public int CalculateBasketPrice(AggregateProduct products)
{
// find offer with greater total.
var prefredSpecial = products.Specials.FirstOrDefault(x => x.Total == products.Specials.Max(e => e.Total));
// to remove overlap between specials and our baseket.
foreach (var item in prefredSpecial.Products)
{
var current = products.Products.FirstOrDefault(x => x.Name == item.Name);
// assume we use greater special even we can't use all of them.
if (current.Quantity < item.Quantity)
{
current.Quantity = 0;
}
current.Quantity -= item.Quantity;
}
// calculate basket price without specials.
int basketPrice = products.Products.Sum(x => x.Quantity * x.Price);
// sum basket price and specials as result.
int result = basketPrice + prefredSpecial.Total;
return(result);
}
public int Calculate(AggregateProduct products)
{
return(_basketService.CalculateBasketPrice(products));
}
public static AggregateProduct CreateAggregateProduct(global::System.Guid ID)
{
AggregateProduct aggregateProduct = new AggregateProduct();
aggregateProduct.Id = ID;
return aggregateProduct;
}
public void AddToProducts(AggregateProduct aggregateProduct)
{
base.AddObject("Products", aggregateProduct);
}
