#5337: Fixed homepage becoming lost after publishing layout template being used by the homepage.

Work Item: 5337

src/Orchard.Web/Modules/Orchard.Layouts/Handlers/LayoutPartHandler.cs

@@ -1,9 +1,13 @@
-using Orchard.ContentManagement;
+using System;
+using Orchard.Alias;
+using Orchard.Autoroute.Models;
+using Orchard.ContentManagement;
 using Orchard.ContentManagement.Handlers;
 using Orchard.Data;
 using Orchard.DisplayManagement;
 using Orchard.Layouts.Models;
 using Orchard.Layouts.Services;
+using Orchard.Utility.Extensions;
 
 namespace Orchard.Layouts.Handlers {
     public class LayoutPartHandler : ContentHandler {
@@ -13,6 +17,7 @@ namespace Orchard.Layouts.Handlers {
         private readonly IShapeDisplay _shapeDisplay;
         private readonly ILayoutSerializer _serializer;
         private readonly IStaticHttpContextScopeFactory _staticHttpContextScopeFactory;
+        private readonly IAliasService _aliasService;
 
         public LayoutPartHandler(
             IRepository<LayoutPartRecord> repository, 
@@ -21,7 +26,8 @@ namespace Orchard.Layouts.Handlers {
             IContentPartDisplay contentPartDisplay, 
             IShapeDisplay shapeDisplay, 
             ILayoutSerializer serializer,
-            IStaticHttpContextScopeFactory staticHttpContextScopeFactory) {
+            IStaticHttpContextScopeFactory staticHttpContextScopeFactory,
+            IAliasService aliasService) {
 
             _layoutManager = layoutManager;
             _contentManager = contentManager;
@@ -29,6 +35,7 @@ namespace Orchard.Layouts.Handlers {
             _shapeDisplay = shapeDisplay;
             _serializer = serializer;
             _staticHttpContextScopeFactory = staticHttpContextScopeFactory;
+            _aliasService = aliasService;
 
             Filters.Add(StorageFilter.For(repository));
             OnPublished<LayoutPart>(UpdateTemplateClients);
@@ -77,6 +84,12 @@ namespace Orchard.Layouts.Handlers {
                 draft.LayoutData = _serializer.Serialize(updatedLayout);
 
                 if (isPublished) {
+                    // If the content being published is currently the homepage, we need to change the DisplayAlias from "" to "/"
+                    // so that the autoroute part handler will not regenerate the alias and causes the homepage to become "lost".
+                    if (IsHomePage(layout)) {
+                        PromoteToHomePage(draft);
+                    }
+
                     // We don't have to recurse here, since invoking Publish on a Layout will cause this handler to execute again.
                     _contentManager.Publish(draft.ContentItem);
                 }
@@ -85,5 +98,20 @@ namespace Orchard.Layouts.Handlers {
                 }
             }
         }
+
+        private bool IsHomePage(IContent content) {
+            var homepage = _aliasService.Get(String.Empty);
+            var displayRouteValues = _contentManager.GetItemMetadata(content).DisplayRouteValues;
+            return homepage.Match(displayRouteValues);
+        }
+
+        private void PromoteToHomePage(IContent content) {
+            var autoroutePart = content.As<AutoroutePart>();
+
+            if (autoroutePart == null)
+                return;
+
+            autoroutePart.DisplayAlias = "/";
+        }
     }
 }

src/Orchard.Web/Modules/Orchard.Layouts/Orchard.Layouts.csproj

@@ -287,6 +287,14 @@
       <Project>{3158c928-888c-4a84-8bc1-4a8257489538}</Project>
       <Name>Markdown</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Orchard.Alias\Orchard.Alias.csproj">
+      <Project>{475b6c45-b27c-438b-8966-908b9d6d1077}</Project>
+      <Name>Orchard.Alias</Name>
+    </ProjectReference>
+    <ProjectReference Include="..\Orchard.Autoroute\Orchard.Autoroute.csproj">
+      <Project>{66fccd76-2761-47e3-8d11-b45d0001ddaa}</Project>
+      <Name>Orchard.Autoroute</Name>
+    </ProjectReference>
     <ProjectReference Include="..\Orchard.Forms\Orchard.Forms.csproj">
       <Project>{642a49d7-8752-4177-80d6-bfbbcfad3de0}</Project>
       <Name>Orchard.Forms</Name>