public PromotionResult EvaluatePromotion(IEvaluationContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var promoContext = context as PromotionEvaluationContext;
if (promoContext == null)
{
throw new ArgumentException($"{nameof(context)} type {context.GetType()} must be derived from PromotionEvaluationContext");
}
var promotions = _promotionSearchService.SearchPromotions(new PromotionSearchCriteria {
OnlyActive = true, Store = promoContext.StoreId, Take = int.MaxValue
}).Results;
var result = new PromotionResult();
var rewards = promotions.SelectMany(x => x.EvaluatePromotion(context)).Where(x => x.IsValid).ToArray();
var firstOrderExlusiveReward = rewards.FirstOrDefault(x => x.Promotion.IsExclusive);
if (firstOrderExlusiveReward != null)
{
//Add only rewards from exclusive promotion
result.Rewards.AddRange(rewards.Where(x => x.Promotion == firstOrderExlusiveReward.Promotion));
}
else
{
//best shipment promotion
var curShipmentAmount = promoContext.ShipmentMethodCode != null ? promoContext.ShipmentMethodPrice : 0m;
var allShipmentRewards = rewards.OfType <ShipmentReward>().ToArray();
var groupedByShippingMethodRewards = allShipmentRewards.GroupBy(x => x.ShippingMethod).Where(x => x.Key != null);
foreach (var shipmentRewards in groupedByShippingMethodRewards)
{
var bestShipmentReward = GetBestAmountReward(curShipmentAmount, shipmentRewards);
if (bestShipmentReward != null)
{
result.Rewards.Add(bestShipmentReward);
}
}
//best catalog item promotion
var allItemsRewards = rewards.OfType <CatalogItemAmountReward>().ToArray();
var groupRewards = allItemsRewards.GroupBy(x => x.ProductId).Where(x => x.Key != null);
foreach (var groupReward in groupRewards)
{
var item = promoContext.PromoEntries.FirstOrDefault(x => x.ProductId == groupReward.Key);
if (item != null)
{
var bestItemReward = GetBestAmountReward(item.Price, groupReward);
if (bestItemReward != null)
{
result.Rewards.Add(bestItemReward);
}
}
}
//best order promotion
var cartSubtotalRewards = rewards.OfType <CartSubtotalReward>().Where(x => x.IsValid).OrderByDescending(x => x.Amount);
var cartSubtotalReward = cartSubtotalRewards.FirstOrDefault(x => !string.IsNullOrEmpty(x.Coupon)) ?? cartSubtotalRewards.FirstOrDefault();
if (cartSubtotalReward != null)
{
result.Rewards.Add(cartSubtotalReward);
}
//Gifts
rewards.OfType <GiftReward>().ToList().ForEach(x => result.Rewards.Add(x));
//Special offer
rewards.OfType <SpecialOfferReward>().ToList().ForEach(x => result.Rewards.Add(x));
}
return(result);
}