text: # Copyright 2018 ETH Zurich
  #
  # 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.http import HttpResponse
  from django.views import View
  
  
  class PlaceholderView(View):
      def get(self, request, *args, **kwargs):
          if request.user.id:
              return HttpResponse(
                  'Hello, this is a placeholder. You are logged in as %s.'
                  % request.user.username
              )
          else:
              return HttpResponse('Hello, this is a placeholder. You are not logged in.')
  