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models.py
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models.py
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# -*- coding: utf-8 -*-
#
# Copyright © 2012 - 2020 Michal Čihař <michal@cihar.com>
#
# This file is part of Weblate <https://weblate.org/>
#
# 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 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, see <https://www.gnu.org/licenses/>.
#
import re
import six
from appconf import AppConf
from django.conf import settings
from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
from django.contrib.auth.models import Group as DjangoGroup
from django.db import models
from django.db.models.signals import m2m_changed, post_save, pre_delete
from django.dispatch import receiver
from django.http import Http404
from django.urls import reverse
from django.utils import timezone
from django.utils.functional import cached_property
from django.utils.translation import pgettext, ugettext
from django.utils.translation import ugettext_lazy as _
from weblate.auth.data import (
ACL_GROUPS,
GLOBAL_PERM_NAMES,
SELECTION_ALL,
SELECTION_ALL_PROTECTED,
SELECTION_ALL_PUBLIC,
SELECTION_COMPONENT_LIST,
SELECTION_MANUAL,
)
from weblate.auth.permissions import SPECIALS, check_global_permission, check_permission
from weblate.auth.utils import (
create_anonymous,
migrate_groups,
migrate_permissions,
migrate_roles,
)
from weblate.lang.models import Language
from weblate.trans.defines import EMAIL_LENGTH, FULLNAME_LENGTH, USERNAME_LENGTH
from weblate.trans.fields import RegexField
from weblate.trans.models import ComponentList, Project
from weblate.utils.decorators import disable_for_loaddata
from weblate.utils.validators import (
validate_email,
validate_fullname,
validate_username,
)
class Permission(models.Model):
codename = models.CharField(max_length=100, unique=True)
name = models.CharField(max_length=200)
class Meta(object):
verbose_name = _('Permission')
verbose_name_plural = _('Permissions')
def __str__(self):
return ugettext(self.name)
class Role(models.Model):
name = models.CharField(verbose_name=_('Name'), max_length=200)
permissions = models.ManyToManyField(
Permission,
verbose_name=_('Permissions'),
blank=True,
help_text=_('Choose permissions granted to this role.'),
)
def __str__(self):
return pgettext('Access control role', self.name)
class GroupManager(BaseUserManager):
def for_project(self, project):
"""All groups for a project."""
return self.filter(
projects=project, internal=True, name__contains='@'
).order_by('name')
class Group(models.Model):
SELECTION_MANUAL = 0
SELECTION_ALL = 1
SELECTION_COMPONENT_LIST = 2
name = models.CharField(_('Name'), max_length=150, unique=True)
roles = models.ManyToManyField(
Role,
verbose_name=_('Roles'),
blank=True,
help_text=_('Choose roles granted to this group.'),
)
project_selection = models.IntegerField(
verbose_name=_('Project selection'),
choices=(
(SELECTION_MANUAL, _('As defined')),
(SELECTION_ALL, _('All projects')),
(SELECTION_ALL_PUBLIC, _('All public projects')),
(SELECTION_ALL_PROTECTED, _('All protected projects')),
(SELECTION_COMPONENT_LIST, _('From component list')),
),
default=SELECTION_MANUAL,
)
projects = models.ManyToManyField(
'trans.Project', verbose_name=_('Projects'), blank=True
)
componentlist = models.ForeignKey(
'trans.ComponentList',
verbose_name=_('Component list'),
on_delete=models.deletion.CASCADE,
null=True,
blank=True,
)
language_selection = models.IntegerField(
verbose_name=_('Language selection'),
choices=(
(SELECTION_MANUAL, _('As defined')),
(SELECTION_ALL, _('All languages')),
),
default=SELECTION_MANUAL,
)
languages = models.ManyToManyField(
'lang.Language', verbose_name=_('Languages'), blank=True
)
internal = models.BooleanField(
verbose_name=_('Weblate internal group'), default=False
)
objects = GroupManager()
def __str__(self):
return pgettext('Access control group', self.name)
@cached_property
def short_name(self):
if '@' in self.name:
return pgettext('Per project access control group', self.name.split('@')[1])
return self.__str__()
def save(self, *args, **kwargs):
super(Group, self).save(*args, **kwargs)
if self.language_selection == SELECTION_ALL:
self.languages.set(Language.objects.all())
if self.project_selection == SELECTION_ALL:
self.projects.set(Project.objects.all())
elif self.project_selection == SELECTION_ALL_PUBLIC:
self.projects.set(
Project.objects.filter(access_control=Project.ACCESS_PUBLIC), clear=True
)
elif self.project_selection == SELECTION_ALL_PROTECTED:
self.projects.set(
Project.objects.filter(
access_control__in=(Project.ACCESS_PUBLIC, Project.ACCESS_PROTECTED)
),
clear=True,
)
elif self.project_selection == SELECTION_COMPONENT_LIST:
self.projects.set(
Project.objects.filter(component__componentlist=self.componentlist),
clear=True,
)
class UserManager(BaseUserManager):
use_in_migrations = True
def _create_user(self, username, email, password, **extra_fields):
"""Create and save a User with the given username, e-mail and password."""
