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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.
  
  import logging
  
  from django import http
  from django import shortcuts
  from django.contrib import messages
  from django.core import validators
  from django.template.defaultfilters import slugify
  from django.utils.translation import ugettext as _
  from novaclient import exceptions as novaclient_exceptions
  
  from horizon import api
  from horizon import forms
  
  
  LOG = logging.getLogger(__name__)
  
  
  class CreateKeypair(forms.SelfHandlingForm):
      name = forms.CharField(max_length="20",
                             label=_("Keypair Name"),
                             validators=[validators.validate_slug],
                             error_messages={'invalid': _('Keypair names may '
                                  'only contain letters, numbers, underscores '
                                  'and hyphens.')})
  
      def handle(self, request, data):
          try:
              LOG.info('Creating keypair "%s"' % data['name'])
              keypair = api.keypair_create(request, data['name'])
              response = http.HttpResponse(mimetype='application/binary')
              response['Content-Disposition'] = \
                       'attachment; filename=%s.pem' % slugify(keypair.name)
              response.write(keypair.private_key)
              response['Content-Length'] = str(len(response.content))
              return response
          except novaclient_exceptions.ClientException, e:
              LOG.exception("ClientException in CreateKeyPair")
              messages.error(request,
                             _('Error Creating Keypair: %s') % e.message)
              return shortcuts.redirect(request.build_absolute_uri())
  
  
  class ImportKeypair(forms.SelfHandlingForm):
      name = forms.CharField(max_length="20", label=_("Keypair Name"),
                   validators=[validators.RegexValidator('\w+')])
      public_key = forms.CharField(label=_("Public Key"), widget=forms.Textarea)
  
      def handle(self, request, data):
          try:
              LOG.info('Importing keypair "%s"' % data['name'])
              api.keypair_import(request, data['name'], data['public_key'])
              messages.success(request, _('Successfully imported public key: %s')
                                         % data['name'])
              return shortcuts.redirect(
                              'horizon:nova:access_and_security:index')
          except novaclient_exceptions.ClientException, e:
              LOG.exception("ClientException in ImportKeypair")
              messages.error(request,
                             _('Error Importing Keypair: %s') % e.message)
              return shortcuts.redirect(request.build_absolute_uri())
  