From 79042774bd3042362b094a2f44b48032aa64a733 Mon Sep 17 00:00:00 2001
From: Nicholas Mayne <Jetski5822@gmail.com>
Date: Sat, 30 Aug 2014 00:45:55 +0100
Subject: [PATCH] Adding Culture Rule Provider. this required a change to the
 IRuleProvider to be an IEventHandler rather than a direct IDependency

---
 .../Orchard.Localization.csproj               |  1 +
 .../ContentDisplayedRuleProvider.cs           | 52 +++++++++++++++++++
 .../Orchard.Widgets/RuleEngine/RuleManager.cs |  9 ++--
 .../Orchard.Widgets/Services/IRuleProvider.cs |  6 ++-
 4 files changed, 61 insertions(+), 7 deletions(-)
 create mode 100644 src/Orchard.Web/Modules/Orchard.Localization/RuleEngine/ContentDisplayedRuleProvider.cs

diff --git a/src/Orchard.Web/Modules/Orchard.Localization/Orchard.Localization.csproj b/src/Orchard.Web/Modules/Orchard.Localization/Orchard.Localization.csproj
index 6ea0971b3..1bfe06e09 100644
--- a/src/Orchard.Web/Modules/Orchard.Localization/Orchard.Localization.csproj
+++ b/src/Orchard.Web/Modules/Orchard.Localization/Orchard.Localization.csproj
@@ -75,6 +75,7 @@
     <Compile Include="Controllers\CutlureSelectorController.cs" />
     <Compile Include="Models\TransliterationSpecificationRecord.cs" />
     <Compile Include="Providers\CultureSelectorSelector.cs" />
+    <Compile Include="RuleEngine\ContentDisplayedRuleProvider.cs" />
     <Compile Include="Services\AdminDirectionalityFactory.cs" />
     <Compile Include="Services\CultureSelectorFactory.cs" />
     <Compile Include="Services\LocalizationCultureFilter.cs" />
diff --git a/src/Orchard.Web/Modules/Orchard.Localization/RuleEngine/ContentDisplayedRuleProvider.cs b/src/Orchard.Web/Modules/Orchard.Localization/RuleEngine/ContentDisplayedRuleProvider.cs
new file mode 100644
index 000000000..b5b049ced
--- /dev/null
+++ b/src/Orchard.Web/Modules/Orchard.Localization/RuleEngine/ContentDisplayedRuleProvider.cs
@@ -0,0 +1,52 @@
+using System;
+using System.Globalization;
+using System.Linq;
+using Orchard.Events;
+using Orchard.Localization.Services;
+using Orchard.Mvc;
+
+namespace Orchard.Localization.RuleEngine {
+    public interface IRuleProvider : IEventHandler {
+        void Process(dynamic ruleContext);
+    }
+
+    public class CultureRuleProvider : IRuleProvider {
+        private readonly ICultureManager _cultureManager;
+        private readonly IHttpContextAccessor _httpContextAccessor;
+
+        public CultureRuleProvider(ICultureManager cultureManager, IHttpContextAccessor httpContextAccessor) {
+            _cultureManager = cultureManager;
+            _httpContextAccessor = httpContextAccessor;
+        }
+
+        public void Process(dynamic ruleContext) {
+            if (!String.Equals(ruleContext.FunctionName, "culture-code", StringComparison.OrdinalIgnoreCase)) {
+                ProcessCultureCode(ruleContext);
+            }
+
+            if (!String.Equals(ruleContext.FunctionName, "culture-lcid", StringComparison.OrdinalIgnoreCase)) {
+                ProcessCultureId(ruleContext);
+            }
+        }
+
+        private void ProcessCultureCode(dynamic ruleContext) {
+            var httpContext = _httpContextAccessor.Current();
+            var currentUserCulture = CultureInfo.GetCultureInfo(_cultureManager.GetCurrentCulture(httpContext));
+
+            ruleContext.Result = ((object[])ruleContext.Arguments)
+                .Cast<string>()
+                .Select(CultureInfo.GetCultureInfo)
+                .Any(c => c.Name == currentUserCulture.Name);
+        }
+
+        private void ProcessCultureId(dynamic ruleContext) {
+            var httpContext = _httpContextAccessor.Current();
+            var currentUserCulture = CultureInfo.GetCultureInfo(_cultureManager.GetCurrentCulture(httpContext));
+
+            ruleContext.Result = ((object[])ruleContext.Arguments)
+                .Cast<int>()
+                .Select(CultureInfo.GetCultureInfo)
+                .Any(c => c.Name == currentUserCulture.Name);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Orchard.Web/Modules/Orchard.Widgets/RuleEngine/RuleManager.cs b/src/Orchard.Web/Modules/Orchard.Widgets/RuleEngine/RuleManager.cs
index c605ae932..0f5ad2245 100644
--- a/src/Orchard.Web/Modules/Orchard.Widgets/RuleEngine/RuleManager.cs
+++ b/src/Orchard.Web/Modules/Orchard.Widgets/RuleEngine/RuleManager.cs
@@ -1,15 +1,16 @@
 using System.Collections.Generic;
 using System.Linq;
+using System.Security.Cryptography.X509Certificates;
 using Orchard.Localization;
 using Orchard.Scripting;
 using Orchard.Widgets.Services;
 
 namespace Orchard.Widgets.RuleEngine {
     public class RuleManager : IRuleManager {
-        private readonly IEnumerable<IRuleProvider> _ruleProviders;
+        private readonly IRuleProvider _ruleProviders;
         private readonly IEnumerable<IScriptExpressionEvaluator> _evaluators;
 
-        public RuleManager(IEnumerable<IRuleProvider> ruleProviders, IEnumerable<IScriptExpressionEvaluator> evaluators) {
+        public RuleManager(IRuleProvider ruleProviders, IEnumerable<IScriptExpressionEvaluator> evaluators) {
             _ruleProviders = ruleProviders;
             _evaluators = evaluators;
             T = NullLocalizer.Instance;
@@ -44,9 +45,7 @@ namespace Orchard.Widgets.RuleEngine {
                     Result = context.Result
                 };
 
-                foreach(var ruleProvider in _ruleManager._ruleProviders) {
-                    ruleProvider.Process(ruleContext);
-                }
+                _ruleManager._ruleProviders.Process(ruleContext);
 
                 context.Result = ruleContext.Result;
             }
diff --git a/src/Orchard.Web/Modules/Orchard.Widgets/Services/IRuleProvider.cs b/src/Orchard.Web/Modules/Orchard.Widgets/Services/IRuleProvider.cs
index 260b46f0c..cd30e3f8c 100644
--- a/src/Orchard.Web/Modules/Orchard.Widgets/Services/IRuleProvider.cs
+++ b/src/Orchard.Web/Modules/Orchard.Widgets/Services/IRuleProvider.cs
@@ -1,5 +1,7 @@
-namespace Orchard.Widgets.Services {
-    public interface IRuleProvider : IDependency {
+using Orchard.Events;
+
+namespace Orchard.Widgets.Services {
+    public interface IRuleProvider : IEventHandler {
         void Process(RuleContext ruleContext);
     }
 }
\ No newline at end of file