if not username:
raise ValueError('The given username must be set')
email = self.normalize_email(email)
username = self.model.normalize_username(username)
user = self.model(username=username, email=email, **extra_fields)
user.set_password(password)
user.save(using=self._db)
return user
def create_user(self, username, email=None, password=None, **extra_fields):
extra_fields.setdefault('is_superuser', False)
return self._create_user(username, email, password, **extra_fields)
def create_superuser(self, username, email, password, **extra_fields):
extra_fields.setdefault('is_superuser', True)
if extra_fields.get('is_superuser') is not True:
raise ValueError('Superuser must have is_superuser=True.')
return self._create_user(username, email, password, **extra_fields)
def for_project(self, project):
"""Return all users having ACL for this project."""
groups = project.group_set.filter(internal=True, name__contains='@')
return self.filter(groups__in=groups).distinct()
def having_perm(self, perm, project):
"""All users having explicit permission on a project.
Note: This intentionally does not list superusers.
"""
groups = Group.objects.filter(
roles__permissions__codename=perm, projects=project
)
return self.filter(groups__in=groups).distinct()
def all_admins(self, project):
"""All admins in a project."""
return self.having_perm('project.edit', project)
def order(self):
return self.order_by('username')
def get_anonymous():
"""Return an anonymous user."""
return User.objects.get(username=settings.ANONYMOUS_USER_NAME)
def wrap_group(func):
"""Wrapper to replace Django Group instances by Weblate Group instances."""
def group_wrapper(self, *objs, **kwargs):
objs = list(objs)
for idx, obj in enumerate(objs):
if isinstance(obj, DjangoGroup):
objs[idx] = Group.objects.get_or_create(name=obj.name)[0]
return func(self, *objs, **kwargs)
return group_wrapper
class GroupManyToManyField(models.ManyToManyField):
"""Customized field to accept Django Groups objects as well."""
def contribute_to_class(self, cls, name, **kwargs):
super(GroupManyToManyField, self).contribute_to_class(cls, name, **kwargs)
# Get related descriptor
descriptor = getattr(cls, self.name)
# We care only on forward relation
if not descriptor.reverse:
# Running in migrations
if isinstance(descriptor.rel.model, six.string_types):
return
# Get related manager class
related_manager_cls = descriptor.related_manager_cls
# Monkey patch it to accept Django Group instances as well
related_manager_cls.add = wrap_group(related_manager_cls.add)
related_manager_cls.remove = wrap_group(related_manager_cls.remove)
class User(AbstractBaseUser):
username = models.CharField(
_('username'),
max_length=USERNAME_LENGTH,
unique=True,
help_text=_(
'Username may only contain letters, '
'numbers or the following characters: @ . + - _'
),
validators=[validate_username],
error_messages={'unique': _("A user with that username already exists.")},
)
full_name = models.CharField(
_('Full name'),
max_length=FULLNAME_LENGTH,
blank=False,
validators=[validate_fullname],
)
email = models.EmailField( # noqa: DJ01
_('E-mail'),
blank=False,
null=True,
max_length=EMAIL_LENGTH,
unique=True,
validators=[validate_email],
)
is_superuser = models.BooleanField(
_('Superuser status'),
default=False,
help_text=_('User has all possible permissions.'),
)
is_active = models.BooleanField(
_('Active'),
default=True,
help_text=_('Mark user as inactive instead of removing.'),
)
date_joined = models.DateTimeField(_('Date joined'), default=timezone.now)
groups = GroupManyToManyField(
Group,
verbose_name=_('Groups'),
blank=True,
help_text=_(
'The user is granted all permissions included in '
'membership of these groups.'
