public CheckoutTransaction(ProductCatalog productCatalog, Promotions promotions)
{
this._productCatalog = productCatalog;
_promotions = promotions;
_items = new List<string>();
this.Bill = new Bill(_items, _productCatalog, _promotions);
}
public Bill(IList<string> items, ProductCatalog productCatalog, Promotions promotions)
{
_items = items;
_productCatalog = productCatalog;
_promotions = promotions;
CalculateBill();
}
public LineItem(string barcode, int quantity, ProductCatalog productCatalog, Promotions promotions)
{
_productCatalog = productCatalog;
_promotions = promotions;
Barcode = barcode;
Quantity = quantity;
DiscountNote = "";
CalculatePriceAndSubTotal();
}