<?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/>.
  */
  namespace OC\Files\Cache;
  
  class Shared_Permissions extends Permissions {
  
  	/**
  	 * get the permissions for a single file
  	 *
  	 * @param int $fileId
  	 * @param string $user
  	 * @return int (-1 if file no permissions set)
  	 */
  	public function get($fileId, $user) {
  		if ($fileId == -1) {
  			return \OCP\PERMISSION_READ;
  		}
  		$source = \OCP\Share::getItemSharedWithBySource('file', $fileId, \OC_Share_Backend_File::FORMAT_SHARED_STORAGE,
  			null, true);
  		if ($source) {
  			return $source['permissions'];
  		} else {
  			return -1;
  		}
  	}
  
  	/**
  	 * set the permissions of a file
  	 *
  	 * @param int $fileId
  	 * @param string $user
  	 * @param int $permissions
  	 */
  	public function set($fileId, $user, $permissions) {
  		// Not a valid action for Shared Permissions
  	}
  
  	/**
  	 * get the permissions of multiply files
  	 *
  	 * @param int[] $fileIds
  	 * @param string $user
  	 * @return int[]
  	 */
  	public function getMultiple($fileIds, $user) {
  		if (count($fileIds) === 0) {
  			return array();
  		}
  		foreach ($fileIds as $fileId) {
  			$filePermissions[$fileId] = self::get($fileId, $user);
  		}
  		return $filePermissions;
  	}
  
  	/**
  	 * get the permissions for all files in a folder
  	 *
  	 * @param int $parentId
  	 * @param string $user
  	 * @return int[]
  	 */
  	public function getDirectoryPermissions($parentId, $user) {
  		// Root of the Shared folder
  		if ($parentId === -1) {
  			return \OCP\Share::getItemsSharedWith('file', \OC_Share_Backend_File::FORMAT_PERMISSIONS);
  		}
  		$permissions = $this->get($parentId, $user);
  		$query = \OC_DB::prepare('SELECT `fileid` FROM `*PREFIX*filecache` WHERE `parent` = ?');
  		$result = $query->execute(array($parentId));
  		$filePermissions = array();
  		while ($row = $result->fetchRow()) {
  			$filePermissions[$row['fileid']] = $permissions;
  		}
  		return $filePermissions;
  	}
  
  	/**
  	 * remove the permissions for a file
  	 *
  	 * @param int $fileId
  	 * @param string $user
  	 */
  	public function remove($fileId, $user = null) {
  		// Not a valid action for Shared Permissions
  	}
  
  	public function removeMultiple($fileIds, $user) {
  		// Not a valid action for Shared Permissions
  	}

  }