Moved away from ProtocolLib

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

@@ -13,27 +13,30 @@ import java.util.Collections;
 
 /**
  * Wrapper class for ProtocolLib packets.
+ *
+ * @deprecated ProtocolLib is no longer used by eco. Use {@link com.willfp.eco.core.packet.PacketListener} instead.
  */
+@Deprecated(since = "6.51.0")
 public abstract class AbstractPacketAdapter extends PacketAdapter {
     /**
-     * The packet type to listen for.
+     * The handle type to listen for.
      */
     private final PacketType type;
 
     /**
-     * Whether the packet adapter should be registered after the server has loaded.
+     * Whether the handle adapter should be registered after the server has loaded.
      * <p>
      * Useful for monitor priority adapters that <b>must</b> be ran last.
      */
     private final boolean postLoad;
 
     /**
-     * Create a new packet adapter for a specified plugin and type.
+     * Create a new handle adapter for a specified plugin and type.
      *
      * @param plugin   The plugin that ProtocolLib should mark as the owner.
      * @param type     The {@link PacketType} to listen for.
-     * @param priority The priority at which the adapter should be ran on packet send/receive.
+     * @param priority The priority at which the adapter should be ran on handle send/receive.
-     * @param postLoad If the packet adapter should be registered after the server has loaded.
+     * @param postLoad If the handle adapter should be registered after the server has loaded.
      */
     protected AbstractPacketAdapter(@NotNull final EcoPlugin plugin,
                                     @NotNull final PacketType type,
@@ -45,11 +48,11 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * Create a new packet adapter for a specified plugin and type.
+     * Create a new handle adapter for a specified plugin and type.
      *
      * @param plugin   The plugin that ProtocolLib should mark as the owner.
      * @param type     The {@link PacketType} to listen for.
-     * @param postLoad If the packet adapter should be registered after the server has loaded.
+     * @param postLoad If the handle adapter should be registered after the server has loaded.
      */
     protected AbstractPacketAdapter(@NotNull final EcoPlugin plugin,
                                     @NotNull final PacketType type,
@@ -58,9 +61,9 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * The code that should be executed once the packet has been received.
+     * The code that should be executed once the handle has been received.
      *
-     * @param packet The packet.
+     * @param packet The handle.
      * @param player The player.
      * @param event  The event.
      */
@@ -71,9 +74,9 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * THe code that should be executed once the packet has been sent.
+     * THe code that should be executed once the handle has been sent.
      *
-     * @param packet The packet.
+     * @param packet The handle.
      * @param player The player.
      * @param event  The event.
      */
@@ -84,7 +87,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * Boilerplate to assert that the packet is of the specified type.
+     * Boilerplate to assert that the handle is of the specified type.
      *
      * @param event The ProtocolLib event.
      */
@@ -102,7 +105,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * Boilerplate to assert that the packet is of the specified type.
+     * Boilerplate to assert that the handle is of the specified type.
      *
      * @param event The ProtocolLib event.
      */
@@ -125,7 +128,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * Register the packet adapter with ProtocolLib.
+     * Register the handle adapter with ProtocolLib.
      */
     public final void register() {
         if (!ProtocolLibrary.getProtocolManager().getPacketListeners().contains(this)) {
@@ -134,7 +137,7 @@ public abstract class AbstractPacketAdapter extends PacketAdapter {
     }
 
     /**
-     * Get if the packet adapter should be loaded last.
+     * Get if the handle adapter should be loaded last.
      *
      * @return If post load.
      */

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

@@ -13,6 +13,7 @@ import com.willfp.eco.core.factory.MetadataValueFactory;
 import com.willfp.eco.core.factory.NamespacedKeyFactory;
 import com.willfp.eco.core.factory.RunnableFactory;
 import com.willfp.eco.core.integrations.IntegrationLoader;
+import com.willfp.eco.core.packet.PacketListener;
 import com.willfp.eco.core.proxy.ProxyFactory;
 import com.willfp.eco.core.scheduling.Scheduler;
 import com.willfp.eco.core.web.UpdateChecker;
@@ -52,7 +53,7 @@ import java.util.stream.Collectors;
  * <b>IMPORTANT: When reloading a plugin, all runnables / tasks will
  * be cancelled.</b>
  */
-@SuppressWarnings("unused")
+@SuppressWarnings({"unused", "DeprecatedIsStillUsed"})
 public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
     /**
      * The polymart resource ID of the plugin.
@@ -422,13 +423,16 @@ public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
 
         Prerequisite.update();
 
+        if (Prerequisite.HAS_PROTOCOLLIB.isMet()) {
             this.loadPacketAdapters().forEach(abstractPacketAdapter -> {
                 if (!abstractPacketAdapter.isPostLoad()) {
                     abstractPacketAdapter.register();
                 }
             });
+        }
 
         this.loadListeners().forEach(listener -> this.getEventManager().registerListener(listener));
+        this.loadPacketListeners().forEach(listener -> this.getEventManager().registerPacketListener(listener));
 
         this.loadPluginCommands().forEach(PluginCommand::register);
 
@@ -683,16 +687,27 @@ public abstract class EcoPlugin extends JavaPlugin implements PluginLike {
     }
 
     /**
-     * ProtocolLib packet adapters to be registered.
+     * ProtocolLib handle adapters to be registered.
      * <p>
      * If the plugin does not require ProtocolLib this can be left empty.
      *
-     * @return A list of packet adapters.
+     * @return A list of handle adapters.
+     * @deprecated Use {@link #loadPacketListeners()} instead.
      */
+    @Deprecated(since = "6.51.0")
     protected List<AbstractPacketAdapter> loadPacketAdapters() {
         return new ArrayList<>();
     }
 
+    /**
+     * Packet Listeners to be registered.
+     *
+     * @return A list of handle listeners.
+     */
+    protected List<PacketListener> loadPacketListeners() {
+        return new ArrayList<>();
+    }
+
     /**
      * All listeners to be registered.
      *

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

@@ -1,5 +1,6 @@
 package com.willfp.eco.core.events;
 
+import com.willfp.eco.core.packet.PacketListener;
 import org.bukkit.event.Listener;
 import org.jetbrains.annotations.NotNull;
 
@@ -25,4 +26,11 @@ public interface EventManager {
      * Unregister all listeners associated with the plugin.
      */
     void unregisterAllListeners();
+
+    /**
+     * Register a packet listener.
+     *
+     * @param listener The listener.
+     */
+    void registerPacketListener(@NotNull PacketListener listener);
 }

eco-api/src/main/java/com/willfp/eco/core/packet/Packet.java

@@ -0,0 +1,12 @@
+package com.willfp.eco.core.packet;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Represents a packet.
+ *
+ * @param handle The NMS handle.
+ */
+public record Packet(@NotNull Object handle) {
+
+}

eco-api/src/main/java/com/willfp/eco/core/packet/PacketEvent.java

@@ -0,0 +1,67 @@
+package com.willfp.eco.core.packet;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Represents a handle being sent or received.
+ */
+public class PacketEvent implements Cancellable {
+    /**
+     * The handle.
+     */
+    private final Packet packet;
+
+    /**
+     * The player.
+     */
+    private final Player player;
+
+    /**
+     * If the event should be cancelled.
+     */
+    private boolean cancelled = false;
+
+    /**
+     * Create a new handle event.
+     *
+     * @param packet The handle.
+     * @param player The player.
+     */
+    public PacketEvent(@NotNull final Packet packet,
+                       @NotNull final Player player) {
+        this.packet = packet;
+        this.player = player;
+    }
+
+    /**
+     * Get the NMS handle.
+     *
+     * @return The handle.
+     */
+    @NotNull
+    public Packet getPacket() {
+        return packet;
+    }
+
+    /**
+     * Get the player.
+     *
+     * @return The player.
+     */
+    @NotNull
+    public Player getPlayer() {
+        return player;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(final boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/packet/PacketListener.java

@@ -0,0 +1,35 @@
+package com.willfp.eco.core.packet;
+
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * Listens to packets.
+ */
+public interface PacketListener {
+    /**
+     * Called when a handle is sent.
+     *
+     * @param event The event.
+     */
+    default void onSend(@NotNull final PacketEvent event) {
+        // Override when needed.
+    }
+
+    /**
+     * Called when a handle is received.
+     *
+     * @param event The event.
+     */
+    default void onReceive(@NotNull final PacketEvent event) {
+        // Override when needed.
+    }
+
+    /**
+     * Get the priority of the listener.
+     *
+     * @return The priority.
+     */
+    default PacketPriority getPriority() {
+        return PacketPriority.NORMAL;
+    }
+}

eco-api/src/main/java/com/willfp/eco/core/packet/PacketPriority.java

@@ -0,0 +1,31 @@
+package com.willfp.eco.core.packet;
+
+/**
+ * The priority (order) of packet listeners.
+ */
+public enum PacketPriority {
+    /**
+     * Ran first.
+     */
+    LOWEST,
+
+    /**
+     * Ran second.
+     */
+    LOW,
+
+    /**
+     * Ran third.
+     */
+    NORMAL,
+
+    /**
+     * Ran fourth.
+     */
+    HIGH,
+
+    /**
+     * Ran last.
+     */
+    HIGHEST
+}

eco-core/core-backend/src/main/kotlin/com/willfp/eco/internal/events/EcoEventManager.kt

