Issue #3402: Implemented List tokens.

src/Orchard.Web/Modules/Orchard.Tokens/Implementation/Tokenizer.cs

@@ -59,7 +59,7 @@ namespace Orchard.Tokens.Implementation {
         private static Tuple<string, IEnumerable<string>> Parse(string text, bool hashMode) {
             var tokens = new List<string>();
             if (!String.IsNullOrEmpty(text)) {
-                var inToken = false;
+                var inTokenDepth = 0;
                 var tokenStart = 0;
                 for (var i = 0; i < text.Length; i++) {
                     var c = text[i];
@@ -70,29 +70,32 @@ namespace Orchard.Tokens.Implementation {
                             continue;
                         }
                     }
-                    else if (c == '}' && !(inToken)) {
+                    else if (c == '}' && inTokenDepth == 0) {
                         if (i + 1 < text.Length && text[i + 1] == '}') {
                             text = text.Substring(0, i) + text.Substring(i + 1);
                             continue;
                         }
                     }
 
-                    if (inToken) {
+                    if (inTokenDepth > 0) {
                         if (c == '}') {
-                            inToken = false;
-                            var token = text.Substring(tokenStart + 1, i - tokenStart - 1);
-                            tokens.Add(token);
+                            inTokenDepth--;
+                            if (inTokenDepth == 0) {
+                                var token = text.Substring(tokenStart + 1, i - tokenStart - 1);
+                                tokens.Add(token);
+                            }
                         }
                     }
-                    else if (!hashMode && c == '{') {
-                        inToken = true;
-                        tokenStart = i;
+                    
+                    if (!hashMode && c == '{') {                       
+                        if (inTokenDepth == 0) tokenStart = i;
+                        inTokenDepth++;
                     }
                     else if (hashMode && c == '#' 
                         && i + 1 < text.Length && text[i + 1] == '{'
-                        && (i + 2 > text.Length || text[i + 2] != '{') ) {
-                        inToken = true;
-                        tokenStart = i+1;
+                        && (i + 2 > text.Length || text[i + 2] != '{') ) {          
+                        if (inTokenDepth == 0) tokenStart = i+1;
+                        inTokenDepth++;
                     }
                 }
             }

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

@@ -100,6 +100,7 @@
   <ItemGroup>
     <Compile Include="Controllers\AdminController.cs" />
     <Compile Include="Providers\ContentTokens.cs" />
+    <Compile Include="Providers\ListTokens.cs" />
     <Compile Include="Providers\UrlHelperTokens.cs" />
     <Compile Include="Providers\RssPartFeedItemBuilder.cs" />
     <Compile Include="Providers\RequestTokens.cs" />

