Fix issue dotnet-architecture#259

Author: PLAINCONCEPTS\lruiz

src/Services/Basket/Basket.API/Infrastructure/Filters/HttpGlobalExceptionFilter.cs

@@ -8,7 +8,7 @@
 
 namespace Basket.API.Infrastructure.Filters
 {
-    public class HttpGlobalExceptionFilter : IExceptionFilter
+    public partial class HttpGlobalExceptionFilter : IExceptionFilter
     {
         private readonly IHostingEnvironment env;
         private readonly ILogger<HttpGlobalExceptionFilter> logger;
@@ -52,12 +52,5 @@ public void OnException(ExceptionContext context)
             }
             context.ExceptionHandled = true;
         }
-
-        private class JsonErrorResponse
-        {
-            public string[] Messages { get; set; }
-
-            public object DeveloperMessage { get; set; }
-        }
     }
 }

src/Services/Basket/Basket.API/Infrastructure/Filters/JsonErrorResponse.cs

@@ -0,0 +1,9 @@
+namespace Basket.API.Infrastructure.Filters
+{
+    public class JsonErrorResponse
+    {
+        public string[] Messages { get; set; }
+
+        public object DeveloperMessage { get; set; }
+    }
+}

src/Services/Basket/Basket.API/Infrastructure/Filters/ValidateModelStateFilter.cs

@@ -0,0 +1,30 @@
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Filters;
+
+namespace Basket.API.Infrastructure.Filters
+{
+    public class ValidateModelStateFilter : ActionFilterAttribute
+    {
+        public override void OnActionExecuting(ActionExecutingContext context)
+        {
+            if (context.ModelState.IsValid)
+            {
+                return;
+            }
+
+            var validationErrors = context.ModelState
+                .Keys
+                .SelectMany(k => context.ModelState[k].Errors)
+                .Select(e => e.ErrorMessage)
+                .ToArray();
+
+            var json = new JsonErrorResponse
+            {
+                Messages = validationErrors
+            };
+
+            context.Result = new BadRequestObjectResult(json);
+        }
+    }
+}

src/Services/Basket/Basket.API/Model/BasketItem.cs

@@ -1,6 +1,9 @@
-namespace Microsoft.eShopOnContainers.Services.Basket.API.Model
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+
+namespace Microsoft.eShopOnContainers.Services.Basket.API.Model
 {
-    public class BasketItem
+    public class BasketItem : IValidatableObject
     {
         public string Id { get; set; }
         public string ProductId { get; set; }
@@ -9,5 +12,16 @@ public class BasketItem
         public decimal OldUnitPrice { get; set; }
         public int Quantity { get; set; }
         public string PictureUrl { get; set; }
+        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
+        {
+            var results = new List<ValidationResult>();
+
+            if (Quantity < 1)
+            {
+                results.Add(new ValidationResult("Invalid number of units", new []{ "Quantity" }));
+            }
+
+            return results;
+        }
     }
 }

src/Services/Basket/Basket.API/Startup.cs

@@ -54,6 +54,7 @@ public IServiceProvider ConfigureServices(IServiceCollection services)
             services.AddMvc(options =>
             {
                 options.Filters.Add(typeof(HttpGlobalExceptionFilter));
+                options.Filters.Add(typeof(ValidateModelStateFilter));
             }).AddControllersAsServices();
 
             services.AddHealthChecks(checks =>

src/Web/WebSPA/Client/modules/basket/basket.component.html

@@ -1,7 +1,13 @@
 <div class="esh-basket">
     <esh-header url="/catalog">Back to catalog</esh-header>
-
+    
     <div class="container">
+        <div *ngFor="let errorMessage of errorMessages">
+            <div class="esh-basket-items-margin-left1 row">
+                <div class="alert alert-warning" role="alert">&nbsp;{{errorMessage}}</div>
+            </div>
+        </div>
+
         <article class="esh-basket-titles row">
             <section class="esh-basket-title col-xs-3">Product</section>
             <section class="esh-basket-title col-xs-3 hidden-lg-down"></section>
@@ -14,7 +20,7 @@
             <article class="esh-basket-items row">
 
                 <section class="esh-basket-item esh-basket-item--middle col-lg-3 hidden-lg-down">
-                    <img class="esh-basket-image" src="{{item.pictureUrl}}" />
+                    <img class="esh-basket-image" src="{{item.pictureUrl}}"/>
                 </section>
                 <section class="esh-basket-item esh-basket-item--middle col-xs-3">{{item.productName}}</section>
                 <section class="esh-basket-item esh-basket-item--middle col-xs-2">$ {{item.unitPrice | number:'.2-2'}}</section>
@@ -23,7 +29,7 @@
                            type="number"
                            min="1"
                            [(ngModel)]="item.quantity"
-                           (change)="itemQuantityChanged(item)" />
+                           (change)="itemQuantityChanged(item)"/>
                 </section>
                 <section class="esh-basket-item esh-basket-item--middle esh-basket-item--mark col-xs-2">$ {{(item.unitPrice * item.quantity) | number:'.2-2'}}</section>
             </article>

src/Web/WebSPA/Client/modules/basket/basket.component.ts

@@ -1,6 +1,10 @@
 import { Component, OnInit }    from '@angular/core';
 import { Router }               from '@angular/router';
 
+import 'rxjs/Rx';
+import { Observable } from 'rxjs/Observable';
+import 'rxjs/add/observable/throw';
+
 import { BasketService }        from './basket.service';
 import { IBasket }              from '../shared/models/basket.model';
 import { IBasketItem }          from '../shared/models/basketItem.model';
@@ -12,6 +16,7 @@ import { BasketWrapperService } from '../shared/services/basket.wrapper.service'
     templateUrl: './basket.component.html'
 })
 export class BasketComponent implements OnInit {
+    errorMessages: any;
     basket: IBasket;
     totalPrice: number = 0;
 
@@ -30,7 +35,10 @@ export class BasketComponent implements OnInit {
     }
 
     update(event: any) {
-        this.service.setBasket(this.basket).subscribe(x => console.log('basket updated: ' + x));
+        this.service.setBasket(this.basket).catch((errMessage) => {
+            this.errorMessages = errMessage.messages;
+            return Observable.throw(errMessage);
+        }).subscribe(x => console.log('basket updated: ' + x));
     }
 
     checkOut(event: any) {

src/Web/WebSPA/Client/modules/orders/orders.component.ts

@@ -20,7 +20,7 @@ export class OrdersComponent implements OnInit {
 
     ngOnInit() {
         if (this.configurationService.isReady) {
-            this.getOrders()
+            this.getOrders();
         } else {
             this.configurationService.settingsLoaded$.subscribe(x => {
                 this.getOrders();
@@ -31,7 +31,7 @@ export class OrdersComponent implements OnInit {
         this.interval = setTimeout(() => {
             this.service.getOrders().subscribe(orders => {
                 this.orders = orders;
-                if (this.orders.length != this.oldOrders.length) {
+                if (this.orders.length !== this.oldOrders.length) {
                     clearInterval(this.interval);
                 }
             });

src/Web/WebSPA/Client/modules/shared/services/data.service.ts

@@ -102,7 +102,7 @@ export class DataService {
         if (error instanceof Response) {
             let errMessage = '';
             try {
-                errMessage = error.json().error;
+                errMessage = error.json();
             } catch (err) {
                 errMessage = error.statusText;
             }