append_asset - check unique styles based on their name #6269

src/ifcopenshell-python/ifcopenshell/api/project/append_asset.py

@@ -525,6 +525,7 @@ class Usecase:
         if added_element := reuse_identities.get(element_identity):
             return added_element
 
+        ifc_class = element.is_a()
         attributes_ = None
 
         def get_attributes() -> tuple[W.attribute, ...]:
@@ -550,6 +551,13 @@ class Usecase:
             if existing_material is not None:
                 reuse_identities[element_identity] = existing_material
                 return existing_material
+        elif element.is_a("IfcPresentationStyle"):
+            style_name = element.Name
+            if style_name is not None:
+                existing_style = next((e for e in ifc_file.by_type(ifc_class) if e.Name == style_name), None)
+                if existing_style is not None:
+                    reuse_identities[element_identity] = existing_style
+                    return existing_style
 
         attrs = {}
 
@@ -598,7 +606,7 @@ class Usecase:
             attrs[attr_index] = attr_value
 
         # Adding entity at the end just to keep it consistent with `file.add`.
-        new = ifc_file.create_entity(element.is_a())
+        new = ifc_file.create_entity(ifc_class)
         reuse_identities[element_identity] = new
         for attr_index, attr_value in attrs.items():
             new[attr_index] = attr_value