From 75f26f4ed9011e9dd12f5b49b26b94f8f4dacac1 Mon Sep 17 00:00:00 2001
From: Keuin <keuinx@gmail.com>
Date: Fri, 15 Jan 2021 00:42:54 +0800
Subject: Version 1.4.0: supports reintroducing llama item duplication. Add
 configuration file.

---
 .../mixin/ReintroduceLlamaItemDuping.java          | 102 +++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 src/main/java/com/keuin/ohmyvanillamc/mixin/ReintroduceLlamaItemDuping.java

(limited to 'src/main/java/com/keuin/ohmyvanillamc/mixin/ReintroduceLlamaItemDuping.java')

diff --git a/src/main/java/com/keuin/ohmyvanillamc/mixin/ReintroduceLlamaItemDuping.java b/src/main/java/com/keuin/ohmyvanillamc/mixin/ReintroduceLlamaItemDuping.java
new file mode 100644
index 0000000..29ed03a
--- /dev/null
+++ b/src/main/java/com/keuin/ohmyvanillamc/mixin/ReintroduceLlamaItemDuping.java
@@ -0,0 +1,102 @@
+package com.keuin.ohmyvanillamc.mixin;
+
+import com.keuin.ohmyvanillamc.OhMyVanillaMinecraft;
+import net.minecraft.advancement.PlayerAdvancementTracker;
+import net.minecraft.entity.Entity;
+import net.minecraft.network.Packet;
+import net.minecraft.network.packet.s2c.play.PlayerListS2CPacket;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.PlayerManager;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.stat.ServerStatHandler;
+import net.minecraft.stat.Stats;
+import org.apache.logging.log4j.Logger;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+@Mixin(PlayerManager.class)
+public abstract class ReintroduceLlamaItemDuping {
+
+    @Shadow
+    protected abstract void savePlayerData(ServerPlayerEntity player);
+
+    @Shadow
+    @Final
+    private static Logger LOGGER;
+
+    @Shadow
+    @Final
+    private List<ServerPlayerEntity> players;
+
+    @Shadow
+    @Final
+    private MinecraftServer server;
+
+    @Shadow
+    @Final
+    private Map<UUID, ServerPlayerEntity> playerMap;
+
+    @Shadow
+    @Final
+    private Map<UUID, ServerStatHandler> statisticsMap;
+
+    @Shadow
+    @Final
+    private Map<UUID, PlayerAdvancementTracker> advancementTrackers;
+
+    @Shadow
+    public abstract void sendToAll(Packet<?> packet);
+
+    /**
+     * @reason re-introduce llama item duplicating glitch.
+     * @author trueKeuin
+     */
+    @Overwrite
+    public void remove(ServerPlayerEntity player) {
+        ServerWorld serverWorld = player.getServerWorld();
+        player.incrementStat(Stats.LEAVE_GAME);
+        this.savePlayerData(player);
+        if (player.hasVehicle()) {
+            Entity entity = player.getRootVehicle();
+            if (entity.hasPlayerRider()) {
+                LOGGER.debug("Removing player mount");
+                player.stopRiding();
+                serverWorld.removeEntity(entity);
+                // entity.removed = true
+                entity.removed = !OhMyVanillaMinecraft.getConfiguration().isReintroduceLlamaItemDuplicating() || entity.removed;
+
+                Entity entity2;
+                for (Iterator var4 = entity.getPassengersDeep().iterator(); var4.hasNext(); // entity2.removed = true
+                     entity2.removed = !OhMyVanillaMinecraft.getConfiguration().isReintroduceLlamaItemDuplicating() || entity2.removed) {
+                    entity2 = (Entity) var4.next();
+                    serverWorld.removeEntity(entity2);
+                }
+
+                serverWorld.getChunk(player.chunkX, player.chunkZ).markDirty();
+            }
+        }
+
+        player.detach();
+        serverWorld.removePlayer(player);
+        player.getAdvancementTracker().clearCriteria();
+        this.players.remove(player);
+        this.server.getBossBarManager().onPlayerDisconnect(player);
+        UUID uUID = player.getUuid();
+        ServerPlayerEntity serverPlayerEntity = (ServerPlayerEntity) this.playerMap.get(uUID);
+        if (serverPlayerEntity == player) {
+            this.playerMap.remove(uUID);
+            this.statisticsMap.remove(uUID);
+            this.advancementTrackers.remove(uUID);
+        }
+
+        this.sendToAll(new PlayerListS2CPacket(PlayerListS2CPacket.Action.REMOVE_PLAYER, new ServerPlayerEntity[]{player}));
+    }
+}
-- 
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