mirror of https://github.com/EasyAbp/EShop.git
Super
3 years ago
committed by
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GitHub
49 changed files with 7143 additions and 382 deletions
@ -0,0 +1,56 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using EasyAbp.EShop.Products.Products; |
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|
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namespace EasyAbp.EShop.Orders.Orders; |
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|
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public class OrderDiscountContext |
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{ |
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public IOrder Order { get; } |
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public Dictionary<Guid, IProduct> ProductDict { get; } |
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public List<OrderDiscountInfoModel> CandidateDiscounts { get; } |
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public OrderDiscountContext(IOrder order, Dictionary<Guid, IProduct> productDict) |
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{ |
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Order = order; |
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ProductDict = productDict ?? new Dictionary<Guid, IProduct>(); |
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} |
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public List<OrderDiscountInfoModel> GetEffectDiscounts() |
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{ |
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var effectDiscounts = new List<OrderDiscountInfoModel>(); |
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foreach (var discount in CandidateDiscounts.Where(x => x.EffectGroup.IsNullOrEmpty())) |
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{ |
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effectDiscounts.Add(discount); |
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} |
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// Make sure that each OrderLine can only be affected by one discount with the same EffectGroup.
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var affectedOrderLineIdsInEffectGroup = new Dictionary<string, List<Guid>>(); |
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foreach (var grouping in CandidateDiscounts.Where(x => !x.EffectGroup.IsNullOrEmpty()) |
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.GroupBy(x => x.EffectGroup)) |
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{ |
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var effectGroup = grouping.Key; |
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affectedOrderLineIdsInEffectGroup[effectGroup] = new List<Guid>(); |
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// todo: can be improved to find the best discount combo.
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foreach (var discount in grouping) |
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{ |
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if (discount.AffectedOrderLineIds.Any(x => affectedOrderLineIdsInEffectGroup[effectGroup].Contains(x))) |
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{ |
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continue; |
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} |
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affectedOrderLineIdsInEffectGroup[effectGroup].AddRange(discount.AffectedOrderLineIds); |
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effectDiscounts.Add(discount); |
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} |
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} |
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return effectDiscounts; |
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} |
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} |
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@ -1,12 +1,11 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Threading.Tasks; |
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using EasyAbp.EShop.Products.Products; |
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using System.Threading.Tasks; |
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|
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namespace EasyAbp.EShop.Orders.Orders |
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{ |
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public interface IOrderDiscountProvider |
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{ |
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Task<List<OrderDiscountInfoModel>> GetAllAsync(Order order, Dictionary<Guid, IProduct> productDict); |
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int EffectOrder { get; } |
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Task DiscountAsync(OrderDiscountContext context); |
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} |
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} |
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@ -0,0 +1,146 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using JetBrains.Annotations; |
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|
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namespace EasyAbp.EShop.Products.Products; |
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|
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public static class HasDiscountsForProductExtensions |
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{ |
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public static void FillEffectState(this IHasDiscountsForProduct hasDiscountsForProduct, DateTime now) |
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{ |
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var effectGroupsBestModel = new Dictionary<string, ProductDiscountInfoModel>(); |
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foreach (var model in hasDiscountsForProduct.ProductDiscounts.Where(model => |
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(!model.FromTime.HasValue || model.FromTime <= now) && |
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(!model.ToTime.HasValue || model.ToTime >= now))) |
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{ |
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if (model.EffectGroup.IsNullOrEmpty()) |
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{ |
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model.InEffect = true; |
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} |
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else |
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{ |
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effectGroupsBestModel.TryGetValue(model.EffectGroup!, out var existing); |
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if (existing is null) |
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{ |
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model.InEffect = true; |
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effectGroupsBestModel[model.EffectGroup] = model; |
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} |
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else if (effectGroupsBestModel[model.EffectGroup].DiscountedAmount < model.DiscountedAmount) |
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{ |
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effectGroupsBestModel[model.EffectGroup].InEffect = false; |
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model.InEffect = true; |
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effectGroupsBestModel[model.EffectGroup] = model; |
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} |
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} |
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} |
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} |
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/// <summary>
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/// It returns a sum of the amount of the product discounts currently in effect.
