Docs for Promotions module and sample app improvements

docs/README.md

@@ -105,12 +105,13 @@ We can customize the EShop for complex application scenarios.
 
 * Plugin modules
   * [Baskets](https://github.com/EasyAbp/EShop/tree/dev/plugins/Baskets)
+  * [Booking](https://github.com/EasyAbp/EShop/tree/dev/plugins/Booking)
   * Coupons
+  * [FlashSales](https://github.com/EasyAbp/EShop/tree/dev/plugins/FlashSales)
   * Inventories
     * [DaprActors](https://github.com/EasyAbp/EShop/tree/dev/plugins/Inventories/DaprActors)
     * [OrleansGrains](https://github.com/EasyAbp/EShop/tree/dev/plugins/Inventories/OrleansGrains)
-  * [FlashSales](https://github.com/EasyAbp/EShop/tree/dev/plugins/FlashSales)
-  * [Booking](https://github.com/EasyAbp/EShop/tree/dev/plugins/Booking)
+  * [Promotions](https://github.com/EasyAbp/EShop/tree/dev/plugins/Promotions)
 
 ## Roadmap
 

docs/plugins/promotions/README.md

@@ -0,0 +1,88 @@
+# EShop.Plugins.Promotions
+
+[![ABP version](https://img.shields.io/badge/dynamic/xml?style=flat-square&color=yellow&label=abp&query=%2F%2FProject%2FPropertyGroup%2FAbpVersion&url=https%3A%2F%2Fraw.githubusercontent.com%2FEasyAbp%2FEShop%2Fmaster%2FDirectory.Build.props)](https://abp.io)
+[![NuGet](https://img.shields.io/nuget/v/EasyAbp.EShop.Plugins.Promotions.Domain.Shared.svg?style=flat-square)](https://www.nuget.org/packages/EasyAbp.EShop.Plugins.Promotions.Domain.Shared)
+[![NuGet Download](https://img.shields.io/nuget/dt/EasyAbp.EShop.Plugins.Promotions.Domain.Shared.svg?style=flat-square)](https://www.nuget.org/packages/EasyAbp.EShop.Plugins.Promotions.Domain.Shared)
+[![Discord online](https://badgen.net/discord/online-members/xyg8TrRa27?label=Discord)](https://discord.gg/xyg8TrRa27)
+[![GitHub stars](https://img.shields.io/github/stars/EasyAbp/EShop?style=social)](https://www.github.com/EasyAbp/EShop)
+
+A promotion discount provider plugin for EShop.
+
+## Installation
+
+1. Install the following NuGet packages. ([see how](https://github.com/EasyAbp/EasyAbpGuide/blob/master/docs/How-To.md#add-nuget-packages))
+
+   - EasyAbp.EShop.Orders.Plugins.Promotions.Domain (install at EasyAbp.EShop.Orders.Domain location)
+   - EasyAbp.EShop.Products.Plugins.Promotions.Domain (install at EasyAbp.EShop.Products.Domain location)
+   - EasyAbp.EShop.Plugins.Promotions.Application
+   - EasyAbp.EShop.Plugins.Promotions.Application.Contracts
+   - EasyAbp.EShop.Plugins.Promotions.Domain
+   - EasyAbp.EShop.Plugins.Promotions.Domain.Shared
+   - EasyAbp.EShop.Plugins.Promotions.EntityFrameworkCore
+   - EasyAbp.EShop.Plugins.Promotions.HttpApi
+   - EasyAbp.EShop.Plugins.Promotions.HttpApi.Client
+   - (Optional) EasyAbp.EShop.Plugins.Promotions.MongoDB
+   - (Optional) EasyAbp.EShop.Plugins.Promotions.Web
+
+2. Add `DependsOn(typeof(EShopXxxModule))` attribute to configure the module dependencies. ([see how](https://github.com/EasyAbp/EasyAbpGuide/blob/master/docs/How-To.md#add-module-dependencies))
+
+3. Add `builder.ConfigureEShopPluginsPromotions();` to the `OnModelCreating()` method in **MyProjectDbContext.cs**.
+
+4. Add EF Core migrations and update your database. See: [ABP document](https://docs.abp.io/en/abp/latest/Tutorials/Part-1?UI=MVC&DB=EF#add-database-migration).
+
+## Concepts
+
+This promotion plugin module provides an easy way to define EShop's product discounts and order discounts.
+
+### Promotion Type
+
