add original_geometry to building in editor geometry api

src/c3nav/editor/api.py

@@ -38,6 +38,8 @@ class EditorViewSet(ViewSet):
             spaces_geom = cascaded_union([space.geometry for space in spaces.values() if space.level == 'normal'])
             holes_geom = holes_geom.intersection(spaces_geom)
             doors = section.doors.all()
+            for building in buildings:
+                building.original_geometry = building.geometry
             for obj in chain(buildings, (s for s in spaces.values() if s.level == 'normal')):
                 obj.geometry = obj.geometry.difference(holes_geom)
 

src/c3nav/mapdata/models/geometry/base.py

@@ -27,11 +27,15 @@ class GeometryMixin(EditorFormMixin):
         return result
 
     def to_geojson(self) -> dict:
-        return OrderedDict((
+        result = OrderedDict((
             ('type', 'Feature'),
             ('properties', self.get_geojson_properties()),
             ('geometry', format_geojson(mapping(self.geometry), round=False)),
         ))
+        original_geometry = getattr(self, 'original_geometry', None)
+        if original_geometry:
+            result['original_geometry'] = format_geojson(mapping(original_geometry), round=False)
+        return result
 
     @classmethod
     def serialize_type(cls, geomtype=True, **kwargs):