mirror of
https://gitlab2.federez.net/re2o/re2o
synced 2024-11-22 11:23:10 +00:00
110 lines
4.2 KiB
Python
110 lines
4.2 KiB
Python
# -*- mode: python; coding: utf-8 -*-
|
|
# 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 Lara Kermarec
|
|
# Copyright © 2017 Augustin Lemesle
|
|
# Copyright © 2018 Maël Kervella
|
|
#
|
|
# 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.
|
|
"""re2o.field_permissions
|
|
A model mixin and a field mixin used to remove some unauthorized fields
|
|
from the form automatically generated from the model. The model must
|
|
subclass `FieldPermissionModelMixin` and the form must subclass
|
|
`FieldPermissionFieldMixin` so when a Django form is generated from the
|
|
fields of the models, some fields will be removed if the user don't have
|
|
the rights to change them (can_change_{name})
|
|
"""
|
|
|
|
|
|
class FieldPermissionModelMixin:
|
|
""" The model mixin. Defines the `has_field_perm` function """
|
|
|
|
field_permissions = {} # {'field_name': callable}
|
|
FIELD_PERM_CODENAME = "can_change_{model}_{name}"
|
|
FIELD_PERMISSION_GETTER = "can_change_{name}"
|
|
FIELD_PERMISSION_MISSING_DEFAULT = True
|
|
|
|
def has_field_perm(self, user, field):
|
|
""" Checks if a `user` has the right to edit the `field`
|
|
of this model """
|
|
if field in self.field_permissions:
|
|
checks = self.field_permissions[field]
|
|
if not isinstance(checks, (list, tuple)):
|
|
checks = [checks]
|
|
|
|
else:
|
|
checks = []
|
|
|
|
# Consult the optional field-specific hook.
|
|
getter_name = self.FIELD_PERMISSION_GETTER.format(name=field)
|
|
if hasattr(self, getter_name):
|
|
checks.append(getattr(self, getter_name))
|
|
|
|
# Try to find a static permission for the field
|
|
else:
|
|
perm_label = self.FIELD_PERM_CODENAME.format(
|
|
**{"model": self._meta.model_name, "name": field}
|
|
)
|
|
if perm_label in dict(self._meta.permissions):
|
|
checks.append(perm_label)
|
|
|
|
# No requirements means no restrictions.
|
|
if not len(checks):
|
|
return self.FIELD_PERMISSION_MISSING_DEFAULT
|
|
|
|
# Try to find a user setting that qualifies them for permission.
|
|
for perm in checks:
|
|
if callable(perm):
|
|
result, _reason, _permissions = perm(user_request=user)
|
|
if result is not None:
|
|
return result
|
|
else:
|
|
# Don't supply 'obj', or else infinite recursion.
|
|
result = user.has_perm(perm)
|
|
if result:
|
|
return True
|
|
|
|
# If no requirement can be met, then permission is denied.
|
|
return False
|
|
|
|
|
|
class FieldPermissionFormMixin:
|
|
"""
|
|
Build a form, and remove all forbiden fields
|
|
|
|
Parameters:
|
|
user:Build-in with a Django Form instance, and parameter user in kwargs,
|
|
representing calling user for this form. Then test if a field is forbiden
|
|
or not with has_field_paremeter model function
|
|
|
|
"""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
user = kwargs.pop("user")
|
|
|
|
super(FieldPermissionFormMixin, self).__init__(*args, **kwargs)
|
|
to_be_deleted = []
|
|
for name in self.fields:
|
|
if not self.instance.has_field_perm(user, field=name):
|
|
to_be_deleted.append(name)
|
|
for name in to_be_deleted:
|
|
self.remove_unauthorized_field(name)
|
|
|
|
def remove_unauthorized_field(self, name):
|
|
""" Remove one field from the fields of the form """
|
|
del self.fields[name]
|