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/// </summary>
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public static decimal GetDiscountedAmount(this IHasDiscountsForProduct hasDiscountsForProduct) |
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{ |
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return hasDiscountsForProduct.ProductDiscounts.Where(x => x.InEffect == true).Sum(x => x.DiscountedAmount); |
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} |
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/// <summary>
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/// It returns the price minus the product discounts currently in effect.
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/// </summary>
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public static decimal GetDiscountedPrice(this IHasFullDiscountsForProduct hasFullDiscountsForProduct) |
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{ |
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return hasFullDiscountsForProduct.PriceWithoutDiscount - hasFullDiscountsForProduct.GetDiscountedAmount(); |
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} |
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public static ProductDiscountInfoModel FindProductDiscount(this IHasDiscountsForProduct hasDiscountsForProduct, |
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[NotNull] string name, [CanBeNull] string key) |
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{ |
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return hasDiscountsForProduct.ProductDiscounts.Find(x => x.Name == name && x.Key == key); |
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} |
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public static void AddOrUpdateProductDiscount(this IHasDiscountsForProduct hasDiscountsForProduct, |
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ProductDiscountInfoModel model) |
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{ |
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var found = hasDiscountsForProduct.FindProductDiscount(model.Name, model.Key); |
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if (found is null) |
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{ |
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hasDiscountsForProduct.ProductDiscounts.Add(model); |
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} |
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else |
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{ |
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hasDiscountsForProduct.ProductDiscounts.ReplaceOne(found, model); |
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} |
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hasDiscountsForProduct.CheckDiscountedAmount(); |
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} |
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public static bool TryRemoveProductDiscount(this IHasDiscountsForProduct hasDiscountsForProduct, |
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[NotNull] string name, |
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[CanBeNull] string key) |
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{ |
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var found = hasDiscountsForProduct.FindProductDiscount(name, key); |
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if (found is null) |
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{ |
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return false; |
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} |
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hasDiscountsForProduct.ProductDiscounts.Remove(found); |
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hasDiscountsForProduct.CheckDiscountedAmount(); |
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return true; |
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} |
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public static OrderDiscountPreviewInfoModel FindOrderDiscountPreview( |
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this IHasDiscountsForProduct hasDiscountsForProduct, [NotNull] string name, [CanBeNull] string key) |
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{ |
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return hasDiscountsForProduct.OrderDiscountPreviews.Find(x => x.Name == name && x.Key == key); |
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} |
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public static void AddOrUpdateOrderDiscountPreview(this IHasDiscountsForProduct hasDiscountsForProduct, |
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OrderDiscountPreviewInfoModel model) |
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{ |
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var found = hasDiscountsForProduct.FindOrderDiscountPreview(model.Name, model.Key); |
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if (found is null) |
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{ |
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hasDiscountsForProduct.OrderDiscountPreviews.Add(model); |
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} |
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else |
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{ |
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hasDiscountsForProduct.OrderDiscountPreviews.ReplaceOne(found, model); |
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} |
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hasDiscountsForProduct.CheckDiscountedAmount(); |
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} |
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public static bool TryRemoveOrderDiscountPreview(this IHasDiscountsForProduct hasDiscountsForProduct, |
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[NotNull] string name, |
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[CanBeNull] string key) |
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{ |
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var found = hasDiscountsForProduct.FindOrderDiscountPreview(name, key); |
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if (found is null) |
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{ |
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return false; |
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} |
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hasDiscountsForProduct.OrderDiscountPreviews.Remove(found); |
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hasDiscountsForProduct.CheckDiscountedAmount(); |
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return true; |
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} |
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private static void CheckDiscountedAmount(this IHasDiscountsForProduct hasDiscountsForProduct) |
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{ |
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if (hasDiscountsForProduct.ProductDiscounts.Any(x => x.DiscountedAmount < decimal.Zero)) |
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{ |
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throw new DiscountAmountOverflowException(); |
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} |
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} |
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} |
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@ -1,108 +0,0 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using JetBrains.Annotations; |
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namespace EasyAbp.EShop.Products.Products; |
