Lantern.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\SupportType;
use pocketmine\data\runtime\RuntimeDataDescriber;
use pocketmine\item\Item;
use pocketmine\math\Axis;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\world\BlockTransaction;
 
class Lantern extends Transparent{
    private int $lightLevel; //readonly
 
    protected bool $hanging = false;
 
    public function __construct(BlockIdentifier $idInfo, string $name, BlockTypeInfo $typeInfo, int $lightLevel){
        $this->lightLevel = $lightLevel;
        parent::__construct($idInfo, $name, $typeInfo);
    }
 
    protected function describeBlockOnlyState(RuntimeDataDescriber $w) : void{
        $w->bool($this->hanging);
    }
 
    public function isHanging() : bool{ return $this->hanging; }
 
    public function setHanging(bool $hanging) : self{
        $this->hanging = $hanging;
        return $this;
    }
 
    public function getLightLevel() : int{
        return $this->lightLevel;
    }
 
    protected function recalculateCollisionBoxes() : array{
        return [
            AxisAlignedBB::one()
                ->trim(Facing::UP,   $this->hanging ? 6 / 16 : 8 / 16)
                ->trim(Facing::DOWN, $this->hanging ? 2 / 16 : 0)
                ->squash(Axis::X, 5 / 16)
                ->squash(Axis::Z, 5 / 16)
        ];
    }
 
    public function getSupportType(int $facing) : SupportType{
        return SupportType::NONE;
    }
 
    public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
        $downSupport = $this->canBeSupportedAt($blockReplace, Facing::DOWN);
        if(!$downSupport && !$this->canBeSupportedAt($blockReplace, Facing::UP)){
            return false;
        }
 
        $this->hanging = $face === Facing::DOWN || !$downSupport;
        return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
    }
 
    public function onNearbyBlockChange() : void{
        $face = $this->hanging ? Facing::UP : Facing::DOWN;
        if(!$this->canBeSupportedAt($this, $face)){
            $this->position->getWorld()->useBreakOn($this->position);
        }
    }
 
    private function canBeSupportedAt(Block $block, int $face) : bool{
        return $block->getAdjacentSupportType($face)->hasCenterSupport();
    }
}