i_calendar_manager.inc

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<?php
class iCalendarData extends DataItem
{
     var $fields = array(
          "begin_calendar"         =>   String,
          "prodid"                 =>   String,
          "version"                =>   String,
          "method"                 =>   String,
          "begin_timezone"         =>   String,
          "tzid"                        =>   String,
          "begin_standard"         =>   String,
          "standard_start"         =>   String,
          "standard_offset"        =>   String,
          "standard_dst_offset"    =>   String,
          "standard_rrule"         =>   String,
          "standard_name"               =>   String,
          "end_standard"           =>   String,
          "begin_daylight"         =>   String,
          "daylight_start"         =>   String,
          "daylight_offset"        =>   String,
          "daylight_dst_offset"    =>   String,
          "daylight_rrule"         =>   String,
          "daylight_name"               =>   String,
          "end_daylight"           =>   String,
          "end_timezone"           =>   String,
          "begin_event"            =>   String,
          "organizer"                   =>   String,
          "attendee"                    =>   String,
          "dtstart"                =>   String,
          "dtend"                       =>   String,
          "location"                    =>   String,
          "transp"                 =>   String,
          "event_status"           =>   String,
          "display_status"         =>   String,
          "uid"                         =>   String,
          "sequence"                    =>   Number,
          "dtstamp"                =>   String,
          "last_modified"               =>   String,
          "description"            =>   HTML,
          "summary"                =>   String,
          "priority"                    =>   Number,
          "class"                       =>   String,
          "end_event"                   =>   String,
          "end_calendar"           =>   String,
               );
     
     var $fieldAliases = array(
               "begin_calendar"         =>   "BEGIN",
               "begin_event"            =>   "BEGIN",
               "event_status"           =>   "STATUS",
               "display_status"         => "X-MICROSOFT-CDO-INTENDEDSTATUS",
               "last_modified"          => "LAST-MODIFIED",
               "end_event"                   =>   "END",
               "end_calendar"           =>   "END",
               
               "begin_timezone"         =>   "BEGIN",
               
               "begin_standard"         =>   "BEGIN",
               "standard_start"         =>   "DTSTART",
               "standard_offset"        =>   "TZOFFSETFROM",
               "standard_dst_offset"    =>   "TZOFFSETTO",
               "standard_rrule"         =>   "RRULE",
               "standard_name"               =>   "TZNAME",
               "end_standard"           =>   "END",
               
               "begin_daylight"         =>   "BEGIN",
               "daylight_start"         =>   "DTSTART",
               "daylight_offset"        =>   "TZOFFSETFROM",
               "daylight_dst_offset"    =>   "TZOFFSETTO",
               "daylight_rrule"         =>   "RRULE",
               "daylight_name"               =>   "TZNAME",
               "end_daylight"           =>   "END",
                    
               "end_timezone"           =>   "END",
          );
 
     function __construct()
     {
          $this->primary_key = "icalendar_uid";
          $this->table = "icalendar";
          
          $this->DataItem(func_get_args());
     }
}
 
 
class iCalendarEventManager
{
     var $replyTo;                      
     var $replyToName;                  
     var $mailTo;                       
     var $attendeeName;                 
     var $rsvp = true;                  
     var $attendeeStatus;               
     var $required = false;             
     var $invitees = array();           
     var $data;                              
     var $aliases = array();            
     
     function __construct($id, $start, $end, $title, $description = "", $location = "", $sequence_id = 0, $timeZone = null)
     {
          global $config;
                    
          $this->data = new iCalendarData();
          $this->data->set("summary", $title);
          $this->data->set("description", $description);
          $this->data->set("location", $location);
 
          // The uid must be globally unique thus is includes the http_host
          // and the event id.
          $uid = $id . $config["http_host"];
          $this->data->set("uid", $uid);
          
          $this->data->set("sequence", $sequence_id);
          
          $this->data->set("dtstart", $start);
          $this->data->set("dtend", $end);
          
          $today = new DateTime(now()); 
          $this->data->set("dtstamp", $today->format('Ymd\THis'));
          
          $this->data->filter = new ExclusionFilter("last_modified", "standard_rrule", "daylight_rrule");     
          // is last modified needed?
          //$this->data->last_modified = $today;
               
          $this->data->set("priority", 5);
          $this->data->set("class", "PUBLIC");
          
          $this->data->set("begin_calendar", "VCALENDAR");
          $this->data->set("prodid", "-//Microsoft Corporation//Outlook 11.0 MIMEDIR//EN");
          $this->data->set("version", "2.0");
          $this->data->set("begin_event", "VEVENT");
          $this->data->set("transp", "OPAQUE");
          $this->data->set("display_status", "BUSY");
          $this->data->set("end_event", "VEVENT");
          $this->data->set("end_calendar", "VCALENDAR");
          $this->data->set("method", "REQUEST");
          $this->data->set("event_status",  "CONFIRMED");
                    
          $this->setEventDates($start, $end, $timeZone);
 
