public CalculateState TakeSuitableProducts(
IEnumerable <Price> pricing,
CalculateState calculateState)
{
var leftProducts = new LinkedList <TProduct>();
decimal totalPrice = calculateState.LeftProducts.Sum(product => {
var simplePrice = pricing.FirstOrDefault(price =>
(price is SimplePrice) &&
price.Product.Equals(product)) as SimplePrice;
if (simplePrice == null)
{
leftProducts.AddLast(product);
return(0m);
}
return(simplePrice.Price);
});
return(new CalculateState(calculateState.Money + totalPrice, leftProducts));
}
public CalculateState TakeSuitableProducts(
IEnumerable <Price> pricing,
CalculateState calculateState)
{
var productGroups = calculateState.LeftProducts.GroupBy(x => x)
.ToDictionary(x => x.Key, x => x.Count());
var pricingGroupedAroundProduct = pricing.GroupBy(x => x.Product);
var calculatingResult = productGroups.AsParallel().Select(product => {
var productPricings = GetPricesToCheckForProduct(product.Key, pricingGroupedAroundProduct);
return(TakeProduct(product.Key, product.Value, productPricings));
}).Aggregate(
(leftProducts: Enumerable.Empty <TProduct>(), moneyReceived: 0m),
(state, current) => (
state.leftProducts.Concat(Enumerable.Repeat(current.product, current.countProductsLeft)),
state.moneyReceived + current.moneyReceived
)
);
return(new CalculateState(calculateState.Money + calculatingResult.moneyReceived,
calculatingResult.leftProducts));
}