@@ -2,11 +2,38 @@ package com.willfp.eco.internal.events
 
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.events.EventManager
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.core.packet.PacketPriority
 import org.bukkit.Bukkit
 import org.bukkit.event.HandlerList
 import org.bukkit.event.Listener
 
-class EcoEventManager (private val plugin: EcoPlugin) : EventManager {
+
+private class RegisteredPacketListener(
+    val plugin: EcoPlugin,
+    val listener: PacketListener
+)
+
+private val listeners = mutableMapOf<PacketPriority, MutableList<RegisteredPacketListener>>()
+
+fun PacketEvent.handleSend() {
+    for (priority in PacketPriority.values()) {
+        for (listener in listeners[priority] ?: continue) {
+            listener.listener.onSend(this)
+        }
+    }
+}
+
+fun PacketEvent.handleReceive() {
+    for (priority in PacketPriority.values()) {
+        for (listener in listeners[priority] ?: continue) {
+            listener.listener.onReceive(this)
+        }
+    }
+}
+
+class EcoEventManager(private val plugin: EcoPlugin) : EventManager {
     override fun registerListener(listener: Listener) {
         Bukkit.getPluginManager().registerEvents(listener, plugin)
     }
@@ -17,5 +44,17 @@ class EcoEventManager (private val plugin: EcoPlugin) : EventManager {
 
     override fun unregisterAllListeners() {
         HandlerList.unregisterAll(plugin)
+        for (value in listeners.values) {
+            value.removeIf { it.plugin == plugin }
+        }
+    }
+
+    override fun registerPacketListener(listener: PacketListener) {
+        listeners.getOrPut(listener.priority) { mutableListOf() }.add(
+            RegisteredPacketListener(
+                plugin,
+                listener
+            )
+        )
     }
 }

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

@@ -0,0 +1,48 @@
+package com.willfp.eco.internal.spigot.proxy.common.packet
+
+import com.willfp.eco.core.packet.Packet
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.internal.events.handleReceive
+import com.willfp.eco.internal.events.handleSend
+import io.netty.channel.ChannelDuplexHandler
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.ChannelPromise
+import org.bukkit.Bukkit
+import java.util.UUID
+
+class EcoChannelDuplexHandler(
+    private val uuid: UUID
+) : ChannelDuplexHandler() {
+
+    override fun channelRead(ctx: ChannelHandlerContext, msg: Any) {
+        val player = Bukkit.getPlayer(uuid)
+
+        if (player != null) {
+            val event = PacketEvent(Packet(msg), player)
+
+            event.handleReceive()
+
+            if (!event.isCancelled) {
+                super.channelRead(ctx, msg)
+            }
+        } else {
+            super.channelRead(ctx, msg)
+        }
+    }
+
+    override fun write(ctx: ChannelHandlerContext, msg: Any, promise: ChannelPromise) {
+        val player = Bukkit.getPlayer(uuid)
+
+        if (player != null) {
+            val event = PacketEvent(Packet(msg), player)
+
+            event.handleSend()
+
+            if (!event.isCancelled) {
+                super.channelRead(ctx, msg)
+            }
+        } else {
+            super.write(ctx, msg, promise)
+        }
+    }
+}

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

@@ -0,0 +1,32 @@
+package com.willfp.eco.internal.spigot.proxy.common.packet.display
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
+import net.minecraft.network.protocol.game.ClientboundPlaceGhostRecipePacket
+import net.minecraft.resources.ResourceLocation
+
+class PacketAutoRecipe(
+    private val plugin: EcoPlugin
+) : PacketListener {
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundPlaceGhostRecipePacket ?: return
+
+        if (!plugin.configYml.getBool("displayed-recipes")) {
+            return
+        }
+
+        if (!EcoPlugin.getPluginNames().contains(packet.recipe.namespace)) {
+            return
+        }
+
+        if (packet.recipe.path.contains("_displayed")) {
+            return
+        }
+
+        val fKey = packet.javaClass.getDeclaredField("b")
+        fKey.isAccessible = true
+        val key = fKey[packet] as ResourceLocation
+        fKey[packet] = ResourceLocation(key.namespace, key.path + "_displayed")
+    }
+}

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

@@ -0,0 +1,17 @@
+package com.willfp.eco.internal.spigot.proxy.common.packet.display
+
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.DisplayFrame
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.lastDisplayFrame
+import net.minecraft.network.protocol.game.ServerboundSetCarriedItemPacket
+
+object PacketHeldItemSlot : PacketListener {
+    override fun onReceive(event: PacketEvent) {
+        if (event.packet.handle !is ServerboundSetCarriedItemPacket) {
+            return
+        }
+
+        event.player.lastDisplayFrame = DisplayFrame.EMPTY
+    }
+}

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

@@ -0,0 +1,35 @@
+package com.willfp.eco.internal.spigot.proxy.common.packet.display
+
+import com.willfp.eco.core.display.Display
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.common.asBukkitStack
+import com.willfp.eco.internal.spigot.proxy.common.asNMSStack
+import net.minecraft.nbt.CompoundTag
+import net.minecraft.network.protocol.game.ClientboundMerchantOffersPacket
+import net.minecraft.world.item.ItemStack
+import net.minecraft.world.item.trading.MerchantOffer
+
+object PacketOpenWindowMerchant : PacketListener {
+    private val field = ClientboundMerchantOffersPacket::class.java.getDeclaredField("b").apply { isAccessible = true }
+
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundMerchantOffersPacket ?: return
+
+        val offers = mutableListOf<MerchantOffer>()
+
+        for (offer in packet.offers) {
+            val nbt = offer.createTag()
+            for (tag in arrayOf("buy", "buyB", "sell")) {
+                val nms = ItemStack.of(nbt.getCompound(tag))
+                val displayed = Display.display(nms.asBukkitStack(), event.player)
+                val itemNBT = displayed.asNMSStack().save(CompoundTag())
+                nbt.put(tag, itemNBT)
+            }
+
+            offers += MerchantOffer(nbt)
+        }
+
+        field.set(packet, offers)
+    }
+}

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

@@ -0,0 +1,19 @@
+package com.willfp.eco.internal.spigot.proxy.common.packet.display
+
+import com.willfp.eco.core.display.Display
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.common.asBukkitStack
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.DisplayFrame
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.lastDisplayFrame
+import net.minecraft.network.protocol.game.ServerboundSetCreativeModeSlotPacket
+
+object PacketSetCreativeSlot : PacketListener {
+    override fun onReceive(event: PacketEvent) {
+        val packet = event.packet.handle as? ServerboundSetCreativeModeSlotPacket ?: return
+
+        Display.revert(packet.item.asBukkitStack())
+
+        event.player.lastDisplayFrame = DisplayFrame.EMPTY
+    }
+}

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

@@ -0,0 +1,19 @@
+package com.willfp.eco.internal.spigot.proxy.common.packet.display
+
+import com.willfp.eco.core.display.Display
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.common.asBukkitStack
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.DisplayFrame
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.lastDisplayFrame
+import net.minecraft.network.protocol.game.ClientboundContainerSetSlotPacket
+
+object PacketSetSlot : PacketListener {
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundContainerSetSlotPacket ?: return
+
+        Display.display(packet.item.asBukkitStack(), event.player)
+
+        event.player.lastDisplayFrame = DisplayFrame.EMPTY
+    }
+}

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

@@ -1,39 +1,37 @@
-package com.willfp.eco.internal.spigot.display
+package com.willfp.eco.internal.spigot.proxy.common.packet.display
 
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.willfp.eco.core.AbstractPacketAdapter
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.display.Display
 import com.willfp.eco.core.items.HashedItem
-import com.willfp.eco.internal.spigot.display.frame.DisplayFrame
+import com.willfp.eco.core.packet.PacketEvent
-import com.willfp.eco.internal.spigot.display.frame.lastDisplayFrame
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.common.asBukkitStack
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.DisplayFrame
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.lastDisplayFrame
+import net.minecraft.network.protocol.game.ClientboundContainerSetContentPacket
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
+import java.util.UUID
 import java.util.concurrent.ConcurrentHashMap
 
-class PacketWindowItems(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, PacketType.Play.Server.WINDOW_ITEMS, false) {
+class PacketWindowItems(
-    private val lastKnownWindowIDs = ConcurrentHashMap<String, Int>()
+    private val plugin: EcoPlugin
+) : PacketListener {
+    private val lastKnownWindowIDs = ConcurrentHashMap<UUID, Int>()
 
-    override fun onSend(
+    private val field = ClientboundContainerSetContentPacket::class.java.getDeclaredField("c")
-        packet: PacketContainer,
+        .apply { isAccessible = true }
-        player: Player,
-        event: PacketEvent
-    ) {
-        packet.itemModifier.modify(0) {
-            Display.display(
-                it, player
-            )
-        }
 
-        val windowId = packet.integers.read(0)
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundContainerSetContentPacket ?: return
+        val player = event.player
 
