def channel_session_user(func):
    """
    Presents a message.user attribute obtained from a user ID in the channel
    session, rather than in the http_session. Turns on channel session implicitly.
    """
    @channel_session
    @functools.wraps(func)
    def inner(message, *args, **kwargs):
        # If we didn't get a session, then we don't get a user
        if not hasattr(message, "channel_session"):
            raise ValueError("Did not see a channel session to get auth from")
        if message.channel_session is None:
            message.user = AnonymousUser()
        # Otherwise, be a bit naughty and make a fake Request with just
        # a "session" attribute (later on, perhaps refactor contrib.auth to
        # pass around session rather than request)
        else:
            fake_request = type("FakeRequest", (object, ), {"session": message.channel_session})
            message.user = auth.get_user(fake_request)
        # Run the consumer
        return func(message, *args, **kwargs)
    return inner
dataset/ETHPy150Open andrewgodwin/channels/channels/auth.py/channel_session_user/original