# Re2o est un logiciel d'administration développé initiallement au rezometz. Il
# se veut agnostique au réseau considéré, de manière à être installable en
# quelques clics.
# Copyright © 2017 Gabriel Détraz
# Copyright © 2017 Goulven Kermarec
# Copyright © 2017 Augustin Lemesle
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Here are defined some functions to check acl on the application.
"""Check if an user can view the application.
user: The user who wants to view the application.
A couple (allowed, msg) where allowed is a boolean which is True if
viewing is granted and msg is a message (can be None).
return True, None