CreativeInventoryCache.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\network\mcpe\cache;
 
use pocketmine\inventory\CreativeInventory;
use pocketmine\network\mcpe\convert\TypeConverter;
use pocketmine\network\mcpe\protocol\CreativeContentPacket;
use pocketmine\network\mcpe\protocol\types\inventory\CreativeContentEntry;
use pocketmine\utils\SingletonTrait;
use function spl_object_id;
 
final class CreativeInventoryCache{
    use SingletonTrait;
 
    private array $caches = [];
 
    public function getCache(CreativeInventory $inventory) : CreativeContentPacket{
        $id = spl_object_id($inventory);
        if(!isset($this->caches[$id])){
            $inventory->getDestructorCallbacks()->add(function() use ($id) : void{
                unset($this->caches[$id]);
            });
            $inventory->getContentChangedCallbacks()->add(function() use ($id) : void{
                unset($this->caches[$id]);
            });
            $this->caches[$id] = $this->buildCreativeInventoryCache($inventory);
        }
        return $this->caches[$id];
    }
 
    private function buildCreativeInventoryCache(CreativeInventory $inventory) : CreativeContentPacket{
        $entries = [];
        $typeConverter = TypeConverter::getInstance();
        //creative inventory may have holes if items were unregistered - ensure network IDs used are always consistent
        foreach($inventory->getAll() as $k => $item){
            $entries[] = new CreativeContentEntry($k, $typeConverter->coreItemStackToNet($item));
        }
 
        return CreativeContentPacket::create($entries);
    }
}