# -*- coding: utf-8 -*-
# Copyright (C) 2014-2017 <NAME> <<EMAIL>>
# Copyright (C) 2014-2017 <NAME> <<EMAIL>>
# Copyright (C) 2014-2017 <NAME> <<EMAIL>>
# Copyright (C) 2014-2017 <NAME> <<EMAIL>>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import re

from taiga.base.api.authentication import BaseAuthentication

from . import services

class Token(BaseAuthentication):
    auth_rx = re.compile(r"^Application (.+)$")

    def authenticate(self, request):
        if "HTTP_AUTHORIZATION" not in request.META:
            return None

        token_rx_match = self.auth_rx.search(request.META["HTTP_AUTHORIZATION"])
        if not token_rx_match:
            return None

        token = token_rx_match.group(1)
        user = services.get_user_for_application_token(token)

        return (user, token)

    def authenticate_header(self, request):
        return 'Bearer realm="api"'
