTestableItem();
+                }
+                registerCustomItem(namespacedKey, item);
+            }
 
             /*
             Legacy id:amount format
@@ -146,7 +175,7 @@ public final class Items {
         This has been superseded by namespace:id amount
          */
         if (split.length == 3) {
-            CustomItem part = REGISTRY.get(NamespacedKeyUtils.create(split[0], split[1]));
+            TestableItem part = REGISTRY.get(NamespacedKeyUtils.create(split[0], split[1]));
             if (part == null) {
                 return new EmptyTestableItem();
             }
@@ -215,7 +244,7 @@ public final class Items {
      * @return If is recipe.
      */
     public boolean isCustomItem(@NotNull final ItemStack itemStack) {
-        for (CustomItem item : REGISTRY.values()) {
+        for (TestableItem item : REGISTRY.values()) {
             if (item.matches(itemStack)) {
                 return true;
             }
@@ -231,9 +260,9 @@ public final class Items {
      */
     @Nullable
     public CustomItem getCustomItem(@NotNull final ItemStack itemStack) {
-        for (CustomItem item : REGISTRY.values()) {
+        for (TestableItem item : REGISTRY.values()) {
             if (item.matches(itemStack)) {
-                return item;
+                return getOrWrap(item);
             }
         }
         return null;
@@ -245,6 +274,27 @@ public final class Items {
      * @return A set of all items.
      */
     public Set<CustomItem> getCustomItems() {
-        return new HashSet<>(REGISTRY.values());
+        return REGISTRY.values().stream().map(Items::getOrWrap).collect(Collectors.toSet());
+    }
+
+    /**
+     * Return a CustomItem instance for a given TestableItem.
+     * <p>
+     * Used internally since 6.10.0 when the registration moved from {@link CustomItem}
+     * to {@link TestableItem} for added flexibility.
+     *
+     * @param item The item.
+     * @return The CustomItem.
+     */
+    public CustomItem getOrWrap(@NotNull final TestableItem item) {
+        if (item instanceof CustomItem) {
+            return (CustomItem) item;
+        } else {
+            return new CustomItem(
+                    NamespacedKeyUtils.createEcoKey("wrapped_" + NumberUtils.randInt(0, 100000)),
+                    item::matches,
+                    item.getItem()
+            );
+        }
     }
 }

eco-api/src/main/java/com/willfp/eco/core/items/args/TextureArgParser.java

@@ -49,7 +49,7 @@ public class TextureArgParser implements LookupArgParser {
 
             assert testMeta != null;
 
-            if (testMeta instanceof SkullMeta skullMeta && finalSkullTexture != null) {
+            if (testMeta instanceof SkullMeta skullMeta) {
                 return finalSkullTexture.equalsIgnoreCase(SkullUtils.getSkullTexture(skullMeta));
             }
 

eco-api/src/main/java/com/willfp/eco/core/items/provider/ItemProvider.java

@@ -0,0 +1,40 @@
+package com.willfp.eco.core.items.provider;
+
+import com.willfp.eco.core.items.TestableItem;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Item providers are call-site registrations for items. In other words,
+ * they only register their items when a request is made. This is marginally
+ * slower, however it is required for certain plugins, and fixes bugs related to
+ * loading orders.
+ *
+ * @see TestableItem
+ */
+public abstract class ItemProvider {
+    /**
+     * The namespace.
+     */
+    @Getter
+    private final String namespace;
+
+    /**
+     * Create a new ItemProvider for a specific namespace.
+     *
+     * @param namespace The namespace.
+     */
+    protected ItemProvider(@NotNull final String namespace) {
+        this.namespace = namespace;
+    }
+
+    /**
+     * Provide a TestableItem for a given key.
+     *
+     * @param key The item ID.
+     * @return The TestableItem, or null if not found.
+     */
+    @Nullable
+    public abstract TestableItem provideForKey(@NotNull String key);
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/parts/ModifiedTestableItem.java

@@ -2,7 +2,6 @@ package com.willfp.eco.core.recipe.parts;
 
 import com.willfp.eco.core.items.TestableItem;
 import lombok.Getter;
-import org.apache.commons.lang.Validate;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;

eco-api/src/main/java/com/willfp/eco/core/web/Paste.java

@@ -4,6 +4,7 @@ import com.willfp.eco.core.Eco;
 import lombok.Getter;
 import org.jetbrains.annotations.NotNull;
 
+import javax.net.ssl.HttpsURLConnection;
 import java.io.BufferedReader;
 import java.io.DataOutputStream;
 import java.io.IOException;
@@ -11,7 +12,6 @@ import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.net.URLDecoder;
-import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.util.function.Consumer;
 
@@ -40,45 +40,42 @@ public class Paste {
      * <p>
      * Runs asynchronously to avoid hangups.
      *
-     * @param responseHandler The consumer to accept the response token.
+     * @param callback The consumer to accept the response token.
      */
-    public void getHastebinToken(@NotNull final Consumer<String> responseHandler) {
+    public void getHastebinToken(@NotNull final Consumer<String> callback) {
         Eco.getHandler().getEcoPlugin().getScheduler().runAsync(() -> {
             try {
-                String url = "https://hastebin.com/documents";
-                URL obj = new URL(url);
-                HttpURLConnection con = (HttpURLConnection) obj.openConnection();
+                byte[] postData = contents.getBytes(StandardCharsets.UTF_8);
+                int postDataLength = postData.length;
 
-                con.setRequestMethod("POST");
-                con.setRequestProperty("Content-Type", "application/json");
+                String requestURL = "https://hastebin.com/documents";
+                URL url = new URL(requestURL);
+                HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
+                conn.setDoOutput(true);
+                conn.setInstanceFollowRedirects(false);
+                conn.setRequestMethod("POST");
+                conn.setRequestProperty("User-Agent", "eco-Hastebin");
+                conn.setRequestProperty("Content-Length", Integer.toString(postDataLength));
+                conn.setUseCaches(false);
 
-                con.setDoOutput(true);
-                DataOutputStream wr = new DataOutputStream(con.getOutputStream());
-                wr.writeBytes(URLEncoder.encode(contents, StandardCharsets.UTF_8));
-                wr.flush();
-                wr.close();
+                String response;
+                DataOutputStream wr;
 
-                BufferedReader iny = new BufferedReader(
-                        new InputStreamReader(con.getInputStream()));
-                String output;
-                StringBuilder responseBuilder = new StringBuilder();
+                wr = new DataOutputStream(conn.getOutputStream());
+                wr.write(postData);
+                BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
+                response = reader.readLine();
 
-                while ((output = iny.readLine()) != null) {
-                    responseBuilder.append(output);
+                assert response != null;
+
+                if (response.contains("\"key\"")) {
+                    response = response.substring(response.indexOf(":") + 2, response.length() - 2);
+
+                    callback.accept(response);
                 }
-                iny.close();
-
-                String responseString = responseBuilder.toString();
-
-                responseString = responseString.replace("{\"key\":\"", "");
-                responseString = responseString.replace("\"}", "");
-
-                responseHandler.accept(responseString);
             } catch (IOException e) {
-                responseHandler.accept(e.getMessage());
+                callback.accept(e.getMessage());
             }
-
-            responseHandler.accept("");
         });
     }
 
@@ -96,7 +93,7 @@ public class Paste {
             conn.setRequestMethod("GET");
             try (var reader = new BufferedReader(
                     new InputStreamReader(conn.getInputStream()))) {
-                for (String line; (line = reader.readLine()) != null; ) {
+                for (String line; (line = reader.readLine()) != null;) {
                     result.append(line);
                 }
             }

eco-api/src/main/java/com/willfp/eco/core/web/UpdateChecker.java

@@ -26,9 +26,9 @@ public class UpdateChecker extends PluginDependent<EcoPlugin> {
     /**
      * Get the latest version of the plugin.
      *
-     * @param consumer The process to run after checking.
+     * @param callback The process to run after checking.
      */
-    public void getVersion(@NotNull final Consumer<? super String> consumer) {
+    public void getVersion(@NotNull final Consumer<? super String> callback) {
         this.getPlugin().getScheduler().runAsync(() -> {
             try {
                 InputStream inputStream = new URL(
@@ -37,7 +37,7 @@ public class UpdateChecker extends PluginDependent<EcoPlugin> {
                 Scanner scanner = new Scanner(inputStream);
 
                 if (scanner.hasNext()) {
-                    consumer.accept(scanner.next());
+                    callback.accept(scanner.next());
                 }
             } catch (IOException e) {
                 this.getPlugin().getLogger().warning("Failed to check for updates: " + e.getMessage());

eco-api/src/main/java/com/willfp/eco/util/BlockUtils.java

@@ -2,12 +2,14 @@ package com.willfp.eco.util;
 
 import lombok.experimental.UtilityClass;
 import org.apache.commons.lang.Validate;
+import org.bukkit.Chunk;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.entity.Player;
+import org.bukkit.persistence.PersistentDataType;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
@@ -92,6 +94,21 @@ public class BlockUtils {
         blockBreakConsumer.accept(player, block);
     }
 
+    /**
+     * Get if a block was placed by a player.
+     *
+     * @param block The block.
+     * @return If placed by a player.
+     */
+    public boolean isPlayerPlaced(@NotNull final Block block) {
+        Chunk chunk = block.getChunk();
+
+        return chunk.getPersistentDataContainer().has(
+                NamespacedKeyUtils.createEcoKey(Integer.toString(block.getLocation().hashCode(), 16)),
+                PersistentDataType.INTEGER
+        );
+    }
+
     /**
      * Initialize the block break function.
      *

eco-api/src/main/java/com/willfp/eco/util/ListUtils.java

@@ -5,7 +5,9 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * Utilities / API methods for lists.
@@ -21,8 +23,8 @@ public class ListUtils {
      * @return The list, filled will null objects.
      */
     @NotNull
-    public <@Nullable T> List<List<T>> create2DList(final int rows,
-                                                    final int columns) {
+    public static <@Nullable T> List<List<T>> create2DList(final int rows,
+                                                           final int columns) {
         List<List<T>> list = new ArrayList<>(rows);
         while (list.size() < rows) {
             List<T> row = new ArrayList<>(columns);
@@ -34,4 +36,25 @@ public class ListUtils {
 
         return list;
     }
+
+    /**
+     * Convert a list potentially containing duplicates to a map where the value is the frequency of the key.
+     *
+     * @param list The list.
+     * @param <T>  The type parameter of the list.
+     * @return The frequency map.
+     */
+    @NotNull
+    public static <T> Map<T, Integer> listToFrequencyMap(@NotNull final List<T> list) {
+        Map<T, Integer> frequencyMap = new HashMap<>();
+        for (T object : list) {
+            if (frequencyMap.containsKey(object)) {
+                frequencyMap.put(object, frequencyMap.get(object) + 1);
+            } else {
+                frequencyMap.put(object, 1);
+            }
+        }
+
+        return frequencyMap;
+    }
 }

eco-api/src/main/java/com/willfp/eco/util/NumberUtils.java

@@ -1,6 +1,5 @@
 package com.willfp.eco.util;
 
-import lombok.experimental.NonFinal;
 import lombok.experimental.UtilityClass;
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/util/PlayerUtils.java

@@ -1,8 +1,14 @@
 package com.willfp.eco.util;
 
 import com.willfp.eco.core.Eco;
+import com.willfp.eco.core.Prerequisite;
+import com.willfp.eco.core.data.PlayerProfile;
+import com.willfp.eco.core.data.keys.PersistentDataKey;
+import com.willfp.eco.core.data.keys.PersistentDataKeyType;
 import lombok.experimental.UtilityClass;
 import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.platform.bukkit.BukkitAudiences;
+import org.bukkit.OfflinePlayer;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
@@ -12,6 +18,15 @@ import org.jetbrains.annotations.NotNull;
  */
 @UtilityClass
 public class PlayerUtils {
+    /**
+     * The data key for saved player names.
+     */
+    private static final PersistentDataKey<String> PLAYER_NAME_KEY = new PersistentDataKey<>(
+            NamespacedKeyUtils.createEcoKey("player_name"),
+            PersistentDataKeyType.STRING,
+            "Unknown Player"
+    );
+
     /**
      * Get the audience from a player.
      *
@@ -20,7 +35,21 @@ public class PlayerUtils {
      */
     @NotNull
     public Audience getAudience(@NotNull final Player player) {
-        return Eco.getHandler().getAdventure().player(player);
+        BukkitAudiences adventure = Eco.getHandler().getAdventure();
+
+        if (Prerequisite.HAS_PAPER.isMet()) {
+            if (player instanceof Audience) {
+                return (Audience) player;
+            } else {
+                return Audience.empty();
+            }
+        } else {
+            if (adventure == null) {
+                return Audience.empty();
+            } else {
+                return adventure.player(player);
+            }
+        }
     }
 