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public static class HasDiscountsInfoExtensions |
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{ |
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public static decimal GetProductDiscountsDiscountedAmount(this IHasDiscountsInfo hasDiscountsInfo, DateTime now) |
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{ |
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return hasDiscountsInfo.ProductDiscounts |
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.Where(x => !x.FromTime.HasValue || x.FromTime <= now) |
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.Where(x => !x.ToTime.HasValue || now <= x.ToTime) |
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.Sum(x => x.DiscountedAmount); |
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} |
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public static void AddOrUpdateProductDiscount(this IHasDiscountsInfo hasDiscountsInfo, |
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ProductDiscountInfoModel model) |
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{ |
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var found = hasDiscountsInfo.FindProductDiscount(model.Name, model.Key); |
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if (found is null) |
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{ |
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hasDiscountsInfo.ProductDiscounts.Add(model); |
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} |
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else |
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{ |
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hasDiscountsInfo.ProductDiscounts.ReplaceOne(found, model); |
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} |
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hasDiscountsInfo.CheckDiscountedAmount(); |
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} |
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public static ProductDiscountInfoModel FindProductDiscount(this IHasDiscountsInfo hasDiscountsInfo, |
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[NotNull] string name, [CanBeNull] string key) |
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{ |
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return hasDiscountsInfo.ProductDiscounts.Find(x => x.Name == name && x.Key == key); |
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} |
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public static bool TryRemoveProductDiscount(this IHasDiscountsInfo hasDiscountsInfo, [NotNull] string name, |
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[CanBeNull] string key) |
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{ |
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var found = hasDiscountsInfo.FindProductDiscount(name, key); |
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if (found is null) |
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{ |
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return false; |
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} |
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hasDiscountsInfo.ProductDiscounts.Remove(found); |
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hasDiscountsInfo.CheckDiscountedAmount(); |
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return true; |
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} |
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public static void AddOrUpdateOrderDiscountPreview(this IHasDiscountsInfo hasDiscountsInfo, |
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OrderDiscountPreviewInfoModel model) |
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{ |
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var found = hasDiscountsInfo.FindOrderDiscount(model.Name, model.Key); |
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if (found is null) |
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{ |
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hasDiscountsInfo.OrderDiscountPreviews.Add(model); |
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} |
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else |
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{ |
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hasDiscountsInfo.OrderDiscountPreviews.ReplaceOne(found, model); |
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} |
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hasDiscountsInfo.CheckDiscountedAmount(); |
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} |
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public static OrderDiscountPreviewInfoModel FindOrderDiscount(this IHasDiscountsInfo hasDiscountsInfo, |
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[NotNull] string name, [CanBeNull] string key) |
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{ |
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return hasDiscountsInfo.OrderDiscountPreviews.Find(x => x.Name == name && x.Key == key); |
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} |
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public static bool TryRemoveOrderDiscountPreview(this IHasDiscountsInfo hasDiscountsInfo, [NotNull] string name, |
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[CanBeNull] string key) |
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{ |
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var found = hasDiscountsInfo.FindOrderDiscount(name, key); |
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if (found is null) |
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{ |
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return false; |
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} |
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hasDiscountsInfo.OrderDiscountPreviews.Remove(found); |
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hasDiscountsInfo.CheckDiscountedAmount(); |
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return true; |
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} |
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private static void CheckDiscountedAmount(this IHasDiscountsInfo hasDiscountsInfo) |
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{ |
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if (hasDiscountsInfo.ProductDiscounts.Any(x => x.DiscountedAmount < decimal.Zero) || |
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hasDiscountsInfo.OrderDiscountPreviews.Any(x => |
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x.MinDiscountedAmount < decimal.Zero || x.MaxDiscountedAmount < decimal.Zero || |
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x.MinDiscountedAmount > x.MaxDiscountedAmount)) |
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{ |
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throw new DiscountAmountOverflowException(); |
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} |
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} |
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} |
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@ -0,0 +1,23 @@ |
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using JetBrains.Annotations; |
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namespace EasyAbp.EShop.Products.Products; |
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public interface IDiscountInfo |
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{ |
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/// <summary>
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/// If you set this value, only one Discount in the same EffectGroup will be applied.
