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import logging
import datetime
from typing import List

from defence360agent.utils import timed_cache
from defence360agent.subsys.panels.cpanel.whm import WHMAPIException, whmapi1

logger = logging.getLogger(__name__)


class PackageNotExistError(WHMAPIException):
    pass


class PkgInfo(dict):
    def extensions(self) -> List[str]:
        return self.get("_PACKAGE_EXTENSIONS", "").split()

    def has_extension(self, name: str) -> bool:
        return name in self.extensions()

    def name(self) -> str:
        return self["name"]


@timed_cache(datetime.timedelta(seconds=90), maxsize=100)
async def get_package_info(name: str) -> PkgInfo:
    try:
        data = await whmapi1("getpkginfo", pkg=name)
    except WHMAPIException as e:
        if "No such file or directory" in str(e):
            raise PackageNotExistError(e)
        else:
            raise
    info = PkgInfo(data["pkg"])
    info["name"] = name
    return info


async def list_packages(want="all") -> List[PkgInfo]:
    data = await whmapi1("listpkgs", want=want)
    return [PkgInfo(item) for item in data["pkg"]]


async def remove_extension(extension_name: str, package_info: PkgInfo) -> None:
    """Removes extension from a package described by package_info."""
    name = package_info.name()
    if package_info.has_extension(extension_name):
        await whmapi1(
            "delpkgext", name=name, _DELETE_EXTENSIONS=extension_name
        )
        logger.info(
            "Extension %s disabled for package %s", extension_name, name
        )
        return
    logger.info(
        "Extension %s was already disabled for package %s",
        extension_name,
        name,
    )


async def add_extension(
    extension_name: str, package_info: PkgInfo, **kwargs
) -> None:
    """Adds extension to a package described by package_info.

    kwargs holds extra variables to set for the extension."""
    name = package_info.name()
    if not package_info.has_extension(extension_name):
        await whmapi1(
            "addpkgext",
            name=name,
            _PACKAGE_EXTENSIONS=extension_name,
            **kwargs
        )
        logger.info(
            "Extension %s enabled for package %s", extension_name, name
        )
        return
    logger.info(
        "Extension %s was already enabled for package %s", extension_name, name
    )


async def add_extension_for_all(extension_name: str, **kwargs) -> None:
    """Add given extension to all cPanel packages."""
    for pkg in await list_packages():
        try:
            await add_extension(extension_name, pkg, **kwargs)
        except WHMAPIException:
            logger.exception(
                "Unable to add extension %s to package %s",
                extension_name,
                pkg["name"],
            )


async def remove_extension_from_all(extension_name: str) -> None:
    """Remove given extension from all cPanel packages."""
    for pkg in await list_packages():
        try:
            await remove_extension(extension_name, pkg)
        except WHMAPIException:
            logger.exception(
                "Unable to remove extension %s from package %s",
                extension_name,
                pkg["name"],
            )
    logger.info(
        "Imunify360 package extensions have been removed from all packages."
    )
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