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.core.urlresolvers import reverse
  from django.core.urlresolvers import reverse_lazy
  from django.utils.translation import ugettext_lazy as _
  
  from horizon import exceptions
  from horizon import forms
  from horizon import tabs
  from horizon.utils import memoized
  
  from openstack_dashboard import api
  from openstack_dashboard.dashboards.project.volumes.backups \
      import forms as backup_forms
  from openstack_dashboard.dashboards.project.volumes.backups \
      import tables as backup_tables
  from openstack_dashboard.dashboards.project.volumes.backups \
      import tabs as backup_tabs
  
  
  class CreateBackupView(forms.ModalFormView):
      form_class = backup_forms.CreateBackupForm
      modal_header = _("Create Volume Backup")
      template_name = 'project/volumes/backups/create_backup.html'
      submit_label = _("Create Volume Backup")
      submit_url = "horizon:project:volumes:volumes:create_backup"
      success_url = reverse_lazy("horizon:project:volumes:backups_tab")
      page_title = _("Create a Volume Backup")
  
      def get_context_data(self, **kwargs):
          context = super(CreateBackupView, self).get_context_data(**kwargs)
          context['volume_id'] = self.kwargs['volume_id']
          args = (self.kwargs['volume_id'],)
          context['submit_url'] = reverse(self.submit_url, args=args)
          return context
  
      def get_initial(self):
          return {"volume_id": self.kwargs["volume_id"]}
  
  
  class BackupDetailView(tabs.TabView):
      tab_group_class = backup_tabs.BackupDetailTabs
      template_name = 'horizon/common/_detail.html'
      page_title = "{{ backup.name|default:backup.id }}"
  
      def get_context_data(self, **kwargs):
          context = super(BackupDetailView, self).get_context_data(**kwargs)
          backup = self.get_data()
          table = backup_tables.BackupsTable(self.request)
          context["backup"] = backup
          context["url"] = self.get_redirect_url()
          context["actions"] = table.render_row_actions(backup)
          return context
  
      @memoized.memoized_method
      def get_data(self):
          try:
              backup_id = self.kwargs['backup_id']
              backup = api.cinder.volume_backup_get(self.request,
                                                    backup_id)
          except Exception:
              exceptions.handle(self.request,
                                _('Unable to retrieve backup details.'),
                                redirect=self.get_redirect_url())
          return backup
  
      def get_tabs(self, request, *args, **kwargs):
          backup = self.get_data()
          return self.tab_group_class(request, backup=backup, **kwargs)
  
      @staticmethod
      def get_redirect_url():
          return reverse('horizon:project:volumes:index')
  
  
  class RestoreBackupView(forms.ModalFormView):
      form_class = backup_forms.RestoreBackupForm
      modal_header = _("Restore Volume Backup")
      template_name = 'project/volumes/backups/restore_backup.html'
      submit_label = _("Restore Backup to Volume")
      submit_url = "horizon:project:volumes:backups:restore"
      success_url = reverse_lazy('horizon:project:volumes:index')
      page_title = _("Restore a Volume Backup")
  
      def get_context_data(self, **kwargs):
          context = super(RestoreBackupView, self).get_context_data(**kwargs)
          context['backup_id'] = self.kwargs['backup_id']
          args = (self.kwargs['backup_id'],)
          context['submit_url'] = reverse(self.submit_url, args=args)
          return context
  
      def get_initial(self):
          backup_id = self.kwargs['backup_id']
          backup_name = self.request.GET.get('backup_name')
          volume_id = self.request.GET.get('volume_id')
          return {
              'backup_id': backup_id,
              'backup_name': backup_name,
              'volume_id': volume_id,
          }
  