From 2fc774e93b8dff603709e1141dabf66d055a759b Mon Sep 17 00:00:00 2001
From: Sebastien Ros <sebastien.ros@microsoft.com>
Date: Tue, 20 Aug 2013 16:54:55 -0700
Subject: [PATCH] #19956: Adding a token for MediaLibraryFieldPicker

Work Item: 19956
---
 .../Fields/MediaLibraryPickerField.cs         |  3 +-
 .../MediaLibraryPickerFieldHandler.cs         | 19 +++++----
 .../Modules/Orchard.MediaLibrary/Module.txt   |  2 +-
 .../Orchard.MediaLibrary.csproj               |  5 +++
 .../Tokens/FieldTokens.cs                     | 42 +++++++++++++++++++
 5 files changed, 61 insertions(+), 10 deletions(-)
 create mode 100644 src/Orchard.Web/Modules/Orchard.MediaLibrary/Tokens/FieldTokens.cs

diff --git a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Fields/MediaLibraryPickerField.cs b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Fields/MediaLibraryPickerField.cs
index 56c0ba972..59a422488 100644
--- a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Fields/MediaLibraryPickerField.cs
+++ b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Fields/MediaLibraryPickerField.cs
@@ -3,13 +3,12 @@ using System.Collections.Generic;
 using System.Linq;
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.FieldStorage;
-using Orchard.ContentManagement.Utilities;
 using Orchard.MediaLibrary.Models;
 
 namespace Orchard.MediaLibrary.Fields {
     public class MediaLibraryPickerField : ContentField {
         private static readonly char[] separator = new [] {'{', '}', ','};
-        internal LazyField<IEnumerable<MediaPart>> _contentItems = new LazyField<IEnumerable<MediaPart>>();
+        internal Lazy<IEnumerable<MediaPart>> _contentItems;
  
         public int[] Ids {
             get { return DecodeIds(Storage.Get<string>()); }
diff --git a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Handlers/MediaLibraryPickerFieldHandler.cs b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Handlers/MediaLibraryPickerFieldHandler.cs
index 88986bcb3..d065e2d1b 100644
--- a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Handlers/MediaLibraryPickerFieldHandler.cs
+++ b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Handlers/MediaLibraryPickerFieldHandler.cs
@@ -1,4 +1,6 @@
-using System.Linq;
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.Handlers;
 using Orchard.ContentManagement.MetaData;
@@ -18,20 +20,23 @@ namespace Orchard.MediaLibrary.Handlers {
             _contentDefinitionManager = contentDefinitionManager;
         }
 
-        protected override void Loading(LoadContentContext context) {
+        protected override void Loaded(LoadContentContext context) {
             base.Loading(context);
+            InitilizeLoader(context.ContentItem);
+        }
 
-            var fields = context.ContentItem.Parts.SelectMany(x => x.Fields.Where(f => f.FieldDefinition.Name == typeof(MediaLibraryPickerField).Name)).Cast<MediaLibraryPickerField>();
-            
-            // define lazy initializer for ContentPickerField.ContentItems
-            var contentTypeDefinition = _contentDefinitionManager.GetTypeDefinition(context.ContentType);
+        private void InitilizeLoader(ContentItem contentItem) {
+            var fields = contentItem.Parts.SelectMany(x => x.Fields.OfType<MediaLibraryPickerField>());
+
+            // define lazy initializer for MediaLibraryPickerField.MediaParts
+            var contentTypeDefinition = _contentDefinitionManager.GetTypeDefinition(contentItem.ContentType);
             if (contentTypeDefinition == null) {
                 return;
             }
 
