CeilingEdgesHangingSign.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\HorizontalFacing;
use pocketmine\block\utils\HorizontalFacingTrait;
use pocketmine\block\utils\SupportType;
use pocketmine\item\Item;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\world\BlockTransaction;
 
final class CeilingEdgesHangingSign extends BaseSign implements HorizontalFacing{
    use HorizontalFacingTrait;
 
    protected function getSupportingFace() : int{
        return Facing::UP;
    }
 
    public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
        if($face !== Facing::DOWN){
            return false;
        }
        if($player !== null){
            $this->facing = Facing::opposite($player->getHorizontalFacing());
        }
        if(!$this->canBeSupportedAt($blockReplace)){
            return false;
        }
 
        return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
    }
 
    public function onNearbyBlockChange() : void{
        if(!$this->canBeSupportedAt($this)){
            $this->position->getWorld()->useBreakOn($this->position);
        }
    }
 
    private function canBeSupportedAt(Block $block) : bool{
        $supportBlock = $block->getSide(Facing::UP);
        return
            $supportBlock->getSupportType(Facing::DOWN) === SupportType::FULL ||
            (($supportBlock instanceof WallHangingSign || $supportBlock instanceof CeilingEdgesHangingSign) && Facing::axis($supportBlock->getFacing()) === Facing::axis($this->facing));
    }
}