<?php

declare(strict_types=1);

/**
 * @copyright 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @author 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

namespace OCA\Recommendations\Service;

use OCP\Files\Node;
use OCP\Files\StorageNotAvailableException;
use OCP\IL10N;
use OCP\IServerContainer;
use OCP\IUser;

class RecentlyEditedFilesSource implements IRecommendationSource {

	/** @var IServerContainer */
	private $serverContainer;

	/** @var IL10N */
	private $l10n;

	public function __construct(IServerContainer $serverContainer,
								IL10N $l10n) {
		$this->serverContainer = $serverContainer;
		$this->l10n = $l10n;
	}

	/**
	 * @return array
	 */
	public function getMostRecentRecommendation(IUser $user, int $max): array {
		$userFolder = $this->serverContainer->getUserFolder($user->getUID());

		return array_filter(array_map(function (Node $node) use ($userFolder) {
			try {
				$parentPath = dirname($node->getPath());
				if ($parentPath === '' || $parentPath === '.' || $parentPath === '/') {
					$parentPath = $node->getParent()->getPath();
				}
				return new RecommendedFile(
					$userFolder->getRelativePath($parentPath),
					$node,
					$node->getMTime(),
					$this->l10n->t("Recently edited")
				);
			} catch (StorageNotAvailableException $e) {
				return null;
			}
		}, $userFolder->getRecent($max)), function ($entry) {
			return $entry !== null;
		});
	}
}
