Synnefo

# Copyright 2013 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

from optparse import make_option

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

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, 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)

    @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 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)