Added Emerald ore, Emerald, Emerald block

src/pocketmine/block/Emerald.php

@@ -0,0 +1,52 @@
+<?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/
+ * 
+ *
+*/
+
+namespace pocketmine\block;
+
+use pocketmine\item\Item;
+
+class Emerald extends Solid{
+	public function __construct(){
+		parent::__construct(self::EMERALD_BLOCK, 0, "Emerald Block");
+		$this->hardness = 30;
+	}
+
+	public function getBreakTime(Item $item){
+		switch($item->isPickaxe()){
+			case 5:
+				return 0.95;
+			case 4:
+				return 1.25;
+			default:
+				return 25;
+		}
+	}
+
+	public function getDrops(Item $item){
+		if($item->isPickaxe() >= 4){
+			return array(
+				array(Item::EMERALD_BLOCK, 0, 1),
+			);
+		}else{
+			return [];
+		}
+	}
+}