<?php
  /**
   * Copyright (c) 2013 Vincent Petry <pvince81@owncloud.com>
   * This file is licensed under the Affero General Public License version 3 or
   * later.
   * See the COPYING-README file.
   */
  
  namespace OC\Files\Storage;
  
  /**
   * ownCloud backend for external storage based on DAV backend.
   *
   * The ownCloud URL consists of three parts:
   * http://%host/%context/remote.php/webdav/%root
   *
   */
  class OwnCloud extends \OC\Files\Storage\DAV{
  	const OC_URL_SUFFIX = 'remote.php/webdav';
  
  	public function __construct($params) {
  		// extract context path from host if specified
  		// (owncloud install path on host)
  		$host = $params['host'];
  		$contextPath = '';
  		$hostSlashPos = strpos($host, '/');
  		if ($hostSlashPos !== false){
  			$contextPath = substr($host, $hostSlashPos);
  			$host = substr($host, 0, $hostSlashPos);
  		}
  
  		if (substr($contextPath , 1) !== '/'){
  			$contextPath .= '/';
  		}
  
  		if (isset($params['root'])){
  			$root = $params['root'];
  			if (substr($root, 1) !== '/'){
  				$root = '/' . $root;
  			}
  		}
  		else{
  			$root = '/';
  		}
  
  		$params['host'] = $host;
  		$params['root'] = $contextPath . self::OC_URL_SUFFIX . $root;
  
  		parent::__construct($params);
  	}
  }