Synnefo

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from optparse import make_option

from django.core.management.base import BaseCommand, CommandError

from synnefo.management.common import validate_network_info, get_backend

from synnefo.webproject.management.utils import pprint_table

from synnefo.db.models import Network

from synnefo.logic.backend import create_network

from synnefo.api.util import values_from_flavor

NETWORK_FLAVORS = Network.FLAVORS.keys()

class Command(BaseCommand):

    can_import_settings = True

    output_transaction = True

    help = "Create a new network"

    option_list = BaseCommand.option_list + (

        make_option(

            "-n",

            "--dry-run",

            dest="dry_run",

            default=False,

            action="store_true"),

        make_option(

            '--name',

            dest='name',

            help="Name of network"),

        make_option(

            '--owner',

            dest='owner',

            help="The owner of the network"),

        make_option(

            '--subnet',

            dest='subnet',

            default=None,

            # required=True,

            help='Subnet of the network'),

        make_option(

            '--gateway',

            dest='gateway',

            default=None,

            help='Gateway of the network'),

        make_option(

            '--subnet6',

            dest='subnet6',

            default=None,

            help='IPv6 subnet of the network'),

        make_option(

            '--gateway6',

            dest='gateway6',

            default=None,

            help='IPv6 gateway of the network'),

        make_option(

            '--dhcp',

            dest='dhcp',

            action='store_true',

            default=False,

            help='Automatically assign IPs'),

        make_option(

            '--public',

            dest='public',

            action='store_true',

            default=False,

            help='Network is public'),

        make_option(

            '--flavor',

            dest='flavor',

            default=None,

            choices=NETWORK_FLAVORS,

            help='Network flavor. Choices: ' + ', '.join(NETWORK_FLAVORS)),

        make_option(

            '--mode',

            dest='mode',

            default=None,

            help="Overwrite flavor connectivity mode."),

        make_option(

            '--link',

            dest='link',

            default=None,

            help="Overwrite flavor connectivity link."),

        make_option(

            '--mac-prefix',

            dest='mac_prefix',

            default=None,

            help="Overwrite flavor connectivity MAC prefix"),

        make_option(

            '--tags',

            dest='tags',

            default=None,

            help='The tags of the Network (comma separated strings)'),

        make_option(

            '--backend-id',

            dest='backend_id',

            default=None,

            help='ID of the backend that the network will be created. Only for'

                 ' public networks'),

    )

    def handle(self, *args, **options):

        if args:

            raise CommandError("Command doesn't accept any arguments")

        dry_run = options["dry_run"]

        name = options['name']

        subnet = options['subnet']

        backend_id = options['backend_id']

        public = options['public']

        flavor = options['flavor']

        mode = options['mode']

        link = options['link']

        mac_prefix = options['mac_prefix']

        tags = options['tags']

        if not name:

            raise CommandError("Name is required")

        if not subnet:

            raise CommandError("Subnet is required")

        if not flavor:

            raise CommandError("Flavor is required")

        if public and not backend_id:

            raise CommandError("backend-id is required")

        if backend_id and not public:

            raise CommandError("Private networks must be created to"

                               " all backends")

        if mac_prefix and flavor == "MAC_FILTERED":

            raise CommandError("Can not override MAC_FILTERED mac-prefix")

        if link and flavor == "PHYSICAL_VLAN":

            raise CommandError("Can not override PHYSICAL_VLAN link")

        if backend_id:

            backend = get_backend(backend_id)

        fmode, flink, fmac_prefix, ftags = values_from_flavor(flavor)

        mode = mode or fmode

        link = link or flink

        mac_prefix = mac_prefix or fmac_prefix

        tags = tags or ftags

        subnet, gateway, subnet6, gateway6 = validate_network_info(options)

        if not link or not mode:

            raise CommandError("Can not create network."

                               " No connectivity link or mode")

        netinfo = {

           "name": name,

           "userid": options["owner"],

           "subnet": subnet,

           "gateway": gateway,

           "gateway6": gateway6,

           "subnet6": subnet6,

           "dhcp": options["dhcp"],

           "flavor": flavor,

           "public": public,

           "mode": mode,

           "link": link,

           "mac_prefix": mac_prefix,

           "tags": tags,

           "state": "PENDING"}

        if dry_run:

            self.stdout.write("Creating network:\n")

            pprint_table(self.stdout, tuple(netinfo.items()))

            return

        network = Network.objects.create(**netinfo)

        if public:

            # Create BackendNetwork only to the specified Backend

            network.create_backend_network(backend)

            create_network(network, backends=[backend])

        else:

            # Create BackendNetwork entries for all Backends

            network.create_backend_network()

            create_network(network)