Synnefo

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from optparse import make_option

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

from django.db.utils import IntegrityError

from django.utils import simplejson as json

from snf_django.lib.db.transaction import commit_on_success_strict

from astakos.im.register import add_resource, ResourceException

from astakos.im.models import Service

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:

            with open(json_file) as file_data:

                m = 'Input should be a JSON list.'

                try:

                    data = json.load(file_data)

                except json.JSONDecodeError:

                    raise CommandError(m)

                if not isinstance(data, list):

                    raise CommandError(m)

        self.add_resources(data)

    @commit_on_success_strict()

    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 ResourceException 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)