Integrate ifcgroups with selector

src/ifcopenshell-python/ifcopenshell/api/group/add_group.py

@@ -24,7 +24,8 @@ class Usecase:
     def __init__(self, file, **settings):
         self.file = file
         self.settings = {
-            "Name": "Unnamed"
+            "Name": "Unnamed",
+            "Description": "",
         }
         for key, value in settings.items():
             self.settings[key] = value
@@ -36,5 +37,6 @@ class Usecase:
                 "GlobalId": ifcopenshell.guid.new(),
                 "OwnerHistory": ifcopenshell.api.run("owner.create_owner_history", self.file),
                 "Name": self.settings["Name"],
+                "Description": self.settings["Description"],
             }
         )

src/ifcopenshell-python/ifcopenshell/api/group/edit_group.py

@@ -20,7 +20,8 @@
 class Usecase:
     def __init__(self, file, **settings):
         self.file = file
-        self.settings = {"group": None, "attributes": {}}
+        self.settings = {
+            "group": None, "attributes": {}}
         for key, value in settings.items():
             self.settings[key] = value
 

src/ifcopenshell-python/ifcopenshell/api/group/update_group_products.py

@@ -0,0 +1,33 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 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 = {
+            "group": None, 
+            "products": None,
+            }
+        for key, value in settings.items():
+            self.settings[key] = value
+
+    def execute(self):
+        rel = self.settings["group"].IsGroupedBy[0]
+        rel.RelatedObjects = self.settings["products"]
+