/**
* Count all salles before a given date
*
* @param date $before If null, count all operations ever
*
* @return int
*/
static function countSallesDaily($before = null)
{
$salle = new CSalle();
$nb_salles = $salle->countList();
$first_date = self::getMinDate();
$day_relative = CMbDT::daysRelative($first_date, CMbDT::date($before));
return $nb_salles * $day_relative;
}
