forked from extern/egroupware
414 lines
13 KiB
PHP
414 lines
13 KiB
PHP
<?php
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/**
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* eGroupWare: GroupDAV access: calendar handler
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*
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* @link http://www.egroupware.org
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package calendar
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* @subpackage groupdav
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright (c) 2007/8 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @version $Id$
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*/
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/**
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* eGroupWare: GroupDAV access: calendar handler
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*/
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class calendar_groupdav extends groupdav_handler
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{
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/**
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* bo class of the application
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*
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* @var calendar_boupdate
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*/
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var $bo;
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var $filter_prop2cal = array(
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'SUMMARY' => 'cal_title',
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'UID' => 'cal_uid',
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'DTSTART' => 'cal_start',
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'DTEND' => 'cal_end',
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// 'DURATION'
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//'RRULE' => 'recur_type',
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//'RDATE' => 'cal_start',
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//'EXRULE'
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//'EXDATE'
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//'RECURRENCE-ID'
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);
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/**
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* Constructor
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*
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* @param string $app 'calendar', 'addressbook' or 'infolog'
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* @param int $debug=null debug-level to set
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* @param string $base_uri=null base url of handler
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*/
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function __construct($app,$debug=null,$base_uri=null)
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{
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parent::__construct($app,$debug,$base_uri);
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$this->bo =& new calendar_boupdate();
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}
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const PATH_ATTRIBUTE = 'id';
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/**
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* Create the path for an event
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*
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* @param array|int $event
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* @return string
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*/
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static function get_path($event)
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{
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if (is_numeric($event) && self::PATH_ATTRIBUTE == 'id')
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{
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$name = $event;
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}
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else
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{
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if (!is_array($event)) $event = $this->bo->read($event);
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$name = $event[self::PATH_ATTRIBUTE];
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}
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return '/calendar/'.$name.'.ics';
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}
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/**
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* Handle propfind in the calendar folder
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*
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* @param string $path
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* @param array $options
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* @param array &$files
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* @param int $user account_id
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* @param string $id=''
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* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
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*/
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function propfind($path,$options,&$files,$user,$id='')
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{
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if ($this->debug) error_log(__METHOD__."($path,".array2string($options).",,$user,$id)");
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// ToDo: add parameter to only return id & etag
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$cal_filters = array(
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'users' => $user,
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'start' => time()-30*24*3600, // default one month back
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'end' => time()+365*24*3600, // default one year into the future
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'enum_recuring' => false,
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'daywise' => false,
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'date_format' => 'server',
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);
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if ($this->debug > 1) error_log(__METHOD__."($path,,,$user,$id) cal_filters=".array2string($cal_filters));
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// process REPORT filters or multiget href's
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if (($id || $options['root']['name'] != 'propfind') && !$this->_report_filters($options,$cal_filters,$id))
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{
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return false;
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}
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// check if we have to return the full calendar data or just the etag's
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if (!($calendar_data = $options['props'] == 'all' && $options['root']['ns'] == groupdav::CALDAV) && is_array($options['props']))
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{
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foreach($options['props'] as $prop)
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{
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if ($prop['name'] == 'calendar-data')
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{
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$calendar_data = true;
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break;
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}
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}
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}
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if (($events = $this->bo->search($cal_filters)))
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{
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foreach($events as $event)
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{
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//header('X-EGROUPWARE-EVENT-'.$event['id'].': '.$event['title'].': '.date('Y-m-d H:i:s',$event['start']).' - '.date('Y-m-d H:i:s',$event['end']));
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$props = array(
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HTTP_WebDAV_Server::mkprop('getetag',$this->get_etag($event)),
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HTTP_WebDAV_Server::mkprop('getcontenttype', $this->agent != 'kde' ?
