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egroupware/calendar/inc/class.calendar_groupdav.inc.php

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<?php
/**
* EGroupware: CalDAV/CardDAV/GroupDAV access: Calendar handler
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package calendar
* @subpackage caldav
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2007-16 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @version $Id$
*/
use EGroupware\Api;
use EGroupware\Api\Acl;
/**
* CalDAV/CardDAV/GroupDAV access: Calendar handler
*
* Permanent error_log() calls should use $this->caldav->log($str) instead, to be send to PHP error_log()
* and our request-log (prefixed with "### " after request and response, like exceptions).
*
* @ToDo: new properties on calendars and it's ressources specially from sharing:
* - for the invite property: 5.2.2 in https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
* - https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-schedulingchanges.txt
*/
class calendar_groupdav extends Api\CalDAV\Handler
{
/**
* bo class of the application
*
* @var calendar_boupdate
*/
var $bo;
/**
* vCalendar Instance for parsing
*
* @var Horde_Icalendar
*/
var $vCalendar;
var $filter_prop2cal = array(
'SUMMARY' => 'cal_title',
'UID' => 'cal_uid',
'DTSTART' => 'cal_start',
'DTEND' => 'cal_end',
// 'DURATION'
//'RRULE' => 'recur_type',
//'RDATE' => 'cal_start',
//'EXRULE'
//'EXDATE'
//'RECURRENCE-ID'
);
/**
* Does client understand exceptions to be included in VCALENDAR component of series master sharing its UID
*
* That also means no EXDATE for these exceptions!
*
* Setting it to false, should give the old behavior used in 1.6 (hopefully) no client needs that.
*
* @var boolean
*/
var $client_shared_uid_exceptions = true;
/**
* Enable or disable Schedule-Tag handling:
* - return Schedule-Tag header in PUT response
* - update only status and alarms of calendar owner, if If-Schedule-Tag-Match header in PUT
*
* Disabling Schedule-Tag for iCal, as current implementation seems to create too much trouble :-(
* - iCal on OS X always uses If-Schedule-Tag-Match, even if other stuff in event is changed (eg. title)
* - iCal on iOS allways uses both If-Schedule-Tag-Match and If-Match (ETag)
* - Lighting 1.0 is NOT using it
*
* @var boolean
*/
var $use_schedule_tag = true;
/**
* Are we using id, uid or caldav_name for the path/url
*
* Get's set in constructor to 'caldav_name' and self::$path_extension = ''!
*/
static $path_attr = 'id';
/**
* Constructor
*
* @param string $app 'calendar', 'addressbook' or 'infolog'
* @param Api\CalDAV $caldav calling class
*/
function __construct($app, Api\CalDAV $caldav)
{
parent::__construct($app, $caldav);
$this->bo = new calendar_boupdate();
$this->vCalendar = new Horde_Icalendar;
// since 1.9.003 we allow clients to specify the URL when creating a new event, as specified by CalDAV
if (version_compare($GLOBALS['egw_info']['apps']['calendar']['version'], '1.9.003', '>='))
{
self::$path_attr = 'caldav_name';
self::$path_extension = '';
}
}
/**
* Get grants of current user and app
*
* Overwritten to return rights modified for certain user-agents (eg. Outlook CalDAV Synchroniser) in the consturctor.
*
* @return array user-id => Api\Acl::ADD|Api\Acl::READ|Api\Acl::EDIT|Api\Acl::DELETE pairs
*/
public function get_grants()
{
return $this->bo->grants;
}
/**
* Create the path for an event
*
* @param array|int $event
* @return string
*/
function get_path($event)
{
if (is_numeric($event) && self::$path_attr == 'id')
{
$name = $event;
}
else
{
if (!is_array($event)) $event = $this->bo->read($event);
$name = $event[self::$path_attr];
}
$name .= self::$path_extension;
//error_log(__METHOD__.'('.array2string($event).") path_attr='".self::$path_attr."', path_extension='".self::$path_extension."' returning ".array2string($name));
return $name;
}
const PAST_LIMIT = 100;
const FUTURE_LIMIT = 365;
/**
* Handle propfind in the calendar folder
*
* @param string $path
* @param array &$options
* @param array &$files
* @param int $user account_id
* @param string $id =''
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
function propfind($path,&$options,&$files,$user,$id='')
{
if ($this->debug)
{
error_log(__METHOD__."($path,".array2string($options).",,$user,$id)");
}
if ($options['root']['name'] == 'free-busy-query')
{
return $this->free_busy_report($path, $options, $user);
}
if (isset($_GET['download']))
{
$this->caldav->propfind_options['props'] = array(array(
'xmlns' => Api\CalDAV::CALDAV,
'name' => 'calendar-data',
));
}
// ToDo: add parameter to only return id & etag
$filter = array(
'users' => $user,
'enum_recuring' => false,
'daywise' => false,
'date_format' => 'server',
'no_total' => true, // we need no total number of rows (saves extra query)
'cfs' => array(), // return custom-fields, as we use them to store X- attributes
);
foreach(array(
'start' => $GLOBALS['egw_info']['user']['preferences']['groupdav']['calendar-past-limit'],
'end' => $GLOBALS['egw_info']['user']['preferences']['groupdav']['calendar-future-limit'],
) as $name => $value)
{
if (!is_numeric($value))
{
$value = $name == 'start' ? self::PAST_LIMIT : self::FUTURE_LIMIT;
}
$filter[$name] = $this->bo->now + 24*3600*($name == 'start' ? -1 : 1)*abs($value);
}
if ($this->client_shared_uid_exceptions) // do NOT return (non-virtual) exceptions
{
$filter['query'] = array('cal_reference' => 0);
}
if ($path == '/calendar/')
{
$filter['filter'] = 'owner';
}
// scheduling inbox, shows only not yet accepted or rejected events
elseif (substr($path,-7) == '/inbox/')
{
$filter['filter'] = 'unknown';
$filter['start'] = $this->bo->now; // only return future invitations
}
// ToDo: not sure what scheduling outbox is supposed to show, leave it empty for now
elseif (substr($path,-8) == '/outbox/')
{
return true;
}
else
{
$filter['filter'] = 'default'; // not rejected
}
// process REPORT filters or multiget href's
$nresults = null;
if (($id || $options['root']['name'] != 'propfind') && !$this->_report_filters($options, $filter, $id, $nresults))
{
// return empty collection, as iCal under iOS 5 had problems with returning "404 Not found" status
// when trying to request not supported components, eg. VTODO on a calendar collection
return true;
}
if ($id) $path = dirname($path).'/'; // caldav_name get's added anyway in the callback
if ($this->debug > 1)
{
error_log(__METHOD__."($path,,,$user,$id) filter=".array2string($filter));
}
// rfc 6578 sync-collection report: filter for sync-token is already set in _report_filters
if ($options['root']['name'] == 'sync-collection')
{
// callback to query sync-token, after propfind_callbacks / iterator is run and
// stored max. modification-time in $this->sync_collection_token
$files['sync-token'] = array($this, 'get_sync_collection_token');
$files['sync-token-params'] = array($path, $user);
$this->sync_collection_token = null;
$filter['order'] = 'cal_modified ASC'; // return oldest modifications first
$filter['sync-collection'] = true;
// no end-date / limit into the future, as unchanged entries would never be transferted later on
unset($filter['end']);
}
if (isset($nresults))
{
unset($filter['no_total']); // we need the total!
