<?php
  /**
   * ownCloud - CardDAV plugin
   *
   * The CardDAV plugin adds CardDAV functionality to the WebDAV server
   *
   * @author Thomas Tanghus

   * @copyright 2013-2014 Thomas Tanghus (thomas@tanghus.net)

   *
   * 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 OCA\Contacts\CardDAV;
  
  use Sabre\VObject;
  use OCA\Contacts\VObject\VCard;
  
  /**

   * This class overrides \Sabre\CardDAV\Plugin::validateVCard() to be able

   * to import partially invalid vCards by ignoring invalid lines and to
   * validate and upgrade using \OCA\Contacts\VCard.
  */

  class Plugin extends \Sabre\CardDAV\Plugin {

  
  	/**
  	* Checks if the submitted vCard data is in fact, valid.
  	*
  	* An exception is thrown if it's not.
  	*
  	* @param resource|string $data
  	* @return void
  	*/
  	protected function validateVCard(&$data) {
  
  		// If it's a stream, we convert it to a string first.
  		if (is_resource($data)) {
  			$data = stream_get_contents($data);

  		} elseif (!is_string($data)) {
  			throw new \Exception(__METHOD__ . ' argument 1 only supports string or stream resource.');

  		}
  
  		try {
  			$vobj = VObject\Reader::read($data, VObject\Reader::OPTION_IGNORE_INVALID_LINES);
  		} catch (VObject\ParseException $e) {

  			throw new \Sabre\DAV\Exception\UnsupportedMediaType('This resource only supports valid vcard data. Parse error: ' . $e->getMessage());

  		}
  
  		if ($vobj->name !== 'VCARD') {

  			throw new \Sabre\DAV\Exception\UnsupportedMediaType('This collection can only support vcard objects.');

  		}
  
  		$vobj->validate(VCard::REPAIR|VCard::UPGRADE);
  		$data = $vobj->serialize();
  	}

  }