#Copyright (c) 2009 Mikhail Panchenko
#MIT License http://www.opensource.org/licenses/mit-license.php

def userRequired(fn):
    """decorator for forcing a login"""
    def new(*args, **kws):
        user = users.get_current_user()
        if not (user):
            r = args[0]
            return HttpResponseRedirect(users.create_login_url(
                                            r.build_absolute_uri()))
        else:
            return fn(*args, **kws)
    return new