# IfcOpenShell - IFC toolkit and geometry engine

# Copyright (C) 2022 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.context

import ifcopenshell.api.geometry

import ifcopenshell.api.root

import ifcopenshell.api.unit

import ifcopenshell.util.representation

import ifcdiff

def setup_project() -> ifcopenshell.file:

ifc_file = ifcopenshell.file(schema="IFC4")

ifcopenshell.api.root.create_entity(ifc_file, ifc_class="IfcProject")

unit = ifcopenshell.api.unit.add_si_unit(ifc_file, unit_type="LENGTHUNIT", prefix="MILLI")

ifcopenshell.api.unit.assign_unit(ifc_file, units=[unit])

model = ifcopenshell.api.context.add_context(ifc_file, "Model")

ifcopenshell.api.context.add_context(ifc_file, "Model", "Body", "MODEL_VIEW", parent=model)

return ifc_file

class TestIfcDiff:

def test_add_element(self):

ifc_file = setup_project()

new_file = ifc_file.from_string(ifc_file.to_string())

wall = ifcopenshell.api.root.create_entity(new_file, ifc_class="IfcWall")

ifc_diff = ifcdiff.IfcDiff(ifc_file, new_file)

ifc_diff.diff()

assert ifc_diff.added_elements == {wall.GlobalId}

assert ifc_diff.deleted_elements == set()

assert ifc_diff.change_register == {}

def test_remove_element(self):

ifc_file = setup_project()

wall = ifcopenshell.api.root.create_entity(ifc_file, ifc_class="IfcWall")

new_file = ifc_file.from_string(ifc_file.to_string())

wall_new = new_file.by_id(wall.id())

ifcopenshell.api.root.remove_product(new_file, wall_new)

ifc_diff = ifcdiff.IfcDiff(ifc_file, new_file)

ifc_diff.diff()

assert ifc_diff.added_elements == set()

assert ifc_diff.deleted_elements == {wall.GlobalId}

assert ifc_diff.change_register == {}

def test_changed_attribute(self):

ifc_file = setup_project()

wall = ifcopenshell.api.root.create_entity(ifc_file, ifc_class="IfcWall", name="Foo")

new_file = ifc_file.from_string(ifc_file.to_string())

wall_new = new_file.by_id(wall.id())

wall_new.Name = "Bar"

ifc_diff = ifcdiff.IfcDiff(ifc_file, new_file, relationships=["attributes"])

ifc_diff.diff()

assert ifc_diff.added_elements == set()

assert ifc_diff.deleted_elements == set()

assert ifc_diff.change_register == {wall.GlobalId: {"attributes_changed": True}}

def test_changed_geometry(self):

ifc_file = setup_project()

wall = ifcopenshell.api.root.create_entity(ifc_file, ifc_class="IfcWall", name="Foo")

context = ifcopenshell.util.representation.get_context(ifc_file, "Model", "Body", "MODEL_VIEW")

assert context

representation = ifcopenshell.api.geometry.add_slab_representation(ifc_file, context, depth=0.2)

ifcopenshell.api.geometry.assign_representation(ifc_file, wall, representation)

new_file = ifc_file.from_string(ifc_file.to_string())

extrusion = new_file.by_type("IfcExtrudedAreaSolid")[0]

extrusion.Depth = 500.0

ifc_diff = ifcdiff.IfcDiff(ifc_file, new_file, relationships=["geometry"])

ifc_diff.diff()

assert ifc_diff.added_elements == set()

assert ifc_diff.deleted_elements == set()

assert ifc_diff.change_register == {wall.GlobalId: {"geometry_changed": True}}