# Copyright 2018, Chris PeBenito <pebenito@ieee.org>
#
# SPDX-License-Identifier: LGPL-2.1-only
#
from typing import NamedTuple
from ..policyrep import Context, Ibendportcon
from .context import ContextWrapper
from .descriptors import DiffResultDescriptor
from .difference import Difference, Wrapper
class ModifiedIbendportcon(NamedTuple):
"""Difference details for a modified ibendportcon."""
rule: Ibendportcon
added_context: Context
removed_context: Context
class IbendportconsDifference(Difference):
"""Determine the difference in ibendportcons between two policies."""
added_ibendportcons = DiffResultDescriptor("diff_ibendportcons")
removed_ibendportcons = DiffResultDescriptor("diff_ibendportcons")
modified_ibendportcons = DiffResultDescriptor("diff_ibendportcons")
def diff_ibendportcons(self) -> None:
"""Generate the difference in ibendportcons between the policies."""
self.log.info(
"Generating ibendportcon differences from {0.left_policy} to {0.right_policy}".
format(self))
self.added_ibendportcons, self.removed_ibendportcons, matched_ibendportcons = \
self._set_diff(
(IbendportconWrapper(n) for n in self.left_policy.ibendportcons()),
(IbendportconWrapper(n) for n in self.right_policy.ibendportcons()))
self.modified_ibendportcons = []
for left_ibep, right_ibep in matched_ibendportcons:
# Criteria for modified ibendportcons
# 1. change to context
if ContextWrapper(left_ibep.context) != ContextWrapper(right_ibep.context):
self.modified_ibendportcons.append(
ModifiedIbendportcon(left_ibep, right_ibep.context, left_ibep.context))
#
# Internal functions
#
def _reset_diff(self) -> None:
"""Reset diff results on policy changes."""
self.log.debug("Resetting ibendportcon differences")
self.added_ibendportcons = None
self.removed_ibendportcons = None
self.modified_ibendportcons = None
class IbendportconWrapper(Wrapper[Ibendportcon]):
"""Wrap ibendportcon statements for diff purposes."""
__slots__ = ("name", "port")
def __init__(self, ocon: Ibendportcon) -> None:
self.origin = ocon
self.name = ocon.name
self.port = ocon.port
self.key = hash(ocon)
def __hash__(self):
return self.key
def __lt__(self, other):
return self.origin < other.origin
def __eq__(self, other):
return self.name == other.name and \
self.port == other.port
