Synnefo

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

from optparse import make_option

from synnefo.db.pools import bitarray_to_map

from synnefo.db.models import MacPrefixPoolTable, BridgePoolTable

from synnefo.management import pprint

POOL_CHOICES = ['bridge', 'mac-prefix']

class Command(BaseCommand):

    args = "<pool ID>"

    help = "Show a pool"

    output_transaction = True

    option_list = BaseCommand.option_list + (

        make_option('--type', dest='type',

                    choices=POOL_CHOICES,

                    help="Type of pool"

                    ),

    )

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

        type_ = options['type']

        if not type_:

            raise CommandError("Type of pool is mandatory")

        pool_table = pool_table_from_type(type_)

        try:

            pool_id = int(args[0])

            pool_row = pool_table.objects.get(id=pool_id)

        except (ValueError, pool_table.DoesNotExist):

            raise CommandError("Invalid pool ID")

        pool = pool_row.pool

        kv = {

            'id': pool_row.id,

            'offset': pool_row.offset,

            'base': pool_row.base,

            'size': pool_row.size,

            'available': pool.count_available(),

            'reserved': pool.count_reserved(),

        }

        for key, val in sorted(kv.items()):

            line = '%s: %s\n' % (key.rjust(16), val)

            self.stdout.write(line.encode('utf8'))

        step = (type_ == 'bridge') and 64 or 80

        pprint.pprint_pool('Available', pool.to_map(), step, self.stdout)

        pprint.pprint_pool('Reserved',

                           bitarray_to_map(pool.reserved[:pool_row.size]),

                           step, self.stdout)

def pool_table_from_type(type_):

    if type_ == "mac-prefix":

        return MacPrefixPoolTable

    elif type_ == "bridge":

        return BridgePoolTable

    # elif type == "ip":

    #     return IPPoolTable

    else:

        raise ValueError("Invalid pool type")