             foreach (var field in fields) {
                 var localField = field;
-                field._contentItems.Loader(x => _contentManager.GetMany<MediaPart>(localField.Ids, VersionOptions.Published, QueryHints.Empty));
+                localField._contentItems = new Lazy<IEnumerable<MediaPart>>(() => _contentManager.GetMany<MediaPart>(localField.Ids, VersionOptions.Published, QueryHints.Empty).ToList());
             }
         }
     }
diff --git a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Module.txt b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Module.txt
index c8347f2fc..edda9754a 100644
--- a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Module.txt
+++ b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Module.txt
@@ -9,5 +9,5 @@ Features:
     Orchard.MediaLibrary:
 		Name: Media Library
         Description: Provides enhanced Media management tools.
-		Dependencies: Title, Orchard.MediaProcessing
+		Dependencies: Title, Orchard.MediaProcessing, Orchard.Tokens
 		Category: Media
\ No newline at end of file
diff --git a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Orchard.MediaLibrary.csproj b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Orchard.MediaLibrary.csproj
index 327094d44..d3f8798c5 100644
--- a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Orchard.MediaLibrary.csproj
+++ b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Orchard.MediaLibrary.csproj
@@ -109,6 +109,10 @@
       <Project>{9916839C-39FC-4CEB-A5AF-89CA7E87119F}</Project>
       <Name>Orchard.Core</Name>
     </ProjectReference>
+    <ProjectReference Include="..\Orchard.Tokens\Orchard.Tokens.csproj">
+      <Project>{6f759635-13d7-4e94-bcc9-80445d63f117}</Project>
+      <Name>Orchard.Tokens</Name>
+    </ProjectReference>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="ModalAdminFilter.cs" />
@@ -159,6 +163,7 @@
     <Compile Include="Services\XmlRpcHandler.cs" />
     <Compile Include="Settings\MediaLibraryPickerFieldEditorEvents.cs" />
     <Compile Include="Settings\MediaLibraryPickerFieldSettings.cs" />
+    <Compile Include="Tokens\FieldTokens.cs" />
     <Compile Include="ViewModels\MediaLibraryPickerFieldViewModel.cs" />
     <Compile Include="ViewModels\MediaManagerMediaItemsViewModel.cs" />
     <Compile Include="ViewModels\MediaManagerFolderCreateViewModel.cs" />
diff --git a/src/Orchard.Web/Modules/Orchard.MediaLibrary/Tokens/FieldTokens.cs b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Tokens/FieldTokens.cs
new file mode 100644
index 000000000..28c37c768
--- /dev/null
+++ b/src/Orchard.Web/Modules/Orchard.MediaLibrary/Tokens/FieldTokens.cs
@@ -0,0 +1,42 @@
+using System.Linq;
+using Orchard.ContentManagement;
+using Orchard.Localization;
+using Orchard.MediaLibrary.Fields;
+using Orchard.MediaLibrary.Models;
+using Orchard.Tokens;
+
+namespace Orchard.MediaLibrary.Tokens {
+
+    public class FieldTokens : ITokenProvider {
+        private readonly IContentManager _contentManager;
+
+
+        public FieldTokens(IContentManager contentManager) {
+            _contentManager = contentManager;
+            T = NullLocalizer.Instance;
+        }
+
+        public Localizer T { get; set; }
+
+        public void Describe(DescribeContext context) {
+            context.For("MediaLibraryPickerField", T("First media for Media Library Picker Field"), T("Tokens for Media Picker Fields"))
+                .Token("Url", T("Url"), T("The url of the media."), "Url")
+                ;
+        }
+
+        public void Evaluate(EvaluateContext context) {
+            context.For<MediaLibraryPickerField>("MediaLibraryPickerField")
+                .Token("Url", field => {
+                    var mediaId = field.Ids.FirstOrDefault();
+                    var media = _contentManager.Get<MediaPart>(mediaId);
+                    return media == null ? "" : media.MediaUrl;
+                })
+                .Chain("Url", "Url", field => {
+                    var mediaId = field.Ids.FirstOrDefault();
+                    var media = _contentManager.Get<MediaPart>(mediaId);
+                    return media == null ? "" : media.MediaUrl;
+                })
+                ;
+        }
+    }
+}
\ No newline at end of file