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"""
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Copyright © 2019 Cloud Linux Software Inc.
This software is also available under ImunifyAV commercial license,
see <https://www.imunify360.com/legal/eula>
"""
from functools import partial
from typing import Dict
from defence360agent.api import inactivity
from defence360agent.contracts.messages import MessageType
from defence360agent.contracts.plugins import (
MessageSink,
MessageSource,
expect,
)
from imav.malwarelib.config import MalwareHitStatus
from imav.malwarelib.model import MalwareHit
from imav.malwarelib.subsys.malware import MalwareAction
from defence360agent.utils import Scope
from imav.malwarelib.subsys.malware import MalwareActionIm360
_group_by_status = partial(MalwareHit.group_by_attribute, attribute="status")
class RestoreFromBackupPlugin(MessageSink, MessageSource):
"""A plugin that handles RestoreFromBackupTask messages."""
SCOPE = Scope.IM360
def __init__(self):
self._loop, self._sink = None, None
async def create_sink(self, loop):
self._loop = loop
async def create_source(self, loop, sink):
self._sink = sink
@expect(MessageType.RestoreFromBackupTask)
async def restore_from_backup(self, message: Dict):
"""Restores hits in RestoreFromBackupTask message from backup.
- sets restore_from_backup_started status for received hits in
the database.
- successfully restored files are removed from the database.
- statuses in the database are reverted from
restore_from_backup_started to its original value for files that
failed to restore.
"""
hits = message.get("hits")
if not hits:
return
initiator = message.get("initiator")
MalwareHit.set_status(
hits, MalwareHitStatus.RESTORE_FROM_BACKUP_STARTED
)
with inactivity.track.task("restore_from_backup"):
to_restore = {}
to_restore.setdefault(initiator, []).extend(hits)
restored, failed = [], []
for initiator, init_hits in to_restore.items():
results = await MalwareAction.restore_from_backup(
hits=init_hits,
initiator=initiator,
sink=self._sink,
)
restored.extend(
[hit for hit, event in results.items() if event.successful]
)
failed.extend(
[
hit
for hit, event in results.items()
if not event.successful
]
)
MalwareHit.delete_instances(restored)
original_status = _group_by_status(failed)
for status, failed_hits in original_status.items():
MalwareHit.set_status(failed_hits, status)