text: # -*- coding: utf-8 -*-
  import json
  import logging
  
  from datetime import datetime
  
  from django.http import HttpResponse, HttpResponseRedirect
  from django.shortcuts import render_to_response
  from django.core.urlresolvers import reverse
  from django.template import RequestContext
  from django.utils.translation import ugettext as _
  
  from forum.modules import ui, decorate
  from forum.settings import ONLINE_USERS
  
  def login_required(func, request, *args, **kwargs):
      if not request.user.is_authenticated():
          return HttpResponseRedirect(reverse('auth_signin'))
      else:
          return func(request, *args, **kwargs)
  
  def render(template=None, tab=None, tab_title='', weight=500, tabbed=True):
      def decorator(func):        
          def decorated(context, request, *args, **kwargs):
              if request.user.is_authenticated():
                  ONLINE_USERS[request.user] = datetime.now()
  
              if isinstance(context, HttpResponse):
                  return context
  
              if tab is not None:
                  context['tab'] = tab
  
              return render_to_response(context.pop('template', template), context,
                                        context_instance=RequestContext(request))
  
          if tabbed and tab and tab_title:
              ui.register(ui.PAGE_TOP_TABS,
                          ui.PageTab(tab, tab_title, lambda: reverse(func.__name__), weight=weight))
              
          return decorate.result.withfn(decorated, needs_params=True)(func)
  
      return decorator
  
  class CommandException(Exception):
      pass
  
  class RefreshPageCommand(HttpResponse):
      def __init__(self):
          super(RefreshPageCommand, self).__init__(
                  content=json.dumps({'commands': {'refresh_page': []}, 'success': True}),
                  mimetype="application/json")
  
  def command(func, request, *args, **kwargs):
      try:
          response = func(request, *args, **kwargs)
  
          if isinstance(response, HttpResponse):
              return response
  
          response['success'] = True
      except Exception, e:
          import traceback
          #traceback.print_exc()
  
          if isinstance(e, CommandException):
              response = {
              'success': False,
              'error_message': e.message
              }
          else:
              logging.error("%s: %s" % (func.__name__, str(e)))
              logging.error(traceback.format_exc())
              response = {
              'success': False,
              'error_message': _("We're sorry, but an unknown error ocurred.<br />Please try again in a while.")
              }
  
      if request.is_ajax():
          return HttpResponse(json.dumps(response), mimetype="application/json")
      else:
          return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
  
  