WIP assigning a class now ported over to partial editing and creates an IFC element. See #1222.

src/ifcblenderexport/blenderbim/bim/module/root/assign_class.py

@@ -0,0 +1,24 @@
+import ifcopenshell
+
+
+class Usecase:
+    def __init__(self, file, settings=None):
+        self.file = file
+        self.settings = {
+            "ifc_class": "IfcBuildingElementProxy",
+            "predefined_type": None,
+            "name": None,
+        }
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        element = self.file.create_entity(self.settings["ifc_class"], **{"GlobalId": ifcopenshell.guid.new()})
+        element.Name = self.settings["name"] or None
+        if self.settings["predefined_type"] and hasattr(element, "PredefinedType"):
+            try:
+                element.PredefinedType = self.settings["predefined_type"]
+            except:
+                element.PredefinedType = "USERDEFINED"
+                element.ObjectType = self.settings["predefined_type"]
+        return element