//This method calculates the number of tickets available to sell
//based on the initial number of tickets available to an event minus the number of tickets
//already sold and the number of tickets that are currently reserved.
public int AvailableAllocation()
{
int salesAndReservations = 0;
PurchasedTickets.ForEach(t => salesAndReservations += t.TicketQuantity);
ReservedTickets.FindAll(r => r.StillActive()).ForEach(r => salesAndReservations += r.TicketQuantity);
return(Allocation - salesAndReservations);
}
//This method creates a TicketPurchase that matches the reserved ticket.
public TicketPurchaseModel PurchaseTicketWith(Guid reservationId)
{
//check if ticket purchase is possible with a certain reservation Id
if (!CanPurchaseTicketWith(reservationId))
{
throw new ApplicationException(
DetermineWhyTicketCannotbePurchasedWith(reservationId));
}
//get the reservation assigned to the reservation Id
TicketReservationModel reservation = GetReservationWith(reservationId);
//Create a new ticket
TicketPurchaseModel ticket = TicketPurchaseFactory.CreateTicket(this, reservation.TicketQuantity);
reservation.HasBeenRedeemed = true;
PurchasedTickets.Add(ticket);
return(ticket);
}
public IEnumerable <Ticket> GetTicketsPurchasedByUser(User user) => PurchasedTickets.Where(x => x.UserId == user.Id);
