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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 typing import List, Optional, Set

from defence360agent.contracts.messages import (
    Accumulatable,
    Ack,
    Message,
    Noop,
    Lockable,
    ShortenReprListMixin,
    Reportable,
    Received,
)
from imav.malwarelib.config import MalwareScanType, QueuedScanState
from imav.malwarelib.scan.mds.report import (
    MalwareDatabaseHitInfo,
    MalwareDatabaseScanReport,
)


class MalwareScanTask(Message):
    """
    Creates task to scan file for malware
    """

    DEFAULT_METHOD = "MALWARE_SCAN_TASK"


class MalwareScanComplete(Message):
    DEFAULT_METHOD = "MALWARE_SCAN_COMPLETE"


class MalwareCleanComplete(Message):
    DEFAULT_METHOD = "MALWARE_CLEAN_COMPLETE"


class MalwareRestoreComplete(Message):
    DEFAULT_METHOD = "MALWARE_RESTORE_COMPLETE"


class MalwareScanList(ShortenReprListMixin, Message, Reportable):
    DEFAULT_METHOD = "MALWARE_SCAN_LIST"


class MalwareScan(Accumulatable, Lockable):
    """
    Represents results of single scan
    """

    DEFAULT_METHOD = "MALWARE_SCAN"
    LIST_CLASS = MalwareScanList

    def do_accumulate(self) -> bool:
        results = self.get("results")
        if self.get("summary", {}).get("type") == MalwareScanType.BACKGROUND:
            return results is not None
        return bool(results)


class MalwareMRSUpload(Message):
    """
    Used to isolate a possibly long running uploading to MRS from the
    other MalwareScan handlers.
    """

    DEFAULT_METHOD = "MALWARE_MRS_UPLOAD"


class MalwareScanQueue(Message):
    DEFAULT_METHOD = "MALWARE_SCAN_QUEUE"


class MalwareScanQueuePut(MalwareScanQueue):
    def __init__(self, *, paths, scan_args):
        super().__init__(paths=paths, scan_args=scan_args)


class MalwareScanQueueRemove(MalwareScanQueue):
    def __init__(self, *, scan_ids):
        super().__init__(scan_ids=scan_ids)


class MalwareScanQueueRecheck(MalwareScanQueue):
    def __init__(self):
        super().__init__()


class MalwareScanQueueStopBackground(MalwareScanQueue):
    def __init__(self):
        super().__init__()


class MalwareScanQueueUpdateStatus(MalwareScanQueue):
    def __init__(
        self, *, scan_ids: List[str] = None, status: QueuedScanState = None
    ):
        super().__init__(scan_ids=scan_ids, status=status)


class MalwareResponse(Message, Received):
    TYPES = BLACK, WHITE, KNOWN, UNKNOWN = "BLACK", "WHITE", "KNOWN", "UNKNOWN"
    DEFAULT_METHOD = "MALWARE_RESPONSE"


class MalwareSendFiles(Message, Received):
    DEFAULT_METHOD = "MALWARE_SEND_FILES"


class MalwareRescanFiles(Message, Received):
    DEFAULT_METHOD = "MALWARE_RESCAN_FILES"


class MalwareCleanupTask(Message):
    """
    Creates task to cleanup files
    """

    DEFAULT_METHOD = "MALWARE_CLEANUP_TASK"

    def __init__(
        self,
        *,
        hits,
        standard_only=None,
        cause=None,
        initiator=None,
        scan_id=None,
        post_action=None,
    ):
        super().__init__(
            hits=hits,
            standard_only=standard_only,
            cause=cause,
            initiator=initiator,
            scan_id=scan_id,
            post_action=post_action,
        )


class MalwareCleanupList(ShortenReprListMixin, Message, Reportable):
    DEFAULT_METHOD = "MALWARE_CLEANUP_LIST"


class MalwareCleanup(Accumulatable):
    """
    Represents results of single cleanup
    """

    DEFAULT_METHOD = "MALWARE_CLEANUP"
    LIST_CLASS = MalwareCleanupList


class MalwareIgnorePathUpdated(Message):
    """Signal through a message bus that MalwareIgnorePath has been updated."""

    pass


class MalwareDatabaseScan(Message):
    """
    Represents results of a single MDS scan
    """

    args: Optional[List[str]]
    path: str
    scan_id: str
    type: str
    error: Optional[str]
    started: int
    completed: int
    total_resources: int
    total_malicious: int
    hits: Set[MalwareDatabaseHitInfo]
    initiator: Optional[str]

    def __init__(
        self,
        *,
        args: Optional[List[str]],
        path: Optional[str],
        scan_id: str,
        type: str,
        started: int = 0,
        completed: int = 0,
        total_resources: int = 0,
        total_malicious: int = 0,
        hits: Set[MalwareDatabaseHitInfo] = None,
        error: Optional[str] = None,
        initiator: Optional[str] = None,
    ):
        super().__init__(
            args=args,
            path=path,
            scan_id=scan_id,
            type=type,
            started=started,
            completed=completed,
            total_resources=total_resources,
            total_malicious=total_malicious,
            hits=hits,
            error=error,
            initiator=initiator,
        )

    def update_with_report(self, report: MalwareDatabaseScanReport):
        self.update(
            started=report.started,
            completed=report.completed,
            total_resources=report.total_resources,
            total_malicious=report.total_malicious,
            hits=report.hits,
        )

    def update_with_error(self, message):
        return self.update(error=message)

    def __setitem__(self, key, value):
        raise NotImplementedError

    def __delitem__(self, key):
        raise NotImplementedError


class MalwareDatabaseRestore(Message):
    """
    Represents results of a single MDS restore
    """


class MalwareDatabaseRestoreTask(Message):
    """
    Represents a single MDS restore task
    """

    path: str
    app_name: str

    def __init__(self, path: str, app_name: str):
        super().__init__(path=path, app_name=app_name)


class MalwareDatabaseCleanup(Message):
    """
    Represents results of a single mds cleanup
    """

    succeeded: Set[MalwareDatabaseHitInfo]
    failed: Set[MalwareDatabaseHitInfo]

    def __init__(
        self,
        succeeded: Set[MalwareDatabaseHitInfo],
        failed: Set[MalwareDatabaseHitInfo],
    ):
        super().__init__(
            succeeded=succeeded,
            failed=failed,
        )


class MalwareDatabaseCleanupFailed(Message):
    """
    Signifies an MDS cleanup failure
    """

    error: str

    def __init__(self, *, error: str):
        super().__init__(error=error)


class MalwareDatabaseRestoreFailed(Message):
    """
    Signifies an MDS restore failure
    """

    error: str

    def __init__(self, *, error: str):
        super().__init__(error=error)


class MalwareCleanupRevertList(ShortenReprListMixin, Message, Reportable):
    DEFAULT_METHOD = "MALWARE_CLEANUP_REVERT_LIST"


class MalwareCleanupRevert(Accumulatable):
    LIST_CLASS = MalwareCleanupRevertList


MSGS_WITHOUT_IP = [
    msg.DEFAULT_METHOD
    for msg in (
        Ack,
        MalwareScan,
        MalwareScanList,
        MalwareScanComplete,
        MalwareCleanComplete,
        MalwareRestoreComplete,
        Noop,
    )
]
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