From 7a5dbc00ebc5103326157c6a22529554e6fca3a6 Mon Sep 17 00:00:00 2001
From: willies952002 <admin@domnian.com>
Date: Wed, 29 Aug 2018 00:37:42 -0400
Subject: [PATCH] Implement Force-Loaded Chunk API


diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 650e605b5b..2ff8536d59 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -3023,6 +3023,7 @@ public abstract class World implements IEntityAccess, GeneratorAccess, IIBlockAc
         return forcedchunk != null && forcedchunk.a().contains(ChunkCoordIntPair.a(i, j));
     }
 
+    public boolean setForcedChunk(int i, int j, boolean flag) { return b(i, j, flag); } // Paper - OBFHELPER
     public boolean b(int i, int j, boolean flag) {
         String s = "chunks";
         ForcedChunk forcedchunk = (ForcedChunk) this.a(this.worldProvider.getDimensionManager(), ForcedChunk::new, "chunks");
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
index 12c6d850d2..55394e0c15 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftChunk.java
@@ -289,6 +289,18 @@ public class CraftChunk implements Chunk {
         Preconditions.checkArgument(0 <= z && z <= 15, "z out of range (expected 0-15, got %s)", z);
     }
 
+    // Paper start - Force-Loaded Chunk API
+    @Override
+    public boolean isForceLoaded() {
+        return getHandle().getWorld().isForcedChunk(this.x, this.z);
+    }
+
+    @Override
+    public void setForceLoaded(boolean force) {
+        getHandle().getWorld().setForcedChunk(this.x, this.z, force);
+    }
+    // Paper end
+
     static {
         Arrays.fill(emptySkyLight, (byte) 0xFF);
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 99d8199996..f8ef782f14 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -600,6 +600,10 @@ public class CraftWorld implements World {
     public boolean isChunkGenerated(int x, int z) {
         return this.getHandle().getChunkProviderServer().isChunkGenerated(x, z);
     }
+
+    public boolean isChunkForceLoaded(int x, int z) {
+        return this.isChunkGenerated(x, z) && this.getHandle().isForcedChunk(x, z);
+    }
     // Paper end
 
     public ChunkGenerator getGenerator() {
-- 
2.19.0