static function GetRequestedServicePeriod($date = false)
{
if ($date === false) {
$date = time();
}
if (empty(self::$requestedServicePeriod) || $date - 10 * 60 > self::$spAge) {
if (empty($_GET['serviceperiod']) === false) {
self::$requestedServicePeriod = new ServicePeriod((int) $_GET['serviceperiod']);
} else {
self::$requestedServicePeriod = ServicePeriod::GetServicePeriod($date);
}
self::$spAge = time();
}
if (empty(self::$requestedServicePeriod)) {
// still empty - an appropriate SP was not found
self::$requestedServicePeriod = new ServicePeriod();
}
return self::$requestedServicePeriod;
}