# Copyright 2016, Tresys Technology, LLC
#
# SPDX-License-Identifier: LGPL-2.1-only
#
from typing import NamedTuple, Union
from ..policyrep import PolicyEnum
from .descriptors import DiffResultDescriptor
from .difference import Difference
class ModifiedProperty(NamedTuple):
"""Difference details for a modified policy property."""
property: str
added: Union[PolicyEnum, bool, int]
removed: Union[PolicyEnum, bool, int]
class PropertiesDifference(Difference):
"""
Determine the difference in policy properties
(unknown permissions, MLS, etc.) between two policies.
"""
modified_properties = DiffResultDescriptor("diff_properties")
def diff_properties(self) -> None:
self.modified_properties = []
if self.left_policy.handle_unknown != self.right_policy.handle_unknown:
self.modified_properties.append(
ModifiedProperty("handle_unknown",
self.right_policy.handle_unknown,
self.left_policy.handle_unknown))
if self.left_policy.mls != self.right_policy.mls:
self.modified_properties.append(
ModifiedProperty("MLS",
self.right_policy.mls,
self.left_policy.mls))
if self.left_policy.version != self.right_policy.version:
self.modified_properties.append(
ModifiedProperty("version",
self.right_policy.version,
self.left_policy.version))
#
# Internal functions
#
def _reset_diff(self) -> None:
"""Reset diff results on policy changes."""
self.log.debug("Resetting property differences")
self.modified_properties = None
