# Copyright 2015 Google Inc.
#
# 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 contextlib import contextmanager

from werkzeug.local import LocalStack


# Context-locals for the current queue.
_queue_stack = LocalStack()
current_queue = _queue_stack()


@contextmanager
def queue_context(queue):
    _queue_stack.push(queue)
    with queue.extra_context() as c:
        yield c
    _queue_stack.pop()


# Context-locals for the current task.
_task_stack = LocalStack()
current_task = _task_stack()


@contextmanager
def task_context(task):
    _task_stack.push(task)
    yield
    _task_stack.pop()
