Merge remote-tracking branch 'origin/master'

# Conflicts:
#	eco-api/src/main/java/com/willfp/eco/internal/arrows/ArrowDataListener.java
#	eco-api/src/main/java/com/willfp/eco/internal/items/AbstractItemStackBuilder.java
#	eco-api/src/main/java/com/willfp/eco/util/TeamUtils.java

build.gradle

@@ -76,6 +76,7 @@ allprojects {
     shadowJar {
         relocate('org.bstats.bukkit', 'com.willfp.eco.shaded.bstats')
         relocate('org.apache.maven', 'com.willfp.eco.shaded.maven')
+        relocate('com.google.gson', 'com.willfp.eco.shaded.gson')
     }
 
     jar {
@@ -86,6 +87,11 @@ allprojects {
         onlyIf { !sourceSets.main.allSource.files.isEmpty() }
     }
 
+    java {
+        sourceCompatibility = JavaVersion.VERSION_16
+        targetCompatibility = JavaVersion.VERSION_16
+    }
+
     compileJava.options.encoding = 'UTF-8'
     compileJava.dependsOn clean
 
@@ -95,4 +101,3 @@ allprojects {
 group = 'com.willfp'
 archivesBaseName = project.name
 version = findProperty("version")
-java.sourceCompatibility = JavaVersion.VERSION_16

eco-api/build.gradle

@@ -1,15 +1,29 @@
+plugins {
+    id 'com.github.johnrengelman.shadow'
+}
+
 group 'com.willfp'
 version rootProject.version
 
 dependencies {
-    compileOnly 'org.spigotmc:spigot:1.16.4-R0.1-SNAPSHOT'
+    compileOnly 'org.spigotmc:spigot:1.17-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'
+    compileOnly 'com.google.code.gson:gson:2.8.7'
 }
 
 compileJava.options.encoding = 'UTF-8'
 compileJava.dependsOn clean
 
 build.dependsOn publishToMavenLocal
+
+publishing {
+    publications {
+        shadow(MavenPublication) {
+            from components.java
+            artifactId 'eco'
+        }
+    }
+}

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

@@ -272,6 +272,7 @@ public abstract class EcoPlugin extends JavaPlugin {
 
         this.getEventManager().unregisterAllListeners();
         this.getScheduler().cancelAll();
+        this.getConfigHandler().saveAllConfigs();
 
         this.disable();
     }

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

@@ -25,13 +25,22 @@ public class Prerequisite {
     );
 
     /**
-     * Requires the server to be running 1.17
+     * Requires the server to be running 1.17.
      */
+    @Deprecated
     public static final Prerequisite v1_17 = new Prerequisite(
             () -> ProxyConstants.NMS_VERSION.contains("17"),
             "Requires server to be running 1.17+"
     );
 
+    /**
+     * Requires the server to be running 1.17.
+     */
+    public static final Prerequisite HAS_1_17 = new Prerequisite(
+            () -> ProxyConstants.NMS_VERSION.contains("17"),
+            "Requires server to be running 1.17+"
+    );
+
     /**
      * If the necessary prerequisite condition has been met.
      */

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

@@ -1,6 +1,6 @@
 package com.willfp.eco.core.config;
 
-import com.willfp.eco.internal.config.UpdatableYamlConfig;
+import com.willfp.eco.internal.config.yaml.UpdatableYamlConfig;
 import com.willfp.eco.core.EcoPlugin;
 import org.jetbrains.annotations.NotNull;
 

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

@@ -11,6 +11,13 @@ public interface Config {
      */
     void clearCache();
 
+    /**
+     * Convert the config into readable text.
+     *
+     * @return The plaintext.
+     */
+    String toPlaintext();
+
     /**
      * Get if the config contains a key.
      *

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

@@ -1,6 +1,6 @@
 package com.willfp.eco.core.config;
 
-import com.willfp.eco.internal.config.UpdatableYamlConfig;
+import com.willfp.eco.internal.config.yaml.UpdatableYamlConfig;
 import com.willfp.eco.core.EcoPlugin;
 import org.jetbrains.annotations.NotNull;
 

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

@@ -0,0 +1,26 @@
+package com.willfp.eco.core.config;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+
+public interface JSONConfig extends Config {
+    /**
+     * Get a list of subsections from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or a blank {@link java.util.ArrayList} if not found.
+     */
+    @NotNull
+    List<JSONConfig> getSubsections(@NotNull String path);
+
+    /**
+     * Get a list of subsections from config.
+     *
+     * @param path The key to fetch the value from.
+     * @return The found value, or null if not found.
+     */
+    @Nullable
+    List<JSONConfig> getSubsectionsOrNull(@NotNull String path);
+}

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

@@ -0,0 +1,20 @@
+package com.willfp.eco.core.config;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.config.json.LoadableJsonConfig;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class JsonStaticBaseConfig extends LoadableJsonConfig {
+    /**
+     * Config implementation for configs present in the plugin's base directory (eg config.json, lang.json).
+     * <p>
+     * Does not automatically update.
+     *
+     * @param configName The name of the config
+     * @param plugin     The plugin.
+     */
+    protected JsonStaticBaseConfig(@NotNull final String configName,
+                                   @NotNull final EcoPlugin plugin) {
+        super(configName, plugin, "", plugin.getClass());
+    }
+}

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

@@ -1,6 +1,6 @@
 package com.willfp.eco.core.config;
 
-import com.willfp.eco.internal.config.LoadableYamlConfig;
+import com.willfp.eco.internal.config.yaml.LoadableYamlConfig;
 import com.willfp.eco.core.EcoPlugin;
 import org.jetbrains.annotations.NotNull;
 

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

@@ -1,10 +1,10 @@
 package com.willfp.eco.core.config;
 
-import com.willfp.eco.internal.config.ConfigWrapper;
+import com.willfp.eco.internal.config.yaml.YamlConfigWrapper;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.jetbrains.annotations.NotNull;
 
-public abstract class YamlConfig extends ConfigWrapper<YamlConfiguration> {
+public abstract class YamlConfig extends YamlConfigWrapper<YamlConfiguration> {
     /**
      * Config implementation for passing YamlConfigurations.
      * <p>

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

@@ -1,12 +1,13 @@
 package com.willfp.eco.core.data;
 
-import com.willfp.eco.core.config.BaseConfig;
+import com.willfp.eco.core.EcoPlugin;
 import com.willfp.eco.core.config.Config;
-import com.willfp.eco.internal.config.ConfigSection;
+import com.willfp.eco.core.config.JSONConfig;
+import com.willfp.eco.core.config.JsonStaticBaseConfig;
+import com.willfp.eco.internal.config.LoadableConfig;
+import com.willfp.eco.internal.config.json.JSONConfigSection;
 import lombok.experimental.UtilityClass;
-import org.bukkit.NamespacedKey;
 import org.bukkit.OfflinePlayer;
-import org.bukkit.configuration.file.YamlConfiguration;
 import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 
@@ -20,93 +21,21 @@ public class Data {
     /**
      * Instance of eco data.yml.
      */
-    private static BaseConfig dataYml = null;
+    private static JSONConfig datafile = null;
 
     /**
      * All cached player data.
      */
-    private static final Map<UUID, Config> PLAYER_DATA = new HashMap<>();
+    private static final Map<UUID, Map<EcoPlugin, JSONConfig>> PLAYER_DATA = new HashMap<>();
 
     /**
-     * Write an integer to a player's data.
+     * Initialize the player data with an instance of data.json.
      *
-     * @param player The player.
+     * @param config data.json.
-     * @param key    The key.
-     * @param data   The data.
-     */
-    public void writeInt(@NotNull final OfflinePlayer player,
-                         @NotNull final NamespacedKey key,
-                         final int data) {
-        getPlayerConfig(player).set(key.toString(), data);
-    }
-
-    /**
-     * Write a string to a player's data.
-     *
-     * @param player The player.
-     * @param key    The key.
-     * @param data   The data.
-     */
-    public void writeString(@NotNull final OfflinePlayer player,
-                            @NotNull final NamespacedKey key,
-                            @NotNull final String data) {
-        getPlayerConfig(player).set(key.toString(), data);
-    }
-
-    /**
-     * Write a double to a player's data.
-     *
-     * @param player The player.
-     * @param key    The key.
-     * @param data   The data.
-     */
-    public void writeDouble(@NotNull final OfflinePlayer player,
-                            @NotNull final NamespacedKey key,
-                            final double data) {
-        getPlayerConfig(player).set(key.toString(), data);
-    }
-
-    /**
-     * Read an integer from a player's data.
-     *
-     * @param player The player.
-     * @param key    The key.
-     */
-    public int readInt(@NotNull final OfflinePlayer player,
-                       @NotNull final NamespacedKey key) {
-        return getPlayerConfig(player).getInt(key.toString());
-    }
-
-    /**
-     * Read a string from a player's data.
-     *
-     * @param player The player.
-     * @param key    The key.
-     */
-    public String readString(@NotNull final OfflinePlayer player,
-                             @NotNull final NamespacedKey key) {
-        return getPlayerConfig(player).getString(key.toString());
-    }
-
-    /**
-     * Read a double from a player's data.
-     *
-     * @param player The player.
-     * @param key    The key.
-     */
-    public double readDouble(@NotNull final OfflinePlayer player,
-                             @NotNull final NamespacedKey key) {
-        return getPlayerConfig(player).getDouble(key.toString());
-    }
-
-    /**
-     * Initialize the player data with an instance of data.yml.
-     *
-     * @param config data.yml.
      */
     @ApiStatus.Internal
-    public void init(@NotNull final BaseConfig config) {
+    public void init(@NotNull final JsonStaticBaseConfig config) {
-        dataYml = config;
+        datafile = config;
     }
 
     /**
@@ -116,25 +45,39 @@ public class Data {
      * @throws IOException Error during saving.
      */
     @ApiStatus.Internal
-    public void save(@NotNull final BaseConfig config) throws IOException {
+    public void save(@NotNull final Config config) throws IOException {
-        for (Map.Entry<UUID, Config> entry : PLAYER_DATA.entrySet()) {
+        for (Map.Entry<UUID, Map<EcoPlugin, JSONConfig>> entry : PLAYER_DATA.entrySet()) {
-            for (String key : entry.getValue().getKeys(false)) {
+            entry.getValue().forEach((plugin, jsonConfig) -> {
-                config.set("player-data." + entry.getKey().toString() + "." + key, entry.getValue().get(key));
+                for (String key : jsonConfig.getKeys(false)) {
+                    config.set("player-data." + plugin.getName().toLowerCase() + "." + entry.getKey().toString() + "." + key, jsonConfig);
                 }
+            });
         }
-        config.save();
+        ((LoadableConfig) config).save();
     }
 
