Fixed display

# Conflicts:
#	eco-api/src/main/java/com/willfp/eco/internal/config/AbstractConfig.java
#	eco-api/src/main/java/com/willfp/eco/internal/config/ConfigSection.java
#	eco-api/src/main/java/com/willfp/eco/internal/config/ConfigWrapper.java
#	eco-api/src/main/java/com/willfp/eco/util/SerializationUtils.java
#	eco-api/src/main/java/com/willfp/eco/util/config/Config.java
#	eco-api/src/main/java/com/willfp/eco/util/config/StaticOptionalConfig.java
#	eco-api/src/main/java/com/willfp/eco/util/serialization/Deserializer.java
#	eco-api/src/main/java/com/willfp/eco/util/serialization/EcoSerializable.java
#	eco-api/src/main/java/com/willfp/eco/util/serialization/NoRegisteredDeserializerException.java

.gitignore

@@ -14,7 +14,7 @@ bin/
 # Gradle
 .gradle
 **/build/
-!src/**/build/
+!eco-api/src/**/build/
 .gradletasknamecache
 !gradle-wrapper.jar
 gradle-app.setting

build.gradle

@@ -6,97 +6,94 @@ plugins {
 }
 
 dependencies {
-    implementation 'org.apache.maven:maven-artifact:3.0.3'
-    implementation 'org.bstats:bstats-bukkit:1.7'
-    compileOnly 'org.spigotmc:spigot-api:1.16.4-R0.1-SNAPSHOT'
-    compileOnly 'me.clip:placeholderapi:2.10.9'
-    compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'
-    compileOnly 'com.sk89q.worldguard:worldguard-bukkit:7.0.4-SNAPSHOT'
-    compileOnly 'com.github.TechFortress:GriefPrevention:16.14.0'
-    compileOnly 'com.massivecraft:Factions:1.6.9.5-U0.5.10'
-    compileOnly 'com.github.cryptomorin:kingdoms:1.10.3.1'
-    compileOnly 'com.github.TownyAdvanced:Towny:0.96.2.0'
-    compileOnly 'com.github.angeschossen:LandsAPI:4.7.3'
-    compileOnly 'fr.neatmonster:nocheatplus:3.16.1-SNAPSHOT'
-    compileOnly 'com.github.jiangdashao:matrix-api-repo:317d4635fd'
-    compileOnly 'org.jetbrains:annotations:19.0.0'
-    compileOnly fileTree(dir: '/lib', include: ['*.jar'])
-
-    // Lombok
-    compileOnly 'org.projectlombok:lombok:1.18.16'
-    annotationProcessor 'org.projectlombok:lombok:1.18.16'
-    testCompileOnly 'org.projectlombok:lombok:1.18.16'
-    testAnnotationProcessor 'org.projectlombok:lombok:1.18.16'
+    implementation project(":eco-api")
+    implementation project(":eco-core").getSubprojects()
 }
 
+allprojects {
+    apply plugin: 'java'
+    apply plugin: 'java-library'
+    apply plugin: 'maven-publish'
+    apply plugin: 'com.github.johnrengelman.shadow'
 
-repositories {
-    mavenCentral()
-    jcenter()
-    mavenLocal()
-    maven { url 'https://jitpack.io' }
+    repositories {
+        mavenCentral()
+        jcenter()
+        mavenLocal()
+        maven { url 'https://jitpack.io' }
 
-    // NMS (for jitpack compilation)
-    maven { url 'https://repo.codemc.org/repository/nms/' }
+        // NMS (for jitpack compilation)
+        maven { url 'https://repo.codemc.org/repository/nms/' }
 
-    // bStats
-    maven { url 'https://repo.codemc.org/repository/maven-public' }
+        // bStats, mcMMO
+        maven { url 'https://repo.codemc.org/repository/maven-public' }
 
-    // Spigot API
-    maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/' }
+        // Spigot API
+        maven { url 'https://hub.spigotmc.org/nexus/content/repositories/snapshots/' }
 
-    // PlaceholderAPI
-    maven { url 'https://repo.extendedclip.com/content/repositories/placeholderapi/' }
+        // PlaceholderAPI
+        maven { url 'https://repo.extendedclip.com/content/repositories/placeholderapi/' }
 
-    // ProtocolLib
-    maven { url 'https://repo.dmulloy2.net/nexus/repository/public/' }
+        // ProtocolLib
+        maven { url 'https://repo.dmulloy2.net/nexus/repository/public/' }
 
-    // WorldGuard
-    maven { url 'https://maven.enginehub.org/repo/' }
+        // WorldGuard
+        maven { url 'https://maven.enginehub.org/repo/' }
 
-    // FactionsUUID
-    maven { url 'https://ci.ender.zone/plugin/repository/everything/' }
+        // FactionsUUID
+        maven { url 'https://ci.ender.zone/plugin/repository/everything/' }
 
-    // NoCheatPlus
-    maven { url 'https://repo.md-5.net/content/repositories/snapshots/' }
-}
+        // NoCheatPlus
+        maven { url 'https://repo.md-5.net/content/repositories/snapshots/' }
 
-tasks.withType(JavaCompile) {
-    options.deprecation = true
-    options.encoding = 'UTF-8'
-}
-
-configurations.all {
-    exclude group: "org.codehaus.plexus", module: "plexus-utils"
-    exclude group: "com.mojang", module: "brigadier"
-    exclude group: "org.kitteh", module: "paste-gg-api"
-    exclude group: "org.spongepowered", module: "configurate-hocon"
-    exclude group: "com.darkblade12", module: "particleeffect"
-}
-
-shadowJar {
-    relocate('org.bstats.bukkit', 'com.willfp.eco.util.shaded.bstats')
-    relocate('org.apache.maven', 'com.willfp.eco.util.shaded.maven')
-}
-
-publishing {
-    publications {
-        shadow(MavenPublication) {
-            from components.java
-            artifact shadowJar
-        }
+        // CombatLogX
+        maven { url 'https://nexus.sirblobman.xyz/repository/public/' }
     }
+
+    dependencies {
+        compileOnly 'org.jetbrains:annotations:19.0.0'
+
+        // Lombok
+        compileOnly 'org.projectlombok:lombok:1.18.16'
+        annotationProcessor 'org.projectlombok:lombok:1.18.16'
+        testCompileOnly 'org.projectlombok:lombok:1.18.16'
+        testAnnotationProcessor 'org.projectlombok:lombok:1.18.16'
+    }
+
+    tasks.withType(JavaCompile) {
+        options.deprecation = true
+        options.encoding = 'UTF-8'
+    }
+
+    configurations.all {
+        exclude group: "org.codehaus.plexus", module: "plexus-utils"
+        exclude group: "com.mojang", module: "brigadier"
+        exclude group: "org.kitteh", module: "paste-gg-api"
+        exclude group: "org.spongepowered", module: "configurate-hocon"
+        exclude group: "com.darkblade12", module: "particleeffect"
+        exclude group: "com.github.cryptomorin", module: "XSeries"
+    }
+
+    shadowJar {
+        relocate('org.bstats.bukkit', 'com.willfp.eco.shaded.bstats')
+        relocate('org.apache.maven', 'com.willfp.eco.shaded.maven')
+    }
+
+    jar {
+        onlyIf { !sourceSets.main.allSource.files.isEmpty() }
+    }
+
+    compileJava {
+        onlyIf { !sourceSets.main.allSource.files.isEmpty() }
+    }
+
+    compileJava.options.encoding = 'UTF-8'
+    compileJava.dependsOn clean
+
+    build.dependsOn shadowJar
 }
 
-compileJava.options.encoding = 'UTF-8'
-compileJava.dependsOn clean
-
-publishToMavenLocal.dependsOn shadowJar
-
-build.dependsOn shadowJar
-build.dependsOn publishToMavenLocal
-
 group = 'com.willfp'
 archivesBaseName = project.name
-version = '1.0.1'
+version = findProperty("version")
 java.sourceCompatibility = JavaVersion.VERSION_1_8

config/checkstyle/checkstyle.xml

@@ -115,7 +115,6 @@
         <!-- Checks for imports                              -->
         <!-- See https://checkstyle.org/config_imports.html -->
         <module name="AvoidStarImport"/>
-        <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
         <module name="RedundantImport"/>
         <module name="UnusedImports">
             <property name="processJavadoc" value="true"/>

config/checkstyle/suppression.xml

@@ -5,6 +5,10 @@
         "http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
 
 <suppressions>
+    <!-- Internals don't need javadoc. -->
+    <suppress files="[\\/]internal[\\/]" checks="MissingJavadocMethod"/>
+    <suppress files="[\\/]internal[\\/]" checks="JavadocVariable"/>
+
     <!-- Modified version of library -->
     <suppress files="ArmorEquipEvent.java" checks="JavadocVariable"/>
     <suppress files="ArmorEquipEvent.java" checks="MissingJavadocMethod"/>

eco-api/build.gradle

@@ -0,0 +1,25 @@
+group 'com.willfp'
+version rootProject.version
+
+dependencies {
+    compileOnly 'org.spigotmc:spigot:1.16.4-R0.1-SNAPSHOT'
+    compileOnly 'org.apache.maven:maven-artifact:3.0.3'
+    compileOnly 'org.bstats:bstats-bukkit:1.7'
+    compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'
+    compileOnly 'me.clip:placeholderapi:2.10.9'
+}
+
+compileJava.options.encoding = 'UTF-8'
+compileJava.dependsOn clean
+
+build.dependsOn publishToMavenLocal
+
+publishing {
+    publications {
+        shadow(MavenPublication) {
+            from components.java
+            artifact shadowJar
+            artifactId 'eco'
+        }
+    }
+}

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.protocollib;
+package com.willfp.eco.core;
 
 import com.comphenix.protocol.PacketType;
 import com.comphenix.protocol.ProtocolLibrary;
@@ -6,8 +6,8 @@ import com.comphenix.protocol.events.ListenerPriority;
 import com.comphenix.protocol.events.PacketAdapter;
 import com.comphenix.protocol.events.PacketContainer;
 import com.comphenix.protocol.events.PacketEvent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
 import lombok.Getter;
+import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.Collections;
@@ -34,7 +34,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * @param priority The priority at which the adapter should be ran on packet send/receive.
      * @param postLoad If the packet adapter should be registered after the server has loaded.
      */
-    protected AbstractPacketAdapter(@NotNull final AbstractEcoPlugin plugin,
+    protected AbstractPacketAdapter(@NotNull final EcoPlugin plugin,
                                     @NotNull final PacketType type,
                                     @NotNull final ListenerPriority priority,
                                     final boolean postLoad) {
@@ -50,7 +50,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * @param type     The {@link PacketType} to listen for.
      * @param postLoad If the packet adapter should be registered after the server has loaded.
      */
-    protected AbstractPacketAdapter(@NotNull final AbstractEcoPlugin plugin,
+    protected AbstractPacketAdapter(@NotNull final EcoPlugin plugin,
                                     @NotNull final PacketType type,
                                     final boolean postLoad) {
         this(plugin, type, ListenerPriority.NORMAL, postLoad);
@@ -60,8 +60,10 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * The code that should be executed once the packet has been received.
      *
      * @param packet The packet.
+     * @param player The player.
      */
-    public void onReceive(@NotNull final PacketContainer packet) {
+    public void onReceive(@NotNull final PacketContainer packet,
+                          @NotNull final Player player) {
         // Empty rather than abstract as implementations don't need both
     }
 
@@ -69,8 +71,10 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
      * THe code that should be executed once the packet has been sent.
      *
      * @param packet The packet.
+     * @param player The player.
      */
-    public void onSend(@NotNull final PacketContainer packet) {
+    public void onSend(@NotNull final PacketContainer packet,
+                       @NotNull final Player player) {
         // Empty rather than abstract as implementations don't need both
     }
 
@@ -89,7 +93,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
             return;
         }
 
-        onReceive(event.getPacket());
+        onReceive(event.getPacket(), event.getPlayer());
     }
 
     /**
@@ -107,7 +111,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
             return;
         }
 
-        onSend(event.getPacket());
+        onSend(event.getPacket(), event.getPlayer());
     }
 
