<?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\block\Block;
use pocketmine\math\Vector3;

/**
 * Used by blocks which always have the same support requirements no matter what state they are in.
 * Prevents placement if support isn't available, and automatically destroys itself if support is removed.
 */
trait StaticSupportTrait{

	/**
	 * Implement this to define the block's support requirements.
	 */
	abstract private function canBeSupportedAt(Block $block) : bool;

	/**
	 * @see Block::canBePlacedAt()
	 */
	public function canBePlacedAt(Block $blockReplace, Vector3 $clickVector, int $face, bool $isClickedBlock) : bool{
		return $this->canBeSupportedAt($blockReplace) && parent::canBePlacedAt($blockReplace, $clickVector, $face, $isClickedBlock);
	}

	/**
	 * @see Block::onNearbyBlockChange()
	 */
	public function onNearbyBlockChange() : void{
		if(!$this->canBeSupportedAt($this)){
			$this->position->getWorld()->useBreakOn($this->position);
		}else{
			parent::onNearbyBlockChange();
		}
	}
}