From c897bd60c42210a50b88e6f7959b8667b4ef70dc Mon Sep 17 00:00:00 2001
From: Mauro Servienti <mauro.servienti@gmail.com>
Date: Sun, 13 Dec 2020 11:34:07 +0100
Subject: [PATCH] Refactoring (#195)

* Minor tweaks

* TODOs

* Minor tweaks

* switch to switch :)

* no this qualifier
---
 .../CompositionHandler.cs                     |  3 ++
 .../CompositionOverControllersActionFilter.cs |  5 ++-
 .../DynamicViewModel.cs                       | 39 +++++++------------
 3 files changed, 21 insertions(+), 26 deletions(-)

diff --git a/src/ServiceComposer.AspNetCore/CompositionHandler.cs b/src/ServiceComposer.AspNetCore/CompositionHandler.cs
index c6be8230..6a483984 100644
--- a/src/ServiceComposer.AspNetCore/CompositionHandler.cs
+++ b/src/ServiceComposer.AspNetCore/CompositionHandler.cs
@@ -105,12 +105,14 @@ await Task.WhenAll(context.RequestServices.GetServices<IViewModelPreviewHandler>
                 request.SetModel(viewModel);
 
                 var handlers = handlerTypes.Select(type => context.RequestServices.GetRequiredService(type)).ToArray();
+                //TODO: if handlers == none we could shortcut to 404 here
 
                 foreach (var subscriber in handlers.OfType<ICompositionEventsSubscriber>())
                 {
                     subscriber.Subscribe(viewModel);
                 }
 
+                //TODO: if handlers == none we could shortcut again to 404 here
                 var pending = handlers.OfType<ICompositionRequestsHandler>()
                     .Select(handler => handler.Handle(request))
                     .ToList();
@@ -128,6 +130,7 @@ await Task.WhenAll(context.RequestServices.GetServices<IViewModelPreviewHandler>
                     }
                     catch (Exception ex)
                     {
+                        //TODO: refactor to Task.WhenAll
                         var errorHandlers = handlers.OfType<ICompositionErrorsHandler>();
                         foreach (var handler in errorHandlers)
                         {
diff --git a/src/ServiceComposer.AspNetCore/CompositionOverControllersActionFilter.cs b/src/ServiceComposer.AspNetCore/CompositionOverControllersActionFilter.cs
index f595985b..4d9bfd36 100644
--- a/src/ServiceComposer.AspNetCore/CompositionOverControllersActionFilter.cs
+++ b/src/ServiceComposer.AspNetCore/CompositionOverControllersActionFilter.cs
@@ -1,4 +1,5 @@
 #if NETCOREAPP3_1 || NET5_0
+using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
@@ -21,9 +22,9 @@ public CompositionOverControllersActionFilter(CompositionOverControllersRoutes c
 
         public async Task OnResultExecutionAsync(ResultExecutingContext context, ResultExecutionDelegate next)
         {
-            var endpoint = context.HttpContext.GetEndpoint() as RouteEndpoint;
-            if (endpoint != null)
+            if (context.HttpContext.GetEndpoint() is RouteEndpoint endpoint)
             {
+                Debug.Assert(endpoint.RoutePattern.RawText != null, "endpoint.RoutePattern.RawText != null");
                 var rawTemplate = _compositionOverControllersOptions.UseCaseInsensitiveRouteMatching
                     ? endpoint.RoutePattern.RawText.ToLowerInvariant()
                     : endpoint.RoutePattern.RawText;
diff --git a/src/ServiceComposer.AspNetCore/DynamicViewModel.cs b/src/ServiceComposer.AspNetCore/DynamicViewModel.cs
index bda58386..cc01327f 100644
--- a/src/ServiceComposer.AspNetCore/DynamicViewModel.cs
+++ b/src/ServiceComposer.AspNetCore/DynamicViewModel.cs
@@ -3,6 +3,7 @@
 using System;
 using System.Collections.Generic;
 using System.Dynamic;
+using System.Linq;
 using System.Threading.Tasks;
 
 namespace ServiceComposer.AspNetCore
@@ -18,9 +19,9 @@ class DynamicViewModel : DynamicObject, IPublishCompositionEvents, ICompositionE
 
         public DynamicViewModel(string requestId, RouteData routeData, HttpRequest httpRequest)
         {
-            this._requestId = requestId;
-            this._routeData = routeData;
-            this._httpRequest = httpRequest;
+            _requestId = requestId;
+            _routeData = routeData;
+            _httpRequest = httpRequest;
         }
 
         public void CleanupSubscribers() => _subscriptions.Clear();
@@ -59,19 +60,17 @@ public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, o
         {
             result = null;
 
-            if (binder.Name == "RaiseEvent")
+            switch (binder.Name)
             {
-                result = RaiseEventImpl(args[0]);
-                return true;
+                case "RaiseEvent":
+                    result = RaiseEventImpl(args[0]);
+                    return true;
+                case "Merge":
+                    result = MergeImpl((IDictionary<string, object>) args[0]);
+                    return true;
+                default:
+                    return false;
             }
-
-            if (binder.Name == "Merge")
-            {
-                result = MergeImpl((IDictionary<string, object>) args[0]);
-                return true;
-            }
-
-            return false;
         }
 
         public override IEnumerable<string> GetDynamicMemberNames()
@@ -89,22 +88,14 @@ Task RaiseEventImpl(object @event)
         {
             if (_subscriptions.TryGetValue(@event.GetType(), out var handlers))
             {
-                var tasks = new List<Task>();
-                foreach (var handler in handlers)
-                {
-                    tasks.Add(handler.Invoke(_requestId, this, @event, _routeData, _httpRequest));
-                }
+                var tasks = handlers.Select(handler => handler.Invoke(_requestId, this, @event, _routeData, _httpRequest)).ToList();
 
                 return Task.WhenAll(tasks);
             }
 
             if (_compositionEventsSubscriptions.TryGetValue(@event.GetType(), out var compositionHandlers))
             {
-                var tasks = new List<Task>();
-                foreach (var handler in compositionHandlers)
-                {
-                    tasks.Add(handler.Invoke(@event, _httpRequest));
-                }
+                var tasks = compositionHandlers.Select(handler => handler.Invoke(@event, _httpRequest)).ToList();
 
                 return Task.WhenAll(tasks);
             }