          $this->setAliases();
     }
     
     function setAliases()
     {
          $aliases = $this->data->getFieldAliases();
          // Read in default alias definitions from DataItem
          if ($aliases)
          {
               foreach($aliases as $field => $alias)
               {
                    $this->aliases[$field] = $alias;
               }
          }    
     }
     
     function setEventDates($start, $end, $timeZone)
     {
          $startObj = new DateTime($start);
          $endObj = new DateTime($end);
          
          if($this->isAllDay($start) && $this->isAllDay($end))
          {
               $start_value = ";VALUE=DATE:" . $startObj->format("Ymd");
               $end_value = ";VALUE=DATE:" . $endObj->format("Ymd");
          }
          else
          {
               $start_value = $startObj->format('Ymd\THis');
               $end_value = $endObj->format('Ymd\THis');
          }
          
          if($timeZone)
          {
               $this->setTimeZone($timeZone, $start_value);
               $this->data->set("dtstart", ";TZID=" . $timeZone->time_zone_name . ":". $start_value);
               $this->data->set("dtend", ";TZID=" . $timeZone->time_zone_name . ":". $end_value);
          }
          else
          {
               $this->excludeTimeZoneFields();
               $this->data->set("dtstart", $start_value);
               $this->data->set("dtend", $end_value);
          }
     }
     
     function setTimeZone($timeZone, $start_value)
     {
          $this->data->set("begin_timezone", "VTIMEZONE");
          $this->data->set("begin_standard", "STANDARD");
          $this->data->set("end_standard", "STANDARD");
          $this->data->set("begin_daylight", "DAYLIGHT");
          $this->data->set("end_daylight", "DAYLIGHT");
          $this->data->set("end_timezone", "VTIMEZONE");
          
          $this->data->set("tzid", $timeZone->get("time_zone_name"));
          
          $standard_offset = $this->formatTimeZoneHours($timeZone->standard_offset);
          $daylight_offset = $this->formatTimeZoneHours($timeZone->daylight_offset);
          
          $this->data->set("standard_name", "EST");
          $this->data->set("daylight_name", "EDT");
          $this->data->set("standard_offset", $standard_offset);
          $this->data->set("standard_dst_offset", $daylight_offset);
          $this->data->set("daylight_offset", $daylight_offset);
          $this->data->set("daylight_dst_offset", $standard_offset);  
          
          $this->data->set("standard_start", $start_value);
          $this->data->set("daylight_start", $start_value);
     }
     
     function formatTimeZoneHours($offset)
     {
          $neg = false;
          if($offset < 0)
          {
               $neg = true;
               $offset = abs($offset);
          }
 
          $hour = $offset;
          $min = "00";
          if(!is_int($offset))
          {
               $hour = floor($offset);
               $min = "30";
          }
          
          $out = str_pad($hour, 2, STR_PAD_LEFT) . $min;
          
          if($neg)
          {
               $out = "-" . $out;
          }
          
          return $out;
     }
     
     function excludeTimeZoneFields()
     {
          $filter = $this->data->getFilter();
          if(!$filter)
          {
               $filter = new ExclusionFilter();
          }
               
          $fields = $this->data->getFields();
          $tz_field = false;
          foreach($fields as $name => $type)
          {
               if($name == "begin_timezone")
               {
                    $tz_field = true;
               }
               if($tz_field)
               {
                    $filter->excludeField($name);
               }
               if($name == "end_timezone")
               {
                    $tz_field = false;
               }
          }
     }
     
     function isAllDay($date)
     {
          if(preg_match("/00:00:00$/", $date))
          {
               return true;
          }
     
          return false;
     }
     
     function setAttachment($path)
     {
          //ATTACH;FMTTYPE=image/jpeg:http://domain.com/images/bastille.jpg
     }
     
     function setOrganizer($replyTo, $replyToName = "")
     {
          $this->replyTo = $replyTo;
          $this->replyToName = $replyToName;
     }
          
     function setAttendee($mailTo)
     {
          $this->mailTo = $mailTo;;
     }
     
     function setAttendeeName($name)
     {
          $this->attendeeName = $name;
     }
          
     function formatOrganizer()
     {
          if($this->replyToName)
          {
               $organizer .= ";CN={$this->replyToName}";
          }
          
          $organizer .= ":MAILTO:{$this->replyTo}";
          
          return $organizer;
     }
     
     function formatAttendee()
     {
          if($this->required)
          {
               $attendee .= ";ROLE=REQ-PARTICIPANT";
          }
          
          if($this->attendeeStatus)
          {
               $attendee .= ";PARTSTAT={$this->attendeeStatus}";
          }
          
          if($this->rsvp)
          {
               $attendee .= ";RSVP=true";
          }
          
          if($this->attendeeName)
          {
               $attendee .= ";CN={$this->attendeeName}";    
          }
               
          $attendee .= ":MAILTO:{$this->mailTo}";
          
          return $attendee;
     }
     
     function format()
     {    
          $this->data->organizer = $this->formatOrganizer();
          $this->data->attendee = $this->formatAttendee();
     
          $filter = $this->data->getFilter();
          $fields = $this->data->getFields();
          foreach (array_keys($fields) as $field)
          {
               if ($field != $pk  && !($filter && $filter->isExcluded($field)))
               {
                    $label = strtoupper($field);
                    if(array_key_exists($field, $this->aliases))
                    {
                         $label = $this->aliases[$field];
                    }
                    
                    $value = $this->data->$field;
                    if(!preg_match("/^;|:/", $value))
                    {
                         $value = ":". $value;
                    }
                    $properties[] = $label . $value;
               }
          }
          
          $out = "\r\n";
          $out .= implode("\n", $properties);
          $out .= "\r\n";
          
          return $out;
     }
}?>