<?php
/**
 * Copyright since 2007 PrestaShop SA and Contributors
 * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.md.
 * It is also available through the world-wide-web at this URL:
 * https://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to https://devdocs.prestashop.com/ for more information.
 *
 * @author    PrestaShop SA and Contributors <contact@prestashop.com>
 * @copyright Since 2007 PrestaShop SA and Contributors
 * @license   https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 */

namespace PrestaShop\PrestaShop\Core\Proxy;

use PrestaShop\PrestaShop\Core\File\FileFinderInterface;

/**
 * Class CachedFileFinderProxy is a local cache proxy of file finder.
 */
final class CachedFileFinderProxy implements FileFinderInterface
{
    /**
     * @var FileFinderInterface
     */
    private $delegate;

    /**
     * @var array
     */
    private $filesCache;

    /**
     * @param FileFinderInterface $delegate instance of file finder
     */
    public function __construct(FileFinderInterface $delegate)
    {
        $this->delegate = $delegate;
    }

    /**
     * {@inheritdoc}
     */
    public function find()
    {
        if (null === $this->filesCache) {
            $this->filesCache = $this->delegate->find();
        }

        return $this->filesCache;
    }
}