public async Task <CartModel> Handle(AddBookToCartCommand request, CancellationToken cancellationToken)
{
var book = await _dbContext.Books.SingleOrDefaultAsync(
x => x.Id == request.BookId,
cancellationToken);
if (book == null)
{
throw NotFoundError.CreateForResource(nameof(Book), request.BookId).ToException();
}
Cart cart = null;
if (request.CartId != null)
{
cart = await _dbContext.Carts.Include(x => x.Books).SingleOrDefaultAsync(
x => x.Id == request.CartId.Value,
cancellationToken);
}
if (cart == null)
{
cart = new Cart(book, request.CartId);
await _dbContext.Carts.AddAsync(cart, cancellationToken);
}
else
{
cart.AddBook(book);
}
await _dbContext.SaveChangesAsync(cancellationToken);
var cartModel = _mapper.Map <CartModel>(cart);
return(cartModel);
}
public Task <BookModel> Handle(GetBookQuery request, CancellationToken cancellationToken)
{
var book = _mapper
.ProjectTo <BookModel>(_dbContext.Books)
.FirstOrDefaultAsync(x => x.Id == request.BookId, cancellationToken);
if (book == null)
{
throw NotFoundError.CreateForResource(nameof(Book), request.BookId).ToException();
}
return(book);
}
public async Task <OrderModel> Handle(SubmitOrderCommand request, CancellationToken cancellationToken)
{
var cart = await _dbContext.Carts
.Include(x => x.Books)
.SingleOrDefaultAsync(
x => x.Id == request.CartId, cancellationToken);
if (cart == null)
{
throw NotFoundError.CreateForResource(nameof(Cart), request.CartId).ToException();
}
var order = new Order(cart, request.PhoneNumber);
await _dbContext.AddAsync(order, cancellationToken);
_dbContext.Remove(cart);
await _dbContext.SaveChangesAsync(cancellationToken);
return(_mapper.Map <OrderModel>(order));
}