     /**

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

@@ -0,0 +1,416 @@
+package com.willfp.eco.core;
+
+import com.willfp.eco.core.command.AbstractCommand;
+import com.willfp.eco.core.config.base.ConfigYml;
+import com.willfp.eco.core.config.base.LangYml;
+import com.willfp.eco.internal.config.updating.ConfigHandler;
+import com.willfp.eco.core.display.Display;
+import com.willfp.eco.core.display.DisplayModule;
+import com.willfp.eco.core.events.EventManager;
+import com.willfp.eco.core.extensions.ExtensionLoader;
+import com.willfp.eco.core.factory.MetadataValueFactory;
+import com.willfp.eco.core.factory.NamespacedKeyFactory;
+import com.willfp.eco.core.factory.RunnableFactory;
+import com.willfp.eco.core.integrations.IntegrationLoader;
+import com.willfp.eco.core.integrations.placeholder.PlaceholderManager;
+import com.willfp.eco.core.scheduling.Scheduler;
+import com.willfp.eco.internal.UpdateChecker;
+import com.willfp.eco.internal.arrows.ArrowDataListener;
+import com.willfp.eco.internal.events.EcoEventManager;
+import com.willfp.eco.internal.extensions.EcoExtensionLoader;
+import com.willfp.eco.internal.factory.EcoMetadataValueFactory;
+import com.willfp.eco.internal.factory.EcoNamespacedKeyFactory;
+import com.willfp.eco.internal.factory.EcoRunnableFactory;
+import com.willfp.eco.internal.integrations.PlaceholderIntegrationPAPI;
+import com.willfp.eco.internal.logging.EcoLogger;
+import com.willfp.eco.internal.scheduling.EcoScheduler;
+import lombok.Getter;
+import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
+import org.bstats.bukkit.Metrics;
+import org.bukkit.Bukkit;
+import org.bukkit.event.Listener;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+
+public abstract class EcoPlugin extends JavaPlugin {
+    /**
+     * Loaded eco plugins.
+     */
+    public static final List<String> LOADED_ECO_PLUGINS = new ArrayList<>();
+
+    /**
+     * The name of the plugin.
+     */
+    @Getter
+    private final String pluginName;
+
+    /**
+     * The spigot resource ID of the plugin.
+     */
+    @Getter
+    private final int resourceId;
+
+    /**
+     * The bStats resource ID of the plugin.
+     */
+    @Getter
+    private final int bStatsId;
+
+    /**
+     * The package where proxy implementations are.
+     */
+    @Getter
+    private final String proxyPackage;
+
+    /**
+     * The color of the plugin, used in messages.
+     */
+    @Getter
+    private final String color;
+
+    /**
+     * Loaded integrations.
+     */
+    @Getter
+    private final Set<String> loadedIntegrations = new HashSet<>();
+
+    /**
+     * Set of classes to be processed on config update.
+     */
+    private final List<Class<?>> updatableClasses = new ArrayList<>();
+
+    /**
+     * The internal plugin scheduler.
+     */
+    @Getter
+    private final Scheduler scheduler;
+
+    /**
+     * The internal plugin Event Manager.
+     */
+    @Getter
+    private final EventManager eventManager;
+
+    /**
+     * Config.yml.
+     */
+    @Getter
+    private final ConfigYml configYml;
+
+    /**
+     * Lang.yml.
+     */
+    @Getter
+    private final LangYml langYml;
+
+    /**
+     * The internal factory to produce {@link org.bukkit.NamespacedKey}s.
+     */
+    @Getter
+    private final NamespacedKeyFactory namespacedKeyFactory;
+
+    /**
+     * The internal factory to produce {@link org.bukkit.metadata.FixedMetadataValue}s.
+     */
+    @Getter
+    private final MetadataValueFactory metadataValueFactory;
+
+    /**
+     * The internal factory to produce {@link com.willfp.eco.core.scheduling.RunnableTask}s.
+     */
+    @Getter
+    private final RunnableFactory runnableFactory;
+
+    /**
+     * The loader for all plugin extensions.
+     *
+     * @see com.willfp.eco.core.extensions.Extension
+     */
+    @Getter
+    private final ExtensionLoader extensionLoader;
+
+    /**
+     * The handler class for updatable classes.
+     */
+    @Getter
+    private final ConfigHandler configHandler;
+
+    /**
+     * The display module for the plugin.
+     */
+    @Getter
+    private DisplayModule displayModule;
+
+    /**
+     * The logger for the plugin.
+     */
+    private final Logger logger;
+
+    /**
+     * If the server is running an outdated version of the plugin.
+     */
+    @Getter
+    private boolean outdated = false;
+
+    /**
+     * Create a new plugin.
+     *
+     * @param pluginName   The name of the plugin.
+     * @param resourceId   The spigot resource ID for the plugin.
+     * @param bStatsId     The bStats resource ID for the plugin.
+     * @param proxyPackage The package where proxy implementations are stored.
+     * @param color        The color of the plugin (used in messages, such as &a, &b)
+     */
+    protected EcoPlugin(@NotNull final String pluginName,
+                        final int resourceId,
+                        final int bStatsId,
+                        @NotNull final String proxyPackage,
+                        @NotNull final String color) {
+        this.pluginName = pluginName;
+        this.resourceId = resourceId;
+        this.bStatsId = bStatsId;
+        this.proxyPackage = proxyPackage;
+        this.color = color;
+
+        this.scheduler = new EcoScheduler(this);
+        this.eventManager = new EcoEventManager(this);
+        this.namespacedKeyFactory = new EcoNamespacedKeyFactory(this);
+        this.metadataValueFactory = new EcoMetadataValueFactory(this);
+        this.runnableFactory = new EcoRunnableFactory(this);
+        this.extensionLoader = new EcoExtensionLoader(this);
+        this.configHandler = new ConfigHandler(this);
+        this.logger = new EcoLogger(this);
+
+        this.langYml = new LangYml(this);
+        this.configYml = new ConfigYml(this);
+
+        LOADED_ECO_PLUGINS.add(this.getName().toLowerCase());
+    }
+
+    /**
+     * Default code to be executed on plugin enable.
+     */
+    @Override
+    public final void onEnable() {
+        super.onEnable();
+
+        this.getLogger().info("");
+        this.getLogger().info("Loading " + this.color + this.pluginName);
+
+        this.getEventManager().registerListener(new ArrowDataListener(this));
+
+        new UpdateChecker(this).getVersion(version -> {
+            DefaultArtifactVersion currentVersion = new DefaultArtifactVersion(this.getDescription().getVersion());
+            DefaultArtifactVersion mostRecentVersion = new DefaultArtifactVersion(version);
+            if (!(currentVersion.compareTo(mostRecentVersion) > 0 || currentVersion.equals(mostRecentVersion))) {
+                this.outdated = true;
+                this.getScheduler().runTimer(() -> {
+                    this.getLogger().info("&c " + this.pluginName + " is out of date! (Version " + this.getDescription().getVersion() + ")");
+                    this.getLogger().info("&cThe newest version is &f" + version);
+                    this.getLogger().info("&cDownload the new version!");
+                }, 0, 864000);
+            }
+        });
+
+        new Metrics(this, this.bStatsId);
+
+        Set<String> enabledPlugins = Arrays.stream(Bukkit.getPluginManager().getPlugins()).map(Plugin::getName).collect(Collectors.toSet());
+
+        if (enabledPlugins.contains("PlaceholderAPI")) {
+            this.loadedIntegrations.add("PlaceholderAPI");
+            PlaceholderManager.addIntegration(new PlaceholderIntegrationPAPI(this));
+        }
+
+        this.getIntegrationLoaders().forEach((integrationLoader -> {
+            if (enabledPlugins.contains(integrationLoader.getPluginName())) {
+                this.loadedIntegrations.add(integrationLoader.getPluginName());
+                integrationLoader.load();
+            }
+        }));
+
+        this.getLogger().info("Loaded integrations: " + String.join(", ", this.getLoadedIntegrations()));
+
+        Prerequisite.update();
+
+        this.getPacketAdapters().forEach(abstractPacketAdapter -> {
+            if (!abstractPacketAdapter.isPostLoad()) {
+                abstractPacketAdapter.register();
+            }
+        });
+
+        updatableClasses.addAll(this.getUpdatableClasses());
+
+        this.getListeners().forEach(listener -> this.getEventManager().registerListener(listener));
+
+        this.getCommands().forEach(AbstractCommand::register);
+
+        this.getScheduler().runLater(this::afterLoad, 1);
+
+        this.updatableClasses.forEach(clazz -> this.getConfigHandler().registerUpdatableClass(clazz));
+
+        this.enable();
+
+        this.getLogger().info("");
+    }
+
+    /**
+     * Default code to be executed on plugin disable.
+     */
+    @Override
+    public final void onDisable() {
+        super.onDisable();
+
+        this.getEventManager().unregisterAllListeners();
+        this.getScheduler().cancelAll();
+
+        this.disable();
+    }
+
+    /**
+     * Default code to be executed on plugin load.
+     */
+    @Override
+    public final void onLoad() {
+        super.onLoad();
+
+        this.load();
+    }
+
+    /**
+     * Default code to be executed after the server is up.
+     */
+    public final void afterLoad() {
+        this.displayModule = createDisplayModule();
+
+        if (this.getDisplayModule() != null) {
+            Display.registerDisplayModule(this.getDisplayModule());
+        }
+
+        this.getPacketAdapters().forEach(abstractPacketAdapter -> {
+            if (abstractPacketAdapter.isPostLoad()) {
+                abstractPacketAdapter.register();
+            }
+        });
+
+        if (!Prerequisite.HAS_PAPER.isMet()) {
+            this.getLogger().severe("");
+            this.getLogger().severe("----------------------------");
+            this.getLogger().severe("");
+            this.getLogger().severe("You don't seem to be running paper!");
+            this.getLogger().severe("Paper is strongly recommended for all servers,");
+            this.getLogger().severe("and some things may not function properly without it");
+            this.getLogger().severe("Download Paper from &fhttps://papermc.io");
+            this.getLogger().severe("");
+            this.getLogger().severe("----------------------------");
+            this.getLogger().severe("");
+        }
+
+        this.postLoad();
+
+        this.reload();
+
+        this.getLogger().info("Loaded " + this.color + this.pluginName);
+    }
+
+    /**
+     * Default code to be executed on plugin reload.
+     */
+    public final void reload() {
+        this.getConfigYml().update();
+        this.getLangYml().update();
+
+        this.getConfigHandler().callUpdate();
+        this.getConfigHandler().callUpdate(); // Call twice to fix issues
+        this.getScheduler().cancelAll();
+
+        this.onReload();
+    }
+
+    /**
+     * The plugin-specific code to be executed on enable.
+     */
+    public abstract void enable();
+
+    /**
+     * The plugin-specific code to be executed on disable.
+     */
+    public abstract void disable();
+
+    /**
+     * The plugin-specific code to be executed on load.
+     */
+    public abstract void load();
+
+    /**
+     * The plugin-specific code to be executed on reload.
+     */
+    public abstract void onReload();
+
+    /**
+     * The plugin-specific code to be executed after the server is up.
+     */
+    public abstract void postLoad();
+
+    /**
+     * The plugin-specific integrations to be tested and loaded.
+     *
+     * @return A list of integrations.
+     */
+    public abstract List<IntegrationLoader> getIntegrationLoaders();
+
+    /**
+     * The command to be registered.
+     *
+     * @return A list of commands.
+     */
+    public abstract List<AbstractCommand> getCommands();
+
+    /**
+     * ProtocolLib packet adapters to be registered.
+     * <p>
+     * If the plugin does not require ProtocolLib this can be left empty.
+     *
+     * @return A list of packet adapters.
+     */
+    public abstract List<AbstractPacketAdapter> getPacketAdapters();
+
+    /**
+     * All listeners to be registered.
+     *
+     * @return A list of all listeners.
+     */
+    public abstract List<Listener> getListeners();
+
+    /**
+     * All updatable classes.
+     *
+     * @return A list of all updatable classes.
+     */
+    public abstract List<Class<?>> getUpdatableClasses();
+
+    /**
+     * Create the display module for the plugin.
+     *
+     * @return The display module, or null.
+     */
+    @Nullable
+    protected DisplayModule createDisplayModule() {
+        return null;
+    }
+
+    @NotNull
+    @Override
+    public Logger getLogger() {
+        return logger;
+    }
+}

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

@@ -0,0 +1,22 @@
+package com.willfp.eco.core;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class PluginDependent {
+    /**
+     * The {@link EcoPlugin} that is stored.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final EcoPlugin plugin;
+
+    /**
+     * Pass an {@link EcoPlugin} in order to interface with it.
+     *
+     * @param plugin The plugin to manage.
+     */
+    protected PluginDependent(@NotNull final EcoPlugin plugin) {
+        this.plugin = plugin;
+    }
+}

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

@@ -1,8 +1,7 @@
-package com.willfp.eco.util.optional;
+package com.willfp.eco.core;
 
 import com.willfp.eco.util.ClassUtils;
 import lombok.Getter;
-import org.bukkit.Bukkit;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
@@ -15,15 +14,6 @@ public class Prerequisite {
      * All existing prerequisites are registered on creation.
      */
     private static final List<Prerequisite> VALUES = new ArrayList<>();
-
-    /**
-     * Requires the server to be running minecraft version 1.16 or higher.
-     */
-    public static final Prerequisite MINIMUM_1_16 = new Prerequisite(
-            () -> !Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3].contains("15"),
-            "Requires minimum server version of 1.16"
-    );
-
     /**
      * Requires the server to be running an implementation of paper.
      */

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

@@ -1,9 +1,7 @@
-package com.willfp.eco.util.command;
+package com.willfp.eco.core.command;
 
-import com.willfp.eco.util.config.Configs;
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.interfaces.Registerable;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.Bukkit;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
@@ -16,7 +14,7 @@ import org.jetbrains.annotations.Nullable;
 import java.util.Arrays;
 import java.util.List;
 
-public abstract class AbstractCommand extends PluginDependent implements CommandExecutor, Registerable {
+public abstract class AbstractCommand extends PluginDependent implements CommandExecutor {
     /**
      * The name of the command
      * <p>
@@ -45,12 +43,12 @@ public abstract class AbstractCommand extends PluginDependent implements Command
      * <p>
      * The name cannot be the same as an existing command as this will conflict.
      *
-     * @param plugin      The owning {@link AbstractEcoPlugin}.
+     * @param plugin      The owning {@link EcoPlugin}.
      * @param name        The name used in execution.
      * @param permission  The permission required to execute the command.
      * @param playersOnly If only players should be able to execute this command.
      */
-    protected AbstractCommand(@NotNull final AbstractEcoPlugin plugin,
+    protected AbstractCommand(@NotNull final EcoPlugin plugin,
                               @NotNull final String name,
                               @NotNull final String permission,
                               final boolean playersOnly) {
@@ -100,7 +98,7 @@ public abstract class AbstractCommand extends PluginDependent implements Command
      * @param command The bukkit command.
      * @param label   The name of the executed command.
      * @param args    The arguments of the command (anything after the physical command name)
-     * @return If the command was processed by the linked {@link AbstractEcoPlugin}
+     * @return If the command was processed by the linked {@link EcoPlugin}
      */
     @Override
     public final boolean onCommand(@NotNull final CommandSender sender,
@@ -112,12 +110,12 @@ public abstract class AbstractCommand extends PluginDependent implements Command
         }
 
         if (playersOnly && !(sender instanceof Player)) {
-            sender.sendMessage(Configs.LANG.getMessage("not-player"));
+            sender.sendMessage(this.getPlugin().getLangYml().getMessage("not-player"));
             return true;
         }
 
         if (!sender.hasPermission(permission) && sender instanceof Player) {
-            sender.sendMessage(Configs.LANG.getNoPermission());
+            sender.sendMessage(this.getPlugin().getLangYml().getNoPermission());
             return true;
         }
 
@@ -131,7 +129,6 @@ public abstract class AbstractCommand extends PluginDependent implements Command
      * <p>
      * Requires the command name to exist, defined in plugin.yml.
      */
-    @Override
     public final void register() {
         PluginCommand command = Bukkit.getPluginCommand(name);
         assert command != null;

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.command;
+package com.willfp.eco.core.command;
 
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;

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

@@ -0,0 +1,40 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.UpdatableYamlConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class BaseConfig extends UpdatableYamlConfig {
+
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Automatically updates.
+     *
+     * @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 BaseConfig(@NotNull final String configName,
+                         final boolean removeUnused,
+                         @NotNull final EcoPlugin plugin,
+                         @NotNull final String... updateBlacklist) {
+        super(configName, plugin, "", plugin.getClass(), removeUnused, updateBlacklist);
+    }
+
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Automatically updates.
+     *
+     * @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 BaseConfig(@NotNull final String configName,
+                         final boolean removeUnused,
+                         @NotNull final EcoPlugin plugin) {
+        super(configName, plugin, "", plugin.getClass(), removeUnused, "");
+    }
+}

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

@@ -0,0 +1,219 @@
+package com.willfp.eco.core.config;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+public interface Config {
+    /**
+     * Clears cache.
+     */
+    void clearCache();
+
+    /**
+     * Get if the config contains a key.
+     *
+     * @param path The key to check.
+     * @return If contained.
+     */
+    boolean has(@NotNull String path);
+
+    /**
+     * Get config keys.
+     *
+     * @param deep If keys from subsections should be fetched too.
+     * @return A list of keys.
+     */
+    @NotNull
+    List<String> getKeys(boolean deep);
+
+    /**
+     * Get an object from config.
+     * Default implementations call {@link org.bukkit.configuration.file.YamlConfiguration#get(String)}.
+     *
+     * @param path The path.
+     * @return The object.
+     */
+    @Nullable
+    Object get(@NotNull String path);
+
+    /**
+     * Set an object in config.
+     * Default implementations call {@link org.bukkit.configuration.file.YamlConfiguration#set(String, Object)}
+     *
+     * @param path The path.
+     * @param object The object.
+     */
+    void set(@NotNull String path,
+             @Nullable Object object);
+
+    /**
+     * Get subsection from config.
+     *
+     * @param path The key to check.
+     * @return The subsection. Throws NPE if not found.
+     */
+    @NotNull
+    Config getSubsection(@NotNull String path);
+
+    /**
+     * Get subsection from config.
+     *
+     * @param path The key to check.
+     * @return The subsection, or null if not found.
+     */
+    @Nullable
+    Config getSubsectionOrNull(@NotNull String path);
+
+    /**
+     * Get an integer from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or 0 if not found.
+     */
+    int getInt(@NotNull String path);
+
+    /**
+     * Get an integer from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    Integer getIntOrNull(@NotNull String path);
+
+    /**
+     * Get an integer from config with a specified default (not found) value.
+     *
+     * @param path The key to fetch the value from.
+     * @param def  The value to default to if not found.
+     * @return The found value, or the default.
+     */
+    int getInt(@NotNull String path,
+               int def);
+
+    /**
+     * Get a list of integers 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
+    List<Integer> getInts(@NotNull String path);
+
+    /**
+     * Get a list of integers from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<Integer> getIntsOrNull(@NotNull String path);
+
+    /**
+     * Get a boolean from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or false if not found.
+     */
+    boolean getBool(@NotNull String path);
+
+    /**
+     * Get a boolean from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    Boolean getBoolOrNull(@NotNull String path);
+
+    /**
+     * Get a list of booleans 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
+    List<Boolean> getBools(@NotNull String path);
+
+    /**
+     * Get a list of booleans from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<Boolean> getBoolsOrNull(@NotNull String path);
+
+    /**
+     * Get a string from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or an empty string if not found.
+     */
+    @NotNull
+    String getString(@NotNull String path);
+
+    /**
+     * Get a string from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    String getStringOrNull(@NotNull String path);
+
+    /**
+     * Get a list of strings 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
+    List<String> getStrings(@NotNull String path);
+
+    /**
+     * Get a list of strings from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<String> getStringsOrNull(@NotNull String path);
+
+    /**
+     * Get a decimal from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or 0 if not found.
+     */
+    double getDouble(@NotNull String path);
+
+    /**
+     * Get a decimal from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    Double getDoubleOrNull(@NotNull String path);
+
+    /**
+     * Get a list of decimals 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
+    List<Double> getDoubles(@NotNull String path);
+
+    /**
+     * Get a list of decimals from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<Double> getDoublesOrNull(@NotNull String path);
+}

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.config.updating.annotations;
+package com.willfp.eco.core.config;
 
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;

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

@@ -0,0 +1,28 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.UpdatableYamlConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class ExtendableConfig extends UpdatableYamlConfig {
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.yml, lang.yml).
+     * <p>
+     * Automatically updates.
+     *
+     * @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 ExtendableConfig(@NotNull final String configName,
+                               final boolean removeUnused,
+                               @NotNull final EcoPlugin plugin,
+                               @NotNull final Class<?> source,
+                               @NotNull final String subDirectoryPath,
+                               @NotNull final String... updateBlacklist) {
+        super(configName, plugin, subDirectoryPath, source, removeUnused, updateBlacklist);
+    }
+}

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

@@ -0,0 +1,20 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.LoadableYamlConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class StaticBaseConfig extends LoadableYamlConfig {
+    /**
+     * 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 StaticBaseConfig(@NotNull final String configName,
+                               @NotNull final EcoPlugin plugin) {
+        super(configName, plugin, "", plugin.getClass());
+    }
+}

