Sith/api/views/__init__.py

# -*- coding:utf-8 -*
#
# Copyright 2016,2017
# - Skia <skia@libskia.so>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a published by the Free Software
# Foundation; either version 3 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 Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#

from rest_framework.response import Response
from rest_framework import viewsets
from django.core.exceptions import PermissionDenied
from rest_framework.decorators import detail_route
from django.db.models.query import QuerySet

from core.views import can_view, can_edit


def check_if(obj, user, test):
    """
        Detect if it's a single object or a queryset
        aply a given test on individual object and return global permission
    """
    if isinstance(obj, QuerySet):
        for o in obj:
            if test(o, user) is False:
                return False
        return True
    else:
        return test(obj, user)


class ManageModelMixin:
    @detail_route()
    def id(self, request, pk=None):
        """
            Get by id (api/v1/router/{pk}/id/)
        """
        self.queryset = get_object_or_404(self.queryset.filter(id=pk))
        serializer = self.get_serializer(self.queryset)
        return Response(serializer.data)


class RightModelViewSet(ManageModelMixin, viewsets.ModelViewSet):
    def dispatch(self, request, *arg, **kwargs):
        res = super(RightModelViewSet, self).dispatch(request, *arg, **kwargs)
        obj = self.queryset
        user = self.request.user
        try:
            if request.method == "GET" and check_if(obj, user, can_view):
                return res
            if request.method != "GET" and check_if(obj, user, can_edit):
                return res
        except:
            pass  # To prevent bug with Anonymous user
        raise PermissionDenied


from .api import *
from .counter import *
from .user import *
from .club import *
from .group import *
from .launderette import *