Close #2027 : Add role rule in Orchard.Widgets module

src/Orchard.Web/Modules/Orchard.Roles/Orchard.Roles.csproj

@@ -25,6 +25,7 @@
     <IISExpressAnonymousAuthentication />
     <IISExpressWindowsAuthentication />
     <IISExpressUseClassicPipelineMode />
+    <UseGlobalApplicationHostFile />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -101,6 +102,7 @@
     <Compile Include="Models\UserRolesPartRecord.cs" />
     <Compile Include="Permissions.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="RuleEngine\RoleRuleProvider.cs" />
     <Compile Include="Services\IRoleService.cs" />
     <Compile Include="Services\RolesBasedAuthorizationService.cs" />
     <Compile Include="Services\RoleService.cs" />

src/Orchard.Web/Modules/Orchard.Roles/RuleEngine/RoleRuleProvider.cs

@@ -0,0 +1,36 @@
+using Orchard.ContentManagement;
+using Orchard.Events;
+using Orchard.Roles.Models;
+using Orchard.Security;
+using System;
+using System.Linq;
+
+namespace Orchard.Roles.RuleEngine {
+    public interface IRuleProvider : IEventHandler {
+        void Process(dynamic ruleContext);
+    }
+
+    public class RoleRuleProvider : IRuleProvider {
+        private readonly IAuthenticationService _authenticationService;
+
+        public RoleRuleProvider(IAuthenticationService authenticationService) {
+            _authenticationService = authenticationService;
+        }
+
+        public void Process(dynamic ruleContext) {
+            if (!String.Equals(ruleContext.FunctionName, "role", StringComparison.OrdinalIgnoreCase)) {
+                return;
+            }
+
+            var user = _authenticationService.GetAuthenticatedUser();
+            if (user == null) {
+                ruleContext.Result = false;
+                return;
+            }
+
+            var roles = ((object[])ruleContext.Arguments).Cast<string>();
+            var userRoles = user.As<IUserRoles>();
+            ruleContext.Result = userRoles != null ? userRoles.Roles.Intersect(roles).Count() > 0 : false;
+        }
+    }
+}