),
)
objects = UserManager()
EMAIL_FIELD = 'email'
USERNAME_FIELD = 'username'
REQUIRED_FIELDS = ['email', 'full_name']
DUMMY_FIELDS = ('first_name', 'last_name', 'is_staff')
def __init__(self, *args, **kwargs):
self.extra_data = {}
self.perm_cache = {}
self.current_subscription = None
for name in self.DUMMY_FIELDS:
if name in kwargs:
self.extra_data[name] = kwargs.pop(name)
super(User, self).__init__(*args, **kwargs)
def get_absolute_url(self):
return reverse('user_page', kwargs={'user': self.username})
def clear_cache(self):
self.perm_cache = {}
@cached_property
def is_anonymous(self):
return self.username == settings.ANONYMOUS_USER_NAME
@cached_property
def is_authenticated(self):
return not self.is_anonymous
def get_full_name(self):
return self.full_name
def get_short_name(self):
return self.full_name
def __str__(self):
return self.full_name
def __setattr__(self, name, value):
"""Mimic first/last name for third party auth and ignore is_staff flag."""
if name in self.DUMMY_FIELDS:
self.extra_data[name] = value
else:
super(User, self).__setattr__(name, value)
def save(self, *args, **kwargs):
# Generate full name from parts
# This is needed with LDAP authentication when the
# server does not contain full name
if 'first_name' in self.extra_data and 'last_name' in self.extra_data:
self.full_name = '{first_name} {last_name}'.format(**self.extra_data)
elif 'first_name' in self.extra_data:
self.full_name = self.extra_data['first_name']
elif 'last_name' in self.extra_data:
self.full_name = self.extra_data['last_name']
if not self.email:
self.email = None
super(User, self).save(*args, **kwargs)
def has_module_perms(self, module):
"""Compatibility API for admin interface."""
return self.is_superuser
@property
def is_staff(self):
"""Compatibility API for admin interface."""
return self.is_superuser
@property
def first_name(self):
"""Compatibility API for third party modules."""
return ''
@property
def last_name(self):
"""Compatibility API for third party modules."""
return self.full_name
def has_perms(self, perm_list, obj=None):
return all(self.has_perm(perm, obj) for perm in perm_list)
# pylint: disable=keyword-arg-before-vararg
def has_perm(self, perm, obj=None, *args):
"""Permission check."""
# Weblate global scope permissions
if perm in GLOBAL_PERM_NAMES:
return check_global_permission(self, perm, obj)
# Compatibility API for admin interface
if obj is None:
if not self.is_superuser:
return False
# Check permissions restrictions
allowed = settings.AUTH_RESTRICT_ADMINS.get(self.username)
return allowed is None or perm in allowed
# Validate perms, this is expensive to perform, so this only in test by
# default
if settings.AUTH_VALIDATE_PERMS and ':' not in perm:
try:
Permission.objects.get(codename=perm)
except Permission.DoesNotExist:
raise ValueError('Invalid permission: {}'.format(perm))
# Special permission functions
if perm in SPECIALS:
return SPECIALS[perm](self, perm, obj, *args)
# Generic permission
return check_permission(self, perm, obj)
def can_access_project(self, project):
"""Check access to given project."""
if self.is_superuser:
return True
return self.groups.filter(projects=project).exists()
def check_access(self, project):
"""Raise an error if user is not allowed to access this project."""
if not self.can_access_project(project):
raise Http404('Access denied')
@cached_property
def allowed_projects(self):
"""List of allowed projects."""
if self.is_superuser:
result = Project.objects.order()
else:
result = Project.objects.filter(group__user=self).distinct().order()
# Force evaluating the query, we use it frequently so better to fetch it once
# instead doing complex joins in every place.
len(result)
return result
@cached_property
def owned_projects(self):
return self.projects_with_perm('project.edit')
def projects_with_perm(self, perm):
if self.is_superuser:
return Project.objects.all().order()
groups = Group.objects.filter(user=self, roles__permissions__codename=perm)
return Project.objects.filter(group__in=groups).distinct().order()
def get_visible_name(self):
# Get full name from database or username
result = self.full_name or self.username
return result.replace("<", "").replace(">", "").replace('"', "")
def get_author_name(self, email=True):
"""Return formatted author name with e-mail."""
# The < > are replace to avoid tricking Git to use
# name as e-mail
full_name = self.get_visible_name()
# Add e-mail if we are asked for it
if not email:
return full_name
return "{0} <{1}>".format(full_name, self.email)
class AutoGroup(models.Model):
match = RegexField(
verbose_name=_('E-mail regular expression'),
max_length=200,
default='^.*$',
help_text=_('Regular expression used to match user e-mail.'),
)
group = models.ForeignKey(
Group, verbose_name=_('Group to assign'), on_delete=models.deletion.CASCADE
)
class Meta(object):
verbose_name = _('Automatic group assignment')
verbose_name_plural = _('Automatic group assignments')
def __str__(self):
return 'Automatic rule for {0}'.format(self.group)
def create_groups(update):
"""Creates standard groups and gives them permissions."""
