Add ability to map representations. See #1222.

src/ifcblenderexport/blenderbim/bim/module/geometry/remove_representation.py

@@ -14,4 +14,23 @@ class Usecase:
                 [self.file.remove(s) for s in subelement.StyledByItem]
             elif subelement.is_a("IfcRepresentation"):
                 subelement.ContextOfItems = dummy_context
+                self.purge_representation_inverses(subelement)
+        self.purge_representation_inverses(self.settings["representation"])
         ifcopenshell.util.element.remove_deep(self.file, self.settings["representation"])
+
+    def purge_representation_inverses(self, element):
+        for inverse in self.file.get_inverse(element):
+            if inverse.is_a("IfcPresentationLayerAssignment"):
+                assigned_items = set(inverse.AssignedItems)
+                if len(assigned_items) == 1:
+                    self.file.remove(inverse)
+                else:
+                    assigned_items.remove(element)
+                    inverse.AssignedItems == list(assigned_items)
+            elif inverse.is_a("IfcProductRepresentation"):
+                representations = set(inverse.Representations)
+                if len(representations) == 1:
+                    self.file.remove(inverse)
+                else:
+                    representations.remove(element)
+                    inverse.Representations = list(representations)