+Promotion type is defined to provide programs for different discount logics.
+
+We have created [SimpleProductDiscount](https://github.com/EasyAbp/EShop/tree/dev/plugins/Promotions/src/EasyAbp.EShop.Plugins.Promotions.Domain/EasyAbp/EShop/Plugins/Promotions/PromotionTypes/SimpleProductDiscount) and [MinQuantityOrderDiscount](https://github.com/EasyAbp/EShop/tree/dev/plugins/Promotions/src/EasyAbp.EShop.Plugins.Promotions.Domain/EasyAbp/EShop/Plugins/Promotions/PromotionTypes/MinQuantityOrderDiscount) promotion type definitions for you.
+You can define custom promotion types yourself if you need different discount logic.
+
+### Product Discount
+
+Product discounts subtract the price of products before customers place an order.
+
+For a product SKU, if there are more than one promotion offering product discounts, customers will see all of them,
+but only the one with the highest discount amount will be applied,
+since they have the same `EffectGroup = "Promotion"`.
+
+The promotion product discounts coexist with other types of discounts with different EffectGroup.
+
+### Order Discount
+
+Order discounts subtract the price of products after customers place an order.
+
+For an order line, if there are more than one promotion offering order discounts,
+only the one with the highest discount amount will be applied,
+since they have the same `EffectGroup = "Promotion"`.
+
+The promotion order discounts coexist with other types of discounts with different EffectGroup.
+
+### The Best Combination of Discounts
+
+The [Orders](https://github.com/EasyAbp/EShop/tree/dev/modules/EasyAbp.EShop.Orders) module of EShop will search the best combination of discounts using BFS.
+
+See these codes for more:
+
+* [ProductDiscountResolver](https://github.com/EasyAbp/EShop/blob/dev/modules/EasyAbp.EShop.Products/src/EasyAbp.EShop.Products.Domain/EasyAbp/EShop/Products/Products/ProductDiscountResolver.cs)
+* [OrderDiscountResolver](https://github.com/EasyAbp/EShop/blob/dev/modules/EasyAbp.EShop.Orders/src/EasyAbp.EShop.Orders.Domain/EasyAbp/EShop/Orders/Orders/OrderDiscountResolver.cs)
+* [DemoOrderDiscountProvider](https://github.com/EasyAbp/EShop/blob/dev/modules/EasyAbp.EShop.Orders/test/EasyAbp.EShop.Orders.Domain.Tests/Orders/DemoOrderDiscountProvider.cs) and [OrderDiscountProviderTests](https://github.com/EasyAbp/EShop/blob/dev/modules/EasyAbp.EShop.Orders/test/EasyAbp.EShop.Orders.Domain.Tests/Orders/OrderDiscountProviderTests.cs)
+
+## Usage
+
+### Create a Promotion for Product Discounts
+
+You can create a promotion with the preset promotion type [SimpleProductDiscount](https://github.com/EasyAbp/EShop/tree/dev/plugins/Promotions/src/EasyAbp.EShop.Plugins.Promotions.Domain/EasyAbp/EShop/Plugins/Promotions/PromotionTypes/SimpleProductDiscount).
+It offers direct product discounts for the products you specify.
+
+![SimpleProductDiscount](/docs/plugins/promotions/images/SimpleProductDiscount.apng)
+
+### Create a Promotion for Order Discounts
+
+You can create a promotion with the preset promotion type [SimpleProductDiscount](https://github.com/EasyAbp/EShop/tree/dev/plugins/Promotions/src/EasyAbp.EShop.Plugins.Promotions.Domain/EasyAbp/EShop/Plugins/Promotions/PromotionTypes/SimpleProductDiscount).
+It discounts an order line if the `OrderLine.Quantity >= Configurations.MinQuantity`.
+
+![MinQuantityOrderDiscount](/docs/plugins/promotions/images/MinQuantityOrderDiscount.apng)