$files['files'] = $this->propfind_callback($path, $filter, array(0, (int)$nresults));
// hack to support limit with sync-collection report: events are returned in modified ASC order (oldest first)
// if limit is smaller then full result, return modified-1 as sync-token, so client requests next chunk incl. modified
// (which might contain further entries with identical modification time)
if ($options['root']['name'] == 'sync-collection' && $this->bo->total > $nresults)
{
--$this->sync_collection_token;
$files['sync-token-params'][] = true; // tel get_sync_collection_token that we have more entries
}
}
else
{
// return iterator, calling ourself to return result in chunks
$files['files'] = new Api\CalDAV\PropfindIterator($this,$path,$filter,$files['files']);
}
if (isset($_GET['download']))
{
$this->output_vcalendar($files['files']);
}
return true;
}
/**
* Download whole calendar as big ics file
*
* @param iterator|array $files
*/
function output_vcalendar($files)
{
// todo ETag logic with CTag to not download unchanged calendar again
Api\Header\Content::type('calendar.ics', 'text/calendar');
$n = 0;
foreach($files as $file)
{
if (!$n++) continue; // first entry is collection itself
$icalendar = $file['props']['calendar-data']['val'];
if (($start = strpos($icalendar, 'BEGIN:VEVENT')) !== false &&
($end = strrpos($icalendar, 'END:VCALENDAR')) !== false)
{
if ($n === 2)
{
// skip X-CALENDARSERVER-ACCESS:CONFIDENTIAL, as it is on VCALENDAR not VEVENT level
if (($x_calendarserver_access = strpos($icalendar, 'X-CALENDARSERVER-ACCESS:')) !== false)
{
echo substr($icalendar, 0, $x_calendarserver_access);
}
// skip timezones, as we would need to collect them from all events
// ans most clients understand timezone by reference anyway
elseif (($tz = strpos($icalendar, 'BEGIN:VTIMEZONE')) !== false)
{
echo substr($icalendar, 0, $tz);
}
else
{
echo substr($icalendar, 0, $start);
}
}
echo substr($icalendar, $start, $end-$start);
}
}
if ($icalendar && $end)
{
echo "END:VCALENDAR\n";
}
exit();
}
/**
* Callback for profind interator
*
* @param string $path
* @param array $filter
* @param array|boolean $start =false false=return all or array(start,num)
* @return array with "files" array with values for keys path and props
*/
function &propfind_callback($path,array $filter,$start=false)
{
if ($this->debug) $starttime = microtime(true);
$calendar_data = $this->caldav->prop_requested('calendar-data', Api\CalDAV::CALDAV, true);
if (!is_array($calendar_data)) $calendar_data = false; // not in allprop or autoindex
$files = array();
if (is_array($start))
{
$filter['offset'] = $start[0];
$filter['num_rows'] = $start[1];
}
$requested_multiget_ids = (array)$filter['query'][self::$path_attr];
$sync_collection = $filter['sync-collection'];
$events =& $this->bo->search($filter);
if ($events)
{
foreach($events as $event)
{
// remove event from requested multiget ids, to be able to report not found urls
if ($requested_multiget_ids && ($k = array_search($event[self::$path_attr], $requested_multiget_ids)) !== false)
{
unset($requested_multiget_ids[$k]);
}
// sync-collection report: deleted entries need to be reported without properties, same for rejected or deleted invitations
if ($sync_collection && ($event['deleted'] && !$event['cal_reference'] || in_array($event['participants'][$filter['users']][0], array('R','X'))))
{
$files[] = array('path' => $path.urldecode($this->get_path($event)));
continue;
}
$schedule_tag = null;
$etag = $this->get_etag($event, $schedule_tag);
//header('X-EGROUPWARE-EVENT-'.$event['id'].': '.$event['title'].': '.date('Y-m-d H:i:s',$event['start']).' - '.date('Y-m-d H:i:s',$event['end']));
$props = array(
'getcontenttype' => $this->agent != 'kde' ? 'text/calendar; charset=utf-8; component=VEVENT' : 'text/calendar',
'getetag' => '"'.$etag.'"',
'getlastmodified' => $event['modified'],
// user and timestamp of creation or last modification of event, used in calendarserver only for shared calendars
'created-by' => Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER, 'created-by',
$this->_created_updated_by_prop($event['creator'], $event['created'])),
'updated-by' => Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER, 'updated-by',
$this->_created_updated_by_prop($event['modifier'], $event['modified'])),
);
if ($this->use_schedule_tag)
{
$props['schedule-tag'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV, 'schedule-tag', '"'.$schedule_tag.'"');
}
//error_log(__FILE__ . __METHOD__ . "Calendar Data : $calendar_data");
if ($calendar_data)
{
$content = $this->iCal($event, $filter['users'],
strpos($path, '/inbox/') !== false ? 'REQUEST' : null,
!isset($calendar_data['children']['expand']) ? false :
($calendar_data['children']['expand']['attrs'] ? $calendar_data['children']['expand']['attrs'] : true));
$props['getcontentlength'] = bytes($content);
$props['calendar-data'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-data',$content);
}
/* Calendarserver reports new events with schedule-changes: action: create, which iCal request
* adding it, unfortunately does not lead to showing the new event in the users inbox
if (strpos($path, '/inbox/') !== false && $this->caldav->prop_requested('schedule-changes'))
{
$props['schedule-changes'] = Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER,'schedule-changes',array(
Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER,'dtstamp',gmdate('Ymd\THis',$event['created']).'Z'),
Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER,'action',array(
Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER,'create',''),
)),
));
}*/
$files[] = $this->add_resource($path, $event, $props);
}
}
// report not found multiget urls
if ($requested_multiget_ids)
{
foreach($requested_multiget_ids as $id)
{
$files[] = array('path' => $path.$id.self::$path_extension);
}
}
// sync-collection report --> return modified of last contact as sync-token
if ($sync_collection)
{
$this->sync_collection_token = $event['modified'];
}
if ($this->debug)
{
error_log(__METHOD__."($path) took ".(microtime(true) - $starttime).
