PaperMC/Remapped-Spigot-Server-Patches/0006-Add-MinecraftKey-Information-to-Objects.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Wed, 4 Jul 2018 01:40:13 -0400
Subject: [PATCH] Add MinecraftKey Information to Objects

Stores the reference to the objects respective MinecraftKey

diff --git a/src/main/java/com/destroystokyo/paper/PaperCommand.java b/src/main/java/com/destroystokyo/paper/PaperCommand.java
index d05eeaa711a09bb121b530654821894e795ff4ea..e95b91cefb0374bd5bb57cc090f5ecd566d7a618 100644
--- a/src/main/java/com/destroystokyo/paper/PaperCommand.java
+++ b/src/main/java/com/destroystokyo/paper/PaperCommand.java
@@ -208,7 +208,7 @@ public class PaperCommand extends Command {
 
                 Collection<Entity> entities = world.entitiesById.values();
                 entities.forEach(e -> {
-                    ResourceLocation key = new ResourceLocation(""); // TODO: update in next patch
+                    ResourceLocation key = e.getMinecraftKey();
 
                     MutablePair<Integer, Map<ChunkPos, Integer>> info = list.computeIfAbsent(key, k -> MutablePair.of(0, Maps.newHashMap()));
                     ChunkPos chunk = new ChunkPos(e.xChunk, e.zChunk);
diff --git a/src/main/java/net/minecraft/server/KeyedObject.java b/src/main/java/net/minecraft/server/KeyedObject.java
new file mode 100644
index 0000000000000000000000000000000000000000..3c9933050ca0a7453ba7950cb3cf4cc8b5b7081d
--- /dev/null
+++ b/src/main/java/net/minecraft/server/KeyedObject.java
@@ -0,0 +1,11 @@
+package net.minecraft.server;
+
+import net.minecraft.resources.ResourceLocation;
+
+public interface KeyedObject {
+    ResourceLocation getMinecraftKey();
+    default String getMinecraftKeyString() {
+        ResourceLocation key = getMinecraftKey();
+        return key != null ? key.toString() : null;
+    }
+}
diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index c7008fcbd4d805fe0e743f1d4ad948dcd86ceae3..48c9d2b7d56832ebd13749a394b8b715f0b1704d 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -135,7 +135,7 @@ import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.plugin.PluginManager;
 // CraftBukkit end
 
-public abstract class Entity implements Nameable, CommandSource {
+public abstract class Entity implements Nameable, CommandSource, net.minecraft.server.KeyedObject { // Paper
 
     // CraftBukkit start
     private static final int CURRENT_LEVEL = 2;
@@ -1761,12 +1761,31 @@ public abstract class Entity implements Nameable, CommandSource {
         return true;
     }
 
+    // Paper start
+    private ResourceLocation entityKey;
+    private String entityKeyString;
+
+    @Override
+    public ResourceLocation getMinecraftKey() {
+        if (entityKey == null) {
+            this.entityKey = EntityType.getKey(this.getType());
+            this.entityKeyString = this.entityKey != null ? this.entityKey.toString() : null;
+        }
+        return entityKey;
+    }
+
+    @Override
+    public String getMinecraftKeyString() {
+        getMinecraftKey(); // Try to load if it doesn't exists. see: https://github.com/PaperMC/Paper/issues/1280
+        return entityKeyString;
+    }
     @Nullable
     public final String getEncodeId() {
         EntityType<?> entitytypes = this.getType();
         ResourceLocation minecraftkey = EntityType.getKey(entitytypes);
 
-        return entitytypes.canSerialize() && minecraftkey != null ? minecraftkey.toString() : null;
+        return entitytypes != null && entitytypes.isPersistable() ? getMinecraftKeyString() : null;
+        // Paper end
     }
 
     protected abstract void readAdditionalSaveData(CompoundTag tag);
diff --git a/src/main/java/net/minecraft/world/entity/EntityType.java b/src/main/java/net/minecraft/world/entity/EntityType.java
index 102298d57cf3143092d04ab1d5d0d69b28d696ea..2cb86de4bfc87a709f0cfa2c4e550d8e7928a3f0 100644
--- a/src/main/java/net/minecraft/world/entity/EntityType.java
+++ b/src/main/java/net/minecraft/world/entity/EntityType.java
@@ -384,6 +384,7 @@ public class EntityType<T extends Entity> {
         }
     }
 
+    public boolean isPersistable() { return canSerialize(); } // Paper - OBFHELPER
     public boolean canSerialize() {
         return this.serialize;
     }
diff --git a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
index 8928a1ae51d24fd15aaae93bc8ea573548f2b012..846fc0f36377337630b2ec2a5f7a5a54c39c2965 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/BlockEntity.java
@@ -23,7 +23,7 @@ import org.bukkit.inventory.InventoryHolder;
 
 import org.spigotmc.CustomTimingsHandler; // Spigot
 
-public abstract class BlockEntity {
+public abstract class BlockEntity implements net.minecraft.server.KeyedObject { // Paper
 
     public CustomTimingsHandler tickTimer = org.bukkit.craftbukkit.SpigotTimings.getTileEntityTimings(this); // Spigot
     // CraftBukkit start - data containers
@@ -31,7 +31,7 @@ public abstract class BlockEntity {
     public CraftPersistentDataContainer persistentDataContainer;
     // CraftBukkit end
     private static final Logger LOGGER = LogManager.getLogger();
-    private final BlockEntityType<?> type;
+    private final BlockEntityType<?> type; public BlockEntityType getTileEntityType() { return type; } // Paper - OBFHELPER
     @Nullable
     protected Level level;
     protected BlockPos worldPosition;
@@ -45,6 +45,26 @@ public abstract class BlockEntity {
         this.type = type;
     }
 
+    // Paper start
+    private String tileEntityKeyString = null;
+    private ResourceLocation tileEntityKey = null;
+
+    @Override
+    public ResourceLocation getMinecraftKey() {
+        if (tileEntityKey == null) {
+            tileEntityKey = BlockEntityType.getKey(this.getTileEntityType());
+            tileEntityKeyString = tileEntityKey != null ? tileEntityKey.toString() : null;
+        }
+        return tileEntityKey;
+    }
+
+    @Override
+    public String getMinecraftKeyString() {
+        getMinecraftKey(); // Try to load if it doesn't exists.
+        return tileEntityKeyString;
+    }
+    // Paper end
+
     @Nullable
     public Level getLevel() {
         return this.level;