public int Checkin(IStation station, double duration)
{
if (durationValid(this.CheckInTime, duration))
{
double hours = requestTimeFrame(this.CheckInTime, duration);
int confCode = ProcessTransaction(createHoursArray(hours), TransactionType.SALE);
this.appointmentStation = station;
appointmentStation.open_door();
return(confCode);
}
return((int)ErrorCode.DUR_INV);
}