src/Orchard.Web/Modules/Orchard.Tokens/Providers/ListTokens.cs

@@ -0,0 +1,106 @@
+using System;
+using System.Collections.Generic;
+using System.Web;
+using Orchard.ContentManagement;
+using Orchard.Localization;
+using System.Linq;
+	 
+namespace Orchard.Tokens.Providers {
+	 
+	public class ListTokens : ITokenProvider {
+	    private readonly Func<ITokenizer> _tokenizer;
+	 
+	    public ListTokens(Func<ITokenizer> tokenizer) {
+	        _tokenizer = tokenizer;
+	        T = NullLocalizer.Instance;
+	    }
+	 
+	    public Localizer T { get; set; }
+	 
+	    public void Describe(DescribeContext context) {
+	        context.For("List", T("Lists"), T("Handles lists of Content Items"))
+                .Token("Join:*", T("Join:<Tokenized text>[,<separator>]"), T("Join each element in the list by applying the tokenized text and concatenating the output with the optional separator."))
+                .Token("SumInt:*", T("SumInt:<Tokenized text>"), T("Sum each element in the list by applying the tokenized text."))
+                .Token("SumFloat:*", T("SumFloat:<Tokenized text>"), T("Sum each element in the list by applying the tokenized text."))
+                .Token("SumDecimal:*", T("SumDecimal:<Tokenized text>"), T("Sum each element in the list by applying the tokenized text."))
+                .Token("First:*", T("First:<Tokenized text>"), T("Apply the tokenized text to the first element."))
+                .Token("Last:*", T("Last:<Tokenized text>"), T("Apply the tokenized text to the last element."))
+                .Token("Count", T("Count"), T("Get the list count."))
+                ;
+	    }
+	 
+	    public void Evaluate(EvaluateContext context) {
+            context.For<IList<IContent>>("List", () => new List<IContent>())
+                    .Token( // {List.ForEach:<string>[,<separator>]}
+	                token => {
+	                    if (token.StartsWith("Join:", StringComparison.OrdinalIgnoreCase)) {
+	                        // html decode to stop double encoding.
+	                        return HttpUtility.HtmlDecode(token.Substring("Join:".Length));
+	                    }
+	                    return null;
+	                },
+	                (token, collection) => {
+	                    if (String.IsNullOrEmpty(token)) {
+	                        return String.Empty;
+	                    }
+                        // Split the params to get the tokenized text and optional separator.
+                        var index = token.IndexOf(',');
+	                    var text = index == -1 ? token : token.Substring(0, index);
+	                    if (String.IsNullOrEmpty(text)) {
+	                        return String.Empty;
+	                    }
+	                    var separator = index == -1 ? String.Empty : token.Substring(index + 1);
+	                    return String.Join(separator, collection.Select(content => _tokenizer().Replace(text, new {content}, new ReplaceOptions {Encoding = ReplaceOptions.NoEncode})));
+	                })
+                    .Token( // {List.SumInt:<string>}
+	                token => {
+	                    if (token.StartsWith("SumInt:", StringComparison.OrdinalIgnoreCase)) {
+	                        // html decode to stop double encoding.
+	                        return HttpUtility.HtmlDecode(token.Substring("SumInt:".Length));
+	                    }
+	                    return null;
+	                },
+	                (token, collection) => collection.Sum(i => long.Parse(_tokenizer().Replace(token, new { Content = i }, new ReplaceOptions { Encoding = ReplaceOptions.NoEncode }))))
+                    .Token( // {List.SumFloat:<string>}
+	                token => {
+	                    if (token.StartsWith("SumFloat:", StringComparison.OrdinalIgnoreCase)) {
+	                        // html decode to stop double encoding.
+	                        return HttpUtility.HtmlDecode(token.Substring("SumFloat:".Length));
+	                    }
+	                    return null;
+	                },
+	                (token, collection) => collection.Sum(i => double.Parse(_tokenizer().Replace(token, new { Content = i }, new ReplaceOptions { Encoding = ReplaceOptions.NoEncode }))))
+	                .Token( // {List.SumDecimal:<string>}
+	                token => {
+	                    if (token.StartsWith("SumDecimal:", StringComparison.OrdinalIgnoreCase)) {
+	                        // html decode to stop double encoding.
+	                        return HttpUtility.HtmlDecode(token.Substring("SumDecimal:".Length));
+	                    }
+	                    return null;
+	                },
+                    (token, collection) => collection.Sum(i => decimal.Parse(_tokenizer().Replace(token, new { Content = i }, new ReplaceOptions { Encoding = ReplaceOptions.NoEncode }))))
+                    .Token( // {List.First:<string>}
+                    token => {
+                        if (token.StartsWith("First:", StringComparison.OrdinalIgnoreCase)) {
+                            // html decode to stop double encoding.
+                            return HttpUtility.HtmlDecode(token.Substring("First:".Length));
+                        }
+                        return null;
+                    },
+                    (token, list) => list.Any() ? _tokenizer().Replace(token, new { Content = list.First() }, new ReplaceOptions { Encoding = ReplaceOptions.NoEncode }) : String.Empty)
+                    .Token( // {List.Last:<string>}
+                    token => {
+                        if (token.StartsWith("Last:", StringComparison.OrdinalIgnoreCase)) {
+                            // html decode to stop double encoding.
+                            return HttpUtility.HtmlDecode(token.Substring("Last:".Length));
+                        }
+                        return null;
+                    },
+                    (token, list) => list.Any() ? _tokenizer().Replace(token, new { Content = list.Last() }, new ReplaceOptions { Encoding = ReplaceOptions.NoEncode }) : String.Empty)
+                    .Token( // {List.Count}
+                    "Count",
+                    list => list.Count)
+	            ;
+	    }
+	}
+}

