login required middleware

middleware.py

class LoginRequiredMiddleware:
    def __init__(self, get_response: GetResponse) -> None:
        self.get_response = get_response

    def __call__(self, request: HttpRequest) -> HttpResponse:
        return self.get_response(request)

    def process_view(
        self,
        request: HttpRequest,
        view_func: ViewFunc,
        view_args: tuple[object, ...],
        view_kwargs: dict[str, object],
    ) -> HttpResponse | None:
        is_public = getattr(view_func, "is_public", False)
        if not is_public and not request.user.is_authenticated:
            return redirect_to_login(request.get_full_path())
        return None


def public(view: ViewFunc) -> ViewFunc:
    @wraps(view)
    def wrapper(*args: object, **kwargs: object) -> HttpResponse:
        return view(*args, **kwargs)

    wrapper.is_public = True  # type: ignore[attr-defined]

    return cast(ViewFunc, wrapper)