     /**
@@ -31,6 +60,46 @@ public class PlayerUtils {
      */
     @NotNull
     public Audience getAudience(@NotNull final CommandSender sender) {
-        return Eco.getHandler().getAdventure().sender(sender);
+        BukkitAudiences adventure = Eco.getHandler().getAdventure();
+
+        if (Prerequisite.HAS_PAPER.isMet()) {
+            if (sender instanceof Audience) {
+                return (Audience) sender;
+            } else {
+                return Audience.empty();
+            }
+        } else {
+            if (adventure == null) {
+                return Audience.empty();
+            } else {
+                return adventure.sender(sender);
+            }
+        }
+    }
+
+    /**
+     * Get saved display name for an offline player.
+     *
+     * @param player The player.
+     * @return The player name.
+     */
+    public String getSavedDisplayName(@NotNull final OfflinePlayer player) {
+        PlayerProfile profile = PlayerProfile.load(player);
+
+        if (player instanceof Player onlinePlayer) {
+            profile.write(PLAYER_NAME_KEY, onlinePlayer.getDisplayName());
+        }
+
+        return profile.read(PLAYER_NAME_KEY);
+    }
+
+    /**
+     * Update the saved display name for a player.
+     *
+     * @param player The player.
+     */
+    public void updateSavedDisplayName(@NotNull final Player player) {
+        PlayerProfile profile = PlayerProfile.load(player);
+        profile.write(PLAYER_NAME_KEY, player.getDisplayName());
     }
 }

eco-api/src/main/java/com/willfp/eco/util/PotionUtils.java

@@ -0,0 +1,47 @@
+package com.willfp.eco.util;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.potion.PotionData;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Utilities / API methods for potions.
+ */
+@UtilityClass
+public class PotionUtils {
+    /**
+     * Get the duration (in ticks) for potion data.
+     *
+     * @param data The data.
+     * @return The duration.
+     */
+    public int getDuration(@NotNull final PotionData data) {
+        if (data.isExtended()) {
+            return switch (data.getType()) {
+                case INSTANT_DAMAGE, INSTANT_HEAL: yield 0;
+                case POISON, REGEN: yield 1800;
+                case SLOW_FALLING, WEAKNESS, SLOWNESS: yield 4800;
+                case TURTLE_MASTER: yield 800;
+                default: yield 9600;
+            };
+        }
+
+        if (data.isUpgraded()) {
+            return switch (data.getType()) {
+                case INSTANT_DAMAGE, INSTANT_HEAL: yield 0;
+                case POISON, REGEN: yield 420;
+                case SLOW_FALLING, WEAKNESS, SLOWNESS: yield 440;
+                case TURTLE_MASTER: yield 400;
+                default: yield 1800;
+            };
+        }
+
+        return switch (data.getType()) {
+            case INSTANT_DAMAGE, INSTANT_HEAL: yield 0;
+            case POISON, REGEN: yield 900;
+            case SLOW_FALLING, WEAKNESS, SLOWNESS: yield 400;
+            case TURTLE_MASTER: yield 1800;
+            default: yield 3600;
+        };
+    }
+}

eco-api/src/main/java/com/willfp/eco/util/ServerUtils.java

@@ -0,0 +1,48 @@
+package com.willfp.eco.util;
+
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang.Validate;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Supplier;
+
+/**
+ * Utilities / API methods for the server.
+ */
+@UtilityClass
+public class ServerUtils {
+    /**
+     * The TPS supplier.
+     */
+    private Supplier<Double> tpsSupplier = null;
+
+    /**
+     * Get the current server TPS.
+     *
+     * @return The TPS.
+     */
+    public double getTps() {
+        Validate.notNull(tpsSupplier, "Not initialized!");
+
+        double tps = tpsSupplier.get();
+
+        if (tps > 20) {
+            return 20;
+        } else {
+            return tps;
+        }
+    }
+
+    /**
+     * Initialize the tps supplier function.
+     *
+     * @param function The function.
+     */
+    @ApiStatus.Internal
+    public void initialize(@NotNull final Supplier<Double> function) {
+        Validate.isTrue(tpsSupplier == null, "Already initialized!");
+
+        tpsSupplier = function;
+    }
+}

eco-api/src/main/java/com/willfp/eco/util/StringUtils.java

@@ -1,6 +1,8 @@
 package com.willfp.eco.util;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import com.willfp.eco.core.Prerequisite;
 import com.willfp.eco.core.integrations.placeholder.PlaceholderManager;
 import lombok.experimental.UtilityClass;
 import net.kyori.adventure.text.Component;
@@ -14,15 +16,21 @@ import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.awt.*;
+import java.awt.Color;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
+import static net.md_5.bungee.api.ChatColor.BOLD;
 import static net.md_5.bungee.api.ChatColor.COLOR_CHAR;
+import static net.md_5.bungee.api.ChatColor.ITALIC;
+import static net.md_5.bungee.api.ChatColor.MAGIC;
+import static net.md_5.bungee.api.ChatColor.STRIKETHROUGH;
+import static net.md_5.bungee.api.ChatColor.UNDERLINE;
 
 /**
  * Utilities / API methods for strings.
@@ -60,6 +68,22 @@ public class StringUtils {
             .hexColors()
             .build();
 
+    /**
+     * Color map.
+     */
+    private static final Map<String, ChatColor> COLOR_MAP = new ImmutableMap.Builder<String, ChatColor>()
+            .put("&l", BOLD)
+            .put("&o", ITALIC)
+            .put("&n", UNDERLINE)
+            .put("&m", STRIKETHROUGH)
+            .put("&k", MAGIC)
+            .put("§l", BOLD)
+            .put("§o", ITALIC)
+            .put("§n", UNDERLINE)
+            .put("§m", STRIKETHROUGH)
+            .put("§k", MAGIC)
+            .build();
+
     /**
      * Format a list of strings.
      * <p>
@@ -250,10 +274,12 @@ public class StringUtils {
         if (option == FormatOption.WITH_PLACEHOLDERS) {
             processedMessage = PlaceholderManager.translatePlaceholders(processedMessage, player);
         }
-        processedMessage = translateGradients(processedMessage);
-        processedMessage = translateMiniMessage(processedMessage);
-        processedMessage = translateHexColorCodes(processedMessage);
         processedMessage = ChatColor.translateAlternateColorCodes('&', processedMessage);
+        processedMessage = translateGradients(processedMessage);
+        processedMessage = translateHexColorCodes(processedMessage);
+        if (Prerequisite.HAS_PAPER.isMet()) {
+            processedMessage = translateMiniMessage(processedMessage);
+        }
         return processedMessage;
     }
 
@@ -290,26 +316,12 @@ public class StringUtils {
                                            @NotNull final Color end) {
         String processedString = string;
         List<ChatColor> modifiers = new ArrayList<>();
-        if (processedString.contains("&l")) {
-            modifiers.add(ChatColor.BOLD);
+        for (Map.Entry<String, ChatColor> entry : COLOR_MAP.entrySet()) {
+            if (processedString.contains(entry.getKey())) {
+                modifiers.add(entry.getValue());
+            }
+            processedString = processedString.replace(entry.getKey(), "");
         }
-        if (processedString.contains("&o")) {
-            modifiers.add(ChatColor.ITALIC);
-        }
-        if (processedString.contains("&n")) {
-            modifiers.add(ChatColor.UNDERLINE);
-        }
-        if (processedString.contains("&m")) {
-            modifiers.add(ChatColor.STRIKETHROUGH);
-        }
-        if (processedString.contains("&k")) {
-            modifiers.add(ChatColor.MAGIC);
-        }
-        processedString = processedString.replace("&l", "");
-        processedString = processedString.replace("&o", "");
-        processedString = processedString.replace("&n", "");
-        processedString = processedString.replace("&k", "");
-        processedString = processedString.replace("&m", "");
 
         StringBuilder stringBuilder = new StringBuilder();
         ChatColor[] colors = getGradientColors(start, end, processedString.length());

eco-core/build.gradle

@@ -4,7 +4,7 @@ buildscript {
     }
 
     dependencies {
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.21"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.31"
     }
 }
 
@@ -18,4 +18,12 @@ subprojects {
         compileOnly project(":eco-api")
         compileOnly 'org.jetbrains.kotlin:kotlin-stdlib:1.5.31'
     }
+
+    compileKotlin {
+        kotlinOptions {
+            jvmTarget = "16"
+        }
+        targetCompatibility = JavaVersion.VERSION_16
+        sourceCompatibility = JavaVersion.VERSION_16
+    }
 }

eco-core/core-backend/build.gradle

@@ -7,4 +7,5 @@ dependencies {
     compileOnly 'org.reflections:reflections:0.9.12'
     compileOnly 'net.kyori:adventure-text-minimessage:4.1.0-SNAPSHOT'
     compileOnly 'net.kyori:adventure-platform-bukkit:4.0.0'
+    compileOnly 'com.google.guava:guava:31.0.1-jre'
 }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/EcoConfigFactory.kt

@@ -1,6 +1,6 @@
 package com.willfp.eco.internal.config
 
-import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.PluginLike
 import com.willfp.eco.core.config.interfaces.Config
 import com.willfp.eco.core.config.interfaces.JSONConfig
 import com.willfp.eco.core.config.wrapper.ConfigFactory
@@ -15,7 +15,7 @@ import org.bukkit.configuration.file.YamlConfiguration
 class EcoConfigFactory : ConfigFactory {
     override fun createUpdatableYamlConfig(
         configName: String,
-        plugin: EcoPlugin,
+        plugin: PluginLike,
         subDirectoryPath: String,
         source: Class<*>,
         removeUnused: Boolean,
@@ -33,7 +33,7 @@ class EcoConfigFactory : ConfigFactory {
 
     override fun createUpdatableJSONConfig(
         configName: String,
-        plugin: EcoPlugin,
+        plugin: PluginLike,
         subDirectoryPath: String,
         source: Class<*>,
         removeUnused: Boolean,
@@ -51,7 +51,7 @@ class EcoConfigFactory : ConfigFactory {
 
     override fun createLoadableJSONConfig(
         configName: String,
-        plugin: EcoPlugin,
+        plugin: PluginLike,
         subDirectoryPath: String,
         source: Class<*>
     ): JSONConfig {
@@ -65,7 +65,7 @@ class EcoConfigFactory : ConfigFactory {
 
     override fun createLoadableYamlConfig(
         configName: String,
-        plugin: EcoPlugin,
+        plugin: PluginLike,
         subDirectoryPath: String,
         source: Class<*>
     ): Config {

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/json/EcoJSONConfigWrapper.kt

@@ -4,7 +4,6 @@ import com.google.gson.Gson
 import com.google.gson.GsonBuilder
 import com.willfp.eco.core.config.interfaces.JSONConfig
 import com.willfp.eco.util.StringUtils
-import org.apache.commons.lang.Validate
 import java.util.*
 import java.util.concurrent.ConcurrentHashMap
 
@@ -124,8 +123,7 @@ open class EcoJSONConfigWrapper : JSONConfig {
 
     override fun getSubsection(path: String): JSONConfig {
         val subsection = getSubsectionOrNull(path)
-        Validate.notNull(subsection)
-        return subsection!!
+        return subsection ?: EcoJSONConfigSection(emptyMap())
     }
 
     override fun getSubsectionOrNull(path: String): JSONConfig? {

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/json/EcoLoadableJSONConfig.kt

@@ -1,16 +1,20 @@
 package com.willfp.eco.internal.config.json
 
-import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.PluginLike
 import com.willfp.eco.core.config.interfaces.LoadableConfig
-import org.jetbrains.annotations.NotNull
-import java.io.*
+import java.io.File
+import java.io.FileNotFoundException
+import java.io.FileOutputStream
+import java.io.FileReader
+import java.io.IOException
+import java.io.OutputStream
 import java.nio.file.Files
 import java.nio.file.StandardOpenOption
 
 @Suppress("UNCHECKED_CAST")
 open class EcoLoadableJSONConfig(
     configName: String,
-    private val plugin: EcoPlugin,
+    private val plugin: PluginLike,
     private val subDirectoryPath: String,
     val source: Class<*>
 ) : EcoJSONConfigWrapper(), LoadableConfig {
@@ -77,7 +81,7 @@ open class EcoLoadableJSONConfig(
     }
 
     init {
-        val directory: File = File(this.plugin.dataFolder, subDirectoryPath)
+        val directory = File(this.plugin.dataFolder, subDirectoryPath)
         if (!directory.exists()) {
             directory.mkdirs()
         }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/json/EcoUpdatableJSONConfig.kt

@@ -1,6 +1,6 @@
 package com.willfp.eco.internal.config.json
 
-import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.PluginLike
 import org.bukkit.configuration.InvalidConfigurationException
 import org.bukkit.configuration.file.YamlConfiguration
 import java.io.BufferedReader
@@ -10,7 +10,7 @@ import java.nio.charset.StandardCharsets
 
 open class EcoUpdatableJSONConfig(
     configName: String,
-    plugin: EcoPlugin,
+    plugin: PluginLike,
     subDirectoryPath: String,
     source: Class<*>,
     private val removeUnused: Boolean,

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/updating/EcoConfigHandler.kt

@@ -11,7 +11,6 @@ import com.willfp.eco.internal.config.yaml.EcoLoadableYamlConfig
 import com.willfp.eco.internal.config.yaml.EcoUpdatableYamlConfig
 import org.reflections.Reflections
 import org.reflections.scanners.MethodAnnotationsScanner
-import java.lang.reflect.Modifier
 
 class EcoConfigHandler(
     private val plugin: EcoPlugin
@@ -25,10 +24,6 @@ class EcoConfigHandler(
 
     override fun callUpdate() {
         for (method in reflections.getMethodsAnnotatedWith(ConfigUpdater::class.java)) {
-            if (!Modifier.isStatic(method.modifiers)) {
-                throw InvalidUpdateMethodException("Update method in ${method.declaringClass.name} must be static.")
-            }
-
             try {
                 when (method.parameterCount) {
                     0 -> method.invoke(null)

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/yaml/EcoLoadableYamlConfig.kt

@@ -1,6 +1,6 @@
 package com.willfp.eco.internal.config.yaml
 
-import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.PluginLike
 import com.willfp.eco.core.config.interfaces.LoadableConfig
 import com.willfp.eco.core.config.interfaces.WrappedYamlConfiguration
 import org.bukkit.configuration.InvalidConfigurationException
@@ -12,7 +12,7 @@ import java.io.OutputStream
 
 open class EcoLoadableYamlConfig(
     configName: String,
-    private val plugin: EcoPlugin,
+    private val plugin: PluginLike,
     private val subDirectoryPath: String,
     val source: Class<*>
 ) : EcoYamlConfigWrapper<YamlConfiguration>(), WrappedYamlConfiguration, LoadableConfig {

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/yaml/EcoUpdatableYamlConfig.kt

