Added setting to select the default level format

src/pocketmine/Server.php

@@ -1052,7 +1052,9 @@ class Server{
 			}
 		}
 
-		$provider = "pocketmine\\level\\format\\anvil\\Anvil";
+		if(($provider = LevelProviderManager::getProviderByName($this->getProperty("level-settings.default-format", "mcregion"))) === null){
+			$provider = "pocketmine\\level\\format\\mcregion\\McRegion";
+		}
 
 		$path = $this->getDataPath() . "worlds/" . $name . "/";
 		/** @var \pocketmine\level\format\LevelProvider $provider */
@@ -1500,6 +1502,7 @@ class Server{
 		$this->generationManager = new GenerationRequestManager($this);
 
 		LevelProviderManager::addProvider($this, "pocketmine\\level\\format\\anvil\\Anvil");
+		LevelProviderManager::addProvider($this, "pocketmine\\level\\format\\mcregion\\McRegion");
 
 
 		Generator::addGenerator("pocketmine\\level\\generator\\Flat", "flat");

src/pocketmine/level/format/LevelProvider.php

@@ -32,6 +32,13 @@ interface LevelProvider{
 	 */
 	public function __construct(Level $level, $path);
 
+	/**
+	 * Returns the full provider name, like "anvil" or "mcregion", will be used to find the correct format.
+	 *
+	 * @return string
+	 */
+	public static function getProviderName();
+
 	/** @return string */
 	public function getPath();
 

src/pocketmine/level/format/LevelProviderManager.php

@@ -36,7 +36,7 @@ abstract class LevelProviderManager{
 		if(!is_subclass_of($class, "pocketmine\\level\\format\\LevelProvider")){
 			throw new \Exception("Class is not a subclass of LevelProvider");
 		}
-		self::$providers[strtolower($class)] = $class;
+		self::$providers[strtolower($class::getProviderName())] = $class;
 	}
 
 	/**
@@ -56,4 +56,9 @@ abstract class LevelProviderManager{
 
 		return null;
 	}
+
+	public static function getProviderByName($name){
+		$name = trim(strtolower($name));
+		return isset(self::$providers[$name]) ? self::$providers[$name] : null;
+	}
 }

src/pocketmine/level/format/anvil/Anvil.php

@@ -42,6 +42,9 @@ class Anvil extends BaseLevelProvider{
 	/** @var Chunk[] */
 	protected $chunks = [];
 
+	public static function getProviderName(){
+		return "anvil";
+	}
 
 	public static function isValid($path){
 		$isValid = (file_exists($path . "/level.dat") and is_dir($path . "/region/"));

src/pocketmine/level/format/mcregion/McRegion.php

@@ -41,6 +41,9 @@ class McRegion extends BaseLevelProvider{
 	/** @var Chunk[] */
 	protected $chunks = [];
 
+	public static function getProviderName(){
+		return "mcregion";
+	}
 
 	public static function isValid($path){
 		$isValid = (file_exists($path . "/level.dat") and is_dir($path . "/region/"));

src/pocketmine/resources/pocketmine.yml

@@ -18,6 +18,10 @@ debug:
  #Enables /status
  commands: false
 
+level-settings:
+ default-format: mcregion #The default format that levels will use when created
+ convert-format: false #If true, converts from a format that is not the default to the default format on load
+
 chunk-sending:
  per-tick: 4
  compression-level: 9