-    private Config getPlayerConfig(@NotNull final OfflinePlayer player) {
+    /**
-        Config config = PLAYER_DATA.get(player.getUniqueId());
+     * Get the data for a player.
+     *
+     * @param player The player.
+     * @param plugin The plugin.
+     * @return The data.
+     */
+    public JSONConfig getData(@NotNull final OfflinePlayer player,
+                              @NotNull final EcoPlugin plugin) {
+        if (!PLAYER_DATA.containsKey(player.getUniqueId())) {
+            PLAYER_DATA.put(player.getUniqueId(), new HashMap<>());
+        }
+
+        JSONConfig config = PLAYER_DATA.get(player.getUniqueId()).get(plugin);
 
         if (config == null) {
-            config = dataYml.getSubsectionOrNull("player-data." + player.getUniqueId());
+            config = (JSONConfig) datafile.getSubsectionOrNull("player-data." + plugin.getName().toLowerCase() + "." + player.getUniqueId());
             if (config == null) {
-                config = new ConfigSection(new YamlConfiguration());
+                config = new JSONConfigSection(new HashMap<>());
             }
-            PLAYER_DATA.put(player.getUniqueId(), config);
+            PLAYER_DATA.get(player.getUniqueId()).put(plugin, config);
-            return getPlayerConfig(player);
+            return getData(player, plugin);
         }
 
         return config;

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

@@ -0,0 +1,40 @@
+package com.willfp.eco.core.events;
+
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class PlayerJumpEvent extends PlayerMoveEvent {
+    /**
+     * Internal bukkit.
+     */
+    private static final HandlerList HANDLERS = new HandlerList();
+
+    /**
+     * Create a new PlayerJumpEvent.
+     *
+     * @param event The PlayerMoveEvent.
+     */
+    public PlayerJumpEvent(@NotNull final PlayerMoveEvent event) {
+        super(event.getPlayer(), event.getFrom(), event.getTo());
+    }
+
+    /**
+     * Internal bukkit.
+     *
+     * @return The handlers.
+     */
+    @Override
+    public @NotNull HandlerList getHandlers() {
+        return HANDLERS;
+    }
+
+    /**
+     * Internal bukkit.
+     *
+     * @return The handlers.
+     */
+    public static @NotNull HandlerList getHandlerList() {
+        return HANDLERS;
+    }
+}

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

@@ -4,5 +4,11 @@ import org.bukkit.metadata.FixedMetadataValue;
 import org.jetbrains.annotations.NotNull;
 
 public interface MetadataValueFactory {
+    /**
+     * Create a metadata value for a given plugin and object.
+     *
+     * @param value The object to store in metadata.
+     * @return The metadata value.
+     */
     FixedMetadataValue create(@NotNull Object value);
 }

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

@@ -1,20 +1,29 @@
 package com.willfp.eco.core.gui.menu;
 
 import com.willfp.eco.core.gui.slot.Slot;
+import com.willfp.eco.core.items.builder.ItemStackBuilder;
 import com.willfp.eco.internal.gui.FillerSlot;
 import com.willfp.eco.util.ListUtils;
 import lombok.Getter;
 import org.bukkit.Material;
 import org.bukkit.inventory.ItemStack;
-import org.bukkit.inventory.meta.ItemMeta;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
 public class FillerMask {
+    /**
+     * Mask.
+     */
     @Getter
     private final List<List<Slot>> mask;
 
+    /**
+     * Create a new filler mask.
+     *
+     * @param material The mask material.
+     * @param pattern  The pattern.
+     */
     public FillerMask(@NotNull final Material material,
                       @NotNull final String... pattern) {
         if (material == Material.AIR) {
@@ -23,11 +32,9 @@ public class FillerMask {
 
         mask = ListUtils.create2DList(6, 9);
 
-        ItemStack itemStack = new ItemStack(material);
+        ItemStack itemStack = new ItemStackBuilder(material)
-        ItemMeta meta = itemStack.getItemMeta();
+                .setDisplayName("&r")
-        assert meta != null;
+                .build();
-        meta.setDisplayName("§r");
-        itemStack.setItemMeta(meta);
 
         int row = 0;
 

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

@@ -16,24 +16,72 @@ import java.util.List;
 import java.util.function.Consumer;
 
 public interface Menu {
+    /**
+     * Get the amount of rows.
+     *
+     * @return
+     */
     int getRows();
 
+    /**
+     * Get slot at given row and column.
+     *
+     * @param row    The row.
+     * @param column The column.
+     * @return The row.
+     */
     Slot getSlot(int row,
                  int column);
 
+    /**
+     * Get the menu title.
+     *
+     * @return The title.
+     */
     String getTitle();
 
+    /**
+     * Open the inventory for the player.
+     *
+     * @param player The player.
+     * @return The inventory.
+     */
     Inventory open(@NotNull Player player);
 
+    /**
+     * Create a builder with a given amount of rows.
+     *
+     * @param rows The rows.
+     * @return The builder.
+     */
     static Builder builder(final int rows) {
         return new Builder(rows);
     }
 
     class Builder {
+        /**
+         * The amount of rows.
+         */
         private final int rows;
+
+        /**
+         * The title.
+         */
         private String title = "Menu";
+
+        /**
+         * The mask slots.
+         */
         private List<List<Slot>> maskSlots;
+
+        /**
+         * The slots.
+         */
         private final List<List<Slot>> slots;
+
+        /**
+         * The close event handler.
+         */
         private Consumer<InventoryCloseEvent> onClose = (event) -> {
         };
 

eco-api/src/main/java/com/willfp/eco/core/gui/slot/Slot.java

@@ -1,34 +1,76 @@
 package com.willfp.eco.core.gui.slot;
 
 import com.willfp.eco.internal.gui.EcoSlot;
+import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.function.BiConsumer;
+import java.util.function.Function;
 
 public interface Slot {
-    ItemStack getItemStack();
+    /**
+     * Get the ItemStack that would be shown to a player.
+     *
+     * @param player The player.
+     * @return The ItemStack.
+     */
+    ItemStack getItemStack(@NotNull Player player);
 
+    /**
+     * Create a builder for an ItemStack.
+     *
+     * @param itemStack The ItemStack.
+     * @return The builder.
+     */
     static Builder builder(@NotNull final ItemStack itemStack) {
-        return new Builder(itemStack);
+        return new Builder((player) -> itemStack);
+    }
+
+    /**
+     * Create a builder for a player-specific ItemStack.
+     *
+     * @param provider The provider.
+     * @return The builder.
+     */
+    static Builder builder(@NotNull final Function<Player, ItemStack> provider) {
+        return new Builder(provider);
     }
 
     class Builder {
-        private final ItemStack itemStack;
+        /**
+         * Provider.
+         */
+        private final Function<Player, ItemStack> provider;
 
+        /**
+         * Left click handler.
+         */
         private BiConsumer<InventoryClickEvent, Slot> onLeftClick = null;
 
+        /**
+         * Right click handler.
+         */
         private BiConsumer<InventoryClickEvent, Slot> onRightClick = null;
 
+        /**
+         * Shift-Left-Click handler.
+         */
         private BiConsumer<InventoryClickEvent, Slot> onShiftLeftClick = null;
 
+        /**
+         * Shift-Right-Click handler.
+         */
         private BiConsumer<InventoryClickEvent, Slot> onShiftRightClick = null;
 
+        /**
+         * Middle click handler.
+         */
         private BiConsumer<InventoryClickEvent, Slot> onMiddleClick = null;
 
-        Builder(@NotNull final ItemStack itemStack) {
+        Builder(@NotNull final Function<Player, ItemStack> provider) {
-            this.itemStack = itemStack;
+            this.provider = provider;
         }
 
         public Builder onLeftClick(@NotNull final BiConsumer<InventoryClickEvent, Slot> action) {
@@ -57,7 +99,7 @@ public interface Slot {
         }
 
         public Slot build() {
-            return new EcoSlot(itemStack, onLeftClick, onRightClick, onShiftLeftClick, onShiftRightClick, onMiddleClick);
+            return new EcoSlot(provider, onLeftClick, onRightClick, onShiftLeftClick, onShiftRightClick, onMiddleClick);
         }
     }
 }

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

@@ -52,7 +52,7 @@ public class PlaceholderManager {
     public static String getResult(@Nullable final Player player,
                                    @NotNull final String identifier) {
         Optional<PlaceholderEntry> matching = REGISTERED_PLACEHOLDERS.stream().filter(expansion -> expansion.getIdentifier().equalsIgnoreCase(identifier)).findFirst();
-        if (!matching.isPresent()) {
+        if (matching.isEmpty()) {
             return null;
         }
         PlaceholderEntry entry = matching.get();

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

@@ -2,6 +2,7 @@ package com.willfp.eco.core.items;
 
 import com.willfp.eco.core.recipe.parts.EmptyTestableItem;
 import com.willfp.eco.core.recipe.parts.MaterialTestableItem;
+import com.willfp.eco.core.recipe.parts.TestableStack;
 import lombok.experimental.UtilityClass;
 import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
@@ -40,6 +41,7 @@ public final class Items {
      */
     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) {
@@ -48,8 +50,26 @@ public final class Items {
             return new MaterialTestableItem(material);
         }
 
+        if (split.length == 2) {
             CustomItem part = REGISTRY.get(new NamespacedKey(split[0], split[1]));
-        return part == null ? new EmptyTestableItem() : part;
+
+            if (part == null) {
+                Material material = Material.getMaterial(split[0].toUpperCase());
+                if (material == null || material == Material.AIR) {
+                    return new EmptyTestableItem();
+                }
+                return new TestableStack(new MaterialTestableItem(material), Integer.parseInt(split[1]));
+            } else {
+                return part;
+            }
+        }
+
+        if (split.length == 3) {
+            CustomItem part = REGISTRY.get(new NamespacedKey(split[0], split[1]));
+            return part == null ? new EmptyTestableItem() : new TestableStack(part, Integer.parseInt(split[2]));
+        }
+
+        return new EmptyTestableItem();
     }
 
     /**

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

@@ -0,0 +1,29 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import org.bukkit.Material;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.inventory.meta.EnchantmentStorageMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class EnchantedBookBuilder extends AbstractItemStackBuilder<EnchantmentStorageMeta, EnchantedBookBuilder> {
+    /**
+     * Create a new EnchantedBookBuilder.
+     */
+    public EnchantedBookBuilder() {
+        super(Material.ENCHANTED_BOOK);
+    }
+
+    /**
+     * Add an enchantment to the item.
+     *
+     * @param enchantment The enchantment.
+     * @param level       The level.
+     * @return The builder.
+     */
+    public EnchantedBookBuilder addStoredEnchantment(@NotNull final Enchantment enchantment,
+                                                     final int level) {
+        this.getMeta().addStoredEnchant(enchantment, level, true);
+        return this;
+    }
+}