@@ -1,6 +1,6 @@
 package com.willfp.eco.internal.config.yaml
 
-import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.PluginLike
 import org.bukkit.configuration.InvalidConfigurationException
 import org.bukkit.configuration.file.YamlConfiguration
 import java.io.BufferedReader
@@ -10,7 +10,7 @@ import java.nio.charset.StandardCharsets
 
 class EcoUpdatableYamlConfig(
     configName: String,
-    plugin: EcoPlugin,
+    plugin: PluginLike,
     subDirectoryPath: String,
     source: Class<*>,
     private val removeUnused: Boolean,
@@ -27,9 +27,9 @@ class EcoUpdatableYamlConfig(
             if (newConfig.getKeys(true) == this.handle.getKeys(true)) {
                 return
             }
-            newConfig.getKeys(true).forEach { key: String ->
+            newConfig.getKeys(true).forEach { key ->
                 if (!this.handle.getKeys(true).contains(key)) {
-                    if (updateBlacklist.stream().noneMatch { s: String -> key.contains(s) }) {
+                    if (updateBlacklist.stream().noneMatch { key.contains(it) }) {
                         this.handle.set(key, newConfig[key])
                     }
                 }
@@ -67,7 +67,7 @@ class EcoUpdatableYamlConfig(
         }
 
     init {
-        this.updateBlacklist.removeIf { obj: String -> obj.isEmpty() }
+        this.updateBlacklist.removeIf { it.isEmpty() }
         plugin.configHandler.addConfig(this)
         update()
     }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/config/yaml/EcoYamlConfigWrapper.kt

@@ -2,7 +2,6 @@ package com.willfp.eco.internal.config.yaml
 
 import com.willfp.eco.core.config.interfaces.Config
 import com.willfp.eco.util.StringUtils
-import org.apache.commons.lang.Validate
 import org.bukkit.configuration.ConfigurationSection
 import org.bukkit.configuration.file.YamlConfiguration
 import java.io.StringReader
@@ -52,8 +51,7 @@ open class EcoYamlConfigWrapper<T : ConfigurationSection> : Config {
 
     override fun getSubsection(path: String): Config {
         val subsection = getSubsectionOrNull(path)
-        Validate.notNull(subsection)
-        return subsection!!
+        return subsection ?: EcoYamlConfigSection(YamlConfiguration())
     }
 
     override fun getSubsectionOrNull(path: String): Config? {

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/data/EcoPlayerProfile.kt

@@ -0,0 +1,17 @@
+package com.willfp.eco.internal.data
+
+import com.willfp.eco.core.data.PlayerProfile
+import com.willfp.eco.core.data.keys.PersistentDataKey
+
+class EcoPlayerProfile(
+    val data: MutableMap<PersistentDataKey<*>, Any>
+) : PlayerProfile {
+    override fun <T : Any> write(key: PersistentDataKey<T>, value: T) {
+        this.data[key] = value
+    }
+
+    override fun <T : Any> read(key: PersistentDataKey<T>): T {
+        @Suppress("UNCHECKED_CAST")
+        return this.data[key] as T? ?: key.defaultValue
+    }
+}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/display/EcoDisplayHandler.kt

@@ -1,5 +1,6 @@
 package com.willfp.eco.internal.display
 
+import com.google.common.util.concurrent.ThreadFactoryBuilder
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.display.Display
 import com.willfp.eco.core.display.DisplayHandler
@@ -10,16 +11,11 @@ import org.bukkit.NamespacedKey
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 import org.bukkit.persistence.PersistentDataType
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
 
 class EcoDisplayHandler(plugin: EcoPlugin) : DisplayHandler {
-    /**
-     * All registered display modules.
-     */
     private val registeredModules = mutableMapOf<DisplayPriority, MutableList<DisplayModule>>()
-
-    /**
-     * NamespacedKey for finalizing.
-     */
     private val finalizeKey: NamespacedKey = plugin.namespacedKeyFactory.create("finalized")
 
     init {

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/drops/impl/EcoDropQueue.kt

@@ -12,10 +12,9 @@ import org.bukkit.event.player.PlayerExpChangeEvent
 import org.bukkit.inventory.ItemStack
 import org.bukkit.util.Vector
 
-open class EcoDropQueue(player: Player) : InternalDropQueue {
+open class EcoDropQueue(val player: Player) : InternalDropQueue {
     val items = mutableListOf<ItemStack>()
     var xp: Int = 0
-    val player: Player
     var loc: Location
     var hasTelekinesis = false
 
@@ -79,7 +78,6 @@ open class EcoDropQueue(player: Player) : InternalDropQueue {
     }
 
     init {
-        this.player = player
         loc = player.location
     }
 }

eco-core/core-nms/v1_16_R3/build.gradle

@@ -3,4 +3,6 @@ version rootProject.version
 
 dependencies {
     compileOnly 'org.spigotmc:spigot:1.16.5-R0.1-SNAPSHOT'
+    compileOnly 'net.kyori:adventure-api:4.9.1'
+    compileOnly 'net.kyori:adventure-text-serializer-gson:4.8.1'
 }

eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/eco/proxy/v1_16_R3/ChatComponent.java

@@ -1,118 +0,0 @@
-package com.willfp.eco.proxy.v1_16_R3;
-
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonPrimitive;
-import com.mojang.brigadier.exceptions.CommandSyntaxException;
-import com.willfp.eco.core.display.Display;
-import com.willfp.eco.proxy.ChatComponentProxy;
-import net.minecraft.server.v1_16_R3.ChatBaseComponent;
-import net.minecraft.server.v1_16_R3.ChatHoverable;
-import net.minecraft.server.v1_16_R3.ChatMessage;
-import net.minecraft.server.v1_16_R3.ChatModifier;
-import net.minecraft.server.v1_16_R3.IChatBaseComponent;
-import net.minecraft.server.v1_16_R3.MojangsonParser;
-import org.bukkit.Material;
-import org.bukkit.craftbukkit.v1_16_R3.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Arrays;
-
-public final class ChatComponent implements ChatComponentProxy {
-    @Override
-    public Object modifyComponent(@NotNull final Object obj,
-                                  @NotNull final Player player) {
-        if (!(obj instanceof IChatBaseComponent chatComponent)) {
-            return obj;
-        }
-
-        for (IChatBaseComponent iChatBaseComponent : chatComponent) {
-            if (iChatBaseComponent == null) {
-                continue;
-            }
-
-            modifyBaseComponent(iChatBaseComponent, player);
-        }
-
-        return chatComponent;
-    }
-
-    private void modifyBaseComponent(@NotNull final IChatBaseComponent component,
-                                     @NotNull final Player player) {
-        for (IChatBaseComponent sibling : component.getSiblings()) {
-            if (sibling == null) {
-                continue;
-            }
-
-            modifyBaseComponent(sibling, player);
-        }
-        if (component instanceof ChatMessage) {
-            Arrays.stream(((ChatMessage) component).getArgs())
-                    .filter(o -> o instanceof IChatBaseComponent)
-                    .map(o -> (IChatBaseComponent) o)
-                    .forEach(o -> this.modifyBaseComponent(o, player));
-        }
-
-        ChatHoverable hoverable = component.getChatModifier().getHoverEvent();
-
-        if (hoverable == null) {
-            return;
-        }
-
-        JsonObject jsonObject = hoverable.b();
-        JsonElement json = hoverable.b().get("contents");
-        if (json.getAsJsonObject().get("id") == null) {
-            return;
-        }
-        if (json.getAsJsonObject().get("tag") == null) {
-            return;
-        }
-        String id = json.getAsJsonObject().get("id").toString();
-        String tag = json.getAsJsonObject().get("tag").toString();
-        ItemStack itemStack = getFromTag(tag, id);
-
-        Display.displayAndFinalize(itemStack, player);
-
-        json.getAsJsonObject().remove("tag");
-        String newTag = toJson(itemStack);
-        json.getAsJsonObject().add("tag", new JsonPrimitive(newTag));
-
-        jsonObject.remove("contents");
-        jsonObject.add("contents", json);
-        ChatHoverable newHoverable = ChatHoverable.a(jsonObject);
-        ChatModifier modifier = component.getChatModifier();
-        modifier = modifier.setChatHoverable(newHoverable);
-
-        ((ChatBaseComponent) component).setChatModifier(modifier);
-    }
-
-    private static ItemStack getFromTag(@NotNull final String jsonTag,
-                                        @NotNull final String id) {
-        String processedId = id;
-        String processedJsonTag = jsonTag;
-        processedId = processedId.replace("minecraft:", "");
-        processedId = processedId.toUpperCase();
-        processedId = processedId.replace("\"", "");
-        processedJsonTag = processedJsonTag.substring(1, processedJsonTag.length() - 1);
-        processedJsonTag = processedJsonTag.replace("id:", "\"id\":");
-        processedJsonTag = processedJsonTag.replace("\\", "");
-        Material material = Material.getMaterial(processedId);
-
-        assert material != null;
-        ItemStack itemStack = new ItemStack(material);
-        net.minecraft.server.v1_16_R3.ItemStack nmsStack = CraftItemStack.asNMSCopy(itemStack);
-
-        try {
-            nmsStack.setTag(MojangsonParser.parse(processedJsonTag));
-        } catch (CommandSyntaxException e) {
-            e.printStackTrace();
-        }
-        return CraftItemStack.asBukkitCopy(nmsStack);
-    }
-
-    private static String toJson(@NotNull final ItemStack itemStack) {
-        return CraftItemStack.asNMSCopy(itemStack).getOrCreateTag().toString();
-    }
-}

eco-core/core-nms/v1_16_R3/src/main/java/com/willfp/eco/proxy/v1_16_R3/FastItemStackUtils.java

@@ -1,43 +0,0 @@
-package com.willfp.eco.proxy.v1_16_R3;
-
-import org.bukkit.craftbukkit.libs.org.apache.commons.lang3.Validate;
-import org.bukkit.craftbukkit.v1_16_R3.inventory.CraftItemStack;
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-
-import java.lang.reflect.Field;
-
-public class FastItemStackUtils {
-    private static final Field FIELD;
-
-    public static net.minecraft.server.v1_16_R3.ItemStack getNMSStack(@NotNull final ItemStack itemStack) {
-        if (!(itemStack instanceof CraftItemStack)) {
-            return CraftItemStack.asNMSCopy(itemStack);
-        } else {
-            try {
-                net.minecraft.server.v1_16_R3.ItemStack nms = (net.minecraft.server.v1_16_R3.ItemStack) FIELD.get(itemStack);
-                return nms == null ? CraftItemStack.asNMSCopy(itemStack) : nms;
-            } catch (ReflectiveOperationException e) {
-                e.printStackTrace();
-                return net.minecraft.server.v1_16_R3.ItemStack.b;
-            }
-        }
-    }
-
-    static {
-        Field temp = null;
-
-        try {
-            Field handleField = CraftItemStack.class.getDeclaredField("handle");
-            handleField.setAccessible(true);
-            temp = handleField;
-        } catch (ReflectiveOperationException e) {
-            e.printStackTrace();
-        }
-
-        assert temp != null;
-        Validate.notNull(temp, "Error occurred in initialization!");
-
-        FIELD = temp;
-    }
-}

eco-core/core-nms/v1_16_R3/src/main/kotlin/com/willfp/eco/proxy/v1_16_R3/ChatComponent.kt

@@ -0,0 +1,93 @@
+package com.willfp.eco.proxy.v1_16_R3
+
+import com.willfp.eco.core.display.Display
+import com.willfp.eco.proxy.ChatComponentProxy
+import net.kyori.adventure.nbt.api.BinaryTagHolder
+import net.kyori.adventure.text.BuildableComponent
+import net.kyori.adventure.text.Component
+import net.kyori.adventure.text.TranslatableComponent
+import net.kyori.adventure.text.event.HoverEvent
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
+import net.minecraft.server.v1_16_R3.IChatBaseComponent
+import net.minecraft.server.v1_16_R3.MojangsonParser
+import org.bukkit.Material
+import org.bukkit.craftbukkit.v1_16_R3.inventory.CraftItemStack
+import org.bukkit.entity.Player
+
+@Suppress("UNCHECKED_CAST")
+class ChatComponent : ChatComponentProxy {
+    private val gsonComponentSerializer = GsonComponentSerializer.gson()
+
+    override fun modifyComponent(obj: Any, player: Player): Any {
+        if (obj !is IChatBaseComponent) {
+            return obj
+        }
+
+        val component = gsonComponentSerializer.deserialize(
+            IChatBaseComponent.ChatSerializer.a(
+                obj
+            )
+        ).asComponent() as BuildableComponent<*, *>
+
+        val newComponent = modifyBaseComponent(component, player)
+
+        return IChatBaseComponent.ChatSerializer.a(
+            gsonComponentSerializer.serialize(newComponent.asComponent())
+        ) ?: obj
+    }
+
+    private fun modifyBaseComponent(baseComponent: Component, player: Player): Component {
+        var component = baseComponent
+
+        if (component is TranslatableComponent) {
+            val args = mutableListOf<Component>()
+            for (arg in component.args()) {
+                args.add(modifyBaseComponent(arg, player))
+            }
+            component = component.args(args)
+        }
+
+        val children = mutableListOf<Component>()
+        for (child in component.children()) {
+            children.add(modifyBaseComponent(child, player))
+        }
+        component = component.children(children)
+
+        val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
+
+        val showItem = hoverEvent.value()
+
+        if (showItem !is HoverEvent.ShowItem) {
+            return component
+        }
+
+        val newShowItem = showItem.nbt(
+            BinaryTagHolder.of(
+                CraftItemStack.asNMSCopy(
+                    Display.display(
+                        CraftItemStack.asBukkitCopy(
+                            CraftItemStack.asNMSCopy(
+                                org.bukkit.inventory.ItemStack(
+                                    Material.matchMaterial(
+                                        showItem.item()
+                                            .toString()
+                                    ) ?: return component,
+                                    showItem.count()
+                                )
+                            ).apply {
+                                this.tag = MojangsonParser.parse(
+                                    showItem.nbt()?.string() ?: return component
+                                ) ?: return component
+                            }
+                        ),
+                        player
+                    )
+                ).orCreateTag.toString()
+            )
+        )
+
+        val newHover = hoverEvent.value(newShowItem)
+        val style = component.style().hoverEvent(newHover)
+        return component.style(style)
+    }
+}

eco-core/core-nms/v1_16_R3/src/main/kotlin/com/willfp/eco/proxy/v1_16_R3/Skull.kt