# Create permissions and roles
migrate_permissions(Permission)
new_roles = migrate_roles(Role, Permission)
migrate_groups(Group, Role, update)
# Create anonymous user
create_anonymous(User, Group, update)
# Automatic assignment to the users group
group = Group.objects.get(name='Users')
if not AutoGroup.objects.filter(group=group).exists():
AutoGroup.objects.create(group=group, match='^.*$')
group = Group.objects.get(name='Viewers')
if not AutoGroup.objects.filter(group=group).exists():
AutoGroup.objects.create(group=group, match='^.*$')
# Create new per project groups
if new_roles:
for project in Project.objects.iterator():
project.save()
def sync_create_groups(sender, **kwargs):
"""Create default groups."""
create_groups(False)
def auto_assign_group(user):
"""Automatic group assignment based on user e-mail."""
if user.username == settings.ANONYMOUS_USER_NAME:
return
# Add user to automatic groups
for auto in AutoGroup.objects.iterator():
if re.match(auto.match, user.email or ''):
user.groups.add(auto.group)
@receiver(m2m_changed, sender=ComponentList.components.through)
def change_componentlist(sender, instance, **kwargs):
groups = Group.objects.filter(
componentlist=instance, project_selection=Group.SELECTION_COMPONENT_LIST
)
for group in groups:
group.projects.set(
Project.objects.filter(component__componentlist=instance), clear=True
)
@receiver(post_save, sender=User)
@disable_for_loaddata
def auto_group_upon_save(sender, instance, created=False, **kwargs):
"""Automatically add user to Users group."""
if created:
auto_assign_group(instance)
@receiver(post_save, sender=Language)
@disable_for_loaddata
def setup_language_groups(sender, instance, **kwargs):
"""Set up group objects upon saving language."""
auto_languages = Group.objects.filter(language_selection=SELECTION_ALL)
for group in auto_languages:
group.languages.add(instance)
@receiver(post_save, sender=Project)
@disable_for_loaddata
def setup_project_groups(sender, instance, **kwargs):
"""Set up group objects upon saving project."""
# Handle group automation to set project visibility
auto_projects = Group.objects.filter(
project_selection__in=(
SELECTION_ALL,
SELECTION_ALL_PUBLIC,
SELECTION_ALL_PROTECTED,
)
)
for group in auto_projects:
group.save()
old_access_control = instance.old_access_control
instance.old_access_control = instance.access_control
if instance.access_control == Project.ACCESS_CUSTOM:
if old_access_control == Project.ACCESS_CUSTOM:
return
# Do cleanup of previous setup
Group.objects.filter(
name__contains='@', internal=True, projects=instance
).delete()
return
# Choose groups to configure
if instance.access_control == Project.ACCESS_PUBLIC:
groups = {'Administration', 'Review'}
else:
groups = set(ACL_GROUPS.keys())
# Remove review group if review is not enabled
if not instance.enable_review:
groups.remove('Review')
# Remove billing if billing is not installed
if 'weblate.billing' not in settings.INSTALLED_APPS:
groups.discard('Billing')
# Create role specific groups
handled = set()
for group_name in groups:
name = '{0}@{1}'.format(instance.name, group_name)
try:
group = instance.group_set.get(
internal=True, name__endswith='@{}'.format(group_name)
)
# Update exiting group (to handle rename)
if group.name != name:
group.name = name
group.save()
except Group.DoesNotExist:
# Create new group
group, created = Group.objects.get_or_create(
internal=True,
name=name,
defaults={
'project_selection': SELECTION_MANUAL,
'language_selection': SELECTION_ALL,
},
)
if created:
group.projects.add(instance)
group.roles.set(
Role.objects.filter(name=ACL_GROUPS[group_name]), clear=True
)
handled.add(group.pk)
# Remove stale groups
instance.group_set.filter(name__contains='@', internal=True).exclude(
pk__in=handled
).delete()
@receiver(pre_delete, sender=Project)
def cleanup_group_acl(sender, instance, **kwargs):
instance.group_set.filter(name__contains='@', internal=True).delete()
class WeblateAuthConf(AppConf):
"""Authentication settings."""
AUTH_VALIDATE_PERMS = False
AUTH_RESTRICT_ADMINS = {}
# Anonymous user name
ANONYMOUS_USER_NAME = 'anonymous'
class Meta(object):
prefix = ''