inc/freebusy-functions.php

   1 <?php
   2
   3 /**
   4  * Function to include which handles building a free/busy response to
   5  * be used in either the REPORT, response to a POST, or response to a
   6  * a freebusy GET request.
   7  */
   8
   9 include_once('iCalendar.php');
  10 include_once('RRule-v2.php');
  11
  12
  13 function get_freebusy( $path_match, $range_start, $range_end, $bin_privs = null ) {
  14   global $request, $c;
  15
  16 //  printf( "Path: %s\n", $path_match);
  17 //  print_r($range_start);
  18 //  print_r($range_end);
  19
  20   if ( !isset($bin_privs) ) $bin_privs = $request->Privileges();
  21   if ( !isset($range_start) || !isset($range_end) ) {
  22     $request->DoResponse( 400, 'All valid freebusy requests MUST contain a time-range filter' );
  23   }
  24   $params = array( ':path_match' => $path_match, ':start' => $range_start->UTC(), ':end' => $range_end->UTC() );
  25   $where = ' WHERE caldav_data.dav_name ~ :path_match ';
  26   $where .= 'AND rrule_event_overlaps( dtstart, dtend, rrule, :start, :end) ';
  27   $where .= "AND caldav_data.caldav_type IN ( 'VEVENT', 'VTODO' ) ";
  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 // $debugging = true;
  37   $fbtimes = array();
  38   $sql = 'SELECT caldav_data.caldav_data, calendar_item.rrule, calendar_item.transp, calendar_item.status, ';
  39   $sql .= "to_char(calendar_item.dtstart at time zone 'GMT',".iCalendar::SqlUTCFormat().') AS start, ';
  40   $sql .= "to_char(calendar_item.dtend at time zone 'GMT',".iCalendar::SqlUTCFormat().') AS finish, ';
  41   $sql .= "calendar_item.class, calendar_item.dav_id ";
  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 //      else if ( $debugging ) {
  57 //        $extra = ';'.$calendar_object->dav_id;
  58 //      }
  59       dbg_error_log( "REPORT", " FreeBusy: Not transparent, tentative or cancelled: %s, %s, %s", $calendar_object->start, $calendar_object->finish, $calendar_object->class );
  60       $ics = new vComponent($calendar_object->caldav_data);
  61       $expanded = expand_event_instances($ics, $range_start, $range_end);
  62       $expansion = $expanded->GetComponents( array('VEVENT'=>true,'VTODO'=>true,'VJOURNAL'=>true) );
  63       foreach( $expansion AS $k => $v ) {
  64 //        echo "=====================================================\n";
  65 //        printf( "Type: %s\n", $v->GetType());
  66 //        print_r($v);
  67 //        echo "-----------------------------------------------------\n";
  68         $start_date = $v->GetProperty('DTSTART');
  69         if ( !isset($start_date) ) continue;
  70         $start_date = new RepeatRuleDateTime($start_date);
  71         $duration = $v->GetProperty('DURATION');
  72         $duration = ( !isset($duration) ? 'P1D' : $duration->Value());
  73         $end_date = clone($start_date);
  74         $end_date->modify( $duration );
  75         if ( $end_date == $start_date || $end_date < $range_start || $start_date > $range_end ) continue;
  76         $thisfb = $start_date->UTC() .'/'. $end_date->UTC() . $extra;
  77         array_push( $fbtimes, $thisfb );
  78       }
  79     }
  80   }
  81
  82   $freebusy = new iCalComponent();
  83   $freebusy->SetType('VFREEBUSY');
  84   $freebusy->AddProperty('DTSTAMP', date('Ymd\THis\Z'));
  85   $freebusy->AddProperty('DTSTART', $range_start->UTC());
  86   $freebusy->AddProperty('DTEND', $range_end->UTC());
  87
  88   sort( $fbtimes );
  89   foreach( $fbtimes AS $k => $v ) {
  90     $text = explode(';',$v,2);
  91     $freebusy->AddProperty( 'FREEBUSY', $text[0], (isset($text[1]) ? array('FBTYPE' => $text[1]) : null) );
  92   }
  93
  94   return $freebusy;
  95 }
  96