ConcretePowder.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\block\utils\BlockEventHelper;
use pocketmine\block\utils\Colored;
use pocketmine\block\utils\ColoredTrait;
use pocketmine\block\utils\Fallable;
use pocketmine\block\utils\FallableTrait;
use pocketmine\math\Facing;
 
class ConcretePowder extends Opaque implements Fallable, Colored{
    use ColoredTrait;
    use FallableTrait {
        onNearbyBlockChange as protected startFalling;
    }
 
    public function onNearbyBlockChange() : void{
        if(($water = $this->getAdjacentWater()) !== null){
            BlockEventHelper::form($this, VanillaBlocks::CONCRETE()->setColor($this->color), $water);
        }else{
            $this->startFalling();
        }
    }
 
    public function tickFalling() : ?Block{
        if($this->getAdjacentWater() === null){
            return null;
        }
        return VanillaBlocks::CONCRETE()->setColor($this->color);
    }
 
    private function getAdjacentWater() : ?Water{
        foreach(Facing::ALL as $i){
            if($i === Facing::DOWN){
                continue;
            }
            $block = $this->getSide($i);
            if($block instanceof Water){
                return $block;
            }
        }
 
        return null;
    }
}