DAViCal
freebusy-functions.php
1<?php
2
9include_once('vCalendar.php');
10include_once('RRule.php');
11
12
13function get_freebusy( $path_match, $range_start, $range_end, $bin_privs = null ) {
14 global $request, $c;
15 dbg_error_log( 'freebusy', ' Getting freebusy for path %s from %s to %s', $path_match, $range_start, $range_end);
16
17 if ( !isset($bin_privs) ) $bin_privs = $request->Privileges();
18 if ( !isset($range_start) || !isset($range_end) ) {
19 $request->DoResponse( 400, 'All valid freebusy requests MUST contain a time-range filter' );
20 }
21 $params = array( ':path_match' => $path_match, ':start' => $range_start->UTC(), ':end' => $range_end->UTC() );
22 $where = ' WHERE caldav_data.dav_name ~ :path_match ';
23 $where .= "AND (";
24 $where .= " (calendar_item.first_instance_start <= :end AND (:start <= calendar_item.last_instance_end OR calendar_item.last_instance_end IS NULL)) ";
25 $where .= " OR (calendar_item.first_instance_start IS NULL AND rrule_event_overlaps( dtstart, dtend, rrule, :start, :end)) ";
26 $where .= ") ";
27 $where .= "AND caldav_data.caldav_type IN ( 'VEVENT', 'VFREEBUSY' ) ";
28 $where .= "AND (calendar_item.transp != 'TRANSPARENT' OR calendar_item.transp IS NULL) ";
29 $where .= "AND (calendar_item.status != 'CANCELLED' OR calendar_item.status IS NULL) ";
30 $where .= "AND collection.is_calendar AND collection.schedule_transp = 'opaque' ";
31
32 if ( $bin_privs != privilege_to_bits('all') ) {
33 $where .= "AND (calendar_item.class != 'PRIVATE' OR calendar_item.class IS NULL) ";
34 }
35
36 $fbtimes = array();
37 $sql = 'SELECT caldav_data.caldav_data, calendar_item.rrule, calendar_item.transp, calendar_item.status, ';
38 $sql .= "to_char(calendar_item.dtstart at time zone 'GMT',".AWLDatabase::SqlUTCFormat.') AS start, ';
39 $sql .= "to_char(calendar_item.dtend at time zone 'GMT',".AWLDatabase::SqlUTCFormat.') AS finish, ';
40 $sql .= "calendar_item.class, calendar_item.dav_id, ";
41 $sql .= "collection.timezone AS collection_tzid ";
42 $sql .= 'FROM caldav_data INNER JOIN calendar_item USING(dav_id,user_no,dav_name,collection_id) ';
43 $sql .= 'INNER JOIN collection USING(collection_id)';
44 $sql .= $where;
45 if ( isset($c->strict_result_ordering) && $c->strict_result_ordering ) $sql .= ' ORDER BY dav_id';
46 $qry = new AwlQuery( $sql, $params );
47 if ( $qry->Exec("REPORT",__LINE__,__FILE__) && $qry->rows() > 0 ) {
48 while( $calendar_object = $qry->Fetch() ) {
49 $extra = '';
50 if ( $calendar_object->status == 'TENTATIVE' ) {
51 $extra = ';BUSY-TENTATIVE';
52 }
53 else if ( isset($c->_workaround_client_freebusy_bug) && $c->_workaround_client_freebusy_bug ) {
54 $extra = ';BUSY';
55 }
56 //$extra = ';'.$calendar_object->dav_id;
57 $ics = new vComponent($calendar_object->caldav_data);
58 $expanded = expand_event_instances($ics, $range_start, $range_end);
59 $expansion = $expanded->GetComponents( array('VEVENT'=>true,'VTODO'=>true,'VJOURNAL'=>true) );
60 $collection_tzid = $calendar_object->collection_tzid;
61 dbg_error_log( "freebusy", "=================== $calendar_object->dav_id ======================== %s -> %s, %s %s", $calendar_object->start, $calendar_object->finish, $calendar_object->class, $extra );
62 $dtstart_type = 'DTSTART';
63 foreach( $expansion AS $k => $v ) {
64 dbg_error_log( "freebusy", " %s: %s", $k, $v->Render() );
65 $start_date = $v->GetProperty($dtstart_type);
66 if ( !isset($start_date) && $v->GetType() != 'VTODO' ) {
67 $dtstart_type = 'DUE';
68 $start_date = $v->GetProperty($dtstart_type);
69 }
70
71 // Floating dtstarts (either VALUE=DATE or with no TZID) can default to the collection's tzid, if one is set
72 $start_date = RepeatRuleDateTime::withFallbackTzid( $start_date, $collection_tzid );
73
74 $duration = $v->GetProperty('DURATION');
75 $duration = ( !isset($duration) ? 'P1D' : $duration->Value());
76 $end_date = clone($start_date);
77 $end_date->modify( $duration );
78 if ( $end_date == $start_date || $end_date < $range_start || $start_date > $range_end ) {
79 dbg_error_log( "freebusy", "-----------------------------------------------------" );
80 continue;
81 }
82 $thisfb = $start_date->UTC() .'/'. $end_date->UTC() . $extra;
83 array_push( $fbtimes, $thisfb );
84 }
85 }
86 }
87
88 $freebusy = new vComponent();
89 $freebusy->setType('VFREEBUSY');
90 $freebusy->AddProperty('DTSTAMP', date('Ymd\THis\Z'));
91 $freebusy->AddProperty('DTSTART', $range_start->UTC());
92 $freebusy->AddProperty('DTEND', $range_end->UTC());
93
94 sort( $fbtimes );
95 foreach( $fbtimes AS $k => $v ) {
96 $text = explode(';',$v,2);
97 $freebusy->AddProperty( 'FREEBUSY', $text[0], (isset($text[1]) ? array('FBTYPE' => $text[1]) : null) );
98 }
99
100 return $freebusy;
101}
102