PocketMine-MP/src/block/TNT.php

<?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\data\bedrock\block\BlockLegacyMetadata;
use pocketmine\data\runtime\block\BlockDataReader;
use pocketmine\data\runtime\block\BlockDataWriter;
use pocketmine\entity\Entity;
use pocketmine\entity\Location;
use pocketmine\entity\object\PrimedTNT;
use pocketmine\entity\projectile\Arrow;
use pocketmine\item\Durable;
use pocketmine\item\enchantment\VanillaEnchantments;
use pocketmine\item\FlintSteel;
use pocketmine\item\Item;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\utils\Random;
use pocketmine\world\sound\IgniteSound;
use function cos;
use function sin;
use const M_PI;

class TNT extends Opaque{
	protected bool $unstable = false; //TODO: Usage unclear, seems to be a weird hack in vanilla
	protected bool $worksUnderwater = false;

	protected function writeStateToItemMeta() : int{
		return $this->worksUnderwater ? BlockLegacyMetadata::TNT_FLAG_UNDERWATER : 0;
	}

	public function getRequiredTypeDataBits() : int{ return 1; }

	protected function decodeType(BlockDataReader $r) : void{
		$this->worksUnderwater = $r->readBool();
	}

	protected function encodeType(BlockDataWriter $w) : void{
		$w->writeBool($this->worksUnderwater);
	}

	public function getRequiredStateDataBits() : int{ return 1; }

	protected function decodeState(BlockDataReader $r) : void{
		$this->unstable = $r->readBool();
	}

	protected function encodeState(BlockDataWriter $w) : void{
		$w->writeBool($this->unstable);
	}

	public function isUnstable() : bool{ return $this->unstable; }

	/** @return $this */
	public function setUnstable(bool $unstable) : self{
		$this->unstable = $unstable;
		return $this;
	}

	public function worksUnderwater() : bool{ return $this->worksUnderwater; }

	/** @return $this */
	public function setWorksUnderwater(bool $worksUnderwater) : self{
		$this->worksUnderwater = $worksUnderwater;
		return $this;
	}

	public function onBreak(Item $item, ?Player $player = null) : bool{
		if($this->unstable){
			$this->ignite();
			return true;
		}
		return parent::onBreak($item, $player);
	}

	public function onInteract(Item $item, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
		if($item instanceof FlintSteel || $item->hasEnchantment(VanillaEnchantments::FIRE_ASPECT())){
			if($item instanceof Durable){
				$item->applyDamage(1);
			}
			$this->ignite();
			return true;
		}

		return false;
	}

	public function hasEntityCollision() : bool{
		return true;
	}

	public function onEntityInside(Entity $entity) : bool{
		if($entity instanceof Arrow && $entity->isOnFire()){
			$this->ignite();
			return false;
		}
		return true;
	}

	public function ignite(int $fuse = 80) : void{
		$this->position->getWorld()->setBlock($this->position, VanillaBlocks::AIR());

		$mot = (new Random())->nextSignedFloat() * M_PI * 2;

		$tnt = new PrimedTNT(Location::fromObject($this->position->add(0.5, 0, 0.5), $this->position->getWorld()));
		$tnt->setFuse($fuse);
		$tnt->setWorksUnderwater($this->worksUnderwater);
		$tnt->setMotion(new Vector3(-sin($mot) * 0.02, 0.2, -cos($mot) * 0.02));

		$tnt->spawnToAll();
		$tnt->broadcastSound(new IgniteSound());
	}

	public function getFlameEncouragement() : int{
		return 15;
	}

	public function getFlammability() : int{
		return 100;
	}

	public function onIncinerate() : void{
		$this->ignite();
	}
}