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Current File : /opt/imunify360/venv/lib/python3.11/site-packages/defence360agent/subsys/backup_systems.py
import asyncio
import functools
import logging
from datetime import timezone
from typing import Callable, Dict, List, Optional

from defence360agent.contracts.config import (
    ACRONIS,
    ANTIVIRUS_MODE,
    AcronisBackup as AcronisBackupConfig,
    BackupConfig,
    BackupRestore,
    CLOUDLINUX,
    CLOUDLINUX_ON_PREMISE,
    CLUSTERLOGICS,
    CPANEL,
    Core,
    DIRECTADMIN,
    PLESK,
    R1SOFT,
    SAMPLE_BACKEND,
)
from defence360agent.contracts.license import LicenseCLN
from defence360agent.internals.cln import BackupNotFound, RestCLN
from defence360agent.subsys.panels.cpanel.panel import cPanel
from defence360agent.subsys.panels.directadmin.panel import DirectAdmin
from defence360agent.subsys.panels.plesk.panel import Plesk

if not ANTIVIRUS_MODE:
    from restore_infected import backup_backends
    from restore_infected.backup_backends.acronis import BackupFailed
    from restore_infected.backup_backends_lib import (
        BackendNonApplicableError,
        BackendNotAuthorizedError,
    )

logger = logging.getLogger(__name__)


def get_backend(name):
    try:
        return _get_avalible_backends(include_sample=True)[name]()
    except (KeyError, BackendNonApplicableError):
        raise ValueError("Backup system is not available: {}".format(name))


def get_available_backends_names() -> List[str]:
    names = []
    # Don't list the CL Backup as available for selection
    for name, cls in _get_avalible_backends(include_cl=False).items():
        try:
            cls()
        except BackendNonApplicableError:
            pass
        else:
            names.append(name)

    return names


def _get_avalible_backends(
    include_sample=False,
    include_cl=True,
) -> Dict[str, Callable]:
    backends = {
        ACRONIS: Acronis,
        R1SOFT: R1Soft,
        # https://cloudlinux.atlassian.net/browse/DEF-8806
        # CLUSTERLOGICS: ClusterLogics,
    }
    if BackupRestore.CL_BACKUP_ALLOWED and include_cl:
        backends[CLOUDLINUX] = CloudLinux
    if BackupRestore.CL_ON_PREMISE_BACKUP_ALLOWED:
        backends[CLOUDLINUX_ON_PREMISE] = CloudLinuxOnPremise
    if cPanel.is_installed():
        backends[CPANEL] = cPanelBackup
    elif Plesk.is_installed():
        backends[PLESK] = PleskBackup
    elif DirectAdmin.is_installed():
        backends[DIRECTADMIN] = DirectAdminBackup
    if include_sample:
        backends[SAMPLE_BACKEND] = Sample

    return backends


def get_current_backend() -> Optional[str]:
    conf = BackupConfig().config_to_dict().get("BACKUP_SYSTEM", {})
    return conf.get("enabled") and conf.get("backup_system")


async def get_last_backup_timestamp() -> Optional[int]:
    backend = get_current_backend()
    if not backend:
        return None

    backend_instance = get_backend(backend)  # type: BackupSystem
    return await backend_instance.get_last_backup_timestamp()


def transactional(f):
    async def wrapper(cls, *args, **kwargs):
        ok = False
        try:
            rv = await f(cls, *args, **kwargs)
            ok = True
        finally:
            cls._update_backups_config(enabled=ok)
        return rv

    return wrapper


class BackupException(Exception):
    pass


class BackupSystem:
    def __init__(self, name, log_path=None):
        self.name = name
        self.log_path = log_path

    def _update_backups_config(self, enabled):
        new_conf = {
            "BACKUP_SYSTEM": {
                "enabled": enabled,
                "backup_system": self.name if enabled else None,
            }
        }
        BackupConfig().dict_to_config(new_conf, overwrite=True, validate=True)

    async def init(self, *args, **kwargs):
        self._update_backups_config(enabled=True)

    async def disable(self, delete_backups=False):
        self._update_backups_config(enabled=False)

    async def check(self):
        return {}

    async def show(self):
        return {}

    async def make_backup(self):
        pass

    async def check_state(self) -> bool:
        conf = BackupConfig().config_to_dict().get("BACKUP_SYSTEM", {})
        return conf.get("enabled") and conf.get("backup_system") == self.name

    async def get_last_backup_timestamp(self) -> Optional[int]:
        return None


class PleskBackup(BackupSystem):
    def __init__(self):
        super().__init__(PLESK)


class cPanelBackup(BackupSystem):
    def __init__(self):
        super().__init__(CPANEL)


class DirectAdminBackup(BackupSystem):
    def __init__(self):
        super().__init__(DIRECTADMIN)


class R1Soft(BackupSystem):
    def __init__(self):
        super().__init__(R1SOFT)
        self.backend = backup_backends.backend("r1soft", async_=True)

    async def show(self) -> dict:
        info_data = await self.backend.info()
        return {
            k: v
            for k, v in info_data.items()
            if k in ("username", "timestamp", "ip")
        }

    @transactional
    async def init(self, ip, username, password, encryption_key, **kwargs):
        await self.backend.init(ip, username, password, encryption_key)


class ClusterLogics(BackupSystem):
    def __init__(self):
        super().__init__(CLUSTERLOGICS)
        self.backend = backup_backends.backend(CLUSTERLOGICS, async_=True)

    async def show(self) -> dict:
        info_data = await self.backend.info()
        return {
            k: v
            for k, v in info_data.items()
            if k in ("username", "url", "apikey")
        }

