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IfcOpenShell/src/ifcopenshell-python/ifcopenshell/api/cost/add_cost_item.py
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Python

# 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.api.root
import ifcopenshell.api.nest
import ifcopenshell.api.owner
import ifcopenshell.guid
from typing import Optional
def add_cost_item(
file: ifcopenshell.file,
cost_schedule: Optional[ifcopenshell.entity_instance] = None,
cost_item: Optional[ifcopenshell.entity_instance] = None,
) -> ifcopenshell.entity_instance:
"""Add a new cost item
A cost item represents a single line item in a cost schedule. Cost items
may then be broken down into cost subitems.
Either `cost_schedule` or `cost_item` must be provided.
:param cost_schedule: If the cost item is to be added as a root or top
level cost item to a cost schedule, the IfcCostSchedule may be
specified. This is mutually exlclusive to the cost_item parameter.
:type cost_schedule: ifcopenshell.entity_instance, optional.
:param cost_item: If the cost item is to be added as a subitem to an
existing cost item, the parent IfcCostItem may be specified. This is
mutually exclusive to the cost_schedule parameter.
:type cost_item: ifcopenshell.entity_instance, optional
:return: The newly created IfcCostItem
:rtype: ifcopenshell.entity_instance
Example:
.. code:: python
# The very first cost item must be in a cost schedule
schedule = ifcopenshell.api.cost.add_cost_schedule(model)
# You may add cost items as top level item in the schedule
item1 = ifcopenshell.api.cost.add_cost_item(model, cost_schedule=schedule)
# Alternatively you may add them as subitems
item2 = ifcopenshell.api.cost.add_cost_item(model, cost_item=item1)
"""
settings = {"cost_schedule": cost_schedule, "cost_item": cost_item}
cost_item = ifcopenshell.api.root.create_entity(file, ifc_class="IfcCostItem")
if settings["cost_schedule"]:
file.create_entity(
"IfcRelAssignsToControl",
**{
"GlobalId": ifcopenshell.guid.new(),
"OwnerHistory": ifcopenshell.api.owner.create_owner_history(file),
"RelatedObjects": [cost_item],
"RelatingControl": settings["cost_schedule"],
},
)
elif settings["cost_item"]:
ifcopenshell.api.nest.assign_object(
file, related_objects=[cost_item], relating_object=settings["cost_item"]
)
return cost_item