/// <summary>
/// Method used to create total price for the products.
/// </summary>
/// <param name="products">The cart items.</param>
/// <returns>Returns total price.</returns>
public int CalculateTotalPrice(List <char> products)
{
try
{
if (cartEngine != null)
{
//// Step 1 : Apply promotions for orders
if (promotionEngine != null)
{
int promotionTotalPrice = promotionEngine.ApplyPromotion(products);
//// Calculate billing for the non promoted items.
int cartProductTotalPrice = cartEngine.Calculate(promotionEngine.GetNonPromotedItems(products));
return(promotionTotalPrice + cartProductTotalPrice);
}
//// step 2 : Calculate non promotion type if it is exists else calculate complete orders
return(cartEngine.Calculate(products));
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(0);
}