' to return '.count($files['files']).' items');
}
return $files;
}
/**
* Return Calendarserver:(created|updated)-by sub-properties for a given user and time
*
* <created-by xmlns='http://calendarserver.org/ns/'>
* <first-name>Ralf</first-name>
* <last-name>Becker</last-name>
* <dtstamp>20121002T092006Z</dtstamp>
* <href xmlns='DAV:'>mailto:farktronix@me.com</href>
* </created-by>
*
* @param int $user
* @param int $time
* @return array with subprops
*/
private function _created_updated_by_prop($user, $time)
{
$props = array();
foreach(array(
'first-name' => 'account_firstname',
'last-name' => 'account_lastname',
'href' => 'account_email',
) as $prop => $name)
{
if ($user && ($val = $this->accounts->id2name($user, $name)))
{
$ns = Api\CalDAV::CALENDARSERVER;
if ($prop == 'href')
{
$ns = '';
$val = 'mailto:'.$val;
}
$props[$prop] = $ns ? Api\CalDAV::mkprop($ns, $prop, $val) : Api\CalDAV::mkprop($prop, $val);
}
}
if ($time)
{
$props['dtstamp'] = Api\CalDAV::mkprop(Api\CalDAV::CALENDARSERVER, 'dtstamp', gmdate('Ymd\\This\\Z', $time));
}
//error_log(__METHOD__."($user, $time) returning ".array2string($props));
return $props ? $props : '';
}
/**
* Process the filters from the CalDAV REPORT request
*
* @param array $options
* @param array &$cal_filters
* @param string $id
* @param int &$nresult on return limit for number or results or unchanged/null
* @return boolean true if filter could be processed
*/
function _report_filters($options, &$cal_filters, $id, &$nresults)
{
if ($options['filters'])
{
// unset default start & end
$cal_start = $cal_filters['start']; unset($cal_filters['start']);
$cal_end = $cal_filters['end']; unset($cal_filters['end']);
$num_filters = count($cal_filters);
foreach($options['filters'] as $filter)
{
switch($filter['name'])
{
case 'comp-filter':
if ($this->debug > 1) error_log(__METHOD__."($options[path],...) comp-filter='{$filter['attrs']['name']}'");
switch($filter['attrs']['name'])
{
case 'VTODO':
return false; // return nothing for now, todo: check if we can pass it on to the infolog handler
// todos are handled by the infolog handler
//$infolog_handler = new groupdav_infolog();
//return $infolog_handler->propfind($options['path'],$options,$options['files'],$user,$method);
case 'VCALENDAR':
case 'VEVENT':
break; // that's our default anyway
}
break;
case 'prop-filter':
if ($this->debug > 1) error_log(__METHOD__."($options[path],...) prop-filter='{$filter['attrs']['name']}'");
$prop_filter = $filter['attrs']['name'];
break;
case 'text-match':
if ($this->debug > 1) error_log(__METHOD__."($options[path],...) text-match: $prop_filter='{$filter['data']}'");
if (!isset($this->filter_prop2cal[strtoupper($prop_filter)]))
{
if ($this->debug) error_log(__METHOD__."($options[path],".array2string($options).",...) unknown property '$prop_filter' --> ignored");
}
else
{
$cal_filters['query'][$this->filter_prop2cal[strtoupper($prop_filter)]] = $filter['data'];
}
unset($prop_filter);
break;
case 'param-filter':
if ($this->debug) error_log(__METHOD__."($options[path],...) param-filter='{$filter['attrs']['name']}' not (yet) implemented!");
break;
case 'time-range':
if ($this->debug > 1) error_log(__FILE__ . __METHOD__."($options[path],...) time-range={$filter['attrs']['start']}-{$filter['attrs']['end']}");
if (!empty($filter['attrs']['start']))
{
$cal_filters['start'] = $this->vCalendar->_parseDateTime($filter['attrs']['start']);
}
if (!empty($filter['attrs']['end']))
{
$cal_filters['end'] = $this->vCalendar->_parseDateTime($filter['attrs']['end']);
}
break;
default:
if ($this->debug) error_log(__METHOD__."($options[path],".array2string($options).",...) unknown filter --> ignored");
break;
}
}
if (count($cal_filters) == $num_filters) // no filters set --> restore default start and end time
{
$cal_filters['start'] = $cal_start;
$cal_filters['end'] = $cal_end;
}
}
// parse limit from $options['other']
/* Example limit
<B:limit>
<B:nresults>10</B:nresults>
</B:limit>
*/
foreach((array)$options['other'] as $option)
{
switch($option['name'])
{
case 'nresults':
$nresults = (int)$option['data'];
//error_log(__METHOD__."(...) options[other]=".array2string($options['other'])." --> nresults=$nresults");
break;
case 'limit':
break;
case 'href':
break; // from addressbook-multiget, handled below
// rfc 6578 sync-report
case 'sync-token':
if (!empty($option['data']))
{
$parts = explode('/', $option['data']);
$sync_token = array_pop($parts);
$cal_filters['query'][] = 'cal_modified>'.(int)$sync_token;
$cal_filters['filter'] = 'everything'; // to return deleted entries too
// no standard time-range!
unset($cal_filters['start']);
}
break;
case 'sync-level':
if ($option['data'] != '1')
{
$this->caldav->log(__METHOD__."(...) only sync-level {$option['data']} requested, but only 1 supported! options[other]=".array2string($options['other']));
}
break;
default:
$this->caldav->log(__METHOD__."(...) unknown xml tag '{$option['name']}': options[other]=".array2string($options['other']));
break;
}
}
// multiget or propfind on a given id
//error_log(__FILE__ . __METHOD__ . "multiget of propfind:");
if ($options['root']['name'] == 'calendar-multiget' || $id)
{
// no standard time-range!
unset($cal_filters['start']);
unset($cal_filters['end']);
$ids = array();
if ($id)
{
$cal_filters['query'][self::$path_attr] = self::$path_extension ?
basename($id,self::$path_extension) : $id;
}
else // fetch all given url's
{
foreach($options['other'] as $option)
{
if ($option['name'] == 'href')
{
$parts = explode('/',$option['data']);
if (($id = urldecode(array_pop($parts))))
{
$cal_filters['query'][self::$path_attr][] = self::$path_extension ?
basename($id,self::$path_extension) : $id;
}
}
}
}
if ($this->debug > 1) error_log(__FILE__ . __METHOD__ ."($options[path],...,$id) calendar-multiget: ids=".implode(',',$ids).', cal_filters='.array2string($cal_filters));
}
return true;
}
/**
* Handle get request for an event
*
* @param array &$options
* @param int $id
* @param int $user =null account_id
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
function get(&$options,$id,$user=null)
{
if (!is_array($event = $this->_common_get_put_delete('GET',$options,$id)))
{
return $event;
}
$options['data'] = $this->iCal($event, $user, strpos($options['path'], '/inbox/') !== false ? 'REQUEST' : null);
$options['mimetype'] = 'text/calendar; charset=utf-8';
header('Content-Encoding: identity');
$schedule_tag = null;
header('ETag: "'.$this->get_etag($event, $schedule_tag).'"');
if ($this->use_schedule_tag)
{
header('Schedule-Tag: "'.$schedule_tag.'"');
}
return true;
}
/**
* Generate an iCal for the given event
*
* Taking into account virtual an real exceptions for recuring events
*
* @param array $event
* @param int $user =null account_id of calendar to display
* @param string $method =null eg. 'PUBLISH' for inbox, nothing anywhere else
* @param boolean|array $expand =false true or array with values for 'start', 'end' to expand recurrences
* @return string
*/
private function iCal(array $event,$user=null, $method=null, $expand=false)
{
static $handler = null;
if (is_null($handler)) $handler = $this->_get_handler();
if (!$user) $user = $GLOBALS['egw_info']['user']['account_id'];
// only return alarms in own calendar, not other users calendars
if ($user != $GLOBALS['egw_info']['user']['account_id'])
{
//error_log(__METHOD__.'('.array2string($event).", $user) clearing alarms");
$event['alarm'] = array();
}
else if ($event['##videoconference'])
{
// Add video conference link to description for user's own calendar
$avatar = new Api\Contacts\Photo("account:$user",
// disable sharing links currently, as sharing links from a different EGroupware user destroy the session
true);
// wrap in try and catch in case videoconference throws exceptions. e.g. BBB server exceptions
try {
$link = EGroupware\Status\Videoconference\Call::genMeetingUrl($event['##videoconference'], [
'name' => Api\Accounts::username($user),
'email' => Api\Accounts::id2name($user, 'account_email'),
'avatar' => (string)$avatar,
'account_id' => $user,
'cal_id' => $event['id'],
