Synnefo

# Copyright 2012 GRNET S.A. All rights reserved.

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import ipaddr

from datetime import datetime

from django.utils.timesince import timesince, timeuntil

from django.core.management import CommandError

from synnefo.api.util import validate_network_size

from synnefo.settings import MAX_CIDR_BLOCK

def format_bool(b):

    return 'YES' if b else 'NO'

def format_date(d):

    if not d:

        return ''

    if d < datetime.now():

        return timesince(d) + ' ago'

    else:

        return 'in ' + timeuntil(d)

def format_vm_state(vm):

    if vm.operstate == "BUILD":

        return "BUILD(" + str(vm.buildpercentage) + "%)"

    else:

        return vm.operstate

def validate_network_info(options):

    subnet = options['subnet']

    gateway = options['gateway']

    subnet6 = options['subnet6']

    gateway6 = options['gateway6']

    try:

        net = ipaddr.IPv4Network(subnet)

        prefix = net.prefixlen

        if not validate_network_size(prefix):

            raise CommandError("Unsupport network mask %d."

                               " Must be in range (%s,29] "

                               % (prefix, MAX_CIDR_BLOCK))

    except ValueError:

        raise CommandError('Malformed subnet')

    try:

        gateway and ipaddr.IPv4Address(gateway) or None

    except ValueError:

        raise CommandError('Malformed gateway')

    try:

        subnet6 and ipaddr.IPv6Network(subnet6) or None

    except ValueError:

        raise CommandError('Malformed subnet6')

    try:

        gateway6 and ipaddr.IPv6Address(gateway6) or None

    except ValueError:

        raise CommandError('Malformed gateway6')

    return subnet, gateway, subnet6, gateway6