text: # Copyright 2012 United States Government as represented by the
  # Administrator of the National Aeronautics and Space Administration.
  # All Rights Reserved.
  #
  # 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.
  
  """
  Views for managing instances.
  """
  from django.core.urlresolvers import reverse
  from django.core.urlresolvers import reverse_lazy
  from django import http
  from django import shortcuts
  from django.utils.datastructures import SortedDict
  from django.utils.translation import ugettext_lazy as _
  
  from horizon import exceptions
  from horizon import forms
  from horizon import tables
  from horizon import tabs
  from horizon.utils import memoized
  from horizon import workflows
  
  from openstack_dashboard import api
  
  from openstack_dashboard.dashboards.project.instances \
      import console as project_console
  from openstack_dashboard.dashboards.project.instances \
      import forms as project_forms
  from openstack_dashboard.dashboards.project.instances \
      import tables as project_tables
  from openstack_dashboard.dashboards.project.instances \
      import tabs as project_tabs
  from openstack_dashboard.dashboards.project.instances \
      import workflows as project_workflows
  
  
  class IndexView(tables.DataTableView):
      table_class = project_tables.InstancesTable
      template_name = 'project/instances/index.html'
  
      def has_more_data(self, table):
          return self._more
  
      def get_data(self):
          marker = self.request.GET.get(
              project_tables.InstancesTable._meta.pagination_param, None)
          # Gather our instances
          try:
              instances, self._more = api.nova.server_list(
                  self.request,
                  search_opts={'marker': marker,
                               'paginate': True})
          except Exception:
              self._more = False
              instances = []
              exceptions.handle(self.request,
                                _('Unable to retrieve instances.'))
  
          if instances:
              try:
                  api.network.servers_update_addresses(self.request, instances)
              except Exception:
                  exceptions.handle(
                      self.request,
                      message=_('Unable to retrieve IP addresses from Neutron.'),
                      ignore=True)
  
              # Gather our flavors and images and correlate our instances to them
              try:
                  flavors = api.nova.flavor_list(self.request)
              except Exception:
                  flavors = []
                  exceptions.handle(self.request, ignore=True)
  
              try:
                  # TODO(gabriel): Handle pagination.
                  images, more = api.glance.image_list_detailed(self.request)
              except Exception:
                  images = []
                  exceptions.handle(self.request, ignore=True)
  
              full_flavors = SortedDict([(str(flavor.id), flavor)
                                         for flavor in flavors])
              image_map = SortedDict([(str(image.id), image)
                                      for image in images])
  
              # Loop through instances to get flavor info.
              for instance in instances:
                  if hasattr(instance, 'image'):
                      # Instance from image returns dict
                      if isinstance(instance.image, dict):
                          if instance.image.get('id') in image_map:
                              instance.image = image_map[instance.image['id']]
  
                  try:
                      flavor_id = instance.flavor["id"]
                      if flavor_id in full_flavors:
                          instance.full_flavor = full_flavors[flavor_id]
                      else:
                          # If the flavor_id is not in full_flavors list,
                          # get it via nova api.
                          instance.full_flavor = api.nova.flavor_get(
                              self.request, flavor_id)
                  except Exception:
                      msg = _('Unable to retrieve instance size information.')
                      exceptions.handle(self.request, msg)
          return instances
  
  
  class LaunchInstanceView(workflows.WorkflowView):
      workflow_class = project_workflows.LaunchInstance
  
      def get_initial(self):
          initial = super(LaunchInstanceView, self).get_initial()
          initial['project_id'] = self.request.user.tenant_id
          initial['user_id'] = self.request.user.id
          return initial
  
  
  def console(request, instance_id):
      try:
          # TODO(jakedahn): clean this up once the api supports tailing.
          tail = request.GET.get('length', None)
          data = api.nova.server_console_output(request,
                                                instance_id,
                                                tail_length=tail)
      except Exception:
          data = _('Unable to get log for instance "%s".') % instance_id
          exceptions.handle(request, ignore=True)
      response = http.HttpResponse(content_type='text/plain')
      response.write(data)
      response.flush()
      return response
  
  
  def vnc(request, instance_id):
      try:
          instance = api.nova.server_get(request, instance_id)
          console_url = project_console.get_console(request, 'VNC', instance)
          return shortcuts.redirect(console_url)
      except Exception:
          redirect = reverse("horizon:project:instances:index")
          msg = _('Unable to get VNC console for instance "%s".') % instance_id
          exceptions.handle(request, msg, redirect=redirect)
  
  
  def spice(request, instance_id):
      try:
          instance = api.nova.server_get(request, instance_id)
          console_url = project_console.get_console(request, 'SPICE', instance)
          return shortcuts.redirect(console_url)
      except Exception:
          redirect = reverse("horizon:project:instances:index")
          msg = _('Unable to get SPICE console for instance "%s".') % instance_id
          exceptions.handle(request, msg, redirect=redirect)
  
  
  def rdp(request, instance_id):
      try:
          instance = api.nova.server_get(request, instance_id)
          console_url = project_console.get_console(request, 'RDP', instance)
          return shortcuts.redirect(console_url)
      except Exception:
          redirect = reverse("horizon:project:instances:index")
          msg = _('Unable to get RDP console for instance "%s".') % instance_id
          exceptions.handle(request, msg, redirect=redirect)
  
  
  class UpdateView(workflows.WorkflowView):
      workflow_class = project_workflows.UpdateInstance
      success_url = reverse_lazy("horizon:project:instances:index")
  
      def get_context_data(self, **kwargs):
          context = super(UpdateView, self).get_context_data(**kwargs)
          context["instance_id"] = self.kwargs['instance_id']
          return context
  
