Minor fixes

This reverts commit 9e92ea6062.

build.gradle.kts

@@ -4,7 +4,7 @@ buildscript {
     }
 
     dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10")
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.21")
     }
 }
 
@@ -13,7 +13,7 @@ plugins {
     id("com.github.johnrengelman.shadow") version "7.1.2"
     id("maven-publish")
     id("java")
-    kotlin("jvm") version "1.6.10"
+    kotlin("jvm") version "1.6.21"
 }
 
 dependencies {
@@ -71,9 +71,6 @@ allprojects {
         // CombatLogX
         maven("https://nexus.sirblobman.xyz/repository/public/")
 
-        // IridiumSkyblock
-        maven("https://nexus.iridiumdevelopment.net/repository/maven-releases/")
-
         // MythicMobs
         maven("https://mvn.lumine.io/repository/maven-public/")
 
@@ -85,21 +82,25 @@ allprojects {
     }
 
     dependencies {
-        compileOnly(kotlin("stdlib", version = "1.6.10"))
+        // Included in spigot jar, no need to move to implementation
         compileOnly("org.jetbrains:annotations:23.0.0")
+        compileOnly("com.google.guava:guava:31.1-jre")
 
         // Test
         testImplementation("org.junit.jupiter:junit-jupiter-api:5.8.2")
         testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.8.2")
-        
+
         // Adventure
-        compileOnly("net.kyori:adventure-api:4.10.0")
-        compileOnly("net.kyori:adventure-text-serializer-gson:4.10.0")
-        compileOnly("net.kyori:adventure-text-serializer-legacy:4.10.0")
+        implementation("net.kyori:adventure-api:4.10.1")
+        implementation("net.kyori:adventure-text-serializer-gson:4.10.1") {
+            exclude("com.google.code.gson", "gson") // Prevent shading into the jar
+        }
+        implementation("net.kyori:adventure-text-serializer-legacy:4.10.1")
 
         // Other
-        compileOnly("com.google.guava:guava:31.1-jre")
-        compileOnly("com.github.ben-manes.caffeine:caffeine:3.0.5")
+        implementation("com.github.ben-manes.caffeine:caffeine:3.0.6")
+        implementation("org.apache.maven:maven-artifact:3.8.4")
+        implementation(kotlin("stdlib", version = "1.6.21"))
     }
 
     tasks.withType<JavaCompile> {
@@ -115,10 +116,11 @@ allprojects {
         exclude(group = "com.darkblade12", module = "particleeffect")
         exclude(group = "com.github.cryptomorin", module = "XSeries")
         exclude(group = "net.wesjd", module = "anvilgui")
+        exclude(group = "org.slf4j", module = "slf4j-api")
     }
 
     configurations.testImplementation {
-        setExtendsFrom(listOf(configurations.compileOnly.get()))
+        setExtendsFrom(listOf(configurations.compileOnly.get(), configurations.implementation.get()))
     }
 
     tasks {
@@ -133,6 +135,28 @@ allprojects {
         shadowJar {
             relocate("org.bstats", "com.willfp.eco.libs.bstats")
             relocate("redempt.crunch", "com.willfp.eco.libs.crunch")
+            relocate("org.apache.commons.lang3", "com.willfp.eco.libs.lang3")
+            relocate("org.apache.maven", "com.willfp.eco.libs.maven")
+            relocate("org.checkerframework", "com.willfp.eco.libs.checkerframework")
+            relocate("org.intellij", "com.willfp.eco.libs.intellij")
+            relocate("org.jetbrains.annotations", "com.willfp.eco.libs.jetbrains.annotations")
+            //relocate("org.jetbrains.exposed", "com.willfp.eco.libs.exposed")
+            relocate("org.objenesis", "com.willfp.eco.libs.objenesis")
+            relocate("org.reflections", "com.willfp.eco.libs.reflections")
+            relocate("javassist", "com.willfp.eco.libs.javassist")
+            relocate("javax.annotation", "com.willfp.eco.libs.annotation")
+            relocate("com.google.errorprone", "com.willfp.eco.libs.errorprone")
+            relocate("com.google.j2objc", "com.willfp.eco.libs.j2objc")
+            relocate("com.google.thirdparty", "com.willfp.eco.libs.google.thirdparty")
+            relocate("com.google.protobuf", "com.willfp.eco.libs.google.protobuf") // No I don't know either
+            relocate("google.protobuf", "com.willfp.eco.libs.protobuf") // Still don't know
+            relocate("com.zaxxer.hikari", "com.willfp.eco.libs.hikari")
+            //relocate("com.mysql", "com.willfp.eco.libs.mysql")
+
+            /*
+            Kotlin and caffeine are not shaded so that they can be accessed directly by eco plugins.
+            Also, not relocating adventure, because it's a pain in the ass, and it doesn't *seem* to be causing loader constraint violations.
+             */
         }
 
         compileJava {

eco-api/build.gradle

@@ -4,7 +4,6 @@ dependencies {
 
     // 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:4.6.1-SNAPSHOT'
     compileOnly 'com.google.code.gson:gson:2.8.8'
 }

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

@@ -353,9 +353,9 @@ public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
                 DefaultArtifactVersion mostRecentVersion = new DefaultArtifactVersion(version);
                 if (!(currentVersion.compareTo(mostRecentVersion) > 0 || currentVersion.equals(mostRecentVersion))) {
                     this.outdated = true;
-                    this.getLogger().warning("&c" + this.getName() + " is out of date! (Version " + this.getDescription().getVersion() + ")");
-                    this.getLogger().warning("&cThe newest version is &f" + version);
-                    this.getLogger().warning("&cDownload the new version!");
+                    this.getLogger().warning(this.getName() + " is out of date! (Version " + this.getDescription().getVersion() + ")");
+                    this.getLogger().warning("The newest version is " + version);
+                    this.getLogger().warning("Download the new version!");
                 }
             });
         }
@@ -489,9 +489,9 @@ public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
     public final void reload() {
         this.getConfigHandler().updateConfigs();
 
+        this.getScheduler().cancelAll();
         this.getConfigHandler().callUpdate();
         this.getConfigHandler().callUpdate(); // Call twice to fix issues
-        this.getScheduler().cancelAll();
 
         this.handleReload();
 
@@ -694,7 +694,7 @@ public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
     public final FileConfiguration getConfig() {
         this.getLogger().warning("Call to default config method in eco plugin!");
 
-        return Objects.requireNonNull(this.getConfigYml().getBukkitHandle());
+        return Objects.requireNonNull(this.getConfigYml().toBukkit());
     }
 
     /**

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

@@ -35,7 +35,7 @@ public class Prerequisite {
      *
      * @deprecated Use {@link EconomyManager#hasRegistrations()} instead.
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     public static final Prerequisite HAS_VAULT = new Prerequisite(
             () -> ClassUtils.exists("net.milkbowl.vault.economy.Economy"),
             "Requires server to have vault"
@@ -54,7 +54,7 @@ public class Prerequisite {
      *
      * @deprecated eco no longer supports versions before 1.17.
      */
-    @Deprecated(since = "6.25.2")
+    @Deprecated(since = "6.25.2", forRemoval = true)
     public static final Prerequisite HAS_1_17 = new Prerequisite(
             () -> ProxyConstants.NMS_VERSION.contains("17") || HAS_1_18.isMet(),
             "Requires server to be running 1.17+"

eco-api/src/main/java/com/willfp/eco/core/command/CommandBase.java

@@ -10,6 +10,7 @@ import java.util.List;
 /**
  * Interface for all command implementations.
  */
+@SuppressWarnings("removal")
 public interface CommandBase {
     /**
      * Get command name.
@@ -81,7 +82,7 @@ public interface CommandBase {
      * @see CommandHandler
      * @deprecated Use {@link CommandBase#onExecute(CommandSender, List)} instead.
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     CommandHandler getHandler();
 
     /**
@@ -91,7 +92,7 @@ public interface CommandBase {
      * @see CommandHandler
      * @deprecated Handlers have been deprecated.
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     void setHandler(@NotNull CommandHandler handler);
 
     /**
@@ -101,7 +102,7 @@ public interface CommandBase {
      * @see TabCompleteHandler
      * @deprecated Use {@link CommandBase#tabComplete(CommandSender, List)} instead.
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     TabCompleteHandler getTabCompleter();
 
     /**
@@ -111,6 +112,6 @@ public interface CommandBase {
      * @see TabCompleteHandler
      * @deprecated Handlers have been deprecated.
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     void setTabCompleter(@NotNull TabCompleteHandler handler);
 }

eco-api/src/main/java/com/willfp/eco/core/command/CommandHandler.java

@@ -16,7 +16,7 @@ import java.util.List;
  * update to use the new system: {@link CommandBase#onExecute(CommandSender, List)}.
  */
 @FunctionalInterface
-@Deprecated(since = "6.17.0")
+@Deprecated(since = "6.17.0", forRemoval = true)
 public interface CommandHandler {
     /**
      * The code to be called on execution.

eco-api/src/main/java/com/willfp/eco/core/command/TabCompleteHandler.java

@@ -16,7 +16,7 @@ import java.util.List;
  * update to use the new system: {@link CommandBase#tabComplete(CommandSender, List)}
  */
 @FunctionalInterface
-@Deprecated(since = "6.17.0")
+@Deprecated(since = "6.17.0", forRemoval = true)
 public interface TabCompleteHandler {
     /**
      * Handle Tab Completion.

eco-api/src/main/java/com/willfp/eco/core/command/impl/HandledCommand.java

@@ -2,8 +2,6 @@ package com.willfp.eco.core.command.impl;
 
 import com.willfp.eco.core.EcoPlugin;
 import com.willfp.eco.core.command.CommandBase;
-import com.willfp.eco.core.command.CommandHandler;
-import com.willfp.eco.core.command.TabCompleteHandler;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Player;
 import org.bukkit.util.StringUtil;
@@ -23,7 +21,7 @@ import java.util.stream.Collectors;
  * in order to execute the command-specific code. It's essentially an internal
  * layer, hence why it's a package-private class.
  */
-@SuppressWarnings({"DeprecatedIsStillUsed"})
+@SuppressWarnings({"DeprecatedIsStillUsed", "removal"})
 abstract class HandledCommand implements CommandBase {
     /**
      * The plugin.
@@ -54,14 +52,14 @@ abstract class HandledCommand implements CommandBase {
      */
     @Deprecated
     @Nullable
-    private CommandHandler handler = null;
+    private com.willfp.eco.core.command.CommandHandler handler = null;
 
     /**
      * The tab completion code to be executed in the command.
      */
     @Deprecated
     @Nullable
-    private TabCompleteHandler tabCompleter = null;
+    private com.willfp.eco.core.command.TabCompleteHandler tabCompleter = null;
 
     /**
      * All subcommands for the command.
@@ -256,27 +254,27 @@ abstract class HandledCommand implements CommandBase {
         return this.subcommands;
     }
 
-    @Deprecated
+    @Deprecated(forRemoval = true)
     @Override
-    public @Nullable CommandHandler getHandler() {
+    public @Nullable com.willfp.eco.core.command.CommandHandler getHandler() {
         return this.handler;
     }
 
-    @Deprecated
+    @Deprecated(forRemoval = true)
     @Override
-    public @Nullable TabCompleteHandler getTabCompleter() {
+    public @Nullable com.willfp.eco.core.command.TabCompleteHandler getTabCompleter() {
         return this.tabCompleter;
     }
 
-    @Deprecated
+    @Deprecated(forRemoval = true)
     @Override
-    public void setHandler(@Nullable final CommandHandler handler) {
+    public void setHandler(@Nullable final com.willfp.eco.core.command.CommandHandler handler) {
         this.handler = handler;
     }
 
-    @Deprecated
+    @Deprecated(forRemoval = true)
     @Override
-    public void setTabCompleter(@Nullable final TabCompleteHandler tabCompleter) {
+    public void setTabCompleter(@Nullable final com.willfp.eco.core.command.TabCompleteHandler tabCompleter) {
         this.tabCompleter = tabCompleter;
     }
 }

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

@@ -23,13 +23,31 @@ public abstract class BaseConfig extends LoadableConfigWrapper {
                          @NotNull final PluginLike plugin,
                          final boolean removeUnused,
                          @NotNull final ConfigType type) {
+        this(configName, plugin, removeUnused, type, true);
+    }
+
+    /**
+     * Create new Base Config.
+     *
+     * @param plugin               The plugin or extension.
+     * @param configName           The config name (excluding extension).
+     * @param removeUnused         If unused sections should be removed.
+     * @param type                 The config type.
+     * @param requiresChangeToSave If changes must be applied to save the config.
+     */
+    protected BaseConfig(@NotNull final String configName,
+                         @NotNull final PluginLike plugin,
+                         final boolean removeUnused,
+                         @NotNull final ConfigType type,
+                         final boolean requiresChangeToSave) {
         super(Eco.getHandler().getConfigFactory().createUpdatableConfig(
                 configName,
                 plugin,
                 "",
                 plugin.getClass(),
                 removeUnused,
-                type
+                type,
+                requiresChangeToSave
         ));
     }
 }

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

@@ -0,0 +1,29 @@
+package com.willfp.eco.core.config;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Builder for configs to create them programmatically.
+ */
+public class BuildableConfig extends TransientConfig {
+    /**
+     * Create a new empty config builder.
+     */
+    public BuildableConfig() {
+        super();
+    }
+
+    /**
+     * Add to the config builder.
+     *
+     * @param path   The path.
+     * @param object The object.
+     * @return The builder.
+     */
+    public BuildableConfig add(@NotNull final String path,
+                               @Nullable final Object object) {
+        set(path, object);
+        return this;
+    }
+}

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

@@ -1,5 +1,7 @@
 package com.willfp.eco.core.config;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * Config types, classified by file extension.
  */
@@ -7,10 +9,28 @@ public enum ConfigType {
     /**
      * .json config.
      */
-    JSON,
+    JSON("json"),
 
     /**
      * .yml config.
      */
-    YAML
+    YAML("yml");
+
+    /**
+     * The file extension.
+     */
+    private final String extension;
+
+    ConfigType(@NotNull final String extension) {
+        this.extension = extension;
+    }
+
+    /**
+     * Get the file extension.
+     *
+     * @return The extension.
+     */
+    public String getExtension() {
+        return extension;
+    }
 }

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

@@ -38,6 +38,7 @@ public abstract class ExtendableConfig extends LoadableConfigWrapper {
                 source,
                 removeUnused,
                 type,
+                true,
                 updateBlacklist
         ));
     }

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

@@ -26,7 +26,8 @@ public abstract class StaticBaseConfig extends LoadableConfigWrapper {
                 plugin,
                 "",
                 plugin.getClass(),
-                type
+                type,
+                true
         ));
     }
 }

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

@@ -3,12 +3,17 @@ package com.willfp.eco.core.config;
 import com.willfp.eco.core.Eco;
 import com.willfp.eco.core.config.interfaces.Config;
 import com.willfp.eco.core.config.wrapper.ConfigWrapper;
+import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.nio.file.Files;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -18,10 +23,19 @@ import java.util.Map;
  */
 public class TransientConfig extends ConfigWrapper<Config> {
     /**
+     * @param config The ConfigurationSection handle.
+     */
+    public TransientConfig(@NotNull final ConfigurationSection config) {
+        super(Eco.getHandler().getConfigFactory().createConfig(config));
+    }
+
+    /**
+     * Exists for backwards compatibility, YamlConfigurations are ConfigurationSections.
+     *
      * @param config The YamlConfiguration handle.
      */
     public TransientConfig(@NotNull final YamlConfiguration config) {
-        super(Eco.getHandler().getConfigFactory().createConfig(config));
+        this((ConfigurationSection) config);
     }
 
     /**
@@ -33,20 +47,50 @@ public class TransientConfig extends ConfigWrapper<Config> {
         )) : new TransientConfig());
     }
 
+    /**
+     * @param file The File.
+     * @deprecated Specify the config type to prevent bugs.
+     */
+    @Deprecated(since = "6.30.0", forRemoval = true)
+    public TransientConfig(@Nullable final File file) {
+        this(file, ConfigType.YAML);
+    }
+
+    /**
+     * @param file The file.
+     * @param type The config type to try read from.
+     */
+    public TransientConfig(@Nullable final File file,
+                           @NotNull final ConfigType type) {
+        super(file != null ? Eco.getHandler().getConfigFactory().createConfig(readFile(file), type)
+                : new TransientConfig());
+    }
+
     /**
      * Create a new empty transient config.
      *
      * @param values The values.
      */
     public TransientConfig(@NotNull final Map<String, Object> values) {
-        super(Eco.getHandler().getConfigFactory().createConfig(values));
+        super(Eco.getHandler().getConfigFactory().createConfig(values, ConfigType.YAML));
+    }
+
+    /**
+     * Create a new empty transient config.
+     *
+     * @param values The values.
+     * @param type   The type.
+     */
+    public TransientConfig(@NotNull final Map<String, Object> values,
+                           @NotNull final ConfigType type) {
+        super(Eco.getHandler().getConfigFactory().createConfig(values, type));
     }
 
     /**
      * Create a new empty transient config.
      */
     public TransientConfig() {
-        super(Eco.getHandler().getConfigFactory().createConfig("", ConfigType.YAML));
+        this(new HashMap<>(), ConfigType.JSON);
     }
 
     /**
@@ -57,4 +101,22 @@ public class TransientConfig extends ConfigWrapper<Config> {
                            @NotNull final ConfigType type) {
         super(Eco.getHandler().getConfigFactory().createConfig(contents, type));
     }
+
+    /**
+     * Read a file to a string.
+     *
+     * @param file The file.
+     * @return The string.
+     */
+    private static String readFile(@Nullable final File file) {
+        if (file == null) {
+            return "";
+        }
+
+        try {
+            return Files.readString(file.toPath());
+        } catch (IOException e) {
+            return "";
+        }
+    }
 }

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

@@ -1,19 +1,25 @@
 package com.willfp.eco.core.config.interfaces;
 
+import com.willfp.eco.core.config.BuildableConfig;
 import com.willfp.eco.core.config.ConfigType;
 import com.willfp.eco.core.config.TransientConfig;
 import com.willfp.eco.core.placeholder.PlaceholderInjectable;
 import com.willfp.eco.core.placeholder.StaticPlaceholder;
 import com.willfp.eco.util.NumberUtils;
 import com.willfp.eco.util.StringUtils;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.Set;
 
 /**
  * All configs implement this interface.
@@ -24,8 +30,13 @@ import java.util.Objects;
 public interface Config extends Cloneable, PlaceholderInjectable {
     /**
      * Clears cache.
+     * <p>
+     * Configs no longer have caches as they have in previous versions.
      */
-    void clearCache();
+    @Deprecated(since = "6.31.1", forRemoval = true)
+    default void clearCache() {
+        // Do nothing.
+    }
 
     /**
      * Convert the config into readable text.
@@ -51,6 +62,19 @@ public interface Config extends Cloneable, PlaceholderInjectable {
     @NotNull
     List<String> getKeys(boolean deep);
 
+    /**
+     * Recurse config keys.
+     *
+     * @param found The found keys.
+     * @param root  The root.
+     * @return The keys.
+     */
+    @NotNull
+    default List<String> recurseKeys(@NotNull Set<String> found,
+                                     @NotNull String root) {
+        return new ArrayList<>();
+    }
+
     /**
      * Get an object from config.
      * Default implementations call {@link org.bukkit.configuration.file.YamlConfiguration#get(String)}.
@@ -241,35 +265,6 @@ public interface Config extends Cloneable, PlaceholderInjectable {
         return getString(path, false, StringUtils.FormatOption.WITHOUT_PLACEHOLDERS);
     }
 
-    /**
-     * Get a string from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param format If the string should be formatted.
-     * @return The found value, or an empty string if not found.
-     * @deprecated Since 6.18.0, {@link Config#getString(String)} is not formatted by default.
-     */
-    @Deprecated(since = "6.18.0")
-    default String getString(@NotNull String path,
-                             boolean format) {
-        return this.getString(path, format, StringUtils.FormatOption.WITH_PLACEHOLDERS);
-    }
-
-    /**
-     * Get a string from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param option The format option.
-     * @return The found value, or an empty string if not found.
-     * @deprecated Use {@link Config#getFormattedString(String, StringUtils.FormatOption)} instead.
-     */
-    @NotNull
-    @Deprecated
-    default String getString(@NotNull String path,
-                             @NotNull final StringUtils.FormatOption option) {
-        return this.getString(path, true, option);
-    }
-
     /**
      * Get a string from config.
      *
@@ -322,36 +317,6 @@ public interface Config extends Cloneable, PlaceholderInjectable {
         return getStringOrNull(path, false, StringUtils.FormatOption.WITH_PLACEHOLDERS);
     }
 
