OpenSlides/openslides/utils/auth/AnonymousAuth.py
2012-07-10 13:19:12 +02:00

97 lines
2.9 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
openslides.utils.auth.AnonymousAuth
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Functions for authenticate anonymous user.
:copyright: 2011, 2012 by OpenSlides team, see AUTHORS.
:license: GNU GPL, see LICENSE for more details.
"""
from django.contrib.auth.models import Permission
from openslides.config.models import config
class AnonymousAuth(object):
"""
Authenticates the AnonymousUser against the Permission-Group 'Anonymous'.
No rights are granted unless the group is defined and contains them.
"""
supports_anonymous_user = True
supports_inactive_user = True
supports_object_permissions = False
def authenticate(self, username=None, password=None):
"""
Authenticate a user based in username / password.
- always return None as anonymous can't login..
"""
return None
def get_group_permissions(self, user_obj, obj=None):
"""
Return the permissions a user is graneted by his group membership(s).
- try to return the permissions for the 'Anonymous' group
"""
if not user_obj.is_anonymous() or obj is not None or \
not config['system_enable_anonymous']:
return set()
perms = Permission.objects.filter(group__name='Anonymous')
if perms is None:
return set()
perms = perms.values_list('content_type__app_label', 'codename') \
.order_by()
return set([u'%s.%s' % (ct, name) for ct, name in perms])
def get_all_permissions(self, user_obj, obj=None):
"""
Return all permissions a user is granted including goup permissions.
- for anonymous it's identical to get_group_permissions
"""
return self.get_group_permissions(user_obj, obj)
def has_perm(self, user_obj, perm, obj=None):
"""
Check if the user as a specific permission
"""
if not user_obj.is_anonymous() or obj is not None or \
not config['system_enable_anonymous']:
return False
return (perm in self.get_all_permissions(user_obj))
def has_module_perm(self, user_obj, app_label):
"""
Check if the user has permissions on the module app_label
"""
if not user_obj.is_anonymous() or \
not config['system_enable_anonymous']:
return False
for perm in self.get_all_permissions(user_obj):
if perm[:perm.index('.')] == app_label:
return True
return False
def get_user(self, user_id):
"""
Return the User object for user_id
- for anonymous it's always None
"""
return None
def anonymous_context_additions(RequestContext):
"""
Add a variable to the request context that will indicate
if anonymous login is possible at all.
"""
return {'os_enable_anonymous_login' : config['system_enable_anonymous']}