osqa/forum/middleware/anon_user.py

   1 from django.http import HttpResponseRedirect
   2 from forum.utils.forms import get_next_url
   3 from django.utils.translation import ugettext as _
   4 from forum.user_messages import create_message, get_and_delete_messages
   5 from django.conf import settings
   6 from django.core.urlresolvers import reverse
   7 import logging
   8
   9 class AnonymousMessageManager(object):
  10     def __init__(self,request):
  11         self.request = request
  12     def create(self,message=''):
  13         create_message(self.request,message)
  14     def get_and_delete(self):
  15         messages = get_and_delete_messages(self.request)
  16         return messages
  17
  18 def dummy_deepcopy(*arg):
  19     """this is necessary to prevent deepcopy() on anonymous user object
  20     that now contains reference to request, which cannot be deepcopied
  21     """
  22     return None
  23
  24 class ConnectToSessionMessagesMiddleware(object):
  25     def process_request(self, request):
  26         if not request.user.is_authenticated():
  27             request.user.__deepcopy__ = dummy_deepcopy #plug on deepcopy which may be called by django db "driver"
  28             request.user.message_set = AnonymousMessageManager(request) #here request is linked to anon user
  29             request.user.get_and_delete_messages = request.user.message_set.get_and_delete
  30
  31             #also set the first greeting one time per session only
  32             if 'greeting_set' not in request.session:
  33                 request.session['greeting_set'] = True
  34                 msg = _('First time here? Check out the <a href="%s">FAQ</a>!') % reverse('faq')
  35                 request.user.message_set.create(message=msg)