/**
* Returns true or false depending on if the event falls in the specified
* time-range. This is used for filtering purposes.
*
* The rules used to determine if an event falls within the specified
* time-range is based on the CalDAV specification.
*
* @param \DateTime $start
* @param \DateTime $end
* @return bool
*/
public function isInTimeRange(\DateTime $start, \DateTime $end)
{
if ($this->RRULE) {
$it = new VObject\RecurrenceIterator($this);
$it->fastForward($start);
// We fast-forwarded to a spot where the end-time of the
// recurrence instance exceeded the start of the requested
// time-range.
//
// If the starttime of the recurrence did not exceed the
// end of the time range as well, we have a match.
return $it->getDTStart() < $end && $it->getDTEnd() > $start;
}
$effectiveStart = $this->DTSTART->getDateTime();
if (isset($this->DTEND)) {
// The DTEND property is considered non inclusive. So for a 3 day
// event in july, dtstart and dtend would have to be July 1st and
// July 4th respectively.
//
// See:
// http://tools.ietf.org/html/rfc5545#page-54
$effectiveEnd = $this->DTEND->getDateTime();
} elseif (isset($this->DURATION)) {
$effectiveEnd = clone $effectiveStart;
$effectiveEnd->add(VObject\DateTimeParser::parseDuration($this->DURATION));
} elseif (!$this->DTSTART->hasTime()) {
$effectiveEnd = clone $effectiveStart;
$effectiveEnd->modify('+1 day');
} else {
$effectiveEnd = clone $effectiveStart;
}
return $start <= $effectiveEnd && $end > $effectiveStart;
}
/**
* Parses the input data and returns a correct VFREEBUSY object, wrapped in
* a VCALENDAR.
*
* @return Component
*/
public function getResult()
{
$busyTimes = array();
foreach ($this->objects as $object) {
foreach ($object->getBaseComponents() as $component) {
switch ($component->name) {
case 'VEVENT':
$FBTYPE = 'BUSY';
if (isset($component->TRANSP) && strtoupper($component->TRANSP) === 'TRANSPARENT') {
break;
}
if (isset($component->STATUS)) {
$status = strtoupper($component->STATUS);
if ($status === 'CANCELLED') {
break;
}
if ($status === 'TENTATIVE') {
$FBTYPE = 'BUSY-TENTATIVE';
}
}
$times = array();
if ($component->RRULE) {
$iterator = new RecurrenceIterator($object, (string) $component->uid);
if ($this->start) {
$iterator->fastForward($this->start);
}
$maxRecurrences = 200;
while ($iterator->valid() && --$maxRecurrences) {
$startTime = $iterator->getDTStart();
if ($this->end && $startTime > $this->end) {
break;
}
$times[] = array($iterator->getDTStart(), $iterator->getDTEnd());
$iterator->next();
}
} else {
$startTime = $component->DTSTART->getDateTime();
if ($this->end && $startTime > $this->end) {
break;
}
$endTime = null;
if (isset($component->DTEND)) {
$endTime = $component->DTEND->getDateTime();
} elseif (isset($component->DURATION)) {
$duration = DateTimeParser::parseDuration((string) $component->DURATION);
$endTime = clone $startTime;
$endTime->add($duration);
} elseif (!$component->DTSTART->hasTime()) {
$endTime = clone $startTime;
$endTime->modify('+1 day');
} else {
// The event had no duration (0 seconds)
break;
}
$times[] = array($startTime, $endTime);
}
foreach ($times as $time) {
if ($this->end && $time[0] > $this->end) {
break;
}
if ($this->start && $time[1] < $this->start) {
break;
}
$busyTimes[] = array($time[0], $time[1], $FBTYPE);
}
break;
case 'VFREEBUSY':
foreach ($component->FREEBUSY as $freebusy) {
$fbType = isset($freebusy['FBTYPE']) ? strtoupper($freebusy['FBTYPE']) : 'BUSY';
// Skipping intervals marked as 'free'
if ($fbType === 'FREE') {
continue;