'notify_only' => true
], ['participants' =>array_filter($event['participants'], function($key){return is_numeric($key);}, ARRAY_FILTER_USE_KEY)], $event['start_date'], $event['end_date']);
}catch (Exception $e)
{
//error_log(__METHOD__.'()'.$e->getMessage());
// do nothing
}
$event['description'] = lang('Videoconference').":\n$link\n\n".$event['description'];
}
$events = array($event);
// for recuring events we have to add the exceptions
if ($this->client_shared_uid_exceptions && $event['recur_type'] && !empty($event['uid']))
{
if (is_array($expand))
{
if (isset($expand['start'])) $expand['start'] = $this->vCalendar->_parseDateTime($expand['start']);
if (isset($expand['end'])) $expand['end'] = $this->vCalendar->_parseDateTime($expand['end']);
}
// pass in original event as master, as it has correct start-date even if first recurrence is an exception
$events =& self::get_series($event['uid'], $this->bo, $expand, $user, $event);
// as alarm is now only on next recurrence, set alarm from original event on master
if ($event['alarm']) $events[0]['alarm'] = $event['alarm'];
}
elseif(!$this->client_shared_uid_exceptions && $event['reference'])
{
$events[0]['uid'] .= '-'.$event['id']; // force a different uid
}
return $handler->exportVCal($events, '2.0', $method);
}
/**
* Get array with events of a series identified by its UID (master and all exceptions)
*
* Maybe that should be part of calendar_bo
*
* @param string $uid UID
* @param calendar_bo $bo =null calendar_bo object to reuse for search call
* @param boolean|array $expand =false true or array with values for 'start', 'end' to expand recurrences
* @param int $user =null account_id of calendar to display, to remove master, if current user does not participate in
* @param array $master =null use provided event as master to fix wrong start-date if first recurrence is an exception
* @return array
*/
private static function &get_series($uid,calendar_bo $bo=null, $expand=false, $user=null, $master=null)
{
if (is_null($bo)) $bo = new calendar_bopdate();
$params = array(
'query' => array('cal_uid' => $uid),
'filter' => 'owner', // return all possible entries
'daywise' => false,
'date_format' => 'server',
'cfs' => array(), // read cfs as we use them to store X- attributes
);
if (is_array($expand)) $params += $expand;
if (!($events =& $bo->search($params)))
{
return array();
}
// find master, which is not always first event, eg. when first event is an exception
$exceptions = array();
foreach($events as $k => &$recurrence)
{
if ($recurrence['recur_type'])
{
if (!isset($master)) $master = $recurrence;
$exceptions =& $master['recur_exception'];
unset($events[$k]);
break;
}
}
// if recurring event starts in future behind horizont, nothing will be returned by bo::search()
if (!isset($master)) $master = $bo->read($uid);
foreach($events as $k => &$recurrence)
{
//error_log(__FILE__.'['.__LINE__.'] '.__METHOD__."($uid)[$k]:" . array2string($recurrence));
if ($master && $recurrence['reference'] && $recurrence['reference'] != $master['id'])
{
unset($events[$k]);
continue; // same uid, but references a different event or is own master
}
if (!$master || $recurrence['id'] != $master['id']) // real exception
{
// user is NOT participating in this exception
if ($user && !self::isParticipant($recurrence, $user))
{
// if he is NOT in master, delete this exception
if (!$master || !self::isParticipant($master, $user))
{
unset($events[$k]);
continue;
}
// otherwise mark him in this exception as rejected
$recurrence['participants'][$user] = 'R';
}
//error_log('real exception: '.array2string($recurrence));
// remove from masters recur_exception, as exception is include
// at least Lightning "understands" EXDATE as exception from what's included
// in the whole resource / VCALENDAR component
// not removing it causes Lightning to remove the exception itself
if (($e = array_search($recurrence['recurrence'],$exceptions)) !== false)
{
unset($exceptions[$e]);
}
continue; // nothing to change
}
// add alarms from master to recurrences, as clients otherwise have no alarms on virtual exceptions
if ($master && $master['alarm'])
{
$recurrence['alarm'] = $master['alarm'];
}
// now we need to check if this recurrence is an exception
if (!$expand && $master && $master['participants'] == $recurrence['participants'])
{
//error_log('NO exception: '.array2string($recurrence));
unset($events[$k]); // no exception --> remove it
continue;
}
// this is a virtual exception now (no extra event/cal_id in DB)
//error_log('virtual exception: '.array2string($recurrence));
$recurrence['recurrence'] = $recurrence['start'];
if ($master) $recurrence['reference'] = $master['id'];
$recurrence['recur_type'] = MCAL_RECUR_NONE; // is set, as this is a copy of the master
// not for included exceptions (Lightning): $master['recur_exception'][] = $recurrence['start'];
}
// only add master if we are not expanding and current user participates in master (and not just some exceptions)
// also need to add master, if we have no (other) $events eg. birthday noone every accepted/rejected
if (!$expand && $master && (!$user || self::isParticipant($master, $user) || !$events))
{
$events = array_merge(array($master), $events);
}
return $events;
}
/**
* Check if $user is a participant of given $event incl. group-invitations
*
* @param array $event
* @param int|string $user
* @return boolean
*/
public static function isParticipant(array $event, $user)
{
return isset($event['participants'][$user]) ||
// for users and group-invitations we need to check memberships of $user too
$user > 0 && array_intersect(array_keys($event['participants']),
(array)$GLOBALS['egw']->accounts->memberships($user, true));
}
/**
* Handle put request for an event
*
* @param array &$options
* @param int $id
* @param int $user =null account_id of owner, default null
* @param string $prefix =null user prefix from path (eg. /ralf from /ralf/addressbook)
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
function put(&$options,$id,$user=null,$prefix=null)
{
if ($this->debug) error_log(__METHOD__."($id, $user)".print_r($options,true));
if (!$prefix) $user = null; // /infolog/ does not imply setting the current user (for new entries it's done anyway)
// work around missing handling / racecondition in Lightning, if event already exists on server,
// but Lightning has not yet synced with the server: Lightning just retries the PUT, not GETing the event
// --> for now we ignore the If-None-Match: "*" as the lesser of two evils ;)
if (self::get_agent() === 'lightning' && isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
in_array($_SERVER['HTTP_IF_NONE_MATCH'], array('*', '"*"')))
{
unset($_SERVER['HTTP_IF_NONE_MATCH']);
$workaround_lightning_if_none_match = true;
}
// fix for iCal4OL using WinHTTP only supporting a certain header length
if (isset($_SERVER['HTTP_IF_SCHEDULE']) && !isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']))
{
$_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH'] = $_SERVER['HTTP_IF_SCHEDULE'];
}
$return_no_access = true; // as handled by importVCal anyway and allows it to set the status for participants
$oldEvent = $this->_common_get_put_delete('PUT',$options,$id,$return_no_access,
isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH'])); // dont fail with 412 Precondition Failed in that case
if (!is_null($oldEvent) && !is_array($oldEvent))
{
if ($this->debug) error_log(__METHOD__.': '.print_r($oldEvent,true).function_backtrace());
return $oldEvent;
}
if (is_null($oldEvent) && ($user >= 0 && !$this->bo->check_perms(Acl::ADD, 0, $user) ||
// if we require an extra invite grant, we fail if that does not exist (bind privilege is not given in that case)
$this->bo->require_acl_invite && $user && $user != $GLOBALS['egw_info']['user']['account_id'] &&
!$this->bo->check_acl_invite($user)))
{
// we have no add permission on this user's calendar
// ToDo: create event in current users calendar and invite only $user
if ($this->debug) error_log(__METHOD__."(,,$user) we have not enough rights on this calendar");
return '403 Forbidden';
