From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MelnCat <melncatuwu@gmail.com>
Date: Sat, 24 Sep 2022 09:56:28 -0700
Subject: [PATCH] Add item packet serialize event


diff --git a/src/main/java/net/minecraft/network/FriendlyByteBuf.java b/src/main/java/net/minecraft/network/FriendlyByteBuf.java
index 32ee4ed11aefd82dca2e3e78b3108f041fdc3695..314318a21b6fa9e827945d8996c6ed0f9679a4eb 100644
--- a/src/main/java/net/minecraft/network/FriendlyByteBuf.java
+++ b/src/main/java/net/minecraft/network/FriendlyByteBuf.java
@@ -89,6 +89,8 @@ public class FriendlyByteBuf extends ByteBuf {
     private static final int MAX_PUBLIC_KEY_HEADER_SIZE = 256;
     private static final int MAX_PUBLIC_KEY_LENGTH = 512;
 
+    public static boolean hasItemSerializeEvent = false; // Purpur
+
     public FriendlyByteBuf(ByteBuf parent) {
         this.source = parent;
     }
@@ -632,6 +634,13 @@ public class FriendlyByteBuf extends ByteBuf {
             this.writeBoolean(false);
         } else {
             this.writeBoolean(true);
+            // Purpur start
+            if (hasItemSerializeEvent) {
+                var event = new org.purpurmc.purpur.event.packet.NetworkItemSerializeEvent(stack.asBukkitCopy());
+                event.callEvent();
+                stack = ItemStack.fromBukkitCopy(event.getItemStack());
+            }
+            // Purpur end
             Item item = stack.getItem();
 
             this.writeId(BuiltInRegistries.ITEM, item);
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 99727dd2ee576c8c2fe2be1e6dcf9b1f6be0c894..b915e6a13a518f05d109c707142efa3946892f0c 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1535,6 +1535,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
         //MinecraftTimings.timeUpdateTimer.stopTiming(); // Spigot // Paper // Purpur
 
         this.isIteratingOverLevels = true; // Paper
+        net.minecraft.network.FriendlyByteBuf.hasItemSerializeEvent = org.purpurmc.purpur.event.packet.NetworkItemSerializeEvent.getHandlerList().getRegisteredListeners().length > 0; // Purpur
         Iterator iterator = this.getAllLevels().iterator(); // Paper - move down
         while (iterator.hasNext()) {
             ServerLevel worldserver = (ServerLevel) iterator.next();