-    /**
-     * Get a string from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param format If the string should be formatted.
-     * @return The found value, or null if not found.
-     * @deprecated Since 6.18.0, {@link Config#getString(String)} is not formatted by default.
-     */
-    @Nullable
-    @Deprecated(since = "6.18.0")
-    default String getStringOrNull(@NotNull String path,
-                                   boolean format) {
-        return this.getStringOrNull(path, format, StringUtils.FormatOption.WITH_PLACEHOLDERS);
-    }
-
-    /**
-     * Get a string from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param option The format option.
-     * @return The found value, or null if not found.
-     * @deprecated Use {@link Config#getFormattedString(String, StringUtils.FormatOption)} instead.
-     */
-    @Nullable
-    @Deprecated
-    default String getStringOrNull(@NotNull String path,
-                                   @NotNull StringUtils.FormatOption option) {
-        return this.getStringOrNull(path, true, option);
-    }
-
     /**
      * Get a string from config.
      *
@@ -406,36 +371,6 @@ public interface Config extends Cloneable, PlaceholderInjectable {
         return getStrings(path, false, StringUtils.FormatOption.WITH_PLACEHOLDERS);
     }
 
-    /**
-     * Get a list of strings from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param format If the strings should be formatted.
-     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
-     * @deprecated Since 6.18.0, {@link Config#getString(String)} is not formatted by default.
-     */
-    @NotNull
-    @Deprecated(since = "6.18.0")
-    default List<String> getStrings(@NotNull String path,
-                                    boolean format) {
-        return this.getStrings(path, format, StringUtils.FormatOption.WITH_PLACEHOLDERS);
-    }
-
-    /**
-     * Get a list of strings from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param option The format option.
-     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
-     * @deprecated Use {@link Config#getFormattedStrings(String, StringUtils.FormatOption)} instead.
-     */
-    @NotNull
-    @Deprecated
-    default List<String> getStrings(@NotNull String path,
-                                    @NotNull StringUtils.FormatOption option) {
-        return getStrings(path, false, option);
-    }
-
     /**
      * Get a list of strings from config.
      *
@@ -494,36 +429,6 @@ public interface Config extends Cloneable, PlaceholderInjectable {
         return getStringsOrNull(path, false, StringUtils.FormatOption.WITH_PLACEHOLDERS);
     }
 
-    /**
-     * Get a list of strings from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param format If the strings should be formatted.
-     * @return The found value, or null if not found.
-     * @deprecated Since 6.18.0, {@link Config#getString(String)} is not formatted by default.
-     */
-    @Nullable
-    @Deprecated(since = "6.18.0")
-    default List<String> getStringsOrNull(@NotNull String path,
-                                          boolean format) {
-        return getStringsOrNull(path, format, StringUtils.FormatOption.WITH_PLACEHOLDERS);
-    }
-
-    /**
-     * Get a list of strings from config.
-     *
-     * @param path   The key to fetch the value from.
-     * @param option The format option.
-     * @return The found value, or null if not found.
-     * @deprecated Use {@link Config#getFormattedStringsOrNull(String, StringUtils.FormatOption)} instead.
-     */
-    @Nullable
-    @Deprecated
-    default List<String> getStringsOrNull(@NotNull String path,
-                                          @NotNull StringUtils.FormatOption option) {
-        return getStringsOrNull(path, false, option);
-    }
-
     /**
      * Get a list of strings from config.
      *
@@ -647,4 +552,33 @@ public interface Config extends Cloneable, PlaceholderInjectable {
     default void clearInjectedPlaceholders() {
         // Do nothing.
     }
+
+    /**
+     * Convert the config to a map of values.
+     *
+     * @return The values.
+     */
+    default Map<String, Object> toMap() {
+        return new HashMap<>();
+    }
+
+    /**
+     * Convert the config to a map of values.
+     *
+     * @return The values.
+     */
+    default ConfigurationSection toBukkit() {
+        YamlConfiguration empty = new YamlConfiguration();
+        empty.createSection("temp", this.toMap());
+        return empty.getConfigurationSection("temp");
+    }
+
+    /**
+     * Create a new config builder.
+     *
+     * @return The builder.
+     */
+    static BuildableConfig builder() {
+        return new BuildableConfig();
+    }
 }

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

@@ -1,63 +0,0 @@
-package com.willfp.eco.core.config.interfaces;
-
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Objects;
-
-/**
- * JSON config.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-@SuppressWarnings("DeprecatedIsStillUsed")
-public interface JSONConfig extends Config {
-    /**
-     * Get a list of subsections from config.
-     *
-     * @param path The key to fetch the value from.
-     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
-     */
-    @NotNull
-    default List<JSONConfig> getSubsections(@NotNull String path) {
-        return Objects.requireNonNullElse(getSubsectionsOrNull(path), new ArrayList<>());
-    }
-
-    /**
-     * Get a list of subsections from config.
-     *
-     * @param path The key to fetch the value from.
-     * @return The found value, or null if not found.
-     */
-    @Nullable
-    List<JSONConfig> getSubsectionsOrNull(@NotNull String path);
-
-
-    /**
-     * Get subsection from config.
-     *
-     * @param path The key to check.
-     * @return The subsection. Throws NPE if not found.
-     */
-    @Override
-    @NotNull
-    JSONConfig getSubsection(@NotNull String path);
-
-    /**
-     * Get subsection from config.
-     *
-     * @param path The key to check.
-     * @return The subsection, or null if not found.
-     */
-    @Override
-    @Nullable
-    JSONConfig getSubsectionOrNull(@NotNull String path);
-
-    @Override
-    JSONConfig clone();
-}

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

@@ -1,7 +1,7 @@
 package com.willfp.eco.core.config.interfaces;
 
 import org.bukkit.configuration.file.YamlConfiguration;
-import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.io.File;
@@ -47,14 +47,21 @@ public interface LoadableConfig extends Config {
     /**
      * Get bukkit {@link YamlConfiguration}.
      * <p>
-     * This method is not recommended unless absolutely required as it
-     * only returns true if the type of config is {@link com.willfp.eco.core.config.ConfigType#YAML},
-     * and if the handle is an {@link YamlConfiguration} specifically. This depends on the internals
-     * and the implementation, and so may cause problems - it exists mostly for parity with
-     * {@link JavaPlugin#getConfig()}.
+     * This used to represent the underlying config, but since 6.30.0 configs use
+     * their own implementations internally, without relying on bukkit.
      *
      * @return The config, or null if config is not yaml-based.
+     * @deprecated Use toBukkit() instead.
      */
     @Nullable
-    YamlConfiguration getBukkitHandle();
+    @Deprecated(since = "6.30.0", forRemoval = true)
+    default YamlConfiguration getBukkitHandle() {
+        return this.toBukkit();
+    }
+
+    /**
+     * Convert the config to a bukkit {@link YamlConfiguration}.
+     */
+    @NotNull
+    YamlConfiguration toBukkit();
 }

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

@@ -1,21 +0,0 @@
-package com.willfp.eco.core.config.interfaces;
-
-import org.bukkit.configuration.file.YamlConfiguration;
-
-/**
- * Interface for configs that wrap an {@link YamlConfiguration}.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-@SuppressWarnings("DeprecatedIsStillUsed")
-public interface WrappedYamlConfiguration {
-    /**
-     * Get the ConfigurationSection handle.
-     *
-     * @return The handle.
-     */
-    YamlConfiguration getBukkitHandle();
-}

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

@@ -1,90 +0,0 @@
-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.ConfigType;
-import com.willfp.eco.core.config.interfaces.JSONConfig;
-import com.willfp.eco.core.config.json.wrapper.LoadableJSONConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Config implementation for configs present in the plugin's base directory (eg config.json).
- * <p>
- * Automatically updates.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-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 PluginLike plugin,
-                             @NotNull final String... updateBlacklist) {
-        super(
-                (JSONConfig)
-                        Eco.getHandler().getConfigFactory().createUpdatableConfig(
-                                configName,
-                                plugin,
-                                "",
-                                plugin.getClass(),
-                                removeUnused,
-                                ConfigType.JSON,
-                                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 PluginLike plugin) {
-        super(
-                (JSONConfig)
-                        Eco.getHandler().getConfigFactory().createUpdatableConfig(
-                                configName,
-                                plugin,
-                                "",
-                                plugin.getClass(),
-                                removeUnused,
-                                ConfigType.JSON
-                        )
-        );
-    }
-
-    /**
-     * @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

@@ -1,70 +0,0 @@
-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.ConfigType;
-import com.willfp.eco.core.config.interfaces.JSONConfig;
-import com.willfp.eco.core.config.json.wrapper.LoadableJSONConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Config implementation for configs present in one of two places:
- * <ul>
- *     <li>Plugin base directory (eg config.yml, lang.yml)</li>
- *     <li>Other extension's configs</li>
- * </ul>
- * <p>
- * Automatically updates.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-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 PluginLike plugin,
-                                   @NotNull final Class<?> source,
-                                   @NotNull final String subDirectoryPath,
-                                   @NotNull final String... updateBlacklist) {
-        super(
-                (JSONConfig)
-                        Eco.getHandler().getConfigFactory().createUpdatableConfig(
-                                configName,
-                                plugin,
-                                subDirectoryPath,
-                                source,
-                                removeUnused,
-                                ConfigType.JSON,
-                                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.
-     * @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

@@ -1,45 +0,0 @@
-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.ConfigType;
-import com.willfp.eco.core.config.interfaces.JSONConfig;
-import com.willfp.eco.core.config.json.wrapper.LoadableJSONConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Non-updatable JSON config that exists within a plugin jar.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public abstract class JSONStaticBaseConfig extends LoadableJSONConfigWrapper {
-    /**
-     * 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 PluginLike plugin) {
-        super((JSONConfig) Eco.getHandler().getConfigFactory().createLoadableConfig(configName, plugin, "", plugin.getClass(), ConfigType.JSON));
-    }
-
-    /**
-     * 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/json/JSONTransientConfig.java

@@ -1,37 +0,0 @@
-package com.willfp.eco.core.config.json;
-
-import com.willfp.eco.core.Eco;
-import com.willfp.eco.core.config.interfaces.JSONConfig;
-import com.willfp.eco.core.config.json.wrapper.JSONConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * Raw JSON config with a map of values at its core.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public class JSONTransientConfig extends JSONConfigWrapper {
-    /**
-     * Config implementation for passing maps.
-     * <p>
-     * Does not automatically update.
-     *
-     * @param values The map of values.
-     */
-    public JSONTransientConfig(@NotNull final Map<String, Object> values) {
-        super((JSONConfig) Eco.getHandler().getConfigFactory().createConfig(values));
-    }
-
-    /**
-     * Empty JSON config.
-     */
-    public JSONTransientConfig() {
-        super((JSONConfig) Eco.getHandler().getConfigFactory().createConfig(new HashMap<>()));
-    }
-}

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

@@ -1,53 +0,0 @@
-package com.willfp.eco.core.config.json.wrapper;
-
-import com.willfp.eco.core.config.interfaces.JSONConfig;
-import com.willfp.eco.core.config.wrapper.ConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.List;
-
-/**
- * Wrapper to handle the backend JSON config implementations.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public abstract class JSONConfigWrapper extends ConfigWrapper<JSONConfig> implements JSONConfig {
-    /**
-     * Create a config wrapper.
-     *
-     * @param handle The handle.
-     */
-    protected JSONConfigWrapper(@NotNull final JSONConfig handle) {
-        super(handle);
-    }
-
-
-    @Override
-    public @NotNull List<JSONConfig> getSubsections(@NotNull final String path) {
-        return this.getHandle().getSubsections(path);
-    }
-
-    @Override
-    public @Nullable List<JSONConfig> getSubsectionsOrNull(@NotNull final String path) {
-        return this.getHandle().getSubsectionsOrNull(path);
-    }
-
-    @Override
-    public @NotNull JSONConfig getSubsection(@NotNull final String path) {
-        return this.getHandle().getSubsection(path);
-    }
-
-    @Override
-    public @Nullable JSONConfig getSubsectionOrNull(@NotNull final String path) {
-        return this.getHandle().getSubsectionOrNull(path);
-    }
-
-    @Override
-    public JSONConfig clone() {
-        return this.getHandle().clone();
-    }
-}

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

@@ -1,63 +0,0 @@
-package com.willfp.eco.core.config.json.wrapper;
-
-import com.willfp.eco.core.config.interfaces.JSONConfig;
-import com.willfp.eco.core.config.interfaces.LoadableConfig;
-import org.apache.commons.lang.Validate;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.io.File;
-import java.io.IOException;
-
-/**
- * Wrapper to handle the backend loadable JSON config implementations.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public abstract class LoadableJSONConfigWrapper extends JSONConfigWrapper implements LoadableConfig {
-    /**
-     * Create a config wrapper.
-     *
-     * @param handle The handle.
-     */
-    protected LoadableJSONConfigWrapper(@NotNull final JSONConfig handle) {
-        super(handle);
-
-        Validate.isTrue(handle instanceof LoadableConfig, "Wrapped config must be loadable!");
-    }
-
-
-    @Override
-    public void createFile() {
-        ((LoadableConfig) this.getHandle()).createFile();
-    }
-
-    @Override
-    public String getResourcePath() {
-        return ((LoadableConfig) this.getHandle()).getResourcePath();
-    }
-
-    @Override
-    public void save() throws IOException {
-        ((LoadableConfig) this.getHandle()).save();
-    }
-
-    @Override
-    public File getConfigFile() {
-        return ((LoadableConfig) this.getHandle()).getConfigFile();
-    }
-
-    @Override
-    public String getName() {
-        return ((LoadableConfig) this.getHandle()).getName();
-    }
-
-    @Override
-    public @Nullable YamlConfiguration getBukkitHandle() {
-        return null;
-    }
-}

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

@@ -1,5 +1,6 @@
 package com.willfp.eco.core.config.updating;
 
+import java.lang.annotation.Documented;
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -29,7 +30,8 @@ import java.lang.annotation.Target;
  * }</pre>
  * <p>
  * If using kotlin, you have to annotate the method with {@code @JvmStatic}
- * in order to prevent null pointer exceptions.
+ * in order to prevent null pointer exceptions - this also means that you cannot
+ * have config updater methods in companion objects.
  * <p>
  * Config update methods in all classes in a plugin jar will be called
  * on reload.
@@ -39,5 +41,6 @@ import java.lang.annotation.Target;
  */
 @Retention(RetentionPolicy.RUNTIME)
 @Target(ElementType.METHOD)
+@Documented
 public @interface ConfigUpdater {
 }

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

@@ -5,7 +5,7 @@ import com.willfp.eco.core.PluginLike;
 import com.willfp.eco.core.config.ConfigType;
 import com.willfp.eco.core.config.interfaces.Config;
 import com.willfp.eco.core.config.interfaces.LoadableConfig;
-import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.configuration.ConfigurationSection;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
@@ -20,13 +20,14 @@ public interface ConfigFactory {
     /**
      * Updatable config.
      *
-     * @param configName       The name of the config
-     * @param plugin           The plugin.
-     * @param subDirectoryPath The subdirectory path.
-     * @param source           The class that owns the resource.
-     * @param removeUnused     Whether keys not present in the default config should be removed on update.
-     * @param type             The config type.
-     * @param updateBlacklist  Substring of keys to not add/remove keys for.
+     * @param configName            The name of the config
+     * @param plugin                The plugin.
+     * @param subDirectoryPath      The subdirectory path.
+     * @param source                The class that owns the resource.
+     * @param removeUnused          Whether keys not present in the default config should be removed on update.
+     * @param type                  The config type.
+     * @param updateBlacklist       Substring of keys to not add/remove keys for.
+     * @param requiresChangesToSave If the config must be changed in order to save the config.
      * @return The config implementation.
      */
     LoadableConfig createUpdatableConfig(@NotNull String configName,
@@ -35,23 +36,26 @@ public interface ConfigFactory {
                                          @NotNull Class<?> source,
                                          boolean removeUnused,
                                          @NotNull ConfigType type,
+                                         boolean requiresChangesToSave,
                                          @NotNull String... updateBlacklist);
 
     /**
      * Loadable config.
      *
-     * @param configName       The name of the config
-     * @param plugin           The plugin.
-     * @param subDirectoryPath The subdirectory path.
-     * @param source           The class that owns the resource.
-     * @param type             The config type.
+     * @param configName            The name of the config
+     * @param plugin                The plugin.
+     * @param subDirectoryPath      The subdirectory path.
+     * @param source                The class that owns the resource.
+     * @param type                  The config type.
+     * @param requiresChangesToSave If the config must be changed in order to save the config.
      * @return The config implementation.
      */
     LoadableConfig createLoadableConfig(@NotNull String configName,
                                         @NotNull PluginLike plugin,
                                         @NotNull String subDirectoryPath,
                                         @NotNull Class<?> source,
-                                        @NotNull ConfigType type);
+                                        @NotNull ConfigType type,
+                                        boolean requiresChangesToSave);
 
     /**
      * Create config.
@@ -59,15 +63,17 @@ public interface ConfigFactory {
      * @param config The handle.
      * @return The config implementation.
      */
-    Config createConfig(@NotNull YamlConfiguration config);
+    Config createConfig(@NotNull ConfigurationSection config);
 
     /**
      * Create config.
      *
      * @param values The values.
+     * @param type   The config type.
      * @return The config implementation.
      */
-    Config createConfig(@NotNull Map<String, Object> values);
+    Config createConfig(@NotNull Map<String, Object> values,
+                        @NotNull ConfigType type);
 
     /**
      * Create config.