@@ -36,8 +36,9 @@ class Skull : SkullProxy {
             profile = meta.javaClass.getDeclaredField("profile")
             profile.isAccessible = true
         }
-        val profile = profile[meta] as GameProfile?
-        val property = profile?.properties?.get("textures") as Property?
-        return property?.value
+        val profile = profile[meta] as GameProfile? ?: return null
+        val properties = profile.properties ?: return null
+        val prop = properties["textures"] ?: return null
+        return prop.toMutableList().firstOrNull()?.name
     }
 }

eco-core/core-nms/v1_16_R3/src/main/kotlin/com/willfp/eco/proxy/v1_16_R3/TPS.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.proxy.v1_16_R3
+
+import com.willfp.eco.proxy.TPSProxy
+import org.bukkit.Bukkit
+import org.bukkit.craftbukkit.v1_16_R3.CraftServer
+
+class TPS : TPSProxy {
+    override fun getTPS(): Double {
+        return (Bukkit.getServer() as CraftServer).handle.server.recentTps[0]
+    }
+}

eco-core/core-nms/v1_16_R3/src/main/kotlin/com/willfp/eco/proxy/v1_16_R3/fast/FastItemStackUtils.kt

@@ -0,0 +1,17 @@
+package com.willfp.eco.proxy.v1_16_R3.fast
+
+import org.bukkit.craftbukkit.v1_16_R3.inventory.CraftItemStack
+import org.bukkit.inventory.ItemStack
+import java.lang.reflect.Field
+
+private val field: Field = CraftItemStack::class.java.getDeclaredField("handle").apply {
+    isAccessible = true
+}
+
+fun ItemStack.getNMSStack(): net.minecraft.server.v1_16_R3.ItemStack {
+    return if (this !is CraftItemStack) {
+        CraftItemStack.asNMSCopy(this)
+    } else {
+        field[this] as net.minecraft.server.v1_16_R3.ItemStack? ?: CraftItemStack.asNMSCopy(this)
+    }
+}

eco-core/core-nms/v1_16_R3/src/main/kotlin/com/willfp/eco/proxy/v1_16_R3/fast/NMSFastItemStack.kt

@@ -1,7 +1,6 @@
 package com.willfp.eco.proxy.v1_16_R3.fast
 
 import com.willfp.eco.internal.fast.EcoFastItemStack
-import com.willfp.eco.proxy.v1_16_R3.FastItemStackUtils
 import com.willfp.eco.util.StringUtils
 import net.minecraft.server.v1_16_R3.*
 import org.bukkit.craftbukkit.v1_16_R3.inventory.CraftItemStack
@@ -12,7 +11,7 @@ import org.bukkit.inventory.ItemFlag
 import kotlin.experimental.and
 
 class NMSFastItemStack(itemStack: org.bukkit.inventory.ItemStack) : EcoFastItemStack<ItemStack>(
-    FastItemStackUtils.getNMSStack(itemStack), itemStack
+    itemStack.getNMSStack(), itemStack
 ) {
     private var loreCache: List<String>? = null
     override fun getEnchantmentsOnItem(checkStored: Boolean): Map<Enchantment, Int> {
@@ -151,6 +150,18 @@ class NMSFastItemStack(itemStack: org.bukkit.inventory.ItemStack) : EcoFastItemS
         handle.repairCost = cost
     }
 
+    override fun equals(other: Any?): Boolean {
+        if (other !is NMSFastItemStack) {
+            return false
+        }
+
+        return other.hashCode() == this.hashCode()
+    }
+
+    override fun hashCode(): Int {
+        return handle.tag.hashCode() * 31 + Item.getId(handle.item)
+    }
+
     private fun apply() {
         if (bukkit !is CraftItemStack) {
             bukkit.itemMeta = CraftItemStack.asCraftMirror(handle).itemMeta

eco-core/core-nms/v1_17_R1/build.gradle

@@ -7,6 +7,8 @@ version rootProject.version
 
 dependencies {
     compileOnly 'org.spigotmc:spigot:1.17.1-R0.1-SNAPSHOT:remapped-mojang'
+    compileOnly 'net.kyori:adventure-api:4.9.1'
+    compileOnly 'net.kyori:adventure-text-serializer-gson:4.8.1'
 }
 
 specialGradle {

eco-core/core-nms/v1_17_R1/src/main/java/com/willfp/eco/proxy/v1_17_R1/ChatComponent.java

@@ -1,118 +0,0 @@
-package com.willfp.eco.proxy.v1_17_R1;
-
-import com.google.gson.JsonElement;
-import com.google.gson.JsonObject;
-import com.google.gson.JsonPrimitive;
-import com.mojang.brigadier.exceptions.CommandSyntaxException;
-import com.willfp.eco.core.display.Display;
-import net.minecraft.nbt.TagParser;
-import net.minecraft.network.chat.BaseComponent;
-import net.minecraft.network.chat.Component;
-import net.minecraft.network.chat.HoverEvent;
-import net.minecraft.network.chat.Style;
-import net.minecraft.network.chat.TranslatableComponent;
-import org.bukkit.Material;
-import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-import com.willfp.eco.proxy.ChatComponentProxy;
-
-public final class ChatComponent implements ChatComponentProxy {
-    @Override
-    public Object modifyComponent(@NotNull final Object obj,
-                                  @NotNull final Player player) {
-        if (!(obj instanceof Component chatComponent)) {
-            return obj;
-        }
-
-        for (Component iChatBaseComponent : chatComponent) {
-            if (iChatBaseComponent == null) {
-                continue;
-            }
-
-            modifyBaseComponent(iChatBaseComponent, player);
-        }
-
-        return chatComponent;
-    }
-
-    private void modifyBaseComponent(@NotNull final Component component,
-                                     @NotNull final Player player) {
-        for (Component sibling : component.getSiblings()) {
-            if (sibling == null) {
-                continue;
-            }
-
-            modifyBaseComponent(sibling, player);
-        }
-
-        if (component instanceof TranslatableComponent baseComponent) {
-            for (Object arg : baseComponent.getArgs()) {
-                if (arg instanceof Component) {
-                    modifyBaseComponent((Component) arg, player);
-                }
-            }
-        }
-
-        HoverEvent hoverable = component.getStyle().getHoverEvent();
-
-        if (hoverable == null) {
-            return;
-        }
-
-        JsonObject jsonObject = hoverable.serialize();
-        JsonElement json = jsonObject.get("contents");
-        if (json.getAsJsonObject().get("id") == null) {
-            return;
-        }
-        if (json.getAsJsonObject().get("tag") == null) {
-            return;
-        }
-        String id = json.getAsJsonObject().get("id").toString();
-        String tag = json.getAsJsonObject().get("tag").toString();
-        ItemStack itemStack = getFromTag(tag, id);
-
-        Display.displayAndFinalize(itemStack, player);
-
-        json.getAsJsonObject().remove("tag");
-        String newTag = toJson(itemStack);
-        json.getAsJsonObject().add("tag", new JsonPrimitive(newTag));
-
-        jsonObject.remove("contents");
-        jsonObject.add("contents", json);
-        HoverEvent newHoverable = HoverEvent.deserialize(jsonObject);
-        Style modifier = component.getStyle();
-        modifier = modifier.withHoverEvent(newHoverable);
-
-        ((BaseComponent) component).setStyle(modifier);
-    }
-
-    private static ItemStack getFromTag(@NotNull final String jsonTag,
-                                        @NotNull final String id) {
-        String processedId = id;
-        String processedJsonTag = jsonTag;
-        processedId = processedId.replace("minecraft:", "");
-        processedId = processedId.toUpperCase();
-        processedId = processedId.replace("\"", "");
-        processedJsonTag = processedJsonTag.substring(1, processedJsonTag.length() - 1);
-        processedJsonTag = processedJsonTag.replace("id:", "\"id\":");
-        processedJsonTag = processedJsonTag.replace("\\", "");
-        Material material = Material.getMaterial(processedId);
-
-        assert material != null;
-        ItemStack itemStack = new ItemStack(material);
-        net.minecraft.world.item.ItemStack nmsStack = CraftItemStack.asNMSCopy(itemStack);
-
-        try {
-            nmsStack.setTag(TagParser.parseTag(processedJsonTag));
-        } catch (CommandSyntaxException e) {
-            e.printStackTrace();
-        }
-        return CraftItemStack.asBukkitCopy(nmsStack);
-    }
-
-    private static String toJson(@NotNull final ItemStack itemStack) {
-        return CraftItemStack.asNMSCopy(itemStack).getOrCreateTag().toString();
-    }
-}

eco-core/core-nms/v1_17_R1/src/main/java/com/willfp/eco/proxy/v1_17_R1/FastItemStackUtils.java

@@ -1,45 +0,0 @@
-package com.willfp.eco.proxy.v1_17_R1;
-
-import lombok.experimental.UtilityClass;
-import org.bukkit.craftbukkit.libs.org.apache.commons.lang3.Validate;
-import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack;
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-
-import java.lang.reflect.Field;
-
-@UtilityClass
-public class FastItemStackUtils {
-    private static final Field FIELD;
-
-    public static net.minecraft.world.item.ItemStack getNMSStack(@NotNull final ItemStack itemStack) {
-        if (!(itemStack instanceof CraftItemStack)) {
-            return CraftItemStack.asNMSCopy(itemStack);
-        } else {
-            try {
-                net.minecraft.world.item.ItemStack nms = (net.minecraft.world.item.ItemStack) FIELD.get(itemStack);
-                return nms == null ? CraftItemStack.asNMSCopy(itemStack) : nms;
-            } catch (ReflectiveOperationException e) {
-                e.printStackTrace();
-                return net.minecraft.world.item.ItemStack.EMPTY;
-            }
-        }
-    }
-
-    static {
-        Field temp = null;
-
-        try {
-            Field handleField = CraftItemStack.class.getDeclaredField("handle");
-            handleField.setAccessible(true);
-            temp = handleField;
-        } catch (ReflectiveOperationException e) {
-            e.printStackTrace();
-        }
-
-        assert temp != null;
-        Validate.notNull(temp, "Error occurred in initialization!");
-
-        FIELD = temp;
-    }
-}

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/proxy/v1_17_R1/ChatComponent.kt

@@ -0,0 +1,93 @@
+package com.willfp.eco.proxy.v1_17_R1
+
+import com.willfp.eco.core.display.Display
+import com.willfp.eco.proxy.ChatComponentProxy
+import net.kyori.adventure.nbt.api.BinaryTagHolder
+import net.kyori.adventure.text.BuildableComponent
+import net.kyori.adventure.text.Component
+import net.kyori.adventure.text.TranslatableComponent
+import net.kyori.adventure.text.event.HoverEvent
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
+import net.minecraft.nbt.TagParser
+import org.bukkit.Material
+import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack
+import org.bukkit.entity.Player
+import org.bukkit.inventory.ItemStack
+
+@Suppress("UNCHECKED_CAST")
+class ChatComponent : ChatComponentProxy {
+    private val gsonComponentSerializer = GsonComponentSerializer.gson()
+
+    override fun modifyComponent(obj: Any, player: Player): Any {
+        if (obj !is net.minecraft.network.chat.Component) {
+            return obj
+        }
+
+        val component = gsonComponentSerializer.deserialize(
+            net.minecraft.network.chat.Component.Serializer.toJson(
+                obj
+            )
+        ).asComponent() as BuildableComponent<*, *>
+
+        val newComponent = modifyBaseComponent(component, player)
+
+        return net.minecraft.network.chat.Component.Serializer.fromJson(
+            gsonComponentSerializer.serialize(newComponent.asComponent())
+        ) ?: obj
+    }
+
+    private fun modifyBaseComponent(baseComponent: Component, player: Player): Component {
+        var component = baseComponent
+
+        if (component is TranslatableComponent) {
+            val args = mutableListOf<Component>()
+            for (arg in component.args()) {
+                args.add(modifyBaseComponent(arg, player))
+            }
+            component = component.args(args)
+        }
+
+        val children = mutableListOf<Component>()
+        for (child in component.children()) {
+            children.add(modifyBaseComponent(child, player))
+        }
+        component = component.children(children)
+
+        val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
+
+        val showItem = hoverEvent.value()
+
+        if (showItem !is HoverEvent.ShowItem) {
+            return component
+        }
+
+        val newShowItem = showItem.nbt(
+            BinaryTagHolder.of(
+                CraftItemStack.asNMSCopy(
+                    Display.display(
+                        CraftItemStack.asBukkitCopy(
+                            CraftItemStack.asNMSCopy(
+                                ItemStack(
+                                    Material.matchMaterial(
+                                        showItem.item()
+                                            .toString()
+                                    ) ?: return component,
+                                    showItem.count()
+                                )
+                            ).apply {
+                                this.tag = TagParser.parseTag(
+                                    showItem.nbt()?.string() ?: return component
+                                ) ?: return component
+                            }
+                        ),
+                        player
+                    )
+                ).orCreateTag.toString()
+            )
+        )
+
+        val newHover = hoverEvent.value(newShowItem)
+        val style = component.style().hoverEvent(newHover)
+        return component.style(style)
+    }
+}

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/proxy/v1_17_R1/Skull.kt

@@ -36,8 +36,9 @@ class Skull : SkullProxy {
             profile = meta.javaClass.getDeclaredField("profile")
             profile.isAccessible = true
         }
-        val profile = profile[meta] as GameProfile?
-        val property = profile?.properties?.get("textures") as Property?
-        return property?.value
+        val profile = profile[meta] as GameProfile? ?: return null
+        val properties = profile.properties ?: return null
+        val prop = properties["textures"] ?: return null
+        return prop.toMutableList().firstOrNull()?.name
     }
 }

