Synnefo

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

from optparse import make_option

from util import pool_table_from_type, pool_map_chunks

from synnefo.db.pools import bitarray_to_map

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

        print_map('Pool', pool.to_map(), step, self.stdout)

        print_map('Reserved', bitarray_to_map(pool.reserved), step, self.stdout)

def print_map(name, pool_map, step, out):

    sep = '*' * 80

    out.write(sep + "\n")

    out.write("%s: \n" % name)

    out.write(sep + "\n")

    i = 0

    for p in pool_map_chunks(pool_map, step):

        out.write(("%d " % i).rjust(4))

        out.write(("|" + p + " |%d\n") % ( i + step - 1))

        i += step