First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# 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/>.
+
+import ifcopenshell
+import ifcopenshell.api.pset
+import ifcopenshell.util.element
+
+
+def remove_group(file: ifcopenshell.file, group: ifcopenshell.entity_instance) -> None:
+    """Removes a group
+
+    All products assigned to the group will remain, but the relationship to
+    the group will be removed.
+
+    :param group: The IfcGroup entity you want to remove
+    :return: None
+
+    Example:
+
+    .. code:: python
+
+        group = ifcopenshell.api.group.add_group(model, name="Unit 1A")
+        ifcopenshell.api.group.remove_group(model, group=group)
+    """
+    for inverse_id in [i.id() for i in file.get_inverse(group)]:
+        try:
+            inverse = file.by_id(inverse_id)
+        except:
+            continue
+        if inverse.is_a("IfcRelDefinesByProperties"):
+            ifcopenshell.api.pset.remove_pset(
+                file,
+                product=group,
+                pset=inverse.RelatingPropertyDefinition,
+            )
+        elif inverse.is_a("IfcRelAssignsToGroup"):
+            if inverse.RelatingGroup == group:
+                history = inverse.OwnerHistory
+                file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(file, history)
+            elif len(inverse.RelatedObjects) == 1:
+                history = inverse.OwnerHistory
+                file.remove(inverse)
+                if history:
+                    ifcopenshell.util.element.remove_deep2(file, history)
+    history = group.OwnerHistory
+    file.remove(group)
+    if history:
+        ifcopenshell.util.element.remove_deep2(file, history)