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

@@ -0,0 +1,181 @@
+package com.willfp.eco.core.items.builder;
+
+import org.bukkit.NamespacedKey;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.inventory.ItemFlag;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.function.Supplier;
+
+public interface ItemBuilder {
+    /**
+     * Set the ItemStack amount.
+     *
+     * @param amount The amount.
+     * @return The builder.
+     */
+    ItemBuilder setAmount(int amount);
+
+    /**
+     * Set the ItemStack amount.
+     *
+     * @param amount The amount.
+     * @return The builder.
+     */
+    ItemBuilder setAmount(@NotNull Supplier<Integer> amount);
+
+    /**
+     * Add an enchantment to the item.
+     *
+     * @param enchantment The enchantment.
+     * @param level       The level.
+     * @return The builder.r
+     */
+    ItemBuilder addEnchantment(@NotNull Enchantment enchantment,
+                     int level);
+
+    /**
+     * Add an enchantment to the item.
+     *
+     * @param enchantment The enchantment.
+     * @param level       The level.
+     * @return The builder.
+     */
+    ItemBuilder addEnchantment(@NotNull Supplier<Enchantment> enchantment,
+                     @NotNull Supplier<Integer> level);
+
+    /**
+     * Set the item display name.
+     *
+     * @param name The name.
+     * @return The builder.
+     */
+    ItemBuilder setDisplayName(@NotNull String name);
+
+    /**
+     * Set the item display name.
+     *
+     * @param name The name.
+     * @return The builder.
+     */
+    ItemBuilder setDisplayName(@NotNull Supplier<String> name);
+
+    /**
+     * Add lore line.
+     *
+     * @param line The line.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLine(@NotNull String line);
+
+    /**
+     * Add lore line.
+     *
+     * @param line The line.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLine(@NotNull Supplier<String> line);
+
+    /**
+     * Add lore lines.
+     *
+     * @param lines The lines.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLines(@NotNull List<String> lines);
+
+    /**
+     * Add lore lines.
+     *
+     * @param lines The lines.
+     * @return The builder.
+     */
+    ItemBuilder addLoreLines(@NotNull Supplier<List<String>> lines);
+
+    /**
+     * Add ItemFlags.
+     *
+     * @param itemFlags The flags.
+     * @return The builder.
+     */
+    ItemBuilder addItemFlag(@NotNull ItemFlag... itemFlags);
+
+    /**
+     * Add ItemFlags.
+     *
+     * @param itemFlags The flags.
+     * @return The builder.
+     */
+    ItemBuilder addItemFlag(@NotNull Supplier<ItemFlag[]> itemFlags);
+
+    /**
+     * Write meta key.
+     *
+     * @param key   The key.
+     * @param type  The type.
+     * @param value The value.
+     * @param <A>   The type.
+     * @param <B>   The type.
+     * @return The builder.
+     */
+    <A, B> ItemBuilder writeMetaKey(@NotNull NamespacedKey key,
+                          @NotNull PersistentDataType<A, B> type,
+                          @NotNull B value);
+
+    /**
+     * Write meta key.
+     *
+     * @param key   The key.
+     * @param type  The type.
+     * @param value The value.
+     * @param <A>   The type.
+     * @param <B>   The type.
+     * @return The builder.
+     */
+    <A, B> ItemBuilder writeMetaKey(@NotNull Supplier<NamespacedKey> key,
+                          @NotNull Supplier<PersistentDataType<A, B>> type,
+                          @NotNull Supplier<B> value);
+
+    /**
+     * Set unbreakable.
+     *
+     * @param unbreakable If the item should be unbreakable.
+     * @return The builder.
+     */
+    ItemBuilder setUnbreakable(boolean unbreakable);
+
+    /**
+     * Set unbreakable.
+     *
+     * @param unbreakable If the item should be unbreakable.
+     * @return The builder.
+     */
+    ItemBuilder setUnbreakable(@NotNull Supplier<Boolean> unbreakable);
+
+    /**
+     * Set custom model data.
+     *
+     * @param data The data.
+     * @return The builder.
+     */
+    ItemBuilder setCustomModelData(@Nullable Integer data);
+
+    /**
+     * Set custom model data.
+     *
+     * @param data The data.
+     * @return The builder.
+     */
+    ItemBuilder setCustomModelData(@NotNull Supplier<Integer> data);
+
+    /**
+     * Build the item.
+     *
+     * @return The item.
+     */
+    ItemStack build();
+}

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

@@ -0,0 +1,27 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class ItemStackBuilder extends AbstractItemStackBuilder<ItemMeta, ItemStackBuilder> {
+    /**
+     * Create a new ItemStackBuilder.
+     *
+     * @param material The material.
+     */
+    public ItemStackBuilder(@NotNull final Material material) {
+        super(material);
+    }
+
+    /**
+     * Create a new ItemStackBuilder to modify an existing item.
+     *
+     * @param base The ItemStack to start with.
+     */
+    public ItemStackBuilder(@NotNull final ItemStack base) {
+        super(base);
+    }
+}

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

@@ -0,0 +1,41 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import org.bukkit.Color;
+import org.bukkit.Material;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.LeatherArmorMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class LeatherArmorBuilder extends AbstractItemStackBuilder<LeatherArmorMeta, LeatherArmorBuilder> {
+    /**
+     * Create a new ItemStackBuilder.
+     *
+     * @param material The material.
+     */
+    public LeatherArmorBuilder(@NotNull final Material material) {
+        super(material);
+    }
+
+    /**
+     * Create a new ItemStackBuilder to modify an existing item.
+     *
+     * @param base The ItemStack to start with.
+     */
+    public LeatherArmorBuilder(@NotNull final ItemStack base) {
+        super(base);
+    }
+
+    /**
+     * Set leather color.
+     *
+     * @param color The color.
+     * @return The builder.
+     */
+    public LeatherArmorBuilder setColor(@NotNull final java.awt.Color color) {
+        Color bukkitColor = Color.fromRGB(color.getRed(), color.getGreen(), color.getBlue());
+        this.getMeta().setColor(bukkitColor);
+
+        return this;
+    }
+}

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

@@ -0,0 +1,28 @@
+package com.willfp.eco.core.items.builder;
+
+import com.willfp.eco.internal.items.AbstractItemStackBuilder;
+import com.willfp.eco.util.SkullUtils;
+import org.bukkit.Material;
+import org.bukkit.inventory.meta.SkullMeta;
+import org.jetbrains.annotations.NotNull;
+
+public class SkullBuilder extends AbstractItemStackBuilder<SkullMeta, SkullBuilder> {
+    /**
+     * Create a new EnchantedBookBuilder.
+     */
+    public SkullBuilder() {
+        super(Material.PLAYER_HEAD);
+    }
+
+    /**
+     * Set skull texture.
+     *
+     * @param texture The texture.
+     * @return The builder.
+     */
+    public SkullBuilder setSkullTexture(@NotNull final String texture) {
+        SkullUtils.setSkullTexture(this.getMeta(), texture);
+
+        return this;
+    }
+}

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

@@ -2,13 +2,18 @@ package com.willfp.eco.core.recipe;
 
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.items.Items;
 import com.willfp.eco.core.recipe.recipes.CraftingRecipe;
+import com.willfp.eco.core.recipe.recipes.ShapedCraftingRecipe;
 import lombok.experimental.UtilityClass;
 import org.bukkit.NamespacedKey;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.util.List;
+
 @UtilityClass
 @SuppressWarnings("deprecation")
 public class Recipes {
@@ -59,4 +64,29 @@ public class Recipes {
 
         return null;
     }
+
+    /**
+     * Create and register recipe.
+     *
+     * @param plugin        The plugin.
+     * @param key           The key.
+     * @param output        The output.
+     * @param recipeStrings The recipe.
+     * @return The recipe.
+     */
+    public CraftingRecipe createAndRegisterRecipe(@NotNull final EcoPlugin plugin,
+                                                  @NotNull final String key,
+                                                  @NotNull final ItemStack output,
+                                                  @NotNull final List<String> recipeStrings) {
+        ShapedCraftingRecipe.Builder builder = ShapedCraftingRecipe.builder(plugin, key).setOutput(output);
+
+        for (int i = 0; i < 9; i++) {
+            builder.setRecipePart(i, Items.lookup(recipeStrings.get(i)));
+        }
+
+        ShapedCraftingRecipe recipe = builder.build();
+        recipe.register();
+
+        return recipe;
+    }
 }

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

@@ -0,0 +1,70 @@
+package com.willfp.eco.core.recipe.parts;
+
+import com.willfp.eco.core.items.TestableItem;
+import com.willfp.eco.internal.InternalInterfacing;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class TestableStack implements TestableItem {
+    /**
+     * The item.
+     */
+    private final TestableItem handle;
+
+    /**
+     * The amount.
+     */
+    @Getter
+    private final int amount;
+
+    /**
+     * Create a new testable stack.
+     *
+     * @param item   The item.
+     * @param amount The amount.
+     */
+    public TestableStack(@NotNull final TestableItem item,
+                         final int amount) {
+        Validate.isTrue(!(item instanceof TestableStack));
+
+        this.handle = item;
+        this.amount = amount;
+    }
+
+    /**
+     * 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 && handle.matches(itemStack) && itemStack.getAmount() >= amount;
+    }
+
+    @Override
+    public ItemStack getItem() {
+        ItemStack temp = handle.getItem().clone();
+        ItemMeta meta = temp.getItemMeta();
+        assert meta != null;
+
+        List<String> lore = meta.hasLore() ? meta.getLore() : new ArrayList<>();
+        assert lore != null;
+        lore.add("");
+        String add = InternalInterfacing.getInstance().getLang().getString("multiple-in-craft");
+        add = add.replace("%amount%", String.valueOf(amount));
+        lore.add(add);
+        meta.setLore(lore);
+        temp.setItemMeta(meta);
+        temp.setAmount(amount);
+
+        return temp;
+    }
+}

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

@@ -0,0 +1,69 @@
+package com.willfp.eco.core.web;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class Paste {
+    /**
+     * The contents.
+     */
+    private final String contents;
+
+    /**
+     * Create a new paste.
+     *
+     * @param contents The contents.
+     */
+    public Paste(@NotNull final String contents) {
+        this.contents = contents;
+    }
+
+    /**
+     * Upload to hastebin and get a token.
+     *
+     * @return The token.
+     */
+    public String getHastebinToken() {
+        try {
+            String urly = "https://hastebin.com/documents";
+            URL obj = new URL(urly);
+            HttpURLConnection con = (HttpURLConnection) obj.openConnection();
+
+            con.setRequestMethod("POST");
+            con.setRequestProperty("Content-Type", "application/json");
+
+            con.setDoOutput(true);
+            DataOutputStream wr = new DataOutputStream(con.getOutputStream());
+            wr.writeBytes(contents);
+            wr.flush();
+            wr.close();
+
+            BufferedReader iny = new BufferedReader(
+                    new InputStreamReader(con.getInputStream()));
+            String output;
+            StringBuilder responseBuilder = new StringBuilder();
+
+            while ((output = iny.readLine()) != null) {
+                responseBuilder.append(output);
+            }
+            iny.close();
+
+            String responseString = responseBuilder.toString();
+
+            responseString = responseString.replace("{\"key\":\"", "");
+            responseString = responseString.replace("\"}", "");
+
+            return responseString;
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        return "";
+    }
+}