-        // Using name because UUID is unreliable with ProtocolLib players.
+        Display.display(packet.carriedItem.asBukkitStack(), player)
-        val name = player.name
 
-        val lastKnownID = lastKnownWindowIDs[name]
+        val windowId = packet.containerId
-        lastKnownWindowIDs[name] = windowId
+
+        val lastKnownID = lastKnownWindowIDs[player.uniqueId]
+        lastKnownWindowIDs[player.uniqueId] = windowId
 
         // If there is any change in window ID at any point,
         // Remove the last display frame to prevent any potential conflicts.
@@ -43,17 +41,20 @@ class PacketWindowItems(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, Packe
             player.lastDisplayFrame = DisplayFrame.EMPTY
         }
 
-        val itemStacks = packet.itemListModifier.read(0) ?: return
+        val itemStacks = packet.items.map { it.asBukkitStack() }
 
-        packet.itemListModifier.write(0, modifyWindowItems(itemStacks, windowId, player))
+        val newItems = modifyWindowItems(itemStacks.toMutableList(), windowId, player)
+
+        field.set(packet, newItems)
     }
 
+
     private fun modifyWindowItems(
         itemStacks: MutableList<ItemStack>,
         windowId: Int,
         player: Player
     ): MutableList<ItemStack> {
-        if (this.getPlugin().configYml.getBool("use-display-frame") && windowId == 0) {
+        if (plugin.configYml.getBool("use-display-frame") && windowId == 0) {
             val frameMap = mutableMapOf<Byte, HashedItem>()
 
             for (index in itemStacks.indices) {

eco-core/core-nms/nms-common/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/common/packet/display/frame/DisplayFrame.kt

@@ -1,6 +1,5 @@
-package com.willfp.eco.internal.spigot.display.frame
+package com.willfp.eco.internal.spigot.proxy.common.packet.display.frame
 
-import com.comphenix.protocol.injector.temporary.TemporaryPlayer
 import com.willfp.eco.core.items.HashedItem
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
@@ -33,19 +32,9 @@ private val frames = ConcurrentHashMap<UUID, DisplayFrame>()
 
 var Player.lastDisplayFrame: DisplayFrame
     get() {
-        // ProtocolLib fix
-        if (this is TemporaryPlayer) {
-            return DisplayFrame.EMPTY
-        }
-
         return frames[this.uniqueId] ?: DisplayFrame.EMPTY
     }
     set(value) {
-        // ProtocolLib fix
-        if (this is TemporaryPlayer) {
-            return
-        }
-
         frames[this.uniqueId] = value
     }
 

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

@@ -1,15 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_17_R1
-
-import com.willfp.eco.internal.spigot.proxy.AutoCraftProxy
-import net.minecraft.network.protocol.game.ClientboundPlaceGhostRecipePacket
-import net.minecraft.resources.ResourceLocation
-
-class AutoCraft : AutoCraftProxy {
-    override fun modifyPacket(packet: Any) {
-        val recipePacket = packet as ClientboundPlaceGhostRecipePacket
-        val fKey = recipePacket.javaClass.getDeclaredField("b")
-        fKey.isAccessible = true
-        val key = fKey[recipePacket] as ResourceLocation
-        fKey[recipePacket] = ResourceLocation(key.namespace, key.path + "_displayed")
-    }
-}

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

@@ -1,5 +1,6 @@
 package com.willfp.eco.internal.spigot.proxy.v1_17_R1
 
+import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
 import com.willfp.eco.internal.spigot.proxy.common.toResourceLocation
@@ -27,7 +28,7 @@ import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
-    override fun init() {
+    override fun init(plugin: EcoPlugin) {
         CommonsProvider.setIfNeeded(CommonsProviderImpl)
     }
 
@@ -60,7 +61,7 @@ class CommonsInitializer : CommonsInitializerProxy {
         }
 
         override fun asBukkitStack(itemStack: net.minecraft.world.item.ItemStack): ItemStack {
-            return CraftItemStack.asBukkitCopy(itemStack)
+            return CraftItemStack.asCraftMirror(itemStack)
         }
 
         override fun mergeIfNeeded(itemStack: ItemStack, nmsStack: net.minecraft.world.item.ItemStack) {

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

@@ -0,0 +1,68 @@
+package com.willfp.eco.internal.spigot.proxy.v1_17_R1
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
+import com.willfp.eco.internal.spigot.proxy.common.packet.EcoChannelDuplexHandler
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketAutoRecipe
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketHeldItemSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketOpenWindowMerchant
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetCreativeSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketWindowItems
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.clearFrames
+import com.willfp.eco.internal.spigot.proxy.v1_17_R1.display.PacketChat
+import net.minecraft.network.protocol.Packet
+import org.bukkit.craftbukkit.v1_17_R1.entity.CraftPlayer
+import org.bukkit.entity.Player
+
+class PacketHandler : PacketHandlerProxy {
+    override fun addPlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        player.handle.connection.connection.channel.pipeline()
+            .addBefore("eco_packet_handler", player.name, EcoChannelDuplexHandler(player.uniqueId))
+    }
+
+    override fun removePlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        val channel = player.handle.connection.connection.channel
+
+        channel.eventLoop().submit {
+            channel.pipeline().remove(player.name)
+        }
+    }
+
+    override fun sendPacket(player: Player, packet: Any) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        if (packet !is Packet<*>) {
+            return
+        }
+
+        player.handle.connection.send(packet)
+    }
+
+    override fun clearDisplayFrames() {
+        clearFrames()
+    }
+
+    override fun getPacketListeners(plugin: EcoPlugin): List<PacketListener> {
+        return listOf(
+            PacketAutoRecipe(plugin),
+            PacketHeldItemSlot,
+            PacketOpenWindowMerchant,
+            PacketSetCreativeSlot,
+            PacketSetSlot,
+            PacketWindowItems(plugin),
+            PacketChat
+        )
+    }
+}

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

@@ -1,41 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_17_R1
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.VillagerTradeProxy
-import net.minecraft.nbt.CompoundTag
-import net.minecraft.world.item.ItemStack
-import net.minecraft.world.item.trading.MerchantOffer
-import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack
-import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftMerchantRecipe
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-import java.lang.reflect.Field
-
-class VillagerTrade : VillagerTradeProxy {
-    private val handle: Field = CraftMerchantRecipe::class.java.getDeclaredField("handle")
-
-    override fun displayTrade(
-        recipe: MerchantRecipe,
-        player: Player
-    ): MerchantRecipe {
-        recipe as CraftMerchantRecipe
-
-        val nbt = getHandle(recipe).createTag()
-        for (tag in arrayOf("buy", "buyB", "sell")) {
-            val nms = ItemStack.of(nbt.getCompound(tag))
-            val displayed = Display.display(CraftItemStack.asBukkitCopy(nms), player)
-            val itemNBT = CraftItemStack.asNMSCopy(displayed).save(CompoundTag())
-            nbt.put(tag, itemNBT)
-        }
-
-        return CraftMerchantRecipe(MerchantOffer(nbt))
-    }
-
-    private fun getHandle(recipe: CraftMerchantRecipe): MerchantOffer {
-        return handle[recipe] as MerchantOffer
-    }
-
-    init {
-        handle.isAccessible = true
-    }
-}

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

@@ -1,7 +1,8 @@
-package com.willfp.eco.internal.spigot.proxy.v1_17_R1
+package com.willfp.eco.internal.spigot.proxy.v1_17_R1.display
 
 import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.ChatComponentProxy
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
 import net.kyori.adventure.nbt.api.BinaryTagHolder
 import net.kyori.adventure.text.BuildableComponent
 import net.kyori.adventure.text.Component
@@ -9,20 +10,28 @@ import net.kyori.adventure.text.TranslatableComponent
 import net.kyori.adventure.text.event.HoverEvent
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
 import net.minecraft.nbt.TagParser
+import net.minecraft.network.protocol.game.ClientboundChatPacket
 import org.bukkit.Material
 import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 
-@Suppress("UNCHECKED_CAST")
+object PacketChat : PacketListener {
-class ChatComponent : ChatComponentProxy {
     private val gsonComponentSerializer = GsonComponentSerializer.gson()
 
-    override fun modifyComponent(obj: Any, player: Player): Any {
+    private val field = ClientboundChatPacket::class.java.declaredFields
-        if (obj !is net.minecraft.network.chat.Component) {
+        .first { it.type == net.minecraft.network.chat.Component::class.java }
-            return obj
+        .apply { isAccessible = true }
+
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundChatPacket ?: return
+
+        val newMessage = modifyComponent(packet.message, event.player)
+
+        field.set(packet, newMessage)
     }
 
+    private fun modifyComponent(obj: net.minecraft.network.chat.Component, player: Player): Any {
         val component = gsonComponentSerializer.deserialize(
             net.minecraft.network.chat.Component.Serializer.toJson(
                 obj
@@ -53,6 +62,7 @@ class ChatComponent : ChatComponentProxy {
         }
         component = component.children(children)
 
+        @Suppress("UNCHECKED_CAST")
         val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
 
         val showItem = hoverEvent.value()

