public async Task <ActionResult <CartItem> > PostCartItem(CartItem cart)
{
if (cart == null)
{
throw new System.ArgumentNullException(nameof(cart));
}
else if (cart.BookItems == null)
{
throw new System.ArgumentNullException(nameof(cart.BookItems));
}
// Validate user
var userId = cart.UserId;
var userName = cart.UserName;
var password = cart.Password;
// If validation fails, return bad request
if (!CommonOperations.ValidateUser(userId, userName, password))
{
return(BadRequest());
}
// Retrieving all books from cart
ICollection <BookItem> books = await CommonOperations.ExtractBooks(cart, _context);
cart.BookItems = books;
// Setting the initial status
cart.Status = "open";
_context.CartItems.Add(cart);
await _context.SaveChangesAsync();
return(CreatedAtAction(nameof(GetCartItem), new { id = cart.CartId }, cart));
}