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

@@ -0,0 +1,18 @@
+package com.willfp.eco.internal;
+
+import com.willfp.eco.core.config.base.LangYml;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class InternalInterfacing {
+    private static InternalInterfacing interfacing;
+
+    public static void setInterfacing(@NotNull final InternalInterfacing interfacing) {
+        InternalInterfacing.interfacing = interfacing;
+    }
+
+    public abstract LangYml getLang();
+
+    public static InternalInterfacing getInstance() {
+        return interfacing;
+    }
+}

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

@@ -31,14 +31,13 @@ public class ArrowDataListener extends PluginDependent implements Listener {
      */
     @EventHandler(priority = EventPriority.LOWEST)
     public void onLaunch(final ProjectileLaunchEvent event) {
-        if (!(event.getEntity() instanceof Arrow)) {
+        if (!(event.getEntity() instanceof Arrow arrow)) {
             return;
         }
         if (!(event.getEntity().getShooter() instanceof LivingEntity)) {
             return;
         }
 
-        Arrow arrow = (Arrow) event.getEntity();
         LivingEntity entity = (LivingEntity) arrow.getShooter();
 
         if (entity.getEquipment() == null) {

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

@@ -0,0 +1,39 @@
+package com.willfp.eco.internal.config;
+
+import java.io.File;
+import java.io.IOException;
+
+public interface LoadableConfig {
+    /**
+     * Create the file.
+     */
+    void createFile();
+
+    /**
+     * Get resource path as relative to base directory.
+     *
+     * @return The resource path.
+     */
+    String getResourcePath();
+
+    /**
+     * Save the config.
+     *
+     * @throws IOException If error in saving.
+     */
+    void save() throws IOException;
+
+    /**
+     * Get the config file.
+     *
+     * @return The file.
+     */
+    File getConfigFile();
+
+    /**
+     * Get the config name (including extension)
+     *
+     * @return The name.
+     */
+    String getName();
+}

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

@@ -0,0 +1,16 @@
+package com.willfp.eco.internal.config.json;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Map;
+
+public class JSONConfigSection extends JSONConfigWrapper {
+    /**
+     * Config section.
+     *
+     * @param values The values.
+     */
+    public JSONConfigSection(@NotNull final Map<String, Object> values) {
+        this.init(values);
+    }
+}

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

@@ -0,0 +1,345 @@
+package com.willfp.eco.internal.config.json;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.willfp.eco.core.config.Config;
+import com.willfp.eco.core.config.JSONConfig;
+import com.willfp.eco.util.StringUtils;
+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.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+@SuppressWarnings({"unchecked", "unused"})
+public abstract class JSONConfigWrapper implements JSONConfig, Cloneable {
+    /**
+     * The linked {@link ConfigurationSection} where values are physically stored.
+     */
+    @Getter
+    private final Gson handle = new GsonBuilder().setPrettyPrinting().create();
+
+    /**
+     * All stored values.
+     */
+    @Getter
+    private final Map<String, Object> values = new HashMap<>();
+
+    /**
+     * All cached values.
+     */
+    @Getter
+    private final Map<String, Object> cache = new HashMap<>();
+
+    /**
+     * Abstract config.
+     */
+    protected JSONConfigWrapper() {
+
+    }
+
+    public void init(@NotNull final Map<String, Object> values) {
+        this.values.clear();
+        this.values.putAll(values);
+    }
+
+    @Override
+    public final void clearCache() {
+        cache.clear();
+    }
+
+    @Override
+    public String toPlaintext() {
+        return this.getHandle().toJson(this.getValues());
+    }
+
+    @Override
+    public boolean has(@NotNull final String path) {
+        return getOfKnownType(path, Object.class) != null;
+    }
+
+    @Nullable
+    protected <T> T getOfKnownType(@NotNull final String path,
+                                   @NotNull final Class<T> clazz) {
+        return getOfKnownType(path, clazz, true);
+    }
+
+    @Nullable
+    protected <T> T getOfKnownType(@NotNull final String path,
+                                   @NotNull final Class<T> clazz,
+                                   final boolean isBase) {
+        String closestPath = path;
+
+        if (cache.containsKey(path) && isBase) {
+            return (T) cache.get(path);
+        }
+
+        if (path.contains(".")) {
+            String[] split = path.split("\\.");
+            closestPath = split[0];
+        }
+
+        if (values.get(closestPath) instanceof Map && !path.equals(closestPath)) {
+            JSONConfigSection section = new JSONConfigSection((Map<String, Object>) values.get(closestPath));
+            return section.getOfKnownType(path.substring(closestPath.length() + 1), clazz, false);
+        } else {
+            if (values.containsKey(closestPath)) {
+                return (T) values.get(closestPath);
+            } else {
+                return null;
+            }
+        }
+    }
+
+    @NotNull
+    @Override
+    public List<String> getKeys(final boolean deep) {
+        if (deep) {
+            return new ArrayList<>(getDeepKeys(new HashSet<>(), ""));
+        } else {
+            return new ArrayList<>(values.keySet());
+        }
+    }
+
+    protected Set<String> getDeepKeys(@NotNull final Set<String> list,
+                                      @NotNull final String root) {
+        for (String key : values.keySet()) {
+            list.add(root + key);
+
+            if (values.get(key) instanceof Map) {
+                JSONConfigSection section = new JSONConfigSection((Map<String, Object>) values.get(key));
+                list.addAll(section.getDeepKeys(list, root + key + "."));
+            }
+        }
+
+        return list;
+    }
+
+    @Override
+    @Nullable
+    public Object get(@NotNull final String path) {
+        return getOfKnownType(path, Object.class);
+    }
+
+    @Override
+    public void set(@NotNull final String path,
+                    @Nullable final Object object) {
+        setRecursively(path, object, true);
+        clearCache();
+    }
+
+    protected void setRecursively(@NotNull final String path,
+                                  @Nullable final Object object,
+                                  final boolean isBase) {
+        String closestPath = path;
+
+        if (path.contains(".")) {
+            String[] split = path.split("\\.");
+            closestPath = split[0];
+        }
+
+        if (values.get(closestPath) instanceof Map && !path.equals(closestPath)) {
+            JSONConfigSection section = new JSONConfigSection((Map<String, Object>) values.get(closestPath));
+            section.setRecursively(path.substring(closestPath.length() + 1), object, false);
+            values.put(closestPath, section.getValues());
+        } else {
+            Object obj = object;
+
+            if (object instanceof JSONConfig) {
+                obj = ((JSONConfigWrapper) object).getValues();
+            }
+
+            values.put(path, obj);
+        }
+    }
+
+    @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 (values.containsKey(path)) {
+            Map<String, Object> subsection = (Map<String, Object>) values.get(path);
+            return new JSONConfigSection(subsection);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    @NotNull
+    public List<JSONConfig> getSubsections(@NotNull final String path) {
+        List<JSONConfig> subsections = getSubsectionsOrNull(path);
+        Validate.notNull(subsections);
+        return subsections;
+    }
+
+    @Override
+    @Nullable
+    public List<JSONConfig> getSubsectionsOrNull(@NotNull final String path) {
+        List<Map<String, Object>> maps = (List<Map<String, Object>>) getOfKnownType(path, Object.class);
+
+        if (maps == null) {
+            return null;
+        }
+
+        List<JSONConfig> configs = new ArrayList<>();
+
+        for (Map<String, Object> map : maps) {
+            configs.add(new JSONConfigSection(map));
+        }
+
+        return configs;
+    }
+
+    @Override
+    public int getInt(@NotNull final String path) {
+        // ew
+        return Objects.requireNonNullElse(getOfKnownType(path, Double.class), 0D).intValue();
+    }
+
+    @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) {
+        return Objects.requireNonNullElse(getOfKnownType(path, Integer.class), def);
+    }
+
+    @Override
+    @NotNull
+    public List<Integer> getInts(@NotNull final String path) {
+        return (List<Integer>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>());
+    }
+
+    @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) {
+        return Objects.requireNonNullElse(getOfKnownType(path, Boolean.class), false);
+    }
+
+    @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) {
+        return (List<Boolean>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>());
+    }
+
+    @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) {
+        return StringUtils.translate(Objects.requireNonNullElse(getOfKnownType(path, String.class), ""));
+    }
+
+    @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) {
+        return StringUtils.translateList((List<String>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>()));
+    }
+
+    @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) {
+        return Objects.requireNonNullElse(getOfKnownType(path, Double.class), 0D);
+    }
+
+    @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) {
+        return (List<Double>) Objects.requireNonNullElse(getOfKnownType(path, Object.class), new ArrayList<>());
+    }
+
+    @Override
+    @Nullable
+    public List<Double> getDoublesOrNull(@NotNull final String path) {
+        if (has(path)) {
+            return getDoubles(path);
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public JSONConfigWrapper clone() {
+        return new JSONConfigSection(new HashMap<>(this.getValues()));
+    }
+}

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

@@ -0,0 +1,155 @@
+package com.willfp.eco.internal.config.json;
+
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.config.LoadableConfig;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
+import java.util.HashMap;
+
+@SuppressWarnings({"unchecked", "unused"})
+public abstract class LoadableJsonConfig extends JSONConfigWrapper implements LoadableConfig {
+    /**
+     * The physical config file, as stored on disk.
+     */
+    @Getter
+    private final File configFile;
+
+    /**
+     * Plugin handle.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final EcoPlugin plugin;
+
+    /**
+     * The full name of the config file (eg config.json).
+     */
+    @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 LoadableJsonConfig(@NotNull final String configName,
+                                 @NotNull final EcoPlugin plugin,
+                                 @NotNull final String subDirectoryPath,
+                                 @NotNull final Class<?> source) {
+        this.plugin = plugin;
+        this.name = configName + ".json";
+        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);
+
+        try {
+            init(this.configFile);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        plugin.getConfigHandler().addConfig(this);
+    }
+
+    @Override
+    public 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.
+     */
+    @Override
+    public String getResourcePath() {
+        String resourcePath;
+
+        if (subDirectoryPath.isEmpty()) {
+            resourcePath = name;
+        } else {
+            resourcePath = subDirectoryPath + name;
+        }
+
+        return "/" + resourcePath;
+    }
+
+    /**
+     * Save the config.
+     *
+     * @throws IOException If error in saving.
+     */
+    @Override
+    public void save() throws IOException {
+        configFile.delete();
+        Files.write(configFile.toPath(), this.toPlaintext().getBytes(), StandardOpenOption.CREATE, StandardOpenOption.WRITE);
+    }
+
+    /**
+     * Initialize the config.
+     *
+     * @param file The config file.
+     * @throws FileNotFoundException If the file doesn't exist.
+     */
+    public void init(@NotNull final File file) throws FileNotFoundException {
+        super.init(this.getHandle().fromJson(new FileReader(file), HashMap.class));
+    }
+}