}
$handler = $this->_get_handler();
$vCalendar = htmlspecialchars_decode($options['content']);
$charset = null;
if (!empty($options['content_type']))
{
$content_type = explode(';', $options['content_type']);
if (count($content_type) > 1)
{
array_shift($content_type);
foreach ($content_type as $attribute)
{
list($key, $value) = explode('=', $attribute);
switch (strtolower(trim($key)))
{
case 'charset':
$charset = strtoupper(trim($value));
}
}
}
}
if (is_array($oldEvent))
{
$eventId = $oldEvent['id'];
//client specified a CalDAV Scheduling schedule-tag AND an etag If-Match precondition
if ($this->use_schedule_tag && isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']) &&
isset($_SERVER['HTTP_IF_MATCH']))
{
if ($oldEvent['owner'] == $GLOBALS['egw_info']['user']['account_id'])
{
$this->caldav->log("Both If-Match and If-Schedule-Tag-Match header given: If-Schedule-Tag-Match ignored for event owner!");
unset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']);
}
else
{
$this->caldav->log("Both If-Match and If-Schedule-Tag-Match header given: If-Schedule-Tag-Match takes precedence for participants!");
}
}
// check CalDAV Scheduling schedule-tag precondition
if ($this->use_schedule_tag && isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']))
{
$schedule_tag_match = $_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH'];
if ($schedule_tag_match[0] == '"') $schedule_tag_match = substr($schedule_tag_match, 1, -1);
$schedule_tag = null;
$this->get_etag($oldEvent, $schedule_tag);
if ($schedule_tag_match !== $schedule_tag)
{
if ($this->debug) error_log(__METHOD__."(,,$user) schedule_tag missmatch: given '$schedule_tag_match' != '$schedule_tag'");
// honor Prefer: return=representation for 412 too (no need for client to explicitly reload)
$this->check_return_representation($options, $id, $user);
return '412 Precondition Failed';
}
}
// if no edit-rights (aka no organizer), update only attendee stuff: status and alarms
if (!$this->check_access(Acl::EDIT, $oldEvent) ||
// Work around problems with Outlook CalDAV Synchroniser (https://caldavsynchronizer.org/)
// - always sends all participants back with status NEEDS-ACTION --> resets status of all participant, if user has edit rights
// --> allow full updates only for organizer
self::get_agent() == 'caldavsynchronizer' && $oldEvent['owner'] != $user ||
// we ignored Lightings If-None-Match: "*" --> do not overwrite event, just change status
!empty($workaround_lightning_if_none_match))
{
$user_and_memberships = $GLOBALS['egw']->accounts->memberships($user, true);
$user_and_memberships[] = $user;
if (!array_intersect(array_keys($oldEvent['participants']), $user_and_memberships) &&
// above can be true, if current user is not in master but just a recurrence
(!$oldEvent['recur_type'] || !($series = self::get_series($oldEvent['uid'], $this->bo))))
{
if ($this->debug) error_log(__METHOD__."(,,$user) user $user is NOT an attendee!");
return '403 Forbidden';
}
// update only participant status and alarms of current user
if (($events = $handler->icaltoegw($vCalendar)))
{
$modified = 0;
$master = null;
foreach($events as $n => $event)
{
// for recurrances of event series, we need to read correct recurrence (or if series master is no first event)
if ($event['recurrence'] || $n && !$event['recurrence'] || isset($series))
{
// first try reading (virtual and real) exceptions
if (!isset($series))
{
$series = self::get_series($event['uid'], $this->bo);
//foreach($series as $s => $sEvent) error_log("series[$s]: ".array2string($sEvent));
}
foreach($series as $oldEvent)
{
if ($oldEvent['recurrence'] == $event['recurrence']) break;
}
// if no exception found, check if it might be just a recurrence (no exception)
if ($event['recurrence'] && $oldEvent['recurrence'] != $event['recurrence'])
{
if (!($oldEvent = $this->bo->read($eventId, $event['recurrence'], true)) ||
// virtual exceptions have recurrence=0 and recur_date=recurrence (series master or real exceptions have recurence=0)
!($oldEvent['recur_date'] == $event['recurrence'] || !$event['recurrence'] && !$oldEvent['recurrence']))
{
// if recurrence not found --> log it and continue with other recurrence
$this->caldav->log(__METHOD__."(,,$user) could NOT find recurrence=$event[recurrence]=".Api\DateTime::to($event['recurrence']).' of event series! event='.array2string($event));
continue;
}
}
}
if ($this->debug) error_log(__METHOD__."(, $id, $user, '$prefix') eventId=$eventId ($oldEvent[id]), user=$user, old-status='{$oldEvent['participants'][$user]}', new-status='{$event['participants'][$user]}', recurrence=$event[recurrence]=".Api\DateTime::to($event['recurrence']).", event=".array2string($event));
if (isset($event['participants']) && isset($event['participants'][$user]) &&
$event['participants'][$user] !== $oldEvent['participants'][$user])
{
if (!$this->bo->set_status($oldEvent['id'], $user, $event['participants'][$user],
// real (not virtual) exceptions use recurrence 0 in egw_cal_user.cal_recurrence!
$recurrence = $eventId == $oldEvent['id'] ? $event['recurrence'] : 0))
{
if ($this->debug) error_log(__METHOD__."(,,$user) failed to set_status($oldEvent[id], $user, '{$event['participants'][$user]}', $recurrence=".Api\DateTime::to($recurrence).')');
return '403 Forbidden';
}
else
{
++$modified;
if ($this->debug) error_log(__METHOD__."() set_status($oldEvent[id], $user, {$event['participants'][$user]} , $recurrence=".Api\DateTime::to($recurrence).')');
}
}
// import alarms, if given and changed
if ((array)$event['alarm'] !== (array)$oldEvent['alarm'])
{
$event['id'] = $oldEvent['id'];
if (isset($master) && $event['id'] == $master['id']) // only for pseudo exceptions
{
$modified += $handler->sync_alarms($event, (array)$oldEvent['alarm'], $user, $master);
}
else
{
$modified += $handler->sync_alarms($event, (array)$oldEvent['alarm'], $user);
}
}
if (!isset($master) && !$event['recurrence']) $master = $event;
}
if (!$modified) // NO modififictions, or none we understood --> log it and return Ok: "204 No Content"
{
$this->caldav->log(__METHOD__."(,,$user) NO changes for current user events=".array2string($events).', old-event='.array2string($oldEvent));
}
$this->put_response_headers($eventId, $options['path'], '204 No Content', self::$path_attr == 'caldav_name');
return '204 No Content';
}
if ($this->debug && !isset($events)) error_log(__METHOD__."(,,$user) only schedule-tag given for event without participants (only calendar owner) --> handle as regular PUT");
}
if ($return_no_access)
{
$retval = true;
}
else
{
$retval = '204 No Content';
// lightning will pop up the alarm, as long as the Sequence (etag) does NOT change
// --> update the etag alone, if user has no edit rights
if ($this->agent == 'lightning' && !$this->check_access(Acl::EDIT, $oldEvent) &&
isset($oldEvent['participants'][$GLOBALS['egw_info']['user']['account_id']]))
{
// just update etag in database
$GLOBALS['egw']->db->update($this->bo->so->cal_table,'cal_etag=cal_etag+1',array(
'cal_id' => $eventId,
),__LINE__,__FILE__,'calendar');
}
}
}
// schedule tag with deleted event should not create a new entry, therefore returning 404 Not Found
elseif (!isset($oldEvent) && isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']))
{
return '404 Not Found';
}
else
{
// new entry
$eventId = -1;
$retval = '201 Created';
}
if (!($cal_id = $handler->importVCal($vCalendar, $eventId,
self::etag2value($this->http_if_match), false, 0, $this->caldav->current_user_principal, $user, $charset, $id)))
{
if ($this->debug) error_log(__METHOD__."(,$id) eventId=$eventId: importVCal('$options[content]') returned ".array2string($cal_id));
if ($eventId && $cal_id === false)
{
// ignore import failures
$cal_id = $eventId;
$retval = true;
}
elseif ($cal_id === 0) // etag failure
{
// honor Prefer: return=representation for 412 too (no need for client to explicitly reload)
$this->check_return_representation($options, $id, $user);
return '412 Precondition Failed';
}
else
{
return '403 Forbidden';
}
}
// send evtl. necessary respose headers: Location, etag, ...
