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 5980b70e2d7273239245237189b2debcbccfbac3..ce09c4900aee5a75c0d13a7bffd97a0711ead774 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -302,6 +302,7 @@ 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
 
     // 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 b43f87ff4b9853b5d4bbea5ff9686d64d9d0d26b..b66d4047b5e529f5f737efb0ff1edda805de1316 100644
--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -79,6 +79,7 @@ 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
 
     public ServerCommonPacketListenerImpl(MinecraftServer minecraftserver, Connection networkmanager, CommonListenerCookie commonlistenercookie, ServerPlayer player) { // CraftBukkit
         this.server = minecraftserver;
@@ -171,6 +172,13 @@ 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
+        } else if (identifier.equals(PURPUR_CLIENT)) {
+            try {
+                player.purpurClient = true;
+            } catch (Exception ignore) {
+            }
+        // Purpur end
         } 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 992437a6e838f653f32d33b5b3f702c484640a97..c2e0baa40e556fd8bb2ae406b321da01f1d05079 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -3554,4 +3554,11 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         ((ca.spottedleaf.moonrise.patches.chunk_system.player.ChunkSystemServerPlayer)this.getHandle())
             .moonrise$getViewDistanceHolder().setSendViewDistance(viewDistance);
     }
+
+    // Purpur start
+    @Override
+    public boolean usesPurpurClient() {
+        return getHandle().purpurClient;
+    }
+    // Purpur end
 }