Correct slab placement

TODO.md

@@ -8,7 +8,6 @@ __Check Milestones [here](https://github.com/shoghicp/PocketMine-MP/issues/miles
 ## Alpha (full Creative)
 - Block Updates
 - Random Chunk Updates
-- Placing Half Slabs
 - Water/lava spread
 - Opening/closing doors, fence gates, trapdoors (reflect it to all players)
 - Fix spawn position resetting

classes/API/BlockAPI.php

@@ -119,7 +119,21 @@ class BlockAPI{
 			return;
 		}
 		
-		//if(!isset(Material::$replaceable[$target[0]])){
+		$replace = false;
+		switch($target[0]){
+			case 44: //Slabs
+				if($data["face"] !== 1){
+					break;
+				}
+				if(($target[1] & 0x07) === ($data["meta"] & 0x07)){
+					$replace = true;
+					$data["block"] = 43;
+					$data["meta"] = $data["meta"] & 0x07;
+				}
+				break;
+		}
+		
+		if($replace === false){
 			switch($data["face"]){
 				case 0:
 					--$data["y"];
@@ -140,14 +154,15 @@ class BlockAPI{
 					++$data["x"];
 					break;
 			}
-		//}
+		}
+			
 		if($data["y"] >= 127){
 			return;
 		}
 		
 		$block = $this->server->api->level->getBlock($data["x"], $data["y"], $data["z"]);
 		
-		if(!isset(Material::$replaceable[$block[0]])){
+		if($replace === false and !isset(Material::$replaceable[$block[0]])){
 			return;
 		}
 		

classes/Player.class.php

@@ -297,7 +297,7 @@ class Player{
 							break;
 						case MC_REQUEST_CHUNK:
 							$this->actionQueue('
-							$max = floor(($this->MTU - 16 - 255) / 192);
+							$max = max(1, floor(($this->MTU - 16 - 255) / 192) - 1);
 							$chunk = $this->server->api->level->getOrderedChunk('.$data["x"].', '.$data["z"].', $max);
 							foreach($chunk as $d){
 								$this->dataPacket(MC_CHUNK_DATA, array(