First Commit

2026-05-31 10:17:09 +07:00
commit 17a9c69379
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+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021-2022, Dion Moult <dion@thinkmoult.com>, Yassine Oualid <yassine@sigmadimensions.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.resource
+import ifcopenshell.util.element
+
+
+def remove_resource(file: ifcopenshell.file, resource: ifcopenshell.entity_instance) -> None:
+    """Removes a resource and all relationships
+
+    Example:
+
+    .. code:: python
+
+        # Add our own crew
+        crew = ifcopenshell.api.resource.add_resource(model, ifc_class="IfcCrewResource")
+
+        # Fire our crew
+        ifcopenshell.api.resource.remove_resource(model, resource=crew)
+    """
+    settings = {"resource": resource}
+
+    def remove_consider_history(root: ifcopenshell.entity_instance) -> None:
+        history = root.OwnerHistory
+        file.remove(root)
+        if history:
+            ifcopenshell.util.element.remove_deep2(file, history)
+
+    # TODO: review deep purge
+    for inverse in file.get_inverse(settings["resource"]):
+        if inverse.is_a("IfcRelNests"):
+            if inverse.RelatingObject == settings["resource"]:
+                # Remove rel before iteration over objects
+                # to simplify removal of nested resources and avoid crashes.
+                related_objects = inverse.RelatedObjects
+                remove_consider_history(inverse)
+                for related_object in related_objects:
+                    ifcopenshell.api.resource.remove_resource(file, resource=related_object)
+            elif inverse.RelatedObjects == (resource,):
+                remove_consider_history(inverse)
+
+        elif inverse.is_a("IfcRelAssignsToControl"):
+            if len(inverse.RelatedObjects) == 1:
+                remove_consider_history(inverse)
+            else:
+                related_objects = list(inverse.RelatedObjects)
+                related_objects.remove(settings["resource"])
+                inverse.RelatedObjects = related_objects
+        elif inverse.is_a("IfcRelAssignsToResource"):
+            if inverse.RelatingResource == settings["resource"]:
+                for related_object in inverse.RelatedObjects:
+                    ifcopenshell.api.resource.unassign_resource(
+                        file, related_object=related_object, relating_resource=settings["resource"]
+                    )
+            elif inverse.RelatedObjects == (resource,):
+                remove_consider_history(inverse)
+    # Usage was added in IFC4.
+    if usage := getattr(settings["resource"], "Usage", None):
+        file.remove(usage)
+    if settings["resource"].BaseQuantity:
+        ifcopenshell.api.resource.remove_resource_quantity(file, resource=settings["resource"])
+    remove_consider_history(resource)