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#!/usr/bin/env python3
#
# Copyright (C) 2021 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 <http://www.gnu.org/licenses/>.

from sys import exit, argv
from vyos.configtree import ConfigTree

if __name__ == '__main__':
    if (len(argv) < 1):
        print("Must specify file name!")
        exit(1)

    file_name = argv[1]
    with open(file_name, 'r') as f:
        config_file = f.read()

    config = ConfigTree(config_file)

    #
    # Migrate "interface ethernet eth0 ip ospf" to "protocols ospf interface eth0"
    #
    for type in config.list_nodes(['interfaces']):
        for interface in config.list_nodes(['interfaces', type]):

            ip_ospf = ['interfaces', type, interface, 'ip', 'ospf']
            if config.exists(ip_ospf):
                config.set(['protocols', 'ospf', 'interface'])
                config.set_tag(['protocols', 'ospf', 'interface'])
                config.copy(ip_ospf, ['protocols', 'ospf', 'interface', interface])
                config.delete(ip_ospf)

            vif_path = ['interfaces', type, interface, 'vif']
            if config.exists(vif_path):
                for vif in config.list_nodes(vif_path):
                    vif_ospf_path = vif_path + [vif, 'ip', 'ospf']
                    if config.exists(vif_ospf_path):
                        config.set(['protocols', 'ospf', 'interface'])
                        config.set_tag(['protocols', 'ospf', 'interface'])
                        config.copy(vif_ospf_path, ['protocols', 'ospf', 'interface', f'{interface}.{vif}'])
                        config.delete(vif_ospf_path)

            vif_s_path = ['interfaces', type, interface, 'vif-s']
            if config.exists(vif_s_path):
                for vif_s in config.list_nodes(vif_s_path):
                    vif_s_ospf_path = vif_s_path + [vif_s, 'ip', 'ospf']
                    if config.exists(vif_s_ospf_path):
                        config.set(['protocols', 'ospf', 'interface'])
                        config.set_tag(['protocols', 'ospf', 'interface'])
                        config.copy(vif_s_ospf_path, ['protocols', 'ospf', 'interface', f'{interface}.{vif_s}'])

                        vif_c_path = ['interfaces', type, interface, 'vif-s', vif_s, 'vif-c']
                        if config.exists(vif_c_path):
                            for vif_c in config.list_nodes(vif_c_path):
                                vif_c_ospf_path = vif_c_path + [vif_c, 'ip', 'ospf']
                                if config.exists(vif_c_ospf_path):
                                    config.set(['protocols', 'ospf', 'interface'])
                                    config.set_tag(['protocols', 'ospf', 'interface'])
                                    config.copy(vif_c_ospf_path, ['protocols', 'ospf', 'interface', f'{interface}.{vif_s}.{vif_c}'])
                                    config.delete(vif_c_ospf_path)

                        config.delete(vif_s_ospf_path)

    try:
        with open(file_name, 'w') as f:
            f.write(config.to_string())
    except OSError as e:
        print("Failed to save the modified config: {}".format(e))
        exit(1)