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

@@ -8,6 +8,8 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 /**
  * Configs from eco have an internal implementation,
@@ -17,7 +19,7 @@ import java.util.List;
  *
  * @param <T> The type of the handle.
  */
-@SuppressWarnings("MethodDoesntCallSuperMethod")
+@SuppressWarnings({"MethodDoesntCallSuperMethod", "removal"})
 public abstract class ConfigWrapper<T extends Config> implements Config {
     /**
      * Configs from eco have an internal implementation,
@@ -41,6 +43,7 @@ public abstract class ConfigWrapper<T extends Config> implements Config {
     }
 
     @Override
+    @Deprecated(since = "6.31.1", forRemoval = true)
     public void clearCache() {
         handle.clearCache();
     }
@@ -60,6 +63,12 @@ public abstract class ConfigWrapper<T extends Config> implements Config {
         return handle.getKeys(deep);
     }
 
+    @Override
+    public @NotNull List<String> recurseKeys(@NotNull final Set<String> found,
+                                             @NotNull final String root) {
+        return handle.recurseKeys(found, root);
+    }
+
     @Override
     public @Nullable Object get(@NotNull final String path) {
         return handle.get(path);
@@ -155,6 +164,11 @@ public abstract class ConfigWrapper<T extends Config> implements Config {
         handle.clearInjectedPlaceholders();
     }
 
+    @Override
+    public Map<String, Object> toMap() {
+        return this.handle.toMap();
+    }
+
     /**
      * Get the handle.
      *

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

@@ -3,7 +3,6 @@ package com.willfp.eco.core.config.wrapper;
 import com.willfp.eco.core.config.interfaces.LoadableConfig;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
 
 import java.io.File;
 import java.io.IOException;
@@ -47,7 +46,7 @@ public abstract class LoadableConfigWrapper extends ConfigWrapper<LoadableConfig
     }
 
     @Override
-    public @Nullable YamlConfiguration getBukkitHandle() {
-        return this.getHandle().getBukkitHandle();
+    public @NotNull YamlConfiguration toBukkit() {
+        return this.getHandle().toBukkit();
     }
 }

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

@@ -1,87 +0,0 @@
-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.ConfigType;
-import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
- * <p>
- * Automatically updates.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-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 PluginLike plugin,
-                             @NotNull final String... updateBlacklist) {
-        super(
-                Eco.getHandler().getConfigFactory().createUpdatableConfig(
-                        configName,
-                        plugin,
-                        "",
-                        plugin.getClass(),
-                        removeUnused,
-                        ConfigType.YAML,
-                        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 PluginLike plugin) {
-        super(
-                Eco.getHandler().getConfigFactory().createUpdatableConfig(
-                        configName,
-                        plugin,
-                        "",
-                        plugin.getClass(),
-                        removeUnused,
-                        ConfigType.YAML
-                )
-        );
-    }
-
-    /**
-     * @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

@@ -1,68 +0,0 @@
-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.ConfigType;
-import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Config implementation for configs present in one of two places:
- * <ul>
- *     <li>Plugin base directory (eg config.yml, lang.yml)</li>
- *     <li>Other extension's configs</li>
- * </ul>
- * <p>
- * Automatically updates.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-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 PluginLike plugin,
-                                   @NotNull final Class<?> source,
-                                   @NotNull final String subDirectoryPath,
-                                   @NotNull final String... updateBlacklist) {
-        super(
-                Eco.getHandler().getConfigFactory().createUpdatableConfig(
-                        configName,
-                        plugin,
-                        subDirectoryPath,
-                        source,
-                        removeUnused,
-                        ConfigType.YAML,
-                        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.
-     * @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

@@ -1,44 +0,0 @@
-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.ConfigType;
-import com.willfp.eco.core.config.yaml.wrapper.LoadableYamlConfigWrapper;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Non-updatable yaml config that exists within a plugin jar.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public abstract class YamlStaticBaseConfig extends LoadableYamlConfigWrapper {
-    /**
-     * 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 PluginLike plugin) {
-        super(Eco.getHandler().getConfigFactory().createLoadableConfig(configName, plugin, "", plugin.getClass(), ConfigType.YAML));
-    }
-
-    /**
-     * 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/config/yaml/YamlTransientConfig.java

@@ -1,42 +0,0 @@
-package com.willfp.eco.core.config.yaml;
-
-import com.willfp.eco.core.Eco;
-import com.willfp.eco.core.config.ConfigType;
-import com.willfp.eco.core.config.yaml.wrapper.YamlConfigWrapper;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.jetbrains.annotations.NotNull;
-
-import java.io.StringReader;
-
-/**
- * Config implementation for passing YamlConfigurations.
- * <p>
- * Does not automatically update.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public class YamlTransientConfig extends YamlConfigWrapper {
-    /**
-     * @param config The YamlConfiguration handle.
-     */
-    public YamlTransientConfig(@NotNull final YamlConfiguration config) {
-        super(Eco.getHandler().getConfigFactory().createConfig(config));
-    }
-
-    /**
-     * @param contents The contents of the config.
-     */
-    public YamlTransientConfig(@NotNull final String contents) {
-        super(Eco.getHandler().getConfigFactory().createConfig(contents, ConfigType.YAML));
-    }
-
-    /**
-     * Create a new empty transient config.
-     */
-    public YamlTransientConfig() {
-        super(Eco.getHandler().getConfigFactory().createConfig(YamlConfiguration.loadConfiguration(new StringReader(""))));
-    }
-}

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

@@ -1,63 +0,0 @@
-package com.willfp.eco.core.config.yaml.wrapper;
-
-import com.willfp.eco.core.config.interfaces.Config;
-import com.willfp.eco.core.config.interfaces.LoadableConfig;
-import org.apache.commons.lang.Validate;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.io.File;
-import java.io.IOException;
-
-/**
- * Wrapper to handle the backend loadable yaml config implementations.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public abstract class LoadableYamlConfigWrapper extends YamlConfigWrapper implements LoadableConfig {
-    /**
-     * Create a config wrapper.
-     *
-     * @param handle The handle.
-     */
-    protected LoadableYamlConfigWrapper(@NotNull final Config handle) {
-        super(handle);
-
-        Validate.isTrue(handle instanceof LoadableConfig, "Wrapped config must be loadable!");
-    }
-
-
-    @Override
-    public void createFile() {
-        ((LoadableConfig) this.getHandle()).createFile();
-    }
-
-    @Override
-    public String getResourcePath() {
-        return ((LoadableConfig) this.getHandle()).getResourcePath();
-    }
-
-    @Override
-    public void save() throws IOException {
-        ((LoadableConfig) this.getHandle()).save();
-    }
-
-    @Override
-    public File getConfigFile() {
-        return ((LoadableConfig) this.getHandle()).getConfigFile();
-    }
-
-    @Override
-    public String getName() {
-        return ((LoadableConfig) this.getHandle()).getName();
-    }
-
-    @Override
-    public @Nullable YamlConfiguration getBukkitHandle() {
-        return ((LoadableConfig) this.getHandle()).getBukkitHandle();
-    }
-}

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

@@ -1,31 +0,0 @@
-package com.willfp.eco.core.config.yaml.wrapper;
-
-import com.willfp.eco.core.config.interfaces.Config;
-import com.willfp.eco.core.config.interfaces.WrappedYamlConfiguration;
-import com.willfp.eco.core.config.wrapper.ConfigWrapper;
-import org.bukkit.configuration.file.YamlConfiguration;
-import org.jetbrains.annotations.NotNull;
-
-/**
- * Wrapper to handle the backend yaml config implementations.
- *
- * @deprecated JSON and yml have full parity, use configs without a prefix instead,
- * eg {@link com.willfp.eco.core.config.TransientConfig}, {@link com.willfp.eco.core.config.BaseConfig}.
- * These configs will be removed eventually.
- */
-@Deprecated(since = "6.17.0")
-public abstract class YamlConfigWrapper extends ConfigWrapper<Config> implements WrappedYamlConfiguration {
-    /**
-     * Create a config wrapper.
-     *
-     * @param handle The handle.
-     */
-    protected YamlConfigWrapper(@NotNull final Config handle) {
-        super(handle);
-    }
-
-    @Override
-    public YamlConfiguration getBukkitHandle() {
-        return ((WrappedYamlConfiguration) this.getHandle()).getBukkitHandle();
-    }
-}

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

@@ -5,6 +5,7 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * All storable data key types.
@@ -79,6 +80,22 @@ public final class PersistentDataKeyType<T> {
         this.name = name;
     }
 
+    @Override
+    public boolean equals(@Nullable final Object that) {
+        if (this == that) {
+            return true;
+        }
+        if (!(that instanceof PersistentDataKeyType type)) {
+            return false;
+        }
+        return Objects.equals(this.name, type.name);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.name);
+    }
+
     /**
      * Get all registered {@link PersistentDataKeyType}s.
      *

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

@@ -1,10 +1,13 @@
 package com.willfp.eco.core.fast;
 
 import com.willfp.eco.core.Eco;
+import net.kyori.adventure.text.Component;
 import org.bukkit.Material;
 import org.bukkit.enchantments.Enchantment;
 import org.bukkit.inventory.ItemFlag;
 import org.bukkit.inventory.ItemStack;
+import org.bukkit.persistence.PersistentDataContainer;
+import org.bukkit.persistence.PersistentDataHolder;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -16,7 +19,7 @@ import java.util.Set;
 /**
  * FastItemStack contains methods to modify and read items faster than in default bukkit.
  */
-public interface FastItemStack {
+public interface FastItemStack extends PersistentDataHolder {
     /**
      * Get all enchantments on an item.
      *
@@ -24,7 +27,7 @@ public interface FastItemStack {
      * @return A map of all enchantments.
      * @deprecated Poorly named method. Use getEnchants instead.
      */
-    @Deprecated(since = "6.24.0")
+    @Deprecated(since = "6.24.0", forRemoval = true)
     default Map<Enchantment, Integer> getEnchantmentsOnItem(boolean checkStored) {
         return getEnchants(checkStored);
     }
@@ -45,17 +48,54 @@ public interface FastItemStack {
      * @param checkStored If stored enchantments should be accounted for.
      * @return A map of all enchantments.
      */
+    @NotNull
     Map<Enchantment, Integer> getEnchants(boolean checkStored);
 
+    /**
+     * Get the level of an enchantment on an item.
+     *
+     * @param enchantment The enchantment.
+     * @return The enchantment level, or 0 if not found.
+     * @deprecated Poorly named method. Use getEnchantmentLevel instead.
+     */
+    @Deprecated(since = "6.34.0", forRemoval = true)
+    default int getLevelOnItem(@NotNull Enchantment enchantment) {
+        return getEnchantmentLevel(enchantment, false);
+    }
+
     /**
      * Get the level of an enchantment on an item.
      *
      * @param enchantment The enchantment.
      * @param checkStored If the stored NBT should also be checked.
      * @return The enchantment level, or 0 if not found.
+     * @deprecated Poorly named method. Use getEnchantmentLevel instead.
      */
-    int getLevelOnItem(@NotNull Enchantment enchantment,
-                       boolean checkStored);
+    @Deprecated(since = "6.34.0", forRemoval = true)
+    default int getLevelOnItem(@NotNull Enchantment enchantment,
+                               boolean checkStored) {
+        return getEnchantmentLevel(enchantment, checkStored);
+    }
+
+    /**
+     * Get the level of an enchantment.
+     *
+     * @param enchantment The enchantment.
+     * @return The enchantment level, or 0 if not found.
+     */
+    default int getEnchantmentLevel(@NotNull Enchantment enchantment) {
+        return getLevelOnItem(enchantment, false);
+    }
+
+    /**
+     * Get the level of an enchantment.
+     *
+     * @param enchantment The enchantment.
+     * @param checkStored If the stored NBT should also be checked.
+     * @return The enchantment level, or 0 if not found.
+     */
+    int getEnchantmentLevel(@NotNull Enchantment enchantment,
+                            boolean checkStored);
 
     /**
      * Set the item lore.
@@ -64,6 +104,13 @@ public interface FastItemStack {
      */
     void setLore(@Nullable List<String> lore);
 
+    /**
+     * Set the item lore.
+     *
+     * @param lore The lore.
+     */
+    void setLoreComponents(@Nullable List<Component> lore);
+
     /**
      * Get the item lore.
      *
@@ -71,6 +118,40 @@ public interface FastItemStack {
      */
     List<String> getLore();
 
+    /**
+     * Get the item lore.
+     *
+     * @return The lore.
+     */
+    List<Component> getLoreComponents();
+
+    /**
+     * Set the item name.
+     *
+     * @param name The name.
+     */
+    void setDisplayName(@Nullable Component name);
+
+    /**
+     * Set the item name.
+     *
+     * @param name The name.
+     */
+    void setDisplayName(@Nullable String name);
+
+    /**
+     * Get the item display name.
+     *
+     * @return The display name.
+     */
+    Component getDisplayNameComponent();
+
+    /**
+     * Get the item display name.
+     *
+     * @return The display name.
+     */
+    String getDisplayName();
 
     /**
      * Set the rework penalty.
@@ -81,7 +162,6 @@ public interface FastItemStack {
 
     /**
      * Get the rework penalty.
-     * .
      *
      * @return The rework penalty found on the item.
      */
@@ -116,11 +196,28 @@ public interface FastItemStack {
      */
     boolean hasItemFlag(@NotNull ItemFlag flag);
 
+    /**
+     * Get the base NBT tag (Not PublicBukkitValues, the base) as a PersistentDataContainer.
+     * <p>
+     * The returned PersistentDataContainer will not modify the item until the tag is set.
+     *
+     * @return The base NBT tag.
+     */
+    PersistentDataContainer getBaseTag();
+
+    /**
+     * Set the base NBT tag (Not PublicBukkitValues, the base) from a PersistentDataContainer.
+     *
+     * @param container The PersistentDataContainer.
+     */
+    void setBaseTag(@Nullable PersistentDataContainer container);
+
     /**
      * Get the Bukkit ItemStack again.
      *
      * @return The ItemStack.
      */
+    @NotNull
     ItemStack unwrap();
 
     /**

eco-api/src/main/java/com/willfp/eco/core/gui/menu/Menu.java

@@ -96,6 +96,13 @@ public interface Menu {
      */
     Set<NamespacedKey> getKeys(@NotNull Player player);
 
+    /**
+     * Re-render the menu for a player.
+     *
+     * @param player The player.
+     */
+    void refresh(@NotNull Player player);
+
     /**
      * Create a builder with a given amount of rows.
      *

eco-api/src/main/java/com/willfp/eco/core/integrations/customitems/CustomItemsManager.java

@@ -34,6 +34,17 @@ public final class CustomItemsManager {
         }
     }
 
+    /**
+     * Register all the custom items for a specific plugin into eco.
+     *
+     * @see com.willfp.eco.core.items.Items
+     */
+    public static void registerProviders() {
+        for (CustomItemsWrapper customItemsWrapper : REGISTERED) {
+            customItemsWrapper.registerProvider();
+        }
+    }
+
     private CustomItemsManager() {
         throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
     }

eco-api/src/main/java/com/willfp/eco/core/integrations/customitems/CustomItemsWrapper.java

@@ -11,5 +11,14 @@ public interface CustomItemsWrapper extends Integration {
      *
      * @see com.willfp.eco.core.items.Items
      */
-    void registerAllItems();
+    default void registerAllItems() {
+        // Override when needed.
+    }
+
+    /**
+     * Register {@link com.willfp.eco.core.items.provider.ItemProvider}s.
+     */
+    default void registerProvider() {
+        // Override when needed.
+    }
 }

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

@@ -2,18 +2,22 @@ package com.willfp.eco.core.items;
 
 import com.github.benmanes.caffeine.cache.Caffeine;
 import com.github.benmanes.caffeine.cache.LoadingCache;
+import com.willfp.eco.core.fast.FastItemStack;
 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.core.recipe.parts.UnrestrictedMaterialTestableItem;
 import com.willfp.eco.util.NamespacedKeyUtils;
 import com.willfp.eco.util.NumberUtils;
 import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
+import org.bukkit.enchantments.Enchantment;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.persistence.PersistentDataContainer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -114,6 +118,48 @@ public final class Items {
         REGISTRY.remove(key);
     }
 
+    /**
+     * Turn an ItemStack back into a lookup string.
+     *
+     * @param itemStack The ItemStack.
+     * @return The lookup string.
+     */
+    @NotNull
+    public static String toLookupString(@Nullable final ItemStack itemStack) {
+        if (itemStack == null) {
+            return "";
+        }
+
+        StringBuilder builder = new StringBuilder();
+
+        CustomItem customItem = getCustomItem(itemStack);
+
+        if (customItem != null) {
+            builder.append(customItem.getKey());
+        } else {
+            builder.append(itemStack.getType().name().toLowerCase());
+        }
+
+        if (itemStack.getAmount() > 1) {
+            builder.append(" ")
+                    .append(itemStack.getAmount());
+        }
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta != null) {
+            for (LookupArgParser parser : ARG_PARSERS) {
+                String parsed = parser.serializeBack(meta);
+                if (parsed != null) {
+                    builder.append(" ")
+                            .append(parsed);
+                }
+            }
+        }
+
+        return builder.toString();
+    }
+
     /**
      * This is the backbone of the entire eco item system.
      * <p>
@@ -155,11 +201,16 @@ public final class Items {
         String[] split = args[0].toLowerCase().split(":");
 
         if (split.length == 1) {
-            Material material = Material.getMaterial(args[0].toUpperCase());
+            String itemType = args[0];
+            boolean isWildcard = itemType.startsWith("*");
+            if (isWildcard) {
+                itemType = itemType.substring(1);
+            }
+            Material material = Material.getMaterial(itemType.toUpperCase());
             if (material == null || material == Material.AIR) {
                 return new EmptyTestableItem();
             }
-            item = new MaterialTestableItem(material);
+            item = isWildcard ? new UnrestrictedMaterialTestableItem(material) : new MaterialTestableItem(material);
         }
 
         if (split.length == 2) {
@@ -183,11 +234,16 @@ public final class Items {
             This has been superseded by id amount
              */
             if (part == null) {
-                Material material = Material.getMaterial(split[0].toUpperCase());
+                String itemType = split[0];
+                boolean isWildcard = itemType.startsWith("*");
+                if (isWildcard) {
+                    itemType = itemType.substring(1);
+                }
+                Material material = Material.getMaterial(itemType.toUpperCase());
                 if (material == null || material == Material.AIR) {
                     return new EmptyTestableItem();
                 }
-                item = new MaterialTestableItem(material);
+                item = isWildcard ? new UnrestrictedMaterialTestableItem(material) : new MaterialTestableItem(material);
                 stackAmount = Integer.parseInt(split[1]);
             } else {
                 item = part;
@@ -377,6 +433,90 @@ public final class Items {
         return items;
     }
 
+    /**
+     * Merge ItemStack onto another ItemStack.
+     *
+     * @param from The ItemStack to merge from.
+     * @param to   The ItemStack to merge onto.
+     * @return The ItemStack, merged (same instance as to).
+     */
+    @NotNull
+    public static ItemStack mergeFrom(@NotNull final ItemStack from,
+                                      @NotNull final ItemStack to) {
+        ItemMeta fromMeta = from.getItemMeta();
+        ItemMeta toMeta = to.getItemMeta();
+
+        if (fromMeta == null || toMeta == null) {
+            return to;
+        }
+
+        ItemMeta newMeta = mergeFrom(fromMeta, toMeta);
+
+        to.setItemMeta(newMeta);
+        to.setType(from.getType());
+        to.setAmount(from.getAmount());
+        return to;
+    }
+
+    /**
+     * Merge ItemMeta onto other ItemMeta.
+     *
+     * @param from The ItemMeta to merge from.
+     * @param to   The ItemMeta to merge onto.
+     * @return The ItemMeta, merged (same instance as to).
+     */
+    @NotNull
+    public static ItemMeta mergeFrom(@NotNull final ItemMeta from,
+                                     @NotNull final ItemMeta to) {
+        if (from.hasDisplayName()) {
+            to.setDisplayName(from.getDisplayName());
+        }
+
+        to.setLore(from.getLore());
+
+        for (Enchantment enchant : to.getEnchants().keySet()) {
+            to.removeEnchant(enchant);
+        }
+
+        for (Map.Entry<Enchantment, Integer> entry : from.getEnchants().entrySet()) {
+            to.addEnchant(entry.getKey(), entry.getValue(), true);
+        }
+
+        if (from.hasCustomModelData()) {
+            to.setCustomModelData(from.getCustomModelData());
+        } else {
+            to.setCustomModelData(null);
+        }
+
+        return to;
+    }
+
+    /**
+     * Get the base NBT tag on an item.
+     *
+     * @param itemStack The ItemStack.
+     * @return The base NBT.
+     */
+    @NotNull
+    public static PersistentDataContainer getBaseNBT(@NotNull final ItemStack itemStack) {
+        return FastItemStack.wrap(itemStack).getBaseTag();
+    }
+
+    /**
+     * Set the base NBT tag on an item.
+     *
+     * @param itemStack The ItemStack.
+     * @param container The base NBT tag.
+     * @return The ItemStack, modified. Not required to use, as this modifies the instance.¬
+     */
+    @NotNull
+    public static ItemStack setBaseNBT(@NotNull final ItemStack itemStack,
+                                       @Nullable final PersistentDataContainer container) {
+        FastItemStack fis = FastItemStack.wrap(itemStack);
+        fis.setBaseTag(container);
+        return fis.unwrap();
+    }
+
     private Items() {
         throw new UnsupportedOperationException("This is a utility class and cannot be instantiated");
     }

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

@@ -22,4 +22,14 @@ public interface LookupArgParser {
      */
     @Nullable Predicate<ItemStack> parseArguments(@NotNull String[] args,
                                                   @NotNull ItemMeta meta);
+
+    /**
+     * Serialize the item back to a string.
+     *
+     * @param meta The ItemMeta.
+     * @return The string, or null if not required.
+     */
+    default @Nullable String serializeBack(@NotNull final ItemMeta meta) {
+        return null;
+    }
 }

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

@@ -59,6 +59,10 @@ public abstract class AbstractItemStackBuilder<T extends ItemMeta, U extends Abs
      * @param base The ItemStack to start with.
      */
     protected AbstractItemStackBuilder(@NotNull final ItemStack base) {
+        if (base.getType() == Material.AIR) {
+            base.setType(Material.STONE); // Prevents NPEs.
+        }
+
         this.base = base;
         this.meta = (T) base.getItemMeta();
         assert meta != null;

eco-api/src/main/java/com/willfp/eco/core/proxy/exceptions/ProxyError.java

@@ -23,7 +23,7 @@ public class ProxyError extends Error {
      * @param message The message to send.
      * @deprecated Proxy Errors should include a cause.
      */
-    @Deprecated
+    @Deprecated(forRemoval = true)
     public ProxyError(@NotNull final String message) {
         super(message);
     }

eco-api/src/main/java/com/willfp/eco/core/proxy/exceptions/UnsupportedVersionException.java

