Added TallGrassTrait, remove weirdly specific logic from FortuneDropHelper

this needs to be dealt with before release otherwise we'll be stuck with FortuneDropHelper::grass()
this is the obvious solution and should have been done some time ago - stuff like flammability was already a problem for double tall grass anyway

src/block/DoubleTallGrass.php

@@ -23,10 +23,13 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\block\utils\FortuneDropHelper;
+use pocketmine\block\utils\TallGrassTrait;
 use pocketmine\item\Item;
 
 class DoubleTallGrass extends DoublePlant{
+	use TallGrassTrait {
+		getDropsForIncompatibleTool as traitGetDropsForIncompatibleTool;
+	}
 
 	public function canBeReplaced() : bool{
 		return true;
@@ -34,7 +37,7 @@ class DoubleTallGrass extends DoublePlant{
 
 	public function getDropsForIncompatibleTool(Item $item) : array{
 		if($this->top){
-			return FortuneDropHelper::grass($item);
+			return $this->traitGetDropsForIncompatibleTool($item);
 		}
 		return [];
 	}

src/block/TallGrass.php

@@ -23,7 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\block\utils\FortuneDropHelper;
+use pocketmine\block\utils\TallGrassTrait;
 use pocketmine\item\Item;
 use pocketmine\math\Facing;
 use pocketmine\math\Vector3;
@@ -31,10 +31,7 @@ use pocketmine\player\Player;
 use pocketmine\world\BlockTransaction;
 
 class TallGrass extends Flowable{
-
-	public function canBeReplaced() : bool{
-		return true;
-	}
+	use TallGrassTrait;
 
 	private function canBeSupportedBy(Block $block) : bool{
 		return $block->hasTypeTag(BlockTypeTags::DIRT) || $block->hasTypeTag(BlockTypeTags::MUD);
@@ -53,16 +50,4 @@ class TallGrass extends Flowable{
 			$this->position->getWorld()->useBreakOn($this->position);
 		}
 	}
-
-	public function getDropsForIncompatibleTool(Item $item) : array{
-		return FortuneDropHelper::grass($item);
-	}
-
-	public function getFlameEncouragement() : int{
-		return 60;
-	}
-
-	public function getFlammability() : int{
-		return 100;
-	}
 }

src/block/utils/FortuneDropHelper.php

@@ -25,7 +25,6 @@ namespace pocketmine\block\utils;
 
 use pocketmine\item\enchantment\VanillaEnchantments;
 use pocketmine\item\Item;
-use pocketmine\item\VanillaItems;
 use function max;
 use function min;
 use function mt_getrandmax;
@@ -85,26 +84,6 @@ final class FortuneDropHelper{
 		return $count;
 	}
 
-	/**
-	 * Grass have a fixed chance to drop wheat seed.
-	 * Fortune level increases the maximum number of seeds that can be dropped.
-	 * A discrete uniform distribution is used to determine the number of seeds dropped.
-	 *
-	 * TODO: I'm not sure this really belongs here, but it's preferable not to duplicate this code between grass and
-	 * tall grass.
-	 *
-	 * @return Item[]
-	 */
-	public static function grass(Item $usedItem) : array{
-		if(FortuneDropHelper::bonusChanceDivisor($usedItem, 8, 2)){
-			return [
-				VanillaItems::WHEAT_SEEDS()
-			];
-		}
-
-		return [];
-	}
-
 	/**
 	 * Adds the fortune level to the base max and picks a random number between the minimim and adjusted maximum.
 	 * Each amount in the range has an equal chance of being picked.

src/block/utils/TallGrassTrait.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\block\utils;
+
+use pocketmine\item\Item;
+use pocketmine\item\VanillaItems;
+
+/**
+ * @internal
+ */
+trait TallGrassTrait{
+	public function canBeReplaced() : bool{
+		return true;
+	}
+
+	public function getDropsForIncompatibleTool(Item $item) : array{
+		if(FortuneDropHelper::bonusChanceDivisor($item, 8, 2)){
+			return [
+				VanillaItems::WHEAT_SEEDS()
+			];
+		}
+
+		return [];
+	}
+
+	public function getFlameEncouragement() : int{
+		return 60;
+	}
+
+	public function getFlammability() : int{
+		return 100;
+	}
+}