Mini Shell

import logging
import warnings
from functools import wraps

from defence360agent.contracts import eula
from defence360agent.contracts.config import Core, UserType
from defence360agent.contracts.license import LicenseCLN
from defence360agent.contracts.messages import MessageType

logger = logging.getLogger(__name__)


def add_license(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        result = await f(*args, **kwargs)
        assert isinstance(result, dict), (
            "Result should be a dictionary %s" % result
        )
        license = LicenseCLN.license_info()
        result["license"] = license
        return result

    return wrapper


def add_license_user(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        result = await f(*args, **kwargs)
        assert isinstance(result, dict), (
            "Result should be a dictionary %s" % result
        )
        license = LicenseCLN.license_info()
        result["license"] = {
            "status": license["status"],
            "license_type": license.get("license_type"),
        }
        return result

    return wrapper


def add_eula(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        result = await f(*args, **kwargs)
        assert isinstance(result, dict), (
            "Result should be a dictionary %s" % result
        )
        eula_dict = None
        # do not show eula if not registered or using free AV version
        if LicenseCLN.is_valid() and (not LicenseCLN.is_free()):
            if not await eula.is_accepted():
                try:
                    eula_dict = {
                        "message": eula.message(),
                        "text": eula.text(),
                        "updated": eula.updated(),
                    }
                except OSError as e:
                    eula_dict = {
                        "message": "Failed to read EULA",
                        "text": "Failed to read EULA: {}".format(str(e)),
                        "updated": "",
                    }
        result["eula"] = eula_dict
        return result

    return wrapper


def add_version(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        result = await f(*args, **kwargs)
        assert isinstance(result, dict), (
            "Result should be a dictionary %s" % result
        )
        result["version"] = Core.VERSION

        return result

    return wrapper


def max_count(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        count, items = await f(*args, **kwargs)
        return {"max_count": count, "items": items}

    return wrapper


def counts(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        max_count, counts, items = await f(*args, **kwargs)
        return {"max_count": max_count, "counts": counts, "items": items}

    return wrapper


def collect_warnings(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        warnings.simplefilter("always", DeprecationWarning)
        with warnings.catch_warnings(record=True) as warns:
            result = await f(*args, **kwargs)
            result["warnings"] = [" ".join(w.message.args) for w in warns]
            return result

    return wrapper


# Need only for backward compatibility
def default_to_items(f):
    @wraps(f)
    async def wrapper(*args, **kwargs):
        result = await f(*args, **kwargs)
        if not isinstance(result, dict):
            result = {"items": result}
        return result

    return wrapper


def preserve_remote_addr(f):
    """
    This middleware copies 'remote_addr' to 'client_addr'.
    This is needed because send_command_invoke middleware may remove
    remote_addr parameter from request.
    Used for endpoints that need remote_addr in their logic.

    :param f:
    :return:
    """

    @wraps(f)
    async def wrapper(request, *args, **kwargs):
        remote_addr = request["params"].get("remote_addr")
        request["client_addr"] = remote_addr

        return await f(request, *args, **kwargs)

    return wrapper


def send_command_invoke_message(coro):
    @wraps(coro)
    async def wrapper(request, *args, **kwargs):
        # get the sink to send CommandInvoke message
        sink = None
        if args:
            sink = args[0]
        elif "sink" in kwargs:
            sink = kwargs["sink"]

        if sink is not None:
            params = dict(request["params"])
            if "user" not in params:
                # find user type (root/non-root) to determine access rights
                user_type = None
                if len(args) > 1:
                    user_type = args[1]
                elif "user" in kwargs:
                    user_type = kwargs["user"]
                if user_type == UserType.NON_ROOT:
                    params["user"] = True

            # don't send passwords
            if "password" in params:
                params["password"] = "***"

            # send message
            await sink.process_message(
                MessageType.CommandInvoke(
                    command=request["command"],
                    params=params,
                    calling_process=request.pop("calling_process", None),
                )
            )
            request["params"].pop("remote_addr", None)
        return await coro(request, *args, **kwargs)

    return wrapper