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

@@ -1,15 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_18_R1
-
-import com.willfp.eco.internal.spigot.proxy.AutoCraftProxy
-import net.minecraft.network.protocol.game.ClientboundPlaceGhostRecipePacket
-import net.minecraft.resources.ResourceLocation
-
-class AutoCraft : AutoCraftProxy {
-    override fun modifyPacket(packet: Any) {
-        val recipePacket = packet as ClientboundPlaceGhostRecipePacket
-        val fKey = recipePacket.javaClass.getDeclaredField("b")
-        fKey.isAccessible = true
-        val key = fKey[recipePacket] as ResourceLocation
-        fKey[recipePacket] = ResourceLocation(key.namespace, key.path + "_displayed")
-    }
-}

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

@@ -1,5 +1,6 @@
 package com.willfp.eco.internal.spigot.proxy.v1_18_R1
 
+import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
 import com.willfp.eco.internal.spigot.proxy.common.toResourceLocation
@@ -27,7 +28,7 @@ import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
-    override fun init() {
+    override fun init(plugin: EcoPlugin) {
         CommonsProvider.setIfNeeded(CommonsProviderImpl)
     }
 
@@ -60,7 +61,7 @@ class CommonsInitializer : CommonsInitializerProxy {
         }
 
         override fun asBukkitStack(itemStack: net.minecraft.world.item.ItemStack): ItemStack {
-            return CraftItemStack.asBukkitCopy(itemStack)
+            return CraftItemStack.asCraftMirror(itemStack)
         }
 
         override fun mergeIfNeeded(itemStack: ItemStack, nmsStack: net.minecraft.world.item.ItemStack) {

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

@@ -0,0 +1,68 @@
+package com.willfp.eco.internal.spigot.proxy.v1_18_R1
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
+import com.willfp.eco.internal.spigot.proxy.common.packet.EcoChannelDuplexHandler
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketAutoRecipe
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketHeldItemSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketOpenWindowMerchant
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetCreativeSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketWindowItems
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.clearFrames
+import com.willfp.eco.internal.spigot.proxy.v1_18_R1.display.PacketChat
+import net.minecraft.network.protocol.Packet
+import org.bukkit.craftbukkit.v1_18_R1.entity.CraftPlayer
+import org.bukkit.entity.Player
+
+class PacketHandler: PacketHandlerProxy {
+    override fun addPlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        player.handle.connection.connection.channel.pipeline()
+            .addBefore("eco_packet_handler", player.name, EcoChannelDuplexHandler(player.uniqueId))
+    }
+
+    override fun removePlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        val channel = player.handle.connection.connection.channel
+
+        channel.eventLoop().submit {
+            channel.pipeline().remove(player.name)
+        }
+    }
+
+    override fun sendPacket(player: Player, packet: Any) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        if (packet !is Packet<*>) {
+            return
+        }
+
+        player.handle.connection.send(packet)
+    }
+
+    override fun clearDisplayFrames() {
+        clearFrames()
+    }
+
+    override fun getPacketListeners(plugin: EcoPlugin): List<PacketListener> {
+        return listOf(
+            PacketAutoRecipe(plugin),
+            PacketHeldItemSlot,
+            PacketOpenWindowMerchant,
+            PacketSetCreativeSlot,
+            PacketSetSlot,
+            PacketWindowItems(plugin),
+            PacketChat
+        )
+    }
+}

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

@@ -1,41 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_18_R1
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.VillagerTradeProxy
-import net.minecraft.nbt.CompoundTag
-import net.minecraft.world.item.ItemStack
-import net.minecraft.world.item.trading.MerchantOffer
-import org.bukkit.craftbukkit.v1_18_R1.inventory.CraftItemStack
-import org.bukkit.craftbukkit.v1_18_R1.inventory.CraftMerchantRecipe
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-import java.lang.reflect.Field
-
-class VillagerTrade : VillagerTradeProxy {
-    private val handle: Field = CraftMerchantRecipe::class.java.getDeclaredField("handle")
-
-    override fun displayTrade(
-        recipe: MerchantRecipe,
-        player: Player
-    ): MerchantRecipe {
-        recipe as CraftMerchantRecipe
-
-        val nbt = getHandle(recipe).createTag()
-        for (tag in arrayOf("buy", "buyB", "sell")) {
-            val nms = ItemStack.of(nbt.getCompound(tag))
-            val displayed = Display.display(CraftItemStack.asBukkitCopy(nms), player)
-            val itemNBT = CraftItemStack.asNMSCopy(displayed).save(CompoundTag())
-            nbt.put(tag, itemNBT)
-        }
-
-        return CraftMerchantRecipe(MerchantOffer(nbt))
-    }
-
-    private fun getHandle(recipe: CraftMerchantRecipe): MerchantOffer {
-        return handle[recipe] as MerchantOffer
-    }
-
-    init {
-        handle.isAccessible = true
-    }
-}

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

@@ -1,7 +1,8 @@
-package com.willfp.eco.internal.spigot.proxy.v1_18_R1
+package com.willfp.eco.internal.spigot.proxy.v1_18_R1.display
 
 import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.ChatComponentProxy
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
 import net.kyori.adventure.nbt.api.BinaryTagHolder
 import net.kyori.adventure.text.BuildableComponent
 import net.kyori.adventure.text.Component
@@ -9,20 +10,28 @@ import net.kyori.adventure.text.TranslatableComponent
 import net.kyori.adventure.text.event.HoverEvent
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
 import net.minecraft.nbt.TagParser
+import net.minecraft.network.protocol.game.ClientboundChatPacket
 import org.bukkit.Material
 import org.bukkit.craftbukkit.v1_18_R1.inventory.CraftItemStack
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 
-@Suppress("UNCHECKED_CAST")
+object PacketChat : PacketListener {
-class ChatComponent : ChatComponentProxy {
     private val gsonComponentSerializer = GsonComponentSerializer.gson()
 
-    override fun modifyComponent(obj: Any, player: Player): Any {
+    private val field = ClientboundChatPacket::class.java.declaredFields
-        if (obj !is net.minecraft.network.chat.Component) {
+        .first { it.type == net.minecraft.network.chat.Component::class.java }
-            return obj
+        .apply { isAccessible = true }
+
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundChatPacket ?: return
+
+        val newMessage = modifyComponent(packet.message, event.player)
+
+        field.set(packet, newMessage)
     }
 
+    private fun modifyComponent(obj: net.minecraft.network.chat.Component, player: Player): Any {
         val component = gsonComponentSerializer.deserialize(
             net.minecraft.network.chat.Component.Serializer.toJson(
                 obj
@@ -53,6 +62,7 @@ class ChatComponent : ChatComponentProxy {
         }
         component = component.children(children)
 
+        @Suppress("UNCHECKED_CAST")
         val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
 
         val showItem = hoverEvent.value()

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

@@ -1,15 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_18_R2
-
-import com.willfp.eco.internal.spigot.proxy.AutoCraftProxy
-import net.minecraft.network.protocol.game.ClientboundPlaceGhostRecipePacket
-import net.minecraft.resources.ResourceLocation
-
-class AutoCraft : AutoCraftProxy {
-    override fun modifyPacket(packet: Any) {
-        val recipePacket = packet as ClientboundPlaceGhostRecipePacket
-        val fKey = recipePacket.javaClass.getDeclaredField("b")
-        fKey.isAccessible = true
-        val key = fKey[recipePacket] as ResourceLocation
-        fKey[recipePacket] = ResourceLocation(key.namespace, key.path + "_displayed")
-    }
-}

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

@@ -1,5 +1,6 @@
 package com.willfp.eco.internal.spigot.proxy.v1_18_R2
 
+import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
 import com.willfp.eco.internal.spigot.proxy.common.toResourceLocation
@@ -27,7 +28,7 @@ import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
-    override fun init() {
+    override fun init(plugin: EcoPlugin) {
         CommonsProvider.setIfNeeded(CommonsProviderImpl)
     }
 
@@ -60,7 +61,7 @@ class CommonsInitializer : CommonsInitializerProxy {
         }
 
         override fun asBukkitStack(itemStack: net.minecraft.world.item.ItemStack): ItemStack {
-            return CraftItemStack.asBukkitCopy(itemStack)
+            return CraftItemStack.asCraftMirror(itemStack)
         }
 
         override fun mergeIfNeeded(itemStack: ItemStack, nmsStack: net.minecraft.world.item.ItemStack) {