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/proxy/v1_17_R1/TPS.kt

@@ -0,0 +1,11 @@
+package com.willfp.eco.proxy.v1_17_R1
+
+import com.willfp.eco.proxy.TPSProxy
+import org.bukkit.Bukkit
+import org.bukkit.craftbukkit.v1_17_R1.CraftServer
+
+class TPS : TPSProxy {
+    override fun getTPS(): Double {
+        return (Bukkit.getServer() as CraftServer).handle.server.recentTps[0]
+    }
+}

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/proxy/v1_17_R1/fast/FastItemStackUtils.kt

@@ -0,0 +1,17 @@
+package com.willfp.eco.proxy.v1_17_R1.fast
+
+import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack
+import org.bukkit.inventory.ItemStack
+import java.lang.reflect.Field
+
+private val field: Field = CraftItemStack::class.java.getDeclaredField("handle").apply {
+    isAccessible = true
+}
+
+fun ItemStack.getNMSStack(): net.minecraft.world.item.ItemStack {
+    return if (this !is CraftItemStack) {
+        CraftItemStack.asNMSCopy(this)
+    } else {
+        field[this] as net.minecraft.world.item.ItemStack? ?: CraftItemStack.asNMSCopy(this)
+    }
+}

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/proxy/v1_17_R1/fast/NMSFastItemStack.kt

@@ -1,12 +1,12 @@
 package com.willfp.eco.proxy.v1_17_R1.fast
 
 import com.willfp.eco.internal.fast.EcoFastItemStack
-import com.willfp.eco.proxy.v1_17_R1.FastItemStackUtils
 import com.willfp.eco.util.StringUtils
 import net.minecraft.nbt.CompoundTag
 import net.minecraft.nbt.ListTag
 import net.minecraft.nbt.StringTag
 import net.minecraft.world.item.EnchantedBookItem
+import net.minecraft.world.item.Item
 import net.minecraft.world.item.ItemStack
 import net.minecraft.world.item.Items
 import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack
@@ -17,7 +17,7 @@ import org.bukkit.inventory.ItemFlag
 import kotlin.experimental.and
 
 class NMSFastItemStack(itemStack: org.bukkit.inventory.ItemStack) : EcoFastItemStack<ItemStack>(
-    FastItemStackUtils.getNMSStack(itemStack), itemStack
+    itemStack.getNMSStack(), itemStack
 ) {
     private var loreCache: List<String>? = null
 
@@ -171,6 +171,18 @@ class NMSFastItemStack(itemStack: org.bukkit.inventory.ItemStack) : EcoFastItemS
         handle.setRepairCost(cost)
     }
 
+    override fun equals(other: Any?): Boolean {
+        if (other !is NMSFastItemStack) {
+            return false
+        }
+
+        return other.hashCode() == this.hashCode()
+    }
+
+    override fun hashCode(): Int {
+        return handle.tag.hashCode() * 31 + Item.getId(handle.item)
+    }
+
     private fun apply() {
         if (bukkit !is CraftItemStack) {
             bukkit.itemMeta = CraftItemStack.asCraftMirror(handle).itemMeta

eco-core/core-plugin/build.gradle

@@ -3,31 +3,43 @@ version rootProject.version
 
 dependencies {
     implementation 'org.bstats:bstats-bukkit:1.7'
-    implementation 'net.kyori:adventure-text-minimessage:4.1.0-SNAPSHOT'
-    implementation 'net.kyori:adventure-platform-bukkit:4.0.0'
-    compileOnly 'net.kyori:adventure-api:4.9.1'
-    compileOnly 'net.kyori:adventure-text-serializer-gson:4.8.1'
-    compileOnly 'net.kyori:adventure-text-serializer-legacy:4.8.1'
-    compileOnly 'org.apache.maven:maven-artifact:3.0.3'
-    compileOnly 'com.google.code.gson:gson:2.8.7'
+    implementation('net.kyori:adventure-text-minimessage:4.1.0-SNAPSHOT') {
+        exclude group: 'net.kyori', module: 'adventure-api'
+    }
+    compileOnly 'net.kyori:adventure-platform-bukkit:4.0.0'
+    compileOnly 'net.kyori:adventure-api:4.9.2'
+    compileOnly 'net.kyori:adventure-text-serializer-gson:4.9.2'
+    compileOnly 'net.kyori:adventure-text-serializer-legacy:4.9.2'
+    compileOnly 'org.apache.maven:maven-artifact:3.8.1'
+    compileOnly 'com.google.code.gson:gson:2.8.8'
     compileOnly 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'
     compileOnly project(":eco-core:core-proxy")
     compileOnly project(":eco-core:core-backend")
-    compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'
-    compileOnly 'com.sk89q.worldguard:worldguard-bukkit:7.0.4-SNAPSHOT'
+    compileOnly 'com.comphenix.protocol:ProtocolLib:4.7.1-SNAPSHOT'
+    compileOnly 'com.sk89q.worldguard:worldguard-bukkit:7.0.7-SNAPSHOT'
     compileOnly 'com.github.TechFortress:GriefPrevention:16.17.1'
     compileOnly 'com.massivecraft:Factions:1.6.9.5-U0.5.10'
-    compileOnly 'com.github.cryptomorin:kingdoms:1.10.14'
-    compileOnly 'com.github.TownyAdvanced:Towny:0.97.1.0'
-    compileOnly 'com.github.angeschossen:LandsAPI:4.7.3'
+    compileOnly 'com.github.cryptomorin:kingdoms:1.11.9'
+    compileOnly 'com.github.TownyAdvanced:Towny:0.97.2.6'
+    compileOnly 'com.github.angeschossen:LandsAPI:5.15.2'
     compileOnly 'fr.neatmonster:nocheatplus:3.16.1-SNAPSHOT'
     compileOnly 'com.github.jiangdashao:matrix-api-repo:317d4635fd'
-    compileOnly 'com.gmail.nossr50.mcMMO:mcMMO:2.1.157'
+    compileOnly 'com.gmail.nossr50.mcMMO:mcMMO:2.1.202'
     compileOnly 'me.clip:placeholderapi:2.10.10'
-    compileOnly 'com.willfp:Oraxen:e1f4003d8d'
+    compileOnly 'com.github.oraxen:oraxen:bd81ace154'
     compileOnly 'com.github.brcdev-minecraft:shopgui-api:2.2.0'
     compileOnly 'com.github.LoneDev6:API-ItemsAdder:2.4.7'
-    compileOnly 'me.arcaniax:HeadDatabase-API:1.2.0'
+    compileOnly 'com.arcaniax:HeadDatabase-API:1.3.0'
+    compileOnly 'org.jetbrains.exposed:exposed-core:0.35.1'
+    compileOnly 'org.jetbrains.exposed:exposed-dao:0.35.1'
+    compileOnly 'org.jetbrains.exposed:exposed-jdbc:0.35.1'
+    compileOnly 'mysql:mysql-connector-java:8.0.25'
+    compileOnly 'com.gmail.filoghost.holographicdisplays:holographicdisplays-api:2.4.0'
+    compileOnly 'net.essentialsx:EssentialsX:2.19.0'
+    compileOnly 'com.bgsoftware:SuperiorSkyblockAPI:latest'
+    compileOnly 'com.github.MilkBowl:VaultAPI:1.7'
+    compileOnly 'world.bentobox:bentobox:1.17.3-SNAPSHOT'
+    compileOnly 'com.google.guava:guava:31.0.1-jre'
 
     // CombatLogX V10 + NewbieHelper Expansion
     compileOnly 'com.SirBlobman.combatlogx:CombatLogX-API:10.0.0.0-SNAPSHOT'

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/eventlisteners/ArmorChangeEventListeners.java

@@ -1,42 +0,0 @@
-package com.willfp.eco.spigot.eventlisteners;
-
-import com.willfp.eco.core.EcoPlugin;
-import com.willfp.eco.core.PluginDependent;
-import com.willfp.eco.core.events.ArmorChangeEvent;
-import com.willfp.eco.core.events.ArmorEquipEvent;
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
-import org.bukkit.event.Listener;
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-@SuppressWarnings("deprecation")
-public class ArmorChangeEventListeners extends PluginDependent<EcoPlugin> implements Listener {
-    /**
-     * Pass an {@link EcoPlugin} in order to interface with it.
-     *
-     * @param plugin The plugin to manage.
-     */
-    public ArmorChangeEventListeners(@NotNull final EcoPlugin plugin) {
-        super(plugin);
-    }
-
-    @EventHandler
-    public void onArmorChange(@NotNull final ArmorEquipEvent event) {
-        Player player = event.getPlayer();
-
-        List<ItemStack> before = new ArrayList<>(Arrays.asList(player.getInventory().getArmorContents()));
-
-        this.getPlugin().getScheduler().runLater(() -> {
-            List<ItemStack> after = new ArrayList<>(Arrays.asList(player.getInventory().getArmorContents()));
-
-            ArmorChangeEvent armorChangeEvent = new ArmorChangeEvent(player, before, after);
-            Bukkit.getPluginManager().callEvent(armorChangeEvent);
-        }, 1);
-    }
-}

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/eventlisteners/ArmorListener.java

@@ -1,187 +0,0 @@
-package com.willfp.eco.spigot.eventlisteners;
-
-import com.willfp.eco.core.events.ArmorEquipEvent;
-import org.bukkit.Bukkit;
-import org.bukkit.Material;
-import org.bukkit.entity.Player;
-import org.bukkit.event.Event.Result;
-import org.bukkit.event.EventHandler;
-import org.bukkit.event.EventPriority;
-import org.bukkit.event.Listener;
-import org.bukkit.event.block.Action;
-import org.bukkit.event.entity.PlayerDeathEvent;
-import org.bukkit.event.inventory.ClickType;
-import org.bukkit.event.inventory.InventoryAction;
-import org.bukkit.event.inventory.InventoryClickEvent;
-import org.bukkit.event.inventory.InventoryDragEvent;
-import org.bukkit.event.inventory.InventoryType;
-import org.bukkit.event.inventory.InventoryType.SlotType;
-import org.bukkit.event.player.PlayerInteractEvent;
-import org.bukkit.event.player.PlayerItemBreakEvent;
-import org.bukkit.event.player.PlayerJoinEvent;
-import org.bukkit.event.player.PlayerRespawnEvent;
-import org.bukkit.inventory.ItemStack;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-@SuppressWarnings("deprecation")
-public class ArmorListener implements Listener {
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public final void inventoryClick(@NotNull final InventoryClickEvent event) {
-        boolean shift = false;
-        boolean numberkey = false;
-        if (event.isCancelled()) {
-            return;
-        }
-        if (event.getAction() == InventoryAction.NOTHING) {
-            return;
-        }
-        if (event.getClick().equals(ClickType.SHIFT_LEFT) || event.getClick().equals(ClickType.SHIFT_RIGHT)) {
-            shift = true;
-        }
-        if (event.getClick().equals(ClickType.NUMBER_KEY)) {
-            numberkey = true;
-        }
-        if (event.getSlotType() != SlotType.ARMOR && event.getSlotType() != SlotType.QUICKBAR && event.getSlotType() != SlotType.CONTAINER) {
-            return;
-        }
-        if (event.getClickedInventory() != null && !event.getClickedInventory().getType().equals(InventoryType.PLAYER)) {
-            return;
-        }
-        if (!event.getInventory().getType().equals(InventoryType.CRAFTING) && !event.getInventory().getType().equals(InventoryType.PLAYER)) {
-            return;
-        }
-        if (!(event.getWhoClicked() instanceof Player)) {
-            return;
-        }
-        ArmorType newArmorType = ArmorType.matchType(shift ? event.getCurrentItem() : event.getCursor());
-        if (!shift && newArmorType != null && event.getRawSlot() != newArmorType.getSlot()) {
-            // Used for drag and drop checking to make sure you aren't trying to place a helmet in the boots slot.
-            return;
-        }
-        if (shift) {
-            newArmorType = ArmorType.matchType(event.getCurrentItem());
-            if (newArmorType != null) {
-                boolean equipping = true;
-                if (event.getRawSlot() == newArmorType.getSlot()) {
-                    equipping = false;
-                }
-                if (newArmorType.equals(ArmorType.HELMET)
-                        && (equipping == isAirOrNull(event.getWhoClicked().getInventory().getHelmet()))
-                        || newArmorType.equals(ArmorType.CHESTPLATE)
-                        && (equipping == isAirOrNull(event.getWhoClicked().getInventory().getChestplate()))
-                        || newArmorType.equals(ArmorType.LEGGINGS)
-                        && (equipping == isAirOrNull(event.getWhoClicked().getInventory().getLeggings()))
-                        || newArmorType.equals(ArmorType.BOOTS)
-                        && (equipping == isAirOrNull(event.getWhoClicked().getInventory().getBoots()))) {
-                    ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(
-                            (Player) event.getWhoClicked()
-                    );
-                    Bukkit.getPluginManager().callEvent(armorEquipEvent);
-                }
-            }
-        } else {
-            if (numberkey) {
-                if (event.getClickedInventory().getType().equals(InventoryType.PLAYER)) {
-                    ItemStack hotbarItem = event.getClickedInventory().getItem(event.getHotbarButton());
-                    if (!isAirOrNull(hotbarItem)) {
-                        newArmorType = ArmorType.matchType(hotbarItem);
-                    } else {
-                        newArmorType = ArmorType.matchType(!isAirOrNull(event.getCurrentItem()) ? event.getCurrentItem() : event.getCursor());
-                    }
-                }
-            } else {
-                if (isAirOrNull(event.getCursor()) && !isAirOrNull(event.getCurrentItem())) {
-                    newArmorType = ArmorType.matchType(event.getCurrentItem());
-                }
-            }
-            if (newArmorType != null && event.getRawSlot() == newArmorType.getSlot()) {
-                ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent((Player) event.getWhoClicked());
-                Bukkit.getPluginManager().callEvent(armorEquipEvent);
-            }
-        }
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST)
-    public void playerInteractEvent(@NotNull final PlayerInteractEvent e) {
-        if (e.useItemInHand().equals(Result.DENY)) {
-            return;
-        }
-        if (e.getAction() == Action.PHYSICAL) {
-            return;
-        }
-        if (e.getAction() == Action.RIGHT_CLICK_AIR || e.getAction() == Action.RIGHT_CLICK_BLOCK) {
-            Player player = e.getPlayer();
-            if (!e.useInteractedBlock().equals(Result.DENY)) {
-                if (e.getClickedBlock() != null && e.getAction() == Action.RIGHT_CLICK_BLOCK && !player.isSneaking()) {
-                    Material mat = e.getClickedBlock().getType();
-                }
-            }
-            ArmorType newArmorType = ArmorType.matchType(e.getItem());
-            if (newArmorType != null) {
-                if (newArmorType.equals(ArmorType.HELMET)
-                        && isAirOrNull(e.getPlayer().getInventory().getHelmet())
-                        || newArmorType.equals(ArmorType.CHESTPLATE)
-                        && isAirOrNull(e.getPlayer().getInventory().getChestplate())
-                        || newArmorType.equals(ArmorType.LEGGINGS)
-                        && isAirOrNull(e.getPlayer().getInventory().getLeggings())
-                        || newArmorType.equals(ArmorType.BOOTS)
-                        && isAirOrNull(e.getPlayer().getInventory().getBoots())) {
-                    ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(e.getPlayer());
-                    Bukkit.getPluginManager().callEvent(armorEquipEvent);
-                }
-            }
-        }
-    }
-
-    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void inventoryDrag(@NotNull final InventoryDragEvent event) {
-        ArmorType type = ArmorType.matchType(event.getOldCursor());
-        if (event.getRawSlots().isEmpty()) {
-            return;
-        }
-        if (type != null && type.getSlot() == event.getRawSlots().stream().findFirst().orElse(0)) {
-            ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent((Player) event.getWhoClicked());
-            Bukkit.getPluginManager().callEvent(armorEquipEvent);
-        }
-    }
-
-    @EventHandler
-    public void playerJoinEvent(@NotNull final PlayerJoinEvent event) {
-        ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(event.getPlayer());
-        Bukkit.getPluginManager().callEvent(armorEquipEvent);
-    }
-
-    @EventHandler
-    public void playerRespawnEvent(@NotNull final PlayerRespawnEvent event) {
-        ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(event.getPlayer());
-        Bukkit.getPluginManager().callEvent(armorEquipEvent);
-    }
-
-    @EventHandler
-    public void itemBreakEvent(@NotNull final PlayerItemBreakEvent event) {
-        ArmorType type = ArmorType.matchType(event.getBrokenItem());
-        if (type != null) {
-            Player p = event.getPlayer();
-            ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(p);
-            Bukkit.getPluginManager().callEvent(armorEquipEvent);
-        }
-    }
-
-    @EventHandler
-    public void playerDeathEvent(@NotNull final PlayerDeathEvent event) {
-        Player p = event.getEntity();
-        if (event.getKeepInventory()) {
-            return;
-        }
-        for (ItemStack i : p.getInventory().getArmorContents()) {
-            if (!isAirOrNull(i)) {
-                Bukkit.getPluginManager().callEvent(new ArmorEquipEvent(p));
-            }
-        }
-    }
-
-    public static boolean isAirOrNull(@Nullable final ItemStack item) {
-        return item == null || item.getType().equals(Material.AIR);
-    }
-}

