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#!/usr/bin/env python3

# Change syntax of wireless interfaces
# Migrate boolean nodes to valueless

from sys import exit
from vyos.configtree import ConfigTree

def migrate_dialer(config, tree, intf):
    for pppoe in config.list_nodes(tree):
        # assemble string, 0 -> pppoe0
        new_base = ['interfaces', 'pppoe', 'pppoe' + pppoe]
        config.set(new_base)
        # format as tag node to avoid loading problems
        config.set_tag(['interfaces', 'pppoe'])

        default_route = tree + [pppoe, 'default-route']
        print(default_route)
        if config.exists(default_route):
            tmp = config.return_value(default_route)
            config.set(new_base + ['default-route'], value=tmp)

        disable = tree + [pppoe, 'disable']
        if config.exists(disable):
            tmp = config.return_value(disable)
            config.set(new_base + ['disable'], value=tmp)

        mtu = tree + [pppoe, 'mtu']
        if config.exists(mtu):
            tmp = config.return_value(mtu)
            config.set(new_base + ['mtu'], value=tmp)

        nameserver = tree + [pppoe, 'name-server']
        if config.exists(nameserver):
            tmp = config.return_value(nameserver)
            config.set(new_base + ['name-server'], value=tmp)

        password = tree + [pppoe, 'password']
        if config.exists(password):
            tmp = config.return_value(password)
            config.set(new_base + ['password'], value=tmp)

        userid = tree + [pppoe, 'user-id']
        if config.exists(userid):
            tmp = config.return_value(userid)
            config.set(new_base + ['user-id'], value=tmp)

        ipv6_enable = tree + [pppoe, 'enable-ipv6']
        if config.exists(ipv6_enable):
            config.set(new_base + ['ipv6', 'enable'])

        ipv6_slaac = tree + [pppoe, 'ipv6', 'address', 'autoconf']
        if config.exists(ipv6_slaac):
            config.set(new_base + ['ipv6', 'address', 'autoconf'])

        # Delete old PPPoE interface
        config.delete(tree + [pppoe])


if __name__ == '__main__':

    if (len(sys.argv) < 1):
        print("Must specify file name!")
        exit(1)

    file_name = sys.argv[1]

    with open(file_name, 'r') as f:
        config_file = f.read()

    config = ConfigTree(config_file)
    pppoe_links = ['bonding', 'ethernet']

    for link_type in pppoe_links:
        if not config.exists(['interfaces', link_type]):
            continue

        for interface in config.list_nodes(['interfaces', link_type]):
            # check if PPPoE exists
            pppoe_if = ['interfaces', link_type, interface, 'pppoe']
            if config.exists(pppoe_if):
                for dialer in  config.list_nodes(pppoe_if):
                    migrate_dialer(config, pppoe_if, interface)

            # also migrate VLANs
            if not config.exists(['interfaces', link_type, interface, 'vif']):
                continue

            for vlan in config.list_nodes(['interfaces', link_type, interface, 'vif']):
                pppoe_if = ['interfaces', link_type, interface, 'vif', vlan, 'pppoe']
                if config.exists(pppoe_if):
                    for dialer in  config.list_nodes(pppoe_if):
                        intf = "{}.{}".format(interface, vlan)
                        migrate_dialer(config, pppoe_if, intf)


    print(config.to_string())
    exit(1)

    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)