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

@@ -0,0 +1,68 @@
+package com.willfp.eco.internal.spigot.proxy.v1_18_R2
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
+import com.willfp.eco.internal.spigot.proxy.common.packet.EcoChannelDuplexHandler
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketAutoRecipe
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketHeldItemSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketOpenWindowMerchant
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetCreativeSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketWindowItems
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.clearFrames
+import com.willfp.eco.internal.spigot.proxy.v1_18_R2.display.PacketChat
+import net.minecraft.network.protocol.Packet
+import org.bukkit.craftbukkit.v1_18_R2.entity.CraftPlayer
+import org.bukkit.entity.Player
+
+class PacketHandler: PacketHandlerProxy {
+    override fun addPlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        player.handle.connection.connection.channel.pipeline()
+            .addBefore("eco_packet_handler", player.name, EcoChannelDuplexHandler(player.uniqueId))
+    }
+
+    override fun removePlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        val channel = player.handle.connection.connection.channel
+
+        channel.eventLoop().submit {
+            channel.pipeline().remove(player.name)
+        }
+    }
+
+    override fun sendPacket(player: Player, packet: Any) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        if (packet !is Packet<*>) {
+            return
+        }
+
+        player.handle.connection.send(packet)
+    }
+
+    override fun clearDisplayFrames() {
+        clearFrames()
+    }
+
+    override fun getPacketListeners(plugin: EcoPlugin): List<PacketListener> {
+        return listOf(
+            PacketAutoRecipe(plugin),
+            PacketHeldItemSlot,
+            PacketOpenWindowMerchant,
+            PacketSetCreativeSlot,
+            PacketSetSlot,
+            PacketWindowItems(plugin),
+            PacketChat
+        )
+    }
+}

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

@@ -1,41 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_18_R2
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.VillagerTradeProxy
-import net.minecraft.nbt.CompoundTag
-import net.minecraft.world.item.ItemStack
-import net.minecraft.world.item.trading.MerchantOffer
-import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftItemStack
-import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftMerchantRecipe
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-import java.lang.reflect.Field
-
-class VillagerTrade : VillagerTradeProxy {
-    private val handle: Field = CraftMerchantRecipe::class.java.getDeclaredField("handle")
-
-    override fun displayTrade(
-        recipe: MerchantRecipe,
-        player: Player
-    ): MerchantRecipe {
-        recipe as CraftMerchantRecipe
-
-        val nbt = getHandle(recipe).createTag()
-        for (tag in arrayOf("buy", "buyB", "sell")) {
-            val nms = ItemStack.of(nbt.getCompound(tag))
-            val displayed = Display.display(CraftItemStack.asBukkitCopy(nms), player)
-            val itemNBT = CraftItemStack.asNMSCopy(displayed).save(CompoundTag())
-            nbt.put(tag, itemNBT)
-        }
-
-        return CraftMerchantRecipe(MerchantOffer(nbt))
-    }
-
-    private fun getHandle(recipe: CraftMerchantRecipe): MerchantOffer {
-        return handle[recipe] as MerchantOffer
-    }
-
-    init {
-        handle.isAccessible = true
-    }
-}

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

@@ -1,7 +1,8 @@
-package com.willfp.eco.internal.spigot.proxy.v1_18_R2
+package com.willfp.eco.internal.spigot.proxy.v1_18_R2.display
 
 import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.ChatComponentProxy
+import com.willfp.eco.core.packet.PacketEvent
+import com.willfp.eco.core.packet.PacketListener
 import net.kyori.adventure.nbt.api.BinaryTagHolder
 import net.kyori.adventure.text.BuildableComponent
 import net.kyori.adventure.text.Component
@@ -9,20 +10,28 @@ import net.kyori.adventure.text.TranslatableComponent
 import net.kyori.adventure.text.event.HoverEvent
 import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
 import net.minecraft.nbt.TagParser
+import net.minecraft.network.protocol.game.ClientboundChatPacket
 import org.bukkit.Material
 import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftItemStack
 import org.bukkit.entity.Player
 import org.bukkit.inventory.ItemStack
 
-@Suppress("UNCHECKED_CAST")
+object PacketChat : PacketListener {
-class ChatComponent : ChatComponentProxy {
     private val gsonComponentSerializer = GsonComponentSerializer.gson()
 
-    override fun modifyComponent(obj: Any, player: Player): Any {
+    private val field = ClientboundChatPacket::class.java.declaredFields
-        if (obj !is net.minecraft.network.chat.Component) {
+        .first { it.type == net.minecraft.network.chat.Component::class.java }
-            return obj
+        .apply { isAccessible = true }
+
+    override fun onSend(event: PacketEvent) {
+        val packet = event.packet.handle as? ClientboundChatPacket ?: return
+
+        val newMessage = modifyComponent(packet.message, event.player)
+
+        field.set(packet, newMessage)
     }
 
+    private fun modifyComponent(obj: net.minecraft.network.chat.Component, player: Player): Any {
         val component = gsonComponentSerializer.deserialize(
             net.minecraft.network.chat.Component.Serializer.toJson(
                 obj
@@ -53,6 +62,7 @@ class ChatComponent : ChatComponentProxy {
         }
         component = component.children(children)
 
+        @Suppress("UNCHECKED_CAST")
         val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
 
         val showItem = hoverEvent.value()
@@ -62,7 +72,8 @@ class ChatComponent : ChatComponentProxy {
         }
 
         val newShowItem = showItem.nbt(
-            BinaryTagHolder.binaryTagHolder(
+            @Suppress("UnstableApiUsage", "DEPRECATION")
+            BinaryTagHolder.of(
                 CraftItemStack.asNMSCopy(
                     Display.display(
                         CraftItemStack.asBukkitCopy(

eco-core/core-nms/v1_19_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R1/AutoCraft.kt

@@ -1,15 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_19_R1
-
-import com.willfp.eco.internal.spigot.proxy.AutoCraftProxy
-import net.minecraft.network.protocol.game.ClientboundPlaceGhostRecipePacket
-import net.minecraft.resources.ResourceLocation
-
-class AutoCraft : AutoCraftProxy {
-    override fun modifyPacket(packet: Any) {
-        val recipePacket = packet as ClientboundPlaceGhostRecipePacket
-        val fKey = recipePacket.javaClass.getDeclaredField("b")
-        fKey.isAccessible = true
-        val key = fKey[recipePacket] as ResourceLocation
-        fKey[recipePacket] = ResourceLocation(key.namespace, key.path + "_displayed")
-    }
-}

eco-core/core-nms/v1_19_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R1/ChatComponent.kt

@@ -1,93 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_19_R1
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.ChatComponentProxy
-import net.kyori.adventure.nbt.api.BinaryTagHolder
-import net.kyori.adventure.text.BuildableComponent
-import net.kyori.adventure.text.Component
-import net.kyori.adventure.text.TranslatableComponent
-import net.kyori.adventure.text.event.HoverEvent
-import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
-import net.minecraft.nbt.TagParser
-import org.bukkit.Material
-import org.bukkit.craftbukkit.v1_19_R1.inventory.CraftItemStack
-import org.bukkit.entity.Player
-import org.bukkit.inventory.ItemStack
-
-@Suppress("UNCHECKED_CAST")
-class ChatComponent : ChatComponentProxy {
-    private val gsonComponentSerializer = GsonComponentSerializer.gson()
-
-    override fun modifyComponent(obj: Any, player: Player): Any {
-        if (obj !is net.minecraft.network.chat.Component) {
-            return obj
-        }
-
-        val component = gsonComponentSerializer.deserialize(
-            net.minecraft.network.chat.Component.Serializer.toJson(
-                obj
-            )
-        ).asComponent() as BuildableComponent<*, *>
-
-        val newComponent = modifyBaseComponent(component, player)
-
-        return net.minecraft.network.chat.Component.Serializer.fromJson(
-            gsonComponentSerializer.serialize(newComponent.asComponent())
-        ) ?: obj
-    }
-
-    private fun modifyBaseComponent(baseComponent: Component, player: Player): Component {
-        var component = baseComponent
-
-        if (component is TranslatableComponent) {
-            val args = mutableListOf<Component>()
-            for (arg in component.args()) {
-                args.add(modifyBaseComponent(arg, player))
-            }
-            component = component.args(args)
-        }
-
-        val children = mutableListOf<Component>()
-        for (child in component.children()) {
-            children.add(modifyBaseComponent(child, player))
-        }
-        component = component.children(children)
-
-        val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
-
-        val showItem = hoverEvent.value()
-
-        if (showItem !is HoverEvent.ShowItem) {
-            return component
-        }
-
-        val newShowItem = showItem.nbt(
-            BinaryTagHolder.binaryTagHolder(
-                CraftItemStack.asNMSCopy(
-                    Display.display(
-                        CraftItemStack.asBukkitCopy(
-                            CraftItemStack.asNMSCopy(
-                                ItemStack(
-                                    Material.matchMaterial(
-                                        showItem.item()
-                                            .toString()
-                                    ) ?: return component,
-                                    showItem.count()
-                                )
-                            ).apply {
-                                this.tag = TagParser.parseTag(
-                                    showItem.nbt()?.string() ?: return component
-                                ) ?: return component
-                            }
-                        ),
-                        player
-                    )
-                ).orCreateTag.toString()
-            )
-        )
-
-        val newHover = hoverEvent.value(newShowItem)
-        val style = component.style().hoverEvent(newHover)
-        return component.style(style)
-    }
-}

eco-core/core-nms/v1_19_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R1/CommonsInitializer.kt

@@ -1,5 +1,6 @@
 package com.willfp.eco.internal.spigot.proxy.v1_19_R1
 
+import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
 import com.willfp.eco.internal.spigot.proxy.common.toResourceLocation
@@ -27,7 +28,7 @@ import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
-    override fun init() {
+    override fun init(plugin: EcoPlugin) {
         CommonsProvider.setIfNeeded(CommonsProviderImpl)
     }
 
