public double GetCouponDiscount()
{
if (AppliedCoupon == null)
{
return(default(double));
}
var cartTotal = LineItems.Sum(a => a.Product.UnitPrice * a.Quantity) - GetCampaignDiscount();
return(_couponCalculator.CalculateFor(AppliedCoupon, cartTotal));
}
public double GetCampaignDiscount()
{
if (AppliedCampaigns.Any())
{
foreach (var appliedCampaign in AppliedCampaigns.OrderByDescending(a => a.AmountOfDiscount))
{
var applicableLineItems = LineItems.Where(a => a.Product.Category.Equals(appliedCampaign.Category)).ToList();
if (applicableLineItems.Count <= appliedCampaign.MinimumItemQuantity)
{
continue;
}
var applicableLineItemsCartTotal = applicableLineItems.Sum(a => a.Product.UnitPrice * a.Quantity);
return(_campaignCalculator.CalculateFor(appliedCampaign, applicableLineItemsCartTotal));
}
}
return(default(double));
}