text: # Copyright 2012 Nebula, Inc.
  #
  #    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.
  
  from django.utils.translation import ugettext_lazy as _
  
  from horizon import exceptions
  from horizon import tabs
  from openstack_dashboard.api import base
  from openstack_dashboard.api import cinder
  from openstack_dashboard.api import keystone
  from openstack_dashboard.api import neutron
  from openstack_dashboard.api import nova
  from openstack_dashboard.dashboards.admin.info import constants
  from openstack_dashboard.dashboards.admin.info import tables
  
  
  class ServicesTab(tabs.TableTab):
      table_classes = (tables.ServicesTable,)
      name = _("Services")
      slug = "services"
      template_name = constants.INFO_DETAIL_TEMPLATE_NAME
  
      def get_services_data(self):
          request = self.tab_group.request
          services = []
          for i, service in enumerate(request.user.service_catalog):
              service['id'] = i
              services.append(
                  keystone.Service(service, request.user.services_region))
          return services
  
  
  class NovaServicesTab(tabs.TableTab):
      table_classes = (tables.NovaServicesTable,)
      name = _("Compute Services")
      slug = "nova_services"
      template_name = constants.INFO_DETAIL_TEMPLATE_NAME
      permissions = ('openstack.services.compute',)
  
      def get_nova_services_data(self):
          try:
              services = nova.service_list(self.tab_group.request)
          except Exception:
              msg = _('Unable to get nova services list.')
              exceptions.check_message(["Connection", "refused"], msg)
              exceptions.handle(self.request, msg)
              services = []
          return services
  
  
  class CinderServicesTab(tabs.TableTab):
      table_classes = (tables.CinderServicesTable,)
      name = _("Block Storage Services")
      slug = "cinder_services"
      template_name = constants.INFO_DETAIL_TEMPLATE_NAME
      permissions = ('openstack.services.volume',)
  
      def get_cinder_services_data(self):
          try:
              services = cinder.service_list(self.tab_group.request)
          except Exception:
              msg = _('Unable to get cinder services list.')
              exceptions.check_message(["Connection", "refused"], msg)
              exceptions.handle(self.request, msg)
              services = []
          return services
  
  
  class NetworkAgentsTab(tabs.TableTab):
      table_classes = (tables.NetworkAgentsTable,)
      name = _("Network Agents")
      slug = "network_agents"
      template_name = constants.INFO_DETAIL_TEMPLATE_NAME
  
      def allowed(self, request):
          try:
              return (base.is_service_enabled(request, 'network') and
                      neutron.is_extension_supported(request, 'agent'))
          except Exception:
              exceptions.handle(request, _('Unable to get network agents info.'))
              return False
  
      def get_network_agents_data(self):
          try:
              agents = neutron.agent_list(self.tab_group.request)
          except Exception:
              msg = _('Unable to get network agents list.')
              exceptions.check_message(["Connection", "refused"], msg)
              exceptions.handle(self.request, msg)
              agents = []
          return agents
  
  
  class SystemInfoTabs(tabs.TabGroup):
      slug = "system_info"
      tabs = (ServicesTab, NovaServicesTab, CinderServicesTab,
              NetworkAgentsTab)
      sticky = True
  