晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //opt/imunify360/venv/lib/python3.11/site-packages/defence360agent/feature_management/checkers.py
from typing import List

from copy import deepcopy

from .exceptions import FeatureDisabledError
from .constants import CONFIG_MAPPINGS
from .model import FeatureManagementPerms


def check_feature(feature: str, permissions: List[str], user: str):
    """
    Raise exception if feature is disabled for user

    :param feature: feature name
    :param permissions: permissions required
    :param user: user name
    :return: None
    :raises FeatureDisabledError: if user is prohibited from use of the feature
    """
    if user is None:
        return

    perm = FeatureManagementPerms.get_perm(user)
    permission_value = perm.get_feature(feature)

    if permission_value not in permissions:
        raise FeatureDisabledError(
            "Feature '{name}' is disabled for user '{user}'".format(
                name=feature, user=user
            )
        )


def check_config(feature: str, user: str, section: str, raise_=False):
    """
    Check if section is allowed to be read or write by user

    :param feature: feature name
    :param user: user name
    :param section: section name to check
    :param raise_: True to raise exception, otherwise return True or False
    :return: True if config sections is allowed to user, False otherwise
    :raises FeatureDisabledError: raised if raise_=True
    """
    if user is None:
        return True

    if feature not in CONFIG_MAPPINGS:
        return True

    if section not in CONFIG_MAPPINGS[feature]:
        return True

    try:
        check_feature(feature, CONFIG_MAPPINGS[feature][section], user)
    except FeatureDisabledError:
        if raise_:
            raise
        return False

    return True


def config_cleanup(data: dict, user: str = None) -> dict:
    """
    Remove prohibited sections from user config

    :param data: config data
    :param user: user name
    :return: new config data
    """
    new_data = deepcopy(data)

    for feature in CONFIG_MAPPINGS:
        for section in data:
            if not check_config(feature, user, section):
                del new_data[section]

    return new_data


def config_validation(data: dict, user: str):
    """
    Raise exception if user is making changes on prohibited sections of config

    :param data: config data
    :param user: user name
    :return: None
    :raises FeatureDisabledError: if user is prohibited
    """
    for feature in CONFIG_MAPPINGS:
        for section in data:
            check_config(feature, user, section, raise_=True)

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