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

@@ -0,0 +1,18 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.internal.config.ConfigWrapper;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class YamlConfig extends ConfigWrapper<YamlConfiguration> {
+    /**
+     * Config implementation for passing YamlConfigurations.
+     * <p>
+     * Does not automatically update.
+     *
+     * @param config     The YamlConfiguration handle.
+     */
+    public YamlConfig(@NotNull final YamlConfiguration config) {
+        init(config);
+    }
+}

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

@@ -0,0 +1,17 @@
+package com.willfp.eco.core.config.base;
+
+import com.willfp.eco.core.config.BaseConfig;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+
+public class ConfigYml extends BaseConfig {
+    /**
+     * Config.yml.
+     *
+     * @param plugin The plugin.
+     */
+    public ConfigYml(@NotNull final EcoPlugin plugin) {
+        super("config", true, plugin);
+    }
+}

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

@@ -1,15 +1,17 @@
-package com.willfp.eco.util.config.configs;
+package com.willfp.eco.core.config.base;
 
-import com.willfp.eco.util.StringUtils;
-import com.willfp.eco.util.config.BaseConfig;
+import com.willfp.eco.core.config.BaseConfig;
+import com.willfp.eco.core.EcoPlugin;
 import org.jetbrains.annotations.NotNull;
 
-public class Lang extends BaseConfig {
+public class LangYml extends BaseConfig {
     /**
-     * lang.yml.
+     * Lang.yml.
+     *
+     * @param plugin The plugin.
      */
-    public Lang() {
-        super("lang", false);
+    public LangYml(@NotNull final EcoPlugin plugin) {
+        super("lang", false, plugin);
     }
 
     /**
@@ -18,7 +20,7 @@ public class Lang extends BaseConfig {
      * @return The prefix.
      */
     public String getPrefix() {
-        return StringUtils.translate(this.getConfig().getString("messages.prefix"));
+        return this.getString("messages.prefix");
     }
 
     /**
@@ -27,7 +29,7 @@ public class Lang extends BaseConfig {
      * @return The message.
      */
     public String getNoPermission() {
-        return getPrefix() + StringUtils.translate(this.getConfig().getString("messages.no-permission"));
+        return getPrefix() + this.getString("messages.no-permission");
     }
 
     /**
@@ -37,6 +39,6 @@ public class Lang extends BaseConfig {
      * @return The message with a prefix appended.
      */
     public String getMessage(@NotNull final String message) {
-        return getPrefix() + StringUtils.translate(this.getConfig().getString("messages." + message));
+        return getPrefix() + this.getString("messages." + message);
     }
 }

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

@@ -0,0 +1,216 @@
+package com.willfp.eco.core.display;
+
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang.Validate;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.persistence.PersistentDataContainer;
+import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+@UtilityClass
+public class Display {
+    /**
+     * The prefix for lore lines.
+     */
+    public static final String PREFIX = "§z";
+
+    /**
+     * All registered display modules.
+     */
+    private static final Map<DisplayPriority, List<DisplayModule>> MODULES = new HashMap<>();
+
+    /**
+     * NamespacedKey for finalizing.
+     */
+    private static NamespacedKey finalizeKey = null;
+
+    /**
+     * Register display module.
+     *
+     * @param module The module.
+     */
+    public void registerDisplayModule(@NotNull final DisplayModule module) {
+        List<DisplayModule> modules = MODULES.get(module.getPriority());
+
+        modules.removeIf(module1 -> module1.getPluginName().equalsIgnoreCase(module.getPluginName()));
+
+        modules.add(module);
+
+        MODULES.put(module.getPriority(), modules);
+    }
+
+    /**
+     * Display on ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack display(@NotNull final ItemStack itemStack) {
+        if (!itemStack.hasItemMeta()) {
+            return itemStack; // return early if there's no customization of the item
+        }
+
+        Map<String, Object[]> pluginVarArgs = new HashMap<>();
+
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            List<DisplayModule> modules = MODULES.get(priority);
+            for (DisplayModule module : modules) {
+                pluginVarArgs.put(module.getPluginName(), module.generateVarArgs(itemStack));
+            }
+        }
+
+        revert(itemStack);
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return itemStack;
+        }
+
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            List<DisplayModule> modules = MODULES.get(priority);
+            for (DisplayModule module : modules) {
+                Object[] varargs = pluginVarArgs.get(module.getPluginName());
+                module.display(itemStack, varargs);
+            }
+        }
+
+        return itemStack;
+    }
+
+    /**
+     * Display on ItemStacks and then finalize.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack displayAndFinalize(@NotNull final ItemStack itemStack) {
+        return finalize(display(itemStack));
+    }
+
+    /**
+     * Revert on ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack revert(@NotNull final ItemStack itemStack) {
+        if (Display.isFinalized(itemStack)) {
+            unfinalize(itemStack);
+        }
+
+        if (!itemStack.hasItemMeta()) {
+            return itemStack;
+        }
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return itemStack;
+        }
+
+        List<String> lore = meta.getLore();
+
+        if (lore != null && lore.removeIf(line -> line.startsWith(Display.PREFIX))) { // only apply lore modification if needed
+            meta.setLore(lore);
+            itemStack.setItemMeta(meta);
+        }
+
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            List<DisplayModule> modules = MODULES.get(priority);
+            for (DisplayModule module : modules) {
+                module.revert(itemStack);
+            }
+        }
+
+        return itemStack;
+    }
+
+    /**
+     * Finalize an ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack finalize(@NotNull final ItemStack itemStack) {
+        Validate.notNull(finalizeKey, "Key cannot be null!");
+
+        if (itemStack.getType().getMaxStackSize() > 1) {
+            return itemStack;
+        }
+
+        ItemMeta meta = itemStack.getItemMeta();
+        if (meta == null) {
+            return itemStack;
+        }
+
+        PersistentDataContainer container = meta.getPersistentDataContainer();
+        container.set(finalizeKey, PersistentDataType.INTEGER, 1);
+        itemStack.setItemMeta(meta);
+        return itemStack;
+    }
+
+    /**
+     * Unfinalize an ItemStacks.
+     *
+     * @param itemStack The item.
+     * @return The itemstack.
+     */
+    public ItemStack unfinalize(@NotNull final ItemStack itemStack) {
+        Validate.notNull(finalizeKey, "Key cannot be null!");
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return itemStack;
+        }
+
+        PersistentDataContainer container = meta.getPersistentDataContainer();
+        container.remove(finalizeKey);
+        itemStack.setItemMeta(meta);
+        return itemStack;
+    }
+
+    /**
+     * If an item is finalized.
+     *
+     * @param itemStack The item.
+     * @return If finalized.
+     */
+    public boolean isFinalized(@NotNull final ItemStack itemStack) {
+        Validate.notNull(finalizeKey, "Key cannot be null!");
+
+        ItemMeta meta = itemStack.getItemMeta();
+
+        if (meta == null) {
+            return false;
+        }
+
+        PersistentDataContainer container = meta.getPersistentDataContainer();
+        return container.has(finalizeKey, PersistentDataType.INTEGER);
+    }
+
+    /**
+     * Set key to be used for finalization.
+     *
+     * @param finalizeKey The key.
+     */
+    @ApiStatus.Internal
+    public static void setFinalizeKey(@NotNull final NamespacedKey finalizeKey) {
+        Display.finalizeKey = finalizeKey;
+    }
+
+    static {
+        for (DisplayPriority priority : DisplayPriority.values()) {
+            MODULES.put(priority, new ArrayList<>());
+        }
+    }
+}

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

@@ -0,0 +1,66 @@
+package com.willfp.eco.core.display;
+
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
+import lombok.Getter;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class DisplayModule extends PluginDependent {
+    /**
+     * The priority of the module.
+     */
+    @Getter
+    private final DisplayPriority priority;
+
+    /**
+     * Create a new display module.
+     *
+     * @param plugin   The plugin that the display is for.
+     * @param priority The priority of the module.
+     */
+    protected DisplayModule(@NotNull final EcoPlugin plugin,
+                            @NotNull final DisplayPriority priority) {
+        super(plugin);
+        this.priority = priority;
+    }
+
+    /**
+     * Display an item.
+     *
+     * @param itemStack The item.
+     * @param args      Optional args for display.
+     */
+    protected void display(@NotNull final ItemStack itemStack,
+                           @NotNull final Object... args) {
+        // Technically optional.
+    }
+
+    /**
+     * Revert an item.
+     *
+     * @param itemStack The item.
+     */
+    protected void revert(@NotNull final ItemStack itemStack) {
+        // Technically optional.
+    }
+
+    /**
+     * Create varargs to pass back to itemstack after reverting, but before display.
+     *
+     * @param itemStack The itemStack.
+     * @return The plugin-specific varargs.
+     */
+    protected Object[] generateVarArgs(@NotNull final ItemStack itemStack) {
+        return new Object[0];
+    }
+
+    /**
+     * Get name of plugin.
+     *
+     * @return The plugin name.
+     */
+    final String getPluginName() {
+        return super.getPlugin().getPluginName();
+    }
+}

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

@@ -0,0 +1,23 @@
+package com.willfp.eco.core.display;
+
+public enum DisplayPriority {
+    /**
+     * Ran first.
+     */
+    LOWEST,
+
+    /**
+     * Ran second.
+     */
+    LOW,
+
+    /**
+     * Ran third.
+     */
+    HIGH,
+
+    /**
+     * Ran last.
+     */
+    HIGHEST
+}

eco-api/src/main/java/com/willfp/eco/core/drops/DropQueue.java

@@ -1,10 +1,10 @@
-package com.willfp.eco.util.drops;
+package com.willfp.eco.core.drops;
 
-import com.willfp.eco.util.drops.internal.AbstractDropQueue;
-import com.willfp.eco.util.drops.internal.DropManager;
-import com.willfp.eco.util.drops.internal.DropQueueType;
-import com.willfp.eco.util.drops.internal.FastCollatedDropQueue;
-import com.willfp.eco.util.drops.internal.InternalDropQueue;
+import com.willfp.eco.internal.drops.AbstractDropQueue;
+import com.willfp.eco.internal.drops.DropManager;
+import com.willfp.eco.internal.drops.DropQueueType;
+import com.willfp.eco.internal.drops.impl.FastCollatedDropQueue;
+import com.willfp.eco.internal.drops.impl.InternalDropQueue;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;

eco-api/src/main/java/com/willfp/eco/core/events/ArmorEquipEvent.java

@@ -0,0 +1,31 @@
+package com.willfp.eco.core.events;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+
+public class ArmorEquipEvent extends PlayerEvent {
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    public ArmorEquipEvent(@NotNull final Player player) {
+        super(player);
+    }
+
+    /**
+     * Gets a list of handlers handling this event.
+     *
+     * @return A list of handlers handling this event.
+     */
+
+    @Override
+    @NotNull
+    public HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/events/EntityDeathByEntityEvent.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.events.entitydeathbyentity;
+package com.willfp.eco.core.events;
 
 import lombok.Getter;
 import org.bukkit.entity.Entity;

eco-api/src/main/java/com/willfp/eco/core/events/EventManager.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.bukkit.events;
+package com.willfp.eco.core.events;
 
 import org.bukkit.event.Listener;
 

eco-api/src/main/java/com/willfp/eco/core/events/NaturalExpGainEvent.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.events.naturalexpgainevent;
+package com.willfp.eco.core.events;
 
 import lombok.Getter;
 import org.bukkit.event.Event;

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

@@ -1,18 +1,27 @@
-package com.willfp.eco.util.extensions;
+package com.willfp.eco.core.extensions;
 
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.internal.extensions.ExtensionMetadata;
+import com.willfp.eco.core.EcoPlugin;
 import lombok.AccessLevel;
 import lombok.Getter;
 import org.apache.commons.lang.Validate;
-import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
 public abstract class Extension {
     /**
-     * The {@link AbstractEcoPlugin} that this extension is for.
+     * The {@link EcoPlugin} that this extension is for.
      */
     @Getter(AccessLevel.PROTECTED)
-    private final AbstractEcoPlugin plugin = AbstractEcoPlugin.getInstance();
+    private final EcoPlugin plugin;
+
+    /**
+     * Create a new extension for a plugin.
+     *
+     * @param plugin The plugin.
+     */
+    protected Extension(@NotNull final EcoPlugin plugin) {
+        this.plugin = plugin;
+    }
 
     /**
      * Metadata containing version and name.
@@ -62,7 +71,7 @@ public abstract class Extension {
      */
     public final String getName() {
         Validate.notNull(metadata, "Metadata cannot be null!");
-        return this.metadata.name;
+        return this.metadata.getName();
     }
 
     /**
@@ -72,36 +81,6 @@ public abstract class Extension {
      */
     public final String getVersion() {
         Validate.notNull(metadata, "Metadata cannot be null!");
-        return this.metadata.version;
-    }
-
-    /**
-     * Wrapper for the string and version of the extension.
-     * Contains versions and name.
-     * Designed for internal use.
-     */
-    @ApiStatus.Internal
-    public static final class ExtensionMetadata {
-        /**
-         * The version of the extension.
-         */
-        private final @NotNull String version;
-
-        /**
-         * The extension's name.
-         */
-        private final @NotNull String name;
-
-        /**
-         * Create a new extension metadata.
-         *
-         * @param version The version for the extension to be.
-         * @param name    The name of the extension.
-         */
-        public ExtensionMetadata(@NotNull final String version,
-                                 @NotNull final String name) {
-            this.version = version;
-            this.name = name;
-        }
+        return this.metadata.getVersion();
     }
 }

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

@@ -1,6 +1,4 @@
-package com.willfp.eco.util.extensions.loader;
-
-import com.willfp.eco.util.extensions.Extension;
+package com.willfp.eco.core.extensions;
 
 import java.util.Set;
 
@@ -20,11 +18,6 @@ public interface ExtensionLoader {
      */
     void unloadExtensions();
 
-    /**
-     * Reload all extensions.
-     */
-    void reloadExtensions();
-
     /**
      * Retrieve a set of all loaded extensions.
      *

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.extensions;
+package com.willfp.eco.core.extensions;
 
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/core/factory/MetadataValueFactory.java

@@ -0,0 +1,8 @@
+package com.willfp.eco.core.factory;
+
+import org.bukkit.metadata.FixedMetadataValue;
+import org.jetbrains.annotations.NotNull;
+
+public interface MetadataValueFactory {
+    FixedMetadataValue create(@NotNull Object value);
+}

eco-api/src/main/java/com/willfp/eco/core/factory/NamespacedKeyFactory.java

@@ -0,0 +1,14 @@
+package com.willfp.eco.core.factory;
+
+import org.bukkit.NamespacedKey;
+import org.jetbrains.annotations.NotNull;
+
+public interface NamespacedKeyFactory {
+    /**
+     * Create an {@link NamespacedKey} associated with an {@link com.willfp.eco.core.EcoPlugin}.
+     *
+     * @param key The key in the {@link NamespacedKey}.
+     * @return The created {@link NamespacedKey}.
+     */
+    NamespacedKey create(@NotNull String key);
+}

eco-api/src/main/java/com/willfp/eco/core/factory/RunnableFactory.java

@@ -0,0 +1,16 @@
+package com.willfp.eco.core.factory;
+
+import com.willfp.eco.core.scheduling.RunnableTask;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+public interface RunnableFactory {
+    /**
+     * Create a {@link RunnableTask}.
+     *
+     * @param consumer Lambda of the code to run, where the parameter represents the instance of the runnable.
+     * @return The created {@link RunnableTask}.
+     */
+    RunnableTask create(@NotNull Consumer<RunnableTask> consumer);
+}

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations;
+package com.willfp.eco.core.integrations;
 
 public interface Integration {
     /**

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations;
+package com.willfp.eco.core.integrations;
 
 import lombok.Getter;
 import org.jetbrains.annotations.NotNull;

eco-api/src/main/java/com/willfp/eco/core/integrations/anticheat/AnticheatManager.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.anticheat;
+package com.willfp.eco.core.integrations.anticheat;
 
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
 import lombok.experimental.UtilityClass;
 import org.bukkit.entity.Player;
 import org.bukkit.event.Listener;
@@ -11,11 +11,6 @@ import java.util.Set;
 
 @UtilityClass
 public class AnticheatManager {
-    /**
-     * The linked {@link AbstractEcoPlugin} to register anticheat listeners to.
-     */
-    private final AbstractEcoPlugin plugin = AbstractEcoPlugin.getInstance();
-
     /**
      * A set of all registered anticheats.
      */
@@ -24,9 +19,11 @@ public class AnticheatManager {
     /**
      * Register a new anticheat.
      *
+     * @param plugin    The plugin.
      * @param anticheat The anticheat to register.
      */
-    public void register(@NotNull final AnticheatWrapper anticheat) {
+    public void register(@NotNull final EcoPlugin plugin,
+                         @NotNull final AnticheatWrapper anticheat) {
         if (anticheat instanceof Listener) {
             plugin.getEventManager().registerListener((Listener) anticheat);
         }
@@ -49,8 +46,6 @@ public class AnticheatManager {
      * @param player The player to remove the exemption.
      */
     public void unexemptPlayer(@NotNull final Player player) {
-        plugin.getScheduler().runLater(() -> {
-            anticheats.forEach(anticheat -> anticheat.unexempt(player));
-        }, 1);
+        anticheats.forEach(anticheat -> anticheat.unexempt(player));
     }
 }

eco-api/src/main/java/com/willfp/eco/core/integrations/anticheat/AnticheatWrapper.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.anticheat;
+package com.willfp.eco.core.integrations.anticheat;
 