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/eventlisteners/ArmorType.java

@@ -1,38 +0,0 @@
-package com.willfp.eco.spigot.eventlisteners;
-
-import org.bukkit.inventory.ItemStack;
-
-public enum ArmorType {
-    HELMET(5),
-    CHESTPLATE(6),
-    LEGGINGS(7),
-    BOOTS(8);
-
-    private final int slot;
-
-    ArmorType(final int slot) {
-        this.slot = slot;
-    }
-
-    public static ArmorType matchType(final ItemStack itemStack) {
-        if (ArmorListener.isAirOrNull(itemStack)) {
-            return null;
-        }
-        String type = itemStack.getType().name();
-        if (type.endsWith("_HELMET") || type.endsWith("_SKULL") || type.endsWith("PLAYER_HEAD")) {
-            return HELMET;
-        } else if (type.endsWith("_CHESTPLATE") || type.endsWith("ELYTRA")) {
-            return CHESTPLATE;
-        } else if (type.endsWith("_LEGGINGS")) {
-            return LEGGINGS;
-        } else if (type.endsWith("_BOOTS")) {
-            return BOOTS;
-        } else {
-            return null;
-        }
-    }
-
-    public int getSlot() {
-        return slot;
-    }
-}

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/eventlisteners/DispenserArmorListener.java

@@ -1,21 +0,0 @@
-package com.willfp.eco.spigot.eventlisteners;
-
-import com.willfp.eco.core.events.ArmorEquipEvent;
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
-import org.bukkit.event.Listener;
-import org.bukkit.event.block.BlockDispenseArmorEvent;
-import org.jetbrains.annotations.NotNull;
-
-@SuppressWarnings("deprecation")
-public class DispenserArmorListener implements Listener {
-    @EventHandler
-    public void dispenseArmorEvent(@NotNull final BlockDispenseArmorEvent event) {
-        ArmorType type = ArmorType.matchType(event.getItem());
-        if (type != null && event.getTargetEntity() instanceof Player p) {
-            ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(p);
-            Bukkit.getPluginManager().callEvent(armorEquipEvent);
-        }
-    }
-}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/EcoHandler.kt

@@ -4,6 +4,8 @@ import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.Handler
 import com.willfp.eco.core.config.updating.ConfigHandler
 import com.willfp.eco.core.config.wrapper.ConfigFactory
+import com.willfp.eco.core.data.PlayerProfileHandler
+import com.willfp.eco.core.data.keys.KeyRegistry
 import com.willfp.eco.core.drops.DropQueueFactory
 import com.willfp.eco.core.events.EventManager
 import com.willfp.eco.core.extensions.ExtensionLoader
@@ -34,6 +36,8 @@ import com.willfp.eco.internal.proxy.EcoProxyFactory
 import com.willfp.eco.internal.requirement.EcoRequirementFactory
 import com.willfp.eco.internal.scheduling.EcoScheduler
 import com.willfp.eco.proxy.FastItemStackFactoryProxy
+import com.willfp.eco.spigot.data.EcoKeyRegistry
+import com.willfp.eco.spigot.data.EcoPlayerProfileHandler
 import com.willfp.eco.spigot.integrations.bstats.MetricHandler
 import net.kyori.adventure.platform.bukkit.BukkitAudiences
 import org.bukkit.inventory.ItemStack
@@ -43,7 +47,9 @@ import java.util.logging.Logger
 class EcoHandler : EcoSpigotPlugin(), Handler {
     private val cleaner = EcoCleaner()
     private val requirementFactory = EcoRequirementFactory()
-    private lateinit var adventure: BukkitAudiences
+    private var adventure: BukkitAudiences? = null
+    private val keyRegistry = EcoKeyRegistry(this)
+    private val playerProfileHandler = EcoPlayerProfileHandler(this)
 
     override fun createScheduler(plugin: EcoPlugin): Scheduler {
         return EcoScheduler(plugin)
@@ -129,10 +135,18 @@ class EcoHandler : EcoSpigotPlugin(), Handler {
         return requirementFactory
     }
 
-    override fun getAdventure(): BukkitAudiences {
+    override fun getAdventure(): BukkitAudiences? {
         return adventure
     }
 
+    override fun getKeyRegistry(): KeyRegistry {
+        return keyRegistry
+    }
+
+    override fun getPlayerProfileHandler(): PlayerProfileHandler {
+        return playerProfileHandler
+    }
+
     fun setAdventure(adventure: BukkitAudiences) {
         this.adventure = adventure
     }

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/EcoSpigotPlugin.kt

@@ -3,11 +3,15 @@ package com.willfp.eco.spigot
 import com.willfp.eco.core.AbstractPacketAdapter
 import com.willfp.eco.core.Eco
 import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.Prerequisite
 import com.willfp.eco.core.display.Display
 import com.willfp.eco.core.integrations.IntegrationLoader
+import com.willfp.eco.core.integrations.afk.AFKManager
 import com.willfp.eco.core.integrations.anticheat.AnticheatManager
 import com.willfp.eco.core.integrations.antigrief.AntigriefManager
 import com.willfp.eco.core.integrations.customitems.CustomItemsManager
+import com.willfp.eco.core.integrations.economy.EconomyManager
+import com.willfp.eco.core.integrations.hologram.HologramManager
 import com.willfp.eco.core.integrations.mcmmo.McmmoManager
 import com.willfp.eco.core.integrations.shop.ShopManager
 import com.willfp.eco.core.items.Items
@@ -18,28 +22,66 @@ import com.willfp.eco.internal.drops.DropManager
 import com.willfp.eco.proxy.BlockBreakProxy
 import com.willfp.eco.proxy.FastItemStackFactoryProxy
 import com.willfp.eco.proxy.SkullProxy
+import com.willfp.eco.proxy.TPSProxy
 import com.willfp.eco.spigot.arrows.ArrowDataListener
-import com.willfp.eco.spigot.display.*
+import com.willfp.eco.spigot.data.DataListener
+import com.willfp.eco.spigot.data.EcoPlayerProfileHandler
+import com.willfp.eco.spigot.data.PlayerBlockListener
+import com.willfp.eco.spigot.data.storage.DataHandler
+import com.willfp.eco.spigot.data.storage.MySQLDataHandler
+import com.willfp.eco.spigot.data.storage.YamlDataHandler
+import com.willfp.eco.spigot.display.PacketAutoRecipe
+import com.willfp.eco.spigot.display.PacketChat
+import com.willfp.eco.spigot.display.PacketOpenWindowMerchant
+import com.willfp.eco.spigot.display.PacketSetCreativeSlot
+import com.willfp.eco.spigot.display.PacketSetSlot
+import com.willfp.eco.spigot.display.PacketWindowItems
+import com.willfp.eco.spigot.display.frame.clearFrames
 import com.willfp.eco.spigot.drops.CollatedRunnable
-import com.willfp.eco.spigot.eventlisteners.*
+import com.willfp.eco.spigot.eventlisteners.EntityDeathByEntityListeners
+import com.willfp.eco.spigot.eventlisteners.NaturalExpGainListeners
+import com.willfp.eco.spigot.eventlisteners.PlayerJumpListeners
+import com.willfp.eco.spigot.eventlisteners.armor.ArmorChangeEventListeners
+import com.willfp.eco.spigot.eventlisteners.armor.ArmorListener
 import com.willfp.eco.spigot.gui.GUIListener
-import com.willfp.eco.spigot.integrations.anticheat.*
-import com.willfp.eco.spigot.integrations.antigrief.*
+import com.willfp.eco.spigot.integrations.afk.AFKIntegrationCMI
+import com.willfp.eco.spigot.integrations.afk.AFKIntegrationEssentials
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatAAC
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatAlice
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatMatrix
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatNCP
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatSpartan
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatVulcan
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefBentoBox
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefCombatLogXV10
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefCombatLogXV11
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefFactionsUUID
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefGriefPrevention
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefKingdoms
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefLands
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefSuperiorSkyblock2
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefTowny
+import com.willfp.eco.spigot.integrations.antigrief.AntigriefWorldGuard
+import com.willfp.eco.spigot.integrations.customitems.CustomItemsHeadDatabase
 import com.willfp.eco.spigot.integrations.customitems.CustomItemsItemsAdder
 import com.willfp.eco.spigot.integrations.customitems.CustomItemsOraxen
+import com.willfp.eco.spigot.integrations.economy.EconomyVault
+import com.willfp.eco.spigot.integrations.hologram.HologramCMI
+import com.willfp.eco.spigot.integrations.hologram.HologramGHolo
+import com.willfp.eco.spigot.integrations.hologram.HologramHolographicDisplays
 import com.willfp.eco.spigot.integrations.mcmmo.McmmoIntegrationImpl
+import com.willfp.eco.spigot.integrations.multiverseinventories.MultiverseInventoriesIntegration
 import com.willfp.eco.spigot.integrations.shop.ShopShopGuiPlus
 import com.willfp.eco.spigot.recipes.ShapedRecipeListener
 import com.willfp.eco.util.BlockUtils
+import com.willfp.eco.util.ServerUtils
 import com.willfp.eco.util.SkullUtils
 import net.kyori.adventure.platform.bukkit.BukkitAudiences
+import net.milkbowl.vault.economy.Economy
 import org.bukkit.Bukkit
 import org.bukkit.Material
-import org.bukkit.block.Block
-import org.bukkit.entity.Player
 import org.bukkit.event.Listener
 import org.bukkit.inventory.ItemStack
-import org.bukkit.inventory.meta.SkullMeta
 
 abstract class EcoSpigotPlugin : EcoPlugin(
     773,
@@ -47,29 +89,40 @@ abstract class EcoSpigotPlugin : EcoPlugin(
     "com.willfp.eco.proxy",
     "&a"
 ) {
+    lateinit var dataHandler: DataHandler
+
     init {
         Items.registerArgParser(EnchantmentArgParser())
         Items.registerArgParser(TextureArgParser())
 
         val skullProxy = getProxy(SkullProxy::class.java)
         SkullUtils.initialize(
-            { meta: SkullMeta, base64: String -> skullProxy.setSkullTexture(meta, base64) },
-            { meta: SkullMeta -> skullProxy.getSkullTexture(meta) }
+            { meta, base64 -> skullProxy.setSkullTexture(meta, base64) },
+            { meta -> skullProxy.getSkullTexture(meta) }
         )
 
         val blockBreakProxy = getProxy(BlockBreakProxy::class.java)
-        BlockUtils.initialize { player: Player, block: Block -> blockBreakProxy.breakBlock(player, block) }
+        BlockUtils.initialize { player, block -> blockBreakProxy.breakBlock(player, block) }
+
+        val tpsProxy = getProxy(TPSProxy::class.java)
+        ServerUtils.initialize { tpsProxy.getTPS() }
 
         postInit()
     }
 
     private fun postInit() {
-        Display.handler = EcoDisplayHandler(this)
+        Display.setHandler(EcoDisplayHandler(this))
+
+        this.dataHandler = if (this.configYml.getBool("mysql.enabled"))
+            MySQLDataHandler(this) else YamlDataHandler(this)
     }
 
     override fun handleEnable() {
         CollatedRunnable(this)
-        (Eco.getHandler() as EcoHandler).adventure = BukkitAudiences.create(this)
+
+        if (!Prerequisite.HAS_PAPER.isMet) {
+            (Eco.getHandler() as EcoHandler).setAdventure(BukkitAudiences.create(this))
+        }
 
         this.logger.info("Ignore messages about deprecated events!")
 
