readme.md

Limiting applied promotions

A way to limit the total amount of discounts apllied.

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ApplyDiscounts.cs

        private IEnumerable<RewardDescription> ApplyDiscounts(ICart cart)
        {
            IOrderForm orderForm = cart.GetFirstForm();

            if (orderForm == null)
            {
                return new List<RewardDescription>();
            }


            decimal total = orderForm.Shipments.Sum(shipment => shipment.LineItems.Sum(item => item.PlacedPrice * item.Quantity));
            
            if (total <= 0)
            {
                return new List<RewardDescription>();
            }

            List<ContentReference> items = new List<ContentReference>();

            foreach (IShipment shipment in orderForm.Shipments)
            {
                items.AddRange(shipment.LineItems.Select(li => li.GetEntryContent().ContentLink));
            }

            IEnumerable<RewardDescription> rewards = this._promotionEngine.Evaluate(items, this._currentMarket.GetCurrentMarket(), cart.Currency, RequestFulfillmentStatus.Fulfilled);

            decimal totalDiscount = rewards.Sum(rewardDescription => rewardDescription.SavedAmount);

            return totalDiscount <= (total / 2) ? cart.ApplyDiscounts(this._promotionEngine, new PromotionEngineSettings()) : new List<RewardDescription>();
        }