<?php
  /**
  * ownCloud
  *
  * @author Michael Gapczynski
  * @copyright 2012 Michael Gapczynski mtgap@owncloud.com
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
  * License as published by the Free Software Foundation; either
  * version 3 of the License, or any later version.
  *
  * This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  class OC_Share_Backend_Folder extends OC_Share_Backend_File implements OCP\Share_Backend_Collection {
  
  	public function getChildren($itemSource) {
  		$children = array();
  		$parents = array($itemSource);
  		$query = \OC_DB::prepare('SELECT `id` FROM `*PREFIX*mimetypes` WHERE `mimetype` = ?');
  		$result = $query->execute(array('httpd/unix-directory'));
  		if ($row = $result->fetchRow()) {
  			$mimetype = $row['id'];
  		} else {
  			$mimetype = -1;
  		}
  		while (!empty($parents)) {
  			$parents = "'".implode("','", $parents)."'";
  			$query = OC_DB::prepare('SELECT `fileid`, `name`, `mimetype` FROM `*PREFIX*filecache`'
  				.' WHERE `parent` IN ('.$parents.')');
  			$result = $query->execute();
  			$parents = array();
  			while ($file = $result->fetchRow()) {
  				$children[] = array('source' => $file['fileid'], 'file_path' => $file['name']);
  				// If a child folder is found look inside it
  				if ($file['mimetype'] == $mimetype) {
  					$parents[] = $file['fileid'];
  				}
  			}
  		}
  		return $children;
  	}
  
  }