use Nette\Caching\Cache;
use Nette\Caching\IStorage;

class ProductStorage
{

    protected $cache;

    /**
     * @var Product
     */
    private $repository;

    /**
     * @var Product|NULL
     */
    private $product = NULL;


    public function __construct(IStorage $storage, \Patie\Eshop\Model\ProductRepository $repository)
    {
        $this->repository = $repository;
        $this->cache = new Cache($storage);
    }


    public function getProduct($id)
    {

        $this->product = $this->cache->load($id);
        if ($this->product === NULL) {
            if (!$dbProduct = $this->repository->find($id)) {
                return NULL;
            }

            $product = (object)array(
                'id' => $dbProduct->id,
                'name' => $dbProduct->name,
            );

            $this->product = $this->cache->save($product->id, $product, array(
                Cache::TAGS => array("product/" . $product->id),
            ));

        }

        return $this->product;

    }
}