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  # Copyright 2011 United States Government as represented by the
  # Administrator of the National Aeronautics and Space Administration.
  # All Rights Reserved.
  #
  # Copyright 2011 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.
  
  """
  Views for managing Swift containers.
  """
  import logging
  
  from django import template
  from django.contrib import messages
  from django.contrib.auth.decorators import login_required
  from django import shortcuts
  
  from django_openstack import api
  from django_openstack import forms
  
  from cloudfiles.errors import ContainerNotEmpty
  
  
  LOG = logging.getLogger('django_openstack.dash')
  
  
  class DeleteContainer(forms.SelfHandlingForm):
      container_name = forms.CharField(widget=forms.HiddenInput())
  
      def handle(self, request, data):
          try:
              api.swift_delete_container(request, data['container_name'])
          except ContainerNotEmpty, e:
              messages.error(request,
                             'Unable to delete non-empty container: %s' % \
                             data['container_name'])
              LOG.exception('Unable to delete container "%s".  Exception: "%s"' %
                        (data['container_name'], str(e)))
          else:
              messages.info(request,
                        'Successfully deleted container: %s' % \
                        data['container_name'])
          return shortcuts.redirect(request.build_absolute_uri())
  
  
  class CreateContainer(forms.SelfHandlingForm):
      name = forms.CharField(max_length="255", label="Container Name")
  
      def handle(self, request, data):
          api.swift_create_container(request, data['name'])
          messages.success(request, "Container was successfully created.")
          return shortcuts.redirect("dash_containers", request.user.tenant_id)
  
  
  @login_required
  def index(request, tenant_id):
      delete_form, handled = DeleteContainer.maybe_handle(request)
      if handled:
          return handled
  
      containers = api.swift_get_containers(request)
  
      return shortcuts.render_to_response(
      'django_openstack/dash/containers/index.html', {
          'containers': containers,
          'delete_form': delete_form,
      }, context_instance=template.RequestContext(request))
  
  
  @login_required
  def create(request, tenant_id):
      form, handled = CreateContainer.maybe_handle(request)
      if handled:
          return handled
  
      return shortcuts.render_to_response(
      'django_openstack/dash/containers/create.html', {
          'create_form': form,
      }, context_instance=template.RequestContext(request))
  