public void ApplyBestCampaign(IEnumerable <Campaign> campaigns)
{
// Get all categories of product (get current and its ancestors categories)
var productCategories = this.Product.GetAllCategories();
//Only campaigns that has same category with product can be applied. So, filter campaigns if they are in those categories.
var applicableCampaigns = campaigns.Where(c => productCategories.Contains(c.Category));
foreach (var campaign in applicableCampaigns)
{
//Check if applicable and calculate the discount if its applicable otherwise discount is 0.
var discountAmount = campaign.IsApplicable(this.OrderQuantity) ? campaign.CalculateDiscount(this.OrderQuantity * this.Product.UnitPrice) : 0;
if (this.BestCampaignDiscount.DiscountAmount < discountAmount)
{
this.BestCampaignDiscount = this.BestCampaignDiscount.Update(campaign, discountAmount);
}
}
}
public ShoppingCartItem(Product product, double orderQuantity)
{
this.Product = product;
this.OrderQuantity = orderQuantity;
this.BestCampaignDiscount = new CampaignDiscountModel();
}