src/Orchard.Web/Modules/Orchard.Tokens/Tests/ListTokenTests.cs

@@ -0,0 +1,71 @@
+using System.Collections.Generic;
+using Autofac;
+using NUnit.Framework;
+using Orchard.ContentManagement;
+using Orchard.Tokens.Implementation;
+using Orchard.Tokens.Providers;
+
+namespace Orchard.Tokens.Tests {
+    [TestFixture]
+    public class ListTokenTests {
+        private IContainer _container;
+        private ITokenizer _tokenizer;
+
+        [SetUp]
+        public void Init() {
+            var builder = new ContainerBuilder();
+            builder.RegisterType<Tokenizer>().As<ITokenizer>();
+            builder.RegisterType<TokenManager>().As<ITokenManager>();
+            builder.RegisterType<ListTokens>().As<ITokenProvider>();
+            builder.RegisterType<TestTokenProvider>().As<ITokenProvider>();
+            //builder.RegisterType<Work<Tokenizer>>().As<Work<ITokenizer>>();
+            _container = builder.Build();
+            _tokenizer = _container.Resolve<ITokenizer>();
+        }
+
+        [Test]
+        public void TestListJoinTokens() {
+            Assert.That(_tokenizer.Replace("{List.Join:{Content.Id}}", new {List = new List<IContent> {new TestUser {Id = 5}, new TestUser {Id = 10}}}), Is.EqualTo("510"));
+        }
+
+        [Test]
+        public void TestListJoinWithSeparatorTokens() {
+            Assert.That(_tokenizer.Replace("{List.Join:UserId is: {Content.Id},, }", new { List = new List<IContent> { new TestUser { Id = 5 }, new TestUser { Id = 10 } } }), Is.EqualTo("UserId is: 5, UserId is: 10"));
+        }
+
+        [Test]
+        public void TestListSumTokens() {
+            Assert.That(_tokenizer.Replace("{List.SumInt:{Content.Id}}", new {List = new List<IContent> {new TestUser {Id = 5}, new TestUser {Id = 10}}}), Is.EqualTo("15"));
+        }
+
+        [Test]
+        public void TestListFirstTokens() {
+            Assert.That(_tokenizer.Replace("{List.First:{Content.Id}}", new {List = new List<IContent> {new TestUser {Id = 5}, new TestUser {Id = 10}}}), Is.EqualTo("5"));
+        }
+
+        [Test]
+        public void TestListLastTokens() {
+            Assert.That(_tokenizer.Replace("{List.Last:{Content.Id}}", new {List = new List<IContent> {new TestUser {Id = 5}, new TestUser {Id = 10}}}), Is.EqualTo("10"));
+        }
+
+        [Test]
+        public void TestListCountTokens() {
+            Assert.That(_tokenizer.Replace("{List.Count}", new {List = new List<IContent> {new TestUser(), new TestUser()}}), Is.EqualTo("2"));
+        }
+
+        [Test]
+        public void TestListTokensAdhereToEncodings() {
+            Assert.That(_tokenizer.Replace(
+                "{List.Join:<strong>{Content.Id}<strong>}",
+                new {List = new List<IContent> {new TestUser {Id = 5}, new TestUser {Id = 10}}}, 
+                new ReplaceOptions {Encoding = ReplaceOptions.HtmlEncode}),
+                Is.EqualTo("&lt;strong&gt;5&lt;strong&gt;&lt;strong&gt;10&lt;strong&gt;"));
+            Assert.That(_tokenizer.Replace(
+                "{List.Join:<strong>{Content.Id}<strong>}",
+                new {List = new List<IContent> {new TestUser {Id = 5}, new TestUser {Id = 10}}}, 
+                new ReplaceOptions {Encoding = ReplaceOptions.NoEncode}),
+                Is.EqualTo("<strong>5<strong><strong>10<strong>"));
+        }
+
+    }
+}

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

@@ -55,6 +55,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="DateTokenTests.cs" />
+    <Compile Include="ListTokenTests.cs" />
     <Compile Include="StubClock.cs" />
     <Compile Include="StubOrchardServices.cs" />
     <Compile Include="StubWorkContextAccessor.cs" />

src/Orchard.Web/Modules/Orchard.Tokens/Tests/TestTokenProvider.cs

@@ -38,6 +38,9 @@ namespace Orchard.Tokens.Tests {
                 .Token("CurrentUser", o => new TestUser { UserName = "CurrentUser" })
                 .Chain("CurrentUser", "User", o => new TestUser { UserName = "CurrentUser" });
 
+            context.For<IContent>("Content")
+                .Token("Id", u => u.Id);
+
             context.For<IUser>("User", () => new TestUser { UserName = "CurrentUser" })
                 .Token("Name", u => u.UserName)
                 .Token("Email", u => u.Email)