From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Fri, 30 Jul 2021 14:31:25 -0500
Subject: [PATCH] Purpur client support


diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index fc7f7a34babd095a51b5321f600aef65a2a9d123..be20eed6e3bfab7a78228dfb42b50f80ad3d817c 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -327,6 +327,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player imple
     public com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent playerNaturallySpawnedEvent; // Paper - PlayerNaturallySpawnCreaturesEvent
     public @Nullable String clientBrandName = null; // Paper - Brand support
     public org.bukkit.event.player.PlayerQuitEvent.QuitReason quitReason = null; // Paper - Add API for quit reason; there are a lot of changes to do if we change all methods leading to the event
+    public boolean purpurClient = false; // Purpur - Purpur client support
 
     // Paper start - rewrite chunk system
     private ca.spottedleaf.moonrise.patches.chunk_system.player.RegionizedPlayerChunkLoader.PlayerChunkLoaderData chunkLoader;
diff --git a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
index b0bc66dc7248aae691dcab68b925b52a1695e63f..92749b57d3a2b2ffee79436319513248846296b6 100644
--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -85,6 +85,7 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
     public final java.util.Map<java.util.UUID, net.kyori.adventure.resource.ResourcePackCallback> packCallbacks = new java.util.concurrent.ConcurrentHashMap<>(); // Paper - adventure resource pack callbacks
     private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
     protected static final ResourceLocation MINECRAFT_BRAND = ResourceLocation.withDefaultNamespace("brand"); // Paper - Brand support
+    protected static final ResourceLocation PURPUR_CLIENT = ResourceLocation.fromNamespaceAndPath("purpur", "client"); // Purpur - Purpur client support
 
     public ServerCommonPacketListenerImpl(MinecraftServer minecraftserver, Connection networkmanager, CommonListenerCookie commonlistenercookie, ServerPlayer player) { // CraftBukkit
         this.server = minecraftserver;
@@ -179,6 +180,13 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
                 ServerGamePacketListenerImpl.LOGGER.error("Couldn\'t register custom payload", ex);
                 this.disconnect(Component.literal("Invalid payload REGISTER!"), PlayerKickEvent.Cause.INVALID_PAYLOAD); // Paper - kick event cause
             }
+        // Purpur start - Purpur client support
+        } else if (identifier.equals(PURPUR_CLIENT)) {
+            try {
+                player.purpurClient = true;
+            } catch (Exception ignore) {
+            }
+        // Purpur end - Purpur client support
         } else if (identifier.equals(ServerCommonPacketListenerImpl.CUSTOM_UNREGISTER)) {
             try {
                 String channels = payload.toString(com.google.common.base.Charsets.UTF_8);
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 6a647cab8b2e476987931486e290703b8726f2c7..c5bd2a45b32e8dff83c148379544db125684622a 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -3565,4 +3565,11 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundEntityEventPacket(((CraftEntity) target).getHandle(), effect.getData()));
     }
     // Paper end - entity effect API
+
+    // Purpur start - Purpur client support
+    @Override
+    public boolean usesPurpurClient() {
+        return getHandle().purpurClient;
+    }
+    // Purpur end - Purpur client support
 }