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# Copyright 2020-2024 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/>.

# change mppe node to a leaf node with value prefer

from vyos.configtree import ConfigTree

base = ['service', 'pppoe-server']

def migrate(config: ConfigTree) -> None:
    if not config.exists(base):
        # Nothing to do
        return

    mppe_base = base + ['ppp-options', 'mppe']
    if config.exists(mppe_base):
        # get current values
        tmp = config.list_nodes(mppe_base)
        # drop node(s) first ...
        config.delete(mppe_base)

        print(tmp)
        # set new value based on preference
        if 'require' in tmp:
            config.set(mppe_base, value='require')
        elif 'prefer' in tmp:
            config.set(mppe_base, value='prefer')
        elif 'deny' in tmp:
            config.set(mppe_base, value='deny')