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

@@ -1,20 +1,29 @@
 package com.willfp.eco.internal.config.updating;
 
+import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
 import com.willfp.eco.core.config.ConfigUpdater;
+import com.willfp.eco.internal.config.LoadableConfig;
 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.io.IOException;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 public class ConfigHandler extends PluginDependent {
+    /**
+     * A set of all configs that can be saved.
+     */
+    private final List<LoadableConfig> configs = new ArrayList<>();
+
     /**
      * A set of all classes that can be updated.
      */
@@ -35,15 +44,18 @@ public class ConfigHandler extends PluginDependent {
     public void callUpdate() {
         updatableClasses.forEach(clazz -> Arrays.stream(clazz.getDeclaredMethods()).forEach(method -> {
             if (method.isAnnotationPresent(ConfigUpdater.class)) {
-                if (method.getParameterTypes().length != 0) {
-                    throw new InvalidUpdateMethodException("Update method must not have parameters.");
-                }
                 if (!Modifier.isStatic(method.getModifiers())) {
                     throw new InvalidUpdateMethodException("Update method must be static.");
                 }
 
                 try {
+                    if (method.getParameterCount() == 0) {
                         method.invoke(null);
+                    } else if (method.getParameterCount() == 1) {
+                        method.invoke(null, this.getPlugin());
+                    } else {
+                        throw new InvalidUpdateMethodException("Update method must have 0 parameters or a plugin parameter.");
+                    }
                 } catch (IllegalAccessException | InvocationTargetException e) {
                     e.printStackTrace();
                     throw new InvalidUpdateMethodException("Update method generated an exception.");
@@ -60,7 +72,7 @@ public class ConfigHandler extends PluginDependent {
     public void registerUpdatableClass(@NotNull final Class<?> updatableClass) {
         boolean isValid = false;
         for (Method method : updatableClass.getDeclaredMethods()) {
-            if (Modifier.isStatic(method.getModifiers()) && method.getParameterTypes().length == 0 && method.isAnnotationPresent(ConfigUpdater.class)) {
+            if (Modifier.isStatic(method.getModifiers()) && (method.getParameterCount() == 0 || method.getParameterCount() == 1) && method.isAnnotationPresent(ConfigUpdater.class)) {
                 isValid = true;
                 break;
             }
@@ -72,4 +84,25 @@ public class ConfigHandler extends PluginDependent {
 
         updatableClasses.add(updatableClass);
     }
+
+    /**
+     * Save all configs.
+     */
+    public void saveAllConfigs() {
+        try {
+            for (LoadableConfig config : configs) {
+                config.save();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * Add new config to be saved.
+     * @param config The config.
+     */
+    public void addConfig(@NotNull final LoadableConfig config) {
+        configs.add(config);
+    }
 }

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

@@ -1,9 +1,9 @@
-package com.willfp.eco.internal.config;
+package com.willfp.eco.internal.config.yaml;
 
 import org.bukkit.configuration.ConfigurationSection;
 import org.jetbrains.annotations.NotNull;
 
-public class ConfigSection extends ConfigWrapper<ConfigurationSection> {
+public class ConfigSection extends YamlConfigWrapper<ConfigurationSection> {
     /**
      * Config section.
      *

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

@@ -1,26 +1,23 @@
-package com.willfp.eco.internal.config;
+package com.willfp.eco.internal.config.yaml;
 
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.internal.config.LoadableConfig;
 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> {
+public abstract class LoadableYamlConfig extends YamlConfigWrapper<YamlConfiguration> implements LoadableConfig {
     /**
      * The physical config file, as stored on disk.
      */
-    @Getter(AccessLevel.PROTECTED)
+    @Getter
     private final File configFile;
 
     /**
@@ -77,7 +74,8 @@ public abstract class LoadableYamlConfig extends ConfigWrapper<YamlConfiguration
         init(YamlConfiguration.loadConfiguration(configFile));
     }
 
-    private void createFile() {
+    @Override
+    public void createFile() {
         String resourcePath = getResourcePath();
         InputStream in = source.getResourceAsStream(resourcePath);
 
@@ -102,14 +100,12 @@ public abstract class LoadableYamlConfig extends ConfigWrapper<YamlConfiguration
             }
         } catch (IOException ignored) {
         }
+
+        plugin.getConfigHandler().addConfig(this);
     }
 
-    /**
+    @Override
-     * Get resource path as relative to base directory.
+    public String getResourcePath() {
-     *
-     * @return The resource path.
-     */
-    protected String getResourcePath() {
         String resourcePath;
 
         if (subDirectoryPath.isEmpty()) {
@@ -121,35 +117,7 @@ public abstract class LoadableYamlConfig extends ConfigWrapper<YamlConfiguration
         return "/" + resourcePath;
     }
 
-    /**
+    @Override
-     * 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/yaml/UpdatableYamlConfig.java

@@ -1,11 +1,15 @@
-package com.willfp.eco.internal.config;
+package com.willfp.eco.internal.config.yaml;
 
 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.BufferedReader;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -84,4 +88,23 @@ public abstract class UpdatableYamlConfig extends LoadableYamlConfig {
             e.printStackTrace();
         }
     }
+
+    public YamlConfiguration getConfigInJar() {
+        InputStream newIn = this.getSource().getResourceAsStream(getResourcePath());
+
+        if (newIn == null) {
+            throw new NullPointerException(this.getName() + " 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;
+    }
 }

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

@@ -1,10 +1,11 @@
-package com.willfp.eco.internal.config;
+package com.willfp.eco.internal.config.yaml;
 
-import com.willfp.eco.util.StringUtils;
 import com.willfp.eco.core.config.Config;
+import com.willfp.eco.util.StringUtils;
 import lombok.Getter;
 import org.apache.commons.lang.Validate;
 import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.YamlConfiguration;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -15,7 +16,7 @@ import java.util.Map;
 import java.util.Objects;
 
 @SuppressWarnings({"unchecked", "unused"})
-public abstract class ConfigWrapper<T extends ConfigurationSection> implements Config {
+public abstract class YamlConfigWrapper<T extends ConfigurationSection> implements Config {
     /**
      * The linked {@link ConfigurationSection} where values are physically stored.
      */
@@ -30,7 +31,7 @@ public abstract class ConfigWrapper<T extends ConfigurationSection> implements C
     /**
      * Abstract config.
      */
-    protected ConfigWrapper() {
+    protected YamlConfigWrapper() {
 
     }
 
@@ -39,6 +40,15 @@ public abstract class ConfigWrapper<T extends ConfigurationSection> implements C
         return this;
     }
 
+    @Override
+    public String toPlaintext() {
+        YamlConfiguration temp = new YamlConfiguration();
+        for (String key : handle.getKeys(true)) {
+            temp.set(key, handle.get(key));
+        }
+        return temp.saveToString();
+    }
+
     @Override
     public final void clearCache() {
         cache.clear();
@@ -210,7 +220,7 @@ public abstract class ConfigWrapper<T extends ConfigurationSection> implements C
     @NotNull
     public List<String> getStrings(@NotNull final String path) {
         if (cache.containsKey(path)) {
-            return (List<String>) cache.get(path);
+            return StringUtils.translateList((List<String>) cache.get(path));
         } else {
             cache.put(path, has(path) ? new ArrayList<>(handle.getStringList(path)) : new ArrayList<>());
             return getStrings(path);

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

@@ -110,11 +110,10 @@ public class EcoExtensionLoader extends PluginDependent implements ExtensionLoad
             e.printStackTrace();
         }
 
-        if (!(object instanceof Extension)) {
+        if (!(object instanceof Extension extension)) {
             throw new MalformedExtensionException(extensionJar.getName() + " is invalid");
         }
 
-        Extension extension = (Extension) object;
         extension.setMetadata(metadata);
         extension.enable();
         extensions.add(extension);

eco-api/src/main/java/com/willfp/eco/internal/gui/EcoMenu.java

@@ -59,7 +59,7 @@ public class EcoMenu implements Menu {
                 if (i == rows * 9) {
                     break;
                 }
-                ItemStack slotItem = item.getItemStack();
+                ItemStack slotItem = item.getItemStack(player);
                 ItemMeta meta = slotItem.getItemMeta();
                 if (meta != null) {
                     List<String> lore = meta.getLore();

eco-api/src/main/java/com/willfp/eco/internal/gui/EcoSlot.java

@@ -2,16 +2,18 @@ package com.willfp.eco.internal.gui;
 
 import com.willfp.eco.core.gui.slot.Slot;
 import lombok.Getter;
+import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.function.BiConsumer;
+import java.util.function.Function;
 
 public class EcoSlot implements Slot {
     @Getter
-    private final ItemStack itemStack;
+    private final Function<Player, ItemStack> provider;
 
     private final BiConsumer<InventoryClickEvent, Slot> onLeftClick;
 
@@ -23,13 +25,13 @@ public class EcoSlot implements Slot {
 
     private final BiConsumer<InventoryClickEvent, Slot> onMiddleClick;
 
-    public EcoSlot(@NotNull final ItemStack itemStack,
+    public EcoSlot(@NotNull final Function<Player, ItemStack> provider,
                    @Nullable final BiConsumer<InventoryClickEvent, Slot> onLeftClick,
                    @Nullable final BiConsumer<InventoryClickEvent, Slot> onRightClick,
                    @Nullable final BiConsumer<InventoryClickEvent, Slot> onShiftLeftClick,
                    @Nullable final BiConsumer<InventoryClickEvent, Slot> onShiftRightClick,
                    @Nullable final BiConsumer<InventoryClickEvent, Slot> onMiddleClick) {
-        this.itemStack = itemStack;
+        this.provider = provider;
         this.onLeftClick = onLeftClick == null ? ((event, slot) -> { }) : onLeftClick;
         this.onRightClick = onRightClick == null ? ((event, slot) -> { }) : onRightClick;
         this.onShiftLeftClick = onShiftLeftClick == null ? ((event, slot) -> { }) : onShiftLeftClick;
@@ -39,23 +41,17 @@ public class EcoSlot implements Slot {
 
     public void handleInventoryClick(@NotNull final InventoryClickEvent event) {
         switch (event.getClick()) {
-            case LEFT:
+            case LEFT -> this.onLeftClick.accept(event, this);
-                this.onLeftClick.accept(event, this);
+            case RIGHT -> this.onRightClick.accept(event, this);
-                break;
+            case SHIFT_LEFT -> this.onShiftLeftClick.accept(event, this);
-            case RIGHT:
+            case SHIFT_RIGHT -> this.onShiftRightClick.accept(event, this);
-                this.onRightClick.accept(event, this);
+            case MIDDLE -> this.onMiddleClick.accept(event, this);
-                break;
+            default -> { }
-            case SHIFT_LEFT:
-                this.onShiftLeftClick.accept(event, this);
-                break;
-            case SHIFT_RIGHT:
-                this.onShiftRightClick.accept(event, this);
-                break;
-            case MIDDLE:
-                this.onMiddleClick.accept(event, this);
-                break;
-            default:
-                break;
         }
     }
+
+    @Override
+    public ItemStack getItemStack(@NotNull final Player player) {
+        return provider.apply(player);
+    }
 }

eco-api/src/main/java/com/willfp/eco/internal/gui/FillerSlot.java

@@ -10,6 +10,6 @@ public class FillerSlot extends EcoSlot {
      * @param itemStack The ItemStack.
      */
     public FillerSlot(@NotNull final ItemStack itemStack) {
-        super(itemStack, null, null, null, null, null);
+        super((player) -> itemStack, null, null, null, null, null);
     }
 }