$this->put_response_headers($cal_id, $options['path'], $retval, self::$path_attr == 'caldav_name');
return $retval;
}
/**
* Handle post request for a schedule entry
*
* @param array &$options
* @param int $id
* @param int $user =null account_id of owner, default null
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
function post(&$options,$id,$user=null)
{
if ($this->debug) error_log(__METHOD__."($id, $user)".print_r($options,true));
$vCalendar = htmlspecialchars_decode($options['content']);
$charset = null;
if (!empty($options['content_type']))
{
$content_type = explode(';', $options['content_type']);
if (count($content_type) > 1)
{
array_shift($content_type);
foreach ($content_type as $attribute)
{
list($key, $value) = explode('=', $attribute);
switch (strtolower(trim($key)))
{
case 'charset':
$charset = strtoupper(trim($value));
}
}
}
}
if (substr($options['path'],-8) == '/outbox/')
{
if (preg_match('/^METHOD:REQUEST(\r\n|\r|\n)(.*)^BEGIN:VFREEBUSY/ism', $vCalendar))
{
if ($user != $GLOBALS['egw_info']['user']['account_id'])
{
error_log(__METHOD__."() freebusy request only allowed to own outbox!");
return '403 Forbidden';
}
// do freebusy request
return $this->outbox_freebusy_request($vCalendar, $charset, $user, $options);
}
else
{
// POST to deliver an invitation, containing http headers:
// Originator: mailto:<organizer-email>
// Recipient: mailto:<attendee-email>
// --> currently we simply ignore these posts, as EGroupware does it's own notifications based on user preferences
return '204 No Content';
}
}
if (preg_match('/^METHOD:(PUBLISH|REQUEST)(\r\n|\r|\n)(.*)^BEGIN:VEVENT/ism', $options['content']))
{
$handler = $this->_get_handler();
if (($foundEvents = $handler->iCalSearch($vCalendar, null, false, $charset)))
{
$id = array_shift($foundEvents);
list($eventId) = explode(':', $id);
if (!($cal_id = $handler->importVCal($vCalendar, $eventId, null,
false, 0, $this->caldav->current_user_principal, $user, $charset)))
{
if ($this->debug) error_log(__METHOD__."() importVCal($eventId) returned false");
}
header('ETag: "'.$this->get_etag($eventId).'"');
}
}
return true;
}
/**
* Handle outbox freebusy request
*
* @param string $ical
* @param string $charset of ical
* @param int $user account_id of owner
* @param array &$options
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
protected function outbox_freebusy_request($ical, $charset, $user, array &$options)
{
unset($options); // not used, but required by function signature
$vcal = new Horde_Icalendar();
if (!$vcal->parsevCalendar($ical, 'VCALENDAR', $charset))
{
return '400 Bad request';
}
$version = $vcal->getAttribute('VERSION');
//echo $ical."\n";
$handler = $this->_get_handler();
$handler->setSupportedFields('groupdav');
$handler->calendarOwner = $handler->user = 0; // to NOT default owner/organizer to something
if (!($component = $vcal->getComponent(0)) ||
!($event = $handler->vevent2egw($component, $version, $handler->supportedFields, $this->caldav->current_user_principal, 'Horde_Icalendar_Vfreebusy')))
{
return '400 Bad request';
}
if ($event['owner'] != $user)
{
$this->caldav->log(__METHOD__."('$ical',,$user) ORGANIZER is NOT principal!");
return '403 Forbidden';
}
//print_r($event);
$organizer = $component->getAttribute('ORGANIZER');
$attendees = (array)$component->getAttribute('ATTENDEE');
// X-CALENDARSERVER-MASK-UID specifies to exclude given event from busy-time
$mask_uid = $component->getAttributeDefault('X-CALENDARSERVER-MASK-UID', null);
header('Content-type: text/xml; charset=UTF-8');
$xml = new XMLWriter;
$xml->openMemory();
$xml->setIndent(true);
$xml->startDocument('1.0', 'UTF-8');
$xml->startElementNs('C', 'schedule-response', Api\CalDAV::CALDAV);
foreach(array_keys($event['participants'] ?? []) as $uid)
{
$xml->startElementNs('C', 'response', null);
$xml->startElementNs('C', 'recipient', null);
$xml->writeElementNs('D', 'href', 'DAV:', $attendee=array_shift($attendees));
$xml->endElement(); // recipient
$xml->writeElementNs('C', 'request-status', null, '2.0;Success');
$xml->writeElementNs('C', 'calendar-data', null,
$handler->freebusy($uid, $event['end'], true, 'utf-8', $event['start'], 'REPLY', array(
'UID' => $event['uid'],
'ORGANIZER' => $organizer,
'ATTENDEE' => $attendee,
)+(empty($mask_uid) || !is_string($mask_uid) ? array() : array(
'X-CALENDARSERVER-MASK-UID' => $mask_uid,
))));
$xml->endElement(); // response
}
$xml->endElement(); // schedule-response
$xml->endDocument();
echo $xml->outputMemory();
return true;
}
/**
* Handle free-busy-query report
*
* @param string $path
* @param array $options
* @param int $user account_id
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
function free_busy_report($path,$options,$user)
{
unset($path); // unused, but required by function signature
if (!$this->bo->check_perms(calendar_bo::ACL_FREEBUSY, 0, $user))
{
return '403 Forbidden';
}
foreach($options['other'] as $filter)
{
if ($filter['name'] == 'time-range')
{
$start = $this->vCalendar->_parseDateTime($filter['attrs']['start']);
$end = $this->vCalendar->_parseDateTime($filter['attrs']['end']);
}
}
$handler = $this->_get_handler();
header('Content-Type: text/calendar');
echo $handler->freebusy($user, $end, true, 'utf-8', $start, 'REPLY', array());
exit(); // otherwise we get a 207 multistatus, not 200 Ok
}
/**
* Return priviledges for current user, default is read and read-current-user-privilege-set
*
* Reimplemented to add read-free-busy and schedule-deliver privilege
*
* @param string $path path of collection
* @param int $user =null owner of the collection, default current user
* @return array with privileges
*/
public function current_user_privileges($path, $user=null)
{
$privileges = parent::current_user_privileges($path, $user);
//error_log(__METHOD__."('$path', $user) parent gave ".array2string($privileges));
if ($this->bo->check_perms(calendar_bo::ACL_FREEBUSY, 0, $user))
{
$privileges['read-free-busy'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV, 'read-free-busy', '');
if (substr($path, -8) == '/outbox/' && $this->bo->check_acl_invite($user))
{
$privileges['schedule-send'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV, 'schedule-send', '');
}
}
if (substr($path, -7) == '/inbox/' && $this->bo->check_acl_invite($user))
{
$privileges['schedule-deliver'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV, 'schedule-deliver', '');
}
// remove bind privilege on other users or groups calendars, if calendar Api\Config require_acl_invite is set
// and current user has no invite grant
if ($user && $user != $GLOBALS['egw_info']['user']['account_id'] && isset($privileges['bind']) &&
!$this->bo->check_acl_invite($user))
{
unset($privileges['bind']);
}
//error_log(__METHOD__."('$path', $user) returning ".array2string($privileges));
return $privileges;
}
/**
* Fix event series with exceptions, called by calendar_ical::importVCal():
* a) only series master = first event got cal_id from URL
* b) exceptions need to be checked if they are already in DB or new
* c) recurrence-id of (real not virtual) exceptions need to be re-added to master
*
* @param array &$events
*/
static function fix_series(array &$events)
{
$bo = new calendar_boupdate();
// get array with orginal recurrences indexed by recurrence-id
$org_recurrences = $exceptions = array();
foreach(self::get_series($events[0]['uid'],$bo) as $k => $event)
{
if (!$k) $master = $event;
if ($event['recurrence'])
{
$org_recurrences[$event['recurrence']] = $event;
}
}
// assign cal_id's to already existing recurrences and evtl. re-add recur_exception to master
foreach($events as $k => &$recurrence)
{
if (!$recurrence['recurrence'])
{
// master
$recurrence['id'] = $master['id'];
$master =& $events[$k];
continue;
}
// from now on we deal with exceptions
$org_recurrence = isset($recurrence['recurrence']) ? $org_recurrences[$recurrence['recurrence']] : null;
if (isset($org_recurrence)) // already existing recurrence
{
//error_log(__METHOD__.'() setting id #'.$org_recurrence['id']).' for '.$recurrence['recurrence'].' = '.date('Y-m-d H:i:s',$recurrence['recurrence']);
$recurrence['id'] = $org_recurrence['id'];
// re-add (non-virtual) exceptions to master's recur_exception
if ($recurrence['id'] != $master['id'])
{
//error_log(__METHOD__.'() re-adding recur_exception '.$recurrence['recurrence'].' = '.date('Y-m-d H:i:s',$recurrence['recurrence']));
$exceptions[] = $recurrence['recurrence'];
}
// remove recurrence to be able to detect deleted exceptions
unset($org_recurrences[$recurrence['recurrence']]);
}
}
$master['recur_exception'] = array_merge($exceptions, $master['recur_exception']);
// delete not longer existing recurrences
foreach($org_recurrences as $org_recurrence)
{
if ($org_recurrence['id'] != $master['id']) // non-virtual recurrence
{
//error_log(__METHOD__.'() deleting #'.$org_recurrence['id']);
$bo->delete($org_recurrence['id']); // might fail because of permissions
}
else // virtual recurrence
{
//error_log(__METHOD__.'() delete virtual exception '.$org_recurrence['recurrence'].' = '.date('Y-m-d H:i:s',$org_recurrence['recurrence']));
$bo->update_status($master, $org_recurrence, $org_recurrence['recurrence']);
}
}
//foreach($events as $n => $event) error_log(__METHOD__." $n after: ".array2string($event));
}
/**
* Handle delete request for an event
*
* If current user has no right to delete the event, but is an attendee, we reject the event for him.
