text: # 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.conf import settings
  from django import template
  from django.template import defaultfilters as filters
  from django import urls
  from django.utils.translation import pgettext_lazy
  from django.utils.translation import ugettext_lazy as _
  
  from horizon import tables
  from horizon.utils import filters as utils_filters
  from openstack_dashboard import api
  
  
  SERVICE_ENABLED = "enabled"
  SERVICE_DISABLED = "disabled"
  
  SERVICE_STATUS_DISPLAY_CHOICES = (
      (SERVICE_ENABLED, _("Enabled")),
      (SERVICE_DISABLED, _("Disabled")),
  )
  
  SERVICE_STATE_DISPLAY_CHOICES = (
      ('up', _("Up")),
      ('down', _("Down")),
  )
  
  
  class ServiceFilterAction(tables.FilterAction):
      filter_field = 'type'
  
      def filter(self, table, services, filter_string):
          q = filter_string.lower()
  
          def comp(service):
              attr = getattr(service, self.filter_field, '')
              if attr is not None and q in attr.lower():
                  return True
              return False
  
          return filter(comp, services)
  
  
  class SubServiceFilterAction(ServiceFilterAction):
      filter_field = 'binary'
  
  
  def show_endpoints(datanum):
      if 'endpoints' in datanum:
          template_name = 'admin/info/_cell_endpoints_v2.html'
          context = None
          if (datanum['endpoints'] and "publicURL" in datanum['endpoints'][0]):
              context = datanum['endpoints'][0]
          else:
              # this is a keystone v3 version of endpoints
              template_name = 'admin/info/_cell_endpoints_v3.html'
              context = {'endpoints': datanum['endpoints']}
          return template.loader.render_to_string(template_name,
                                                  context)
      return None
  
  
  class ServicesTable(tables.DataTable):
      id = tables.Column('id', hidden=True)
      name = tables.Column("name", verbose_name=_('Name'))
      service_type = tables.Column('type', verbose_name=_('Service'))
      region = tables.Column('region', verbose_name=_('Region'))
      endpoints = tables.Column(show_endpoints, verbose_name=_('Endpoints'))
  
      def get_object_id(self, datum):
          # this method is need b/c the parent impl does not handle dicts
          return datum.get('id')
  
      class Meta(object):
          name = "services"
          verbose_name = _("Services")
          table_actions = (ServiceFilterAction,)
          multi_select = False
  
  
  def get_available(zone):
      return zone.zoneState['available']
  
  
  def get_agent_status(agent):
      template_name = 'admin/info/_cell_status.html'
      context = {
          'status': agent.status,
          'disabled_reason': agent.disabled_reason
      }
      return template.loader.render_to_string(template_name, context)
  
  
  class NovaServicesTable(tables.DataTable):
      binary = tables.Column("binary", verbose_name=_('Name'))
      host = tables.Column('host', verbose_name=_('Host'))
      zone = tables.Column('zone', verbose_name=_('Zone'))
      status = tables.Column(get_agent_status, verbose_name=_('Status'))
      state = tables.Column('state', verbose_name=_('State'),
                            display_choices=SERVICE_STATE_DISPLAY_CHOICES)
      updated_at = tables.Column('updated_at',
                                 verbose_name=pgettext_lazy(
                                     'Time since the last update',
                                     u'Last Updated'),
                                 filters=(utils_filters.parse_isotime,
                                          filters.timesince))
  
      def get_object_id(self, obj):
          return "%s-%s-%s" % (obj.binary, obj.host, obj.zone)
  
      class Meta(object):
          name = "nova_services"
          verbose_name = _("Compute Services")
          table_actions = (SubServiceFilterAction,)
          multi_select = False
  
  
  class CinderServicesTable(tables.DataTable):
      binary = tables.Column("binary", verbose_name=_('Name'))
      host = tables.Column('host', verbose_name=_('Host'))
      zone = tables.Column('zone', verbose_name=_('Zone'))
      status = tables.Column(get_agent_status, verbose_name=_('Status'))
      state = tables.Column('state', verbose_name=_('State'),
                            display_choices=SERVICE_STATE_DISPLAY_CHOICES)
      updated_at = tables.Column('updated_at',
                                 verbose_name=pgettext_lazy(
                                     'Time since the last update',
                                     u'Last Updated'),
                                 filters=(utils_filters.parse_isotime,
                                          filters.timesince))
  
      def get_object_id(self, obj):
          return "%s-%s-%s" % (obj.binary, obj.host, obj.zone)
  
      class Meta(object):
          name = "cinder_services"
          verbose_name = _("Block Storage Services")
          table_actions = (SubServiceFilterAction,)
          multi_select = False
  
  
  class NetworkAgentsFilterAction(tables.FilterAction):
      def filter(self, table, agents, filter_string):
          q = filter_string.lower()
  
          def comp(agent):
              if q in agent.agent_type.lower():
                  return True
              return False
  
          return filter(comp, agents)
  
  
  def get_network_agent_zone(agent):
      if agent.availability_zone:
          return agent.availability_zone
  
      return _('-')
  
  
  def get_network_agent_status(agent):
      if agent.admin_state_up:
          return _('Enabled')
  
      return _('Disabled')
  
  
  def get_network_agent_state(agent):
      if agent.alive:
          return _('Up')
  
      return _('Down')
  
  
  class NetworkL3AgentRoutersLinkAction(tables.LinkAction):
      name = "l3_agent_router_link"
      verbose_name = _("View Routers")
  
      def allowed(self, request, datum):
          network_config = getattr(settings, 'OPENSTACK_NEUTRON_NETWORK', {})
          if not network_config.get('enable_router', True):
              return False
          # Determine whether this action is allowed for the current request.
          return datum.agent_type == "L3 agent"
  
      def get_link_url(self, datum=None):
          obj_id = datum.id
          return urls.reverse("horizon:admin:routers:l3_agent_list",
                              args=(obj_id,))
  
  
  class NetworkAgentsTable(tables.DataTable):
      agent_type = tables.Column('agent_type', verbose_name=_('Type'))
      binary = tables.Column("binary", verbose_name=_('Name'))
      host = tables.Column('host', verbose_name=_('Host'))
      zone = tables.Column(get_network_agent_zone, verbose_name=_('Zone'))
      status = tables.Column(get_network_agent_status, verbose_name=_('Status'))
      state = tables.Column(get_network_agent_state, verbose_name=_('State'))
      heartbeat_timestamp = tables.Column('heartbeat_timestamp',
                                          verbose_name=pgettext_lazy(
                                              'Time since the last update',
                                              u'Last Updated'),
                                          filters=(utils_filters.parse_isotime,
                                                   filters.timesince))
  
      def __init__(self, request, data=None, needs_form_wrapper=None, **kwargs):
          super(NetworkAgentsTable, self).__init__(
              request,
              data=data,
              needs_form_wrapper=needs_form_wrapper,
              **kwargs)
  
          availability_zone_supported = api.neutron.is_extension_supported(
              request,
              "availability_zone")
          if not availability_zone_supported:
              del self.columns["zone"]
  
      def get_object_id(self, obj):
          return "%s-%s" % (obj.binary, obj.host)
  
      class Meta(object):
          name = "network_agents"
          verbose_name = _("Network Agents")
          table_actions = (NetworkAgentsFilterAction, )
          row_actions = (NetworkL3AgentRoutersLinkAction, )
          multi_select = False
  