#!/usr/bin/python3
#
# Univention Admingrp User Passwordreset
#  ldap-group-to-file-hooks.d script
#
# Copyright 2013-2022 Univention GmbH
#
# https://www.univention.de/
#
# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
#
# Binary versions of this program provided by Univention to you as
# well as other copyrighted, protected or trademarked materials like
# Logos, graphics, fonts, specific documentations and configurations,
# cryptographic keys etc. are subject to a license agreement between
# you and Univention and not subject to the GNU AGPL V3.
#
# In the case you use this program under the terms of the GNU AGPL V3,
# the program is provided 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License with the Debian GNU/Linux or Univention distribution in file
# /usr/share/common-licenses/AGPL-3; if not, see
# <https://www.gnu.org/licenses/>.

import argparse
import grp
import subprocess
import sys
import univention.config_registry


def _get_members_of(groupname):
	try:
		grpstruct = grp.getgrnam(groupname)
		return ','.join(grpstruct.gr_mem)
	except KeyError:
		return ''


if __name__ == '__main__':
	parser = argparse.ArgumentParser()
	parser.add_argument("--no-slapd-restart", dest="slapd_restart", default=True, action="store_false", help="do not restart the OpenLDAP server automatically")
	args = parser.parse_args()

	ucr = univention.config_registry.ConfigRegistry()
	ucr.load()

	protected_groups = ucr.get('ldap/acl/user/passwordreset/protected/gid')

	slapd_reconfigure = False

	if protected_groups:
		for group in protected_groups.split(','):
			old_value = ucr.get('ldap/acl/user/passwordreset/internal/groupmemberlist/%s' % group)
			new_value = _get_members_of(group)
			if old_value != new_value:
				univention.config_registry.handler_set(['ldap/acl/user/passwordreset/internal/groupmemberlist/%s=%s' % (group, new_value)])
				slapd_reconfigure = True

	if slapd_reconfigure:
		subprocess.call(['ucr', 'commit', '/etc/ldap/slapd.conf'])
		if args.slapd_restart:
			subprocess.call(['/etc/init.d/slapd', 'graceful-restart'])

	sys.exit(0)
