More viewengine migration. Including wrapping in profiler etcs

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Web.Website/ViewEngines/ProfilingViewEngineWrapperMvcViewOptionsSetup.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.ViewEngines;
+using Microsoft.Extensions.Options;
+using Umbraco.Core.Logging;
+
+namespace Umbraco.Web.Website.ViewEngines
+{
+    public class ProfilingViewEngineWrapperMvcViewOptionsSetup : IConfigureOptions<MvcViewOptions>
+    {
+        private readonly IProfiler _profiler;
+
+        public ProfilingViewEngineWrapperMvcViewOptionsSetup(IProfiler profiler)
+        {
+            _profiler = profiler ?? throw new ArgumentNullException(nameof(profiler));
+        }
+
+        public void Configure(MvcViewOptions options)
+        {
+            if (options == null)
+            {
+                throw new ArgumentNullException(nameof(options));
+            }
+
+            WrapViewEngines(options.ViewEngines);
+        }
+
+        private void WrapViewEngines(IList<IViewEngine> viewEngines)
+        {
+            if (viewEngines == null || viewEngines.Count == 0) return;
+
+            var originalEngines = viewEngines.ToList();
+            viewEngines.Clear();
+            foreach (var engine in originalEngines)
+            {
+                var wrappedEngine = engine is ProfilingViewEngine ? engine : new ProfilingViewEngine(engine, _profiler);
+                viewEngines.Add(wrappedEngine);
+            }
+        }
+    }
+}