/** * Parses some information from calendar objects, used for optimized * calendar-queries. * * Blantently copied from Sabre_CalDAV_Backend_PDO * * Returns an array with the following keys: * * etag * * size * * componentType * * firstOccurence * * lastOccurence * * @param string $calendarData * @return array */ function getDenormalizedData($calendarData) { $vObject = Sabre_VObject_Reader::read($calendarData); $componentType = null; $component = null; $firstOccurence = null; $lastOccurence = null; foreach ($vObject->getComponents() as $component) { if ($component->name !== 'VTIMEZONE') { $componentType = $component->name; break; } } if (!$componentType) { throw new Sabre_DAV_Exception_BadRequest('Calendar objects must have a VJOURNAL, VEVENT or VTODO component'); } if ($componentType === 'VEVENT') { $firstOccurence = $component->DTSTART->getDateTime()->getTimeStamp(); // Finding the last occurence is a bit harder if (!isset($component->RRULE)) { if (isset($component->DTEND)) { $lastOccurence = $component->DTEND->getDateTime()->getTimeStamp(); } elseif (isset($component->DURATION)) { $endDate = clone $component->DTSTART->getDateTime(); $endDate->add(Sabre_VObject_DateTimeParser::parse($component->DURATION->value)); $lastOccurence = $endDate->getTimeStamp(); } elseif ($component->DTSTART->getDateType() === Sabre_VObject_Property_DateTime::DATE) { $endDate = clone $component->DTSTART->getDateTime(); $endDate->modify('+1 day'); $lastOccurence = $endDate->getTimeStamp(); } else { $lastOccurence = $firstOccurence; } } else { $it = new Sabre_VObject_RecurrenceIterator($vObject, (string) $component->UID); $maxDate = new DateTime(self::MAX_DATE); if ($it->isInfinite()) { $lastOccurence = $maxDate->getTimeStamp(); } else { $end = $it->getDtEnd(); while ($it->valid() && $end < $maxDate) { $end = $it->getDtEnd(); $it->next(); } $lastOccurence = $end->getTimeStamp(); } } } return array('etag' => md5($calendarData), 'size' => strlen($calendarData), 'componentType' => $componentType, 'firstOccurence' => $firstOccurence, 'lastOccurence' => $lastOccurence); }