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<?php
/**
* Extended CardDAV plugin for the Kolab DAV server
*
* @author Thomas Bruederli <bruederli@kolabsys.com>
*
* Copyright (C) 2013, Kolab Systems AG <contact@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
namespace Kolab\CardDAV;
use Sabre\DAV;
use Sabre\CardDAV;
use Sabre\VObject;
/**
* Extended CardDAV plugin to tweak data validation
*/
class Plugin extends CardDAV\Plugin
{
// make already parsed vcard blocks available for later use
public static $parsed_vcard;
// allow the backend to force a redirect Location
public static $redirect_basename;
/**
* Initializes the plugin
*
* @param DAV\Server $server
* @return void
*/
public function initialize(DAV\Server $server)
{
parent::initialize($server);
$server->subscribeEvent('afterCreateFile', array($this, 'afterWriteContent'));
$server->subscribeEvent('afterWriteContent', array($this, 'afterWriteContent'));
}
/**
* Inject some additional HTTP response headers
*/
public function afterWriteContent($uri, $node)
{
// send Location: header to corrected URI
if (self::$redirect_basename) {
$path = explode('/', $uri);
array_pop($path);
array_push($path, self::$redirect_basename);
$this->server->httpResponse->setHeader('Location', $this->server->getBaseUri() . join('/', array_map('urlencode', $path)));
self::$redirect_basename = null;
}
}
/**
* Checks if the submitted iCalendar 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);
}
// Converting the data to unicode, if needed.
$data = DAV\StringUtil::ensureUTF8($data);
try {
VObject\Property::$classMap['REV'] = 'Sabre\\VObject\\Property\\DateTime';
$vobj = VObject\Reader::read($data, VObject\Reader::OPTION_FORGIVING | VObject\Reader::OPTION_IGNORE_INVALID_LINES);
if ($vobj->name == 'VCARD')
$this->parsed_vcard = $vobj;
}
catch (VObject\ParseException $e) {
throw new DAV\Exception\UnsupportedMediaType('This resource only supports valid vcard data. Parse error: ' . $e->getMessage());
}
if ($vobj->name !== 'VCARD') {
throw new DAV\Exception\UnsupportedMediaType('This collection can only support vcard objects.');
}
if (!isset($vobj->UID)) {
throw new DAV\Exception\BadRequest('Every vcard must have a UID.');
}
}
}
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