Implementing a tokens html filter

src/Orchard.Web/Modules/Orchard.Tokens/Filters/TokensFilter.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Web;
+using Orchard.ContentManagement;
+using Orchard.ContentManagement.Handlers;
+using Orchard.Environment.Extensions;
+using Orchard.Services;
+
+namespace Orchard.Tokens.Filters.Services {
+
+    [OrchardFeature("Orchard.Tokens.HtmlFilter")]
+    public class TokensFilter : ContentHandler, IHtmlFilter {
+
+        private readonly ITokenizer _tokenizer;
+        private ContentItem _displayed;
+ 
+        public TokensFilter(ITokenizer tokenizer) {
+            _tokenizer = tokenizer;
+        }
+
+        protected override void BuildDisplayShape(BuildDisplayContext context) {
+            _displayed = context.ContentItem;
+        }
+
+        public string ProcessContent(string text, string flavor) {
+            return TokensReplace(text);
+        }
+
+        private string TokensReplace(string text) {
+            if (_displayed == null) {
+                return text;
+            }
+
+            if (string.IsNullOrEmpty(text))
+                return string.Empty;
+
+            // optimize code path if nothing to do
+            if (!text.Contains("#{")) {
+                return text;
+            }
+
+            Dictionary<string, object> data = new Dictionary<string, object>() { { "Content", _displayed } };
+
+            text = _tokenizer.Replace(text, data);
+
+            _displayed = null;
+
+            return text;
+        }
+    }
+}

src/Orchard.Web/Modules/Orchard.Tokens/Module.txt

@@ -14,4 +14,9 @@ Features:
 		Name: Feeds Tokens 
 		Description: Provides a content part to customize RSS fields based on tokens.
 		Category: Content
-		Dependencies: Orchard.Tokens, Feeds
+		Dependencies: Orchard.Tokens, Feeds
+	Orchard.Tokens.HtmlFilter:
+		Name: Tokens Html Filter
+		Description: Evaluates tokens in a body.
+		Category: Content
+		Dependencies: Orchard.Tokens

src/Orchard.Web/Modules/Orchard.Tokens/Orchard.Tokens.csproj

@@ -77,6 +77,7 @@
     <Content Include="Styles\orchard-tokens-admin.css" />
     <Content Include="Styles\Images\tokensPopup.gif" />
     <Content Include="Web.config" />
+    <Compile Include="Filters\TokensFilter.cs" />
     <Compile Include="Migrations.cs" />
     <Compile Include="Models\RssPart.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />