/**
* Get the kolab_calendar instance for the given calendar ID
*
* @param string Calendar identifier (encoded imap folder name)
* @return object kolab_calendar Object nor null if calendar doesn't exist
*/
public function get_calendar($id)
{
// create calendar object if necesary
if (!$this->calendars[$id] && in_array($id, array(self::INVITATIONS_CALENDAR_PENDING, self::INVITATIONS_CALENDAR_DECLINED))) {
$this->calendars[$id] = new kolab_invitation_calendar($id, $this->cal);
} else {
if (!$this->calendars[$id] && $id !== self::BIRTHDAY_CALENDAR_ID) {
$calendar = kolab_calendar::factory($id, $this->cal);
if ($calendar->ready) {
$this->calendars[$calendar->id] = $calendar;
}
}
}
return $this->calendars[$id];
}
