public async Task <IActionResult> Add(CartLine model)
{
try
{
if (ModelState.IsValid)
{
if (!model.AdultTicket.HasValue)
{
model.AdultTicket = 0;
}
if (!model.KidTicket.HasValue)
{
model.KidTicket = 0;
}
if (model.AdultTicket == 0 && model.KidTicket == 0) // if number of tickets = 0
{
ModelState.AddModelError("", "You must choose at least 1 ticket for adult or kid");
}
else
{
bool isAvailableTour = false;
if (!string.IsNullOrWhiteSpace(model.Tour.Id))
{
isAvailableTour = await tourDAL.IsAvailableTourAsync(model.Tour.Id);
}
if (!isAvailableTour)
{
ModelState.AddModelError("", "Tour " + model.Tour.Id.ToUpper() + " is not existed or available");
return(RedirectToAction(nameof(Index))); //if tour is not available then report error at cart view since tour details can be found
}
else
{
int takenSlot = await tourDAL.GetTakenSlotByTourIdAsync(model.Tour.Id);
int maxGuest = await tourDAL.GetMaxGuestByTourIdAsync(model.Tour.Id);
CartLine line = cart.Lines.FirstOrDefault(x => x.Tour.Id == model.Tour.Id); // find if tour is in cart
int totalTicket = (line?.AdultTicket ?? 0) + (line?.KidTicket ?? 0);
if ((totalTicket + model.AdultTicket + model.KidTicket) > (maxGuest - takenSlot))
{
ModelState.AddModelError("", "Not enough tickets. You've already got " + totalTicket + " of this item");
}
else
{
cart.AddItem(model);
return(RedirectToAction(nameof(Index)));
}
}
}
}
return(RedirectToAction("Details", "Tour", new { model.Tour.Id })); //report error at tour details if model properties is invalid or not enough tickets
}
catch (Exception ex)
{
logger.Error(ex.Message);
throw;
}
}