@@ -8,6 +8,7 @@ import org.jetbrains.annotations.NotNull;
  *
  * @deprecated Poorly named, exception when it's actually an error, contains doubly nested errors.
  */
+@SuppressWarnings("removal")
 @Deprecated(since = "6.24.0", forRemoval = true)
 public class UnsupportedVersionException extends ProxyError {
     /**
@@ -16,7 +17,7 @@ public class UnsupportedVersionException extends ProxyError {
      * @param message The message to send.
      * @deprecated Use the default constructor.
      */
-    @Deprecated(since = "6.24.0")
+    @Deprecated(since = "6.24.0", forRemoval = true)
     public UnsupportedVersionException(@NotNull final String message) {
         super(message);
     }

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

@@ -0,0 +1,32 @@
+package com.willfp.eco.core.recipe.parts;
+
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Same as material testable items, but doesn't filter out custom items.
+ */
+public class UnrestrictedMaterialTestableItem extends MaterialTestableItem {
+    /**
+     * Create a new simple recipe part.
+     *
+     * @param material The material.
+     */
+    public UnrestrictedMaterialTestableItem(@NotNull final Material material) {
+        super(material);
+    }
+
+    /**
+     * If the item matches the material.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is of the specified material.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack != null && itemStack.getType() == this.getMaterial();
+    }
+}
+

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

@@ -28,7 +28,7 @@ public final class DurabilityUtils {
      * @param slot   The slot in the inventory of the item.
      * @deprecated The slot is not required.
      */
-    @Deprecated(since = "6.24.0")
+    @Deprecated(since = "6.24.0", forRemoval = true)
     public static void damageItem(@NotNull final Player player,
                                   @NotNull final ItemStack item,
                                   final int damage,

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

@@ -110,7 +110,7 @@ public final class NumberUtils {
      * @return The new value.
      * @deprecated Pointless method.
      */
-    @Deprecated(since = "6.19.0")
+    @Deprecated(since = "6.19.0", forRemoval = true)
     public static double equalIfOver(final double toChange,
                                      final double limit) {
         return Math.min(toChange, limit);

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

@@ -1,5 +1,6 @@
 package com.willfp.eco.util;
 
+import com.github.benmanes.caffeine.cache.Cache;
 import com.github.benmanes.caffeine.cache.Caffeine;
 import com.github.benmanes.caffeine.cache.LoadingCache;
 import com.google.common.collect.ImmutableList;
@@ -76,33 +77,37 @@ public final class StringUtils {
             .build(StringUtils::processFormatting);
 
     /**
-     * Json -> Legacy Cache.
+     * Json -> Component Cache.
      */
-    private static final LoadingCache<String, String> JSON_TO_LEGACY = Caffeine.newBuilder()
+    private static final Cache<String, Component> JSON_TO_COMPONENT = Caffeine.newBuilder()
             .expireAfterAccess(10, TimeUnit.SECONDS)
-            .build(
-                    json -> {
-                        try {
-                            Component component = GSON_COMPONENT_SERIALIZER.deserialize(json);
-                            return LEGACY_COMPONENT_SERIALIZER.serialize(component);
-                        } catch (JsonSyntaxException e) {
-                            return json;
-                        }
-                    }
-            );
+            .build();
 
     /**
-     * Legacy -> Json Cache.
+     * Component -> Json Cache.
      */
-    private static final LoadingCache<String, String> LEGACY_TO_JSON = Caffeine.newBuilder()
+    private static final Cache<Component, String> COMPONENT_TO_JSON = Caffeine.newBuilder()
             .expireAfterAccess(10, TimeUnit.SECONDS)
-            .build(
-                    legacy -> GSON_COMPONENT_SERIALIZER.serialize(
-                            Component.empty().decoration(TextDecoration.ITALIC, false).append(
-                                    LEGACY_COMPONENT_SERIALIZER.deserialize(legacy)
-                            )
-                    )
-            );
+            .build();
+
+    /**
+     * Legacy -> Component Cache.
+     */
+    private static final Cache<String, Component> LEGACY_TO_COMPONENT = Caffeine.newBuilder()
+            .expireAfterAccess(10, TimeUnit.SECONDS)
+            .build();
+
+    /**
+     * Component -> Legacy Cache.
+     */
+    private static final Cache<Component, String> COMPONENT_TO_LEGACY = Caffeine.newBuilder()
+            .expireAfterAccess(10, TimeUnit.SECONDS)
+            .build();
+
+    /**
+     * Empty JSON.
+     */
+    private static final String EMPTY_JSON = GSON_COMPONENT_SERIALIZER.serialize(Component.empty());
 
     /**
      * Color map.
@@ -483,12 +488,7 @@ public final class StringUtils {
      */
     @NotNull
     public static String legacyToJson(@Nullable final String legacy) {
-        String processed = legacy;
-        if (legacy == null) {
-            processed = "";
-        }
-
-        return LEGACY_TO_JSON.get(processed);
+        return componentToJson(toComponent(legacy));
     }
 
     /**
@@ -499,11 +499,53 @@ public final class StringUtils {
      */
     @NotNull
     public static String jsonToLegacy(@Nullable final String json) {
-        if (json == null || json.isEmpty()) {
-            return "";
+        return toLegacy(jsonToComponent(json));
+    }
+
+    /**
+     * Convert Component to JSON String.
+     *
+     * @param component The Component.
+     * @return The JSON string.
+     */
+    @NotNull
+    public static String componentToJson(@Nullable final Component component) {
+        if (component == null) {
+            return EMPTY_JSON;
         }
 
-        return JSON_TO_LEGACY.get(json);
+        return COMPONENT_TO_JSON.get(component, it -> {
+            try {
+                return GSON_COMPONENT_SERIALIZER.serialize(
+                        Component.empty().decoration(TextDecoration.ITALIC, false).append(
+                                it
+                        )
+                );
+            } catch (JsonSyntaxException e) {
+                return GSON_COMPONENT_SERIALIZER.serialize(Component.empty());
+            }
+        });
+    }
+
+    /**
+     * Convert JSON String to Component.
+     *
+     * @param json The JSON String.
+     * @return The component.
+     */
+    @NotNull
+    public static Component jsonToComponent(@Nullable final String json) {
+        if (json == null || json.isEmpty()) {
+            return Component.empty();
+        }
+
+        return JSON_TO_COMPONENT.get(json, it -> {
+            try {
+                return GSON_COMPONENT_SERIALIZER.deserialize(it);
+            } catch (JsonSyntaxException e) {
+                return Component.empty();
+            }
+        });
     }
 
     /**
@@ -514,12 +556,7 @@ public final class StringUtils {
      */
     @NotNull
     public static Component toComponent(@Nullable final String legacy) {
-        String processed = legacy;
-        if (legacy == null) {
-            processed = "";
-        }
-
-        return LEGACY_COMPONENT_SERIALIZER.deserialize(processed);
+        return LEGACY_TO_COMPONENT.get(legacy == null ? "" : legacy, LEGACY_COMPONENT_SERIALIZER::deserialize);
     }
 
     /**
@@ -530,7 +567,7 @@ public final class StringUtils {
      */
     @NotNull
     public static String toLegacy(@NotNull final Component component) {
-        return LEGACY_COMPONENT_SERIALIZER.serialize(component);
+        return COMPONENT_TO_LEGACY.get(component, LEGACY_COMPONENT_SERIALIZER::serialize);
     }
 
     /**

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

@@ -71,7 +71,7 @@ public final class TeamUtils {
      * @deprecated Stupid method.
      */
     @NotNull
-    @Deprecated(since = "6.24.0")
+    @Deprecated(since = "6.24.0", forRemoval = true)
     public static Team getMaterialColorTeam(@NotNull final Material material) {
         return fromChatColor(MATERIAL_COLORS.getOrDefault(material, ChatColor.WHITE));
     }

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

@@ -0,0 +1,41 @@
+@file:JvmName("ItemsExtensions")
+
+package com.willfp.eco.core.items
+
+import org.bukkit.inventory.ItemStack
+import org.bukkit.inventory.meta.ItemMeta
+import org.bukkit.persistence.PersistentDataContainer
+
+/**
+ * @see Items.toLookupString
+ */
+fun ItemStack?.toLookupString(): String =
+    Items.toLookupString(this)
+
+/**
+ * @see Items.mergeFrom
+ */
+fun ItemStack.mergeFrom(other: ItemStack): ItemStack =
+    Items.mergeFrom(other, this)
+
+/**
+ * @see Items.mergeFrom
+ */
+fun ItemMeta.mergeFrom(other: ItemMeta): ItemMeta =
+    Items.mergeFrom(other, this)
+
+/**
+ * @see Items.getBaseNBT
+ * @see Items.setBaseNBT
+ */
+var ItemStack.baseNBT: PersistentDataContainer
+    get() = Items.getBaseNBT(this)
+    set(value) {
+        Items.setBaseNBT(this, value)
+    }
+
+/**
+ * @see Items.setBaseNBT
+ */
+fun ItemStack.clearNBT() =
+    Items.setBaseNBT(this, null)

eco-api/src/main/kotlin/com/willfp/eco/util/StringUtils.kt

@@ -11,12 +11,24 @@ import org.bukkit.entity.Player
 fun String.toComponent(): Component =
     StringUtils.toComponent(this)
 
+/**
+ * @see StringUtils.jsonToComponent
+ */
+fun String.jsonToComponent(): Component =
+    StringUtils.jsonToComponent(this)
+
 /**
  * @see StringUtils.toLegacy
  */
 fun Component.toLegacy(): String =
     StringUtils.toLegacy(this)
 
+/**
+ * @see StringUtils.componentToJson
+ */
+fun Component.toJSON(): String =
+    StringUtils.componentToJson(this)
+
 /**
  * @see StringUtils.format
  */

eco-core/core-backend/build.gradle

@@ -2,10 +2,12 @@ group 'com.willfp'
 version rootProject.version
 
 dependencies {
+    // Libraries
+    implementation 'org.reflections:reflections:0.9.12'
+    implementation 'org.objenesis:objenesis:3.2'
+
     compileOnly 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'
     compileOnly 'me.clip:placeholderapi:2.10.10'
-    compileOnly 'org.reflections:reflections:0.9.12'
     compileOnly 'net.kyori:adventure-text-minimessage:4.10.0'
     compileOnly 'net.kyori:adventure-platform-bukkit:4.1.0'
-    compileOnly 'org.objenesis:objenesis:3.2'
 }

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

@@ -0,0 +1,125 @@
+@file:Suppress("UNCHECKED_CAST")
+
+package com.willfp.eco.internal.config
+
+import com.willfp.eco.core.config.ConfigType
+import org.bukkit.configuration.file.YamlConstructor
+import org.yaml.snakeyaml.DumperOptions
+import org.yaml.snakeyaml.LoaderOptions
+import org.yaml.snakeyaml.Yaml
+import java.io.BufferedReader
+import java.io.Reader
+
+fun ConfigType.toMap(input: String?): Map<String, Any?> =
+    this.handler.toMap(input)
+
+fun ConfigType.toString(map: Map<String, Any?>): String =
+    this.handler.toString(map)
+
+fun Any?.constrainConfigTypes(type: ConfigType): Any? = when (this) {
+    is Map<*, *> -> EcoConfigSection(type, this.normalizeToConfig(type))
+    is Iterable<*> -> {
+        if (this.firstOrNull() == null) {
+            mutableListOf<Any>()
+        } else if (this.firstOrNull() is Map<*, *>) {
+            this as Iterable<Map<*, *>>
+            this.map { map -> EcoConfigSection(type, map.normalizeToConfig(type)) }
+        } else {
+            this.toMutableList()
+        }
+    }
+    else -> this
+}
+
+fun Map<*, *>.normalizeToConfig(type: ConfigType): Map<String, Any?> {
+    val building = mutableMapOf<String, Any?>()
+
+    for ((unprocessedKey, value) in this.entries) {
+        if (unprocessedKey == null || value == null) {
+            continue
+        }
+
+        val key = unprocessedKey.toString()
+
+        val constrained = value.constrainConfigTypes(type)
+
+        building[key] = constrained
+    }
+
+    return building
+}
+
+fun Reader.readToString(): String {
+    val input = this as? BufferedReader ?: BufferedReader(this)
+    val builder = StringBuilder()
+
+    var line: String?
+    input.use {
+        while (it.readLine().also { read -> line = read } != null) {
+            builder.append(line)
+            builder.append('\n')
+        }
+    }
+
+    return builder.toString()
+}
+
+private val ConfigType.handler: ConfigTypeHandler
+    get() = if (this == ConfigType.JSON) JSONConfigTypeHandler else YamlConfigTypeHandler
+
+private abstract class ConfigTypeHandler(
+    val type: ConfigType
+) {
+    fun toMap(input: String?): Map<String, Any?> {
+        if (input == null || input.isBlank()) {
+            return emptyMap()
+        }
+
+        return parseToMap(input).normalizeToConfig(type)
+    }
+
+    protected abstract fun parseToMap(input: String): Map<*, *>
+
+    abstract fun toString(map: Map<String, Any?>): String
+}
+
+private object YamlConfigTypeHandler : ConfigTypeHandler(ConfigType.YAML) {
+    private fun newYaml(): Yaml {
+        val yamlOptions = DumperOptions()
+        val loaderOptions = LoaderOptions()
+        val representer = EcoRepresenter()
+
+        loaderOptions.maxAliasesForCollections = Int.MAX_VALUE
+        loaderOptions.isAllowDuplicateKeys = false
+
+        yamlOptions.indent = 2
+        yamlOptions.defaultFlowStyle = DumperOptions.FlowStyle.BLOCK
+
+        representer.defaultFlowStyle = DumperOptions.FlowStyle.BLOCK
+
+        return Yaml(
+            YamlConstructor(),
+            representer,
+            yamlOptions,
+            loaderOptions,
+        )
+    }
+
+    override fun parseToMap(input: String): Map<*, *> {
+        return newYaml().load(input) ?: emptyMap<Any, Any>()
+    }
+
+    override fun toString(map: Map<String, Any?>): String {
+        return newYaml().dump(map)
+    }
+}
+
+private object JSONConfigTypeHandler : ConfigTypeHandler(ConfigType.JSON) {
+    override fun parseToMap(input: String): Map<*, *> {
+        return EcoGsonSerializer.gson.fromJson(input, Map::class.java)
+    }
+
+    override fun toString(map: Map<String, Any?>): String {
+        return EcoGsonSerializer.gson.toJson(map)
+    }
+}

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

@@ -0,0 +1,195 @@
+package com.willfp.eco.internal.config
+
+import com.willfp.eco.core.config.ConfigType
+import com.willfp.eco.core.config.interfaces.Config
+import com.willfp.eco.core.placeholder.StaticPlaceholder
+import com.willfp.eco.util.StringUtils
+import org.bukkit.configuration.file.YamlConfiguration
+import java.util.concurrent.ConcurrentHashMap
+
+@Suppress("UNCHECKED_CAST")
+open class EcoConfig(
+    private val configType: ConfigType
+) : Config {
+    private val values = ConcurrentHashMap<String, Any?>()
+
+    @Transient
+    var injections = mutableListOf<StaticPlaceholder>()
+
+    fun init(values: Map<String, Any?>) {
+        this.values.clear()
+        this.values.putAll(values.normalizeToConfig(this.type))
+    }
+
+    override fun toPlaintext(): String {
+        return configType.toString(this.values)
+    }
+
+    override fun has(path: String): Boolean {
+        return get(path) != null
+    }
+
+    override fun getKeys(deep: Boolean): List<String> {
+        return if (deep) {
+            recurseKeys(mutableSetOf(), "")
+        } else {
+            values.keys.toList()
+        }
+    }
+
+    override fun recurseKeys(current: MutableSet<String>, root: String): List<String> {
+        val list = mutableSetOf<String>()
+        for (key in getKeys(false)) {
+            list.add("$root$key")
+            val found = get(key)
+            if (found is Config) {
+                list.addAll(found.recurseKeys(current, "$root$key."))
+            }
+        }
+
+        return list.toList()
+    }
+
+    override fun get(path: String): Any? {
+        val nearestPath = path.split(".")[0]
+
+        if (path.contains(".")) {
+            val remainingPath = path.removePrefix("${nearestPath}.")
+
+            if (remainingPath.isEmpty()) {
+                return null
+            }
+
+            val first = get(nearestPath)
+
+            return if (first is Config) {
+                first.get(remainingPath)
+            } else {
+                null
+            }
+        }
+
+        return values[nearestPath]
+    }
+
+    override fun set(
+        path: String,
+        obj: Any?
+    ) {
+        val nearestPath = path.split(".")[0]
+
+        if (path.contains(".")) {
+            val remainingPath = path.removePrefix("${nearestPath}.")
+
+            if (remainingPath.isEmpty()) {
+                return
+            }
+
+            val section = getSubsection(nearestPath) // Creates a section if null, therefore it can be set.
+            section.set(remainingPath, obj)
+            values[nearestPath] = section // Set the value
+            return
+        }
+
+        if (obj == null) {
+            values.remove(nearestPath)
+        } else {
+            values[nearestPath] = obj.constrainConfigTypes(type)
+        }
+    }
+
+    override fun getSubsection(path: String): Config {
+        return getSubsectionOrNull(path) ?: EcoConfigSection(type, injections = injections)
+    }
+
+    override fun getSubsectionOrNull(path: String): Config? {
+        return get(path) as? Config
+    }
+
+    override fun getSubsectionsOrNull(path: String): List<Config>? {
+        return (get(path) as? Iterable<Config>)?.toList()
+    }
+
+    override fun getType(): ConfigType {
+        return configType
+    }
+
+    override fun getIntOrNull(path: String): Int? {
+        return (get(path) as? Number)?.toInt()
+    }
+
+    override fun getIntsOrNull(path: String): List<Int>? {
+        return (get(path) as? Iterable<Number>)?.map { it.toInt() }
+    }
+
+    override fun getBoolOrNull(path: String): Boolean? {
+        return get(path) as? Boolean
+    }
+
+    override fun getBoolsOrNull(path: String): List<Boolean>? {
+        return (get(path) as? Iterable<Boolean>)?.toList()
+    }
+
+    override fun getStringOrNull(
+        path: String,
+        format: Boolean,
+        option: StringUtils.FormatOption
+    ): String? {
+        val string = get(path)?.toString() ?: return null
+        return if (format) StringUtils.format(string, option) else string
+    }
+
+    override fun getStringsOrNull(
+        path: String,
+        format: Boolean,
+        option: StringUtils.FormatOption
+    ): List<String>? {
+        val strings = (get(path) as? Iterable<*>)?.map { it.toString() } ?: return null
+        return if (format) StringUtils.formatList(strings, option) else strings
+    }
+
+    override fun getDoubleOrNull(path: String): Double? {
+        return (get(path) as? Number)?.toDouble()
+    }
+
+    override fun getDoublesOrNull(path: String): List<Double>? {
+        return (get(path) as? Iterable<Number>)?.map { it.toDouble() }
+    }
+
+    override fun injectPlaceholders(placeholders: Iterable<StaticPlaceholder>) {
+        injections.removeIf { placeholders.any { placeholder -> it.identifier == placeholder.identifier } }
+        injections.addAll(placeholders)
+    }
+
+    override fun getInjectedPlaceholders(): List<StaticPlaceholder> {
+        return injections.toList()
+    }
+
+    override fun clearInjectedPlaceholders() {
+        injections.clear()
+    }
+
+    override fun toMap(): MutableMap<String, Any?> {
+        return values.toMutableMap()
+    }
+
+    override fun toBukkit(): YamlConfiguration {
+        val temp = YamlConfiguration()
+        temp.createSection("temp", this.values.toMap())
+        val section = temp.getConfigurationSection("temp")!!
+
+        val bukkit = YamlConfiguration()
+        for (key in section.getKeys(true)) {
+            bukkit.set(key, section.get(key))
+        }
+        return bukkit
+    }
+
+    override fun clone(): Config {
+        return EcoConfigSection(type, this.values.toMutableMap(), injections)
+    }
+
+    override fun toString(): String {
+        return this.toPlaintext()
+    }
+}

