public override string ToString()
{
var header = "List of items in basket:\n";
var itemsMsg = Items.Aggregate(header,
(x, y) => $"{x}{y.Product.Name}: {y.Num}, price: {y.GetPrice()} ({y.Product.Price} per unit)\n");
var msg = Discounts.Aggregate("", (x, y) => $"{x}{y.GetDescription()}\n");
var total = $"Total amount: {Total}\n";
return(Discounts.Any() ? $"{itemsMsg}\n{msg}\n{total}" : total);
}
public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
var nullProduct = Products.Any(x => x == null);
if (nullProduct)
{
yield return(new ValidationResult("No products in the order"));
}
var emptyProductId = Products.Any(x => x.Id == Guid.Empty);
if (emptyProductId)
{
yield return(new ValidationResult("Product ID is empty"));
}
var invalidProductCounter = Products.Any(x => x.Count <= 0);
if (invalidProductCounter)
{
yield return(new ValidationResult("Invalid product counter"));
}
var nullDiscount = Discounts.Any(x => x == null);
if (!nullDiscount)
{
var emptyDiscountId = Discounts.Any(x => x.Id == Guid.Empty);
if (emptyDiscountId)
{
yield return(new ValidationResult("Discount ID is empty"));
}
var invalidDiscountCounter = Discounts.Any(x => x.Count <= 0);
if (invalidDiscountCounter)
{
yield return(new ValidationResult("Invalid discount counter"));
}
}
}