From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: BillyGalbreath <blake.galbreath@gmail.com>
Date: Thu, 30 Dec 2021 09:56:43 -0600
Subject: [PATCH] Give bee counts in beehives to Purpur clients


diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index ae8025a1c4280cde6b0503e0bcaf468f694a188c..1e017c7c33fd70803312efdd61e090cb8aaf2254 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -1063,6 +1063,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
     }
     public void safeShutdown(boolean waitForShutdown, boolean isRestarting) {
         org.purpurmc.purpur.task.BossBarTask.stopAll(); // Purpur
+        org.purpurmc.purpur.task.BeehiveTask.instance().unregister(); // Purpur
         this.isRestarting = isRestarting;
         this.hasLoggedStop = true; // Paper - Debugging
         if (isDebugging()) io.papermc.paper.util.TraceUtil.dumpTraceForThread("Server stopped"); // Paper - Debugging
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 0d70fe71651c8f9d75a604ed2d5c480b41df1dd6..38de0e9b83ecac489ca676725274d14fcb60dd5c 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -376,6 +376,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
 
             if (gg.pufferfish.pufferfish.PufferfishConfig.enableAsyncMobSpawning) mobSpawnExecutor.start(); // Pufferfish
             org.purpurmc.purpur.task.BossBarTask.startAll(); // Purpur
+            if (org.purpurmc.purpur.PurpurConfig.beeCountPayload) org.purpurmc.purpur.task.BeehiveTask.instance().register(); // Purpur
             return true;
         }
     }
diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
index ffff69021335ca52d10a07bb3b3f272eea6ebcb5..0e28cf20a870f3f3662bd1d8f7a4f2cbf13c48bf 100644
--- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
@@ -434,6 +434,11 @@ public class PurpurConfig {
         allowWaterPlacementInTheEnd = getBoolean("settings.allow-water-placement-in-the-end", allowWaterPlacementInTheEnd);
     }
 
+    public static boolean beeCountPayload = false;
+    private static void beeCountPayload() {
+        beeCountPayload = getBoolean("settings.bee-count-payload", beeCountPayload);
+    }
+
     public static boolean loggerSuppressInitLegacyMaterialError = false;
     public static boolean loggerSuppressIgnoredAdvancementWarnings = false;
     public static boolean loggerSuppressUnrecognizedRecipeErrors = false;
diff --git a/src/main/java/org/purpurmc/purpur/task/BeehiveTask.java b/src/main/java/org/purpurmc/purpur/task/BeehiveTask.java
new file mode 100644
index 0000000000000000000000000000000000000000..15e760d5c0465b24969df3e25bf8409faab8b62e
--- /dev/null
+++ b/src/main/java/org/purpurmc/purpur/task/BeehiveTask.java
@@ -0,0 +1,96 @@
+package org.purpurmc.purpur.task;
+
+import com.google.common.io.ByteArrayDataInput;
+import com.google.common.io.ByteArrayDataOutput;
+import com.google.common.io.ByteStreams;
+import io.netty.buffer.Unpooled;
+import net.minecraft.core.BlockPos;
+import net.minecraft.network.FriendlyByteBuf;
+import net.minecraft.network.protocol.common.ClientboundCustomPayloadPacket;
+import net.minecraft.network.protocol.common.custom.CustomPacketPayload;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.world.level.block.entity.BeehiveBlockEntity;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import org.bukkit.Bukkit;
+import org.bukkit.craftbukkit.entity.CraftPlayer;
+import org.bukkit.craftbukkit.scheduler.MinecraftInternalPlugin;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.PluginBase;
+import org.bukkit.plugin.messaging.PluginMessageListener;
+import org.jetbrains.annotations.NotNull;
+
+public class BeehiveTask implements PluginMessageListener {
+    public static final ResourceLocation BEEHIVE_C2S = new ResourceLocation("purpur", "beehive_c2s");
+    public static final ResourceLocation BEEHIVE_S2C = new ResourceLocation("purpur", "beehive_s2c");
+
+    private static BeehiveTask instance;
+
+    public static BeehiveTask instance() {
+        if (instance == null) {
+            instance = new BeehiveTask();
+        }
+        return instance;
+    }
+
+    private final PluginBase plugin = new MinecraftInternalPlugin();
+
+    private BeehiveTask() {
+    }
+
+    public void register() {
+        Bukkit.getMessenger().registerOutgoingPluginChannel(this.plugin, BEEHIVE_S2C.toString());
+        Bukkit.getMessenger().registerIncomingPluginChannel(this.plugin, BEEHIVE_C2S.toString(), this);
+    }
+
+    public void unregister() {
+        Bukkit.getMessenger().unregisterOutgoingPluginChannel(this.plugin, BEEHIVE_S2C.toString());
+        Bukkit.getMessenger().unregisterIncomingPluginChannel(this.plugin, BEEHIVE_C2S.toString());
+    }
+
+    @Override
+    public void onPluginMessageReceived(@NotNull String channel, Player player, byte[] bytes) {
+        ByteArrayDataInput in = in(bytes);
+        long packedPos = in.readLong();
+        BlockPos pos = BlockPos.of(packedPos);
+
+        ServerPlayer serverPlayer = ((CraftPlayer) player).getHandle();
+
+        // targeted block info max range specified in client at net.minecraft.client.gui.hud.DebugHud#render
+        if (!pos.getCenter().closerThan(serverPlayer.position(), 20)) return; // Targeted Block info max range is 20
+        if (serverPlayer.level().getChunkIfLoaded(pos) == null) return;
+
+        BlockEntity blockEntity = serverPlayer.level().getBlockEntity(pos);
+        if (!(blockEntity instanceof BeehiveBlockEntity beehive)) {
+            return;
+        }
+
+        ByteArrayDataOutput out = out();
+
+        out.writeInt(beehive.getOccupantCount());
+        out.writeLong(packedPos);
+
+        FriendlyByteBuf byteBuf = new FriendlyByteBuf(Unpooled.wrappedBuffer(out.toByteArray()));
+        serverPlayer.connection.send(new ClientboundCustomPayloadPacket(new CustomPacketPayload() {
+            @Override
+            public void write(final FriendlyByteBuf buf) {
+                buf.writeBytes(byteBuf.copy());
+            }
+
+            @Override
+            public ResourceLocation id() {
+                return BEEHIVE_S2C;
+            }
+        }));
+    }
+
+    @SuppressWarnings("UnstableApiUsage")
+    private static ByteArrayDataOutput out() {
+        return ByteStreams.newDataOutput();
+    }
+
+    @SuppressWarnings("UnstableApiUsage")
+    private static ByteArrayDataInput in(byte[] bytes) {
+        return ByteStreams.newDataInput(bytes);
+    }
+}