public function beforeGetProperties($uri, Sabre_DAV_INode $node, &$requestedProperties, &$returnedProperties)
{
parent::beforeGetProperties($uri, $node, $requestedProperties, $returnedProperties);
if (false !== ($index = array_search('{DAV:}principal-URL', $requestedProperties))) {
unset($requestedProperties[$index]);
$returnedProperties[200]['{DAV:}principal-URL'] = new Sabre_DAV_Property_Href('principals/users/' . strtolower($_SERVER["PHP_AUTH_USER"]) . '/');
}
if (false !== ($index = array_search('{urn:ietf:params:xml:ns:caldav}calendar-home-set', $requestedProperties))) {
unset($requestedProperties[$index]);
$returnedProperties[200]['{urn:ietf:params:xml:ns:caldav}calendar-home-set'] = new Sabre_DAV_Property_Href('calendars/' . strtolower($_SERVER["PHP_AUTH_USER"]) . '/');
}
}
