# Copyright 2017 AT&T Intellectual Property.  All other rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Utility classes."""
from keystoneauth1 import session
from keystoneauth1.identity import v3

import drydock_provisioner.config as config


class KeystoneUtils(object):
    """Utility methods for using Keystone."""

    @staticmethod
    def get_session():
        """Get an initialized keystone session.

        Authentication is based on the keystone_authtoken section of the config file.
        """
        auth_info = dict()
        for f in [
                'auth_url', 'username', 'password', 'project_id',
                'user_domain_name'
        ]:
            auth_info[f] = getattr(config.config_mgr.conf.keystone_authtoken,
                                   f)

        auth = v3.Password(**auth_info)
        return session.Session(auth=auth)