Refactoring XRpcFault serialization

--HG--
branch : 1.x

src/Orchard.Tests.Modules/XmlRpc/Services/XmlRpcWriterTests.cs

@@ -41,6 +41,25 @@ namespace Orchard.Tests.Modules.XmlRpc.Services {
 ")));
         }
 
+        [Test]
+        public void FaultShouldBeCorrectlyFormatted() {
+            var mapper = new XmlRpcWriter();
+            var response = new XRpcMethodResponse {
+                Fault = new XRpcFault(10, "foo")
+            };
+
+            var element = mapper.MapMethodResponse(response);
+
+            Assert.That(NoSpace(element.ToString()), Is.EqualTo(NoSpace(@"
+<methodResponse><fault>
+<value><struct>
+<member><name>faultCode</name><value><int>10</int></value></member>
+<member><name>faultString</name><value><string>foo</string></value></member>
+</struct></value>
+</fault></methodResponse>
+")));
+        }
+
         private static string NoSpace(string text) {
             return text.Replace(" ", "").Replace("\r", "").Replace("\n", "").Replace("\t", "");
         }

src/Orchard.Web/Core/XmlRpc/Controllers/HomeController.cs

@@ -43,11 +43,7 @@ namespace Orchard.Core.XmlRpc.Controllers {
             catch (OrchardCoreException e) {
                 // if a core exception is raised, report the error message, otherwise signal a 500
                 context.Response =  context.Response ?? new XRpcMethodResponse();
-
-                context.Response.Fault = new XRpcFault {
-                    Code = 0, 
-                    Message = e.LocalizedMessage.ToString()
-                };   
+                context.Response.Fault = new XRpcFault(0, e.LocalizedMessage.ToString());
             }
 
             return context.Response;

src/Orchard.Web/Core/XmlRpc/Models/XRpcData.cs

@@ -41,6 +41,11 @@ namespace Orchard.Core.XmlRpc.Models {
     }
 
     public class XRpcFault {
+        public XRpcFault(int code, string message) {
+            Code = code;
+            Message = message;
+        }
+
         public string Message { get; set; }
         public int Code { get; set; }
     }

src/Orchard.Web/Core/XmlRpc/Services/XmlRpcWriter.cs

@@ -43,18 +43,16 @@ namespace Orchard.Core.XmlRpc.Services {
 
             // return a valid fault as per http://xmlrpc.scripting.com/spec.html
             if(rpcMethodResponse.Fault != null) {
+                var members = new XRpcStruct();
+                members.Set("faultCode", rpcMethodResponse.Fault.Code);
+                members.Set("faultString", rpcMethodResponse.Fault.Message);
+
                 return new XElement("methodResponse",
                     new XElement("fault",
-                        new XElement("value",
-                            new XElement("struct",
-                                new XElement("member",
-                                    new XElement("name", "faultCode"),
-                                    new XElement("value",
-                                        new XElement("int", rpcMethodResponse.Fault.Code))),
-                                new XElement("member",
-                                    new XElement("name", "faultString"),
-                                    new XElement("value",
-                                        new XElement("string", rpcMethodResponse.Fault.Message)))))));
+                        new XElement("value", MapStruct(members))
+                    )
+                );
+                            
             }
 
             return new XElement("methodResponse",