feat(rhino): adds user dictionary to object props (#1046)

* adds user dicts to rhino

* defaults to string value

---------

Co-authored-by: Björn <steinhagen.bjoern@gmail.com>

Connectors/Rhino/Speckle.Connectors.RhinoShared/HostApp/Properties/PropertiesExtractor.cs

@@ -1,4 +1,5 @@
 using Rhino;
+using Rhino.Collections;
 using Rhino.DocObjects;
 using Speckle.Connectors.Rhino.Mapper.Revit;
 using Speckle.Sdk;
@@ -19,7 +20,67 @@ public class PropertiesExtractor
 
   public Dictionary<string, object?> GetProperties(RhinoObject rhObject)
   {
-    Dictionary<string, object?> properties = new();
+    Dictionary<string, object?> properties = GetUserStrings(rhObject);
+
+    Dictionary<string, object?> userDict = GetUserDict(rhObject);
+    if (userDict.Count > 0)
+    {
+      properties["User Dictionary"] = userDict;
+    }
+
+    return properties;
+  }
+
+  private Dictionary<string, object?> GetUserDict(RhinoObject rhObject)
+  {
+    Dictionary<string, object?> userDict = new();
+    if (rhObject.Attributes.UserDictionary != null && rhObject.Attributes.UserDictionary.Count > 0)
+    {
+      ParseArchivableToDictionary(userDict, rhObject.Attributes.UserDictionary);
+    }
+
+    return userDict;
+  }
+
+  /// <summary>
+  /// Copies an ArchivableDictionary to a Dictionary
+  /// </summary>
+  /// <param name="target"></param>
+  /// <param name="dict"></param>
+  private void ParseArchivableToDictionary(Dictionary<string, object?> target, ArchivableDictionary dict)
+  {
+    foreach (var key in dict.Keys)
+    {
+      var obj = dict[key];
+      switch (obj)
+      {
+        case ArchivableDictionary o:
+          Dictionary<string, object?> nested = new();
+          ParseArchivableToDictionary(nested, o);
+          target[key] = nested;
+          continue;
+
+        case double:
+        case bool:
+        case int:
+        case string:
+        case IEnumerable<double>:
+        case IEnumerable<bool>:
+        case IEnumerable<int>:
+        case IEnumerable<string>:
+          target[key] = obj;
+          continue;
+
+        default:
+          target[key] = obj.ToString();
+          continue;
+      }
+    }
+  }
+
+  private Dictionary<string, object?> GetUserStrings(RhinoObject rhObject)
+  {
+    Dictionary<string, object?> userStringDict = new();
     var userStrings = rhObject.Attributes.GetUserStrings();
     foreach (string? key in userStrings.AllKeys)
     {
@@ -38,7 +99,7 @@ public class PropertiesExtractor
         if (userStrings[key]?.StartsWith("%<") ?? false)
         {
           var value = RhinoApp.ParseTextField(userStrings[key], rhObject, null);
-          properties[key] = value;
+          userStringDict[key] = value;
           continue;
         }
       }
@@ -47,19 +108,19 @@ public class PropertiesExtractor
         // Shh. We can fail silently here - it's not even worth logging. I expect users will complain properties are missing.
       }
 
-      properties[key] = userStrings[key];
+      userStringDict[key] = userStrings[key];
     }
 
     // NOTE: if no mapping was found on the object, check layer(s) recursively
-    if (!properties.ContainsKey(RevitMappingConstants.CATEGORY_USER_STRING_KEY))
+    if (!userStringDict.ContainsKey(RevitMappingConstants.CATEGORY_USER_STRING_KEY))
     {
       var layerMapping = _revitMappingResolver.SearchLayerHierarchyForMapping(rhObject);
       if (!string.IsNullOrEmpty(layerMapping))
       {
-        properties[RevitMappingConstants.CATEGORY_USER_STRING_KEY] = layerMapping;
+        userStringDict[RevitMappingConstants.CATEGORY_USER_STRING_KEY] = layerMapping;
       }
     }
 
-    return properties;
+    return userStringDict;
   }
 }