@@ -60,7 +61,7 @@ class CommonsInitializer : CommonsInitializerProxy {
         }
 
         override fun asBukkitStack(itemStack: net.minecraft.world.item.ItemStack): ItemStack {
-            return CraftItemStack.asBukkitCopy(itemStack)
+            return CraftItemStack.asCraftMirror(itemStack)
         }
 
         override fun mergeIfNeeded(itemStack: ItemStack, nmsStack: net.minecraft.world.item.ItemStack) {

eco-core/core-nms/v1_19_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R1/PacketHandler.kt

@@ -0,0 +1,66 @@
+package com.willfp.eco.internal.spigot.proxy.v1_19_R1
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
+import com.willfp.eco.internal.spigot.proxy.common.packet.EcoChannelDuplexHandler
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketAutoRecipe
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketHeldItemSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketOpenWindowMerchant
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetCreativeSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketWindowItems
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.clearFrames
+import net.minecraft.network.protocol.Packet
+import org.bukkit.craftbukkit.v1_19_R1.entity.CraftPlayer
+import org.bukkit.entity.Player
+
+class PacketHandler: PacketHandlerProxy {
+    override fun addPlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        player.handle.connection.connection.channel.pipeline()
+            .addBefore("eco_packet_handler", player.name, EcoChannelDuplexHandler(player.uniqueId))
+    }
+
+    override fun removePlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        val channel = player.handle.connection.connection.channel
+
+        channel.eventLoop().submit {
+            channel.pipeline().remove(player.name)
+        }
+    }
+
+    override fun sendPacket(player: Player, packet: Any) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        if (packet !is Packet<*>) {
+            return
+        }
+
+        player.handle.connection.send(packet)
+    }
+
+    override fun clearDisplayFrames() {
+        clearFrames()
+    }
+
+    override fun getPacketListeners(plugin: EcoPlugin): List<PacketListener> {
+        return listOf(
+            PacketAutoRecipe(plugin),
+            PacketHeldItemSlot,
+            PacketOpenWindowMerchant,
+            PacketSetCreativeSlot,
+            PacketSetSlot,
+            PacketWindowItems(plugin)
+        )
+    }
+}

eco-core/core-nms/v1_19_R1/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R1/VillagerTrade.kt

@@ -1,41 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_19_R1
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.VillagerTradeProxy
-import net.minecraft.nbt.CompoundTag
-import net.minecraft.world.item.ItemStack
-import net.minecraft.world.item.trading.MerchantOffer
-import org.bukkit.craftbukkit.v1_19_R1.inventory.CraftItemStack
-import org.bukkit.craftbukkit.v1_19_R1.inventory.CraftMerchantRecipe
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-import java.lang.reflect.Field
-
-class VillagerTrade : VillagerTradeProxy {
-    private val handle: Field = CraftMerchantRecipe::class.java.getDeclaredField("handle")
-
-    override fun displayTrade(
-        recipe: MerchantRecipe,
-        player: Player
-    ): MerchantRecipe {
-        recipe as CraftMerchantRecipe
-
-        val nbt = getHandle(recipe).createTag()
-        for (tag in arrayOf("buy", "buyB", "sell")) {
-            val nms = ItemStack.of(nbt.getCompound(tag))
-            val displayed = Display.display(CraftItemStack.asBukkitCopy(nms), player)
-            val itemNBT = CraftItemStack.asNMSCopy(displayed).save(CompoundTag())
-            nbt.put(tag, itemNBT)
-        }
-
-        return CraftMerchantRecipe(MerchantOffer(nbt))
-    }
-
-    private fun getHandle(recipe: CraftMerchantRecipe): MerchantOffer {
-        return handle[recipe] as MerchantOffer
-    }
-
-    init {
-        handle.isAccessible = true
-    }
-}

eco-core/core-nms/v1_19_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R2/AutoCraft.kt

@@ -1,15 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_19_R2
-
-import com.willfp.eco.internal.spigot.proxy.AutoCraftProxy
-import net.minecraft.network.protocol.game.ClientboundPlaceGhostRecipePacket
-import net.minecraft.resources.ResourceLocation
-
-class AutoCraft : AutoCraftProxy {
-    override fun modifyPacket(packet: Any) {
-        val recipePacket = packet as ClientboundPlaceGhostRecipePacket
-        val fKey = recipePacket.javaClass.getDeclaredField("b")
-        fKey.isAccessible = true
-        val key = fKey[recipePacket] as ResourceLocation
-        fKey[recipePacket] = ResourceLocation(key.namespace, key.path + "_displayed")
-    }
-}

eco-core/core-nms/v1_19_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R2/ChatComponent.kt

@@ -1,93 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_19_R2
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.ChatComponentProxy
-import net.kyori.adventure.nbt.api.BinaryTagHolder
-import net.kyori.adventure.text.BuildableComponent
-import net.kyori.adventure.text.Component
-import net.kyori.adventure.text.TranslatableComponent
-import net.kyori.adventure.text.event.HoverEvent
-import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer
-import net.minecraft.nbt.TagParser
-import org.bukkit.Material
-import org.bukkit.craftbukkit.v1_19_R2.inventory.CraftItemStack
-import org.bukkit.entity.Player
-import org.bukkit.inventory.ItemStack
-
-@Suppress("UNCHECKED_CAST")
-class ChatComponent : ChatComponentProxy {
-    private val gsonComponentSerializer = GsonComponentSerializer.gson()
-
-    override fun modifyComponent(obj: Any, player: Player): Any {
-        if (obj !is net.minecraft.network.chat.Component) {
-            return obj
-        }
-
-        val component = gsonComponentSerializer.deserialize(
-            net.minecraft.network.chat.Component.Serializer.toJson(
-                obj
-            )
-        ).asComponent() as BuildableComponent<*, *>
-
-        val newComponent = modifyBaseComponent(component, player)
-
-        return net.minecraft.network.chat.Component.Serializer.fromJson(
-            gsonComponentSerializer.serialize(newComponent.asComponent())
-        ) ?: obj
-    }
-
-    private fun modifyBaseComponent(baseComponent: Component, player: Player): Component {
-        var component = baseComponent
-
-        if (component is TranslatableComponent) {
-            val args = mutableListOf<Component>()
-            for (arg in component.args()) {
-                args.add(modifyBaseComponent(arg, player))
-            }
-            component = component.args(args)
-        }
-
-        val children = mutableListOf<Component>()
-        for (child in component.children()) {
-            children.add(modifyBaseComponent(child, player))
-        }
-        component = component.children(children)
-
-        val hoverEvent: HoverEvent<Any> = component.style().hoverEvent() as HoverEvent<Any>? ?: return component
-
-        val showItem = hoverEvent.value()
-
-        if (showItem !is HoverEvent.ShowItem) {
-            return component
-        }
-
-        val newShowItem = showItem.nbt(
-            BinaryTagHolder.binaryTagHolder(
-                CraftItemStack.asNMSCopy(
-                    Display.display(
-                        CraftItemStack.asBukkitCopy(
-                            CraftItemStack.asNMSCopy(
-                                ItemStack(
-                                    Material.matchMaterial(
-                                        showItem.item()
-                                            .toString()
-                                    ) ?: return component,
-                                    showItem.count()
-                                )
-                            ).apply {
-                                this.tag = TagParser.parseTag(
-                                    showItem.nbt()?.string() ?: return component
-                                ) ?: return component
-                            }
-                        ),
-                        player
-                    )
-                ).orCreateTag.toString()
-            )
-        )
-
-        val newHover = hoverEvent.value(newShowItem)
-        val style = component.style().hoverEvent(newHover)
-        return component.style(style)
-    }
-}

eco-core/core-nms/v1_19_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R2/CommonsInitializer.kt

@@ -1,5 +1,6 @@
 package com.willfp.eco.internal.spigot.proxy.v1_19_R2
 
+import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.internal.spigot.proxy.CommonsInitializerProxy
 import com.willfp.eco.internal.spigot.proxy.common.CommonsProvider
 import com.willfp.eco.internal.spigot.proxy.common.toResourceLocation
@@ -27,7 +28,7 @@ import org.bukkit.persistence.PersistentDataContainer
 import java.lang.reflect.Field
 
 class CommonsInitializer : CommonsInitializerProxy {
-    override fun init() {
+    override fun init(plugin: EcoPlugin) {
         CommonsProvider.setIfNeeded(CommonsProviderImpl)
     }
 
@@ -60,7 +61,7 @@ class CommonsInitializer : CommonsInitializerProxy {
         }
 
         override fun asBukkitStack(itemStack: net.minecraft.world.item.ItemStack): ItemStack {
-            return CraftItemStack.asBukkitCopy(itemStack)
+            return CraftItemStack.asCraftMirror(itemStack)
         }
 
         override fun mergeIfNeeded(itemStack: ItemStack, nmsStack: net.minecraft.world.item.ItemStack) {

eco-core/core-nms/v1_19_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R2/PacketHandler.kt

