public TicketReservation ReserveTicket(int tktQty)
{
if (!CanReserveTicket(tktQty))
{
ThrowExceptionWithDetailsOnWhyTicketsCannotBeReserved();
}
TicketReservation reservation = TicketReservationFactory.CreateReservation(this, tktQty);
ReservedTickets.Add(reservation);
return(reservation);
}
public TicketPurchase PurchaseTicketWith(Guid reservationId)
{
if (!CanPurchaseTicketWith(reservationId))
{
throw new ApplicationException(DetermineWhyATicketCannotbePurchasedWith(reservationId));
}
TicketReservation reservation = GetReservationWith(reservationId);
TicketPurchase ticket = TicketPurchaseFactory.CreateTicket(this, reservation.TicketQuantity);
reservation.HasBeenRedeemed = true;
PurchasedTickets.Add(ticket);
return(ticket);
}
public string DetermineWhyATicketCannotbePurchasedWith(Guid reservationId)
{
string reservationIssue = "";
if (HasReservationWith(reservationId))
{
TicketReservation reservation = GetReservationWith(reservationId);
if (reservation.HasExpired())
{
reservationIssue =
String.Format("Ticket reservation ‘{0}’ has expired", reservationId.ToString());
}
else if (reservation.HasBeenRedeemed)
{
reservationIssue = String.Format("Ticket reservation ‘{0}’ has already been redeemed", reservationId.ToString());
}
}
else
{
reservationIssue = String.Format("There is no ticket reservation with the Id ‘{0}’", reservationId.ToString());
}
return(reservationIssue);
}