-import com.willfp.eco.util.integrations.Integration;
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations.antigrief;
+package com.willfp.eco.core.integrations.antigrief;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.Location;

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

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.antigrief;
+package com.willfp.eco.core.integrations.antigrief;
 
-import com.willfp.eco.util.integrations.Integration;
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.Location;
 import org.bukkit.block.Block;
 import org.bukkit.entity.LivingEntity;

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

@@ -0,0 +1,52 @@
+package com.willfp.eco.core.integrations.mcmmo;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.block.Block;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@UtilityClass
+public class McmmoManager {
+    /**
+     * A set of all registered integrations.
+     */
+    private final Set<McmmoWrapper> regsistered = new HashSet<>();
+
+    /**
+     * Register a new integration.
+     *
+     * @param integration The integration to register.
+     */
+    public void register(@NotNull final McmmoWrapper integration) {
+        regsistered.add(integration);
+    }
+
+    /**
+     * Get bonus drop count from block.
+     *
+     * @param block The block.
+     * @return The bonus drop count.
+     */
+    public int getBonusDropCount(@NotNull final Block block) {
+        for (McmmoWrapper mcmmoWrapper : regsistered) {
+            return mcmmoWrapper.getBonusDropCount(block);
+        }
+        return 0;
+    }
+
+    /**
+     * Get if event is fake.
+     *
+     * @param event The event to check.
+     * @return If the event is fake.
+     */
+    public boolean isFake(@NotNull final Event event) {
+        for (McmmoWrapper mcmmoWrapper : regsistered) {
+            return mcmmoWrapper.isFake(event);
+        }
+        return false;
+    }
+}

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

@@ -0,0 +1,23 @@
+package com.willfp.eco.core.integrations.mcmmo;
+
+import org.bukkit.block.Block;
+import org.bukkit.event.Event;
+import org.jetbrains.annotations.NotNull;
+
+public interface McmmoWrapper {
+    /**
+     * Get bonus drop count of block.
+     *
+     * @param block The block.
+     * @return The drop multiplier.
+     */
+    int getBonusDropCount(@NotNull Block block);
+
+    /**
+     * Get if event is fake.
+     *
+     * @param event The event.
+     * @return If is fake.
+     */
+    boolean isFake(@NotNull Event event);
+}

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations.placeholder;
+package com.willfp.eco.core.integrations.placeholder;
 
 import lombok.Getter;
 import org.apache.commons.lang.Validate;

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

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.integrations.placeholder;
+package com.willfp.eco.core.integrations.placeholder;
 
-import com.willfp.eco.util.integrations.Integration;
+import com.willfp.eco.core.integrations.Integration;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.integrations.placeholder;
+package com.willfp.eco.core.integrations.placeholder;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.entity.Player;

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

@@ -0,0 +1,59 @@
+package com.willfp.eco.core.items;
+
+import lombok.Getter;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.function.Predicate;
+
+public class CustomItem implements TestableItem {
+    /**
+     * The key.
+     */
+    @Getter
+    private final NamespacedKey key;
+
+    /**
+     * The test for ItemStacks to pass.
+     */
+    private final Predicate<ItemStack> test;
+
+    /**
+     * Example Item: what the user should see.
+     */
+    private final ItemStack item;
+
+    /**
+     * Create a new complex recipe part.
+     *
+     * @param key  The item key.
+     * @param test The test.
+     * @param item The example ItemStacks.
+     */
+    public CustomItem(@NotNull final NamespacedKey key,
+                      @NotNull final Predicate<ItemStack> test,
+                      @NotNull final ItemStack item) {
+        this.key = key;
+        this.test = test;
+        this.item = item;
+    }
+
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return test.test(itemStack);
+    }
+
+    @Override
+    public ItemStack getItem() {
+        return item;
+    }
+
+    /**
+     * Register the item.
+     */
+    public void register() {
+        Items.registerCustomItem(this.getKey(), this);
+    }
+}

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

@@ -0,0 +1,69 @@
+package com.willfp.eco.core.items;
+
+import com.willfp.eco.core.recipe.parts.EmptyTestableItem;
+import com.willfp.eco.core.recipe.parts.MaterialTestableItem;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@UtilityClass
+@SuppressWarnings("deprecation")
+public final class Items {
+    /**
+     * All recipe parts.
+     */
+    private static final Map<NamespacedKey, CustomItem> REGISTRY = new HashMap<>();
+
+    /**
+     * Register a new recipe part.
+     *
+     * @param key  The key of the recipe part.
+     * @param part The recipe part.
+     */
+    public void registerCustomItem(@NotNull final NamespacedKey key,
+                                   @NotNull final CustomItem part) {
+        REGISTRY.put(key, part);
+    }
+
+    /**
+     * Lookup item from string.
+     * <p>
+     * Used for recipes.
+     *
+     * @param key The string to test.
+     * @return The found testable item, or an empty item if not found.
+     */
+    public TestableItem lookup(@NotNull final String key) {
+        String[] split = key.toLowerCase().split(":");
+        if (split.length == 1) {
+            Material material = Material.getMaterial(key.toUpperCase());
+            if (material == null || material == Material.AIR) {
+                return new EmptyTestableItem();
+            }
+            return new MaterialTestableItem(material);
+        }
+
+        CustomItem part = REGISTRY.get(new NamespacedKey(split[0], split[1]));
+        return part == null ? new EmptyTestableItem() : part;
+    }
+
+    /**
+     * Get if itemStack is a custom item.
+     *
+     * @param itemStack The itemStack to check.
+     * @return If is recipe.
+     */
+    public boolean isCustomItem(@NotNull final ItemStack itemStack) {
+        for (CustomItem item : REGISTRY.values()) {
+            if (item.matches(itemStack)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

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

@@ -0,0 +1,21 @@
+package com.willfp.eco.core.items;
+
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public interface TestableItem {
+    /**
+     * If an ItemStack matches the recipe part.
+     *
+     * @param itemStack The item to test.
+     * @return If the item matches.
+     */
+    boolean matches(@Nullable ItemStack itemStack);
+
+    /**
+     * Get an example item.
+     *
+     * @return The item.
+     */
+    ItemStack getItem();
+}

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.proxy;
+package com.willfp.eco.core.proxy;
 
 public interface AbstractProxy {
 

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.proxy;
+package com.willfp.eco.core.proxy;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.Bukkit;

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

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.proxy;
+package com.willfp.eco.core.proxy;
 
 import org.jetbrains.annotations.NotNull;
 

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

@@ -0,0 +1,62 @@
+package com.willfp.eco.core.recipe;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import com.willfp.eco.core.recipe.recipes.CraftingRecipe;
+import lombok.experimental.UtilityClass;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@UtilityClass
+@SuppressWarnings("deprecation")
+public class Recipes {
+    /**
+     * Registry of all recipes.
+     */
+    private static final BiMap<NamespacedKey, CraftingRecipe> RECIPES = HashBiMap.create();
+
+
+    /**
+     * Register a recipe.
+     *
+     * @param recipe The recipe.
+     */
+    public void register(@NotNull final CraftingRecipe recipe) {
+        RECIPES.forcePut(recipe.getKey(), recipe);
+    }
+
+    /**
+     * Get recipe matching matrix.
+     *
+     * @param matrix The matrix to test.
+     * @return The match, or null if not found.
+     */
+    @Nullable
+    public CraftingRecipe getMatch(@NotNull final ItemStack[] matrix) {
+        return RECIPES.values().stream().filter(recipe -> recipe.test(matrix)).findFirst().orElse(null);
+    }
+
+    /**
+     * Get recipe by key.
+     *
+     * @param key The key.
+     * @return The recipe, or null if not found.
+     */
+    @Nullable
+    public CraftingRecipe getRecipe(@NotNull final NamespacedKey key) {
+        CraftingRecipe recipe = RECIPES.get(key);
+        if (recipe != null) {
+            return recipe;
+        }
+
+        if (key.getKey().contains("_displayed")) {
+            NamespacedKey otherKey = new NamespacedKey(key.getNamespace(), key.getKey().replace("_displayed", ""));
+
+            return RECIPES.get(otherKey);
+        }
+
+        return null;
+    }
+}

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

@@ -0,0 +1,31 @@
+package com.willfp.eco.core.recipe.parts;
+
+import com.willfp.eco.core.items.TestableItem;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.Nullable;
+
+public class EmptyTestableItem implements TestableItem {
+    /**
+     * Create a new empty recipe part.
+     */
+    public EmptyTestableItem() {
+
+    }
+
+    /**
+     * If the item is empty.
+     *
+     * @param itemStack The item to test.
+     * @return If the item is empty.
+     */
+    @Override
+    public boolean matches(@Nullable final ItemStack itemStack) {
+        return itemStack == null || itemStack.getType() == Material.AIR;
+    }
+
+    @Override
+    public ItemStack getItem() {
+        return new ItemStack(Material.AIR);
+    }
+}

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

@@ -0,0 +1,41 @@
+package com.willfp.eco.core.recipe.parts;
+
+import com.willfp.eco.core.items.TestableItem;
+import lombok.Getter;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class MaterialTestableItem implements TestableItem {
+    /**
+     * The material.
+     */
+    @Getter
+    private final Material material;
+
+    /**
+     * Create a new simple recipe part.
+     *
+     * @param material The material.
+     */
+    public MaterialTestableItem(@NotNull final Material material) {
+        this.material = 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() == material;
+    }
+
+    @Override
+    public ItemStack getItem() {
+        return new ItemStack(material);
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/recipes/CraftingRecipe.java

@@ -0,0 +1,51 @@
+package com.willfp.eco.core.recipe.recipes;
+
+import com.willfp.eco.core.items.TestableItem;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+public interface CraftingRecipe {
+    /**
+     * Test matrix against recipe.
+     *
+     * @param matrix The matrix to check.
+     * @return If the recipe matches.
+     */
+    boolean test(@NotNull ItemStack[] matrix);
+
+    /**
+     * Register the recipe.
+     */
+    void register();
+
+    /**
+     * The recipe parts.
+     *
+     * @return The parts.
+     */
+    List<TestableItem> getParts();
+
+    /**
+     * Get the recipe key.
+     *
+     * @return The key.
+     */
+    NamespacedKey getKey();
+
+    /**
+     * Get the displayed recipe key.
+     *
+     * @return The key.
+     */
+    NamespacedKey getDisplayedKey();
+
+    /**
+     * Get the recipe output.
+     *
+     * @return The output.
+     */
+    ItemStack getOutput();
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/recipes/RecipePosition.java

@@ -0,0 +1,65 @@
+package com.willfp.eco.core.recipe.recipes;
+
+import lombok.Getter;
+
+public enum RecipePosition {
+    /**
+     * Top left of matrix.
+     */
+    TOP_LEFT(0),
+
+    /**
+     * Top middle of matrix.
+     */
+    TOP_MIDDLE(1),
+
+    /**
+     * Top right of matrix.
+     */
+    TOP_RIGHT(2),
+
+    /**
+     * Middle left of matrix.
+     */
+    MIDDLE_LEFT(3),
+
+    /**
+     * Middle of matrix.
+     */
+    MIDDLE(4),
+
+    /**
+     * Middle right of matrix.
+     */
+    MIDDLE_RIGHT(5),
+
+    /**
+     * Bottom left of matrix.
+     */
+    BOTTOM_LEFT(6),
+
+    /**
+     * Bottom middle of matrix.
+     */
+    BOTTOM_MIDDLE(7),
+
+    /**
+     * Bottom right of matrix.
+     */
+    BOTTOM_RIGHT(8);
+
+    /**
+     * The index within a crafting table matrix.
+     */
+    @Getter
+    private final int index;
+
+    /**
+     * Recipe position with crafting table index.
+     *
+     * @param index The index.
+     */
+    RecipePosition(final int index) {
+        this.index = index;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/recipe/recipes/ShapedCraftingRecipe.java

@@ -0,0 +1,192 @@
+package com.willfp.eco.core.recipe.recipes;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.items.TestableItem;
+import com.willfp.eco.core.recipe.Recipes;
+import com.willfp.eco.core.recipe.parts.EmptyTestableItem;
+import lombok.Getter;
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.RecipeChoice;
+import org.bukkit.inventory.ShapedRecipe;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+@SuppressWarnings("deprecation")
+public final class ShapedCraftingRecipe extends PluginDependent implements CraftingRecipe {
+    /**
+     * Recipe parts.
+     */
+    @Getter
+    private final List<TestableItem> parts;
+
+    /**
+     * The key of the recipe.
+     */
+    @Getter
+    private final NamespacedKey key;
+
+    /**
+     * The key of the displayed recipe.
+     */
+    @Getter
+    private final NamespacedKey displayedKey;
+
+    /**
+     * The recipe's output.
+     */
+    @Getter
+    private final ItemStack output;
+
+    private ShapedCraftingRecipe(@NotNull final EcoPlugin plugin,
+                                 @NotNull final String key,
+                                 @NotNull final List<TestableItem> parts,
+                                 @NotNull final ItemStack output) {
+        super(plugin);
+
+        this.parts = parts;
+        this.key = plugin.getNamespacedKeyFactory().create(key);
+        this.displayedKey = plugin.getNamespacedKeyFactory().create(key + "_displayed");
+        this.output = output;
+    }
+
+    @Override
+    public boolean test(@NotNull final ItemStack[] matrix) {
+        boolean matches = true;
+        for (int i = 0; i < 9; i++) {
+            if (!parts.get(i).matches(matrix[i])) {
+                matches = false;
+            }
+        }
+
+        return matches;
+    }
+
+    @Override
+    public void register() {
+        Recipes.register(this);
+
+        Bukkit.getServer().removeRecipe(this.getKey());
+        Bukkit.getServer().removeRecipe(this.getDisplayedKey());
+
+        ShapedRecipe shapedRecipe = new ShapedRecipe(this.getKey(), this.getOutput());
+        shapedRecipe.shape("012", "345", "678");
+        for (int i = 0; i < 9; i++) {
+            char character = String.valueOf(i).toCharArray()[0];
+            shapedRecipe.setIngredient(character, parts.get(i).getItem().getType());
+        }
+
+        ShapedRecipe displayedRecipe = new ShapedRecipe(this.getDisplayedKey(), this.getOutput());
+        displayedRecipe.shape("012", "345", "678");
+        for (int i = 0; i < 9; i++) {
+            char character = String.valueOf(i).toCharArray()[0];
+            displayedRecipe.setIngredient(character, new RecipeChoice.ExactChoice(parts.get(i).getItem()));
+        }
+
+        Bukkit.getServer().addRecipe(shapedRecipe);
+        Bukkit.getServer().addRecipe(displayedRecipe);
+    }
+
+    /**
+     * Create a new recipe builder.
+     *
+     * @param plugin The plugin that owns the recipe.
+     * @param key    The recipe key.
+     * @return A new builder.
+     */
+    public static Builder builder(@NotNull final EcoPlugin plugin,
+                                  @NotNull final String key) {
+        return new Builder(plugin, key);
+    }
+
+    public static final class Builder {
+        /**
+         * The recipe parts.
+         */
+        private final List<TestableItem> recipeParts = new ArrayList<>(Arrays.asList(null, null, null, null, null, null, null, null, null)); // Jank
+
+        /**
+         * The output of the recipe.
+         */
+        private ItemStack output = null;
+
+        /**
+         * The key of the recipe.
+         */
+        private final String key;
+
+        /**
+         * The plugin that created the recipe.
+         */
+        private final EcoPlugin plugin;
+
+        /**
+         * Create a new recipe builder.
+         *
+         * @param plugin The plugin that owns the recipe.
+         * @param key    The recipe key.
+         */
+        private Builder(@NotNull final EcoPlugin plugin,
+                        @NotNull final String key) {
+            this.key = key;
+            this.plugin = plugin;
+        }
+
+        /**
+         * Set a recipe part.
+         *
+         * @param position The position of the recipe within a crafting matrix.
+         * @param part     The part of the recipe.
+         * @return The builder.
+         */
+        public Builder setRecipePart(@NotNull final RecipePosition position,
+                                     @NotNull final TestableItem part) {
+            recipeParts.set(position.getIndex(), part);
+            return this;
+        }
+
+        /**
+         * Set a recipe part.
+         *
+         * @param position The position of the recipe within a crafting matrix.
+         * @param part     The part of the recipe.
+         * @return The builder.
+         */
+        public Builder setRecipePart(final int position,
+                                     @NotNull final TestableItem part) {
+            recipeParts.set(position, part);
+            return this;
+        }
+
+        /**
+         * Set the output of the recipe.
+         *
+         * @param output The output.
+         * @return The builder.
+         */
+        public Builder setOutput(@NotNull final ItemStack output) {
+            this.output = output;
+            return this;
+        }
+
+        /**
+         * Build the recipe.
+         *
+         * @return The built recipe.
+         */
+        public ShapedCraftingRecipe build() {
+            for (int i = 0; i < 9; i++) {
+                if (recipeParts.get(i) == null) {
+                    recipeParts.set(i, new EmptyTestableItem());
+                }
+            }
+
+            return new ShapedCraftingRecipe(plugin, key.toLowerCase(), recipeParts, output);
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/scheduling/RunnableTask.java

