internal bool ApplyPromotion()
{
try
{
appliedOffer = promotionService.ApplyPromotion(checkoutList, GetProductOffers());
return(true);
}
catch (Exception ex)
{
LogWriter.LogWrite("Error in Applying Promotio :" + ex.Message);
}
return(false);
}
/// <summary>
/// Apply Promotion
/// </summary>
/// <param name="checkoutList"></param>
/// <param name="promotions"></param>
/// <returns></returns>
public AppliedOffer ApplyPromotion(List <ProductCheckout> checkoutList, List <Promotion> promotions)
{
AppliedOffer appliedOffer = new AppliedOffer();
//Here Strategy pattern allows a to choose an algorithm from a family of Promotion algorithms
List <IPromotionStrategy> strategies = new List <IPromotionStrategy>();
strategies.Add(new AdditionalItemOffer());
strategies.Add(new ComboOffer());
try
{
foreach (ProductCheckout item in checkoutList)
{
if (item.Quantity > 0)
{
foreach (var strategy in strategies)
{
if (strategy.CanExecute(item, promotions))
{
item.HasOffer = true;
item.FinalPrice = strategy.CalculateProductPrice(checkoutList);
appliedOffer.TotalPrice += item.FinalPrice;
break;
}
}
}
}
appliedOffer.Checkouts = checkoutList;
}
catch (Exception ex)
{
LogWriter.LogWrite("Error in Applying Promotion in PromotionStrategy:" + ex.Message);
}
return(appliedOffer);
}
