private function validateTimeRangeFilterForTodo(SimpleXMLElement $xml, $currentXPath, array $filter)
{
// Gathering all relevant elements
$dtStart = null;
$duration = null;
$due = null;
$completed = null;
$created = null;
$xdt = $xml->xpath($currentXPath . '/c:dtstart');
if (count($xdt)) {
// The dtstart can be both a date, or datetime property
if ((string) $xdt[0]['value'] === 'DATE') {
$isDateTime = false;
} else {
$isDateTime = true;
}
// Determining the timezone
if ($tzid = (string) $xdt[0]['tzid']) {
$tz = new DateTimeZone($tzid);
} else {
$tz = null;
}
if ($isDateTime) {
$dtStart = Sabre_CalDAV_XMLUtil::parseICalendarDateTime((string) $xdt[0], $tz);
} else {
$dtStart = Sabre_CalDAV_XMLUtil::parseICalendarDate((string) $xdt[0]);
}
}
// Only need to grab duration if dtStart is set
if (!is_null($dtStart)) {
$xduration = $xml->xpath($currentXPath . '/c:duration');
if (count($xduration)) {
$duration = Sabre_CalDAV_XMLUtil::parseICalendarDuration((string) $xduration[0]);
}
}
if (!is_null($dtStart) && !is_null($duration)) {
// Comparision from RFC 4791:
// (start <= DTSTART+DURATION) AND ((end > DTSTART) OR (end >= DTSTART+DURATION))
$end = clone $dtStart;
$end->modify($duration);
if ((is_null($filter['time-range']['start']) || $filter['time-range']['start'] <= $end) && (is_null($filter['time-range']['end']) || $filter['time-range']['end'] > $dtStart || $filter['time-range']['end'] >= $end)) {
return true;
} else {
return false;
}
}
// Need to grab the DUE property
$xdt = $xml->xpath($currentXPath . '/c:due');
if (count($xdt)) {
// The due property can be both a date, or datetime property
if ((string) $xdt[0]['value'] === 'DATE') {
$isDateTime = false;
} else {
$isDateTime = true;
}
// Determining the timezone
if ($tzid = (string) $xdt[0]['tzid']) {
$tz = new DateTimeZone($tzid);
} else {
$tz = null;
}
if ($isDateTime) {
$due = Sabre_CalDAV_XMLUtil::parseICalendarDateTime((string) $xdt[0], $tz);
} else {
$due = Sabre_CalDAV_XMLUtil::parseICalendarDate((string) $xdt[0]);
}
}
if (!is_null($dtStart) && !is_null($due)) {
// Comparision from RFC 4791:
// ((start < DUE) OR (start <= DTSTART)) AND ((end > DTSTART) OR (end >= DUE))
if ((is_null($filter['time-range']['start']) || $filter['time-range']['start'] < $due || $filter['time-range']['start'] < $dtstart) && (is_null($filter['time-range']['end']) || $filter['time-range']['end'] >= $due)) {
return true;
} else {
return false;
}
}
if (!is_null($dtStart)) {
// Comparision from RFC 4791
// (start <= DTSTART) AND (end > DTSTART)
if ((is_null($filter['time-range']['start']) || $filter['time-range']['start'] <= $dtStart) && (is_null($filter['time-range']['end']) || $filter['time-range']['end'] > $dtStart)) {
return true;
} else {
return false;
}
}
if (!is_null($due)) {
// Comparison from RFC 4791
// (start < DUE) AND (end >= DUE)
if ((is_null($filter['time-range']['start']) || $filter['time-range']['start'] < $due) && (is_null($filter['time-range']['end']) || $filter['time-range']['end'] >= $due)) {
return true;
} else {
return false;
}
}
// Need to grab the COMPLETED property
$xdt = $xml->xpath($currentXPath . '/c:completed');
if (count($xdt)) {
$completed = Sabre_CalDAV_XMLUtil::parseICalendarDateTime((string) $xdt[0]);
}
// Need to grab the CREATED property
$xdt = $xml->xpath($currentXPath . '/c:created');
if (count($xdt)) {
$created = Sabre_CalDAV_XMLUtil::parseICalendarDateTime((string) $xdt[0]);
}
if (!is_null($completed) && !is_null($created)) {
// Comparison from RFC 4791
// ((start <= CREATED) OR (start <= COMPLETED)) AND ((end >= CREATED) OR (end >= COMPLETED))
if ((is_null($filter['time-range']['start']) || $filter['time-range']['start'] <= $created || $filter['time-range']['start'] <= $completed) && (is_null($filter['time-range']['end']) || $filter['time-range']['end'] >= $created || $filter['time-range']['end'] >= $completed)) {
return true;
} else {
return false;
}
}
if (!is_null($completed)) {
// Comparison from RFC 4791
// (start <= COMPLETED) AND (end >= COMPLETED)
if ((is_null($filter['time-range']['start']) || $filter['time-range']['start'] <= $completed) && (is_null($filter['time-range']['end']) || $filter['time-range']['end'] >= $completed)) {
return true;
} else {
return false;
}
}
if (!is_null($created)) {
// Comparison from RFC 4791
// (end > CREATED)
if (is_null($filter['time-range']['end']) || $filter['time-range']['end'] > $created) {
return true;
} else {
return false;
}
}
// Everything else is TRUE
return true;
}
/**
* @depends testParseICalendarDate
* @expectedException Sabre_DAV_Exception_BadRequest
*/
function testParseICalendarDateBadFormat()
{
$dateTime = Sabre_CalDAV_XMLUtil::parseICalendarDate('20100316T141405');
}
