Purpur/patches/server/0282-Add-item-packet-serialize-event.patch

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 9938bb90bef84cf784f9a1ceb02a1a45aa8b48a1..1f4b64a5f812376c499c98cb4be62469bd0b7dbe 100644
--- a/src/main/java/net/minecraft/network/FriendlyByteBuf.java
+++ b/src/main/java/net/minecraft/network/FriendlyByteBuf.java
@@ -98,6 +98,8 @@ public class FriendlyByteBuf extends ByteBuf {
     private static final int MAX_PUBLIC_KEY_LENGTH = 512;
     private static final Gson GSON = new Gson();
 
+    public static boolean hasItemSerializeEvent = false; // Purpur
+
     public FriendlyByteBuf(ByteBuf parent) {
         this.source = parent;
     }
@@ -679,6 +681,17 @@ 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();
+                ItemStack newStack = ItemStack.fromBukkitCopy(event.getItemStack());
+                if (org.purpurmc.purpur.PurpurConfig.fixNetworkSerializedItemsInCreative && !ItemStack.matches(stack, newStack)) {
+                    stack.save(newStack.getOrCreateTagElement("Purpur.OriginalItem"));
+                }
+                stack = newStack;
+            }
+            // 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 af3ab7bebc69f0485ec2eb5550ad52171cca6de3..77b84d49ab7c9d64dc44df5310dca789e4f2cb63 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1545,6 +1545,7 @@ 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();
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index ea27cb95743970b519b9ab3a3163ba2a7d098921..9dfc12ccf53f5b4d4432bd89449b09504f3a2285 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -3452,6 +3452,12 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Tic
                     }
                 }
             }
+            // Purpur start
+            if (org.purpurmc.purpur.PurpurConfig.fixNetworkSerializedItemsInCreative) {
+                var tag = itemstack.getTagElement("Purpur.OriginalItem");
+                if (tag != null) itemstack = ItemStack.of(tag);
+            }
+            // Purpur end
 
             boolean flag1 = packet.getSlotNum() >= 1 && packet.getSlotNum() <= 45;
             boolean flag2 = itemstack.isEmpty() || itemstack.getDamageValue() >= 0 && itemstack.getCount() <= 64 && !itemstack.isEmpty();
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index df67cee913c64fa1cac3aff8522bf656eb6ff653..8ffa65bb262bdd391755b9d255ad0e68b32bb31d 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -547,4 +547,9 @@ public class PurpurConfig {
             }
         });
     }
+
+    public static boolean fixNetworkSerializedItemsInCreative = false;
+    private static void fixNetworkSerializedCreativeItems() {
+        fixNetworkSerializedItemsInCreative = getBoolean("settings.fix-network-serialized-items-in-creative", fixNetworkSerializedItemsInCreative);
+    }
 }