Introduced MapDefaultAreaControllerRoute() extension method

The `MapDefaultAreaControllerRoute()` is analogous to the out-of-the-box `MapDefaultControllerRoute()` extension that ships with ASP.NET Core—except that it _also_ supports routes. This isn't _specific_ to OnTopic, but it's useful, in particular, for supporting explicit `{area}/{controller}/{action}/{id?}` style routes. This automatically registers _all_ areas to support this route.

Author: JeremyCaney

OnTopic.AspNetCore.Mvc/ServiceCollectionExtensions.cs

@@ -127,6 +127,22 @@ public static ControllerActionEndpointConventionBuilder MapTopicAreaRoute(
         defaults: new { controller = controller?? areaName, action, rootTopic = areaName }
       );
 
+    /*==========================================================================================================================
+    | EXTENSION: MAP DEFAULT AREA CONTROLLER ROUTES (IENDPOINTROUTEBUILDER)
+    \-------------------------------------------------------------------------------------------------------------------------*/
+    /// <summary>
+    ///   Adds the fully-qualified <c>{area:exists}/{controller}/{action=Index}/{id?}</c> endpoint route for all areas.
+    /// </summary>
+    /// <remarks>
+    ///   This is analogous to the standard <see cref="ControllerEndpointRouteBuilderExtensions.MapDefaultControllerRoute(
+    ///   IEndpointRouteBuilder)"/> method that ships with ASP.NET, except that it works with areas.
+    /// </remarks>
+    public static void MapDefaultAreaControllerRoute(this IEndpointRouteBuilder routes) =>
+      routes.MapControllerRoute(
+        name: "TopicAreas",
+        pattern: "{area:exists}/{controller}/{action=Index}/{id?}"
+      );
+
     /*==========================================================================================================================
     | EXTENSION: MAP TOPIC REDIRECT (IENDPOINTROUTEBUILDER)
     \-------------------------------------------------------------------------------------------------------------------------*/