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'text/calendar; charset=utf-8; component=VEVENT' : 'text/calendar'),
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// getlastmodified and getcontentlength are required by WebDAV and Cadaver eg. reports 404 Not found if not set
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HTTP_WebDAV_Server::mkprop('getlastmodified', $event['modified']),
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);
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if ($calendar_data)
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{
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if (is_null($handler)) $handler = $this->_get_handler();
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$content = $handler->exportVCal(array($event),'2.0','PUBLISH');
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$props[] = HTTP_WebDAV_Server::mkprop('getcontentlength',bytes($content));
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$props[] = HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-data',$content);
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}
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else
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{
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$props[] = HTTP_WebDAV_Server::mkprop('getcontentlength', ''); // expensive to calculate and no CalDAV client uses it
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}
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$files['files'][] = array(
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'path' => self::get_path($event),
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'props' => $props,
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);
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}
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}
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return true;
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}
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/**
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* Process the filters from the CalDAV REPORT request
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*
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* @param array $options
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* @param array &$cal_filters
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* @param string $id
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* @return boolean true if filter could be processed, false for requesting not here supported VTODO items
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*/
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function _report_filters($options,&$cal_filters,$id)
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{
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if ($options['filters'])
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{
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// unset default start & end
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$cal_start = $cal_filters['start']; unset($cal_filters['start']);
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$cal_end = $cal_filters['end']; unset($cal_filters['end']);
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$num_filters = count($cal_filters);
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foreach($options['filters'] as $filter)
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{
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switch($filter['name'])
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{
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case 'comp-filter':
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if ($this->debug > 1) error_log(__METHOD__."($path,...) comp-filter='{$filter['attrs']['name']}'");
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switch($filter['attrs']['name'])
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{
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case 'VTODO':
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return false; // return nothing for now, todo: check if we can pass it on to the infolog handler
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// todos are handled by the infolog handler
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$infolog_handler = new groupdav_infolog();
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return $infolog_handler->propfind($path,$options,$files,$user,$method);
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case 'VCALENDAR':
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CASE 'VEVENT':
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break; // that's our default anyway
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}
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break;
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case 'prop-filter':
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if ($this->debug > 1) error_log(__METHOD__."($path,...) prop-filter='{$filter['attrs']['name']}'");
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$prop_filter = $filter['attrs']['name'];
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break;
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case 'text-match':
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if ($this->debug > 1) error_log(__METHOD__."($path,...) text-match: $prop_filter='{$filter['data']}'");
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if (!isset($this->filter_prop2cal[strtoupper($prop_filter)]))
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{
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if ($this->debug) error_log(__METHOD__."($path,".array2string($options).",,$user) unknown property '$prop_filter' --> ignored");
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}
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else
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{
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$cal_filters['query'][$this->filter_prop2cal[strtoupper($prop_filter)]] = $filter['data'];
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}
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unset($prop_filter);
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break;
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case 'param-filter':
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if ($this->debug) error_log(__METHOD__."($path,...) param-filter='{$filter['attrs']['name']}' not (yet) implemented!");
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break;
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case 'time-range':
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if ($this->debug > 1) error_log(__METHOD__."($path,...) time-range={$filter['attrs']['start']}-{$filter['attrs']['end']}");
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$cal_filters['start'] = $filter['attrs']['start'];
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$cal_filters['end'] = $filter['attrs']['end'];
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break;
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default:
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if ($this->debug) error_log(__METHOD__."($path,".array2string($options).",,$user) unknown filter --> ignored");
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break;
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}
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}
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if (count($cal_filters) == $num_filters) // no filters set --> restore default start and end time
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{
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$cal_filters['start'] = $cal_start;
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$cal_filters['end'] = $cal_end;
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}
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}
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// multiget or propfind on a given id
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if ($options['root']['name'] == 'calendar-multiget' || $id)
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{
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// no standard time-range!
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unset($cal_filters['start']);
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unset($cal_filters['end']);
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$ids = array();
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if ($id)
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{
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if (is_numeric($id))
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{
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$ids[] = (int)$id;
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}
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else
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{
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$cal_filters['query']['cal_uid'] = basename($id,'.ics');
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}
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}
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else // fetch all given url's
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{
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foreach($options['other'] as $option)
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{
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if ($option['name'] == 'href')
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{
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$parts = explode('/',$option['data']);
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if (is_numeric($id = basename(array_pop($parts),'.ics'))) $ids[] = $id;
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}
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}
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}
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if ($ids)
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{
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$cal_filters['query'][] = 'egw_cal.cal_id IN ('.implode(',',array_map(create_function('$n','return (int)$n;'),$ids)).')';
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}
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if ($this->debug) error_log(__METHOD__."($path,,,$user,$id) calendar-multiget: ids=".implode(',',$ids));
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}
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return true;
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}
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/**
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* Handle get request for an event
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*
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* @param array &$options
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* @param int $id
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* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
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*/
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function get(&$options,$id)
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{
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if (!is_array($event = $this->_common_get_put_delete('GET',$options,$id)))
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{
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return $event;
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}
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$handler = $this->_get_handler();
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$options['data'] = $handler->exportVCal(array($event),'2.0','PUBLISH');
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$options['mimetype'] = 'text/calendar; charset=utf-8';
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header('Content-Encoding: identity');
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header('ETag: '.$this->get_etag($event));
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return true;
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}
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/**
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* Handle put request for an event
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*
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* @param array &$options
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* @param int $id
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* @param int $user=null account_id of owner, default null
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* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
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*/
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function put(&$options,$id,$user=null)
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{
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$return_no_access=true; // as handled by importVCal anyway and allows it to set the status for participants
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$event = $this->_common_get_put_delete('PUT',$options,$id,$return_no_access);
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if (!is_null($event) && !is_array($event))
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{
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return $event;
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}
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$handler = $this->_get_handler();
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if (!($cal_id = $handler->importVCal($options['content'],is_numeric($id) ? $id : -1,
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self::etag2value($this->http_if_match))))
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{
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if ($this->debug) error_log(__METHOD__."(,$id) importVCal($options[content]) returned false");
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return '403 Forbidden';
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}
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header('ETag: '.$this->get_etag($cal_id));
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if (is_null($event) || !$return_no_access) // let lightning think the event is added
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{
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if ($this->debug) error_log(__METHOD__."(,$id,$user) cal_id=$cal_id, is_null(\$event)=".(int)is_null($event));
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header('Location: '.$this->base_uri.self::get_path($cal_id));
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return '201 Created';
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}
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return true;
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}
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/**
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* Handle delete request for an event
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*
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* If current user has no right to delete the event, but is an attendee, we reject the event for him.