}
$values = explode(',', $freebusy);
foreach ($values as $value) {
list($startTime, $endTime) = explode('/', $value);
$startTime = DateTimeParser::parseDateTime($startTime);
if (substr($endTime, 0, 1) === 'P' || substr($endTime, 0, 2) === '-P') {
$duration = DateTimeParser::parseDuration($endTime);
$endTime = clone $startTime;
$endTime->add($duration);
} else {
$endTime = DateTimeParser::parseDateTime($endTime);
}
if ($this->start && $this->start > $endTime) {
continue;
}
if ($this->end && $this->end < $startTime) {
continue;
}
$busyTimes[] = array($startTime, $endTime, $fbType);
}
}
break;
}
}
}
if ($this->baseObject) {
$calendar = $this->baseObject;
} else {
$calendar = new VCalendar();
}
$vfreebusy = $calendar->createComponent('VFREEBUSY');
$calendar->add($vfreebusy);
if ($this->start) {
$dtstart = $calendar->createProperty('DTSTART');
$dtstart->setDateTime($this->start);
$vfreebusy->add($dtstart);
}
if ($this->end) {
$dtend = $calendar->createProperty('DTEND');
$dtend->setDateTime($this->end);
$vfreebusy->add($dtend);
}
$dtstamp = $calendar->createProperty('DTSTAMP');
$dtstamp->setDateTime(new \DateTime('now', new \DateTimeZone('UTC')));
$vfreebusy->add($dtstamp);
foreach ($busyTimes as $busyTime) {
$busyTime[0]->setTimeZone(new \DateTimeZone('UTC'));
$busyTime[1]->setTimeZone(new \DateTimeZone('UTC'));
$prop = $calendar->createProperty('FREEBUSY', $busyTime[0]->format('Ymd\\THis\\Z') . '/' . $busyTime[1]->format('Ymd\\THis\\Z'));
$prop['FBTYPE'] = $busyTime[2];
$vfreebusy->add($prop);
}
return $calendar;
}
/**
* If this calendar object, has events with recurrence rules, this method
* can be used to expand the event into multiple sub-events.
*
* Each event will be stripped from it's recurrence information, and only
* the instances of the event in the specified timerange will be left
* alone.
*
* In addition, this method will cause timezone information to be stripped,
* and normalized to UTC.
*
* This method will alter the VCalendar. This cannot be reversed.
*
* This functionality is specifically used by the CalDAV standard. It is
* possible for clients to request expand events, if they are rather simple
* clients and do not have the possibility to calculate recurrences.
*
* @param DateTime $start
* @param DateTime $end
* @return void
*/
public function expand(\DateTime $start, \DateTime $end)
{
$newEvents = array();
foreach ($this->select('VEVENT') as $key => $vevent) {
if (isset($vevent->{'RECURRENCE-ID'})) {
unset($this->children[$key]);
continue;
}
if (!$vevent->rrule) {
unset($this->children[$key]);
if ($vevent->isInTimeRange($start, $end)) {
$newEvents[] = $vevent;
}
continue;
}
$uid = (string) $vevent->uid;
if (!$uid) {
throw new \LogicException('Event did not have a UID!');
}
$it = new VObject\RecurrenceIterator($this, $vevent->uid);
$it->fastForward($start);
while ($it->valid() && $it->getDTStart() < $end) {
if ($it->getDTEnd() > $start) {
$newEvents[] = $it->getEventObject();
}
$it->next();
}
unset($this->children[$key]);
}
// Setting all properties to UTC time.
foreach ($newEvents as $newEvent) {
foreach ($newEvent->children as $child) {
if ($child instanceof VObject\Property\ICalendar\DateTime && $child->hasTime()) {
$dt = $child->getDateTimes();
// We only need to update the first timezone, because
// setDateTimes will match all other timezones to the
// first.
$dt[0]->setTimeZone(new \DateTimeZone('UTC'));
$child->setDateTimes($dt);
}
}
$this->add($newEvent);
}
// Removing all VTIMEZONE components
unset($this->VTIMEZONE);
}