Split some block variants into their own classes where behaviour differs

src/pocketmine/block/DoubleTallGrass.php

@@ -0,0 +1,51 @@
+<?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\block;
+
+use pocketmine\item\Item;
+use pocketmine\item\ItemFactory;
+
+class DoubleTallGrass extends DoublePlant{
+
+	public function canBeReplaced() : bool{
+		return true;
+	}
+
+	public function getToolType() : int{
+		return BlockToolType::TYPE_SHEARS;
+	}
+
+	public function getToolHarvestLevel() : int{
+		return 1;
+	}
+
+	public function getDrops(Item $item) : array{
+		if($this->top and !$this->isCompatibleWithTool($item) and mt_rand(0, 7) === 0){
+			return [
+				ItemFactory::get(Item::SEEDS)
+			];
+		}
+		return parent::getDrops($item);
+	}
+}