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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
from django.conf import settings
from django.utils.translation import ugettext_lazy as _
import six
from horizon import exceptions
from openstack_dashboard import api
LOG = logging.getLogger(__name__)
def flavor_list(request):
"""Utility method to retrieve a list of flavors."""
try:
return api.nova.flavor_list(request)
except Exception:
exceptions.handle(request,
_('Unable to retrieve instance flavors.'))
return []
def sort_flavor_list(request, flavors):
"""Utility method to sort a list of flavors.
By default, returns the available flavors, sorted by RAM
usage (ascending). Override these behaviours with a
CREATE_INSTANCE_FLAVOR_SORT dict
in local_settings.py.
"""
def get_key(flavor, sort_key):
try:
return getattr(flavor, sort_key)
except AttributeError:
LOG.warning('Could not find sort key "%s". Using the default '
'"ram" instead.', sort_key)
return getattr(flavor, 'ram')
try:
flavor_sort = getattr(settings, 'CREATE_INSTANCE_FLAVOR_SORT', {})
sort_key = flavor_sort.get('key', 'ram')
rev = flavor_sort.get('reverse', False)
if not callable(sort_key):
key = lambda flavor: get_key(flavor, sort_key)
else:
key = sort_key
flavor_list = [(flavor.id, '%s' % flavor.name)
for flavor in sorted(flavors, key=key, reverse=rev)]
return flavor_list
except Exception:
exceptions.handle(request,
_('Unable to sort instance flavors.'))
return []
def availability_zone_list(request):
"""Utility method to retrieve a list of availability zones."""
try:
return api.nova.availability_zone_list(request)
except Exception:
exceptions.handle(request,
_('Unable to retrieve Nova availability zones.'))
return []
def network_field_data(request, include_empty_option=False):
"""Returns a list of tuples of all networks.
Generates a list of networks available to the user (request). And returns
a list of (id, name) tuples.
:param request: django http request object
:param include_empty_option: flag to include a empty tuple in the front of
the list
:return: list of (id, name) tuples
"""
tenant_id = request.user.tenant_id
try:
networks = api.neutron.network_list_for_tenant(request, tenant_id)
networks = [(n.id, n.name_or_id) for n in networks]
networks.sort(key=lambda obj: obj[1])
except Exception as e:
msg = _('Failed to get network list {0}').format(six.text_type(e))
exceptions.handle(request, msg)
if not networks:
if include_empty_option:
return [("", _("No networks available")), ]
return []
if include_empty_option:
return [("", _("Select Network")), ] + networks
return networks
def keypair_field_data(request, include_empty_option=False):
"""Returns a list of tuples of all keypairs.
Generates a list of keypairs available to the user (request). And returns
a list of (id, name) tuples.
:param request: django http request object
:param include_empty_option: flag to include a empty tuple in the front of
the list
:return: list of (id, name) tuples
"""
keypair_list = []
try:
keypairs = api.nova.keypair_list(request)
keypair_list = [(kp.name, kp.name) for kp in keypairs]
except Exception:
exceptions.handle(request, _('Unable to retrieve key pairs.'))
keypair_list = []
if not keypair_list:
if include_empty_option:
return [("", _("No key pairs available")), ]
return []
if include_empty_option:
return [("", _("Select a key pair")), ] + keypair_list
return keypair_list
def flavor_field_data(request, include_empty_option=False):
"""Returns a list of tuples of all image flavors.
Generates a list of image flavors available. And returns a list of
(id, name) tuples.
:param request: django http request object
:param include_empty_option: flag to include a empty tuple in the front of
the list
:return: list of (id, name) tuples
"""
flavors = flavor_list(request)
if flavors:
flavors_list = sort_flavor_list(request, flavors)
if include_empty_option:
return [("", _("Select Flavor")), ] + flavors_list
return flavors_list
if include_empty_option:
return [("", _("No flavors available")), ]
return []
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