#!/usr/bin/env python
#
# Copyright (C) 2016 GNS3 Technologies Inc.
#
# 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 <http://www.gnu.org/licenses/>.

import os
import aiohttp

from ..config import Config


def check_path_allowed(path):
    """
    If the server is non local raise an error if
    the path is outside project directories

    Raise a 403 in case of error
    """

    config = Config.instance().get_section_config("Server")
    project_directory = config.get("project_directory")

    if len(os.path.commonprefix([project_directory, path])) == len(project_directory):
        return

    if config.getboolean("local") is False:
        raise aiohttp.web.HTTPForbidden(text="The path is not allowed")