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

@@ -0,0 +1,194 @@
+package com.willfp.eco.internal.items;
+
+import com.willfp.eco.core.items.builder.ItemBuilder;
+import com.willfp.eco.util.StringUtils;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.apache.commons.lang.Validate;
+import org.bukkit.Material;
+import org.bukkit.NamespacedKey;
+import org.bukkit.enchantments.Enchantment;
+import org.bukkit.inventory.ItemFlag;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.bukkit.persistence.PersistentDataType;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Supplier;
+
+@SuppressWarnings("unchecked")
+public abstract class AbstractItemStackBuilder<T extends ItemMeta, U extends AbstractItemStackBuilder<T, U>> implements ItemBuilder {
+    /**
+     * The ItemMeta used while building.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final T meta;
+
+    /**
+     * The ItemStack.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final ItemStack base;
+
+    /**
+     * Create a new ItemStackBuilder.
+     *
+     * @param material The material.
+     */
+    protected AbstractItemStackBuilder(@NotNull final Material material) {
+        this(new ItemStack(material));
+    }
+
+    /**
+     * Create a new ItemStackBuilder to modify an existing item.
+     *
+     * @param base The ItemStack to start with.
+     */
+    protected AbstractItemStackBuilder(@NotNull final ItemStack base) {
+        this.base = base;
+        this.meta = (T) base.getItemMeta();
+        assert meta != null;
+    }
+
+    @Override
+    public U setAmount(final int amount) {
+        Validate.isTrue(amount >= 1 && amount <= base.getMaxStackSize());
+        base.setAmount(amount);
+        return (U) this;
+    }
+
+    @Override
+    public U setAmount(@NotNull final Supplier<Integer> amount) {
+        return setAmount(amount.get());
+    }
+
+    @Override
+    public U addEnchantment(@NotNull final Enchantment enchantment,
+                            final int level) {
+        meta.addEnchant(enchantment, level, true);
+        return (U) this;
+    }
+
+    @Override
+    public U addEnchantment(@NotNull final Supplier<Enchantment> enchantment,
+                            @NotNull final Supplier<Integer> level) {
+        return addEnchantment(enchantment.get(), level.get());
+    }
+
+    @Override
+    public U setDisplayName(@NotNull final String name) {
+        meta.setDisplayName(StringUtils.translate(name));
+        return (U) this;
+    }
+
+    @Override
+    public U setDisplayName(@NotNull final Supplier<String> name) {
+        String result = name.get();
+
+        return result == null ? (U) this : setDisplayName(name.get());
+    }
+
+    @Override
+    public U addLoreLine(@NotNull final String line) {
+        List<String> lore = meta.hasLore() ? meta.getLore() : new ArrayList<>();
+        assert lore != null;
+        lore.add(StringUtils.translate(line));
+        meta.setLore(lore);
+
+        return (U) this;
+    }
+
+    @Override
+    public U addLoreLine(@NotNull final Supplier<String> line) {
+        String result = line.get();
+
+        return result == null ? (U) this : addLoreLine(line.get());
+    }
+
+    @Override
+    public U addLoreLines(@NotNull final List<String> lines) {
+        List<String> lore = meta.hasLore() ? meta.getLore() : new ArrayList<>();
+        assert lore != null;
+        for (String line : lines) {
+            lore.add(StringUtils.translate(line));
+        }
+        meta.setLore(lore);
+
+        return (U) this;
+    }
+
+    @Override
+    public U addLoreLines(@NotNull final Supplier<List<String>> lines) {
+        List<String> result = lines.get();
+
+        return result == null ? (U) this : addLoreLines(lines.get());
+    }
+
+    @Override
+    public U addItemFlag(@NotNull final ItemFlag... itemFlags) {
+        meta.addItemFlags(itemFlags);
+
+        return (U) this;
+    }
+
+    @Override
+    public U addItemFlag(@NotNull final Supplier<ItemFlag[]> itemFlags) {
+        ItemFlag[] result = itemFlags.get();
+
+        return result == null ? (U) this : addItemFlag(result);
+    }
+
+    @Override
+    public <A, B> U writeMetaKey(@NotNull final NamespacedKey key,
+                                 @NotNull final PersistentDataType<A, B> type,
+                                 @NotNull final B value) {
+        meta.getPersistentDataContainer().set(key, type, value);
+
+        return (U) this;
+    }
+
+    @Override
+    public <A, B> U writeMetaKey(@NotNull final Supplier<NamespacedKey> key,
+                                 @NotNull final Supplier<PersistentDataType<A, B>> type,
+                                 @NotNull final Supplier<B> value) {
+        return writeMetaKey(key.get(), type.get(), value.get());
+    }
+
+    @Override
+    public U setUnbreakable(final boolean unbreakable) {
+        meta.setUnbreakable(unbreakable);
+
+        return (U) this;
+    }
+
+    @Override
+    public U setUnbreakable(@NotNull final Supplier<Boolean> unbreakable) {
+        Boolean result = unbreakable.get();
+
+        return result == null ? (U) this : setUnbreakable(unbreakable);
+    }
+
+    @Override
+    public U setCustomModelData(@Nullable final Integer data) {
+        meta.setCustomModelData(data);
+
+        return (U) this;
+    }
+
+    @Override
+    public U setCustomModelData(@NotNull final Supplier<Integer> data) {
+        Integer result = data.get();
+
+        return result == null ? (U) this : setCustomModelData(result);
+    }
+
+    @Override
+    public ItemStack build() {
+        base.setItemMeta(meta);
+
+        return base;
+    }
+}

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

@@ -121,8 +121,7 @@ public class DurabilityUtils {
             return;
         }
 
-        if (item.getItemMeta() instanceof Damageable) {
+        if (item.getItemMeta() instanceof Damageable meta) {
-            Damageable meta = (Damageable) item.getItemMeta();
             meta.setDamage(meta.getDamage() - repair);
 
             if (meta.getDamage() < 0) {

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

@@ -39,6 +39,33 @@ public class StringUtils {
             .add(Pattern.compile("<#" + "([A-Fa-f0-9]{6})" + ">"))
             .build();
 
+    /**
+     * Translate a list of strings - converts Placeholders and Color codes.
+     *
+     * @param list The messages to translate.
+     * @param player  The player to translate placeholders with respect to.
+     * @return The message, translated.
+     */
+    public List<String> translateList(@NotNull final List<String> list,
+                                      @Nullable final Player player) {
+        List<String> translated = new ArrayList<>();
+        for (String string : list) {
+            translated.add(translate(string, player));
+        }
+
+        return translated;
+    }
+
+    /**
+     * Translate a list of strings - converts Placeholders and Color codes.
+     *
+     * @param list The messages to translate.
+     * @return The message, translated.
+     */
+    public List<String> translateList(@NotNull final List<String> list) {
+        return translateList(list, null);
+    }
+
     /**
      * Translate a string - converts Placeholders and Color codes.
      *
@@ -79,16 +106,16 @@ public class StringUtils {
                                                  @NotNull final Pattern pattern) {
         Matcher matcher = pattern.matcher(message);
 
-        StringBuffer buffer = new StringBuffer(message.length() + 4 * 8);
+        StringBuilder builder = new StringBuilder(message.length() + 4 * 8);
         while (matcher.find()) {
             String group = matcher.group(1);
-            matcher.appendReplacement(buffer, COLOR_CHAR + "x"
+            matcher.appendReplacement(builder, 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();
+        return matcher.appendTail(builder).toString();
     }
 
     /**
@@ -198,8 +225,7 @@ public class StringUtils {
             return (String) object;
         } else if (object instanceof Double) {
             return NumberUtils.format((Double) object);
-        } else if (object instanceof Collection<?>) {
+        } else if (object instanceof Collection<?> c) {
-            Collection<?> c = (Collection<?>) object;
             return c.stream().map(StringUtils::internalToString).collect(Collectors.joining(", "));
         } else {
             return String.valueOf(object);

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

@@ -2,6 +2,7 @@ package com.willfp.eco.util;
 
 import com.google.common.collect.BiMap;
 import com.google.common.collect.HashBiMap;
+import com.willfp.eco.core.Prerequisite;
 import lombok.experimental.UtilityClass;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
@@ -10,6 +11,8 @@ import org.bukkit.scoreboard.Scoreboard;
 import org.bukkit.scoreboard.Team;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.HashMap;
+import java.util.Map;
 import java.util.stream.Collectors;
 
 @UtilityClass
@@ -17,7 +20,7 @@ public class TeamUtils {
     /**
      * Ore ChatColors.
      */
-    private static final BiMap<Material, ChatColor> MATERIAL_COLORS = HashBiMap.create();
+    private static final Map<Material, ChatColor> MATERIAL_COLORS = new HashMap<>();
 
     /**
      * All chat color teams.
@@ -73,13 +76,25 @@ public class TeamUtils {
             fromChatColor(value);
         }
 
