Module supertokens_python.async_to_sync_wrapper

# Copyright (c) 2021, VRAI Labs and/or its affiliates. All rights reserved.
#
# This software is licensed under the Apache License, Version 2.0 (the
# "License") as published by the Apache Software Foundation.
#
# 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.

import asyncio
from typing import Any, Coroutine, TypeVar
from os import getenv

_T = TypeVar("_T")


def nest_asyncio_enabled():
    return getenv("SUPERTOKENS_NEST_ASYNCIO", "") == "1"


def create_or_get_event_loop() -> asyncio.AbstractEventLoop:
    try:
        return asyncio.get_event_loop()
    except Exception as ex:
        if "There is no current event loop in thread" in str(ex):
            loop = asyncio.new_event_loop()

            if nest_asyncio_enabled():
                import nest_asyncio  # type: ignore

                nest_asyncio.apply(loop)  # type: ignore

            asyncio.set_event_loop(loop)
            return loop
        raise ex


def sync(co: Coroutine[Any, Any, _T]) -> _T:
    loop = create_or_get_event_loop()
    return loop.run_until_complete(co)