@@ -0,0 +1,59 @@
+package com.willfp.eco.core.scheduling;
+
+import org.bukkit.scheduler.BukkitTask;
+import org.jetbrains.annotations.NotNull;
+
+public interface RunnableTask extends Runnable {
+    /**
+     * Run the task.
+     *
+     * @return The created {@link BukkitTask}.
+     */
+    @NotNull BukkitTask runTask();
+
+    /**
+     * Run the task asynchronously.
+     *
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskAsynchronously();
+
+    /**
+     * Run the task after a specified number of ticks.
+     *
+     * @param delay The number of ticks to wait.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskLater(long delay);
+
+    /**
+     * Run the task asynchronously after a specified number of ticks.
+     *
+     * @param delay The number of ticks to wait.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskLaterAsynchronously(long delay);
+
+    /**
+     * Run the task repeatedly on a timer.
+     *
+     * @param delay  The delay before the task is first ran (in ticks).
+     * @param period The ticks elapsed before the task is ran again.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskTimer(long delay, long period);
+
+    /**
+     * Run the task repeatedly on a timer asynchronously.
+     *
+     * @param delay  The delay before the task is first ran (in ticks).
+     * @param period The ticks elapsed before the task is ran again.
+     * @return The created {@link BukkitTask}
+     */
+    @NotNull BukkitTask runTaskTimerAsynchronously(long delay, long period);
+
+    /**
+     * Cancel the task.
+     */
+    void cancel();
+}

eco-api/src/main/java/com/willfp/eco/core/scheduling/Scheduler.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.bukkit.scheduling;
+package com.willfp.eco.core.scheduling;
 
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.scheduler.BukkitTask;
 import org.jetbrains.annotations.NotNull;
 
@@ -12,7 +12,8 @@ public interface Scheduler {
      * @param ticksLater The amount of ticks to wait before execution.
      * @return The created {@link BukkitTask}.
      */
-    BukkitTask runLater(@NotNull Runnable runnable, long ticksLater);
+    BukkitTask runLater(@NotNull Runnable runnable,
+                        long ticksLater);
 
     /**
      * Run the task repeatedly on a timer.
@@ -22,7 +23,9 @@ public interface Scheduler {
      * @param repeat   The amount of ticks to wait between executions.
      * @return The created {@link BukkitTask}.
      */
-    BukkitTask runTimer(@NotNull Runnable runnable, long delay, long repeat);
+    BukkitTask runTimer(@NotNull Runnable runnable,
+                        long delay,
+                        long repeat);
 
     /**
      * Run the task repeatedly and asynchronously on a timer.
@@ -32,7 +35,9 @@ public interface Scheduler {
      * @param repeat   The amount of ticks to wait between executions.
      * @return The created {@link BukkitTask}.
      */
-    BukkitTask runAsyncTimer(@NotNull Runnable runnable, long delay, long repeat);
+    BukkitTask runAsyncTimer(@NotNull Runnable runnable,
+                             long delay,
+                             long repeat);
 
     /**
      * Run the task.
@@ -58,10 +63,12 @@ public interface Scheduler {
      * @param repeat   The amount of ticks to wait between executions.
      * @return The id of the task.
      */
-    int syncRepeating(@NotNull Runnable runnable, long delay, long repeat);
+    int syncRepeating(@NotNull Runnable runnable,
+                      long delay,
+                      long repeat);
 
     /**
-     * Cancel all running tasks from the linked {@link AbstractEcoPlugin}.
+     * Cancel all running tasks from the linked {@link EcoPlugin}.
      */
     void cancelAll();
 }

eco-api/src/main/java/com/willfp/eco/core/tuples/Pair.java

@@ -1,14 +1,12 @@
-package com.willfp.eco.util.tuplets;
+package com.willfp.eco.core.tuples;
 
 import lombok.Getter;
 import lombok.Setter;
-import lombok.ToString;
 import org.jetbrains.annotations.Nullable;
 
-@ToString
 public class Pair<A, B> {
     /**
-     * The first value in the pair.
+     * The first item in the tuple.
      */
     @Getter
     @Setter
@@ -16,7 +14,7 @@ public class Pair<A, B> {
     private A first;
 
     /**
-     * The second value in the pair.
+     * The second item in the tuple.
      */
     @Getter
     @Setter

eco-api/src/main/java/com/willfp/eco/core/tuples/Triplet.java

@@ -0,0 +1,30 @@
+package com.willfp.eco.core.tuples;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.jetbrains.annotations.Nullable;
+
+public class Triplet<A, B, C> extends Pair<A, B> {
+    /**
+     * The third item in the tuple.
+     */
+    @Getter
+    @Setter
+    @Nullable
+    private C third;
+
+    /**
+     * Create a triple of values.
+     *
+     * @param first  The first item in the pair.
+     * @param second The second item in the pair.
+     * @param third  The third item in the pair.
+     */
+    public Triplet(@Nullable final A first,
+                   @Nullable final B second,
+                   @Nullable final C third) {
+        super(first, second);
+
+        this.third = third;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/UpdateChecker.java

@@ -1,7 +1,7 @@
-package com.willfp.eco.util.updater;
+package com.willfp.eco.internal;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.util.Consumer;
 import org.jetbrains.annotations.NotNull;
 
@@ -16,7 +16,7 @@ public class UpdateChecker extends PluginDependent {
      *
      * @param plugin The plugin to check.
      */
-    public UpdateChecker(@NotNull final AbstractEcoPlugin plugin) {
+    public UpdateChecker(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 

eco-api/src/main/java/com/willfp/eco/internal/arrows/ArrowDataListener.java

@@ -1,9 +1,8 @@
-package com.willfp.eco.util.arrows;
+package com.willfp.eco.internal.arrows;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
 import org.bukkit.Material;
-import org.bukkit.enchantments.Enchantment;
 import org.bukkit.entity.Arrow;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.event.EventHandler;
@@ -14,16 +13,14 @@ import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.Map;
-
 public class ArrowDataListener extends PluginDependent implements Listener {
     /**
      * Listener to add metadata to arrows about the enchantments on the bow that shot them.
      *
-     * @param plugin The {@link AbstractEcoPlugin} that registered the listener.
+     * @param plugin The {@link EcoPlugin} that registered the listener.
      */
     @ApiStatus.Internal
-    public ArrowDataListener(@NotNull final AbstractEcoPlugin plugin) {
+    public ArrowDataListener(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 
@@ -54,7 +51,6 @@ public class ArrowDataListener extends PluginDependent implements Listener {
             return;
         }
 
-        Map<Enchantment, Integer> enchantments = item.getItemMeta().getEnchants();
-        arrow.setMetadata("enchantments", this.getPlugin().getMetadataValueFactory().create(enchantments));
+        arrow.setMetadata("shot-from", this.getPlugin().getMetadataValueFactory().create(item));
     }
 }

eco-api/src/main/java/com/willfp/eco/internal/config/ConfigSection.java

@@ -0,0 +1,15 @@
+package com.willfp.eco.internal.config;
+
+import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.NotNull;
+
+public class ConfigSection extends ConfigWrapper<ConfigurationSection> {
+    /**
+     * Config section.
+     *
+     * @param section    The section.
+     */
+    protected ConfigSection(@NotNull final ConfigurationSection section) {
+        this.init(section);
+    }
+}

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

@@ -0,0 +1,264 @@
+package com.willfp.eco.internal.config;
+
+import com.willfp.eco.util.StringUtils;
+import com.willfp.eco.core.config.Config;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.bukkit.configuration.ConfigurationSection;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+
+@SuppressWarnings({"unchecked", "unused"})
+public abstract class ConfigWrapper<T extends ConfigurationSection> implements Config {
+    /**
+     * The linked {@link ConfigurationSection} where values are physically stored.
+     */
+    @Getter
+    private T handle = null;
+
+    /**
+     * Cached values for faster reading.
+     */
+    private final Map<String, Object> cache = new HashMap<>();
+
+    /**
+     * Abstract config.
+     */
+    protected ConfigWrapper() {
+
+    }
+
+    protected Config init(@NotNull final T config) {
+        this.handle = config;
+        return this;
+    }
+
+    @Override
+    public final void clearCache() {
+        cache.clear();
+    }
+
+    @Override
+    public boolean has(@NotNull final String path) {
+        return handle.contains(path);
+    }
+
+    @NotNull
+    @Override
+    public List<String> getKeys(final boolean deep) {
+        return new ArrayList<>(handle.getKeys(deep));
+    }
+
+    @Override
+    @Nullable
+    public Object get(@NotNull final String path) {
+        return handle.get(path);
+    }
+
+    @Override
+    public void set(@NotNull final String path,
+                    @Nullable final Object object) {
+        handle.set(path, object);
+    }
+
+    @Override
+    @NotNull
+    public Config getSubsection(@NotNull final String path) {
+        Config subsection = getSubsectionOrNull(path);
+        Validate.notNull(subsection);
+        return subsection;
+    }
+
+    @Override
+    @Nullable
+    public Config getSubsectionOrNull(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (Config) cache.get(path);
+        } else {
+            cache.put(path, new ConfigSection(Objects.requireNonNull(handle.getConfigurationSection(path))));
+            return getSubsectionOrNull(path);
+        }
+    }
+
+    @Override
+    public int getInt(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (int) cache.get(path);
+        } else {
+            cache.put(path, handle.getInt(path, 0));
+            return getInt(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public Integer getIntOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getInt(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public int getInt(@NotNull final String path,
+                      final int def) {
+        if (cache.containsKey(path)) {
+            return (int) cache.get(path);
+        } else {
+            cache.put(path, handle.getInt(path, def));
+            return getInt(path);
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Integer> getInts(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<Integer>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getIntegerList(path)) : new ArrayList<>());
+            return getInts(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<Integer> getIntsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getInts(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public boolean getBool(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (boolean) cache.get(path);
+        } else {
+            cache.put(path, handle.getBoolean(path));
+            return getBool(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public Boolean getBoolOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getBool(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Boolean> getBools(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<Boolean>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getBooleanList(path)) : new ArrayList<>());
+            return getBools(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<Boolean> getBoolsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getBools(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public String getString(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (String) cache.get(path);
+        } else {
+            cache.put(path, StringUtils.translate(Objects.requireNonNull(handle.getString(path, ""))));
+            return getString(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public String getStringOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getString(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<String> getStrings(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<String>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getStringList(path)) : new ArrayList<>());
+            return getStrings(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<String> getStringsOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getStrings(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public double getDouble(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (double) cache.get(path);
+        } else {
+            cache.put(path, handle.getDouble(path));
+            return getDouble(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public Double getDoubleOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDouble(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<Double> getDoubles(@NotNull final String path) {
+        if (cache.containsKey(path)) {
+            return (List<Double>) cache.get(path);
+        } else {
+            cache.put(path, has(path) ? new ArrayList<>(handle.getDoubleList(path)) : new ArrayList<>());
+            return getDoubles(path);
+        }
+    }
+
+    @Override
+    @Nullable
+    public List<Double> getDoublesOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDoubles(path);
+        } else {
+            return null;
+        }
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/LoadableYamlConfig.java

@@ -0,0 +1,156 @@
+package com.willfp.eco.internal.config;
+
+import com.willfp.eco.core.EcoPlugin;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.bukkit.configuration.InvalidConfigurationException;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.OutputStream;
+import java.nio.charset.StandardCharsets;
+
+public abstract class LoadableYamlConfig extends ConfigWrapper<YamlConfiguration> {
+    /**
+     * The physical config file, as stored on disk.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final File configFile;
+
+    /**
+     * Plugin handle.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final EcoPlugin plugin;
+
+    /**
+     * The full name of the config file (eg config.yml).
+     */
+    @Getter
+    private final String name;
+
+    /**
+     * The subdirectory path.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final String subDirectoryPath;
+
+    /**
+     * The provider of the config.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final Class<?> source;
+
+    /**
+     * Abstract 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.
+     */
+    protected LoadableYamlConfig(@NotNull final String configName,
+                                 @NotNull final EcoPlugin plugin,
+                                 @NotNull final String subDirectoryPath,
+                                 @NotNull final Class<?> source) {
+        this.plugin = plugin;
+        this.name = configName + ".yml";
+        this.source = source;
+        this.subDirectoryPath = subDirectoryPath;
+
+        File directory = new File(this.getPlugin().getDataFolder(), subDirectoryPath);
+        if (!directory.exists()) {
+            directory.mkdirs();
+        }
+
+        if (!new File(directory, this.name).exists()) {
+            createFile();
+        }
+
+        this.configFile = new File(directory, this.name);
+        init(YamlConfiguration.loadConfiguration(configFile));
+    }
+
+    private void createFile() {
+        String resourcePath = getResourcePath();
+        InputStream in = source.getResourceAsStream(resourcePath);
+
+        File outFile = new File(this.getPlugin().getDataFolder(), resourcePath);
+        int lastIndex = resourcePath.lastIndexOf('/');
+        File outDir = new File(this.getPlugin().getDataFolder(), resourcePath.substring(0, Math.max(lastIndex, 0)));
+
+        if (!outDir.exists()) {
+            outDir.mkdirs();
+        }
+
+        try {
+            if (!outFile.exists()) {
+                OutputStream out = new FileOutputStream(outFile);
+                byte[] buf = new byte[1024];
+                int len;
+                while ((len = in.read(buf)) > 0) {
+                    out.write(buf, 0, len);
+                }
+                out.close();
+                in.close();
+            }
+        } catch (IOException ignored) {
+        }
+    }
+
+    /**
+     * Get resource path as relative to base directory.
+     *
+     * @return The resource path.
+     */
+    protected String getResourcePath() {
+        String resourcePath;
+
+        if (subDirectoryPath.isEmpty()) {
+            resourcePath = name;
+        } else {
+            resourcePath = subDirectoryPath + name;
+        }
+
+        return "/" + resourcePath;
+    }
+
+    /**
+     * Get YamlConfiguration as found in jar.
+     *
+     * @return The YamlConfiguration.
+     */
+    protected YamlConfiguration getConfigInJar() {
+        InputStream newIn = source.getResourceAsStream(getResourcePath());
+
+        if (newIn == null) {
+            throw new NullPointerException(name + " is null?");
+        }
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(newIn, StandardCharsets.UTF_8));
+        YamlConfiguration newConfig = new YamlConfiguration();
+
+        try {
+            newConfig.load(reader);
+        } catch (IOException | InvalidConfigurationException e) {
+            e.printStackTrace();
+        }
+
+        return newConfig;
+    }
+
+    /**
+     * Save the config.
+     *
+     * @throws IOException If error in saving.
+     */
+    public void save() throws IOException {
+        this.getHandle().save(this.getConfigFile());
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/config/UpdatableYamlConfig.java

@@ -0,0 +1,87 @@
+package com.willfp.eco.internal.config;
+
+import com.willfp.eco.core.EcoPlugin;
+import org.bukkit.configuration.InvalidConfigurationException;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public abstract class UpdatableYamlConfig extends LoadableYamlConfig {
+    /**
+     * Whether keys not in the base config should be removed on update.
+     */
+    private final boolean removeUnused;
+
+    /**
+     * List of blacklisted update keys.
+     */
+    private final List<String> updateBlacklist;
+
+    /**
+     * 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 updateBlacklist  Substring of keys to not add/remove keys for.
+     */
+    protected UpdatableYamlConfig(@NotNull final String configName,
+                                  @NotNull final EcoPlugin plugin,
+                                  @NotNull final String subDirectoryPath,
+                                  @NotNull final Class<?> source,
+                                  final boolean removeUnused,
+                                  @NotNull final String... updateBlacklist) {
+        super(configName, plugin, subDirectoryPath, source);
+        this.removeUnused = removeUnused;
+        this.updateBlacklist = new ArrayList<>(Arrays.asList(updateBlacklist));
+        this.updateBlacklist.removeIf(String::isEmpty);
+
+        update();
+    }
+
+    /**
+     * Update the config.
+     * <p>
+     * Writes missing values, however removes comments due to how configs are stored internally in bukkit.
+     */
+    public void update() {
+        super.clearCache();
+        try {
+            this.getHandle().load(this.getConfigFile());
+
+            YamlConfiguration newConfig = this.getConfigInJar();
+
+            if (newConfig.getKeys(true).equals(this.getHandle().getKeys(true))) {
+                return;
+            }
+
+            newConfig.getKeys(true).forEach((s -> {
+                if (!this.getHandle().getKeys(true).contains(s)) {
+                    if (updateBlacklist.stream().noneMatch(s::contains)) {
+                        this.getHandle().set(s, newConfig.get(s));
+                    }
+                }
+            }));
+
+            if (this.removeUnused) {
+                this.getHandle().getKeys(true).forEach((s -> {
+                    if (!newConfig.getKeys(true).contains(s)) {
+                        if (updateBlacklist.stream().noneMatch(s::contains)) {
+                            this.getHandle().set(s, null);
+                        }
+                    }
+                }));
+            }
+
+            this.getHandle().save(this.getConfigFile());
+        } catch (IOException | InvalidConfigurationException e) {
+            e.printStackTrace();
+        }
+    }
+}