-        MATERIAL_COLORS.forcePut(Material.COAL_ORE, ChatColor.BLACK);
+        MATERIAL_COLORS.put(Material.COAL_ORE, ChatColor.BLACK);
-        MATERIAL_COLORS.forcePut(Material.IRON_ORE, ChatColor.GRAY);
+        MATERIAL_COLORS.put(Material.IRON_ORE, ChatColor.GRAY);
-        MATERIAL_COLORS.forcePut(Material.GOLD_ORE, ChatColor.YELLOW);
+        MATERIAL_COLORS.put(Material.GOLD_ORE, ChatColor.YELLOW);
-        MATERIAL_COLORS.forcePut(Material.LAPIS_ORE, ChatColor.BLUE);
+        MATERIAL_COLORS.put(Material.LAPIS_ORE, ChatColor.BLUE);
-        MATERIAL_COLORS.forcePut(Material.REDSTONE_ORE, ChatColor.RED);
+        MATERIAL_COLORS.put(Material.REDSTONE_ORE, ChatColor.RED);
-        MATERIAL_COLORS.forcePut(Material.DIAMOND_ORE, ChatColor.AQUA);
+        MATERIAL_COLORS.put(Material.DIAMOND_ORE, ChatColor.AQUA);
-        MATERIAL_COLORS.forcePut(Material.EMERALD_ORE, ChatColor.GREEN);
+        MATERIAL_COLORS.put(Material.EMERALD_ORE, ChatColor.GREEN);
-        MATERIAL_COLORS.forcePut(Material.ANCIENT_DEBRIS, ChatColor.DARK_RED);
+        MATERIAL_COLORS.put(Material.ANCIENT_DEBRIS, ChatColor.DARK_RED);
+
+        if (Prerequisite.HAS_1_17.isMet()) {
+            MATERIAL_COLORS.put(Material.COPPER_ORE, ChatColor.GOLD);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_COPPER_ORE, ChatColor.GOLD);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_COAL_ORE, ChatColor.BLACK);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_IRON_ORE, ChatColor.GRAY);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_GOLD_ORE, ChatColor.YELLOW);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_LAPIS_ORE, ChatColor.BLUE);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_REDSTONE_ORE, ChatColor.RED);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_DIAMOND_ORE, ChatColor.AQUA);
+            MATERIAL_COLORS.put(Material.DEEPSLATE_EMERALD_ORE, ChatColor.GREEN);
+        }
     }
 }

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

@@ -22,11 +22,10 @@ import java.util.Arrays;
 public final class ChatComponent implements ChatComponentProxy {
     @Override
     public Object modifyComponent(@NotNull final Object object) {
-        if (!(object instanceof IChatBaseComponent)) {
+        if (!(object instanceof IChatBaseComponent chatComponent)) {
             return object;
         }
 
-        IChatBaseComponent chatComponent = (IChatBaseComponent) object;
         for (IChatBaseComponent iChatBaseComponent : chatComponent) {
             if (iChatBaseComponent == null) {
                 continue;

eco-core/core-nms/v1_16_R2/src/main/java/com/willfp/eco/proxy/v1_16_R2/ChatComponent.java

@@ -22,11 +22,10 @@ import java.util.Arrays;
 public final class ChatComponent implements ChatComponentProxy {
     @Override
     public Object modifyComponent(@NotNull final Object object) {
-        if (!(object instanceof IChatBaseComponent)) {
+        if (!(object instanceof IChatBaseComponent chatComponent)) {
             return object;
         }
 
-        IChatBaseComponent chatComponent = (IChatBaseComponent) object;
         for (IChatBaseComponent iChatBaseComponent : chatComponent) {
             if (iChatBaseComponent == null) {
                 continue;

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

@@ -22,11 +22,10 @@ import java.util.Arrays;
 public final class ChatComponent implements ChatComponentProxy {
     @Override
     public Object modifyComponent(@NotNull final Object object) {
-        if (!(object instanceof IChatBaseComponent)) {
+        if (!(object instanceof IChatBaseComponent chatComponent)) {
             return object;
         }
 
-        IChatBaseComponent chatComponent = (IChatBaseComponent) object;
         for (IChatBaseComponent iChatBaseComponent : chatComponent) {
             if (iChatBaseComponent == null) {
                 continue;

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

@@ -22,11 +22,10 @@ import java.util.Arrays;
 public final class ChatComponent implements ChatComponentProxy {
     @Override
     public Object modifyComponent(@NotNull final Object object) {
-        if (!(object instanceof IChatBaseComponent)) {
+        if (!(object instanceof IChatBaseComponent chatComponent)) {
             return object;
         }
 
-        IChatBaseComponent chatComponent = (IChatBaseComponent) object;
         for (IChatBaseComponent iChatBaseComponent : chatComponent) {
             if (iChatBaseComponent == null) {
                 continue;

eco-core/core-plugin/build.gradle

@@ -4,6 +4,7 @@ version rootProject.version
 dependencies {
     implementation 'org.apache.maven:maven-artifact:3.0.3'
     implementation 'org.bstats:bstats-bukkit:1.7'
+    implementation 'com.google.code.gson:gson:2.8.7'
     compileOnly 'org.spigotmc:spigot-api:1.16.5-R0.1-SNAPSHOT'
     compileOnly project(":eco-core:core-proxy")
     compileOnly 'com.comphenix.protocol:ProtocolLib:4.6.0-SNAPSHOT'

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

@@ -3,6 +3,7 @@ package com.willfp.eco.spigot;
 import com.willfp.eco.core.AbstractPacketAdapter;
 import com.willfp.eco.core.EcoPlugin;
 import com.willfp.eco.core.command.AbstractCommand;
+import com.willfp.eco.core.config.base.LangYml;
 import com.willfp.eco.core.data.Data;
 import com.willfp.eco.core.display.Display;
 import com.willfp.eco.core.display.DisplayModule;
@@ -10,10 +11,11 @@ import com.willfp.eco.core.integrations.IntegrationLoader;
 import com.willfp.eco.core.integrations.anticheat.AnticheatManager;
 import com.willfp.eco.core.integrations.antigrief.AntigriefManager;
 import com.willfp.eco.core.integrations.mcmmo.McmmoManager;
+import com.willfp.eco.internal.InternalInterfacing;
 import com.willfp.eco.proxy.proxies.BlockBreakProxy;
 import com.willfp.eco.proxy.proxies.SkullProxy;
 import com.willfp.eco.proxy.proxies.TridentStackProxy;
-import com.willfp.eco.spigot.config.DataYml;
+import com.willfp.eco.spigot.config.DataJson;
 import com.willfp.eco.spigot.display.PacketAutoRecipe;
 import com.willfp.eco.spigot.display.PacketChat;
 import com.willfp.eco.spigot.display.PacketOpenWindowMerchant;
@@ -25,8 +27,13 @@ import com.willfp.eco.spigot.eventlisteners.ArmorListener;
 import com.willfp.eco.spigot.eventlisteners.DispenserArmorListener;
 import com.willfp.eco.spigot.eventlisteners.EntityDeathByEntityListeners;
 import com.willfp.eco.spigot.eventlisteners.NaturalExpGainListeners;
+import com.willfp.eco.spigot.eventlisteners.PlayerJumpListeners;
 import com.willfp.eco.spigot.gui.GUIListener;
-import com.willfp.eco.spigot.integrations.anticheat.*;
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatAAC;
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatMatrix;
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatNCP;
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatSpartan;
+import com.willfp.eco.spigot.integrations.anticheat.AnticheatVulcan;
 import com.willfp.eco.spigot.integrations.antigrief.AntigriefCombatLogX;
 import com.willfp.eco.spigot.integrations.antigrief.AntigriefFactionsUUID;
 import com.willfp.eco.spigot.integrations.antigrief.AntigriefGriefPrevention;
@@ -56,9 +63,9 @@ public class EcoSpigotPlugin extends EcoPlugin {
     private static EcoSpigotPlugin instance;
 
     /**
-     * data.yml.
+     * data.json.
      */
-    private final DataYml dataYml;
+    private final DataJson dataJson;
 
     /**
      * Create a new instance of eco.
@@ -77,8 +84,15 @@ public class EcoSpigotPlugin extends EcoPlugin {
         TridentStackProxy tridentStackProxy = InternalProxyUtils.getProxy(TridentStackProxy.class);
         TridentUtils.initialize(tridentStackProxy::getTridentStack);
 
-        this.dataYml = new DataYml(this);
+        this.dataJson = new DataJson(this);
-        Data.init(this.dataYml);
+        Data.init(this.dataJson);
+
+        InternalInterfacing.setInterfacing(new InternalInterfacing() {
+            @Override
+            public LangYml getLang() {
+                return EcoSpigotPlugin.getInstance().getLangYml();
+            }
+        });
     }
 
     @Override
@@ -89,7 +103,7 @@ public class EcoSpigotPlugin extends EcoPlugin {
     @Override
     public void disable() {
         try {
-            Data.save(this.dataYml);
+            Data.save(this.dataJson);
         } catch (IOException e) {
             e.printStackTrace();
         }
@@ -163,7 +177,8 @@ public class EcoSpigotPlugin extends EcoPlugin {
                 new ArmorListener(),
                 new DispenserArmorListener(),
                 new EntityDeathByEntityListeners(this),
-                new ShapedRecipeListener(),
+                new ShapedRecipeListener(this),
+                new PlayerJumpListeners(),
                 new GUIListener(this)
         );
     }

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/config/DataJson.java

@@ -0,0 +1,16 @@
+package com.willfp.eco.spigot.config;
+
+import com.willfp.eco.core.config.JsonStaticBaseConfig;
+import com.willfp.eco.spigot.EcoSpigotPlugin;
+import org.jetbrains.annotations.NotNull;
+
+public class DataJson extends JsonStaticBaseConfig {
+    /**
+     * Init data.json.
+     *
+     * @param plugin EcoSpigotPlugin.
+     */
+    public DataJson(@NotNull final EcoSpigotPlugin plugin) {
+        super("data", plugin);
+    }
+}

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/config/DataYml.java

@@ -1,16 +0,0 @@
-package com.willfp.eco.spigot.config;
-
-import com.willfp.eco.core.config.BaseConfig;
-import com.willfp.eco.spigot.EcoSpigotPlugin;
-import org.jetbrains.annotations.NotNull;
-
-public class DataYml extends BaseConfig {
-    /**
-     * Init data.yml.
-     *
-     * @param plugin EcoSpigotPlugin.
-     */
-    public DataYml(@NotNull final EcoSpigotPlugin plugin) {
-        super("data", false, plugin);
-    }
-}

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

@@ -12,8 +12,7 @@ public class DispenserArmorListener implements Listener {
     @EventHandler
     public void dispenseArmorEvent(@NotNull final BlockDispenseArmorEvent event) {
         ArmorType type = ArmorType.matchType(event.getItem());
-        if (type != null && event.getTargetEntity() instanceof Player) {
+        if (type != null && event.getTargetEntity() instanceof Player p) {
-            Player p = (Player) event.getTargetEntity();
             ArmorEquipEvent armorEquipEvent = new ArmorEquipEvent(p);
             Bukkit.getPluginManager().callEvent(armorEquipEvent);
         }

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

@@ -41,12 +41,10 @@ public class EntityDeathByEntityListeners extends PluginDependent implements Lis
      */
     @EventHandler(priority = EventPriority.HIGH)
     public void onEntityDamage(@NotNull final EntityDamageByEntityEvent event) {
-        if (!(event.getEntity() instanceof LivingEntity)) {
+        if (!(event.getEntity() instanceof LivingEntity victim)) {
             return;
         }
 
-        LivingEntity victim = (LivingEntity) event.getEntity();
-
         if (victim.getHealth() > event.getFinalDamage()) {
             return;
         }

