filesystemview.php

<?php

/**
 * ownCloud
 *
 * @author Frank Karlitschek
 * @copyright 2012 Frank Karlitschek frank@owncloud.org
 *
 * 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 to provide access to ownCloud filesystem via a "view", and methods for
 * working with files within that view (e.g. read, write, delete, etc.). Each
 * view is restricted to a set of directories via a virtual root. The default view
 * uses the currently logged in user's data directory as root (parts of
 * OC_Filesystem are merely a wrapper for OC_FilesystemView).
 *
 * Apps that need to access files outside of the user data folders (to modify files
 * belonging to a user other than the one currently logged in, for example) should
 * use this class directly rather than using OC_Filesystem, or making use of PHP's
 * built-in file manipulation functions. This will ensure all hooks and proxies
 * are triggered correctly.
 *
 * Filesystem functions are not called directly; they are passed to the correct
 * OC_Filestorage object
 */

class OC_FilesystemView {
	private $fakeRoot='';
	private $internal_path_cache=array();
	private $storage_cache=array();

	public function __construct($root) {
		$this->fakeRoot=$root;
	}

	public function getAbsolutePath($path) {
		if(!$path){
			$path='/';
		}
		if($path[0]!=='/'){
			$path='/'.$path;
		}
		return $this->fakeRoot.$path;
	}

	/**
	* change the root to a fake toor
	* @param  string  fakeRoot
	* @return bool
	*/
	public function chroot($fakeRoot) {
		if(!$fakeRoot==''){
			if($fakeRoot[0]!=='/') {
				$fakeRoot='/'.$fakeRoot;
			}
		}