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https://github.com/IfcOpenShell/IfcOpenShell.git
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Dion Moult
80 lines
3.3 KiB
Python
80 lines
3.3 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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import ifcopenshell
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import ifcopenshell.api
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import ifcopenshell.util.element
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class Usecase:
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def __init__(self, file, relating_product=None, related_object=None):
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"""Unassigns a product and object relationship
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See ifcopenshell.api.sequence.assign_product for details.
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:param relating_product: The IfcProduct in the relationship.
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:type relating_product: ifcopenshell.entity_instance.entity_instance
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:param related_object: The IfcTask in the relationship.
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:type related_object: ifcopenshell.entity_instance.entity_instance
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:return: None
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:rtype: None
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Example:
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.. code:: python
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# Let's imagine we are creating a construction schedule. All tasks
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# need to be part of a work schedule.
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schedule = ifcopenshell.api.run("sequence.add_work_schedule", model, name="Construction Schedule A")
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# Let's create a construction task. Note that the predefined type is
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# important to distinguish types of tasks.
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task = ifcopenshell.api.run("sequence.add_task", model,
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work_schedule=schedule, name="Build wall", identification="A", predefined_type="CONSTRUCTION")
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# Let's say we have a wall somewhere.
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wall = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcWall")
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# Let's construct that wall!
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ifcopenshell.api.run("sequence.assign_product", relating_product=wall, related_object=task)
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# Change our mind.
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ifcopenshell.api.run("sequence.unassign_product", relating_product=wall, related_object=task)
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"""
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self.file = file
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self.settings = {
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"relating_product": relating_product,
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"related_object": related_object,
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}
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def execute(self):
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for rel in self.settings["related_object"].HasAssignments or []:
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if not rel.is_a("IfcRelAssignsToProduct") or rel.RelatingProduct != self.settings["relating_product"]:
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continue
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if len(rel.RelatedObjects) == 1:
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history = rel.OwnerHistory
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self.file.remove(rel)
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if history:
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ifcopenshell.util.element.remove_deep2(self.file, history)
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return
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related_objects = list(rel.RelatedObjects)
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related_objects.remove(self.settings["related_object"])
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rel.RelatedObjects = related_objects
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ifcopenshell.api.run("owner.update_owner_history", self.file, element=rel)
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return rel
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