protected sealed override decimal CalculateImpl(IDiscountCalculationCartInfo cartInfo)
{
if (cartInfo.TryGet(ProductSerialNumber, out ProductAmount pa))
{
// Här borde vi assert amount >= 0 egentligen!
int rebateCount = Math.Max(0, pa.Amount) / BuyX;
return(rebateCount * (BuyX - PayY) * pa.Product.Price);
}
return(0);
}
//private decimal Sum(IReadOnlyDictionary<Product, int> cart)
// => cart.Sum(kvp => kvp.Key.Price * kvp.Value);
protected sealed override decimal CalculateImpl(IDiscountCalculationCartInfo cartInfo)
{
var sum = cartInfo.ArticleValue - cartInfo.AccumulatedDiscount();
return(sum >= MinCartValue ? sum * Percentage : 0);
}
protected abstract decimal CalculateImpl(IDiscountCalculationCartInfo cartInfo);
public decimal Calculate(IDiscountCalculationCartInfo cartInfo) => Math.Round(CalculateImpl(cartInfo), 2, MidpointRounding.AwayFromZero);