@@ -91,12 +144,25 @@ abstract class EcoSpigotPlugin : EcoPlugin(
     }
 
     override fun handleDisable() {
-        Eco.getHandler().adventure.close()
+        Eco.getHandler().adventure?.close()
     }
 
     override fun handleReload() {
         CollatedRunnable(this)
         DropManager.update(this)
+        this.scheduler.runTimer(
+            { clearFrames() },
+            this.configYml.getInt("display-frame-ttl").toLong(),
+            this.configYml.getInt("display-frame-ttl").toLong()
+        )
+        this.scheduler.runTimer(
+            {
+                (Eco.getHandler().playerProfileHandler as EcoPlayerProfileHandler)
+                    .autosave(this.configYml.getBool("autosave.async"))
+            },
+            this.configYml.getInt("autosave.ticks").toLong(),
+            this.configYml.getInt("autosave.ticks").toLong()
+        )
     }
 
     override fun handleAfterLoad() {
@@ -107,9 +173,10 @@ abstract class EcoSpigotPlugin : EcoPlugin(
     override fun loadIntegrationLoaders(): List<IntegrationLoader> {
         return listOf(
             // AntiGrief
+            IntegrationLoader("SuperiorSkyblock2") { AntigriefManager.register(AntigriefSuperiorSkyblock2()) },
+            IntegrationLoader("BentoBox") { AntigriefManager.register(AntigriefBentoBox()) },
             IntegrationLoader("WorldGuard") { AntigriefManager.register(AntigriefWorldGuard()) },
             IntegrationLoader("GriefPrevention") { AntigriefManager.register(AntigriefGriefPrevention()) },
-            IntegrationLoader("GriefDefender") { AntigriefManager.register(AntigriefGriefDefender()) },
             IntegrationLoader("FactionsUUID") { AntigriefManager.register(AntigriefFactionsUUID()) },
             IntegrationLoader("Towny") { AntigriefManager.register(AntigriefTowny()) },
             IntegrationLoader("Lands") { AntigriefManager.register(AntigriefLands(this)) },
@@ -132,16 +199,40 @@ abstract class EcoSpigotPlugin : EcoPlugin(
             IntegrationLoader("NoCheatPlus") { AnticheatManager.register(this, AnticheatNCP()) },
             IntegrationLoader("Spartan") { AnticheatManager.register(this, AnticheatSpartan()) },
             IntegrationLoader("Vulcan") { AnticheatManager.register(this, AnticheatVulcan()) },
+            IntegrationLoader("Alice") { AnticheatManager.register(this, AnticheatAlice()) },
 
             // Custom Items
             IntegrationLoader("Oraxen") { CustomItemsManager.register(CustomItemsOraxen()) },
-            IntegrationLoader("ItemsAdder") { CustomItemsManager.register(CustomItemsItemsAdder(this)) },
+            IntegrationLoader("ItemsAdder") { CustomItemsManager.register(CustomItemsItemsAdder()) },
+            IntegrationLoader("HeadDatabase") { CustomItemsManager.register(CustomItemsHeadDatabase(this)) },
 
             // Shop
             IntegrationLoader("ShopGUIPlus") { ShopManager.register(ShopShopGuiPlus()) },
 
+            // Hologram
+            IntegrationLoader("HolographicDisplays") { HologramManager.register(HologramHolographicDisplays(this)) },
+            IntegrationLoader("CMI") { HologramManager.register(HologramCMI()) },
+            IntegrationLoader("GHolo") { HologramManager.register(HologramGHolo()) },
+
+            // AFK
+            IntegrationLoader("Essentials") { AFKManager.register(AFKIntegrationEssentials()) },
+            IntegrationLoader("CMI") { AFKManager.register(AFKIntegrationCMI()) },
+
+            // Economy
+            IntegrationLoader("Vault") {
+                val rsp = Bukkit.getServer().servicesManager.getRegistration(Economy::class.java)
+                if (rsp != null) {
+                    EconomyManager.register(EconomyVault(rsp.provider))
+                }
+            },
+
             // Misc
-            IntegrationLoader("mcMMO") { McmmoManager.register(McmmoIntegrationImpl()) }
+            IntegrationLoader("mcMMO") { McmmoManager.register(McmmoIntegrationImpl()) },
+            IntegrationLoader("Multiverse-Inventories") {
+                this.eventManager.registerListener(
+                    MultiverseInventoriesIntegration(this)
+                )
+            }
         )
     }
 
@@ -160,13 +251,14 @@ abstract class EcoSpigotPlugin : EcoPlugin(
         return listOf(
             NaturalExpGainListeners(),
             ArmorListener(),
-            DispenserArmorListener(),
             EntityDeathByEntityListeners(this),
             ShapedRecipeListener(this),
             PlayerJumpListeners(),
             GUIListener(this),
             ArrowDataListener(this),
-            ArmorChangeEventListeners(this)
+            ArmorChangeEventListeners(this),
+            DataListener(),
+            PlayerBlockListener(this)
         )
     }
 }

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/DataListener.kt

@@ -0,0 +1,21 @@
+package com.willfp.eco.spigot.data
+
+import com.willfp.eco.core.Eco
+import com.willfp.eco.util.PlayerUtils
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.player.PlayerJoinEvent
+import org.bukkit.event.player.PlayerQuitEvent
+
+class DataListener : Listener {
+    @EventHandler
+    fun onLeave(event: PlayerQuitEvent) {
+        PlayerUtils.updateSavedDisplayName(event.player)
+        Eco.getHandler().playerProfileHandler.savePlayer(event.player.uniqueId)
+    }
+
+    @EventHandler
+    fun onJoin(event: PlayerJoinEvent) {
+        PlayerUtils.updateSavedDisplayName(event.player)
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/EcoKeyRegistry.kt

@@ -0,0 +1,48 @@
+package com.willfp.eco.spigot.data
+
+import com.willfp.eco.core.data.keys.KeyRegistry
+import com.willfp.eco.core.data.keys.PersistentDataKey
+import com.willfp.eco.core.data.keys.PersistentDataKeyType
+import com.willfp.eco.spigot.EcoSpigotPlugin
+import org.bukkit.NamespacedKey
+
+class EcoKeyRegistry(
+    private val plugin: EcoSpigotPlugin
+) : KeyRegistry {
+    private val registry = mutableMapOf<NamespacedKey, PersistentDataKey<*>>()
+
+    override fun registerKey(key: PersistentDataKey<*>) {
+        if (this.registry.containsKey(key.key)) {
+            this.registry.remove(key.key)
+        }
+
+        validateKey(key)
+
+        this.registry[key.key] = key
+
+        plugin.dataHandler.updateKeys()
+    }
+
+    override fun getRegisteredKeys(): MutableSet<PersistentDataKey<*>> {
+        return registry.values.toMutableSet()
+    }
+
+    private fun <T> validateKey(key: PersistentDataKey<T>) {
+        when (key.type) {
+            PersistentDataKeyType.INT -> if (key.defaultValue !is Int) {
+                throw IllegalArgumentException("Invalid Data Type! Should be Int")
+            }
+            PersistentDataKeyType.DOUBLE -> if (key.defaultValue !is Double) {
+                throw IllegalArgumentException("Invalid Data Type! Should be Double")
+            }
+            PersistentDataKeyType.BOOLEAN -> if (key.defaultValue !is Boolean) {
+                throw IllegalArgumentException("Invalid Data Type! Should be Boolean")
+            }
+            PersistentDataKeyType.STRING -> if (key.defaultValue !is String) {
+                throw IllegalArgumentException("Invalid Data Type! Should be String")
+            }
+
+            else -> throw NullPointerException("Null value found!")
+        }
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/EcoPlayerProfileHandler.kt

@@ -0,0 +1,83 @@
+package com.willfp.eco.spigot.data
+
+import com.willfp.eco.core.Eco
+import com.willfp.eco.core.data.PlayerProfile
+import com.willfp.eco.core.data.PlayerProfileHandler
+import com.willfp.eco.core.data.keys.PersistentDataKey
+import com.willfp.eco.internal.data.EcoPlayerProfile
+import com.willfp.eco.spigot.EcoSpigotPlugin
+import org.bukkit.Bukkit
+import java.util.*
+
+class EcoPlayerProfileHandler(
+    private val plugin: EcoSpigotPlugin
+) : PlayerProfileHandler {
+    private val loaded = mutableMapOf<UUID, PlayerProfile>()
+    private val handler = plugin.dataHandler
+
+    override fun load(uuid: UUID): PlayerProfile {
+        val found = loaded[uuid]
+        if (found != null) {
+            return found
+        }
+
+        val data = mutableMapOf<PersistentDataKey<*>, Any>()
+
+        for (key in Eco.getHandler().keyRegistry.registeredKeys) {
+            data[key] = handler.read(uuid, key.key) ?: key.defaultValue
+        }
+
+        val profile = EcoPlayerProfile(data)
+        loaded[uuid] = profile
+        return profile
+    }
+
+    override fun savePlayer(uuid: UUID) {
+        writeToHandler(uuid)
+        saveToHandler()
+    }
+
+    private fun writeToHandler(uuid: UUID) {
+        val profile = load(uuid)
+
+        for (key in Eco.getHandler().keyRegistry.registeredKeys) {
+            handler.write(uuid, key.key, profile.read(key) ?: key.defaultValue)
+        }
+    }
+
+    private fun saveToHandler() {
+        handler.save()
+    }
+
+    override fun saveAll(async: Boolean) {
+        val saver = {
+            for ((uuid, _) in loaded) {
+                writeToHandler(uuid)
+            }
+
+            saveToHandler()
+        }
+
+        if (async) {
+            plugin.scheduler.runAsync(saver)
+        } else {
+            saver.invoke()
+        }
+    }
+
+    fun autosave(async: Boolean) {
+        if (Bukkit.getOnlinePlayers().isEmpty()) {
+            return
+        }
+
+        if (plugin.configYml.getBool("autosave.log")) {
+            plugin.logger.info("Auto-Saving player data!")
+        }
+
+        saveAll(async)
+
+        if (plugin.configYml.getBool("autosave.log")) {
+            plugin.logger.info("Saved player data!")
+        }
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/PlayerBlockListener.kt

@@ -0,0 +1,53 @@
+package com.willfp.eco.spigot.data
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.util.NamespacedKeyUtils
+import org.bukkit.block.Block
+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.BlockMultiPlaceEvent
+import org.bukkit.event.block.BlockPlaceEvent
+import org.bukkit.persistence.PersistentDataType
+
+class PlayerBlockListener(
+    private val plugin: EcoPlugin
+) : Listener {
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    fun onPlace(event: BlockPlaceEvent) {
+        val block = event.blockPlaced
+
+        writeKey(block)
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    fun onPlace(event: BlockMultiPlaceEvent) {
+        val block = event.blockPlaced
+
+        writeKey(block)
+    }
+
+    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+    fun onBreak(event: BlockBreakEvent) {
+        val block = event.block
+
+        this.plugin.scheduler.run {
+            removeKey(block)
+        }
+    }
+
+    private fun writeKey(block: Block) {
+        val loc = block.location.hashCode().toString(16)
+        block.chunk.persistentDataContainer.set(
+            plugin.namespacedKeyFactory.create(loc.lowercase()),
+            PersistentDataType.INTEGER,
+            1
+        )
+    }
+
+    private fun removeKey(block: Block) {
+        val loc = block.location.hashCode().toString(16)
+        block.chunk.persistentDataContainer.remove(plugin.namespacedKeyFactory.create(loc.lowercase()))
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/storage/DataHandler.kt

@@ -0,0 +1,13 @@
+package com.willfp.eco.spigot.data.storage
+
+import org.bukkit.NamespacedKey
+import java.util.*
+
+interface DataHandler {
+    fun save()
+
+    fun <T> write(uuid: UUID, key: NamespacedKey, value: T)
+    fun <T> read(uuid: UUID, key: NamespacedKey): T?
+
+    fun updateKeys()
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/storage/MySQLDataHandler.kt

