# -*- coding: utf-8 -*-
# !/usr/bin/env python

from typing import Callable, TYPE_CHECKING

from blinker import Namespace

_signals = Namespace()

post_updated = _signals.signal('post_updated')

if TYPE_CHECKING:
    from blinker import Signal

def handler(event):
    # type:(Signal)->Callable[object, object]
    """Signal decorator to allow use of callback functions as class decorators."""

    def decorator(fn):
        def call(cls):
            event.connect(fn, sender=cls)
            return cls

        fn.call = call
        return fn

    return decorator



def post_updated_handler(sender, document, **kwargs):
    print sender
    print document