Convert shipping composition handler to contract-less

Author: mauroservienti

ASP.Net Core API Gateway - 01/Composition.Tests/When_calling_composition_gateway.cs

@@ -54,7 +54,7 @@ public async Task Get_composed_product_should_return_expected_values()
                     HttpClient ClientProvider(string name) =>
                         name switch
                         {
-                            var val when val == typeof(Shipping.ViewModelComposition.ProductDetailsGetHandler).FullName => _shippingApiClient,
+                            var val when val == typeof(Shipping.ViewModelComposition.CompositionHandlers.ProductDetailsCompositionHandler).FullName => _shippingApiClient,
                             var val when val == typeof(Warehouse.ViewModelComposition.CompositionHandlers.ProductDetailsCompositionHandler).FullName => _warehouseApiClient,
                             var val when val == typeof(Sales.ViewModelComposition.ProductDetailsGetHandler).FullName => _salesApiClient,
                             var val when val == typeof(Catalog.ViewModelComposition.ProductDetailsGetHandler).FullName => _catalogApiClient,

ASP.Net Core API Gateway - 01/Shipping.ViewModelComposition/CompositionHandlers/ProductDetailsCompositionHandler.cs

@@ -0,0 +1,29 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using JsonUtils;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using ServiceComposer.AspNetCore;
+
+namespace Shipping.ViewModelComposition.CompositionHandlers;
+
+public class ProductDetailsCompositionHandler(HttpClient client, IHttpContextAccessor httpContextAccessor)
+{
+    [HttpGet("/products/details/{id}")]
+    public async Task Get(string id)
+    {
+        var url = $"/api/shipping-options/product/{id}";
+        var response = await client.GetAsync(url);
+
+        dynamic productShippingOptions = await response.Content.AsExpando();
+
+        var options = ((IEnumerable<dynamic>)productShippingOptions.Options)
+            .Select(o => o.Option)
+            .ToArray();
+
+        var vm = httpContextAccessor.HttpContext.Request.GetComposedResponseModel();
+        vm.ProductShippingOptions = string.Join(", ", options);
+    }
+}

ASP.Net Core API Gateway - 01/Shipping.ViewModelComposition/ProductDetailsGetHandler.cs

@@ -3,14 +3,15 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using ServiceComposer.AspNetCore;
+using Shipping.ViewModelComposition.CompositionHandlers;
 
 namespace Shipping.ViewModelComposition
 {
     public class ViewModelCompositionOptionsCustomization : IViewModelCompositionOptionsCustomization
     {
         public void Customize(ViewModelCompositionOptions options)
         {
-            options.RegisterHttpClient<ProductDetailsGetHandler>((serviceProvider, httpClient) =>
+            options.RegisterHttpClient<ProductDetailsCompositionHandler>((serviceProvider, httpClient) =>
             {
                 var configuration = serviceProvider.GetService<IConfiguration>();
                 var baseAddress = configuration?.GetSection("Shipping:BaseAddress").Value ?? "http://localhost:5004";