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*
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* @param array &$options
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* @param int $id
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* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
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*/
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function delete(&$options,$id)
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{
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$return_no_access=true; // to allow to check if current use is a participant and reject the event for him
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if (!is_array($event = $this->_common_get_put_delete('DELETE',$options,$id,$return_no_access)) || !$return_no_access)
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{
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if (!$return_no_access)
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{
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$ret = isset($event['participants'][$this->bo->user]) &&
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$this->bo->set_status($event,$this->bo->user,'R') ? true : '403 Forbidden';
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if ($this->debug) error_log(__METHOD__."(,$id) return_no_access=$return_no_access, event[participants]=".array2string($event['participants']).", user={$this->bo->user} --> return $ret");
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return $ret;
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}
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return $event;
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}
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return $this->bo->delete($id);
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}
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/**
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* Read an entry
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*
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* @param string/id $id
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* @return array/boolean array with entry, false if no read rights, null if $id does not exist
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*/
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function read($id)
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{
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return $this->bo->read($id,null,false,'server');
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}
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/**
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* Get the etag for an entry, reimplemented to include the participants and stati in the etag
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*
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* @param array/int $event array with event or cal_id
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* @return string/boolean string with etag or false
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*/
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function get_etag($entry)
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{
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$e_in = $entry;
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if (!is_array($entry))
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{
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$entry = $this->read($entry);
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}
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if (!$entry['id'] || !isset($entry['etag']) || !isset($entry['participants'])) error_log(__METHOD__."($e_in): id=$entry[id], etag=$entry[etag], isset(participants)=".(int)isset($entry['participants']).", title=$entry[title]: id, etag or participants not set!!!");
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$etag = $entry['id'].':'.$entry['etag'];
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// add a hash over the participants and their stati
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ksort($entry['participants']); // create a defined order
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$etag .= ':'.md5(serialize($entry['participants']));
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//error_log(__METHOD__."($entry[id] ($entry[etag]): $entry[title] --> etag=$etag");
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return $etag;
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}
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/**
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* Check if user has the neccessary rights on an event
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*
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* @param int $acl EGW_ACL_READ, EGW_ACL_EDIT or EGW_ACL_DELETE
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* @param array/int $event event-array or id
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* @return boolean null if entry does not exist, false if no access, true if access permitted
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*/
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function check_access($acl,$event)
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{
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return $this->bo->check_perms($acl,$event,0,'server');
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}
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/**
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* Add extra properties for calendar collections
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*
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* @param array $props=array() regular props by the groupdav handler
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* @return array
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*/
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static function extra_properties(array $props=array())
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{
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// calendaring URL of the current user
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$props[] = HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-home-set',$_SERVER['SCRIPT_NAME'].'/');
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// email of the current user, see caldav-sheduling draft
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$props[] = HTTP_WebDAV_Server::mkprop(groupdav::CALDAV,'calendar-user-address-set','MAILTO:'.$GLOBALS['egw_info']['user']['email']);
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return $props;
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}
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/**
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* Get the handler and set the supported fields
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*
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* @return calendar_ical
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*/
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private function _get_handler()
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{
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$handler =& new calendar_ical();
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$handler->setSupportedFields('GroupDAV',$this->agent);
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return $handler;
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}
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} |