# This file is part of Radicale Server - Calendar Server
# Copyright © 2012-2017 Guillaume Ayoub
# Copyright © 2017-2018 Unrud <unrud@outlook.com>
#
# This library 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 library 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 Radicale.  If not, see <http://www.gnu.org/licenses/>.

"""
Rights backend that allows authenticated users to read all calendars and
address books but only grants write access to their own.

"""

import radicale.rights.authenticated as authenticated
from radicale import pathutils


class Rights(authenticated.Rights):
    def authorization(self, user, path):
        if self._verify_user and not user:
            return ""
        sane_path = pathutils.strip_path(path)
        if not sane_path:
            return "R"
        if self._verify_user:
            owned = user == sane_path.split("/", maxsplit=1)[0]
        else:
            owned = True
        if "/" not in sane_path:
            return "RW" if owned else "R"
        if sane_path.count("/") == 1:
            return "rw" if owned else "r"
        return ""