Light.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\runtime\RuntimeDataDescriber;
use pocketmine\item\Item;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
 
final class Light extends Flowable{
    public const MIN_LIGHT_LEVEL = 0;
    public const MAX_LIGHT_LEVEL = 15;
 
    private int $level = self::MAX_LIGHT_LEVEL;
 
    public function describeBlockItemState(RuntimeDataDescriber $w) : void{
        $w->boundedIntAuto(self::MIN_LIGHT_LEVEL, self::MAX_LIGHT_LEVEL, $this->level);
    }
 
    public function getLightLevel() : int{ return $this->level; }
 
    public function setLightLevel(int $level) : self{
        if($level < self::MIN_LIGHT_LEVEL || $level > self::MAX_LIGHT_LEVEL){
            throw new \InvalidArgumentException("Light level must be in the range " . self::MIN_LIGHT_LEVEL . " ... " . self::MAX_LIGHT_LEVEL);
        }
        $this->level = $level;
        return $this;
    }
 
    public function canBeReplaced() : bool{ return true; }
 
    public function canBePlacedAt(Block $blockReplace, Vector3 $clickVector, int $face, bool $isClickedBlock) : bool{
        //light blocks behave like solid blocks when placing them on another light block
        return $blockReplace->canBeReplaced() && $blockReplace->getTypeId() !== $this->getTypeId();
    }
 
    public function onInteract(Item $item, int $face, Vector3 $clickVector, ?Player $player = null, array &$returnedItems = []) : bool{
        $this->level = $this->level === self::MAX_LIGHT_LEVEL ?
            self::MIN_LIGHT_LEVEL :
            $this->level + 1;
 
        $this->position->getWorld()->setBlock($this->position, $this);
 
        return true;
    }
}