/**
* @param ExistingReservationSeries $series
* @return mixed|null|string
*/
private function CheckCapacityAndReturnAnyError($series)
{
foreach ($series->AllResources() as $resource) {
if (!$resource->HasMaxParticipants()) {
continue;
}
/** @var $instance Reservation */
foreach ($series->Instances() as $instance) {
$numberOfParticipants = count($instance->Participants());
if ($numberOfParticipants > $resource->GetMaxParticipants()) {
return Resources::GetInstance()->GetString('MaxParticipantsError', array($resource->GetName(), $resource->GetMaxParticipants()));
}
}
}
return null;
}
