private double getAvailableCampaignDiscountByProduct(Dictionary <string, double> calculatedDiscounts, Tuple <Campaign, double> campaignWithDiscount, Product product)
{
double productDiscount = 0.0;
if (campaignWithDiscount.Item1 == null)
{
return(productDiscount);
}
if (campaignWithDiscount.Item1.Category != product.Category)
{
return(productDiscount);
}
if (calculatedDiscounts != null)
{
if (calculatedDiscounts.TryGetValue(product.Category.Title, out double discount))
{
return(discount);
}
}
var selectedShoppingCartItemsByCategory = ShoppingCartItems.Where(it => it.Key.Category == campaignWithDiscount.Item1.Category).ToDictionary(it => it.Key, it => it.Value);
if (selectedShoppingCartItemsByCategory.Count > 0)
{
productDiscount = campaignWithDiscount.Item2 / selectedShoppingCartItemsByCategory.Count;
calculatedDiscounts.Add(product.Category.Title, productDiscount);
}
return(productDiscount);
}
private double calculateCampaignDiscount(Campaign campaign)
{
if (campaign == null)
{
throw new ArgumentNullException("campaign is Null");
}
double totalAmount = 0;
int totalNumberOfProduct = 0;
double campaignDiscount = 0;
var selectedShoppingCartItemsByCategory = ShoppingCartItems.Where(it => it.Key.Category == campaign.Category).ToDictionary(it => it.Key, it => it.Value);
foreach (var item in selectedShoppingCartItemsByCategory)
{
totalNumberOfProduct += item.Value;
totalAmount += (item.Value * item.Key.Price);
}
if (totalNumberOfProduct <= campaign.MinimumAmount)
{
return(campaignDiscount);
}
if (campaign.DiscountType == DiscountType.Rate)
{
campaignDiscount = totalAmount * (campaign.DiscountAmount / 100);
}
else
{
campaignDiscount = campaign.DiscountAmount;
}
return(campaignDiscount);
}
public void RemoveFromCart(Product product)
{
var productInItem = ShoppingCartItems.Where(x => x.Product.Equals(product)).FirstOrDefault();
if (productInItem != null)
{
ShoppingCartItems.Remove(productInItem);
}
}