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

@@ -5,61 +5,39 @@ import com.willfp.eco.core.config.ConfigType
 import com.willfp.eco.core.config.interfaces.Config
 import com.willfp.eco.core.config.interfaces.LoadableConfig
 import com.willfp.eco.core.config.wrapper.ConfigFactory
-import com.willfp.eco.internal.config.json.EcoJSONConfigSection
-import com.willfp.eco.internal.config.json.EcoJSONConfigWrapper
-import com.willfp.eco.internal.config.json.EcoLoadableJSONConfig
-import com.willfp.eco.internal.config.json.EcoUpdatableJSONConfig
-import com.willfp.eco.internal.config.yaml.EcoLoadableYamlConfig
-import com.willfp.eco.internal.config.yaml.EcoUpdatableYamlConfig
-import com.willfp.eco.internal.config.yaml.EcoYamlConfigSection
-import org.bukkit.configuration.file.YamlConfiguration
-import java.io.StringReader
+import org.bukkit.configuration.ConfigurationSection
 
 object EcoConfigFactory : ConfigFactory {
-    override fun createConfig(config: YamlConfiguration): Config {
-        return EcoYamlConfigSection(config)
-    }
-
-    override fun createConfig(values: MutableMap<String, Any>): Config {
-        return EcoJSONConfigSection(values)
-    }
-
-    override fun createConfig(contents: String, type: ConfigType): Config {
-        return if (type == ConfigType.JSON) {
-            @Suppress("UNCHECKED_CAST")
-            EcoJSONConfigSection(
-                EcoJSONConfigWrapper.gson.fromJson(
-                    StringReader(contents), Map::class.java
-                ) as MutableMap<String, Any>
-            )
-        } else {
-            EcoYamlConfigSection(YamlConfiguration.loadConfiguration(StringReader(contents)))
+    override fun createConfig(bukkit: ConfigurationSection): Config {
+        val config = createConfig(emptyMap(), ConfigType.YAML)
+        for (key in bukkit.getKeys(true)) {
+            config.set(key, bukkit.get(key))
         }
+
+        return config
     }
 
+    override fun createConfig(values: Map<String, Any>, type: ConfigType): Config =
+        EcoConfigSection(type, values)
+
+    override fun createConfig(contents: String, type: ConfigType): Config =
+        EcoConfigSection(type, type.toMap(contents))
+
     override fun createLoadableConfig(
         configName: String,
         plugin: PluginLike,
         subDirectoryPath: String,
         source: Class<*>,
-        type: ConfigType
-    ): LoadableConfig {
-        return if (type == ConfigType.JSON) {
-            EcoLoadableJSONConfig(
-                configName,
-                plugin,
-                subDirectoryPath,
-                source
-            )
-        } else {
-            EcoLoadableYamlConfig(
-                configName,
-                plugin,
-                subDirectoryPath,
-                source
-            )
-        }
-    }
+        type: ConfigType,
+        requiresChangesToSave: Boolean
+    ): LoadableConfig = EcoLoadableConfig(
+        type,
+        configName,
+        plugin,
+        subDirectoryPath,
+        source,
+        requiresChangesToSave
+    )
 
     override fun createUpdatableConfig(
         configName: String,
@@ -68,26 +46,16 @@ object EcoConfigFactory : ConfigFactory {
         source: Class<*>,
         removeUnused: Boolean,
         type: ConfigType,
+        requiresChangesToSave: Boolean,
         vararg updateBlacklist: String
-    ): LoadableConfig {
-        return if (type == ConfigType.JSON) {
-            EcoUpdatableJSONConfig(
-                configName,
-                plugin,
-                subDirectoryPath,
-                source,
-                removeUnused,
-                *updateBlacklist
-            )
-        } else {
-            EcoUpdatableYamlConfig(
-                configName,
-                plugin,
-                subDirectoryPath,
-                source,
-                removeUnused,
-                *updateBlacklist
-            )
-        }
-    }
-}
+    ): LoadableConfig = EcoUpdatableConfig(
+        type,
+        configName,
+        plugin,
+        subDirectoryPath,
+        source,
+        removeUnused,
+        requiresChangesToSave,
+        *updateBlacklist
+    )
+}

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

@@ -1,14 +1,9 @@
-package com.willfp.eco.internal.config.updating
+package com.willfp.eco.internal.config
 
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.config.interfaces.LoadableConfig
 import com.willfp.eco.core.config.updating.ConfigHandler
 import com.willfp.eco.core.config.updating.ConfigUpdater
-import com.willfp.eco.internal.config.json.EcoLoadableJSONConfig
-import com.willfp.eco.internal.config.json.EcoUpdatableJSONConfig
-import com.willfp.eco.internal.config.updating.exceptions.InvalidUpdateMethodException
-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
 
@@ -24,7 +19,7 @@ class EcoConfigHandler(
 
     override fun callUpdate() {
         for (method in reflections.getMethodsAnnotatedWith(ConfigUpdater::class.java)) {
-            kotlin.runCatching {
+            runCatching {
                 when (method.parameterCount) {
                     0 -> method.invoke(null)
                     1 -> method.invoke(null, this.plugin)
@@ -50,11 +45,11 @@ class EcoConfigHandler(
     override fun updateConfigs() {
         for (config in configs) {
             when (config) {
-                is EcoUpdatableYamlConfig -> config.update()
-                is EcoUpdatableJSONConfig -> config.update()
-                is EcoLoadableYamlConfig -> config.reloadFromFile()
-                is EcoLoadableJSONConfig -> config.reloadFromFile()
+                is EcoUpdatableConfig -> config.update()
+                is EcoLoadableConfig -> config.reloadFromFile()
             }
         }
     }
-}
+}
+
+class InvalidUpdateMethodException(message: String) : RuntimeException(message)

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

@@ -0,0 +1,16 @@
+package com.willfp.eco.internal.config
+
+import com.willfp.eco.core.config.ConfigType
+import com.willfp.eco.core.placeholder.StaticPlaceholder
+
+@Suppress("UNCHECKED_CAST")
+class EcoConfigSection(
+    type: ConfigType,
+    values: Map<String, Any?> = emptyMap(),
+    injections: Collection<StaticPlaceholder> = emptyList()
+) : EcoConfig(type) {
+    init {
+        this.init(values)
+        this.injections = injections.toMutableList()
+    }
+}

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

@@ -0,0 +1,20 @@
+package com.willfp.eco.internal.config
+
+import com.google.gson.GsonBuilder
+import com.google.gson.JsonElement
+import com.google.gson.JsonSerializationContext
+import com.google.gson.JsonSerializer
+import com.willfp.eco.core.config.interfaces.Config
+import java.lang.reflect.Type
+
+object EcoGsonSerializer : JsonSerializer<Config> {
+    val gson = GsonBuilder()
+        .setPrettyPrinting()
+        .disableHtmlEscaping()
+        .registerTypeAdapter(Config::class.java, this)
+        .create()
+
+    override fun serialize(src: Config, typeOfSrc: Type, context: JsonSerializationContext): JsonElement {
+        return gson.toJsonTree(src.toMap())
+    }
+}

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

@@ -1,27 +1,31 @@
-package com.willfp.eco.internal.config.json
+package com.willfp.eco.internal.config
 
 import com.willfp.eco.core.PluginLike
+import com.willfp.eco.core.config.ConfigType
 import com.willfp.eco.core.config.interfaces.LoadableConfig
-import org.bukkit.configuration.file.YamlConfiguration
 import java.io.File
-import java.io.FileNotFoundException
+import java.io.FileInputStream
 import java.io.FileOutputStream
-import java.io.FileReader
 import java.io.IOException
+import java.io.InputStreamReader
 import java.io.OutputStream
+import java.io.Reader
 import java.nio.file.Files
 import java.nio.file.StandardOpenOption
 
 @Suppress("UNCHECKED_CAST")
-open class EcoLoadableJSONConfig(
+open class EcoLoadableConfig(
+    type: ConfigType,
     configName: String,
     private val plugin: PluginLike,
     private val subDirectoryPath: String,
-    val source: Class<*>
-) : EcoJSONConfigWrapper(), LoadableConfig {
-
+    val source: Class<*>,
+    private val requiresChangesToSave: Boolean
+) : EcoConfig(type), LoadableConfig {
     private val configFile: File
-    private val name: String = "$configName.json"
+    private val name: String = "$configName.${type.extension}"
+    private var hasChanged = false
+    private val header = mutableListOf<String>()
 
     fun reloadFromFile() {
         runCatching { init(configFile) }.onFailure { it.printStackTrace() }
@@ -54,19 +58,68 @@ open class EcoLoadableJSONConfig(
 
     @Throws(IOException::class)
     override fun save() {
+        if (requiresChangesToSave) {
+            if (!hasChanged) { // In order to preserve comments
+                return
+            }
+        }
+
         if (configFile.delete()) {
             Files.write(
                 configFile.toPath(),
-                toPlaintext().toByteArray(),
+                this.toPlaintext().toByteArray(),
                 StandardOpenOption.CREATE,
                 StandardOpenOption.WRITE
             )
         }
     }
 
-    @Throws(FileNotFoundException::class)
+    private fun makeHeader(contents: String) {
+        header.clear()
+
+        if (this.type == ConfigType.YAML) {
+            for (line in contents.lines()) {
+                if (!line.startsWith("#")) {
+                    break
+                }
+
+                header.add(line)
+            }
+        }
+    }
+
+    protected fun init(reader: Reader) {
+        val string = reader.readToString()
+        makeHeader(string)
+        super.init(type.toMap(string))
+    }
+
     fun init(file: File) {
-        super.init(gson.fromJson(FileReader(file), Map::class.java) as MutableMap<String, Any>)
+        init(InputStreamReader(FileInputStream(file), Charsets.UTF_8))
+    }
+
+    override fun toPlaintext(): String {
+        val contents = StringBuilder()
+
+        if (this.type == ConfigType.YAML) {
+            for (s in header) {
+                contents.append(s + "\n")
+            }
+
+            if (header.isNotEmpty()) {
+                contents.append("\n")
+            }
+        }
+
+        for (line in super.toPlaintext().lines()) {
+            if (line.startsWith("#")) {
+                continue
+            }
+
+            contents.append(line + "\n")
+        }
+
+        return contents.toString()
     }
 
     override fun getName(): String {
@@ -77,8 +130,9 @@ open class EcoLoadableJSONConfig(
         return configFile
     }
 
-    override fun getBukkitHandle(): YamlConfiguration? {
-        return null
+    override fun set(path: String, obj: Any?) {
+        hasChanged = true
+        super.set(path, obj)
     }
 
     init {
@@ -93,4 +147,4 @@ open class EcoLoadableJSONConfig(
         init(configFile)
         plugin.configHandler.addConfig(this)
     }
-}
+}

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

@@ -0,0 +1,21 @@
+package com.willfp.eco.internal.config
+
+import com.willfp.eco.core.config.interfaces.Config
+import org.yaml.snakeyaml.nodes.Node
+import org.yaml.snakeyaml.representer.Represent
+import org.yaml.snakeyaml.representer.Representer
+
+class EcoRepresenter : Representer() {
+    init {
+        multiRepresenters[Config::class.java] = RepresentConfig(multiRepresenters[Map::class.java]!!)
+    }
+
+    private class RepresentConfig(
+        val handle: Represent
+    ) : Represent {
+        override fun representData(data: Any): Node {
+            data as Config
+            return handle.representData(data.toMap())
+        }
+    }
+}

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

@@ -1,24 +1,25 @@
-package com.willfp.eco.internal.config.json
+package com.willfp.eco.internal.config
 
 import com.willfp.eco.core.PluginLike
-import org.bukkit.configuration.file.YamlConfiguration
+import com.willfp.eco.core.config.ConfigType
+import com.willfp.eco.core.config.interfaces.Config
 import java.io.BufferedReader
 import java.io.InputStreamReader
 import java.nio.charset.StandardCharsets
 
-open class EcoUpdatableJSONConfig(
+open class EcoUpdatableConfig(
+    type: ConfigType,
     configName: String,
     plugin: PluginLike,
     subDirectoryPath: String,
     source: Class<*>,
     private val removeUnused: Boolean,
+    requiresChangesToSave: Boolean,
     vararg updateBlacklist: String
-) : EcoLoadableJSONConfig(configName, plugin, subDirectoryPath, source) {
-
-    private val updateBlacklist: MutableList<String> = mutableListOf(*updateBlacklist)
+) : EcoLoadableConfig(type, configName, plugin, subDirectoryPath, source, requiresChangesToSave) {
+    private val updateBlacklist = mutableListOf(*updateBlacklist)
 
     fun update() {
-        super.clearCache()
         this.init(configFile)
         val newConfig = configInJar ?: return
         if (newConfig.getKeys(true) == this.getKeys(true)) {
@@ -43,13 +44,14 @@ open class EcoUpdatableJSONConfig(
         this.save()
     }
 
-    private val configInJar: YamlConfiguration?
+    private val configInJar: Config?
         get() {
             val newIn = this.source.getResourceAsStream(resourcePath) ?: return null
             val reader = BufferedReader(InputStreamReader(newIn, StandardCharsets.UTF_8))
-            val newConfig = YamlConfiguration()
-            newConfig.load(reader)
-            return newConfig
+
+            val config = EcoConfigSection(type, emptyMap())
+            config.init(type.toMap(reader.readToString()))
+            return config
         }
 
     init {
@@ -57,4 +59,4 @@ open class EcoUpdatableJSONConfig(
         plugin.configHandler.addConfig(this)
         update()
     }
-}
+}

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

@@ -1,11 +0,0 @@
-package com.willfp.eco.internal.config.json
-
-import com.willfp.eco.core.placeholder.StaticPlaceholder
-
-@Suppress("UNCHECKED_CAST")
-class EcoJSONConfigSection(values: Map<String, Any?>, injections: Collection<StaticPlaceholder> = emptyList()) : EcoJSONConfigWrapper() {
-    init {
-        init(values)
-        this.injections = injections.toMutableList()
-    }
-}

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

@@ -1,231 +0,0 @@
-@file:Suppress("DEPRECATION")
-
-package com.willfp.eco.internal.config.json
-
-import com.google.gson.Gson
-import com.google.gson.GsonBuilder
-import com.willfp.eco.core.config.ConfigType
-import com.willfp.eco.core.config.interfaces.JSONConfig
-import com.willfp.eco.core.placeholder.StaticPlaceholder
-import com.willfp.eco.util.StringUtils
-import java.util.Objects
-import java.util.concurrent.ConcurrentHashMap
-
-@Suppress("UNCHECKED_CAST")
-open class EcoJSONConfigWrapper : JSONConfig {
-    companion object {
-        val gson: Gson = GsonBuilder()
-            .setPrettyPrinting()
-            .disableHtmlEscaping()
-            .create()
-    }
-
-    val values = ConcurrentHashMap<String, Any?>()
-
-    private val cache = ConcurrentHashMap<String, Any>()
-    var injections = mutableListOf<StaticPlaceholder>()
-
-    fun init(values: Map<String, Any?>) {
-        this.values.clear()
-        this.values.putAll(values)
-    }
-
-    override fun clearCache() {
-        cache.clear()
-    }
-
-    override fun toPlaintext(): String {
-        return gson.toJson(this.values)
-    }
-
-    override fun has(path: String): Boolean {
-        return getOfKnownType(path, Any::class.java) != null
-    }
-
-    private fun <T : Any?> getOfKnownType(
-        path: String,
-        clazz: Class<T>
-    ): T? {
-        return getOfKnownType(path, clazz, true)
-    }
-
-    protected fun <T> getOfKnownType(
-        path: String,
-        clazz: Class<T>,
-        isBase: Boolean
-    ): T? {
-        var closestPath = path
-        if (cache.containsKey(path) && isBase) {
-            return cache[path] as T?
-        }
-        if (path.contains(".")) {
-            val split = path.split("\\.".toRegex()).toTypedArray()
-            closestPath = split[0]
-        }
-        return if (values[closestPath] is Map<*, *> && path != closestPath) {
-            val section =
-                EcoJSONConfigSection((values[closestPath] as Map<String, Any?>?)!!, injections)
-            section.getOfKnownType(path.substring(closestPath.length + 1), clazz, false)
-        } else {
-            if (values.containsKey(closestPath)) {
-                values[closestPath] as T?
-            } else {
-                null
-            }
-        }
-    }
-
-    override fun getKeys(deep: Boolean): List<String> {
-        return if (deep) {
-            ArrayList(getDeepKeys(HashSet(), ""))
-        } else {
-            ArrayList(values.keys)
-        }
-    }
-
-    protected fun getDeepKeys(
-        list: MutableSet<String>,
-        root: String
-    ): Set<String> {
-        for (key in values.keys) {
-            list.add(root + key)
-            if (values[key] is Map<*, *>) {
-                val section = EcoJSONConfigSection((values[key] as Map<String, Any?>?)!!, injections)
-                list.addAll(section.getDeepKeys(list, "$root$key."))
-            }
-        }
-        return list
-    }
-
-    override fun get(path: String): Any? {
-        return getOfKnownType(path, Any::class.java)
-    }
-
-    override fun set(
-        path: String,
-        `object`: Any?
-    ) {
-        setRecursively(path, `object`)
-        clearCache()
-    }
-
-    protected fun setRecursively(
-        path: String,
-        obj: Any?
-    ) {
-        var closestPath = path
-        if (path.contains(".")) {
-            val split = path.split("\\.".toRegex()).toTypedArray()
-            closestPath = split[0]
-        }
-        if (values[closestPath] is Map<*, *> && path != closestPath) {
-            val section = EcoJSONConfigSection((values[closestPath] as Map<String, Any?>?)!!, injections)
-            section.setRecursively(path.substring(closestPath.length + 1), obj)
-            values[closestPath] = section.values
-        } else {
-            var ob = obj
-            if (ob is JSONConfig) {
-                ob = (obj as EcoJSONConfigWrapper).values
-            }
-            values[path] = ob
-        }
-    }
-
-    override fun getSubsection(path: String): JSONConfig {
-        return getSubsectionOrNull(path) ?: EcoJSONConfigSection(mutableMapOf(), injections)
-    }
-
-    override fun getSubsectionOrNull(path: String): JSONConfig? {
-        return if (values.containsKey(path)) {
-            val subsection = values[path] as Map<String, Any>
-            EcoJSONConfigSection(subsection, injections)
-        } else {
-            null
-        }
-    }
-
-    override fun getSubsectionsOrNull(path: String): List<JSONConfig>? {
-        val maps = getOfKnownType(path, Any::class.java) as List<Map<String, Any>>?
-            ?: return null
-        val configs = mutableListOf<JSONConfig>()
-        for (map in maps) {
-            configs.add(EcoJSONConfigSection(map, injections))
-        }
-        return configs.toMutableList()
-    }
-
-    override fun getIntOrNull(path: String): Int? {
-        return getOfKnownType(path, Double::class.java)?.toInt()
-    }
-
-    override fun getIntsOrNull(path: String): MutableList<Int>? {
-        return (getOfKnownType(path, Any::class.java) as Collection<Int>?)?.toMutableList()
-    }
-
-    override fun getBoolOrNull(path: String): Boolean? {
-        return getOfKnownType(path, Boolean::class.java)
-    }
-
-    override fun getBoolsOrNull(path: String): MutableList<Boolean>? {
-        return (getOfKnownType(path, Any::class.java) as Collection<Boolean>?)?.toMutableList()
-    }
-
-    override fun getStringOrNull(
-        path: String,
-        format: Boolean,
-        option: StringUtils.FormatOption
-    ): String? {
-        return if (has(path)) {
-            val string = getOfKnownType(path, String::class.java) ?: ""
-            return if (format) StringUtils.format(string, option) else string
-        } else {
-            null
-        }
-    }
-
-    override fun getStringsOrNull(
-        path: String,
-        format: Boolean,
-        option: StringUtils.FormatOption
-    ): MutableList<String>? {
-        return if (has(path)) {
-            val strings =
-                (Objects.requireNonNullElse(
-                    getOfKnownType(path, Any::class.java),
-                    emptyList<String>()
-                ) as List<String>).toMutableList()
-            return if (format) StringUtils.formatList(strings, option) else strings
-        } else {
-            null
-        }
-    }
-
-    override fun getDoubleOrNull(path: String): Double? {
-        return getOfKnownType(path, Double::class.java)
-    }
-
-    override fun getDoublesOrNull(path: String): MutableList<Double>? {
-        return (getOfKnownType(path, Any::class.java) as Collection<Double>?)?.toMutableList()
-    }
-
-    override fun injectPlaceholders(placeholders: Iterable<StaticPlaceholder>) {
-        injections.removeIf { placeholders.any { placeholder -> it.identifier == placeholder.identifier } }
-        injections.addAll(placeholders)
-    }
-
-    override fun getInjectedPlaceholders(): List<StaticPlaceholder> {
-        return injections.toList()
-    }
-
-    override fun clearInjectedPlaceholders() {
-        injections.clear()
-    }
-
-    override fun getType(): ConfigType {
-        return ConfigType.JSON
-    }
-
-    override fun clone(): JSONConfig {
-        return EcoJSONConfigSection(this.values.toMutableMap(), injections)
-    }
-}

