Exemplo n.º 1
0
/**
 * 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);
}