public ProductState ProductCanBePurchased(Cart cart)
{
ISpecification <Product> faultyProductSpec = new ProductReturnReasonSpec(ReturnReason.Faulty);
foreach (var cartProduct in cart.Products)
{
var product = productRepository.FindById(cartProduct.ProductId);
if (product == null)
{
throw new Exception($"Product {cartProduct.ProductId} not found");
}
var isInStock = new ProductIsInStockSpec(cartProduct).IsSatisfiedBy(product);
if (!isInStock)
{
return(ProductState.NotInStock);
}
var isFaulty = faultyProductSpec.IsSatisfiedBy(product);
if (isFaulty)
{
return(ProductState.IsFaulty);
}
}
return(ProductState.OK);
}
public virtual Nullable <ProductIssues> IsPurchaseReady()
{
ISpecification <Product> faultyProductSpec = new ProductReturnReasonSpec(ReturnReason.Faulty);
foreach (CartProduct cartProduct in this.Products)
{
bool isInStock = new ProductIsInStockSpec(cartProduct)
.IsSatisfiedBy(cartProduct.Product);
if (!isInStock)
{
return(ProductIssues.NotInStock);
}
bool isFaulty = faultyProductSpec.IsSatisfiedBy(cartProduct.Product);
if (isFaulty)
{
return(ProductIssues.IsFaulty);
}
}
return(null);
}
