Synnefo

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from optparse import make_option

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

from synnefo.api.util import get_image

from synnefo.db.models import VirtualMachine, Backend

from ._common import format_vm_state

class Command(BaseCommand):

    help = "List servers"

    option_list = BaseCommand.option_list + (

        make_option('-c',

            action='store_true',

            dest='csv',

            default=False,

            help="Use pipes to separate values"),

        make_option('--suspended',

            action='store_true',

            dest='suspended',

            default=False,

            help="List only suspended servers"),

        make_option('--build',

            action='store_true',

            dest='build',

            default=False,

            help="List only servers in the building state"),

        make_option('--deleted', action='store_true', dest='deleted',

                    default=False,

                    help="Include deletd servers"),

        make_option('--backend-id', dest='backend_id',

                    help="List only servers of the specified backend")

        )

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

        if args:

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

        if options['backend_id']:

            try:

                servers = Backend.objects.get(id=options['backend_id'])\

                                         .virtual_machines

            except Backend.DoesNotExist:

                raise CommandError("Backend not found in DB")

        else:

            servers = VirtualMachine.objects

        if options['deleted']:

            servers = servers.all()

        else:

            servers = servers.filter(deleted=False)

        if options['suspended']:

            servers = servers.filter(suspended=True)

        if options['build']:

            servers = servers.filter(operstate='BUILD')

        labels = ('id', 'name', 'owner', 'flavor', 'image', 'state',

                  'backend')

        columns = (3, 12, 20, 11, 12, 9, 40)

        if not options['csv']:

            line = ' '.join(l.rjust(w) for l, w in zip(labels, columns))

            self.stdout.write(line + '\n')

            sep = '-' * len(line)

            self.stdout.write(sep + '\n')

        cache = ImageCache()

        for server in servers.order_by('id'):

            id = str(server.id)

            try:

                name = server.name.decode('utf8')

            except UnicodeEncodeError:

                name = server.name

            flavor = server.flavor.name

            try:

                image = cache.get_image(server.imageid, server.userid)['name']

            except:

                image = server.imageid

            state = format_vm_state(server)

            fields = (id, name, server.userid, flavor, image, state,

                      str(server.backend))

            if options['csv']:

                line = '|'.join(fields)

            else:

                line = ' '.join(f.rjust(w) for f, w in zip(fields, columns))

            self.stdout.write(line.encode('utf8') + '\n')

class ImageCache(object):

    def __init__(self):

        self.images = {}

    def get_image(self, imageid, userid):

        if not imageid in self.images:

            self.images[imageid] = get_image(imageid, userid)

        return self.images[imageid]