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

@@ -1,3 +0,0 @@
-package com.willfp.eco.internal.config.updating.exceptions
-
-class InvalidUpdateMethodException(message: String) : RuntimeException(message)

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

@@ -1,82 +0,0 @@
-@file:Suppress("DEPRECATION")
-
-package com.willfp.eco.internal.config.yaml
-
-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.file.YamlConfiguration
-import java.io.File
-import java.io.FileOutputStream
-import java.io.IOException
-import java.io.OutputStream
-
-open class EcoLoadableYamlConfig(
-    configName: String,
-    private val plugin: PluginLike,
-    private val subDirectoryPath: String,
-    val source: Class<*>
-) : EcoYamlConfigWrapper<YamlConfiguration>(), WrappedYamlConfiguration, LoadableConfig {
-
-    private val configFile: File
-    private val name: String = "$configName.yml"
-
-    fun reloadFromFile() {
-        handle.load(getConfigFile())
-    }
-
-    final override fun createFile() {
-        val inputStream = source.getResourceAsStream(resourcePath)!!
-        val outFile = File(this.plugin.dataFolder, resourcePath)
-        val lastIndex = resourcePath.lastIndexOf('/')
-        val outDir = File(this.plugin.dataFolder, resourcePath.substring(0, lastIndex.coerceAtLeast(0)))
-        if (!outDir.exists()) {
-            outDir.mkdirs()
-        }
-        if (!outFile.exists()) {
-            val out: OutputStream = FileOutputStream(outFile)
-            inputStream.copyTo(out)
-            out.close()
-            inputStream.close()
-        }
-    }
-
-    override fun getResourcePath(): String {
-        val resourcePath: String = if (subDirectoryPath.isEmpty()) {
-            name
-        } else {
-            subDirectoryPath + name
-        }
-        return "/$resourcePath"
-    }
-
-    @Throws(IOException::class)
-    override fun save() {
-        handle.save(getConfigFile())
-    }
-
-    override fun getName(): String {
-        return name
-    }
-
-    override fun getConfigFile(): File {
-        return configFile
-    }
-
-    override fun getBukkitHandle(): YamlConfiguration? {
-        return handle
-    }
-
-    init {
-        val directory = File(this.plugin.dataFolder, subDirectoryPath)
-        if (!directory.exists()) {
-            directory.mkdirs()
-        }
-        if (!File(directory, name).exists()) {
-            createFile()
-        }
-        configFile = File(directory, name)
-        this.plugin.configHandler.addConfig(this)
-        init(YamlConfiguration.loadConfiguration(configFile))
-    }
-}

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

@@ -1,60 +0,0 @@
-package com.willfp.eco.internal.config.yaml
-
-import com.willfp.eco.core.PluginLike
-import org.bukkit.configuration.file.YamlConfiguration
-import java.io.BufferedReader
-import java.io.InputStreamReader
-import java.nio.charset.StandardCharsets
-
-class EcoUpdatableYamlConfig(
-    configName: String,
-    plugin: PluginLike,
-    subDirectoryPath: String,
-    source: Class<*>,
-    private val removeUnused: Boolean,
-    vararg updateBlacklist: String
-) : EcoLoadableYamlConfig(configName, plugin, subDirectoryPath, source) {
-
-    private val updateBlacklist: MutableList<String> = mutableListOf(*updateBlacklist)
-
-    fun update() {
-        super.clearCache()
-        this.handle.load(configFile)
-        val newConfig = configInJar ?: return
-        if (newConfig.getKeys(true) == this.handle.getKeys(true)) {
-            return
-        }
-        newConfig.getKeys(true).forEach { key ->
-            if (!this.handle.getKeys(true).contains(key)) {
-                if (updateBlacklist.stream().noneMatch { key.contains(it) }) {
-                    this.handle.set(key, newConfig[key])
-                }
-            }
-        }
-        if (removeUnused) {
-            this.handle.getKeys(true).forEach { s ->
-                if (!newConfig.getKeys(true).contains(s)) {
-                    if (updateBlacklist.stream().noneMatch(s::contains)) {
-                        this.handle.set(s, null)
-                    }
-                }
-            }
-        }
-        this.handle.save(configFile)
-    }
-
-    private val configInJar: YamlConfiguration?
-        get() {
-            val newIn = source.getResourceAsStream(resourcePath) ?: return null
-            val reader = BufferedReader(InputStreamReader(newIn, StandardCharsets.UTF_8))
-            val newConfig = YamlConfiguration()
-            newConfig.load(reader)
-            return newConfig
-        }
-
-    init {
-        this.updateBlacklist.removeIf { it.isEmpty() }
-        plugin.configHandler.addConfig(this)
-        update()
-    }
-}

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

@@ -1,11 +0,0 @@
-package com.willfp.eco.internal.config.yaml
-
-import com.willfp.eco.core.placeholder.StaticPlaceholder
-import org.bukkit.configuration.ConfigurationSection
-
-class EcoYamlConfigSection(section: ConfigurationSection, injections: Collection<StaticPlaceholder> = emptyList()) : EcoYamlConfigWrapper<ConfigurationSection>() {
-    init {
-        init(section)
-        this.injections = injections.toMutableList()
-    }
-}

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

@@ -1,257 +0,0 @@
-package com.willfp.eco.internal.config.yaml
-
-import com.willfp.eco.core.config.ConfigType
-import com.willfp.eco.core.config.interfaces.Config
-import com.willfp.eco.core.placeholder.StaticPlaceholder
-import com.willfp.eco.util.StringUtils
-import org.bukkit.configuration.ConfigurationSection
-import org.bukkit.configuration.file.YamlConfiguration
-import java.io.StringReader
-
-@Suppress("UNCHECKED_CAST")
-open class EcoYamlConfigWrapper<T : ConfigurationSection> : Config {
-    lateinit var handle: T
-    private val cache = mutableMapOf<String, Any?>()
-    var injections = mutableListOf<StaticPlaceholder>()
-
-    protected fun init(config: T): Config {
-        handle = config
-        return this
-    }
-
-    override fun toPlaintext(): String {
-        val temp = YamlConfiguration()
-        for (key in handle.getKeys(true)) {
-            temp[key] = handle[key]
-        }
-        return temp.saveToString()
-    }
-
-    override fun clearCache() {
-        cache.clear()
-    }
-
-    override fun has(path: String): Boolean {
-        return handle.contains(path)
-    }
-
-    override fun getKeys(deep: Boolean): List<String> {
-        return ArrayList(handle.getKeys(deep))
-    }
-
-    override fun get(path: String): Any? {
-        return handle[path]
-    }
-
-    override fun set(
-        path: String,
-        obj: Any?
-    ) {
-        cache.remove(path)
-        handle[path] = obj
-    }
-
-    override fun getSubsectionOrNull(path: String): Config? {
-        return if (cache.containsKey(path)) {
-            cache[path] as Config?
-        } else {
-            val raw = handle.getConfigurationSection(path)
-            if (raw == null) {
-                cache[path] = null
-            } else {
-                cache[path] = EcoYamlConfigSection(raw, injections)
-            }
-            getSubsectionOrNull(path)
-        }
-    }
-
-    override fun getIntOrNull(path: String): Int? {
-        return if (cache.containsKey(path)) {
-            (cache[path] as Number).toInt()
-        } else {
-            if (has(path)) {
-                cache[path] = handle.getDouble(path).toInt()
-            } else {
-                return null
-            }
-            getIntOrNull(path)
-        }
-    }
-
-    override fun getIntsOrNull(path: String): MutableList<Int>? {
-        return if (cache.containsKey(path)) {
-            (cache[path] as Collection<Int>).toMutableList()
-        } else {
-            if (has(path)) {
-                cache[path] = handle.getIntegerList(path).toMutableList()
-            } else {
-                return null
-            }
-            getIntsOrNull(path)
-        }
-    }
-
-    override fun getBoolOrNull(path: String): Boolean? {
-        return if (cache.containsKey(path)) {
-            cache[path] as Boolean
-        } else {
-            if (has(path)) {
-                cache[path] = handle.getBoolean(path)
-            } else {
-                return null
-            }
-            getBoolOrNull(path)
-        }
-    }
-
-    override fun getBoolsOrNull(path: String): MutableList<Boolean>? {
-        return if (cache.containsKey(path)) {
-            (cache[path] as Collection<Boolean>).toMutableList()
-        } else {
-            if (has(path)) {
-                cache[path] = handle.getBooleanList(path).toMutableList()
-            } else {
-                return null
-            }
-            getBoolsOrNull(path)
-        }
-    }
-
-    override fun getStringOrNull(
-        path: String,
-        format: Boolean,
-        option: StringUtils.FormatOption
-    ): String? {
-        return if (has(path)) {
-            if (format && option == StringUtils.FormatOption.WITHOUT_PLACEHOLDERS) {
-                return if (cache.containsKey("$path\$FMT")) {
-                    cache["$path\$FMT"] as String
-                } else {
-                    val string: String = handle.getString(path, "")!!
-                    cache["$path\$FMT"] = StringUtils.format(string, option)
-                    getString(path, format, option)
-                }
-            } else {
-                val string = if (cache.containsKey(path)) {
-                    cache[path] as String
-                } else {
-                    cache[path] = handle.getString(path, "")!!
-                    getString(path, format, option)
-                }
-
-                return if (format) StringUtils.format(string) else string
-            }
-        } else {
-            null
-        }
-    }
-
-    override fun getStringsOrNull(
-        path: String,
-        format: Boolean,
-        option: StringUtils.FormatOption
-    ): MutableList<String>? {
-        return if (has(path)) {
-            if (format && option == StringUtils.FormatOption.WITHOUT_PLACEHOLDERS) {
-                return if (cache.containsKey("$path\$FMT")) {
-                    (cache["$path\$FMT"] as MutableList<String>).toMutableList()
-                } else {
-                    val list = if (has(path)) handle.getStringList(path) else mutableListOf<String>()
-                    cache["$path\$FMT"] = StringUtils.formatList(list, option)
-                    getStrings(path, true, option)
-                }
-            } else {
-                val strings = if (cache.containsKey(path)) {
-                    (cache[path] as MutableList<String>).toMutableList()
-                } else {
-                    cache[path] =
-                        if (has(path)) ArrayList(handle.getStringList(path)) else mutableListOf<String>()
-                    getStrings(path, false, option)
-                }
-
-                return if (format) {
-                    StringUtils.formatList(strings, StringUtils.FormatOption.WITH_PLACEHOLDERS)
-                } else {
-                    strings
-                }
-            }
-        } else {
-            null
-        }
-    }
-
-    override fun getDoubleOrNull(path: String): Double? {
-        return if (cache.containsKey(path)) {
-            (cache[path] as Number).toDouble()
-        } else {
-            if (has(path)) {
-                cache[path] = handle.getDouble(path)
-            } else {
-                return null
-            }
-            getDoubleOrNull(path)
-        }
-    }
-
-    override fun getDoublesOrNull(path: String): MutableList<Double>? {
-        return if (cache.containsKey(path)) {
-            (cache[path] as Collection<Double>).toMutableList()
-        } else {
-            if (has(path)) {
-                cache[path] = handle.getDoubleList(path).toMutableList()
-            } else {
-                return null
-            }
-            getDoublesOrNull(path)
-        }
-    }
-
-    override fun getSubsectionsOrNull(path: String): MutableList<out Config>? {
-        return if (has(path)) {
-            return if (cache.containsKey(path)) {
-                (cache[path] as Collection<Config>).toMutableList()
-            } else {
-                val mapList = ArrayList(handle.getMapList(path)) as List<Map<String, Any?>>
-                val configList = mutableListOf<Config>()
-                for (map in mapList) {
-                    val temp = YamlConfiguration.loadConfiguration(StringReader(""))
-                    temp.createSection("a", map)
-                    configList.add(EcoYamlConfigSection(temp.getConfigurationSection("a")!!, injections))
-                }
-
-                cache[path] = if (has(path)) configList else emptyList()
-                getSubsections(path)
-            }
-        } else {
-            null
-        }
-    }
-
-    override fun injectPlaceholders(placeholders: Iterable<StaticPlaceholder>) {
-        injections.removeIf { placeholders.any { placeholder -> it.identifier == placeholder.identifier } }
-        injections.addAll(placeholders)
-    }
-
-    override fun getInjectedPlaceholders(): List<StaticPlaceholder> {
-        return injections.toList()
-    }
-
-    override fun clearInjectedPlaceholders() {
-        injections.clear()
-    }
-
-    override fun getType(): ConfigType {
-        return ConfigType.JSON
-    }
-
-    override fun clone(): Config {
-        return EcoYamlConfigSection(
-            YamlConfiguration.loadConfiguration(
-                StringReader(
-                    toPlaintext()
-                )
-            ),
-            injections
-        )
-    }
-}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/EcoMenu.kt

@@ -4,7 +4,6 @@ import com.willfp.eco.core.gui.menu.CloseHandler
 import com.willfp.eco.core.gui.menu.Menu
 import com.willfp.eco.core.gui.slot.Slot
 import com.willfp.eco.internal.gui.slot.EcoSlot
-import com.willfp.eco.util.StringUtils
 import org.bukkit.Bukkit
 import org.bukkit.NamespacedKey
 import org.bukkit.entity.Player
@@ -19,7 +18,7 @@ class EcoMenu(
     val slots: List<MutableList<EcoSlot>>,
     private val title: String,
     private val onClose: CloseHandler
-): Menu {
+) : Menu {
     override fun getSlot(row: Int, column: Int): Slot {
         if (row < 1 || row > this.rows) {
             return slots[0][0]
@@ -37,33 +36,23 @@ class EcoMenu(
 
         var i = 0
         for (row in slots) {
-            for (item in row) {
+            for (slot in row) {
                 if (i == rows * 9) {
                     break
                 }
-                val slotItem = item.getItemStack(player, this)
-                val meta = slotItem.itemMeta
-                if (meta != null) {
-                    val lore = meta.lore
-                    if (lore != null) {
-                        lore.replaceAll{ s -> StringUtils.format(s, player) }
-                        meta.lore = lore
-                    }
-                    slotItem.itemMeta = meta
-                }
-                inventory.setItem(i, slotItem)
+                inventory.setItem(i, slot.getItemStack(player, this))
                 i++
             }
         }
 
         player.openInventory(inventory)
-        MenuHandler.registerMenu(inventory, this)
+        MenuHandler.registerInventory(inventory, this, player)
         return inventory
     }
 
     fun handleClose(event: InventoryCloseEvent) {
         onClose.handle(event, this)
-        MenuHandler.unregisterMenu(event.inventory)
+        MenuHandler.unregisterInventory(event.inventory)
     }
 
     override fun getRows(): Int {
@@ -74,9 +63,8 @@ class EcoMenu(
         return title
     }
 
-    override fun getCaptiveItems(player: Player): MutableList<ItemStack> {
-        val inventory = MenuHandler.getExtendedInventory(player.openInventory.topInventory)
-        inventory ?: return mutableListOf()
+    override fun getCaptiveItems(player: Player): List<ItemStack> {
+        val inventory = player.openInventory.topInventory.asRenderedInventory() ?: return emptyList()
         return inventory.captiveItems
     }
 
@@ -86,21 +74,22 @@ class EcoMenu(
         type: PersistentDataType<T, Z>,
         value: Z
     ) {
-        val inventory = MenuHandler.getExtendedInventory(player.openInventory.topInventory)
-        inventory ?: return
+        val inventory = player.openInventory.topInventory.asRenderedInventory() ?: return
         inventory.data[key] = value
-        inventory.refresh(player)
+        inventory.render()
     }
 
     override fun <T : Any, Z : Any> readData(player: Player, key: NamespacedKey, type: PersistentDataType<T, Z>): T? {
-        val inventory = MenuHandler.getExtendedInventory(player.openInventory.topInventory)
-        inventory ?: return null
-        return inventory.data[key] as T?
+        val inventory = player.openInventory.topInventory.asRenderedInventory() ?: return null
+        return inventory.data[key] as? T?
     }
 
-    override fun getKeys(player: Player): MutableSet<NamespacedKey> {
-        val inventory = MenuHandler.getExtendedInventory(player.openInventory.topInventory)
-        inventory ?: return HashSet()
+    override fun getKeys(player: Player): Set<NamespacedKey> {
+        val inventory = player.openInventory.topInventory.asRenderedInventory() ?: return emptySet()
         return inventory.data.keys
     }
-}
+
+    override fun refresh(player: Player) {
+        player.openInventory.topInventory.asRenderedInventory()?.render()
+    }
+}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/MenuHandler.kt

@@ -1,32 +1,29 @@
 package com.willfp.eco.internal.gui.menu
 
 import com.willfp.eco.core.gui.menu.Menu
+import org.bukkit.entity.Player
 import org.bukkit.inventory.Inventory
 import java.util.WeakHashMap
 
-object MenuHandler {
-    private val menus = WeakHashMap<ExtendedInventory, EcoMenu>()
-    private val inventories = WeakHashMap<Inventory, ExtendedInventory>()
+private val inventories = WeakHashMap<Inventory, MenuRenderedInventory>()
 
-    fun registerMenu(
+object MenuHandler {
+    fun registerInventory(
         inventory: Inventory,
-        menu: EcoMenu
+        menu: EcoMenu,
+        player: Player
     ) {
-        val extendedInventory = ExtendedInventory(inventory, menu)
-        inventories[inventory] = extendedInventory
-        menus[extendedInventory] = menu
+        val rendered = MenuRenderedInventory(menu, inventory, player)
+        inventories[inventory] = rendered
     }
 
-    fun unregisterMenu(inventory: Inventory) {
-        menus.remove(inventories[inventory])
+    fun unregisterInventory(inventory: Inventory) {
         inventories.remove(inventory)
     }
+}
 
-    fun getMenu(inventory: Inventory): Menu? {
-        return menus[inventories[inventory]]
-    }
+fun Inventory.asRenderedInventory(): MenuRenderedInventory? =
+    inventories[this]
 
-    fun getExtendedInventory(inventory: Inventory): ExtendedInventory? {
-        return inventories[inventory]
-    }
-}
+fun Inventory.getMenu(): Menu? =
+    this.asRenderedInventory()?.menu

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/menu/MenuRenderedInventory.kt

@@ -1,35 +1,21 @@
 package com.willfp.eco.internal.gui.menu
 
 import com.willfp.eco.util.MenuUtils
-import com.willfp.eco.util.StringUtils
-import org.bukkit.Material
 import org.bukkit.NamespacedKey
 import org.bukkit.entity.Player
 import org.bukkit.inventory.Inventory
 import org.bukkit.inventory.ItemStack
 
-class ExtendedInventory(
+class MenuRenderedInventory(
+    val menu: EcoMenu,
     val inventory: Inventory,
-    private val menu: EcoMenu
+    val player: Player
 ) {
     val captiveItems = mutableListOf<ItemStack>()
     val data = mutableMapOf<NamespacedKey, Any>()
 
