public async Task <string> PostNewBooking(BookingModel bookingModel)
{
// not paraler, like Task.WhenAll() since they are accesing the same resource
var garage = await _garageData.GetByName(bookingModel.GarageName);
if (garage == null)
{
throw new ArgumentException("Garage unknown");
}
// get or add could be fine there
CarModel car = await _carData.GetByLicencePlate(bookingModel.CarLicencePlate);
if (car == null)
{
await _carData.AddCar(new CarModel()
{
LicencePlate = bookingModel.CarLicencePlate
});
car = await _carData.GetByLicencePlate(bookingModel.CarLicencePlate);
if (car == null)
{
throw new ArgumentNullException("Cannot store the car, database error");
}
}
var bookingsList = await _bookingData.GetAllBetweenDates(bookingModel.StartDateUtc, bookingModel.EndDateUtc);
if (bookingsList == null)
{
throw new ArgumentNullException("Cannot get current bookings information, database error");
}
if (bookingsList.Count >= garage.Capacity)
{
return("Garage is full");
}
bookingModel.CarId = car.Id;
bookingModel.GarageId = garage.Id;
bookingModel.ConfirmationNumber = Guid.NewGuid().ToString(); // for simplicity
var retObj = await _bookingData.SaveBooking(bookingModel);
if (retObj == null)
{
throw new ArgumentNullException("Cannot save the booking, Database Error");
}
return(retObj.ConfirmationNumber);
}