public async Task Add(Guid reservationId, Guid userId, ReservationOffer request)
{
var offer = await _reservationsQuerier.GetReservationOffer(request.OfferRequest);
if (!offer.Equals(request))
{
throw new Exception("Offer has expired.");
}
if (AnyPlaceIsInvalid(request.OfferRequest.Places))
{
throw new Exception("Invalid place configuration.");
}
Show show = await _ctx.Shows.Include(s => s.Reservations).FirstOrDefaultAsync(s => s.Id == request.OfferRequest.ShowId);
if (show is null)
{
throw new KeyNotFoundException(nameof(request.OfferRequest.ShowId));
}
User user = await _ctx.Users.FindAsync(userId);
if (user is null)
{
throw new KeyNotFoundException(nameof(userId));
}
Reservation reservation = ReservationFactory.Create(reservationId, user);
AddPlacesToReservation(request.OfferRequest.Places, reservation);
show.AddReservation(reservation);
await _ctx.SaveChangesAsync();
_emailSender.Send(new Email()); //TODO
}