#2094. Removing materials now removes material definitions too for styles

src/ifcopenshell-python/ifcopenshell/api/material/add_material_set.py

@@ -0,0 +1,32 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class Usecase:
+    def __init__(self, file, **settings):
+        self.file = file
+        self.settings = {"name": "Unnamed", "set_type": "IfcMaterialConstituentSet"}
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        if self.settings["set_type"] == "IfcMaterialLayerSet":
+            return self.file.create_entity("IfcMaterialLayerSet", LayerSetName=self.settings["name"] or "Unnamed")
+        elif self.settings["set_type"] == "IfcMaterialList":
+            return self.file.create_entity("IfcMaterialList")
+        return self.file.create_entity(self.settings["set_type"], Name=self.settings["name"] or "Unnamed")