use existing library function to lookup previous name hints

src/DynamoCore/Graph/Nodes/NodeLoaders/ZeroTouchNodeLoader.cs

@@ -43,7 +43,7 @@ public NodeModel CreateNodeFromXml(XmlElement nodeElement, SaveContext context,
                 string xmlSignature = nodeElement.Attributes["function"].Value;
 
                 string hintedSigniture =
-                    libraryServices.FunctionSignatureFromFunctionSignatureHint(xmlSignature);
+                    libraryServices.GetFunctionSignatureFromFunctionSignatureHint(xmlSignature);
 
                 if (hintedSigniture != null)
                 {

src/DynamoCore/Graph/Workspaces/SerializationConverters.cs

@@ -230,15 +230,8 @@ public override object ReadJson(JsonReader reader, Type objectType, object exist
             else if (typeof(DSFunctionBase).IsAssignableFrom(type))
             {
                 var mangledName = obj["FunctionSignature"].Value<string>();
-                var priorNames = libraryServices.GetPriorNames();
-                var functionDescriptor = libraryServices.GetFunctionDescriptor(mangledName);
-                string newName;
-
-                // Update the function descriptor if a newer migrated version of the node exists
-                if (priorNames.TryGetValue(mangledName, out newName))
-                {
-                    functionDescriptor = libraryServices.GetFunctionDescriptor(newName);
-                }
+                var lookupSignature = libraryServices.GetFunctionSignatureFromFunctionSignatureHint(mangledName) ?? mangledName;
+                var functionDescriptor = libraryServices.GetFunctionDescriptor(lookupSignature);
 
                 // Use the functionDescriptor to try and restore the proper node if possible
                 if (functionDescriptor == null)

src/DynamoCore/Library/LibraryServices.cs

@@ -305,7 +305,7 @@ internal string NameFromFunctionSignature(string functionSignature)
             return splitted[splitted.Length - 2] + "." + splitted[splitted.Length - 1];
         }
 
-        internal string FunctionSignatureFromFunctionSignatureHint(string functionSignature)
+        internal string GetFunctionSignatureFromFunctionSignatureHint(string functionSignature)
         {
             // if the hint is explicit, we can simply return the mapped function
             if (priorNameHints.ContainsKey(functionSignature))

test/DynamoCoreTests/MigrationTestFramework.cs

@@ -17,6 +17,7 @@ protected override void GetLibrariesToPreload(List<string> libraries)
             libraries.Add("DSOffice.dll");
             libraries.Add("FunctionObject.ds");
             libraries.Add("BuiltIn.ds");
+            libraries.Add("FFITarget.dll");
             base.GetLibrariesToPreload(libraries);
         }
 

test/DynamoCoreTests/NodeMigrationTests.cs

@@ -25,6 +25,7 @@ protected override void GetLibrariesToPreload(List<string> libraries)
             libraries.Add("DSOffice.dll");
             libraries.Add("FunctionObject.ds");
             libraries.Add("BuiltIn.ds");
+            libraries.Add("FFITarget.dll");
             base.GetLibrariesToPreload(libraries);
         }
 
@@ -2271,6 +2272,19 @@ public void TestPackageNodeMigrationForJSONGraphs()
             // Verify all 4 nodes exist in the workspace and were properly loaded/opened from above
             Assert.AreEqual(4, this.CurrentDynamoModel.CurrentWorkspace.Nodes.Count());
         }
+
+        [Test]
+        [Category("UnitTests")]
+        public void TestZTNodeMigrationJSON_WithDifferentMethodNameAndParams()
+        {
+            var legacyGraph = Path.Combine(TestDirectory, "core","migration","TestMigrationFFIClass.dyn");
+            TestMigration(legacyGraph);
+
+            Assert.AreEqual(8, this.CurrentDynamoModel.CurrentWorkspace.Nodes.Count());
+            AssertPreviewValue("408bd6b17f7f43b28a29175bf12fb01f", "hello");
+            AssertPreviewValue("013bd08a0f574e85b1d9676ba7004990", "migrated");
+            AssertPreviewValue("df483e75085340b2a8c359a59dc8ea7a", "migrated");
+        }
         #endregion
 
         #region Private Helper Methods

test/Engine/FFITarget/ClassWithMigratedMembers.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FFITarget
+{
+    public class ClassWithMigratedMembers
+    {
+
+        public static ClassWithMigratedMembers ByNothing()
+        {
+            return new ClassWithMigratedMembers();
+        }
+
+        //we test by opening a file that references a node with three params
+        public string AMemberWithTwoParams(string a, string b)
+        {
+            return a + b;
+        }
+        public string AMemberWithThreeParams(string a, string b,string c ="abc")
+        {
+            return "migrated";
+        }
+        public string AnOverloadedMember(string a, string b)
+        {
+            return "original";
+        }
+        public string AnOverloadedMember(string a, string b, string c = "abc")
+        {
+            return "migrated";
+        }
+
+        //we test a file that uses the node AMemberWithAChangedName1
+        public string AMemberWithAChangedName2(string a)
+        {
+            return a;
+        }
+      /*  public string AMemberWithAChangedName1(string a)
+        {
+            return a;
+        }*/
+    }
+}

test/Engine/FFITarget/FFITarget.Migrations.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<migrations>
+  <priorNameHint>
+    <oldName>FFITarget.ClassWithMigratedMembers.AMemberWithAChangedName1</oldName>
+    <newName>FFITarget.ClassWithMigratedMembers.AMemberWithAChangedName2</newName>
+  </priorNameHint>
+  <priorNameHint>
+    <oldName>FFITarget.ClassWithMigratedMembers.AMemberWithTwoParams@string,string</oldName>
+    <newName>FFITarget.ClassWithMigratedMembers.AMemberWithThreeParams@string,string,string</newName>
+  </priorNameHint>
+  <priorNameHint>
+    <oldName>FFITarget.ClassWithMigratedMembers.AnOverloadedMember@string,string</oldName>
+    <newName>FFITarget.ClassWithMigratedMembers.AnOverloadedMember@string,string,string</newName>
+  </priorNameHint>
+</migrations>

test/Engine/FFITarget/FFITarget.csproj

@@ -52,6 +52,7 @@
     <Compile Include="AbstractDisposeTracert.cs" />
     <Compile Include="AtLevelTestClass.cs" />
     <Compile Include="ClassFunctionality.cs" />
+    <Compile Include="ClassWithMigratedMembers.cs" />
     <Compile Include="ClassWithRefParams.cs" />
     <Compile Include="CodeCompletionClass.cs" />
     <Compile Include="CustomLabel.cs" />
@@ -98,6 +99,11 @@
       <Private>False</Private>
     </ProjectReference>
   </ItemGroup>
+  <ItemGroup>
+    <Content Include="FFITarget.Migrations.xml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.