-    fun refresh(player: Player) {
-        captiveItems.clear()
-        for (i in 0 until inventory.size) {
-            val (row, column) = MenuUtils.convertSlotToRowColumn(i)
-            val slot = menu.getSlot(row, column)
-            if (slot.isCaptive) {
-                val defaultItem = slot.getItemStack(player)
-                val item = inventory.getItem(i) ?: continue
-                if (item == defaultItem && item.type == Material.AIR) {
-                    continue
-                }
-
-                captiveItems.add(item)
-            }
-        }
+    fun render() {
+        generateCaptive()
 
         var i = 0
         for (row in menu.slots) {
@@ -37,21 +23,31 @@ class ExtendedInventory(
                 if (i == menu.rows * 9) {
                     break
                 }
-                val slotItem = slot.getItemStack(player, menu)
-                val meta = slotItem.itemMeta
-                if (meta != null) {
-                    val lore = meta.lore
-                    if (lore != null) {
-                        lore.replaceAll{ s -> StringUtils.format(s, player) }
-                        meta.lore = lore
-                    }
-                    slotItem.itemMeta = meta
-                }
+
                 if (!slot.isCaptive) {
-                    inventory.setItem(i, slotItem)
+                    inventory.setItem(i, slot.getItemStack(player, menu))
                 }
+
                 i++
             }
         }
     }
-}
+
+    private fun generateCaptive() {
+        captiveItems.clear()
+        for (i in 0 until inventory.size) {
+            val (row, column) = MenuUtils.convertSlotToRowColumn(i)
+            val slot = menu.getSlot(row, column)
+            if (slot.isCaptive) {
+                val renderedItem = slot.getItemStack(player)
+                val itemStack = inventory.getItem(i) ?: continue
+
+                if (itemStack == renderedItem || itemStack.type.isAir || itemStack.amount == 0) {
+                    continue
+                }
+
+                captiveItems.add(itemStack)
+            }
+        }
+    }
+}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/gui/slot/EcoSlot.kt

@@ -5,7 +5,8 @@ import com.willfp.eco.core.gui.slot.Slot
 import com.willfp.eco.core.gui.slot.functional.SlotHandler
 import com.willfp.eco.core.gui.slot.functional.SlotProvider
 import com.willfp.eco.core.gui.slot.functional.SlotUpdater
-import com.willfp.eco.internal.gui.menu.MenuHandler
+import com.willfp.eco.internal.gui.menu.getMenu
+import org.bukkit.Material
 import org.bukkit.entity.Player
 import org.bukkit.event.inventory.ClickType
 import org.bukkit.event.inventory.InventoryClickEvent
@@ -20,11 +21,12 @@ open class EcoSlot(
     private val onMiddleClick: SlotHandler,
     private val updater: SlotUpdater
 ) : Slot {
-
     fun handleInventoryClick(
         event: InventoryClickEvent,
         menu: Menu
     ) {
+        event.isCancelled = true
+
         when (event.click) {
             ClickType.LEFT -> this.onLeftClick.handle(event, this, menu)
             ClickType.RIGHT -> this.onRightClick.handle(event, this, menu)
@@ -36,9 +38,9 @@ open class EcoSlot(
     }
 
     override fun getItemStack(player: Player): ItemStack {
-        val menu = MenuHandler.getMenu(player.openInventory.topInventory)!!
+        val menu = player.openInventory.topInventory.getMenu()!!
         val prev = provider.provide(player, menu)
-        return updater.update(player, menu, prev)
+        return updater.update(player, menu, prev) ?: ItemStack(Material.AIR)
     }
 
     fun getItemStack(
@@ -46,7 +48,8 @@ open class EcoSlot(
         menu: Menu
     ): ItemStack {
         val prev = provider.provide(player, menu)
-        return updater.update(player, menu, prev)
+        val updated = updater.update(player, menu, prev)
+        return updated ?: ItemStack(Material.AIR)
     }
 
     override fun isCaptive(): Boolean {

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserColor.kt

@@ -41,4 +41,12 @@ class ArgParserColor : LookupArgParser {
             )
         }
     }
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        if (meta !is LeatherArmorMeta) {
+            return null
+        }
+
+        return "color:#${Integer.toHexString(meta.color.asRGB())}"
+    }
 }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserCustomModelData.kt

@@ -30,4 +30,12 @@ class ArgParserCustomModelData : LookupArgParser {
             testMeta.customModelData == modelData
         }
     }
-}
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        if (!meta.hasCustomModelData()) {
+            return null
+        }
+
+        return "custom-model-data:${meta.customModelData}"
+    }
+}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserEnchantment.kt

@@ -52,4 +52,26 @@ class ArgParserEnchantment : LookupArgParser {
             true
         }
     }
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        val enchants = mutableMapOf<Enchantment, Int>()
+
+        if (meta is EnchantmentStorageMeta) {
+            enchants.putAll(meta.storedEnchants)
+        } else {
+            enchants.putAll(meta.enchants)
+        }
+
+        if (enchants.isEmpty()) {
+            return null
+        }
+
+        val builder = StringBuilder()
+
+        for ((enchant, level) in enchants) {
+            builder.append("${enchant.key.key}:$level ")
+        }
+
+        return builder.toString().trimEnd()
+    }
 }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserFlag.kt

@@ -11,7 +11,7 @@ class ArgParserFlag : LookupArgParser {
         val flags = mutableSetOf<ItemFlag>()
 
         for (arg in args) {
-            val flag = kotlin.runCatching { ItemFlag.valueOf(arg.uppercase()) }.getOrNull() ?: continue
+            val flag = runCatching { ItemFlag.valueOf(arg.uppercase()) }.getOrNull() ?: continue
             flags.add(flag)
         }
 
@@ -27,4 +27,14 @@ class ArgParserFlag : LookupArgParser {
             testMeta.itemFlags.containsAll(flags)
         }
     }
-}
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        val flags = meta.itemFlags
+
+        if (flags.isEmpty()) {
+            return null
+        }
+
+        return flags.joinToString(" ") { it.name.lowercase() }
+    }
+}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserName.kt

@@ -30,4 +30,12 @@ class ArgParserName : LookupArgParser {
             testMeta.displayName == formatted
         }
     }
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        if (!meta.hasDisplayName()) {
+            return null
+        }
+
+        return "name:\"${meta.displayName}\""
+    }
 }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserTexture.kt

@@ -36,4 +36,12 @@ class ArgParserTexture : LookupArgParser {
             texture == SkullUtils.getSkullTexture(testMeta)
         }
     }
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        if (meta !is SkullMeta) {
+            return null
+        }
+
+        return "texture:${SkullUtils.getSkullTexture(meta)}"
+    }
 }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/items/ArgParserUnbreakable.kt

@@ -27,4 +27,12 @@ class ArgParserUnbreakable : LookupArgParser {
             testMeta.isUnbreakable
         }
     }
+
+    override fun serializeBack(meta: ItemMeta): String? {
+        if (!meta.isUnbreakable) {
+            return null
+        }
+
+        return "unbreakable"
+    }
 }

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/logging/EcoLogger.kt

@@ -2,24 +2,17 @@ package com.willfp.eco.internal.logging
 
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.util.StringUtils
+import org.bukkit.Bukkit
 import java.util.logging.Level
 import java.util.logging.Logger
 
-class EcoLogger(plugin: EcoPlugin) : Logger(plugin.name, null as String?) {
+class EcoLogger(private val plugin: EcoPlugin) : Logger(plugin.name, null as String?) {
     override fun info(msg: String) {
-        super.info(StringUtils.format(msg))
-    }
-
-    override fun warning(msg: String) {
-        super.warning(StringUtils.format(msg))
-    }
-
-    override fun severe(msg: String) {
-        super.severe(StringUtils.format(msg))
+        Bukkit.getConsoleSender().sendMessage("[${plugin.name}] ${StringUtils.format(msg)}")
     }
 
     init {
         parent = plugin.server.logger
         this.level = Level.ALL
     }
-}
+}

eco-core/core-nms/nms-common/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/common/NMSCommons.kt

@@ -4,12 +4,17 @@ import com.willfp.eco.core.entities.ai.EntityGoal
 import com.willfp.eco.core.entities.ai.TargetGoal
 import com.willfp.eco.internal.spigot.proxy.common.ai.EntityGoalFactory
 import com.willfp.eco.internal.spigot.proxy.common.ai.TargetGoalFactory
+import net.minecraft.core.Registry
+import net.minecraft.nbt.CompoundTag
 import net.minecraft.resources.ResourceLocation
 import net.minecraft.world.entity.LivingEntity
 import net.minecraft.world.entity.PathfinderMob
+import net.minecraft.world.item.Item
+import org.bukkit.Material
 import org.bukkit.NamespacedKey
 import org.bukkit.entity.Mob
 import org.bukkit.inventory.ItemStack
+import org.bukkit.persistence.PersistentDataContainer
 
 private lateinit var impl: CommonsProvider
 
@@ -39,9 +44,27 @@ fun <T : EntityGoal<*>> T.getVersionSpecificEntityGoalFactory(): EntityGoalFacto
 fun <T : TargetGoal<*>> T.getVersionSpecificEntityGoalFactory(): TargetGoalFactory<T>? =
     impl.getVersionSpecificTargetGoalFactory(this)
 
+private val MATERIAL_TO_ITEM = mutableMapOf<Material, Item>()
+
+fun Material.toItem(): Item =
+    MATERIAL_TO_ITEM.getOrPut(this) {
+        Registry.ITEM.getOptional(this.key.toResourceLocation())
+            .orElseThrow { IllegalArgumentException("Material is not item!") }
+    }
+
+fun CompoundTag.makePdc(base: Boolean = false): PersistentDataContainer =
+    impl.makePdc(this, base)
+
+fun CompoundTag.setPdc(pdc: PersistentDataContainer?, item: net.minecraft.world.item.ItemStack? = null) =
+    impl.setPdc(this, pdc, item)
+
 interface CommonsProvider {
     val nbtTagString: Int
 
+    fun makePdc(tag: CompoundTag, base: Boolean): PersistentDataContainer
+
+    fun setPdc(tag: CompoundTag, pdc: PersistentDataContainer?, item: net.minecraft.world.item.ItemStack? = null)
+
     fun toPathfinderMob(mob: Mob): PathfinderMob?
 
     fun toResourceLocation(namespacedKey: NamespacedKey): ResourceLocation

eco-core/core-nms/nms-common/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/common/ai/entity/TemptGoalFactory.kt

@@ -10,9 +10,6 @@ import net.minecraft.world.entity.PathfinderMob
 import net.minecraft.world.entity.ai.goal.Goal
 import net.minecraft.world.entity.ai.goal.TemptGoal
 import net.minecraft.world.entity.ai.targeting.TargetingConditions
-import org.bukkit.craftbukkit.v1_17_R1.entity.CraftLivingEntity
-import org.bukkit.craftbukkit.v1_17_R1.event.CraftEventFactory
-import org.bukkit.event.entity.EntityTargetEvent
 import java.util.EnumSet
 import kotlin.math.abs
 
@@ -57,19 +54,6 @@ class EnhancedTemptGoal(
             false
         } else {
             player = mob.level.getNearestPlayer(targetingConditions, mob as LivingEntity)
-            // CraftBukkit start
-            if (player != null) {
-                val event = CraftEventFactory.callEntityTargetLivingEvent(
-                    mob,
-                    player,
-                    EntityTargetEvent.TargetReason.TEMPT
-                )
-                if (event.isCancelled) {
-                    return false
-                }
-                player = if (event.target == null) null else (event.target as CraftLivingEntity?)!!.handle
-            }
-            // CraftBukkit end
             player != null
         }
     }

eco-core/core-nms/nms-common/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/common/ai/opengoals/Spellcaster.kt

@@ -5,7 +5,6 @@ import net.minecraft.world.entity.EntityType
 import net.minecraft.world.entity.LivingEntity
 import net.minecraft.world.entity.ai.goal.Goal
 import net.minecraft.world.entity.monster.SpellcasterIllager
-import org.bukkit.craftbukkit.v1_17_R1.event.CraftEventFactory
 
 @Suppress("UNCHECKED_CAST")
 class DelegatedSpellcaster(private val handle: SpellcasterIllager) : SpellcasterIllager(
@@ -66,15 +65,6 @@ abstract class OpenUseSpellGoal(
     override fun tick() {
         --attackWarmupDelay
         if (attackWarmupDelay == 0) {
-            // CraftBukkit start
-            if (!CraftEventFactory.handleEntitySpellCastEvent(
-                    handle,
-                    spell
-                )
-            ) {
-                return
-            }
-            // CraftBukkit end
             performSpellCasting()
             handle.playSound(openHandle.openCastingSoundEvent, 1.0f, 1.0f)
         }

eco-core/core-nms/nms-common/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/common/fast/EcoFastItemStack.kt

@@ -3,25 +3,34 @@ package com.willfp.eco.internal.spigot.proxy.common.fast
 import com.willfp.eco.core.fast.FastItemStack
 import com.willfp.eco.internal.spigot.proxy.common.NBT_TAG_STRING
 import com.willfp.eco.internal.spigot.proxy.common.asNMSStack
+import com.willfp.eco.internal.spigot.proxy.common.makePdc
 import com.willfp.eco.internal.spigot.proxy.common.mergeIfNeeded
+import com.willfp.eco.internal.spigot.proxy.common.setPdc
+import com.willfp.eco.internal.spigot.proxy.common.toItem
 import com.willfp.eco.util.NamespacedKeyUtils
 import com.willfp.eco.util.StringUtils
+import com.willfp.eco.util.toComponent
+import com.willfp.eco.util.toLegacy
+import net.kyori.adventure.text.Component
 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.Items
+import org.bukkit.NamespacedKey
 import org.bukkit.enchantments.Enchantment
 import org.bukkit.inventory.ItemFlag
+import org.bukkit.persistence.PersistentDataContainer
+import org.bukkit.persistence.PersistentDataType
 import kotlin.experimental.and
 
 @Suppress("UsePropertyAccessSyntax")
 class EcoFastItemStack(
     private val bukkit: org.bukkit.inventory.ItemStack
 ) : FastItemStack {
-    private var loreCache: List<String>? = null
     private val handle = bukkit.asNMSStack()
+    private val pdc = (if (handle.hasTag()) handle.getTag()!! else CompoundTag()).makePdc()
 
     override fun getEnchants(checkStored: Boolean): Map<Enchantment, Int> {
         val enchantmentNBT =
@@ -41,7 +50,7 @@ class EcoFastItemStack(
         return foundEnchantments
     }
 
-    override fun getLevelOnItem(
+    override fun getEnchantmentLevel(
         enchantment: Enchantment,
         checkStored: Boolean
     ): Int {
@@ -60,13 +69,14 @@ class EcoFastItemStack(
         return 0
     }
 
-    override fun setLore(lore: List<String>?) {
-        loreCache = null
-        val jsonLore: MutableList<String> = ArrayList()
+    override fun setLore(lore: List<String>?) = setLoreComponents(lore?.map { it.toComponent() })
+
+    override fun setLoreComponents(lore: List<Component>?) {
+        val jsonLore = mutableListOf<String>()
 
         if (lore != null) {
             for (s in lore) {
-                jsonLore.add(StringUtils.legacyToJson(s))
+                jsonLore.add(StringUtils.componentToJson(s))
             }
         }
 
@@ -87,17 +97,7 @@ class EcoFastItemStack(
         apply()
     }
 
-    override fun getLore(): List<String> {
-        if (loreCache != null) {
-            return loreCache!!
-        }
-
-        val lore = this.getLoreJSON().map { StringUtils.jsonToLegacy(it) }
-        loreCache = lore
-        return lore
-    }
-
-    private fun getLoreJSON(): List<String> {
+    override fun getLoreComponents(): List<Component> {
         val displayTag = handle.getTagElement("display") ?: return emptyList()
 
         if (!displayTag.contains("Lore")) {
@@ -105,15 +105,47 @@ class EcoFastItemStack(
         }
 
         val loreTag = displayTag.getList("Lore", NBT_TAG_STRING)
-        val lore = ArrayList<String>(loreTag.size)
+        val jsonLore = mutableListOf<String>()
 
         for (i in loreTag.indices) {
-            lore.add(loreTag.getString(i))
+            jsonLore.add(loreTag.getString(i))
         }
 
-        return lore
+        return jsonLore.map { StringUtils.jsonToComponent(it) }
     }
 
+    override fun getLore(): List<String> =
+        getLoreComponents().map { StringUtils.toLegacy(it) }
+
+    override fun setDisplayName(name: Component?) {
+        val displayTag = handle.getOrCreateTagElement("display")
+
+        displayTag.remove("Name")
+
+        if (name != null) {
+            displayTag.put("Name", StringTag.valueOf(StringUtils.componentToJson(name)))
+        }
+
+        apply()
+    }
+
+    override fun setDisplayName(name: String?) = setDisplayName(name?.toComponent())
+
+    override fun getDisplayNameComponent(): Component {
+        val displayTag =
+            handle.getTagElement("display") ?: return Component.translatable(bukkit.type.toItem().getDescriptionId())
+
+        if (!displayTag.contains("Name")) {
+            return Component.translatable(bukkit.type.toItem().getDescriptionId())
+        }
+
+        val nameTag = displayTag.getString("Name")
+
+        return StringUtils.jsonToComponent(nameTag)
+    }
+
+    override fun getDisplayName(): String = displayNameComponent.toLegacy()
+
     override fun addItemFlags(vararg hideFlags: ItemFlag) {
         for (flag in hideFlags) {
             this.flagBits = this.flagBits or getBitModifier(flag)
@@ -151,6 +183,14 @@ class EcoFastItemStack(
         return this.flagBits and bitModifier == bitModifier
     }
 
+    override fun getBaseTag(): PersistentDataContainer =
+        (if (handle.hasTag()) handle.getTag()!! else CompoundTag()).makePdc(base = true)
+
+    override fun setBaseTag(container: PersistentDataContainer?) {
+        (if (handle.hasTag()) handle.getTag()!! else CompoundTag()).setPdc(container, item = handle)
+        apply()
+    }
+
     @Suppress("UNNECESSARY_NOT_NULL_ASSERTION")
     private var flagBits: Int
         get() =
@@ -170,6 +210,10 @@ class EcoFastItemStack(
         handle.setRepairCost(cost)
     }
 
+    override fun getPersistentDataContainer(): PersistentDataContainer {
+        return ContinuallyAppliedPersistentDataContainer(this.pdc, this)
+    }
+
     override fun equals(other: Any?): Boolean {
         if (other !is EcoFastItemStack) {
             return false
@@ -183,7 +227,11 @@ class EcoFastItemStack(
         return handle.getTag()?.hashCode() ?: (0b00010101 * 31 + Item.getId(handle.getItem()))
     }
 
-    private fun apply() {
+    internal fun apply() {
+        if (handle.hasTag()) {
+            handle.getTag()?.setPdc(this.pdc)
+        }
+
         bukkit.mergeIfNeeded(handle)
     }
 
@@ -195,3 +243,18 @@ class EcoFastItemStack(
         return bukkit
     }
 }
+
+private class ContinuallyAppliedPersistentDataContainer(
+    val handle: PersistentDataContainer,
+    val fis: EcoFastItemStack
+) : PersistentDataContainer by handle {
+    override fun <T : Any, Z : Any> set(key: NamespacedKey, type: PersistentDataType<T, Z>, value: Z) {
+        handle.set(key, type, value)
+        fis.apply()
+    }
+
+    override fun remove(key: NamespacedKey) {
+        handle.remove(key)
+        fis.apply()
+    }
+}

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

@@ -62,7 +62,8 @@ class ChatComponent : ChatComponentProxy {
         }
 
         val newShowItem = showItem.nbt(
-            BinaryTagHolder.binaryTagHolder(
+            @Suppress("UnstableApiUsage", "DEPRECATION")
+            BinaryTagHolder.of(
                 CraftItemStack.asNMSCopy(
                     Display.display(
                         CraftItemStack.asBukkitCopy(

eco-core/core-nms/v1_17_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_17_R1/CommonsInitializer.kt

