function prepareInputForAdd($input)
{
// Check override of segment : do not add
if (count(self::getSegmentsBetween($input['calendars_id'], $input['day'], $input['begin'], $input['day'], $input['end'])) > 0) {
Session::addMessageAfterRedirect(__('Can not add a range riding an existing period'), false, ERROR);
return false;
}
return parent::prepareInputForAdd($input);
}