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

@@ -1,10 +1,10 @@
-package com.willfp.eco.util.config.updating;
+package com.willfp.eco.internal.config.updating;
 
-import com.willfp.eco.util.config.updating.annotations.ConfigUpdater;
-import com.willfp.eco.util.config.updating.exceptions.InvalidUpdatableClassException;
-import com.willfp.eco.util.config.updating.exceptions.InvalidUpdateMethodException;
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.config.ConfigUpdater;
+import com.willfp.eco.internal.config.updating.exceptions.InvalidUpdatableClassException;
+import com.willfp.eco.internal.config.updating.exceptions.InvalidUpdateMethodException;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.jetbrains.annotations.NotNull;
 
 import java.lang.reflect.InvocationTargetException;
@@ -21,11 +21,11 @@ public class ConfigHandler extends PluginDependent {
     private final Set<Class<?>> updatableClasses = new HashSet<>();
 
     /**
-     * Creates a new config handler and links it to an {@link AbstractEcoPlugin}.
+     * Creates a new config handler and links it to an {@link EcoPlugin}.
      *
      * @param plugin The plugin to manage.
      */
-    public ConfigHandler(@NotNull final AbstractEcoPlugin plugin) {
+    public ConfigHandler(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 

eco-api/src/main/java/com/willfp/eco/internal/config/updating/exceptions/InvalidUpdatableClassException.java

@@ -1,6 +1,6 @@
-package com.willfp.eco.util.config.updating.exceptions;
+package com.willfp.eco.internal.config.updating.exceptions;
 
-import com.willfp.eco.util.config.updating.ConfigHandler;
+import com.willfp.eco.internal.config.updating.ConfigHandler;
 import org.jetbrains.annotations.NotNull;
 
 public class InvalidUpdatableClassException extends RuntimeException {

eco-api/src/main/java/com/willfp/eco/internal/config/updating/exceptions/InvalidUpdateMethodException.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.config.updating.exceptions;
+package com.willfp.eco.internal.config.updating.exceptions;
 
 import org.jetbrains.annotations.NotNull;
 

eco-api/src/main/java/com/willfp/eco/internal/drops/AbstractDropQueue.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops;
 
 import org.bukkit.Location;
 import org.bukkit.inventory.ItemStack;

eco-api/src/main/java/com/willfp/eco/internal/drops/DropManager.java

@@ -0,0 +1,25 @@
+package com.willfp.eco.internal.drops;
+
+import lombok.Getter;
+import lombok.experimental.UtilityClass;
+import org.jetbrains.annotations.NotNull;
+
+@UtilityClass
+public final class DropManager {
+    /**
+     * The currently used type, or implementation, of {@link AbstractDropQueue}.
+     * <p>
+     * Default is {@link DropQueueType#COLLATED}, however this can be changed.
+     */
+    @Getter
+    private DropQueueType type = DropQueueType.COLLATED;
+
+    /**
+     * Sets the type of Drop Queue to be used.
+     *
+     * @param type The type.
+     */
+    public static void setType(@NotNull final DropQueueType type) {
+        DropManager.type = type;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/drops/DropQueueType.java

@@ -1,4 +1,4 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops;
 
 public enum DropQueueType {
     /**

eco-api/src/main/java/com/willfp/eco/internal/drops/impl/FastCollatedDropQueue.java

@@ -1,7 +1,6 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops.impl;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.internal.drops.AbstractDropQueue;
 import lombok.Getter;
 import lombok.Setter;
 import lombok.ToString;
@@ -9,14 +8,11 @@ import lombok.experimental.Accessors;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.scheduler.BukkitTask;
-import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-
+import java.util.concurrent.ConcurrentHashMap;
 
 public class FastCollatedDropQueue extends InternalDropQueue {
     /**
@@ -24,7 +20,7 @@ public class FastCollatedDropQueue extends InternalDropQueue {
      * <p>
      * Cleared and updated every tick.
      */
-    private static final HashMap<Player, CollatedDrops> COLLATED_MAP = new HashMap<>();
+    public static final Map<Player, CollatedDrops> COLLATED_MAP = new ConcurrentHashMap<>();
 
     /**
      * Backend implementation of {@link AbstractDropQueue}
@@ -39,7 +35,7 @@ public class FastCollatedDropQueue extends InternalDropQueue {
     }
 
     /**
-     * Queues the drops to be managed by the {@link CollatedRunnable}.
+     * Queues the drops to be managed by the runnable.
      */
     @Override
     public void push() {
@@ -52,7 +48,7 @@ public class FastCollatedDropQueue extends InternalDropQueue {
      * The items, location, and xp linked to a player's drops.
      */
     @ToString
-    private static final class CollatedDrops {
+    public static final class CollatedDrops {
         /**
          * A collection of all ItemStacks to be dropped at the end of the tick.
          */
@@ -103,32 +99,4 @@ public class FastCollatedDropQueue extends InternalDropQueue {
             return this;
         }
     }
-
-    public static class CollatedRunnable extends PluginDependent {
-        /**
-         * The {@link BukkitTask} that the runnable represents.
-         */
-        @Getter
-        private final BukkitTask runnableTask;
-
-        /**
-         * Create and run a new runnable to process collated drops.
-         *
-         * @param plugin The {@link AbstractEcoPlugin} that manages the processing.
-         */
-        @ApiStatus.Internal
-        public CollatedRunnable(@NotNull final AbstractEcoPlugin plugin) {
-            super(plugin);
-            runnableTask = plugin.getScheduler().runTimer(() -> {
-                for (Map.Entry<Player, CollatedDrops> entry : COLLATED_MAP.entrySet()) {
-                    new InternalDropQueue(entry.getKey())
-                            .setLocation(entry.getValue().getLocation())
-                            .addItems(entry.getValue().getDrops())
-                            .addXP(entry.getValue().getXp())
-                            .push();
-                }
-                COLLATED_MAP.clear();
-            }, 0, 1);
-        }
-    }
 }

eco-api/src/main/java/com/willfp/eco/internal/drops/impl/InternalDropQueue.java

@@ -1,10 +1,12 @@
-package com.willfp.eco.util.drops.internal;
+package com.willfp.eco.internal.drops.impl;
 
-import com.willfp.eco.util.drops.telekinesis.TelekinesisUtils;
+import com.willfp.eco.internal.drops.AbstractDropQueue;
+import com.willfp.eco.util.TelekinesisUtils;
 import lombok.AccessLevel;
 import lombok.Getter;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
+import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.ExperienceOrb;
@@ -133,6 +135,11 @@ public class InternalDropQueue implements AbstractDropQueue {
         assert world != null;
         loc = loc.add(0.5, 0.5, 0.5);
 
+        items.removeIf(itemStack -> itemStack.getType() == Material.AIR);
+        if (items.isEmpty()) {
+            return;
+        }
+
         if (hasTelekinesis) {
             HashMap<Integer, ItemStack> leftover = player.getInventory().addItem(items.toArray(new ItemStack[0]));
             for (ItemStack drop : leftover.values()) {

eco-api/src/main/java/com/willfp/eco/internal/events/EcoEventManager.java

@@ -1,7 +1,8 @@
-package com.willfp.eco.util.bukkit.events;
+package com.willfp.eco.internal.events;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.events.EventManager;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.Bukkit;
 import org.bukkit.event.HandlerList;
 import org.bukkit.event.Listener;
@@ -11,13 +12,11 @@ import org.jetbrains.annotations.NotNull;
 public class EcoEventManager extends PluginDependent implements EventManager {
     /**
      * Manager class for event management.
-     * <p>
-     * Prevents calls to {@link AbstractEcoPlugin#getInstance()}.
      *
-     * @param plugin The {@link AbstractEcoPlugin} that this manages the events of.
+     * @param plugin The {@link EcoPlugin} that this manages the events of.
      */
     @ApiStatus.Internal
-    public EcoEventManager(@NotNull final AbstractEcoPlugin plugin) {
+    public EcoEventManager(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 

eco-api/src/main/java/com/willfp/eco/internal/extensions/EcoExtensionLoader.java

@@ -1,10 +1,12 @@
-package com.willfp.eco.util.extensions.loader;
+package com.willfp.eco.internal.extensions;
 
 
-import com.willfp.eco.util.extensions.Extension;
-import com.willfp.eco.util.extensions.MalformedExtensionException;
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.extensions.Extension;
+import com.willfp.eco.core.extensions.MalformedExtensionException;
+import com.willfp.eco.core.extensions.ExtensionLoader;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
+import org.apache.commons.lang.Validate;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.jetbrains.annotations.NotNull;
 
@@ -29,11 +31,11 @@ public class EcoExtensionLoader extends PluginDependent implements ExtensionLoad
     private final Set<Extension> extensions = new HashSet<>();
 
     /**
-     * Create a new extension loader and link it to a specific {@link AbstractEcoPlugin}.
+     * Create a new extension loader and link it to a specific {@link EcoPlugin}.
      *
      * @param plugin The plugin to manage
      */
-    public EcoExtensionLoader(@NotNull final AbstractEcoPlugin plugin) {
+    public EcoExtensionLoader(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 
@@ -61,7 +63,7 @@ public class EcoExtensionLoader extends PluginDependent implements ExtensionLoad
             try {
                 loadExtension(extensionJar);
             } catch (MalformedExtensionException e) {
-                this.getPlugin().getLog().error(extensionJar.getName() + " caused MalformedExtensionException: " + e.getMessage());
+                this.getPlugin().getLogger().severe(extensionJar.getName() + " caused MalformedExtensionException: " + e.getMessage());
             }
         }
     }
@@ -94,13 +96,16 @@ public class EcoExtensionLoader extends PluginDependent implements ExtensionLoad
         String mainClass = extensionYml.getString("main");
         String name = extensionYml.getString("name");
         String version = extensionYml.getString("version");
-        Extension.ExtensionMetadata metadata = new Extension.ExtensionMetadata(version, name);
+        Validate.notNull(name, "Name is missing!");
+        Validate.notNull(version, "Version is missing!");
+
+        ExtensionMetadata metadata = new ExtensionMetadata(version, name);
 
         Class<?> cls;
         Object object = null;
         try {
             cls = cl.loadClass(mainClass);
-            object = cls.getConstructor().newInstance();
+            object = cls.getConstructor(EcoPlugin.class).newInstance(this.getPlugin());
         } catch (ReflectiveOperationException e) {
             e.printStackTrace();
         }
@@ -124,15 +129,6 @@ public class EcoExtensionLoader extends PluginDependent implements ExtensionLoad
         extensions.clear();
     }
 
-    /**
-     * Unloads, then loads all extensions.
-     */
-    @Override
-    public void reloadExtensions() {
-        unloadExtensions();
-        loadExtensions();
-    }
-
     /**
      * Returns all loaded extensions.
      *

eco-api/src/main/java/com/willfp/eco/internal/extensions/ExtensionMetadata.java

@@ -0,0 +1,32 @@
+package com.willfp.eco.internal.extensions;
+
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+public class ExtensionMetadata {
+    /**
+     * The version of the extension.
+     */
+    @NotNull
+    @Getter
+    private final String version;
+
+    /**
+     * The extension's name.
+     */
+    @NotNull
+    @Getter
+    private final String name;
+
+    /**
+     * Create a new extension metadata.
+     *
+     * @param version The version for the extension to be.
+     * @param name    The name of the extension.
+     */
+    public ExtensionMetadata(@NotNull final String version,
+                             @NotNull final String name) {
+        this.version = version;
+        this.name = name;
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/factory/EcoMetadataValueFactory.java

@@ -1,26 +1,28 @@
-package com.willfp.eco.util.bukkit.meta;
+package com.willfp.eco.internal.factory;
 
-import com.willfp.eco.util.internal.PluginDependentFactory;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.factory.MetadataValueFactory;
 import org.bukkit.metadata.FixedMetadataValue;
 import org.jetbrains.annotations.NotNull;
 
-public class MetadataValueFactory extends PluginDependentFactory {
+public class EcoMetadataValueFactory extends PluginDependent implements MetadataValueFactory {
     /**
-     * Factory class to produce {@link FixedMetadataValue}s associated with an {@link AbstractEcoPlugin}.
+     * Factory class to produce {@link FixedMetadataValue}s associated with an {@link EcoPlugin}.
      *
      * @param plugin The plugin that this factory creates values for.
      */
-    public MetadataValueFactory(@NotNull final AbstractEcoPlugin plugin) {
+    public EcoMetadataValueFactory(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 
     /**
-     * Create an {@link FixedMetadataValue} associated with an {@link AbstractEcoPlugin} with a specified value.
+     * Create an {@link FixedMetadataValue} associated with an {@link EcoPlugin} with a specified value.
      *
      * @param value The value of meta key.
      * @return The created {@link FixedMetadataValue}.
      */
+    @Override
     public FixedMetadataValue create(@NotNull final Object value) {
         return new FixedMetadataValue(this.getPlugin(), value);
     }

eco-api/src/main/java/com/willfp/eco/internal/factory/EcoNamespacedKeyFactory.java

@@ -0,0 +1,22 @@
+package com.willfp.eco.internal.factory;
+
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.factory.NamespacedKeyFactory;
+import org.bukkit.NamespacedKey;
+import org.jetbrains.annotations.NotNull;
+
+public class EcoNamespacedKeyFactory extends PluginDependent implements NamespacedKeyFactory {
+    /**
+     * Factory class to produce {@link NamespacedKey}s associated with an {@link EcoPlugin}.
+     *
+     * @param plugin The plugin that this factory creates keys for.
+     */
+    public EcoNamespacedKeyFactory(@NotNull final EcoPlugin plugin) {
+        super(plugin);
+    }
+    @Override
+    public NamespacedKey create(@NotNull final String key) {
+        return new NamespacedKey(this.getPlugin(), key);
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/factory/EcoRunnableFactory.java

@@ -0,0 +1,31 @@
+package com.willfp.eco.internal.factory;
+
+import com.willfp.eco.core.factory.RunnableFactory;
+import com.willfp.eco.core.scheduling.RunnableTask;
+import com.willfp.eco.internal.scheduling.EcoRunnableTask;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Consumer;
+
+public class EcoRunnableFactory extends PluginDependent implements RunnableFactory {
+    /**
+     * Factory class to produce {@link RunnableTask}s associated with an {@link EcoPlugin}.
+     *
+     * @param plugin The plugin that this factory creates runnables for.
+     */
+    public EcoRunnableFactory(@NotNull final EcoPlugin plugin) {
+        super(plugin);
+    }
+
+    @Override
+    public RunnableTask create(@NotNull final Consumer<RunnableTask> consumer) {
+        return new EcoRunnableTask(this.getPlugin()) {
+            @Override
+            public void run() {
+                consumer.accept(this);
+            }
+        };
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/integrations/PlaceholderIntegrationPAPI.java

@@ -1,8 +1,8 @@
-package com.willfp.eco.util.integrations.placeholder.plugins;
+package com.willfp.eco.internal.integrations;
 
-import com.willfp.eco.util.integrations.placeholder.PlaceholderIntegration;
-import com.willfp.eco.util.integrations.placeholder.PlaceholderManager;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.integrations.placeholder.PlaceholderIntegration;
+import com.willfp.eco.core.integrations.placeholder.PlaceholderManager;
 import me.clip.placeholderapi.PlaceholderAPI;
 import me.clip.placeholderapi.expansion.PlaceholderExpansion;
 import org.bukkit.entity.Player;
@@ -13,14 +13,14 @@ public class PlaceholderIntegrationPAPI extends PlaceholderExpansion implements
     /**
      * The linked plugin.
      */
-    private final AbstractEcoPlugin plugin;
+    private final EcoPlugin plugin;
 
