Synnefo

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from optparse import make_option

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

from synnefo.management.common import (format_vm_state, get_backend,

                                       filter_results, pprint_table, UUIDCache)

from synnefo.api.util import get_image

from synnefo.db.models import VirtualMachine

FIELDS = VirtualMachine._meta.get_all_field_names()

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 deleted servers"),

        make_option('--backend-id',

            dest='backend_id',

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

        make_option('--filter-by',

            dest='filter_by',

            help="Filter results. Comma seperated list of key `cond` val pairs"

                 " that displayed entries must satisfy. e.g."

                 " --filter-by \"operstate=STARTED,id>=22\"."

                 " Available keys are: %s" % ", ".join(FIELDS)),

        make_option('--uuids',

            action='store_true',

            dest='use_uuids',

            default=False,

            help="Display UUIDs instead of user emails"),

        )

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

        if args:

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

        if options['backend_id']:

            backend = get_backend(options['backend_id'])

            servers = backend.virtual_machines

        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')

        filter_by = options['filter_by']

        if filter_by:

            servers = filter_results(servers, filter_by)

        cache = ImageCache()

        if options['use_uuids'] is False:

            ucache = UUIDCache()

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

                   'backend')

        table = []

        for server in servers.order_by('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)

            user = server.userid

            if options['use_uuids'] is False:

                user = ucache.get_user(server.userid)

            fields = (str(server.id), name, user, flavor, image,

                      state, str(server.backend))

            table.append(fields)

        separator = " | " if options['csv'] else None

        pprint_table(self.stdout, table, headers, separator)

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]