@@ -0,0 +1,66 @@
+package com.willfp.eco.internal.spigot.proxy.v1_19_R2
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketListener
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
+import com.willfp.eco.internal.spigot.proxy.common.packet.EcoChannelDuplexHandler
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketAutoRecipe
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketHeldItemSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketOpenWindowMerchant
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetCreativeSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketSetSlot
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.PacketWindowItems
+import com.willfp.eco.internal.spigot.proxy.common.packet.display.frame.clearFrames
+import net.minecraft.network.protocol.Packet
+import org.bukkit.craftbukkit.v1_19_R2.entity.CraftPlayer
+import org.bukkit.entity.Player
+
+class PacketHandler : PacketHandlerProxy {
+    override fun addPlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        player.handle.connection.connection.channel.pipeline()
+            .addBefore("eco_packet_handler", player.name, EcoChannelDuplexHandler(player.uniqueId))
+    }
+
+    override fun removePlayer(player: Player) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        val channel = player.handle.connection.connection.channel
+
+        channel.eventLoop().submit {
+            channel.pipeline().remove(player.name)
+        }
+    }
+
+    override fun sendPacket(player: Player, packet: Any) {
+        if (player !is CraftPlayer) {
+            return
+        }
+
+        if (packet !is Packet<*>) {
+            return
+        }
+
+        player.handle.connection.send(packet)
+    }
+
+    override fun clearDisplayFrames() {
+        clearFrames()
+    }
+
+    override fun getPacketListeners(plugin: EcoPlugin): List<PacketListener> {
+        return listOf(
+            PacketAutoRecipe(plugin),
+            PacketHeldItemSlot,
+            PacketOpenWindowMerchant,
+            PacketSetCreativeSlot,
+            PacketSetSlot,
+            PacketWindowItems(plugin)
+        )
+    }
+}

eco-core/core-nms/v1_19_R2/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/v1_19_R2/VillagerTrade.kt

@@ -1,41 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy.v1_19_R2
-
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.proxy.VillagerTradeProxy
-import net.minecraft.nbt.CompoundTag
-import net.minecraft.world.item.ItemStack
-import net.minecraft.world.item.trading.MerchantOffer
-import org.bukkit.craftbukkit.v1_19_R2.inventory.CraftItemStack
-import org.bukkit.craftbukkit.v1_19_R2.inventory.CraftMerchantRecipe
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-import java.lang.reflect.Field
-
-class VillagerTrade : VillagerTradeProxy {
-    private val handle: Field = CraftMerchantRecipe::class.java.getDeclaredField("handle")
-
-    override fun displayTrade(
-        recipe: MerchantRecipe,
-        player: Player
-    ): MerchantRecipe {
-        recipe as CraftMerchantRecipe
-
-        val nbt = getHandle(recipe).createTag()
-        for (tag in arrayOf("buy", "buyB", "sell")) {
-            val nms = ItemStack.of(nbt.getCompound(tag))
-            val displayed = Display.display(CraftItemStack.asBukkitCopy(nms), player)
-            val itemNBT = CraftItemStack.asNMSCopy(displayed).save(CompoundTag())
-            nbt.put(tag, itemNBT)
-        }
-
-        return CraftMerchantRecipe(MerchantOffer(nbt))
-    }
-
-    private fun getHandle(recipe: CraftMerchantRecipe): MerchantOffer {
-        return handle[recipe] as MerchantOffer
-    }
-
-    init {
-        handle.isAccessible = true
-    }
-}

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

@@ -6,7 +6,6 @@ import com.willfp.eco.core.PluginLike
 import com.willfp.eco.core.PluginProps
 import com.willfp.eco.core.command.CommandBase
 import com.willfp.eco.core.command.PluginCommandBase
-import com.willfp.eco.core.command.impl.PluginCommand
 import com.willfp.eco.core.config.ConfigType
 import com.willfp.eco.core.config.interfaces.Config
 import com.willfp.eco.core.data.keys.PersistentDataKey
@@ -55,7 +54,6 @@ import com.willfp.eco.internal.spigot.proxy.SkullProxy
 import com.willfp.eco.internal.spigot.proxy.TPSProxy
 import org.bukkit.Location
 import org.bukkit.NamespacedKey
-import org.bukkit.command.CommandMap
 import org.bukkit.configuration.ConfigurationSection
 import org.bukkit.entity.Entity
 import org.bukkit.entity.Mob
@@ -78,7 +76,7 @@ class EcoImpl : EcoSpigotPlugin(), Eco {
     )
 
     init {
-        getProxy(CommonsInitializerProxy::class.java).init()
+        getProxy(CommonsInitializerProxy::class.java).init(this)
     }
 
     @Suppress("RedundantNullableReturnType")

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

@@ -1,6 +1,5 @@
 package com.willfp.eco.internal.spigot
 
-import com.willfp.eco.core.AbstractPacketAdapter
 import com.willfp.eco.core.Eco
 import com.willfp.eco.core.EcoPlugin
 import com.willfp.eco.core.Prerequisite
@@ -17,6 +16,7 @@ import com.willfp.eco.core.integrations.mcmmo.McmmoManager
 import com.willfp.eco.core.integrations.placeholder.PlaceholderManager
 import com.willfp.eco.core.integrations.shop.ShopManager
 import com.willfp.eco.core.items.Items
+import com.willfp.eco.core.packet.PacketListener
 import com.willfp.eco.core.particle.Particles
 import com.willfp.eco.core.price.Prices
 import com.willfp.eco.internal.entities.EntityArgParserAdult
@@ -57,14 +57,6 @@ import com.willfp.eco.internal.spigot.data.DataYml
 import com.willfp.eco.internal.spigot.data.PlayerBlockListener
 import com.willfp.eco.internal.spigot.data.ProfileHandler
 import com.willfp.eco.internal.spigot.data.storage.ProfileSaver
-import com.willfp.eco.internal.spigot.display.PacketAutoRecipe
-import com.willfp.eco.internal.spigot.display.PacketChat
-import com.willfp.eco.internal.spigot.display.PacketHeldItemSlot
-import com.willfp.eco.internal.spigot.display.PacketOpenWindowMerchant
-import com.willfp.eco.internal.spigot.display.PacketSetCreativeSlot
-import com.willfp.eco.internal.spigot.display.PacketSetSlot
-import com.willfp.eco.internal.spigot.display.PacketWindowItems
-import com.willfp.eco.internal.spigot.display.frame.clearFrames
 import com.willfp.eco.internal.spigot.drops.CollatedRunnable
 import com.willfp.eco.internal.spigot.eventlisteners.EntityDeathByEntityListeners
 import com.willfp.eco.internal.spigot.eventlisteners.NaturalExpGainListenersPaper
@@ -120,7 +112,9 @@ import com.willfp.eco.internal.spigot.integrations.shop.ShopDeluxeSellwands
 import com.willfp.eco.internal.spigot.integrations.shop.ShopEconomyShopGUI
 import com.willfp.eco.internal.spigot.integrations.shop.ShopShopGuiPlus
 import com.willfp.eco.internal.spigot.integrations.shop.ShopZShop
+import com.willfp.eco.internal.spigot.packet.PacketInjectorListener
 import com.willfp.eco.internal.spigot.proxy.FastItemStackFactoryProxy
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
 import com.willfp.eco.internal.spigot.recipes.CraftingRecipeListener
 import com.willfp.eco.internal.spigot.recipes.StackedRecipeListener
 import com.willfp.eco.internal.spigot.recipes.listeners.ComplexInComplex
@@ -247,7 +241,7 @@ abstract class EcoSpigotPlugin : EcoPlugin() {
 
         ProfileSaver(this, profileHandler)
         this.scheduler.runTimer(
-            { clearFrames() },
+            { getProxy(PacketHandlerProxy::class.java).clearDisplayFrames() },
             this.configYml.getInt("display-frame-ttl").toLong(),
             this.configYml.getInt("display-frame-ttl").toLong()
         )
@@ -357,18 +351,6 @@ abstract class EcoSpigotPlugin : EcoPlugin() {
         )
     }
 
-    override fun loadPacketAdapters(): List<AbstractPacketAdapter> {
-        return listOf(
-            PacketAutoRecipe(this),
-            PacketChat(this),
-            PacketSetCreativeSlot(this),
-            PacketSetSlot(this),
-            PacketWindowItems(this),
-            PacketHeldItemSlot(this),
-            PacketOpenWindowMerchant(this)
-        )
-    }
-
     override fun loadListeners(): List<Listener> {
         val listeners = mutableListOf(
             ArmorListener(),
@@ -380,6 +362,7 @@ abstract class EcoSpigotPlugin : EcoPlugin() {
             ArmorChangeEventListeners(this),
             DataListener(this),
             PlayerBlockListener(this),
+            PacketInjectorListener(this),
             ServerLocking
         )
 
@@ -393,4 +376,8 @@ abstract class EcoSpigotPlugin : EcoPlugin() {
 
         return listeners
     }
+
+    override fun loadPacketListeners(): List<PacketListener> {
+        return this.getProxy(PacketHandlerProxy::class.java).getPacketListeners(this)
+    }
 }

