/**
* Checks based on the contained FREEBUSY information, if a timeslot is
* available.
*
* @param DateTime $start
* @param Datetime $end
* @return bool
*/
public function isFree(\DateTime $start, \Datetime $end)
{
foreach ($this->select('FREEBUSY') as $freebusy) {
// We are only interested in FBTYPE=BUSY (the default),
// FBTYPE=BUSY-TENTATIVE or FBTYPE=BUSY-UNAVAILABLE.
if (isset($freebusy['FBTYPE']) && strtoupper(substr((string) $freebusy['FBTYPE'], 0, 4)) !== 'BUSY') {
continue;
}
// The freebusy component can hold more than 1 value, separated by
// commas.
$periods = explode(',', (string) $freebusy);
foreach ($periods as $period) {
// Every period is formatted as [start]/[end]. The start is an
// absolute UTC time, the end may be an absolute UTC time, or
// duration (relative) value.
list($busyStart, $busyEnd) = explode('/', $period);
$busyStart = VObject\DateTimeParser::parse($busyStart);
$busyEnd = VObject\DateTimeParser::parse($busyEnd);
if ($busyEnd instanceof \DateInterval) {
$tmp = clone $busyStart;
$tmp->add($busyEnd);
$busyEnd = $tmp;
}
if ($start < $busyEnd && $end > $busyStart) {
return false;
}
}
}
return true;
}
/**
* Parses some information from calendar objects, used for optimized
* calendar-queries.
*
* Returns an array with the following keys:
* * etag
* * size
* * componentType
* * firstOccurence
* * lastOccurence
*
* @param string $calendarData
* @return array
*/
protected function getDenormalizedData($calendarData)
{
$vObject = VObject\Reader::read($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 \SabreForRainLoop\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();
$endDate->add(VObject\DateTimeParser::parse($component->DURATION->getValue()));
$lastOccurence = $endDate->getTimeStamp();
} elseif (!$component->DTSTART->hasTime()) {
$endDate = clone $component->DTSTART->getDateTime();
$endDate->modify('+1 day');
$lastOccurence = $endDate->getTimeStamp();
} else {
$lastOccurence = $firstOccurence;
}
} else {
$it = new VObject\RecurrenceIterator($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);
}
/**
* Returns multiple date-time values.
*
* @return \DateTime[]
*/
public function getDateTimes()
{
// Finding the timezone.
$tz = $this['TZID'];
if ($tz) {
$tz = TimeZoneUtil::getTimeZone((string) $tz, $this->root);
}
$dts = array();
foreach ($this->getParts() as $part) {
$dts[] = DateTimeParser::parse($part, $tz);
}
return $dts;
}