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/// For OrderDiscounts, each OrderLine can only be affected by one discount with the same EffectGroup.
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/// For ProductDiscounts, the Discount with the highest discounted amount will be applied.
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/// </summary>
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[CanBeNull] |
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string EffectGroup { get; } |
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[NotNull] |
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string Name { get; } |
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[CanBeNull] |
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string Key { get; } |
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[CanBeNull] |
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string DisplayName { get; } |
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} |
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@ -1,6 +1,6 @@ |
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namespace EasyAbp.EShop.Products.Products; |
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public interface IHasFullDiscountsInfo : IHasDiscountsInfo |
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public interface IHasFullDiscountsForProduct : IHasDiscountsForProduct |
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{ |
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/// <summary>
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/// The realtime price without subtracting the discount amount.
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@ -0,0 +1,91 @@ |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using JetBrains.Annotations; |
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namespace EasyAbp.EShop.Products.Products; |
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public class ProductDiscountContext |
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{ |
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public DateTime Now { get; } |
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public IProduct Product { get; } |
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public IProductSku ProductSku { get; } |
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public decimal PriceWithoutDiscount => PriceModel.PriceWithoutDiscount; |
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public IReadOnlyList<ProductDiscountInfoModel> ProductDiscounts => PriceModel.ProductDiscounts; |
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public IReadOnlyList<OrderDiscountPreviewInfoModel> OrderDiscountPreviews => PriceModel.OrderDiscountPreviews; |
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private ProductPriceModel PriceModel { get; } |
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public ProductDiscountContext(IProduct product, IProductSku productSku, decimal priceFromPriceProvider, |
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DateTime now) |
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{ |
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Product = product; |
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ProductSku = productSku; |
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PriceModel = new ProductPriceModel(priceFromPriceProvider); |
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Now = now; |
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} |
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public ProductDiscountInfoModel FindProductDiscount([NotNull] string name, [CanBeNull] string key) |
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{ |
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return PriceModel.FindProductDiscount(name, key); |
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} |
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public void AddOrUpdateProductDiscount(ProductDiscountInfoModel model) |
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{ |
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PriceModel.AddOrUpdateProductDiscount(model); |
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PriceModel.FillEffectState(Now); |
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} |
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public bool TryRemoveProductDiscount([NotNull] string name, [CanBeNull] string key) |
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{ |
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var result = PriceModel.TryRemoveProductDiscount(name, key); |
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PriceModel.FillEffectState(Now); |
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return result; |
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} |
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public OrderDiscountPreviewInfoModel FindOrderDiscountPreview([NotNull] string name, [CanBeNull] string key) |
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{ |
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return PriceModel.FindOrderDiscountPreview(name, key); |
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} |
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public void AddOrUpdateOrderDiscountPreview(OrderDiscountPreviewInfoModel model) |
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{ |
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PriceModel.AddOrUpdateOrderDiscountPreview(model); |
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} |
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public bool TryRemoveOrderDiscountPreview([NotNull] string name, [CanBeNull] string key) |
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{ |
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return PriceModel.TryRemoveOrderDiscountPreview(name, key); |
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} |
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/// <summary>
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/// It returns a sum of the amount of the product discounts currently in effect.
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/// </summary>
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public decimal GetDiscountedAmount(string excludingEffectGroup = null) |
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{ |
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return PriceModel.ProductDiscounts |
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.Where(x => x.InEffect == true) |
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.WhereIf(excludingEffectGroup != null, x => x.EffectGroup != excludingEffectGroup) |
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.Sum(x => x.DiscountedAmount); |
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} |
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/// <summary>
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/// It returns the price minus the product discounts currently in effect.