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

@@ -1,35 +0,0 @@
-package com.willfp.eco.internal.spigot.display
-
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.ProtocolLibrary
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.willfp.eco.core.AbstractPacketAdapter
-import com.willfp.eco.core.EcoPlugin
-import com.willfp.eco.internal.spigot.proxy.AutoCraftProxy
-import org.bukkit.entity.Player
-
-class PacketAutoRecipe(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, PacketType.Play.Server.AUTO_RECIPE, false) {
-    override fun onSend(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        if (!this.getPlugin().configYml.getBool("displayed-recipes")) {
-            return
-        }
-
-        if (!EcoPlugin.getPluginNames()
-                .contains(packet.minecraftKeys.values[0].fullKey.split(":".toRegex()).toTypedArray()[0])
-        ) {
-            return
-        }
-        if (packet.minecraftKeys.values[0].fullKey.split(":".toRegex()).toTypedArray()[1].contains("displayed")) {
-            return
-        }
-        getPlugin().getProxy(AutoCraftProxy::class.java).modifyPacket(packet.handle)
-        val newAutoRecipe = PacketContainer(PacketType.Play.Server.AUTO_RECIPE)
-        newAutoRecipe.minecraftKeys.write(0, packet.minecraftKeys.read(0))
-        ProtocolLibrary.getProtocolManager().sendServerPacket(player, newAutoRecipe)
-    }
-}

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

@@ -1,36 +0,0 @@
-package com.willfp.eco.internal.spigot.display
-
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.events.ListenerPriority
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.comphenix.protocol.wrappers.WrappedChatComponent
-import com.willfp.eco.core.AbstractPacketAdapter
-import com.willfp.eco.core.EcoPlugin
-import com.willfp.eco.internal.spigot.proxy.ChatComponentProxy
-import org.bukkit.entity.Player
-
-class PacketChat(plugin: EcoPlugin) :
-    AbstractPacketAdapter(plugin,
-        PacketType.Play.Server.CHAT,
-        if (plugin.configYml.getBool("use-lower-protocollib-priority")) ListenerPriority.NORMAL else ListenerPriority.HIGHEST,
-        true) {
-    override fun onSend(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        for (i in 0 until packet.chatComponents.size()) {
-            val component = packet.chatComponents.read(i) ?: continue
-            if (component.handle == null) {
-                return
-            }
-            val newComponent = WrappedChatComponent.fromHandle(
-                getPlugin().getProxy(
-                    ChatComponentProxy::class.java
-                ).modifyComponent(component.handle, player)
-            )
-            packet.chatComponents.write(i, newComponent)
-        }
-    }
-}

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

@@ -1,29 +0,0 @@
-package com.willfp.eco.internal.spigot.display
-
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.willfp.eco.core.AbstractPacketAdapter
-import com.willfp.eco.core.EcoPlugin
-import com.willfp.eco.internal.spigot.display.frame.DisplayFrame
-import com.willfp.eco.internal.spigot.display.frame.lastDisplayFrame
-import org.bukkit.entity.Player
-
-class PacketHeldItemSlot(plugin: EcoPlugin) :
-    AbstractPacketAdapter(plugin, PacketType.Play.Server.HELD_ITEM_SLOT, false) {
-    override fun onSend(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        player.lastDisplayFrame = DisplayFrame.EMPTY
-    }
-
-    override fun onReceive(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        player.lastDisplayFrame = DisplayFrame.EMPTY
-    }
-}

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

@@ -1,33 +0,0 @@
-package com.willfp.eco.internal.spigot.display
-
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.events.ListenerPriority
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.willfp.eco.core.AbstractPacketAdapter
-import com.willfp.eco.core.EcoPlugin
-import com.willfp.eco.internal.spigot.proxy.VillagerTradeProxy
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-
-class PacketOpenWindowMerchant(plugin: EcoPlugin) :
-    AbstractPacketAdapter(plugin,
-        PacketType.Play.Server.OPEN_WINDOW_MERCHANT,
-        if (plugin.configYml.getBool("use-lower-protocollib-priority")) ListenerPriority.NORMAL else ListenerPriority.MONITOR,
-        true) {
-    override fun onSend(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        val recipes = mutableListOf<MerchantRecipe>()
-
-        for (recipe in packet.merchantRecipeLists.read(0)) {
-            val newRecipe = getPlugin().getProxy(VillagerTradeProxy::class.java).displayTrade(
-                recipe!!, player
-            )
-            recipes.add(newRecipe)
-        }
-        packet.merchantRecipeLists.write(0, recipes)
-    }
-}

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

@@ -1,29 +0,0 @@
-package com.willfp.eco.internal.spigot.display
-
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.willfp.eco.core.AbstractPacketAdapter
-import com.willfp.eco.core.EcoPlugin
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.display.frame.DisplayFrame
-import com.willfp.eco.internal.spigot.display.frame.lastDisplayFrame
-import org.bukkit.entity.Player
-import org.bukkit.inventory.ItemStack
-
-class PacketSetCreativeSlot(plugin: EcoPlugin) :
-    AbstractPacketAdapter(plugin, PacketType.Play.Client.SET_CREATIVE_SLOT, false) {
-    override fun onReceive(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        packet.itemModifier.modify(0) { itemStack: ItemStack? ->
-            Display.revert(
-                itemStack!!
-            )
-        }
-
-        player.lastDisplayFrame = DisplayFrame.EMPTY
-    }
-}

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

@@ -1,28 +0,0 @@
-package com.willfp.eco.internal.spigot.display
-
-import com.comphenix.protocol.PacketType
-import com.comphenix.protocol.events.PacketContainer
-import com.comphenix.protocol.events.PacketEvent
-import com.willfp.eco.core.AbstractPacketAdapter
-import com.willfp.eco.core.EcoPlugin
-import com.willfp.eco.core.display.Display
-import com.willfp.eco.internal.spigot.display.frame.DisplayFrame
-import com.willfp.eco.internal.spigot.display.frame.lastDisplayFrame
-import org.bukkit.entity.Player
-
-class PacketSetSlot(plugin: EcoPlugin) : AbstractPacketAdapter(plugin, PacketType.Play.Server.SET_SLOT, false) {
-    override fun onSend(
-        packet: PacketContainer,
-        player: Player,
-        event: PacketEvent
-    ) {
-        packet.itemModifier.modify(0) {
-            Display.display(
-                it,
-                player
-            )
-        }
-
-        player.lastDisplayFrame = DisplayFrame.EMPTY
-    }
-}

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

@@ -0,0 +1,22 @@
+package com.willfp.eco.internal.spigot.packet
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.internal.spigot.proxy.PacketHandlerProxy
+import org.bukkit.event.EventHandler
+import org.bukkit.event.Listener
+import org.bukkit.event.player.PlayerJoinEvent
+import org.bukkit.event.player.PlayerQuitEvent
+
+class PacketInjectorListener(
+    private val plugin: EcoPlugin
+) : Listener {
+    @EventHandler
+    fun onJoin(event: PlayerJoinEvent) {
+        plugin.getProxy(PacketHandlerProxy::class.java).addPlayer(event.player)
+    }
+
+    @EventHandler
+    fun onLeave(event: PlayerQuitEvent) {
+        plugin.getProxy(PacketHandlerProxy::class.java).addPlayer(event.player)
+    }
+}

eco-core/core-proxy/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/AutoCraftProxy.kt

@@ -1,5 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy
-
-interface AutoCraftProxy {
-    fun modifyPacket(packet: Any)
-}

eco-core/core-proxy/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/ChatComponentProxy.kt

@@ -1,10 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy
-
-import org.bukkit.entity.Player
-
-interface ChatComponentProxy {
-    fun modifyComponent(
-        obj: Any,
-        player: Player
-    ): Any
-}

eco-core/core-proxy/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/CommonsInitializerProxy.kt

@@ -1,5 +1,7 @@
 package com.willfp.eco.internal.spigot.proxy
 
+import com.willfp.eco.core.EcoPlugin
+
 interface CommonsInitializerProxy {
-    fun init()
+    fun init(plugin: EcoPlugin)
 }

eco-core/core-proxy/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/PacketHandlerProxy.kt

@@ -0,0 +1,17 @@
+package com.willfp.eco.internal.spigot.proxy
+
+import com.willfp.eco.core.EcoPlugin
+import com.willfp.eco.core.packet.PacketListener
+import org.bukkit.entity.Player
+
+interface PacketHandlerProxy {
+    fun addPlayer(player: Player)
+
+    fun removePlayer(player: Player)
+
+    fun sendPacket(player: Player, packet: Any)
+
+    fun clearDisplayFrames()
+
+    fun getPacketListeners(plugin: EcoPlugin): List<PacketListener>
+}

eco-core/core-proxy/src/main/kotlin/com/willfp/eco/internal/spigot/proxy/VillagerTradeProxy.kt

@@ -1,11 +0,0 @@
-package com.willfp.eco.internal.spigot.proxy
-
-import org.bukkit.entity.Player
-import org.bukkit.inventory.MerchantRecipe
-
-interface VillagerTradeProxy {
-    fun displayTrade(
-        recipe: MerchantRecipe,
-        player: Player
-    ): MerchantRecipe
-}