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

@@ -0,0 +1,62 @@
+package com.willfp.eco.spigot.eventlisteners;
+
+import com.willfp.eco.core.events.PlayerJumpEvent;
+import com.willfp.eco.core.integrations.mcmmo.McmmoManager;
+import org.bukkit.Bukkit;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.bukkit.potion.PotionEffectType;
+import org.jetbrains.annotations.NotNull;
+
+import java.text.DecimalFormat;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+@SuppressWarnings("deprecation")
+public class PlayerJumpListeners implements Listener {
+    /**
+     * For jump listeners.
+     */
+    private static final Set<UUID> PREVIOUS_PLAYERS_ON_GROUND = new HashSet<>();
+
+    /**
+     * For jump listeners.
+     */
+    private static final DecimalFormat FORMAT = new DecimalFormat("0.00");
+
+    /**
+     * Called when a player jumps.
+     *
+     * @param event The event to listen for.
+     */
+    @EventHandler(ignoreCancelled = true)
+    public void onJump(@NotNull final PlayerMoveEvent event) {
+        if (McmmoManager.isFake(event)) {
+            return;
+        }
+
+        Player player = event.getPlayer();
+        if (player.getVelocity().getY() > 0) {
+            float jumpVelocity = 0.42f;
+            if (player.hasPotionEffect(PotionEffectType.JUMP)) {
+                jumpVelocity += ((float) player.getPotionEffect(PotionEffectType.JUMP).getAmplifier() + 1) * 0.1F;
+            }
+            jumpVelocity = Float.parseFloat(FORMAT.format(jumpVelocity).replace(',', '.'));
+            if (event.getPlayer().getLocation().getBlock().getType() != Material.LADDER
+                    && PREVIOUS_PLAYERS_ON_GROUND.contains(player.getUniqueId())
+                    && !player.isOnGround()
+                    && Float.compare((float) player.getVelocity().getY(), jumpVelocity) == 0) {
+                Bukkit.getPluginManager().callEvent(new PlayerJumpEvent(event));
+            }
+        }
+        if (player.isOnGround()) {
+            PREVIOUS_PLAYERS_ON_GROUND.add(player.getUniqueId());
+        } else {
+            PREVIOUS_PLAYERS_ON_GROUND.remove(player.getUniqueId());
+        }
+    }
+}

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/gui/GUIListener.java

@@ -2,20 +2,15 @@ package com.willfp.eco.spigot.gui;
 
 import com.willfp.eco.core.EcoPlugin;
 import com.willfp.eco.core.PluginDependent;
-import com.willfp.eco.core.gui.menu.FillerMask;
 import com.willfp.eco.core.gui.menu.Menu;
-import com.willfp.eco.core.gui.slot.Slot;
 import com.willfp.eco.internal.gui.EcoMenu;
 import com.willfp.eco.internal.gui.EcoSlot;
 import com.willfp.eco.internal.gui.MenuHandler;
-import org.bukkit.Material;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.inventory.InventoryClickEvent;
 import org.bukkit.event.inventory.InventoryCloseEvent;
-import org.bukkit.event.player.AsyncPlayerChatEvent;
-import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 
 public class GUIListener extends PluginDependent implements Listener {
@@ -65,31 +60,4 @@ public class GUIListener extends PluginDependent implements Listener {
 
         this.getPlugin().getScheduler().run(() -> MenuHandler.unregisterMenu(event.getInventory()));
     }
-
-    @EventHandler
-    public void test(@NotNull final AsyncPlayerChatEvent event) {
-        String message = event.getMessage();
-        if (!message.equals("guitest")) {
-            return;
-        }
-
-        this.getPlugin().getScheduler().run(() -> {
-            Menu.builder(5)
-                    .setMask(new FillerMask(
-                            Material.BLACK_STAINED_GLASS_PANE,
-                            "111111111",
-                            "100000001",
-                            "100000001",
-                            "100000001",
-                            "111111111"
-                    ))
-                    .setSlot(1, 3, Slot.builder(new ItemStack(Material.TNT))
-                            .onLeftClick((event1, slot) -> event1.getWhoClicked().sendMessage("CLICK"))
-                            .build())
-                    .setTitle("Poggers")
-                    .onClose(event1 -> event1.getPlayer().sendMessage("CLOSED"))
-                    .build()
-                    .open(event.getPlayer());
-        });
-    }
 }

eco-core/core-plugin/src/main/java/com/willfp/eco/spigot/recipes/ShapedRecipeListener.java

@@ -1,15 +1,18 @@
 package com.willfp.eco.spigot.recipes;
 
 import com.willfp.eco.core.EcoPlugin;
+import com.willfp.eco.core.PluginDependent;
 import com.willfp.eco.core.items.Items;
 import com.willfp.eco.core.items.TestableItem;
 import com.willfp.eco.core.recipe.Recipes;
 import com.willfp.eco.core.recipe.parts.MaterialTestableItem;
+import com.willfp.eco.core.recipe.parts.TestableStack;
 import com.willfp.eco.core.recipe.recipes.CraftingRecipe;
 import com.willfp.eco.core.recipe.recipes.ShapedCraftingRecipe;
 import org.bukkit.Material;
 import org.bukkit.event.Event;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.inventory.CraftItemEvent;
 import org.bukkit.event.inventory.PrepareItemCraftEvent;
@@ -18,7 +21,16 @@ import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.ShapedRecipe;
 import org.jetbrains.annotations.NotNull;
 
-public class ShapedRecipeListener implements Listener {
+public class ShapedRecipeListener extends PluginDependent implements Listener {
+    /**
+     * Pass an {@link EcoPlugin} in order to interface with it.
+     *
+     * @param plugin The plugin to manage.
+     */
+    public ShapedRecipeListener(@NotNull final EcoPlugin plugin) {
+        super(plugin);
+    }
+
     /**
      * Called on item craft.
      *
@@ -26,12 +38,10 @@ public class ShapedRecipeListener implements Listener {
      */
     @EventHandler
     public void complexRecipeListener(@NotNull final PrepareItemCraftEvent event) {
-        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
             return;
         }
 
-        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
-
         if (!EcoPlugin.LOADED_ECO_PLUGINS.contains(recipe.getKey().getNamespace())) {
             return;
         }
@@ -58,12 +68,10 @@ public class ShapedRecipeListener implements Listener {
      */
     @EventHandler
     public void complexRecipeListener(@NotNull final CraftItemEvent event) {
-        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
             return;
         }
 
-        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
-
         if (!EcoPlugin.LOADED_ECO_PLUGINS.contains(recipe.getKey().getNamespace())) {
             return;
         }
@@ -92,22 +100,52 @@ public class ShapedRecipeListener implements Listener {
      *
      * @param event The event to listen for.
      */
-    @EventHandler
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
-    public void preventUsingComplexPartInEcoRecipe(@NotNull final PrepareItemCraftEvent event) {
+    public void stackedRecipeListener(@NotNull final CraftItemEvent event) {
-        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
             return;
         }
 
-        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
+        if (!EcoPlugin.LOADED_ECO_PLUGINS.contains(recipe.getKey().getNamespace())) {
+            return;
+        }
+
+        ItemStack[] matrix = event.getInventory().getMatrix();
+        CraftingRecipe matched = Recipes.getMatch(matrix);
+
+        if (matched == null) {
+            return;
+        }
+
+        this.getPlugin().getScheduler().runLater(() -> {
+            for (int i = 0; i < 9; i++) {
+                ItemStack inMatrix = event.getInventory().getMatrix()[i];
+                TestableItem inRecipe = matched.getParts().get(i);
+
+                if (inRecipe instanceof TestableStack testableStack) {
+                    inMatrix.setAmount(inMatrix.getAmount() - (testableStack.getAmount() - 1));
+                }
+            }
+        }, 1);
+    }
+
+    /**
+     * Called on item craft.
+     *
+     * @param event The event to listen for.
+     */
+    @EventHandler
+    public void preventUsingComplexPartInEcoRecipe(@NotNull final PrepareItemCraftEvent event) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
+            return;
+        }
 
         CraftingRecipe craftingRecipe = Recipes.getRecipe(recipe.getKey());
 
-        if (!(craftingRecipe instanceof ShapedCraftingRecipe)) {
+        if (!(craftingRecipe instanceof ShapedCraftingRecipe shapedCraftingRecipe)) {
             return;
         }
 
-        ShapedCraftingRecipe shapedCraftingRecipe = (ShapedCraftingRecipe) craftingRecipe;
-
         for (int i = 0; i < 9; i++) {
             ItemStack itemStack = event.getInventory().getMatrix()[i];
             TestableItem part = shapedCraftingRecipe.getParts().get(i);
@@ -127,20 +165,16 @@ public class ShapedRecipeListener implements Listener {
      */
     @EventHandler
     public void preventUsingComplexPartInEcoRecipe(@NotNull final CraftItemEvent event) {
-        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
             return;
         }
 
-        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
-
         CraftingRecipe craftingRecipe = Recipes.getRecipe(recipe.getKey());
 
-        if (!(craftingRecipe instanceof ShapedCraftingRecipe)) {
+        if (!(craftingRecipe instanceof ShapedCraftingRecipe shapedCraftingRecipe)) {
             return;
         }
 
-        ShapedCraftingRecipe shapedCraftingRecipe = (ShapedCraftingRecipe) craftingRecipe;
-
         for (int i = 0; i < 9; i++) {
             ItemStack itemStack = event.getInventory().getMatrix()[i];
             TestableItem part = shapedCraftingRecipe.getParts().get(i);
@@ -162,12 +196,10 @@ public class ShapedRecipeListener implements Listener {
      */
     @EventHandler
     public void preventUsingComplexPartInVanillaRecipe(@NotNull final PrepareItemCraftEvent event) {
-        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
             return;
         }
 
-        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
-
         if (EcoPlugin.LOADED_ECO_PLUGINS.contains(recipe.getKey().getNamespace())) {
             return;
         }
@@ -187,12 +219,10 @@ public class ShapedRecipeListener implements Listener {
      */
     @EventHandler
     public void preventUsingComplexPartInVanillaRecipe(@NotNull final CraftItemEvent event) {
-        if (!(event.getRecipe() instanceof ShapedRecipe)) {
+        if (!(event.getRecipe() instanceof ShapedRecipe recipe)) {
             return;
         }
 
-        ShapedRecipe recipe = (ShapedRecipe) event.getRecipe();
-
         if (EcoPlugin.LOADED_ECO_PLUGINS.contains(recipe.getKey().getNamespace())) {
             return;
         }

eco-core/core-plugin/src/main/resources/data.json

@@ -0,0 +1,3 @@
+{
+
+}

eco-core/core-plugin/src/main/resources/lang.yml

@@ -0,0 +1 @@
+multiple-in-craft: '&l&c! &fThis recipe requires &a%amount%&f of this item.'

gradle.properties

@@ -1,2 +1,2 @@
-version = 5.4.1
+version = 5.5.0
 plugin-name = eco