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/// </summary>
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public decimal GetDiscountedPrice(string excludingEffectGroup = null) |
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{ |
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return PriceWithoutDiscount - GetDiscountedAmount(excludingEffectGroup); |
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} |
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public ProductPriceModel ToFinalProductPriceModel() |
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{ |
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return PriceModel; |
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} |
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} |
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@ -0,0 +1,23 @@ |
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using System; |
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using System.Collections.Generic; |
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namespace EasyAbp.EShop.Products.Products; |
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public class ProductPriceModel : IHasFullDiscountsForProduct |
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{ |
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public decimal PriceWithoutDiscount { get; } |
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public List<ProductDiscountInfoModel> ProductDiscounts { get; } = new(); |
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public List<OrderDiscountPreviewInfoModel> OrderDiscountPreviews { get; } = new(); |
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public ProductPriceModel(decimal priceWithoutDiscount) |
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{ |
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if (PriceWithoutDiscount < decimal.Zero) |
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{ |
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throw new OverflowException(); |
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} |
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PriceWithoutDiscount = priceWithoutDiscount; |
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} |
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} |
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@ -1,36 +0,0 @@ |
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using System; |
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using System.Collections.Generic; |
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namespace EasyAbp.EShop.Products.Products; |
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|
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public class PriceDataModel : IHasFullDiscountsInfo |
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{ |
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public DateTime Now { get; } |
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public decimal PriceWithoutDiscount { get; } |
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/// <summary>
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/// It's a sum of the amount of product discounts which in effect at the current time (this.<see cref="Now"/>).
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/// </summary>
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public decimal DiscountedAmount => this.GetProductDiscountsDiscountedAmount(Now); |
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/// <summary>
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/// It has been subtracted from the product discounts which in effect at the current time (this.<see cref="Now"/>).
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/// </summary>
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public decimal DiscountedPrice => PriceWithoutDiscount - DiscountedAmount; |
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public List<ProductDiscountInfoModel> ProductDiscounts { get; } = new(); |
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|
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public List<OrderDiscountPreviewInfoModel> OrderDiscountPreviews { get; } = new(); |
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public PriceDataModel(decimal priceWithoutDiscount, DateTime now) |
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{ |
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if (PriceWithoutDiscount < decimal.Zero) |
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{ |
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throw new OverflowException(); |
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} |
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|
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Now = now; |
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PriceWithoutDiscount = priceWithoutDiscount; |
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} |
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} |
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@ -1,19 +0,0 @@ |
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using System; |
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|
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namespace EasyAbp.EShop.Products.Products; |
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|
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public class ProductDiscountContext |
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{ |
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public Product Product { get; } |
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|
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public ProductSku ProductSku { get; } |
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|
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public PriceDataModel PriceDataModel { get; } |
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|
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public ProductDiscountContext(Product product, ProductSku productSku, decimal priceFromPriceProvider, DateTime now) |
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{ |
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Product = product; |
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ProductSku = productSku; |
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PriceDataModel = new PriceDataModel(priceFromPriceProvider, now); |
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} |
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} |
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File diff suppressed because it is too large
@ -0,0 +1,28 @@ |
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using Microsoft.EntityFrameworkCore.Migrations; |
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#nullable disable |
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|
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namespace EShopSample.Migrations |
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{ |
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/// <inheritdoc />
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public partial class AddedEffectGroup : Migration |
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{ |
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/// <inheritdoc />
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protected override void Up(MigrationBuilder migrationBuilder) |
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{ |
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migrationBuilder.AddColumn<string>( |
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name: "EffectGroup", |
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table: "EasyAbpEShopOrdersOrderDiscounts", |
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type: "nvarchar(max)", |
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nullable: true); |
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} |
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|
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/// <inheritdoc />
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protected override void Down(MigrationBuilder migrationBuilder) |
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{ |
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migrationBuilder.DropColumn( |
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name: "EffectGroup", |
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table: "EasyAbpEShopOrdersOrderDiscounts"); |
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} |
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} |
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} |
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