Refactor WebAPi app

Author: ethanhann

IntegrationEngine/Api/IWebApiApplication.cs

@@ -0,0 +1,13 @@
+using IntegrationEngine.Configuration;
+using System;
+
+namespace IntegrationEngine.Api
+{
+    public interface IWebApiApplication
+    {
+        IDisposable webApi { get; set; }
+        WebApiConfiguration WebApiConfiguration { get; set; }
+        void Start();
+        void Stop();
+    }
+}

IntegrationEngine/Api/WebApiApplication.cs

@@ -0,0 +1,26 @@
+using IntegrationEngine.Configuration;
+using Microsoft.Owin.Hosting;
+using System;
+
+namespace IntegrationEngine.Api
+{
+    public class WebApiApplication : IWebApiApplication
+    {
+        public IDisposable webApi { get; set; }
+        public WebApiConfiguration WebApiConfiguration { get; set; }
+
+        public WebApiApplication()
+        { }
+
+        public void Start()
+        {
+            var baseAddress = (new UriBuilder("http", WebApiConfiguration.HostName, WebApiConfiguration.Port)).Uri.AbsoluteUri;
+            webApi = WebApp.Start<WebApiStartup>(baseAddress);
+        }
+
+        public void Stop()
+        {
+            webApi.Dispose();
+        }
+    }
+}

IntegrationEngine/Api/WebApiStartup.cs

@@ -0,0 +1,32 @@
+using Microsoft.Owin;
+using Owin;
+using System.Linq;
+using System.Web.Http;
+using System.Web.Http.Cors;
+using Microsoft.Practices.Unity;
+using IntegrationEngine.Configuration;
+
+[assembly: OwinStartup(typeof(IntegrationEngine.Api.WebApiStartup))]
+
+namespace IntegrationEngine.Api
+{
+    public class WebApiStartup
+    {
+        public void Configuration(IAppBuilder appBuilder)
+        {
+            var  config = new HttpConfiguration();
+            var container = ContainerSingleton.GetContainer();
+            config.DependencyResolver = new ContainerResolver(container);
+            var webApiConfig = container.Resolve<EngineConfiguration>().WebApi;
+            if (webApiConfig.Origins.Any())
+                config.EnableCors(new EnableCorsAttribute(string.Join(",", webApiConfig.Origins), "*", "*"));
+            config.Routes.MapHttpRoute(
+                name: "DefaultApi",
+                routeTemplate: "api/{controller}/{id}",
+                defaults: new { id = RouteParameter.Optional }
+            );
+            config.MapHttpAttributeRoutes();
+            appBuilder.UseWebApi(config);
+        }
+    }
+}