# Copyright 2017-present Open Networking Foundation
#
# 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.


from threading import local

_active = local()


def get_request():
    if not hasattr(_active, "request"):
        raise Exception(
            "Please add 'core.middleware.GlobalRequestMiddleware' to <XOS_DIR>/xos.settings.py:MIDDLEWARE_CLASSES"
        )
    return _active.request


class GlobalRequestMiddleware(object):
    def process_view(self, request, view_func, view_args, view_kwargs):
        _active.request = request
        return None