/**
* Merges all calendar objects, and builds one big ics export
*
* @param array $nodes
* @return string
*/
public function generateICS(array $nodes)
{
$calendar = new VObject\Component\VCalendar();
$calendar->version = '2.0';
if (DAV\Server::$exposeVersion) {
$calendar->prodid = '-//SabreDAV//SabreDAV ' . DAV\Version::VERSION . '//EN';
} else {
$calendar->prodid = '-//SabreDAV//SabreDAV//EN';
}
$calendar->calscale = 'GREGORIAN';
$collectedTimezones = array();
$timezones = array();
$objects = array();
foreach ($nodes as $node) {
if (!isset($node[200]['{' . Plugin::NS_CALDAV . '}calendar-data'])) {
continue;
}
$nodeData = $node[200]['{' . Plugin::NS_CALDAV . '}calendar-data'];
$nodeComp = VObject\Reader::read($nodeData);
foreach ($nodeComp->children() as $child) {
switch ($child->name) {
case 'VEVENT':
case 'VTODO':
case 'VJOURNAL':
$objects[] = $child;
break;
// VTIMEZONE is special, because we need to filter out the duplicates
// VTIMEZONE is special, because we need to filter out the duplicates
case 'VTIMEZONE':
// Naively just checking tzid.
if (in_array((string) $child->TZID, $collectedTimezones)) {
continue;
}
$timezones[] = $child;
$collectedTimezones[] = $child->TZID;
break;
}
}
}
foreach ($timezones as $tz) {
$calendar->add($tz);
}
foreach ($objects as $obj) {
$calendar->add($obj);
}
return $calendar->serialize();
}
