Add getChunkViewers API

Signed-off-by: Irmo van den Berge <irmo.vandenberge@ziggo.nl>

src/main/generated/com/bergerkiller/generated/net/minecraft/server/level/PlayerChunkMapHandle.java

@@ -22,6 +22,15 @@ public abstract class PlayerChunkMapHandle extends Template.Handle {
     public abstract PlayerChunkHandle getVisibleChunk(int x, int z);
     public abstract PlayerChunkHandle getUpdatingChunk(int x, int z);
     public abstract boolean isChunkEntered(EntityPlayerHandle entityplayer, int chunkX, int chunkZ);
+
+    public java.util.Collection<org.bukkit.entity.Player> getChunkEnteredPlayers(int chunkX, int chunkZ) {
+        PlayerChunkHandle playerChunk = getVisibleChunk(chunkX, chunkZ);
+        if (playerChunk == null || playerChunk.getChunkIfLoaded() == null) {
+            return java.util.Collections.emptyList();
+        } else {
+            return playerChunk.getPlayers();
+        }
+    }
     /**
      * Stores class members for <b>net.minecraft.server.level.PlayerChunkMap</b>.
      * Methods, fields, and constructors can be used without using Handle Objects.

src/main/java/com/bergerkiller/bukkit/common/Common.java

@@ -49,7 +49,8 @@ public class Common {
             "Common:Sound:StopSoundPacket",
             "Common:Sound:CloudParser",
             "Common:Event:PlayerAdvancementProgressEvent",
-            "Common:Yaml:ChildWithLiteralName"
+            "Common:Yaml:ChildWithLiteralName",
+            "Common:ChunkUtil:getChunkViewers"
     ).collect(Collectors.toSet());
 
     /**

src/main/java/com/bergerkiller/bukkit/common/utils/ChunkUtil.java

@@ -10,8 +10,10 @@ import com.bergerkiller.bukkit.common.internal.logic.RegionHandler;
 import com.bergerkiller.bukkit.common.wrappers.BlockData;
 import com.bergerkiller.bukkit.common.wrappers.ChunkSection;
 import com.bergerkiller.bukkit.common.wrappers.HeightMap;
+import com.bergerkiller.generated.net.minecraft.server.level.PlayerChunkMapHandle;
 import com.bergerkiller.generated.net.minecraft.server.level.WorldServerHandle;
 import com.bergerkiller.generated.net.minecraft.world.level.EnumSkyBlockHandle;
+import com.bergerkiller.generated.net.minecraft.world.level.WorldHandle;
 import com.bergerkiller.generated.net.minecraft.world.level.chunk.ChunkHandle;
 import com.bergerkiller.generated.net.minecraft.world.level.chunk.ChunkSectionHandle;
 
@@ -280,6 +282,30 @@ public class ChunkUtil {
         return ChunkHandle.fromBukkit(chunk).getEntities();
     }
 
+    /**
+     * Gets a collection of players that are presently viewing / in range of a chunk.
+     * Block changes are notified to these players.
+     *
+     * @param chunk Chunk
+     * @return Unmodifiable collection of players that view this chunk
+     */
+    public static Collection<Player> getChunkViewers(org.bukkit.Chunk chunk) {
+        return getChunkViewers(chunk.getWorld(), chunk.getX(), chunk.getZ());
+    }
+
+    /**
+     * Gets a collection of players that are presently viewing / in range of a chunk.
+     * Block changes are notified to these players.
+     *
+     * @param world World the chunk is in
+     * @param chunkX The chunk X-coordinate
+     * @param chunkZ The chunk Z-coordinate
+     * @return Unmodifiable collection of players that view this chunk
+     */
+    public static Collection<Player> getChunkViewers(org.bukkit.World world, int chunkX, int chunkZ) {
+        return WorldServerHandle.fromBukkit(world).getPlayerChunkMap().getChunkEnteredPlayers(chunkX, chunkZ);
+    }
+
     /**
      * Checks if a chunk is about be loaded
      *

src/main/templates/com/bergerkiller/templates/net/minecraft/server_level_playerchunk.txt

@@ -426,6 +426,17 @@ class PlayerChunkMap {
     }
 #endif
 
+<code>
+    public java.util.Collection<org.bukkit.entity.Player> getChunkEnteredPlayers(int chunkX, int chunkZ) {
+        PlayerChunkHandle playerChunk = getVisibleChunk(chunkX, chunkZ);
+        if (playerChunk == null || playerChunk.getChunkIfLoaded() == null) {
+            return java.util.Collections.emptyList();
+        } else {
+            return playerChunk.getPlayers();
+        }
+    }
+</code>
+
 #if version >= 1.14
     public boolean isChunkEntered((EntityPlayerHandle) EntityPlayer entityplayer, int chunkX, int chunkZ) {
   #if version >= 1.18