     /**
      * Create a new PlaceholderAPI integration.
      *
      * @param plugin The plugin to manage placeholders for.
      */
-    public PlaceholderIntegrationPAPI(@NotNull final AbstractEcoPlugin plugin) {
+    public PlaceholderIntegrationPAPI(@NotNull final EcoPlugin plugin) {
         this.plugin = plugin;
     }
 
@@ -36,7 +36,7 @@ public class PlaceholderIntegrationPAPI extends PlaceholderExpansion implements
 
     @Override
     public @NotNull String getAuthor() {
-        return "Auxilor";
+        return String.join(", ", plugin.getDescription().getAuthors());
     }
 
     @Override

eco-api/src/main/java/com/willfp/eco/internal/logging/EcoLogger.java

@@ -0,0 +1,32 @@
+package com.willfp.eco.internal.logging;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.util.StringUtils;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class EcoLogger extends Logger {
+    public EcoLogger(@NotNull final EcoPlugin plugin) {
+        super(plugin.getName(), (String) null);
+        String prefix = plugin.getDescription().getPrefix();
+        this.setParent(plugin.getServer().getLogger());
+        this.setLevel(Level.ALL);
+    }
+
+    @Override
+    public void info(@NotNull final String msg) {
+        super.info(StringUtils.translate(msg));
+    }
+
+    @Override
+    public void warning(@NotNull final String msg) {
+        super.warning(StringUtils.translate(msg));
+    }
+
+    @Override
+    public void severe(@NotNull final String msg) {
+        super.severe(StringUtils.translate(msg));
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/scheduling/EcoRunnableTask.java

@@ -0,0 +1,73 @@
+package com.willfp.eco.internal.scheduling;
+
+import com.willfp.eco.internal.factory.EcoRunnableFactory;
+import com.willfp.eco.core.scheduling.RunnableTask;
+import com.willfp.eco.core.EcoPlugin;
+import org.bukkit.scheduler.BukkitRunnable;
+import org.bukkit.scheduler.BukkitTask;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class EcoRunnableTask extends BukkitRunnable implements RunnableTask {
+    /**
+     * The linked {@link EcoPlugin} to associate runnables with.
+     */
+    private final EcoPlugin plugin;
+
+    /**
+     * Creates a new {@link EcoRunnableTask}.
+     * <p>
+     * Cannot be instantiated normally, use {@link EcoRunnableFactory}.
+     *
+     * @param plugin The {@link EcoPlugin} to associate runnables with.
+     */
+    @ApiStatus.Internal
+    public EcoRunnableTask(@NotNull final EcoPlugin plugin) {
+        this.plugin = plugin;
+    }
+
+    /**
+     * Get the {@link EcoPlugin} that created this runnable.
+     *
+     * @return The linked plugin.
+     */
+    protected final EcoPlugin getPlugin() {
+        return this.plugin;
+    }
+
+    @Override
+    @NotNull
+    public final synchronized BukkitTask runTask() {
+        return super.runTask(plugin);
+    }
+
+    @Override
+    @NotNull
+    public final synchronized BukkitTask runTaskAsynchronously() {
+        return super.runTaskAsynchronously(plugin);
+    }
+
+    @Override
+    @NotNull
+    public final synchronized BukkitTask runTaskLater(final long delay) {
+        return super.runTaskLater(plugin, delay);
+    }
+
+    @Override
+    @NotNull
+    public final synchronized BukkitTask runTaskLaterAsynchronously(final long delay) {
+        return super.runTaskLaterAsynchronously(plugin, delay);
+    }
+
+    @Override
+    @NotNull
+    public final synchronized BukkitTask runTaskTimer(final long delay, final long period) {
+        return super.runTaskTimer(plugin, delay, period);
+    }
+
+    @Override
+    @NotNull
+    public final synchronized BukkitTask runTaskTimerAsynchronously(final long delay, final long period) {
+        return super.runTaskTimerAsynchronously(plugin, delay, period);
+    }
+}

eco-api/src/main/java/com/willfp/eco/internal/scheduling/EcoScheduler.java

@@ -1,7 +1,8 @@
-package com.willfp.eco.util.bukkit.scheduling;
+package com.willfp.eco.internal.scheduling;
 
-import com.willfp.eco.util.internal.PluginDependent;
-import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.eco.core.scheduling.Scheduler;
+import com.willfp.eco.core.PluginDependent;
+import com.willfp.eco.core.EcoPlugin;
 import org.bukkit.Bukkit;
 import org.bukkit.scheduler.BukkitTask;
 import org.jetbrains.annotations.ApiStatus;
@@ -9,12 +10,12 @@ import org.jetbrains.annotations.NotNull;
 
 public class EcoScheduler extends PluginDependent implements Scheduler {
     /**
-     * Create a scheduler to manage the tasks of an {@link AbstractEcoPlugin}.
+     * Create a scheduler to manage the tasks of an {@link EcoPlugin}.
      *
      * @param plugin The plugin to manage.
      */
     @ApiStatus.Internal
-    public EcoScheduler(@NotNull final AbstractEcoPlugin plugin) {
+    public EcoScheduler(@NotNull final EcoPlugin plugin) {
         super(plugin);
     }
 
@@ -99,7 +100,7 @@ public class EcoScheduler extends PluginDependent implements Scheduler {
     }
 
     /**
-     * Cancel all running tasks from the linked {@link AbstractEcoPlugin}.
+     * Cancel all running tasks from the linked {@link EcoPlugin}.
      */
     @Override
     public void cancelAll() {

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

@@ -0,0 +1,96 @@
+package com.willfp.eco.util;
+
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang.Validate;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.function.BiConsumer;
+
+@UtilityClass
+public class BlockUtils {
+    /**
+     * If the meta set function has been set.
+     */
+    private boolean initialized = false;
+
+    /**
+     * The block break function.
+     */
+    private BiConsumer<Player, Block> blockBreakConsumer = null;
+
+    private Set<Block> getNearbyBlocks(@NotNull final Block start,
+                                       @NotNull final List<Material> allowedMaterials,
+                                       @NotNull final Set<Block> blocks,
+                                       final int limit) {
+        for (BlockFace face : BlockFace.values()) {
+            Block block = start.getRelative(face);
+            if (!blocks.contains(block) && allowedMaterials.contains(block.getType())) {
+                blocks.add(block);
+                if (blocks.size() > limit || blocks.size() > 2500) {
+                    return blocks;
+                }
+            }
+        }
+        // Running twice to get more spherical shape.
+        for (BlockFace face : BlockFace.values()) {
+            Block block = start.getRelative(face);
+            if (!blocks.contains(block) && allowedMaterials.contains(block.getType())) {
+                if (blocks.size() > limit || blocks.size() > 2500) {
+                    return blocks;
+                }
+                blocks.addAll(getNearbyBlocks(block, allowedMaterials, blocks, limit));
+            }
+        }
+        return blocks;
+    }
+
+    /**
+     * Get a set of all blocks in contact with each other of a specific type.
+     *
+     * @param start            The initial block.
+     * @param allowedMaterials A list of all valid {@link Material}s.
+     * @param limit            The maximum size of vein to return.
+     * @return A set of all {@link Block}s.
+     */
+    public Set<Block> getVein(@NotNull final Block start,
+                              @NotNull final List<Material> allowedMaterials,
+                              final int limit) {
+        return getNearbyBlocks(start, allowedMaterials, new HashSet<>(), limit);
+    }
+
+    /**
+     * Break the block as if the player had done it manually.
+     *
+     * @param player The player to break the block as.
+     * @param block  The block to break.
+     */
+    public void breakBlock(@NotNull final Player player,
+                           @NotNull final Block block) {
+        Validate.isTrue(initialized, "Must be initialized!");
+        Validate.notNull(blockBreakConsumer, "Must be initialized!");
+
+        blockBreakConsumer.accept(player, block);
+    }
+
+    /**
+     * Initialize the block break function.
+     *
+     * @param function The function.
+     */
+    @ApiStatus.Internal
+    public void initialize(@NotNull final BiConsumer<Player, Block> function) {
+        Validate.isTrue(!initialized, "Already initialized!");
+
+        blockBreakConsumer = function;
+
+        initialized = true;
+    }
+}

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

@@ -2,6 +2,7 @@ package com.willfp.eco.util;
 
 import lombok.experimental.UtilityClass;
 import org.bukkit.Bukkit;
+import org.bukkit.Material;
 import org.bukkit.Sound;
 import org.bukkit.SoundCategory;
 import org.bukkit.entity.Player;
@@ -37,25 +38,32 @@ public class DurabilityUtils {
             return;
         }
 
+        if (!(item.getItemMeta() instanceof Damageable)) {
+            return;
+        }
+
+        // Special edge case
+        if (item.getType() == Material.CARVED_PUMPKIN || item.getType() == Material.PLAYER_HEAD) {
+            return;
+        }
+
         PlayerItemDamageEvent event3 = new PlayerItemDamageEvent(player, item, damage);
         Bukkit.getPluginManager().callEvent(event3);
 
         if (!event3.isCancelled()) {
             int damage2 = event3.getDamage();
-            if (item.getItemMeta() instanceof Damageable) {
-                Damageable meta = (Damageable) item.getItemMeta();
-                meta.setDamage(meta.getDamage() + damage2);
+            Damageable meta = (Damageable) item.getItemMeta();
+            meta.setDamage(meta.getDamage() + damage2);
 
-                if (meta.getDamage() >= item.getType().getMaxDurability()) {
-                    meta.setDamage(item.getType().getMaxDurability());
-                    item.setItemMeta((ItemMeta) meta);
-                    PlayerItemBreakEvent event = new PlayerItemBreakEvent(player, item);
-                    Bukkit.getPluginManager().callEvent(event);
-                    player.getInventory().clear(slot);
-                    player.playSound(player.getLocation(), Sound.ENTITY_ITEM_BREAK, SoundCategory.BLOCKS, 1, 1);
-                } else {
-                    item.setItemMeta((ItemMeta) meta);
-                }
+            if (meta.getDamage() >= item.getType().getMaxDurability()) {
+                meta.setDamage(item.getType().getMaxDurability());
+                item.setItemMeta((ItemMeta) meta);
+                PlayerItemBreakEvent event = new PlayerItemBreakEvent(player, item);
+                Bukkit.getPluginManager().callEvent(event);
+                player.getInventory().clear(slot);
+                player.playSound(player.getLocation(), Sound.ENTITY_ITEM_BREAK, SoundCategory.BLOCKS, 1, 1);
+            } else {
+                item.setItemMeta((ItemMeta) meta);
             }
         }
     }
@@ -78,20 +86,22 @@ public class DurabilityUtils {
             return;
         }
 
+        if (!(item.getItemMeta() instanceof Damageable)) {
+            return;
+        }
+
         PlayerItemDamageEvent event3 = new PlayerItemDamageEvent(player, item, damage);
         Bukkit.getPluginManager().callEvent(event3);
 
         if (!event3.isCancelled()) {
             int damage2 = event3.getDamage();
-            if (item.getItemMeta() instanceof Damageable) {
-                Damageable meta = (Damageable) item.getItemMeta();
-                meta.setDamage(meta.getDamage() + damage2);
+            Damageable meta = (Damageable) item.getItemMeta();
+            meta.setDamage(meta.getDamage() + damage2);
 
-                if (meta.getDamage() >= item.getType().getMaxDurability()) {
-                    meta.setDamage(item.getType().getMaxDurability() - 1);
-                }
-                item.setItemMeta((ItemMeta) meta);
+            if (meta.getDamage() >= item.getType().getMaxDurability()) {
+                meta.setDamage(item.getType().getMaxDurability() - 1);
             }
+            item.setItemMeta((ItemMeta) meta);
         }
     }
 

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

@@ -1,13 +1,30 @@
 package com.willfp.eco.util;
 
 import lombok.experimental.UtilityClass;
+import org.jetbrains.annotations.NotNull;
 
 import java.text.DecimalFormat;
+import java.util.Map;
 import java.util.TreeMap;
 import java.util.concurrent.ThreadLocalRandom;
 
 @UtilityClass
 public class NumberUtils {
+    /**
+     * Precision.
+     */
+    private static final int FAST_TRIG_PRECISION = 100;
+
+    /**
+     * Modulus.
+     */
+    private static final int FAST_TRIG_MODULUS = 360 * FAST_TRIG_PRECISION;
+
+    /**
+     * Sin lookup table.
+     */
+    private static final double[] SIN_LOOKUP = new double[FAST_TRIG_MODULUS];
+
     /**
      * Set of roman numerals to look up.
      */
@@ -27,6 +44,34 @@ public class NumberUtils {
         NUMERALS.put(5, "V");
         NUMERALS.put(4, "IV");
         NUMERALS.put(1, "I");
+
+        for (int i = 0; i < SIN_LOOKUP.length; i++) {
+            SIN_LOOKUP[i] = Math.sin((i * Math.PI) / (FAST_TRIG_PRECISION * 180));
+        }
+    }
+
+    private static double sinLookup(final int a) {
+        return a >= 0 ? SIN_LOOKUP[a % FAST_TRIG_MODULUS] : -SIN_LOOKUP[-a % FAST_TRIG_MODULUS];
+    }
+
+    /**
+     * Get the sin of a number.
+     *
+     * @param a The number.
+     * @return The sin.
+     */
+    public static double fastSin(final double a) {
+        return sinLookup((int) (a * FAST_TRIG_PRECISION + 0.5f));
+    }
+
+    /**
+     * Get the cosine of a number.
+     *
+     * @param a The number.
+     * @return The cosine.
+     */
+    public static double fastCos(final double a) {
+        return sinLookup((int) ((a + 90f) * FAST_TRIG_PRECISION + 0.5f));
     }
 
     /**
@@ -85,6 +130,24 @@ public class NumberUtils {
         }
     }
 
+    /**
+     * Get number from roman numeral.
+     *
+     * @param numeral The numeral to convert.
+     * @return The number, converted from a roman numeral.
+     */
+    public static int fromNumeral(@NotNull final String numeral) {
+        if (numeral.isEmpty()) {
+            return 0;
+        }
+        for (Map.Entry<Integer, String> entry : NUMERALS.entrySet()) {
+            if (numeral.startsWith(entry.getValue())) {
+                return entry.getKey() + fromNumeral(numeral.substring(entry.getValue().length()));
+            }
+        }
+        return 0;
+    }
+
     /**
      * Generate random integer in range.
      *

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

@@ -0,0 +1,49 @@
+package com.willfp.eco.util;
+
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang.Validate;
+import org.bukkit.inventory.meta.SkullMeta;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.BiConsumer;
+
+@UtilityClass
+public class SkullUtils {
+    /**
+     * If the meta set function has been set.
+     */
+    private boolean initialized = false;
+
+    /**
+     * The meta set function.
+     */
+    private BiConsumer<SkullMeta, String> metaSetConsumer = null;
+
+    /**
+     * Set the texture of a skull from base64.
+     *
+     * @param meta   The meta to modify.
+     * @param base64 The base64 texture.
+     */
+    public void setSkullTexture(@NotNull final SkullMeta meta,
+                                @NotNull final String base64) {
+        Validate.isTrue(initialized, "Must be initialized!");
+        Validate.notNull(metaSetConsumer, "Must be initialized!");
+
+        metaSetConsumer.accept(meta, base64);
+    }
+
+    /**
+     * Initialize the skull texture function.
+     *
+     * @param function The function.
+     */
+    @ApiStatus.Internal
+    public void initialize(@NotNull final BiConsumer<SkullMeta, String> function) {
+        Validate.isTrue(!initialized, "Already initialized!");
+
+        metaSetConsumer = function;
+        initialized = true;
+    }
+}