*
* @todo remove (non-virtual) exceptions, if series master gets deleted
* @param array &$options
* @param int $id
* @param int $user account_id of collection owner
* @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
*/
function delete(&$options,$id,$user)
{
if (strpos($options['path'], '/inbox/') !== false)
{
return true; // simply ignore DELETE in inbox for now
}
$return_no_access = true; // to allow to check if current use is a participant and reject the event for him
$event = $this->_common_get_put_delete('DELETE',$options,$id,$return_no_access);
// no event found --> 404 Not Found
if (!is_array($event))
{
$ret = $event;
error_log("_common_get_put_delete('DELETE', ..., $id) user=$user, return_no_access=".array2string($return_no_access)." returned ".array2string($event));
}
// Work around problems with Outlook CalDAV Synchronizer (https://caldavsynchronizer.org/)
// - sends a DELETE to reject a meeting request --> deletes event for all participants, if user has delete rights from the organizer
// --> only set status for everyone else but the organizer
// OR no delete rights and deleting an event in someone else calendar --> check if calendar owner is a participant --> reject him
elseif ((!$return_no_access || (self::get_agent() === 'caldavsynchronizer' && $event['owner'] != $user)) &&
// check if current user has edit rights for calendar of $user, can change status / reject invitation for him
$this->bo->check_perms(Acl::EDIT, 0, $user))
{
// check if user is a participant or one of the groups he is a member of --> reject the meeting request
$ret = '403 Forbidden';
$memberships = $GLOBALS['egw']->accounts->memberships($user, true);
foreach(array_keys($event['participants']) as $uid)
{
if ($user == $uid || in_array($uid, $memberships))
{
$this->bo->set_status($event, $user, 'R');
$ret = true;
break;
}
}
}
// current user has no delete rights for event --> reject invitation, if he is a participant
elseif (!$return_no_access)
{
// check if current user is a participant or one of the groups he is a member of --> reject the meeting request
$ret = '403 Forbidden';
$memberships = $GLOBALS['egw']->accounts->memberships($this->bo->user, true);
foreach(array_keys($event['participants']) as $uid)
{
if ($this->bo->user == $uid || in_array($uid, $memberships))
{
$this->bo->set_status($event, $this->bo->user, 'R');
$ret = true;
break;
}
}
}
// we have delete rights on the event and (try to) delete it
else
{
$ret = $this->bo->delete($event['id']);
if (!$ret) { error_log("delete($event[id]) returned FALSE"); $ret = '400 Failed to delete event';}
}
if ($this->debug) error_log(__METHOD__."(,$id) return_no_access=$return_no_access, event[participants]=".array2string(is_array($event)?$event['participants']:null).", user={$this->bo->user} --> return ".array2string($ret));
return $ret;
}
/**
* Read an entry
*
* We have to make sure to not return or even consider in read deleted events, as the might have
* the same UID and/or caldav_name as not deleted events and would block access to valid entries
*
* @param string|id $id
* @return array|boolean array with entry, false if no read rights, null if $id does not exist
*/
function read($id)
{
if (strpos($column=self::$path_attr,'_') === false) $column = 'cal_'.$column;
$event = $this->bo->read(array($column => $id, 'cal_deleted IS NULL', 'cal_reference=0'), null, true, 'server');
if ($event) $event = array_shift($event); // read with array as 1. param, returns an array of events!
if (!($retval = $this->bo->check_perms(calendar_bo::ACL_FREEBUSY,$event, 0, 'server')) &&
// above can be true, if current user is not in master but just a recurrence
(!$event['recur_type'] || !($events = self::get_series($event['uid'], $this->bo))))
{
if ($this->debug > 0) error_log(__METHOD__."($id) no READ or FREEBUSY rights returning ".array2string($retval));
return $retval;
}
if (!$this->bo->check_perms(Acl::READ, $event, 0, 'server'))
{
$this->bo->clear_private_infos($event, array($this->bo->user, $event['owner']));
}
// handle deleted events, as not existing
if ($event['deleted']) $event = null;
if ($this->debug > 1) error_log(__METHOD__."($id) returning ".array2string($event));
return $event;
}
/**
* Update etag, ctag and sync-token to reflect changed attachments
*
* @param array|string|int $entry array with entry data from read, or id
*/
public function update_tags($entry)
{
if (!is_array($entry)) $entry = $this->read($entry);
$this->bo->update($entry, true);
}
/**
* Query ctag for calendar
*
* @return string
*/
public function getctag($path,$user)
{
$ctag = $this->bo->get_ctag($user,$path == '/calendar/' ? 'owner' : 'default'); // default = not rejected
if ($this->debug > 1) error_log(__FILE__.'['.__LINE__.'] '.__METHOD__. "($path)[$user] = $ctag");
return $ctag;
}
/**
* Get the etag for an entry
*
* @param array|int $entry array with event or cal_id
* @param string $schedule_tag =null on return schedule-tag
* @return string|boolean string with etag or false
*/
function get_etag($entry, &$schedule_tag=null)
{
$etag = $this->bo->get_etag($entry, $schedule_tag, $this->client_shared_uid_exceptions);
//error_log(__METHOD__ . "($entry[id] ($entry[etag]): $entry[title] --> etag=$etag");
return $etag;
}
/**
* Send response-headers for a PUT (or POST with add-member query parameter)
*
* Reimplemented to send
*
* @param int|array $entry id or array of new created entry
* @param string $path
* @param int|string $retval
* @param boolean $path_attr_is_name =true true: path_attr is ca(l|rd)dav_name, false: id (GroupDAV needs Location header)
* @param string $etag =null etag, to not calculate it again (if != null)
* @param string $prefix =''
*/
function put_response_headers($entry, $path, $retval, $path_attr_is_name=true, $etag=null, $prefix='')
{
$schedule_tag = null;
if (!isset($etag)) $etag = $this->get_etag($entry, $schedule_tag);
if ($this->use_schedule_tag)
{
header('Schedule-Tag: "'.$schedule_tag.'"');
}
parent::put_response_headers($entry, $path, $retval, $path_attr_is_name, $etag, $prefix);
}
/**
* Check if user has the neccessary rights on an event
*
* @param int $acl Acl::READ, Acl::EDIT or Acl::DELETE
* @param array|int $event event-array or id
* @return boolean null if entry does not exist, false if no access, true if access permitted
*/
function check_access($acl,$event)
{
if ($acl == Acl::READ)
{
// we need at least calendar_bo::ACL_FREEBUSY to get some information
$acl = calendar_bo::ACL_FREEBUSY;
}
return $this->bo->check_perms($acl,$event,0,'server');
}
/**
* Add extra properties for calendar collections
*
* @param array $props regular props by the Api\CalDAV handler
* @param string $displayname
* @param string $base_uri =null base url of handler
* @param int $user =null account_id of owner of current collection
* @param string $path =null path of the collection
* @return array
*/
public function extra_properties(array $props, $displayname, $base_uri=null, $user=null, $path=null)
{
unset($base_uri); // unused, but required by function signature
