added ChunkListenerNoOpTrait to reduce chunklistener boilerplate

src/pocketmine/network/mcpe/ChunkCache.php

@@ -25,6 +25,7 @@ namespace pocketmine\network\mcpe;
 
 use pocketmine\math\Vector3;
 use pocketmine\world\ChunkListener;
+use pocketmine\world\ChunkListenerNoOpTrait;
 use pocketmine\world\format\Chunk;
 use pocketmine\world\World;
 use function spl_object_id;
@@ -159,6 +160,13 @@ class ChunkCache implements ChunkListener{
 		}
 	}
 
+	use ChunkListenerNoOpTrait {
+		//force overriding of these
+		onChunkChanged as private;
+		onBlockChanged as private;
+		onChunkUnloaded as private;
+	}
+
 	/**
 	 * @see ChunkListener::onChunkChanged()
 	 * @param Chunk $chunk
@@ -187,22 +195,6 @@ class ChunkCache implements ChunkListener{
 		$this->world->unregisterChunkListener($this, $chunk->getX(), $chunk->getZ());
 	}
 
-	/**
-	 * @see ChunkListener::onChunkLoaded()
-	 * @param Chunk $chunk
-	 */
-	public function onChunkLoaded(Chunk $chunk) : void{
-		//NOOP
-	}
-
-	/**
-	 * @see ChunkListener::onChunkPopulated()
-	 * @param Chunk $chunk
-	 */
-	public function onChunkPopulated(Chunk $chunk) : void{
-		//NOOP - we also receive this in onChunkChanged, so we don't care here
-	}
-
 	/**
 	 * Returns the number of bytes occupied by the cache data in this cache. This does not include the size of any
 	 * promises referenced by the cache.

src/pocketmine/player/Player.php

@@ -104,6 +104,7 @@ use pocketmine\timings\Timings;
 use pocketmine\utils\TextFormat;
 use pocketmine\utils\UUID;
 use pocketmine\world\ChunkListener;
+use pocketmine\world\ChunkListenerNoOpTrait;
 use pocketmine\world\ChunkLoader;
 use pocketmine\world\format\Chunk;
 use pocketmine\world\particle\PunchBlockParticle;
@@ -2701,26 +2702,14 @@ class Player extends Human implements CommandSender, ChunkLoader, ChunkListener,
 		$this->server->getPlayerMetadata()->removeMetadata($this, $metadataKey, $owningPlugin);
 	}
 
+	use ChunkListenerNoOpTrait {
+		onChunkChanged as private;
+	}
+
 	public function onChunkChanged(Chunk $chunk) : void{
 		if(isset($this->usedChunks[$hash = World::chunkHash($chunk->getX(), $chunk->getZ())])){
 			$this->usedChunks[$hash] = false;
 			$this->nextChunkOrderRun = 0;
 		}
 	}
-
-	public function onChunkLoaded(Chunk $chunk) : void{
-
-	}
-
-	public function onChunkPopulated(Chunk $chunk) : void{
-
-	}
-
-	public function onChunkUnloaded(Chunk $chunk) : void{
-
-	}
-
-	public function onBlockChanged(Vector3 $block) : void{
-
-	}
 }

src/pocketmine/world/ChunkListenerNoOpTrait.php

@@ -0,0 +1,54 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\world;
+
+use pocketmine\math\Vector3;
+use pocketmine\world\format\Chunk;
+
+/**
+ * This trait implements no-op default methods for chunk listeners.
+ * @see ChunkListener
+ */
+trait ChunkListenerNoOpTrait/* implements ChunkListener*/{
+
+	public function onChunkChanged(Chunk $chunk) : void{
+		//NOOP
+	}
+
+	public function onChunkLoaded(Chunk $chunk) : void{
+		//NOOP
+	}
+
+	public function onChunkUnloaded(Chunk $chunk) : void{
+		//NOOP
+	}
+
+	public function onChunkPopulated(Chunk $chunk) : void{
+		//NOOP
+	}
+
+	public function onBlockChanged(Vector3 $block) : void{
+		//NOOP
+	}
+}