owncloud/core

<?php
/**
 * @author Thomas Müller <thomas.mueller@tmit.eu>
 *
 * @copyright Copyright (c) 2017, ownCloud GmbH
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * 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, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *
 */

namespace OCA\DAV\Meta;

use OCP\Files\File;
use OCP\Files\Folder;
use OCP\Files\Node;
use OCP\Files\IProvidesVersionAuthor;
use OCP\Files\IProvidesVersionTag;
use Sabre\DAV\Collection;

/**
 * Class MetaFolder
 * This is a Sabre based implementation of a folder living in the /meta resource.
 *
 * @package OCA\DAV\Meta
 */
class MetaFolder extends Collection {
    /** @var Folder */
    private $folder;

    /**
     * MetaFolder constructor.
     *
     * @param Folder $folder
     */
    public function __construct(Folder $folder) {
        $this->folder = $folder;
    }

    /**
     * @inheritdoc
     */
    public function getChildren() {
        $nodes = $this->folder->getDirectoryListing();
        return \array_map(function ($node) {
            return $this->nodeFactory($node);
        }, $nodes);
    }

    /**
     * @inheritdoc
     */
    public function getName() {
        return $this->folder->getName();
    }

    private function nodeFactory(Node $node) {
        if ($node instanceof Folder) {
            return new MetaFolder($node);
        }
        if ($node instanceof File) {
            return new MetaFile($node);
        }
        throw new \InvalidArgumentException();
    }

    /**
     * @inheritdoc
     */
    public function getVersionEditedBy() : string {
        if ($this->folder instanceof IProvidesVersionAuthor) {
            return $this->folder->getEditedBy();
        }
        return '';
    }

    /**
     * @inheritdoc
     */
    public function getVersionTag() : string {
        if ($this->folder instanceof IProvidesVersionTag) {
            return $this->folder->getVersionTag();
        }
        return '';
    }
}