Synnefo

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from optparse import make_option

from django.db import transaction

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

from django.utils import simplejson as json

from astakos.im.register import add_resource, RegisterException

from ._common import read_from_file

class Command(BaseCommand):

    help = "Register resources"

    option_list = BaseCommand.option_list + (

        make_option('--json',

                    dest='json',

                    metavar='<json.file>',

                    help="Load resource definitions from a json file"),

    )

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

        json_file = options['json']

        if not json_file:

            m = "Expecting option --json."

            raise CommandError(m)

        else:

            data = read_from_file(json_file)

            m = 'Input should be a JSON list.'

            try:

                data = json.loads(data)

            except json.JSONDecodeError:

                raise CommandError(m)

            if not isinstance(data, list):

                raise CommandError(m)

        self.add_resources(data)

    @transaction.commit_on_success

    def add_resources(self, resources):

        output = []

        for resource in resources:

            if not isinstance(resource, dict):

                raise CommandError("Malformed resource dict.")

            try:

                r, exists = add_resource(resource)

            except RegisterException as e:

                raise CommandError(e.message)

            name = r.name

            if exists:

                m = "Resource '%s' updated in database.\n" % (name)

            else:

                m = ("Resource '%s' created in database with default "

                     "quota limit 0.\n" % (name))

            output.append(m)

        for line in output:

            self.stdout.write(line)