      @memoized.memoized_method
      def get_object(self, *args, **kwargs):
          instance_id = self.kwargs['instance_id']
          try:
              return api.nova.server_get(self.request, instance_id)
          except Exception:
              redirect = reverse("horizon:project:instances:index")
              msg = _('Unable to retrieve instance details.')
              exceptions.handle(self.request, msg, redirect=redirect)
  
      def get_initial(self):
          initial = super(UpdateView, self).get_initial()
          initial.update({'instance_id': self.kwargs['instance_id'],
                  'name': getattr(self.get_object(), 'name', '')})
          return initial
  
  
  class RebuildView(forms.ModalFormView):
      form_class = project_forms.RebuildInstanceForm
      template_name = 'project/instances/rebuild.html'
      success_url = reverse_lazy('horizon:project:instances:index')
  
      def get_context_data(self, **kwargs):
          context = super(RebuildView, self).get_context_data(**kwargs)
          context['instance_id'] = self.kwargs['instance_id']
          context['can_set_server_password'] = api.nova.can_set_server_password()
          return context
  
      def get_initial(self):
          return {'instance_id': self.kwargs['instance_id']}
  
  
  class DecryptPasswordView(forms.ModalFormView):
      form_class = project_forms.DecryptPasswordInstanceForm
      template_name = 'project/instances/decryptpassword.html'
      success_url = reverse_lazy('horizon:project:instances:index')
  
      def get_context_data(self, **kwargs):
          context = super(DecryptPasswordView, self).get_context_data(**kwargs)
          context['instance_id'] = self.kwargs['instance_id']
          context['keypair_name'] = self.kwargs['keypair_name']
          return context
  
      def get_initial(self):
          return {'instance_id': self.kwargs['instance_id'],
                  'keypair_name': self.kwargs['keypair_name']}
  
  
  class DetailView(tabs.TabView):
      tab_group_class = project_tabs.InstanceDetailTabs
      template_name = 'project/instances/detail.html'
      redirect_url = 'horizon:project:instances:index'
  
      def get_context_data(self, **kwargs):
          context = super(DetailView, self).get_context_data(**kwargs)
          context["instance"] = self.get_data()
          return context
  
      @memoized.memoized_method
      def get_data(self):
          try:
              instance_id = self.kwargs['instance_id']
              instance = api.nova.server_get(self.request, instance_id)
              instance.volumes = api.nova.instance_volumes_list(self.request,
                                                                instance_id)
              # Sort by device name
              instance.volumes.sort(key=lambda vol: vol.device)
              instance.full_flavor = api.nova.flavor_get(
                  self.request, instance.flavor["id"])
              instance.security_groups = api.network.server_security_groups(
                  self.request, instance_id)
          except Exception:
              redirect = reverse(self.redirect_url)
              exceptions.handle(self.request,
                                _('Unable to retrieve details for '
                                  'instance "%s".') % instance_id,
                                  redirect=redirect)
              # Not all exception types handled above will result in a redirect.
              # Need to raise here just in case.
              raise exceptions.Http302(redirect)
          try:
              api.network.servers_update_addresses(self.request, [instance])
          except Exception:
              exceptions.handle(
                  self.request,
                  _('Unable to retrieve IP addresses from Neutron for instance '
                    '"%s".') % instance_id, ignore=True)
          return instance
  
      def get_tabs(self, request, *args, **kwargs):
          instance = self.get_data()
          return self.tab_group_class(request, instance=instance, **kwargs)
  
  
  class ResizeView(workflows.WorkflowView):
      workflow_class = project_workflows.ResizeInstance
      success_url = reverse_lazy("horizon:project:instances:index")
  
      def get_context_data(self, **kwargs):
          context = super(ResizeView, self).get_context_data(**kwargs)
          context["instance_id"] = self.kwargs['instance_id']
          return context
  
      @memoized.memoized_method
      def get_object(self, *args, **kwargs):
          instance_id = self.kwargs['instance_id']
          try:
              instance = api.nova.server_get(self.request, instance_id)
              flavor_id = instance.flavor['id']
              flavors = self.get_flavors()
              if flavor_id in flavors:
                  instance.flavor_name = flavors[flavor_id].name
              else:
                  flavor = api.nova.flavor_get(self.request, flavor_id)
                  instance.flavor_name = flavor.name
          except Exception:
              redirect = reverse("horizon:project:instances:index")
              msg = _('Unable to retrieve instance details.')
              exceptions.handle(self.request, msg, redirect=redirect)
          return instance
  
      @memoized.memoized_method
      def get_flavors(self, *args, **kwargs):
          try:
              flavors = api.nova.flavor_list(self.request)
              return SortedDict((str(flavor.id), flavor) for flavor in flavors)
          except Exception:
              redirect = reverse("horizon:project:instances:index")
              exceptions.handle(self.request,
                  _('Unable to retrieve flavors.'), redirect=redirect)
  
      def get_initial(self):
          initial = super(ResizeView, self).get_initial()
          _object = self.get_object()
          if _object:
              initial.update({'instance_id': self.kwargs['instance_id'],
                  'name': getattr(_object, 'name', None),
                  'old_flavor_id': _object.flavor['id'],
                  'old_flavor_name': getattr(_object, 'flavor_name', ''),
                  'flavors': self.get_flavors()})
          return initial
  