#!/usr/bin/env python3

# Copyright 2018-2024 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library.  If not, see <http://www.gnu.org/licenses/>.

# Delete "set system ntp server <n> dynamic" option

from vyos.configtree import ConfigTree

def migrate(config: ConfigTree) -> None:
    if not config.exists(['system', 'ntp', 'server']):
        # Nothing to do
        return

    # Delete abandoned leaf node if found inside tag node for
    # "set system ntp server <n> dynamic"
    base = ['system', 'ntp', 'server']
    for server in config.list_nodes(base):
        if config.exists(base + [server, 'dynamic']):
            config.delete(base + [server, 'dynamic'])