@@ -0,0 +1,123 @@
+package com.willfp.eco.spigot.data.storage
+
+import com.willfp.eco.core.Eco
+import com.willfp.eco.core.data.keys.PersistentDataKey
+import com.willfp.eco.core.data.keys.PersistentDataKeyType
+import com.willfp.eco.spigot.EcoSpigotPlugin
+import org.bukkit.NamespacedKey
+import org.jetbrains.exposed.dao.id.UUIDTable
+import org.jetbrains.exposed.sql.BooleanColumnType
+import org.jetbrains.exposed.sql.Column
+import org.jetbrains.exposed.sql.Database
+import org.jetbrains.exposed.sql.DoubleColumnType
+import org.jetbrains.exposed.sql.IntegerColumnType
+import org.jetbrains.exposed.sql.ResultRow
+import org.jetbrains.exposed.sql.SchemaUtils
+import org.jetbrains.exposed.sql.VarCharColumnType
+import org.jetbrains.exposed.sql.insert
+import org.jetbrains.exposed.sql.select
+import org.jetbrains.exposed.sql.transactions.transaction
+import org.jetbrains.exposed.sql.update
+import java.util.UUID
+
+@Suppress("UNCHECKED_CAST")
+class MySQLDataHandler(
+    plugin: EcoSpigotPlugin
+) : DataHandler {
+    private val columns = mutableMapOf<String, Column<*>>()
+
+    init {
+        Database.connect(
+            "jdbc:mysql://" +
+                    "${plugin.configYml.getString("mysql.host")}:" +
+                    "${plugin.configYml.getString("mysql.port")}/" +
+                    plugin.configYml.getString("mysql.database"),
+            driver = "com.mysql.cj.jdbc.Driver",
+            user = plugin.configYml.getString("mysql.user"),
+            password = plugin.configYml.getString("mysql.password")
+        )
+
+        transaction {
+            SchemaUtils.create(Players)
+        }
+    }
+
+    override fun updateKeys() {
+        transaction {
+            for (key in Eco.getHandler().keyRegistry.registeredKeys) {
+                registerColumn(key, Players)
+            }
+
+            SchemaUtils.createMissingTablesAndColumns(Players)
+        }
+    }
+
+    override fun save() {
+        // Do nothing
+    }
+
+    override fun <T> write(uuid: UUID, key: NamespacedKey, value: T) {
+        transaction {
+            getPlayer(uuid)
+            val column: Column<T> = getColumn(key.toString()) as Column<T>
+
+            Players.update({ Players.id eq uuid }) {
+                it[column] = value
+            }
+        }
+    }
+
+    override fun <T> read(uuid: UUID, key: NamespacedKey): T? {
+        var value: T? = null
+        transaction {
+            val player = getPlayer(uuid)
+            value = player[getColumn(key.toString())] as T?
+        }
+        return value
+    }
+
+    object Players : UUIDTable("eco_players") {
+
+    }
+
+    private fun <T> registerColumn(key: PersistentDataKey<T>, table: UUIDTable) {
+        table.apply {
+            if (this.columns.stream().anyMatch { it.name == key.key.toString() }) {
+                return@apply
+            }
+
+            when (key.type) {
+                PersistentDataKeyType.INT -> registerColumn<Int>(key.key.toString(), IntegerColumnType())
+                    .default(key.defaultValue as Int)
+                PersistentDataKeyType.DOUBLE -> registerColumn<Double>(key.key.toString(), DoubleColumnType())
+                    .default(key.defaultValue as Double)
+                PersistentDataKeyType.BOOLEAN -> registerColumn<Boolean>(key.key.toString(), BooleanColumnType())
+                    .default(key.defaultValue as Boolean)
+                PersistentDataKeyType.STRING -> registerColumn<String>(key.key.toString(), VarCharColumnType(512))
+                    .default(key.defaultValue as String)
+
+                else -> throw NullPointerException("Null value found!")
+            }
+        }
+    }
+
+    private fun getColumn(name: String): Column<*> {
+        val cached = columns[name]
+        if (cached != null) {
+            return cached
+        }
+
+        columns[name] = Players.columns.stream().filter { it.name == name }.findFirst().get()
+        return getColumn(name)
+    }
+
+    private fun getPlayer(uuid: UUID): ResultRow {
+        Players.select { Players.id eq uuid }.firstOrNull() ?: run {
+            Players.insert {
+                it[id] = uuid
+            }
+        }
+
+        return Players.select { Players.id eq uuid }.first()
+    }
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/data/storage/YamlDataHandler.kt

@@ -0,0 +1,37 @@
+package com.willfp.eco.spigot.data.storage
+
+import com.willfp.eco.core.config.yaml.YamlBaseConfig
+import com.willfp.eco.spigot.EcoSpigotPlugin
+import org.bukkit.NamespacedKey
+import java.util.*
+
+@Suppress("UNCHECKED_CAST")
+class YamlDataHandler(
+    plugin: EcoSpigotPlugin
+) : DataHandler {
+    private val dataYml = DataYml(plugin)
+
+    override fun save() {
+        dataYml.save()
+    }
+
+    override fun updateKeys() {
+        // Do nothing
+    }
+
+    override fun <T> write(uuid: UUID, key: NamespacedKey, value: T) {
+        dataYml.set("player.$uuid.$key", value)
+    }
+
+    override fun <T> read(uuid: UUID, key: NamespacedKey): T? {
+        return dataYml.get("player.$uuid.$key") as T?
+    }
+
+    class DataYml(
+        plugin: EcoSpigotPlugin
+    ) : YamlBaseConfig(
+        "data",
+        false,
+        plugin
+    )
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/display/PacketChat.kt

@@ -13,7 +13,7 @@ import org.bukkit.entity.Player
 class PacketChat(plugin: EcoPlugin) :
     AbstractPacketAdapter(plugin,
         PacketType.Play.Server.CHAT,
-        if (plugin.configYml.getBool("use-lower-protocollib-priority")) ListenerPriority.NORMAL else ListenerPriority.MONITOR,
+        if (plugin.configYml.getBool("use-lower-protocollib-priority")) ListenerPriority.NORMAL else ListenerPriority.HIGHEST,
         true) {
     override fun onSend(
         packet: PacketContainer,

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/display/PacketSetCreativeSlot.kt

@@ -6,6 +6,8 @@ import com.comphenix.protocol.events.PacketEvent
 import com.willfp.eco.core.AbstractPacketAdapter
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.display.Display
+import com.willfp.eco.spigot.display.frame.DisplayFrame
+import com.willfp.eco.spigot.display.frame.lastDisplayFrame
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 
@@ -21,5 +23,7 @@ class PacketSetCreativeSlot(plugin: EcoPlugin) :
                 itemStack!!
             )
         }
+
+        player.lastDisplayFrame = DisplayFrame.EMPTY
     }
 }

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/display/PacketSetSlot.kt

@@ -6,6 +6,8 @@ import com.comphenix.protocol.events.PacketEvent
 import com.willfp.eco.core.AbstractPacketAdapter
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.display.Display
+import com.willfp.eco.spigot.display.frame.DisplayFrame
+import com.willfp.eco.spigot.display.frame.lastDisplayFrame
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 
@@ -20,5 +22,7 @@ class PacketSetSlot(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, PacketTyp
                 item!!, player
             )
         }
+
+        player.lastDisplayFrame = DisplayFrame.EMPTY
     }
 }

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/display/PacketWindowItems.kt

@@ -1,31 +1,148 @@
 package com.willfp.eco.spigot.display
 
 import com.comphenix.protocol.PacketType
+import com.comphenix.protocol.ProtocolLibrary
 import com.comphenix.protocol.events.PacketContainer
 import com.comphenix.protocol.events.PacketEvent
+import com.google.common.util.concurrent.ThreadFactoryBuilder
 import com.willfp.eco.core.AbstractPacketAdapter
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.display.Display
+import com.willfp.eco.core.fast.FastItemStack
+import com.willfp.eco.spigot.display.frame.DisplayFrame
+import com.willfp.eco.spigot.display.frame.HashedItem
+import com.willfp.eco.spigot.display.frame.lastDisplayFrame
+import com.willfp.eco.util.ServerUtils
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
-import java.util.function.Consumer
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.Executors
+import java.util.concurrent.TimeUnit
 
 class PacketWindowItems(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, PacketType.Play.Server.WINDOW_ITEMS, false) {
+    private val ignorePacketList = ConcurrentHashMap.newKeySet<String>()
+    private val playerRates = ConcurrentHashMap<String, Int>()
+    private val threadFactory = ThreadFactoryBuilder().setNameFormat("eco-display-thread-%d").build()
+    private val executor = Executors.newCachedThreadPool(threadFactory)
+    private val scheduledExecutor = Executors.newSingleThreadScheduledExecutor(threadFactory)
+
     override fun onSend(
         packet: PacketContainer,
         player: Player,
         event: PacketEvent
     ) {
-        packet.itemListModifier.modify(0) { itemStacks: List<ItemStack>? ->
-            if (itemStacks == null) {
-                return@modify null
+        if (ignorePacketList.contains(player.name)) {
+            ignorePacketList.remove(player.name)
+            return
+        }
+
+        val windowId = packet.integers.read(0)
+
+        if (windowId != 0) {
+            player.lastDisplayFrame = DisplayFrame.EMPTY
+        }
+
+        val itemStacks = packet.itemListModifier.read(0) ?: return
+
+        handleRateLimit(player)
+
+        if (usingAsync(player)) {
+            executor.execute {
+                try {
+                    modifyWindowItems(itemStacks, windowId, player)
+                } catch (e: Exception) {
+                    if (this.getPlugin().configYml.getBool("async-display.log-errors")) {
+                        this.getPlugin().logger.warning("Error happened in async processing! Disable async display (/plugins/eco/config.yml) if this is a frequent issue")
+                    }
+                }
+
+                val newPacket = packet.deepClone()
+                newPacket.itemListModifier.write(0, itemStacks)
+
+                ignorePacketList.add(player.name)
+
+                ProtocolLibrary.getProtocolManager().sendServerPacket(player, newPacket)
             }
-            itemStacks.forEach(Consumer { item: ItemStack ->
-                Display.display(
-                    item, player
-                )
-            })
-            itemStacks
+        } else {
+            packet.itemListModifier.write(0, modifyWindowItems(itemStacks, windowId, player))
         }
     }
+
+    private fun handleRateLimit(player: Player) {
+        fun modifyRateValueBy(player: Player, amount: Int) {
+            val name = player.name
+            val current = playerRates[name] ?: 0
+            val new = current + amount
+            if (new <= 0) {
+                playerRates.remove(name)
+            } else {
+                playerRates[name] = new
+            }
+        }
+
+        modifyRateValueBy(player, 1)
+
+        scheduledExecutor.schedule(
+            { modifyRateValueBy(player, -1) },
+            this.getPlugin().configYml.getInt("async-display.ratelimit.timeframe").toLong(),
+            TimeUnit.SECONDS
+        )
+    }
+
+    private fun usingAsync(player: Player): Boolean {
+        if (this.getPlugin().configYml.getBool("async-display.enabled")) {
+            return true
+        }
+
+        if (
+            this.getPlugin().configYml.getBool("async-display.emergency.enabled")
+            && ServerUtils.getTps() <= this.getPlugin().configYml.getDouble("async-display.emergency.cutoff")
+        ) {
+            return true
+        }
+
+        if (
+            this.getPlugin().configYml.getBool("async-display.ratelimit.enabled")
+            && (playerRates[player.name] ?: 0) >= this.getPlugin().configYml.getInt("async-display.ratelimit.cutoff")
+        ) {
+            return true
+        }
+
+        return false
+    }
+
+    private fun modifyWindowItems(
+        itemStacks: MutableList<ItemStack>,
+        windowId: Int,
+        player: Player
+    ): MutableList<ItemStack> {
+        if (this.getPlugin().configYml.getBool("use-display-frame") && windowId == 0) {
+            val frameMap = mutableMapOf<Byte, HashedItem>()
+
+            for (index in itemStacks.indices) {
+                frameMap[index.toByte()] =
+                    HashedItem(FastItemStack.wrap(itemStacks[index]).hashCode(), itemStacks[index])
+            }
+
+            val newFrame = DisplayFrame(frameMap)
+
+            val lastFrame = player.lastDisplayFrame
+
+            player.lastDisplayFrame = newFrame
+
+            val changes = lastFrame.getChangedSlots(newFrame)
+
+            for (index in changes) {
+                Display.display(itemStacks[index.toInt()], player)
+            }
+
+            for (index in (itemStacks.indices subtract changes.toSet())) {
+                itemStacks[index.toInt()] = lastFrame.getItem(index.toByte()) ?: itemStacks[index.toInt()]
+            }
+        } else {
+            itemStacks.forEach { Display.display(it, player) }
+        }
+
+        return itemStacks
+    }
 }

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/display/frame/DisplayFrame.kt

@@ -0,0 +1,44 @@
+package com.willfp.eco.spigot.display.frame
+
+import org.bukkit.entity.Player
+import org.bukkit.inventory.ItemStack
+import java.util.*
+import java.util.concurrent.ConcurrentHashMap
+
+data class HashedItem(val hash: Int, val item: ItemStack)
+
+data class DisplayFrame(val items: Map<Byte, HashedItem>) {
+    fun getChangedSlots(newFrame: DisplayFrame): List<Byte> {
+        val changes = mutableListOf<Byte>()
+
+        for ((slot, data) in newFrame.items) {
+            if (items[slot]?.hash != data.hash) {
+                changes.add(slot)
+            }
+        }
+
+        return changes
+    }
+
+    fun getItem(slot: Byte): ItemStack? {
+        return items[slot]?.item
+    }
+
+    companion object {
+        val EMPTY = DisplayFrame(emptyMap())
+    }
+}
+
+private val frames = ConcurrentHashMap<UUID, DisplayFrame>()
+
+var Player.lastDisplayFrame: DisplayFrame
+    get() {
+        return frames[this.uniqueId] ?: DisplayFrame.EMPTY
+    }
+    set(value) {
+        frames[this.uniqueId] = value
+    }
+
+fun clearFrames() {
+    frames.clear()
+}

eco-core/core-plugin/src/main/kotlin/com/willfp/eco/spigot/eventlisteners/armor/ArmorChangeEventListeners.kt

@@ -0,0 +1,33 @@
+package com.willfp.eco.spigot.eventlisteners.armor
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.events.ArmorChangeEvent
+import com.willfp.eco.core.events.ArmorEquipEvent
+import org.bukkit.Bukkit
+import org.bukkit.entity.Player
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.block.BlockDispenseArmorEvent
+
+class ArmorChangeEventListeners(
+    private val plugin: EcoPlugin
+) : Listener {
+    @EventHandler
+    fun onArmorChange(event: ArmorEquipEvent) {
+        val player = event.player
+        val before = player.inventory.armorContents.toMutableList()
+        plugin.scheduler.run {
+            val after = player.inventory.armorContents.toMutableList()
+            val armorChangeEvent = ArmorChangeEvent(player, before, after)
+            Bukkit.getPluginManager().callEvent(armorChangeEvent)
+        }
+    }
+
+    @EventHandler
+    fun dispenseArmorEvent(event: BlockDispenseArmorEvent) {
+        val type = ArmorType.matchType(event.item)
+        if (type != null && event.targetEntity is Player) {
+            Bukkit.getPluginManager().callEvent(ArmorEquipEvent(event.targetEntity as Player))
+        }
+    }
+}