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 c10401e587a710d49c4af481c1e531b4bf51f755..40b9a89531d1df347191edd274485cf977051e04 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -298,6 +298,7 @@ public class ServerPlayer extends Player {
     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 - replace player chunk loader
     private final java.util.concurrent.atomic.AtomicReference<io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances> viewDistances = new java.util.concurrent.atomic.AtomicReference<>(new io.papermc.paper.chunk.system.RegionizedPlayerChunkLoader.ViewDistances(-1, -1, -1));
diff --git a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
index 308aef9c4933b2bcdd622a34b68efab4a220fe4d..a8edeb5a40cd9aac933805259407e32c544d181e 100644
--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -78,6 +78,7 @@ 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 = new ResourceLocation("brand"); // Paper - Brand support
+    protected static final ResourceLocation PURPUR_CLIENT = new ResourceLocation("purpur", "client"); // Purpur
 
     public ServerCommonPacketListenerImpl(MinecraftServer minecraftserver, Connection networkmanager, CommonListenerCookie commonlistenercookie, ServerPlayer player) { // CraftBukkit
         this.server = minecraftserver;
@@ -170,6 +171,13 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
                 ServerGamePacketListenerImpl.LOGGER.error("Couldn\'t register custom payload", ex);
                 this.disconnect("Invalid payload REGISTER!", org.bukkit.event.player.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 561a7a8e96e2d91bbb87fe6230e94b5f38073d27..bae888162966f5e31f92c49fbf6df119c2b83781 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -3519,4 +3519,11 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     public void setSendViewDistance(final int viewDistance) {
         this.getHandle().setSendViewDistance(viewDistance);
     }
+
+    // Purpur start
+    @Override
+    public boolean usesPurpurClient() {
+        return getHandle().purpurClient;
+    }
+    // Purpur end
 }