Implemented sweet berries (#4164)

this doesn't implement the server-side logic for the "stickiness" (slowdown) because we don't have the system needed for it yet.
It also doesn't have parity with vanilla on the damage.

src/block/BlockFactory.php

@@ -585,7 +585,7 @@ class BlockFactory{
 		//TODO: minecraft:sticky_piston
 		//TODO: minecraft:stonecutter_block
 		//TODO: minecraft:structure_block
-		//TODO: minecraft:sweet_berry_bush
+		$this->register(new SweetBerryBush(new BID(Ids::SWEET_BERRY_BUSH, 0, ItemIds::SWEET_BERRIES), "Sweet Berry Bush", BlockBreakInfo::instant()));
 		//TODO: minecraft:turtle_egg
 		//endregion
 

src/block/SweetBerryBush.php

@@ -0,0 +1,161 @@
+<?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\block\utils\BlockDataSerializer;
+use pocketmine\entity\Entity;
+use pocketmine\entity\Living;
+use pocketmine\event\block\BlockGrowEvent;
+use pocketmine\event\entity\EntityDamageByBlockEvent;
+use pocketmine\item\Fertilizer;
+use pocketmine\item\Item;
+use pocketmine\item\VanillaItems;
+use pocketmine\math\Facing;
+use pocketmine\math\Vector3;
+use pocketmine\player\Player;
+use pocketmine\world\BlockTransaction;
+use function mt_rand;
+
+class SweetBerryBush extends Flowable{
+	public const STAGE_SAPLING = 0;
+	public const STAGE_BUSH_NO_BERRIES = 1;
+	public const STAGE_BUSH_SOME_BERRIES = 2;
+	public const STAGE_MATURE = 3;
+
+	protected int $age = self::STAGE_SAPLING;
+
+	protected function writeStateToMeta() : int{
+		return $this->age;
+	}
+
+	public function readStateFromData(int $id, int $stateMeta) : void{
+		$this->age = BlockDataSerializer::readBoundedInt("stage", $stateMeta, self::STAGE_SAPLING, self::STAGE_MATURE);
+	}
+
+	public function getStateBitmask() : int{
+		return 0b111;
+	}
+
+	public function getAge() : int{ return $this->age; }
+
+	/** @return $this */
+	public function setAge(int $age) : self{
+		if($age < self::STAGE_SAPLING || $age > self::STAGE_MATURE){
+			throw new \InvalidArgumentException("Age must be in range 0-3");
+		}
+		$this->age = $age;
+		return $this;
+	}
+
+	public function getBerryDropAmount() : int{
+		if($this->age === self::STAGE_MATURE){
+			return mt_rand(2, 3);
+		}elseif($this->age >= self::STAGE_BUSH_SOME_BERRIES){
+			return mt_rand(1, 2);
+		}
+		return 0;
+	}
+
+	protected function canBeSupportedBy(Block $block) : bool{
+		$id = $block->getId();
+		return $id === BlockLegacyIds::GRASS || $id === BlockLegacyIds::DIRT || $id === BlockLegacyIds::PODZOL;
+	}
+
+	public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
+		if(!$this->canBeSupportedBy($blockReplace->getSide(Facing::DOWN))){
+			return false;
+		}
+		return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
+	}
+
+	public function onInteract(Item $item, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
+		if($this->age < self::STAGE_MATURE && $item instanceof Fertilizer){
+			$block = clone $this;
+			$block->age++;
+
+			$ev = new BlockGrowEvent($this, $block);
+			$ev->call();
+
+			if(!$ev->isCancelled()){
+				$this->pos->getWorld()->setBlock($this->pos, $ev->getNewState());
+			}
+
+			$item->pop();
+		}elseif(($dropAmount = $this->getBerryDropAmount()) > 0){
+			$this->pos->getWorld()->setBlock($this->pos, $this->setAge(self::STAGE_BUSH_NO_BERRIES));
+			$this->pos->getWorld()->dropItem($this->pos, $this->asItem()->setCount($dropAmount));
+		}
+
+		return true;
+	}
+
+	public function asItem() : Item{
+		return VanillaItems::SWEET_BERRIES();
+	}
+
+	public function getDropsForCompatibleTool(Item $item) : array{
+		if(($dropAmount = $this->getBerryDropAmount()) > 0){
+			return [
+				$this->asItem()->setCount($dropAmount)
+			];
+		}
+
+		return [];
+	}
+
+	public function onNearbyBlockChange() : void{
+		if(!$this->canBeSupportedBy($this->getSide(Facing::DOWN))){
+			$this->pos->getWorld()->useBreakOn($this->pos);
+		}
+	}
+
+	public function ticksRandomly() : bool{
+		return true;
+	}
+
+	public function onRandomTick() : void{
+		if($this->age < self::STAGE_MATURE and mt_rand(0, 2) === 1){
+			$block = clone $this;
+			++$block->age;
+			$ev = new BlockGrowEvent($this, $block);
+			$ev->call();
+			if(!$ev->isCancelled()){
+				$this->pos->getWorld()->setBlock($this->pos, $ev->getNewState());
+			}
+		}
+	}
+
+	public function hasEntityCollision() : bool{
+		return true;
+	}
+
+	public function onEntityInside(Entity $entity) : bool{
+		//TODO: in MCPE, this only triggers if moving while inside the bush block - we don't have the system to deal
+		//with that reliably right now
+		if($this->age >= self::STAGE_BUSH_NO_BERRIES && $entity instanceof Living){
+			$entity->attack(new EntityDamageByBlockEvent($this, $entity, EntityDamageByBlockEvent::CAUSE_CONTACT, 1));
+		}
+		return true;
+	}
+}

src/block/VanillaBlocks.php

@@ -545,6 +545,7 @@ use function assert;
  * @method static Wood STRIPPED_SPRUCE_WOOD()
  * @method static Sugarcane SUGARCANE()
  * @method static DoublePlant SUNFLOWER()
+ * @method static SweetBerryBush SWEET_BERRY_BUSH()
  * @method static TallGrass TALL_GRASS()
  * @method static TNT TNT()
  * @method static Torch TORCH()
@@ -1107,6 +1108,7 @@ final class VanillaBlocks{
 		self::register("stripped_spruce_wood", $factory->get(467, 9));
 		self::register("sugarcane", $factory->get(83, 0));
 		self::register("sunflower", $factory->get(175, 0));
+		self::register("sweet_berry_bush", $factory->get(462, 0));
 		self::register("tall_grass", $factory->get(31, 1));
 		self::register("tnt", $factory->get(46, 0));
 		self::register("torch", $factory->get(50, 5));