if (!isset($props['calendar-description']))
{
// default calendar description: can be overwritten via PROPPATCH, in which case it's already set
$props['calendar-description'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-description',$displayname);
}
$supported_components = array(
Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'comp',array('name' => 'VEVENT')),
);
// outbox supports VFREEBUSY too, it is required from OS X iCal to autocomplete locations
if (substr($path,-8) == '/outbox/')
{
$supported_components[] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'comp',array('name' => 'VFREEBUSY'));
}
$props['supported-calendar-component-set'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV,
'supported-calendar-component-set',$supported_components);
// supported reports
$props['supported-report-set'] = array(
'calendar-query' => Api\CalDAV::mkprop('supported-report',array(
Api\CalDAV::mkprop('report',array(
Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-query',''))))),
'calendar-multiget' => Api\CalDAV::mkprop('supported-report',array(
Api\CalDAV::mkprop('report',array(
Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-multiget',''))))),
'free-busy-query' => Api\CalDAV::mkprop('supported-report',array(
Api\CalDAV::mkprop('report',array(
Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'free-busy-query',''))))),
);
// rfc 6578 sync-collection report for everything but outbox
// only if "delete-prevention" is switched on (deleted entries get marked deleted but not actualy deleted
if (strpos($path, '/outbox/') === false)
{
$props['supported-report-set']['sync-collection'] = Api\CalDAV::mkprop('supported-report',array(
Api\CalDAV::mkprop('report',array(
Api\CalDAV::mkprop('sync-collection','')))));
}
$props['supported-calendar-data'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'supported-calendar-data',array(
Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-data', array('content-type' => 'text/calendar', 'version'=> '2.0')),
Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-data', array('content-type' => 'text/x-calendar', 'version'=> '1.0'))));
// get timezone of calendar
if ($this->caldav->prop_requested('calendar-timezone'))
{
$props['calendar-timezone'] = Api\CalDAV::mkprop(Api\CalDAV::CALDAV,'calendar-timezone',
calendar_timezones::user_timezone($user));
}
return $props;
}
/**
* Get the handler and set the supported fields
*
* @return calendar_ical
*/
private function _get_handler()
{
$handler = new calendar_ical();
$handler->setSupportedFields('GroupDAV',$this->agent);
$handler->supportedFields['attachments'] = true; // enabling attachments
if ($this->debug > 1) error_log("ical Handler called: " . $this->agent);
return $handler;
}
/**
* Return calendars/addressbooks shared from other users with the current one
*
* return array account_id => account_lid pairs
*/
function get_shared()
{
$shared = array();
$pref = $GLOBALS['egw_info']['user']['preferences']['groupdav']['calendar-home-set'];
$calendar_home_set = $pref ? explode(',', $pref) : array();
// replace symbolic id's with real nummeric id's
foreach(array(
'G' => $GLOBALS['egw_info']['user']['account_primary_group'],
) as $sym => $id)
{
if (($key = array_search($sym, $calendar_home_set)) !== false)
{
$calendar_home_set[$key] = $id;
}
}
foreach(ExecMethod('calendar.calendar_bo.list_cals') as $entry)
{
$id = $entry['grantor'];
if ($id && $GLOBALS['egw_info']['user']['account_id'] != $id && // no current user
(in_array('A',$calendar_home_set) || in_array((string)$id,$calendar_home_set)) &&
is_numeric($id) && ($owner = $this->accounts->id2name($id)))
{
$shared[$id] = 'calendar-'.$owner;
}
}
// shared locations and resources
if ($GLOBALS['egw_info']['user']['apps']['resources'])
{
foreach(array('locations','resources') as $res)
{
if (($pref = $GLOBALS['egw_info']['user']['preferences']['groupdav']['calendar-home-set-'.$res]))
{
foreach(explode(',', $pref) as $res_id)
{
$is_location = $res == 'locations';
$shared['r'.$res_id] = str_replace('s/', '-', Api\CalDAV\Principals::resource2name($res_id, $is_location));
}
}
}
}
return $shared;
}
/**
* Return appliction specific settings
*
* @param array $hook_data
* @return array of array with settings
*/
static function get_settings($hook_data)
{
$calendars = array(
'A' => lang('All'),
'G' => lang('Primary Group'),
);
if (!isset($hook_data['setup']) && in_array($hook_data['type'], array('user', 'group')))
{
$user = $hook_data['account_id'];
foreach (calendar_bo::list_calendars($user) as $entry)
{
$calendars[$entry['grantor']] = $entry['name'];
}
if ($user > 0) unset($calendars[$user]); // skip current user
}
$settings = array();
$settings['calendar-home-set'] = array(
'type' => 'multiselect',
'label' => 'Calendars to sync in addition to personal calendar',
'name' => 'calendar-home-set',
'help' => lang('Only supported by a few fully conformant clients (eg. from Apple). If you have to enter a URL, it will most likly not be suppored!').'<br/>'.lang('They will be sub-folders in users home (%1 attribute).','CalDAV "calendar-home-set"'),
'values' => $calendars,
'xmlrpc' => True,
'admin' => False,
);
$settings['calendar-past-limit'] = array(
'type' => 'integer',
'label' => lang('How many days to sync in the past (default %1)', self::PAST_LIMIT),
'name' => 'calendar-past-limit',
'help' => 'Clients not explicitly stating a limit get limited to these many days. A too high limit may cause problems with some clients.',
'xmlrpc' => True,
'admin' => False,
);
$settings['calendar-future-limit'] = array(
'type' => 'integer',
'label' => lang('How many days to sync in the future (default %1)', self::FUTURE_LIMIT),
'name' => 'calendar-future-limit',
'help' => 'Clients not explicitly stating a limit get limited to these many days. A too high limit may cause problems with some clients.',
'xmlrpc' => True,
'admin' => False,
);
// allow to subscribe to resources
if ($GLOBALS['egw_info']['user']['apps']['resources'] && ($all_resources = Api\CalDAV\Principals::get_resources()))
{
$resources = $locations = array();
foreach($all_resources as $resource)
{
if (Api\CalDAV\Principals::resource_is_location($resource))
{
$locations[$resource['res_id']] = $resource['name'];
}
else
{
$resources[$resource['res_id']] = $resource['name'];
}
}
foreach(array(
'locations' => $locations,
'resources' => $resources,
) as $name => $options)
{
if ($options)
{
natcasesort($options);
$settings['calendar-home-set-'.$name] = array(
'type' => 'multiselect',
'label' => lang('%1 to sync', lang($name == 'locations' ? 'Location calendars' : 'Resource calendars')),
'no_lang'=> true,
'name' => 'calendar-home-set-'.$name,
'help' => lang('Only supported by a few fully conformant clients (eg. from Apple). If you have to enter a URL, it will most likly not be suppored!').'<br/>'.lang('They will be sub-folders in users home (%1 attribute).','CalDAV "calendar-home-set"'),
'values' => $options,
'xmlrpc' => True,
'admin' => False,
);
}
}
}
return $settings;
}
}
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