plugins/Promotions/README.md

@@ -0,0 +1 @@
+../../docs/plugins/promotions/README.md

samples/EShopSample/aspnet-core/src/EShopSample.Domain.Shared/Localization/EShopSample/en.json

@@ -8,7 +8,8 @@
     "Product": "Product",
     "Cake": "Cake",
     "OrderCake": "Order a cake",
-    "CreateOrder": "Create order",
+    "Buy-1-PCS": "Buy 1 PCS",
+    "Buy-2-PCS": "Buy 2 PCS",
     "PayForOrder": "Pay for order",
     "TopUp-1-USD": "Top-up 1.00 USD",
     "OrderHistory": "Order history",
@@ -30,6 +31,7 @@
     "OrderStatusProcessing": "Processing",
     "OrderStatusCompleted": "Completed",
     "OrderStatusCanceled": "Canceled",
+    "Quantity": "Quantity",
     "TotalPrice": "Price",
     "AccountBalance": "Account balance",
     "TimeToAutoCancel": "Order auto-cancel in",

samples/EShopSample/aspnet-core/src/EShopSample.Domain.Shared/Localization/EShopSample/zh-Hans.json

@@ -8,7 +8,8 @@
     "Product": "商品",
     "Cake": "蛋糕",
     "OrderCake": "下单买蛋糕",
-    "CreateOrder": "创建订单",
+    "Buy-1-PCS": "购买 1 份",
+    "Buy-2-PCS": "购买 2 份",
     "PayForOrder": "支付订单",
     "TopUp-1-USD": "充值 1.00 美元",
     "OrderHistory": "历史订单",
@@ -30,6 +31,7 @@
     "OrderStatusProcessing": "进行中",
     "OrderStatusCompleted": "已完成",
     "OrderStatusCanceled": "已取消",
+    "Quantity": "数量",
     "TotalPrice": "价格",
     "AccountBalance": "账户余额",
     "TimeToAutoCancel": "剩余可支付时间",

samples/EShopSample/aspnet-core/src/EShopSample.Domain.Shared/Localization/EShopSample/zh-Hant.json

@@ -8,7 +8,8 @@
     "Product": "商品",
     "Cake": "蛋糕",
     "OrderCake": "下單買蛋糕",
-    "CreateOrder": "創建訂單",
+    "Buy-1-PCS": "購買 1 份",
+    "Buy-2-PCS": "購買 2 份",
     "PayForOrder": "支付訂單",
     "TopUp-1-USD": "充值 1.00 美元",
     "OrderHistory": "歷史訂單",
@@ -30,6 +31,7 @@
     "OrderStatusProcessing": "進行中",
     "OrderStatusCompleted": "已完成",
     "OrderStatusCanceled": "已取消",
+    "Quantity": "數量",
     "TotalPrice": "價格",
     "AccountBalance": "賬戶餘額",
     "TimeToAutoCancel": "剩餘可支付時間",

samples/EShopSample/aspnet-core/src/EShopSample.Web/Pages/Index.cshtml

@@ -62,7 +62,8 @@ let secondsToAutoCancel = @Model.GetSecondsToAutoCancel()
                         <div id="selectedSkuId" class="my-1"></div>
                         <div id="selectedSkuPrice" class="my-1"></div>
                         <hr>
-                        <abp-button id="CreateOrderButton" button-type="Primary">@L["CreateOrder"]</abp-button>
+                        <abp-button id="Buy1PcsButton" button-type="Primary">@L["Buy-1-PCS"]</abp-button>
+                        <abp-button id="Buy2PcsButton" button-type="Primary">@L["Buy-2-PCS"]</abp-button>
                     </abp-tab>
                     <abp-tab name="PayForOrderTab" title="@L["PayForOrder"].Value" active="@(Model.Order?.OrderStatus is OrderStatus.Pending)">
                         @if (Model.Order is not null)
@@ -86,6 +87,10 @@ let secondsToAutoCancel = @Model.GetSecondsToAutoCancel()
                                         <td>@L[option.DisplayName]</td>
                                     </tr>
                                 }
+                                <tr>
+                                    <td>@L["Quantity"]</td>
+                                    <td>@Model.Order.OrderLines[0].Quantity</td>
+                                </tr>
                                 <tr>
                                     <td>@L["TotalPrice"]</td>
                                     <td>@Model.Order.ActualTotalPrice.ToString("F2") @Model.Order.Currency</td>

samples/EShopSample/aspnet-core/src/EShopSample.Web/Pages/Index.js

@@ -5,11 +5,13 @@
     const paymentService = easyAbp.paymentService.payments.payment;
     const accountService = easyAbp.paymentService.prepayment.accounts.account;
 
-    $('#CreateOrderButton').click(function (e) {
+    $('#Buy1PcsButton').click(function (e) {
         e.preventDefault();
         if (!cakeProductSkuId) return
-        let btn = $(this)
-        btn.buttonBusy(true);
+        let btn1 = $('Buy1PcsButton')
+        btn1.buttonBusy(true);
+        let btn2 = $('Buy2PcsButton')
+        btn2.buttonBusy(true);
         orderService.create({
             storeId: storeId,
             orderLines: [{
@@ -23,7 +25,34 @@
                     window.location.reload();
                 })
         }).catch(function () {
-            btn.buttonBusy(false);
+            btn1.buttonBusy(false);
+            btn2.buttonBusy(false);
+        });
+    });
+
+
+    $('#Buy2PcsButton').click(function (e) {
+        e.preventDefault();
+        if (!cakeProductSkuId) return
+        let btn1 = $('Buy1PcsButton')
+        btn1.buttonBusy(true);
+        let btn2 = $('Buy2PcsButton')
+        btn2.buttonBusy(true);
+        orderService.create({
+            storeId: storeId,
+            orderLines: [{
+                productId: cakeProductId,
+                productSkuId: cakeProductSkuId,
+                quantity: 2
+            }]
+        }).then(function () {
+            abp.message.success(l('OrderCreated'))
+                .then(function () {
+                    window.location.reload();
+                })
+        }).catch(function () {
+            btn1.buttonBusy(false);
+            btn2.buttonBusy(false);
         });
     });