@@ -2,6 +2,8 @@ package com.willfp.eco.internal.spigot.proxy.v1_17_R1
 
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.nbt.Tag
 import net.minecraft.resources.ResourceLocation
 import net.minecraft.world.entity.PathfinderMob
 import org.bukkit.Bukkit
@@ -10,11 +12,14 @@ import org.bukkit.craftbukkit.v1_17_R1.CraftServer
 import org.bukkit.craftbukkit.v1_17_R1.entity.CraftEntity
 import org.bukkit.craftbukkit.v1_17_R1.entity.CraftMob
 import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack
+import org.bukkit.craftbukkit.v1_17_R1.persistence.CraftPersistentDataContainer
+import org.bukkit.craftbukkit.v1_17_R1.persistence.CraftPersistentDataTypeRegistry
 import org.bukkit.craftbukkit.v1_17_R1.util.CraftMagicNumbers
 import org.bukkit.craftbukkit.v1_17_R1.util.CraftNamespacedKey
 import org.bukkit.entity.LivingEntity
 import org.bukkit.entity.Mob
 import org.bukkit.inventory.ItemStack
+import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
@@ -27,6 +32,11 @@ class CommonsInitializer : CommonsInitializerProxy {
             isAccessible = true
         }
 
+        private val pdcRegsitry = Class.forName("org.bukkit.craftbukkit.v1_17_R1.inventory.CraftMetaItem")
+            .getDeclaredField("DATA_TYPE_REGISTRY")
+            .apply { isAccessible = true }
+            .get(null) as CraftPersistentDataTypeRegistry
+
         override val nbtTagString = CraftMagicNumbers.NBT.TAG_STRING
 
         override fun toPathfinderMob(mob: Mob): PathfinderMob? {
@@ -57,5 +67,66 @@ class CommonsInitializer : CommonsInitializerProxy {
 
         override fun toBukkitEntity(entity: net.minecraft.world.entity.LivingEntity): LivingEntity? =
             CraftEntity.getEntity(Bukkit.getServer() as CraftServer, entity) as? LivingEntity
+
+        override fun makePdc(tag: CompoundTag, base: Boolean): PersistentDataContainer {
+            fun emptyPdc(): CraftPersistentDataContainer = CraftPersistentDataContainer(pdcRegsitry)
+
+            fun CompoundTag?.toPdc(): PersistentDataContainer {
+                val pdc = emptyPdc()
+                this ?: return pdc
+                val keys = this.allKeys
+                for (key in keys) {
+                    pdc.put(key, this[key])
+                }
+
+                return pdc
+            }
+
+            return if (base) {
+                tag.toPdc()
+            } else {
+                if (tag.contains("PublicBukkitValues")) {
+                    tag.getCompound("PublicBukkitValues").toPdc()
+                } else {
+                    emptyPdc()
+                }
+            }
+        }
+
+        override fun setPdc(
+            tag: CompoundTag,
+            pdc: PersistentDataContainer?,
+            item: net.minecraft.world.item.ItemStack?
+        ) {
+            fun CraftPersistentDataContainer.toTag(): CompoundTag {
+                val compound = CompoundTag()
+                val rawPublicMap: Map<String, Tag> = this.raw
+                for ((key, value) in rawPublicMap) {
+                    compound.put(key, value)
+                }
+
+                return compound
+            }
+
+            pdc as CraftPersistentDataContainer?
+
+            if (item != null) {
+                if (pdc != null && !pdc.isEmpty) {
+                    for (key in tag.allKeys.toSet()) {
+                        tag.remove(key)
+                    }
+
+                    tag.merge(pdc.toTag())
+                } else {
+                    item.setTag(null)
+                }
+            } else {
+                if (pdc != null && !pdc.isEmpty) {
+                    tag.put("PublicBukkitValues", pdc.toTag())
+                } else {
+                    tag.remove("PublicBukkitValues")
+                }
+            }
+        }
     }
 }

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

@@ -39,6 +39,6 @@ class Skull : SkullProxy {
         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
+        return prop.toMutableList().firstOrNull()?.value
     }
 }

eco-core/core-nms/v1_18_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R1/ChatComponent.kt

@@ -62,7 +62,8 @@ class ChatComponent : ChatComponentProxy {
         }
 
         val newShowItem = showItem.nbt(
-            BinaryTagHolder.binaryTagHolder(
+            @Suppress("UnstableApiUsage", "DEPRECATION")
+            BinaryTagHolder.of(
                 CraftItemStack.asNMSCopy(
                     Display.display(
                         CraftItemStack.asBukkitCopy(

eco-core/core-nms/v1_18_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R1/CommonsInitializer.kt

@@ -2,6 +2,8 @@ package com.willfp.eco.internal.spigot.proxy.v1_18_R1
 
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.nbt.Tag
 import net.minecraft.resources.ResourceLocation
 import net.minecraft.world.entity.PathfinderMob
 import org.bukkit.Bukkit
@@ -10,11 +12,14 @@ import org.bukkit.craftbukkit.v1_18_R1.CraftServer
 import org.bukkit.craftbukkit.v1_18_R1.entity.CraftEntity
 import org.bukkit.craftbukkit.v1_18_R1.entity.CraftMob
 import org.bukkit.craftbukkit.v1_18_R1.inventory.CraftItemStack
+import org.bukkit.craftbukkit.v1_18_R1.persistence.CraftPersistentDataContainer
+import org.bukkit.craftbukkit.v1_18_R1.persistence.CraftPersistentDataTypeRegistry
 import org.bukkit.craftbukkit.v1_18_R1.util.CraftMagicNumbers
 import org.bukkit.craftbukkit.v1_18_R1.util.CraftNamespacedKey
 import org.bukkit.entity.LivingEntity
 import org.bukkit.entity.Mob
 import org.bukkit.inventory.ItemStack
+import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
@@ -27,6 +32,11 @@ class CommonsInitializer : CommonsInitializerProxy {
             isAccessible = true
         }
 
+        private val pdcRegsitry = Class.forName("org.bukkit.craftbukkit.v1_18_R1.inventory.CraftMetaItem")
+            .getDeclaredField("DATA_TYPE_REGISTRY")
+            .apply { isAccessible = true }
+            .get(null) as CraftPersistentDataTypeRegistry
+
         override val nbtTagString = CraftMagicNumbers.NBT.TAG_STRING
 
         override fun toPathfinderMob(mob: Mob): PathfinderMob? {
@@ -57,5 +67,66 @@ class CommonsInitializer : CommonsInitializerProxy {
 
         override fun toBukkitEntity(entity: net.minecraft.world.entity.LivingEntity): LivingEntity? =
             CraftEntity.getEntity(Bukkit.getServer() as CraftServer, entity) as? LivingEntity
+
+        override fun makePdc(tag: CompoundTag, base: Boolean): PersistentDataContainer {
+            fun emptyPdc(): CraftPersistentDataContainer = CraftPersistentDataContainer(pdcRegsitry)
+
+            fun CompoundTag?.toPdc(): PersistentDataContainer {
+                val pdc = emptyPdc()
+                this ?: return pdc
+                val keys = this.allKeys
+                for (key in keys) {
+                    pdc.put(key, this[key])
+                }
+
+                return pdc
+            }
+
+            return if (base) {
+                tag.toPdc()
+            } else {
+                if (tag.contains("PublicBukkitValues")) {
+                    tag.getCompound("PublicBukkitValues").toPdc()
+                } else {
+                    emptyPdc()
+                }
+            }
+        }
+
+        override fun setPdc(
+            tag: CompoundTag,
+            pdc: PersistentDataContainer?,
+            item: net.minecraft.world.item.ItemStack?
+        ) {
+            fun CraftPersistentDataContainer.toTag(): CompoundTag {
+                val compound = CompoundTag()
+                val rawPublicMap: Map<String, Tag> = this.raw
+                for ((key, value) in rawPublicMap) {
+                    compound.put(key, value)
+                }
+
+                return compound
+            }
+
+            pdc as CraftPersistentDataContainer?
+
+            if (item != null) {
+                if (pdc != null && !pdc.isEmpty) {
+                    for (key in tag.allKeys.toSet()) {
+                        tag.remove(key)
+                    }
+
+                    tag.merge(pdc.toTag())
+                } else {
+                    item.setTag(null)
+                }
+            } else {
+                if (pdc != null && !pdc.isEmpty) {
+                    tag.put("PublicBukkitValues", pdc.toTag())
+                } else {
+                    tag.remove("PublicBukkitValues")
+                }
+            }
+        }
     }
 }

eco-core/core-nms/v1_18_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R1/Skull.kt

@@ -39,6 +39,6 @@ class Skull : SkullProxy {
         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
+        return prop.toMutableList().firstOrNull()?.value
     }
 }

eco-core/core-nms/v1_18_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R2/CommonsInitializer.kt

@@ -2,6 +2,8 @@ package com.willfp.eco.internal.spigot.proxy.v1_18_R2
 
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.nbt.Tag
 import net.minecraft.resources.ResourceLocation
 import net.minecraft.world.entity.PathfinderMob
 import org.bukkit.Bukkit
@@ -10,11 +12,14 @@ import org.bukkit.craftbukkit.v1_18_R2.CraftServer
 import org.bukkit.craftbukkit.v1_18_R2.entity.CraftEntity
 import org.bukkit.craftbukkit.v1_18_R2.entity.CraftMob
 import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftItemStack
+import org.bukkit.craftbukkit.v1_18_R2.persistence.CraftPersistentDataContainer
+import org.bukkit.craftbukkit.v1_18_R2.persistence.CraftPersistentDataTypeRegistry
 import org.bukkit.craftbukkit.v1_18_R2.util.CraftMagicNumbers
 import org.bukkit.craftbukkit.v1_18_R2.util.CraftNamespacedKey
 import org.bukkit.entity.LivingEntity
 import org.bukkit.entity.Mob
 import org.bukkit.inventory.ItemStack
+import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
@@ -27,6 +32,11 @@ class CommonsInitializer : CommonsInitializerProxy {
             isAccessible = true
         }
 
+        private val pdcRegsitry = Class.forName("org.bukkit.craftbukkit.v1_18_R2.inventory.CraftMetaItem")
+            .getDeclaredField("DATA_TYPE_REGISTRY")
+            .apply { isAccessible = true }
+            .get(null) as CraftPersistentDataTypeRegistry
+
         override val nbtTagString = CraftMagicNumbers.NBT.TAG_STRING
 
         override fun toPathfinderMob(mob: Mob): PathfinderMob? {
@@ -57,5 +67,66 @@ class CommonsInitializer : CommonsInitializerProxy {
 
         override fun toBukkitEntity(entity: net.minecraft.world.entity.LivingEntity): LivingEntity? =
             CraftEntity.getEntity(Bukkit.getServer() as CraftServer, entity) as? LivingEntity
+
+        override fun makePdc(tag: CompoundTag, base: Boolean): PersistentDataContainer {
+            fun emptyPdc(): CraftPersistentDataContainer = CraftPersistentDataContainer(pdcRegsitry)
+
+            fun CompoundTag?.toPdc(): PersistentDataContainer {
+                val pdc = emptyPdc()
+                this ?: return pdc
+                val keys = this.allKeys
+                for (key in keys) {
+                    pdc.put(key, this[key])
+                }
+
+                return pdc
+            }
+
+            return if (base) {
+                tag.toPdc()
+            } else {
+                if (tag.contains("PublicBukkitValues")) {
+                    tag.getCompound("PublicBukkitValues").toPdc()
+                } else {
+                    emptyPdc()
+                }
+            }
+        }
+
+        override fun setPdc(
+            tag: CompoundTag,
+            pdc: PersistentDataContainer?,
+            item: net.minecraft.world.item.ItemStack?
+        ) {
+            fun CraftPersistentDataContainer.toTag(): CompoundTag {
+                val compound = CompoundTag()
+                val rawPublicMap: Map<String, Tag> = this.raw
+                for ((key, value) in rawPublicMap) {
+                    compound.put(key, value)
+                }
+
+                return compound
+            }
+
+            pdc as CraftPersistentDataContainer?
+
+            if (item != null) {
+                if (pdc != null && !pdc.isEmpty) {
+                    for (key in tag.allKeys.toSet()) {
+                        tag.remove(key)
+                    }
+
+                    tag.merge(pdc.toTag())
+                } else {
+                    item.setTag(null)
+                }
+            } else {
+                if (pdc != null && !pdc.isEmpty) {
+                    tag.put("PublicBukkitValues", pdc.toTag())
+                } else {
+                    tag.remove("PublicBukkitValues")
+                }
+            }
+        }
     }
 }

eco-core/core-nms/v1_18_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_18_R2/Skull.kt

@@ -39,6 +39,6 @@ class Skull : SkullProxy {
         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
+        return prop.toMutableList().firstOrNull()?.value
     }
 }

eco-core/core-plugin/build.gradle

@@ -2,13 +2,23 @@ group 'com.willfp'
 version rootProject.version
 
 dependencies {
-    implementation 'com.github.Redempt:Crunch:1.1.2'
-    compileOnly 'net.kyori:adventure-platform-bukkit:4.1.0'
-    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")
+
+    // Libraries
+    implementation 'com.github.Redempt:Crunch:1.1.2'
+    implementation 'mysql:mysql-connector-java:8.0.25'
+    implementation 'org.jetbrains.exposed:exposed-core:0.37.3'
+    implementation 'org.jetbrains.exposed:exposed-dao:0.37.3'
+    implementation 'org.jetbrains.exposed:exposed-jdbc:0.37.3'
+    implementation 'com.zaxxer:HikariCP:5.0.0'
+    implementation 'net.kyori:adventure-platform-bukkit:4.1.0'
+
+    // Included in spigot jar
+    compileOnly 'com.google.code.gson:gson:2.8.8'
+    compileOnly 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'
+
+    // Plugin dependencies
     compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.1-SNAPSHOT'
     compileOnly 'com.sk89q.worldguard:worldguard-bukkit:7.0.7-SNAPSHOT'
     compileOnly 'com.github.TechFortress:GriefPrevention:16.17.1'
@@ -26,33 +36,28 @@ dependencies {
     compileOnly 'com.github.brcdev-minecraft:shopgui-api:2.2.0'
     compileOnly 'com.github.LoneDev6:API-ItemsAdder:2.4.7'
     compileOnly 'com.arcaniax:HeadDatabase-API:1.3.0'
-    compileOnly 'org.jetbrains.exposed:exposed-core:0.37.3'
-    compileOnly 'org.jetbrains.exposed:exposed-dao:0.37.3'
-    compileOnly 'org.jetbrains.exposed:exposed-jdbc:0.37.3'
-    compileOnly 'mysql:mysql-connector-java:8.0.25'
-    compileOnly 'com.zaxxer:HikariCP:5.0.0'
     compileOnly 'com.gmail.filoghost.holographicdisplays:holographicdisplays-api:2.4.0'
     compileOnly 'com.github.EssentialsX:Essentials:2.18.2'
     compileOnly 'com.bgsoftware:SuperiorSkyblockAPI:1.8.3'
     compileOnly 'com.github.MilkBowl:VaultAPI:1.7'
-    compileOnly 'world.bentobox:bentobox:1.17.3-SNAPSHOT'
-    compileOnly 'com.iridium:IridiumSkyblock:3.1.2'
     compileOnly 'com.github.WhipDevelopment:CrashClaim:f9cd7d92eb'
     compileOnly 'com.wolfyscript.wolfyutilities:wolfyutilities:3.16.0.0'
     compileOnly 'com.github.decentsoftware-eu:decentholograms:2.1.2'
-    compileOnly 'io.lumine.xikage:MythicMobs:4.9.1'
+
+    // MythicMobs
+    compileOnly 'io.lumine:Mythic:5.0.1'
+    compileOnly 'io.lumine:LumineUtils:1.16.1-SNAPSHOT'
 
     // CombatLogX V10 + NewbieHelper Expansion
     compileOnly 'com.SirBlobman.combatlogx:CombatLogX-API:10.0.0.0-SNAPSHOT'
-    compileOnly 'com.SirBlobman.combatlogx.expansions:NewbieHelper:10.0.0.0-SNAPSHOT'
 
     // CombatLogX V11 + NewbieHelper Expansion
     compileOnly 'com.github.sirblobman.combatlogx:api:11.0.0.0-SNAPSHOT'
-    compileOnly 'com.github.sirblobman.combatlogx.expansion:newbie-helper:11.0.0.0-SNAPSHOT'
 
     // LibsDisguises
     compileOnly 'LibsDisguises:LibsDisguises:10.0.26'
 
+    // All other libs
     compileOnly fileTree(dir: '../../lib', include: ['*.jar'])
 }
 

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

@@ -10,7 +10,7 @@ import com.willfp.eco.internal.EcoCleaner
 import com.willfp.eco.internal.EcoPropsParser
 import com.willfp.eco.internal.Plugins
 import com.willfp.eco.internal.config.EcoConfigFactory
-import com.willfp.eco.internal.config.updating.EcoConfigHandler
+import com.willfp.eco.internal.config.EcoConfigHandler
 import com.willfp.eco.internal.drops.EcoDropQueueFactory
 import com.willfp.eco.internal.events.EcoEventManager
 import com.willfp.eco.internal.extensions.EcoExtensionLoader

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

@@ -178,6 +178,8 @@ abstract class EcoSpigotPlugin : EcoPlugin() {
 
         NumberUtils.initCrunch { expression, player, statics -> evaluateExpression(expression, player, statics) }
 
+        CustomItemsManager.registerProviders()
+
         postInit()
     }
 

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

@@ -10,5 +10,6 @@ class DataYml(
     "data",
     plugin,
     false,
-    ConfigType.YAML
+    ConfigType.YAML,
+    false
 )

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

@@ -27,7 +27,7 @@ abstract class EcoProfile(
             return this.data[key] as T
         }
 
-        this.data[key] = handler.read(uuid, key.key) ?: key.defaultValue
+        this.data[key] = handler.read(uuid, key) ?: key.defaultValue
         return read(key)
     }
 
@@ -36,11 +36,11 @@ abstract class EcoProfile(
             return false
         }
 
-        return this.data == other.data && this.uuid == other.uuid
+        return this.uuid == other.uuid
     }
 
     override fun hashCode(): Int {
-        return this.data.hashCode()
+        return this.uuid.hashCode()
     }
 
     companion object {

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

@@ -23,5 +23,5 @@ interface DataHandler {
 
     fun <T> write(uuid: UUID, key: NamespacedKey, value: T)
     fun saveKeysFor(uuid: UUID, keys: Set<PersistentDataKey<*>>)
-    fun <T> read(uuid: UUID, key: NamespacedKey): T?
+    fun <T> read(uuid: UUID, key: PersistentDataKey<T>): T?
 }

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

@@ -45,6 +45,7 @@ class MySQLDataHandler(
     private val serverHandler: ImplementedMySQLHandler
 
     init {
+
         val config = HikariConfig()
         config.driverClassName = "com.mysql.cj.jdbc.Driver"
         config.username = plugin.configYml.getString("mysql.user")
@@ -102,9 +103,9 @@ class MySQLDataHandler(
         }
     }
 
-    override fun <T> read(uuid: UUID, key: NamespacedKey): T? {
+    override fun <T> read(uuid: UUID, key: PersistentDataKey<T>): T? {
         return applyFor(uuid) {
-            it.read(uuid, key)
+            it.read(uuid, key.key)
         }
     }
 

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

@@ -1,6 +1,7 @@
 package com.willfp.eco.internal.spigot.data.storage
 
 import com.willfp.eco.core.data.keys.PersistentDataKey
+import com.willfp.eco.core.data.keys.PersistentDataKeyType
 import com.willfp.eco.internal.spigot.EcoSpigotPlugin
 import com.willfp.eco.internal.spigot.data.EcoProfileHandler
 import org.bukkit.NamespacedKey
@@ -37,7 +38,15 @@ class YamlDataHandler(
         dataYml.set("player.$uuid.$key", value)
     }
 
-    override fun <T> read(uuid: UUID, key: NamespacedKey): T? {
-        return dataYml.get("player.$uuid.$key") as T?
+    override fun <T> read(uuid: UUID, key: PersistentDataKey<T>): T? {
+        val value = when (key.type) {
+            PersistentDataKeyType.INT -> dataYml.getIntOrNull("player.$uuid.${key.key}")
+            PersistentDataKeyType.DOUBLE -> dataYml.getDoubleOrNull("player.$uuid.${key.key}")
+            PersistentDataKeyType.STRING -> dataYml.getStringOrNull("player.$uuid.${key.key}")
+            PersistentDataKeyType.BOOLEAN -> dataYml.getBoolOrNull("player.$uuid.${key.key}")
+            else -> null
+        } as? T?
+
+        return value
     }
 }