public function CheckBookingPossibility(Apartment $app, $pax)
 {
     /* Avalibility check. Expecting TRUE or FALSE  */
     $avalibility = $app->CheckBookingsInPeriod($this->date_from, $this->date_to);
     /* Are dates valid for individual apartment ? */
     $dates = true;
     /* Minimum or maximum pax for individual apartment or ... ? */
     $pax_valid = false;
     if ($pax >= 1 && $pax <= $app->getMaxPax()) {
         $pax_valid = true;
     }
     /* Are there periods for dates... Can we get real price ? */
     $price = false;
     if (Booking::CalculatePrice($app, $this->date_from, $this->date_to) > 0) {
         $price = true;
     }
     if ($dates === true && $avalibility === false && $pax_valid === true && $price === true) {
         return $this;
     } else {
         return false;
     }
 }