    @transactional
    async def init(self, **kwargs):
        # 'force' argument (for arconis only) has default value
        # also, need to use default value for 'url',
        # assigned inside backend.init
        del kwargs["force"]
        await self.backend.init(**kwargs)


class Sample(BackupSystem):
    def __init__(self):
        super().__init__(SAMPLE_BACKEND)
        self.backend = backup_backends.backend(self.name, async_=True)


class Acronis(BackupSystem):
    def __init__(self):
        super().__init__(
            ACRONIS,
            "/var/log/%s/%s" % (Core.PRODUCT, AcronisBackupConfig.LOG_NAME),
        )
        self.backend = backup_backends.backend(self.name, async_=True)

    async def show(self) -> dict:
        info_data = await self.backend.info()
        return {
            k: v
            for k, v in info_data.items()
            if k in ("username", "timestamp")
        }

    @transactional
    async def init(self, username, password, force=False, **kwargs):
        provision = not await self.backend.is_agent_installed()
        await self.backend.init(
            username,
            password,
            provision=provision,
            force=force,
            tmp_dir=Core.TMPDIR,
        )

    async def _list_backups(self, until=None):
        return await self.backend.backups(until)

    async def get_last_backup_timestamp(self) -> Optional[int]:
        backups = await self._list_backups()
        if backups:
            return int(
                max(
                    backup.created.replace(tzinfo=timezone.utc).timestamp()
                    for backup in backups
                )
            )
        return None

    async def check_state(self) -> bool:
        """if backup exists, than state OK"""
        try:
            return bool(await self._list_backups())
        except (asyncio.CancelledError, BackendNotAuthorizedError):
            raise
        except Exception:
            logger.exception("Error during checking state")
            return False


class CloudLinuxBase(Acronis):
    async def show(self) -> dict:
        info_data = await self.backend.info()
        info_data["backup_space_used_bytes"] = info_data.pop("usage")
        info_data["login_url"] = await self.backend.login_url()
        return info_data

    async def make_backup(self):
        logger.info("Making backup")
        try:
            await self.backend.make_initial_backup_strict()
        except BackupFailed as e:
            logging.exception("CloudLinux backup failed")
            raise BackupException(
                str(e) if len(e.args) and e.args[0] else "BackupFailed"
            )

    async def get_backup_progress(self) -> Optional[int]:
        return await self.backend.get_backup_progress()

    async def init(self, username, password, force=False, **kwargs):
        logger.info("Starting %s init" % self.name)
        provision = not await self.backend.is_agent_installed()
        await self.backend.init(
            username,
            password,
            provision=provision,
            force=force,
            tmp_dir=Core.TMPDIR,
        )


class CloudLinux(CloudLinuxBase):
    PAID, UNPAID = "paid", "unpaid"

    def __init__(self):
        super().__init__()
        self.name = CLOUDLINUX

    @transactional
    async def init(self, force=False, **kwargs):
        credentials = await RestCLN.acronis_credentials(
            server_id=LicenseCLN.get_server_id()
        )
        await super().init(
            credentials["login"],
            credentials["password"],
            force=force,
        )

    class Decorators:
        @staticmethod
        def update_credentials_on_unauthorized_error(f):
            @functools.wraps(f)
            async def wrapped(self, *args, **kwargs):
                try:
                    return await f(self, *args, **kwargs)
                except BackendNotAuthorizedError:
                    await self.init(force=True)
                    return await f(self, *args, **kwargs)

            return wrapped

    @Decorators.update_credentials_on_unauthorized_error
    async def show(self) -> dict:
        info_data = await super().show()
        # FIXME: raise exception when server_id is None
        response = await RestCLN.acronis_check(
            server_id=LicenseCLN.get_server_id()
        )
        purchased_backup_gb = response.get("size", 0)
        resize_url = response.get("url", None)

        info_data["purchased_backup_gb"] = purchased_backup_gb
        info_data["resize_url"] = resize_url

        return info_data

    @Decorators.update_credentials_on_unauthorized_error
    async def make_backup(self):
        await super().make_backup()

    @Decorators.update_credentials_on_unauthorized_error
    async def get_backup_progress(self) -> Optional[int]:
        return await super().get_backup_progress()

    @Decorators.update_credentials_on_unauthorized_error
    async def get_last_backup_timestamp(self) -> Optional[int]:
        return await super().get_last_backup_timestamp()

    @Decorators.update_credentials_on_unauthorized_error
    async def check_state(self) -> bool:
        return await super().check_state()

    async def check(self) -> dict:
        try:
            content = await RestCLN.acronis_check(
                server_id=LicenseCLN.get_server_id()
            )
        except BackupNotFound as e:
            return {"status": self.UNPAID, "url": e.add_used_space()}

        return {"status": self.PAID, "size": content.get("size")}

    async def disable(self, delete_backups=False):
        await super().disable()
        if delete_backups:
            await RestCLN.acronis_remove(server_id=LicenseCLN.get_server_id())


class CloudLinuxOnPremise(CloudLinuxBase):
    def __init__(self):
        super().__init__()
        self.name = CLOUDLINUX_ON_PREMISE

    @transactional
    async def init(self, *args, **kwargs):
        await super().init(*args, **kwargs)

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