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

@@ -0,0 +1,223 @@
+package com.willfp.eco.util;
+
+import com.google.common.collect.ImmutableList;
+import com.willfp.eco.core.integrations.placeholder.PlaceholderManager;
+import lombok.experimental.UtilityClass;
+import net.md_5.bungee.api.ChatColor;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.awt.Color;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+
+import static net.md_5.bungee.api.ChatColor.COLOR_CHAR;
+
+@UtilityClass
+public class StringUtils {
+    /**
+     * Regexes for gradients.
+     */
+    private static final List<Pattern> GRADIENT_PATTERNS = new ImmutableList.Builder<Pattern>()
+            .add(Pattern.compile("<GRADIENT:([0-9A-Fa-f]{6})>(.*?)</GRADIENT:([0-9A-Fa-f]{6})>"))
+            .add(Pattern.compile("<G:([0-9A-Fa-f]{6})>(.*?)</G:([0-9A-Fa-f]{6})>"))
+            .add(Pattern.compile("<#:([0-9A-Fa-f]{6})>(.*?)</#:([0-9A-Fa-f]{6})>"))
+            .add(Pattern.compile("\\{#:([0-9A-Fa-f]{6})}(.*?)\\{/#:([0-9A-Fa-f]{6})}"))
+            .build();
+
+    /**
+     * Regexes for hex codes.
+     */
+    private static final List<Pattern> HEX_PATTERNS = new ImmutableList.Builder<Pattern>()
+            .add(Pattern.compile("&#" + "([A-Fa-f0-9]{6})" + ""))
+            .add(Pattern.compile("\\{#" + "([A-Fa-f0-9]{6})" + "}"))
+            .add(Pattern.compile("<#" + "([A-Fa-f0-9]{6})" + ">"))
+            .build();
+
+    /**
+     * Translate a string - converts Placeholders and Color codes.
+     *
+     * @param message The message to translate.
+     * @param player  The player to translate placeholders with respect to.
+     * @return The message, translated.
+     */
+    public String translate(@NotNull final String message,
+                            @Nullable final Player player) {
+        String processedMessage = message;
+        processedMessage = translateGradients(processedMessage);
+        processedMessage = PlaceholderManager.translatePlaceholders(processedMessage, player);
+        processedMessage = translateHexColorCodes(processedMessage);
+        processedMessage = ChatColor.translateAlternateColorCodes('&', processedMessage);
+        return processedMessage;
+    }
+
+    /**
+     * Translate a string without respect to a player.
+     *
+     * @param message The message to translate.
+     * @return The message, translated.
+     * @see StringUtils#translate(String, Player)
+     */
+    public String translate(@NotNull final String message) {
+        return translate(message, null);
+    }
+
+    private static String translateHexColorCodes(@NotNull final String message) {
+        String processedMessage = message;
+        for (Pattern pattern : HEX_PATTERNS) {
+            processedMessage = translateHexColorCodes(processedMessage, pattern);
+        }
+        return processedMessage;
+    }
+
+    private static String translateHexColorCodes(@NotNull final String message,
+                                                 @NotNull final Pattern pattern) {
+        Matcher matcher = pattern.matcher(message);
+
+        StringBuffer buffer = new StringBuffer(message.length() + 4 * 8);
+        while (matcher.find()) {
+            String group = matcher.group(1);
+            matcher.appendReplacement(buffer, COLOR_CHAR + "x"
+                    + COLOR_CHAR + group.charAt(0) + COLOR_CHAR + group.charAt(1)
+                    + COLOR_CHAR + group.charAt(2) + COLOR_CHAR + group.charAt(3)
+                    + COLOR_CHAR + group.charAt(4) + COLOR_CHAR + group.charAt(5));
+        }
+
+        return matcher.appendTail(buffer).toString();
+    }
+
+    /**
+     * Colors a string with a gradient.
+     *
+     * @param string The string to color.
+     * @param start  The start color.
+     * @param end    The end color.
+     * @return The string, colored.
+     */
+    private static String processGradients(@NotNull final String string,
+                                           @NotNull final Color start,
+                                           @NotNull final Color end) {
+        String processedString = string;
+        List<ChatColor> modifiers = new ArrayList<>();
+        if (processedString.contains("&l")) {
+            modifiers.add(ChatColor.BOLD);
+        }
+        if (processedString.contains("&o")) {
+            modifiers.add(ChatColor.ITALIC);
+        }
+        if (processedString.contains("&n")) {
+            modifiers.add(ChatColor.UNDERLINE);
+        }
+        if (processedString.contains("&k")) {
+            modifiers.add(ChatColor.MAGIC);
+        }
+        processedString = processedString.replace("&l", "");
+        processedString = processedString.replace("&o", "");
+        processedString = processedString.replace("&n", "");
+        processedString = processedString.replace("&k", "");
+
+        StringBuilder stringBuilder = new StringBuilder();
+        ChatColor[] colors = getGradientColors(start, end, processedString.length());
+        String[] characters = processedString.split("");
+        for (int i = 0; i < processedString.length(); i++) {
+            stringBuilder.append(colors[i]);
+            modifiers.forEach(stringBuilder::append);
+            stringBuilder.append(characters[i]);
+        }
+        return stringBuilder.toString();
+    }
+
+    /**
+     * Creates chatColors for gradients.
+     *
+     * @param start The start color.
+     * @param end   The end color.
+     * @param step  How many colors are returned.
+     * @return Array of chat colors.
+     */
+    private static ChatColor[] getGradientColors(@NotNull final Color start,
+                                                 @NotNull final Color end,
+                                                 final int step) {
+        ChatColor[] colors = new ChatColor[step];
+        int stepR = Math.abs(start.getRed() - end.getRed()) / (step - 1);
+        int stepG = Math.abs(start.getGreen() - end.getGreen()) / (step - 1);
+        int stepB = Math.abs(start.getBlue() - end.getBlue()) / (step - 1);
+        int[] direction = new int[]{
+                start.getRed() < end.getRed() ? +1 : -1,
+                start.getGreen() < end.getGreen() ? +1 : -1,
+                start.getBlue() < end.getBlue() ? +1 : -1
+        };
+
+        for (int i = 0; i < step; i++) {
+            Color color = new Color(start.getRed() + ((stepR * i) * direction[0]), start.getGreen() + ((stepG * i) * direction[1]), start.getBlue() + ((stepB * i) * direction[2]));
+            colors[i] = ChatColor.of(color);
+        }
+        return colors;
+    }
+
+    /**
+     * Add gradients to a string.
+     *
+     * @param string The string.
+     * @return The string, colorized.
+     */
+    private static String translateGradients(@NotNull final String string) {
+        String processedString = string;
+        for (Pattern pattern : GRADIENT_PATTERNS) {
+            Matcher matcher = pattern.matcher(string);
+            while (matcher.find()) {
+                String start = matcher.group(1);
+                String end = matcher.group(3);
+                String content = matcher.group(2);
+                processedString = processedString.replace(matcher.group(), processGradients(content, new Color(Integer.parseInt(start, 16)), new Color(Integer.parseInt(end, 16))));
+            }
+        }
+        return processedString;
+    }
+
+    /**
+     * Internal implementation of {@link String#valueOf}.
+     * Formats collections and doubles better.
+     *
+     * @param object The object to convert to string.
+     * @return The object stringified.
+     */
+    public String internalToString(@Nullable final Object object) {
+        if (object == null) {
+            return "null";
+        }
+
+        if (object instanceof Integer) {
+            return ((Integer) object).toString();
+        } else if (object instanceof String) {
+            return (String) object;
+        } else if (object instanceof Double) {
+            return NumberUtils.format((Double) object);
+        } else if (object instanceof Collection<?>) {
+            Collection<?> c = (Collection<?>) object;
+            return c.stream().map(StringUtils::internalToString).collect(Collectors.joining(", "));
+        } else {
+            return String.valueOf(object);
+        }
+    }
+
+    /**
+     * Remove a string of characters from the start of a string.
+     *
+     * @param string The string to remove the prefix from.
+     * @param prefix The substring to remove.
+     * @return The string with the prefix removed.
+     */
+    public String removePrefix(@NotNull final String string,
+                               @NotNull final String prefix) {
+        if (string.startsWith(prefix)) {
+            return string.substring(prefix.length());
+        }
+        return string;
+    }
+}

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

@@ -2,7 +2,6 @@ package com.willfp.eco.util;
 
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
-import com.willfp.eco.util.optional.Prerequisite;
 import lombok.experimental.UtilityClass;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -45,10 +44,10 @@ public class TeamUtils {
 
         Team team;
 
-        if (!SCOREBOARD.getTeams().stream().map(Team::getName).collect(Collectors.toList()).contains("EE-" + color.name())) {
-            team = SCOREBOARD.registerNewTeam("EE-" + color.name());
+        if (!SCOREBOARD.getTeams().stream().map(Team::getName).collect(Collectors.toList()).contains("EC-" + color.name())) {
+            team = SCOREBOARD.registerNewTeam("EC-" + color.name());
         } else {
-            team = SCOREBOARD.getTeam("EE-" + color.name());
+            team = SCOREBOARD.getTeam("EC-" + color.name());
         }
         assert team != null;
         team.setColor(color);
@@ -80,9 +79,6 @@ public class TeamUtils {
         MATERIAL_COLORS.forcePut(Material.LAPIS_ORE, ChatColor.BLUE);
         MATERIAL_COLORS.forcePut(Material.REDSTONE_ORE, ChatColor.RED);
         MATERIAL_COLORS.forcePut(Material.DIAMOND_ORE, ChatColor.AQUA);
-
-        if (Prerequisite.MINIMUM_1_16.isMet()) {
-            MATERIAL_COLORS.forcePut(Material.ANCIENT_DEBRIS, ChatColor.DARK_RED);
-        }
+        MATERIAL_COLORS.forcePut(Material.ANCIENT_DEBRIS, ChatColor.DARK_RED);
     }
 }

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

@@ -1,5 +1,6 @@
-package com.willfp.eco.util.drops.telekinesis;
+package com.willfp.eco.util;
 
+import lombok.experimental.UtilityClass;
 import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 
@@ -7,20 +8,20 @@ import java.util.HashSet;
 import java.util.Set;
 import java.util.function.Function;
 
-public class EcoTelekinesisTests implements TelekinesisTests {
+@UtilityClass
+public final class TelekinesisUtils {
     /**
      * Set of tests that return if the player is telekinetic.
      */
-    private final Set<Function<Player, Boolean>> tests = new HashSet<>();
+    private static final Set<Function<Player, Boolean>> TESTS = new HashSet<>();
 
     /**
      * Register a new test to check against.
      *
      * @param test The test to register, where the boolean output is if the player is telekinetic.
      */
-    @Override
     public void registerTest(@NotNull final Function<Player, Boolean> test) {
-        tests.add(test);
+        TESTS.add(test);
     }
 
     /**
@@ -31,9 +32,8 @@ public class EcoTelekinesisTests implements TelekinesisTests {
      * @param player The player to test.
      * @return If the player is telekinetic.
      */
-    @Override
     public boolean testPlayer(@NotNull final Player player) {
-        for (Function<Player, Boolean> test : tests) {
+        for (Function<Player, Boolean> test : TESTS) {
             if (test.apply(player)) {
                 return true;
             }

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

@@ -0,0 +1,49 @@
+package com.willfp.eco.util;
+
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang.Validate;
+import org.bukkit.entity.Trident;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.function.Function;
+
+@UtilityClass
+public class TridentUtils {
+    /**
+     * If the meta set function has been set.
+     */
+    private boolean initialized = false;
+
+    /**
+     * The meta set function.
+     */
+    private Function<Trident, ItemStack> tridentFunction = null;
+
+    /**
+     * Get a trident's ItemStack.
+     *
+     * @param trident The trident to query.
+     * @return The trident's ItemStack.
+     */
+    public ItemStack getItemStack(@NotNull final Trident trident) {
+        Validate.isTrue(initialized, "Must be initialized!");
+        Validate.notNull(tridentFunction, "Must be initialized!");
+
+        return tridentFunction.apply(trident);
+    }
+
+    /**
+     * Initialize the trident function.
+     *
+     * @param function The function.
+     */
+    @ApiStatus.Internal
+    public void initialize(@NotNull final Function<Trident, ItemStack> function) {
+        Validate.isTrue(!initialized, "Already initialized!");
+
+        tridentFunction = function;
+        initialized = true;
+    }
+}

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

@@ -6,9 +6,17 @@ import org.bukkit.util.Vector;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 @UtilityClass
 public class VectorUtils {
+    /**
+     * Cached circles to prevent many sqrt calls.
+     */
+    private static final Map<Integer, Vector[]> CIRCLE_CACHE = new HashMap<>();
+
     /**
      * If vector has all components as finite.
      *
@@ -66,7 +74,12 @@ public class VectorUtils {
      * @return An array of {@link Vector}s.
      */
     public Vector[] getCircle(final int radius) {
-        ArrayList<Vector> circleVecs = new ArrayList<>();
+        Vector[] cached = CIRCLE_CACHE.get(radius);
+        if (cached != null) {
+            return cached;
+        }
+
+        List<Vector> vectors = new ArrayList<>();
 
         double xoffset = -radius;
         double zoffset = -radius;
@@ -74,7 +87,7 @@ public class VectorUtils {
         while (zoffset <= radius) {
             while (xoffset <= radius) {
                 if (Math.round(Math.sqrt((xoffset * xoffset) + (zoffset * zoffset))) <= radius) {
-                    circleVecs.add(new Vector(xoffset, 0, zoffset));
+                    vectors.add(new Vector(xoffset, 0, zoffset));
                 } else {
                     xoffset++;
                     continue;
@@ -85,7 +98,9 @@ public class VectorUtils {
             zoffset++;
         }
 
-        return circleVecs.toArray(new Vector[0]);
+        Vector[] result = vectors.toArray(new Vector[0]);
+        CIRCLE_CACHE.put(radius, result);
+        return result;
     }
 
     /**
@@ -95,21 +110,21 @@ public class VectorUtils {
      * @return An array of {@link Vector}s.
      */
     public Vector[] getSquare(final int radius) {
-        ArrayList<Vector> circleVecs = new ArrayList<>();
+        List<Vector> vectors = new ArrayList<>();
 
         int xoffset = -radius;
         int zoffset = -radius;
 
         while (zoffset <= radius) {
             while (xoffset <= radius) {
-                circleVecs.add(new Vector(xoffset, 0, zoffset));
+                vectors.add(new Vector(xoffset, 0, zoffset));
                 xoffset++;
             }
             xoffset = -radius;
             zoffset++;
         }
 
-        return circleVecs.toArray(new Vector[0]);
+        return vectors.toArray(new Vector[0]);
     }
 
     /**
@@ -119,16 +134,16 @@ public class VectorUtils {
      * @return An array of {@link Vector}s.
      */
     public Vector[] getCube(final int radius) {
-        ArrayList<Vector> cubeVecs = new ArrayList<>();
+        List<Vector> vectors = new ArrayList<>();
 
         for (int y = -radius; y <= radius; y++) {
             for (int z = -radius; z <= radius; z++) {
                 for (int x = -radius; x <= radius; x++) {
-                    cubeVecs.add(new Vector(x, y, z));
+                    vectors.add(new Vector(x, y, z));
                 }
             }
         }
 
-        return cubeVecs.toArray(new Vector[0]);
+        return vectors.toArray(new Vector[0]);
     }
 }

eco-core/build.gradle

@@ -0,0 +1,8 @@
+group 'com.willfp'
+version rootProject.version
+
+subprojects {
+    dependencies {
+        compileOnly project(":eco-api")
+    }
+}

eco-core/core-nms/build.gradle

@@ -0,0 +1,9 @@
+group 'com.willfp'
+version rootProject.version
+
+subprojects {
+    dependencies {
+        compileOnly project(':eco-core:core-proxy')
+        compileOnly project(':eco-core:core-plugin')
+    }
+}

eco-core/core-nms/v1_16_R1/build.gradle

@@ -0,0 +1,6 @@
+group 'com.willfp'
+version rootProject.version
+
+dependencies {
+    compileOnly 'org.spigotmc:spigot:1.16.1-R0.1-SNAPSHOT'
+}

eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/eco/proxy/v1_16_R1/AutoCraft.java

@@ -0,0 +1,19 @@
+package com.willfp.eco.proxy.v1_16_R1;
+
+import com.willfp.eco.proxy.proxies.AutoCraftProxy;
+import net.minecraft.server.v1_16_R1.MinecraftKey;
+import net.minecraft.server.v1_16_R1.PacketPlayOutAutoRecipe;
+import org.jetbrains.annotations.NotNull;
+
+import java.lang.reflect.Field;
+
+public final class AutoCraft implements AutoCraftProxy {
+    @Override
+    public void modifyPacket(@NotNull final Object packet) throws NoSuchFieldException, IllegalAccessException {
+        PacketPlayOutAutoRecipe recipePacket = (PacketPlayOutAutoRecipe) packet;
+        Field fKey = recipePacket.getClass().getDeclaredField("b");
+        fKey.setAccessible(true);
+        MinecraftKey key = (MinecraftKey) fKey.get(recipePacket);
+        fKey.set(recipePacket, new MinecraftKey(key.getNamespace(), key.getKey() + "_displayed"));
+    }
+}

eco-core/core-nms/v1_16_R1/src/main/java/com/willfp/eco/proxy/v1_16_R1/BlockBreak.java

@@ -0,0 +1,16 @@
+package com.willfp.eco.proxy.v1_16_R1;
+
+import com.willfp.eco.proxy.proxies.BlockBreakProxy;
+import net.minecraft.server.v1_16_R1.BlockPosition;
+import org.bukkit.block.Block;
+import org.bukkit.craftbukkit.v1_16_R1.entity.CraftPlayer;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+public final class BlockBreak implements BlockBreakProxy {
+    @Override
+    public void breakBlock(@NotNull final Player player,
+                           @NotNull final Block block) {
+        ((CraftPlayer) player).getHandle().playerInteractManager.breakBlock(new BlockPosition(block.getX(), block.getY(), block.getZ()));
+    }
+}