private async Task <OrderEntity> TransposeCartToOrder(IList <CartItemViewModel> cart)
{
await ValidateCart(cart);
var productIds = cart.Select(ci => ci.Product.Id);
var products = (await ProductsRepo.FindAll(p => productIds.Any(id => id == p.Id))).ToList();
var ops = (from cartItem in cart
let product = products.First(p => p.Id == cartItem.Product.Id)
select new OrderProductEntity
{
Product = product, UnitPrice = product.Price, Unit = product.Unit, Quantity = cartItem.Quantity
})
.ToList();
return(new OrderEntity
{
Buyer = CurrentBuyerProfile, TotalPrice = ops.Sum(op => op.Quantity * op.UnitPrice), Products = ops
});
}