forum/views/decorators.py

   1 from django.http import HttpResponse, HttpResponseRedirect, Http404\r
   2 from django.utils import simplejson\r
   3 from django.core.paginator import Paginator, EmptyPage\r
   4 from django.shortcuts import render_to_response\r
   5 from django.core.urlresolvers import reverse\r
   6 from django.template import RequestContext\r
   7 from django.utils.translation import ungettext, ugettext as _\r
   8 from forum.modules import ui, decorate\r
   9 import logging\r
  10 \r
  11 def render(template=None, tab=None, tab_title='', weight=500, tabbed=True):\r
  12     def decorator(func):\r
  13         def decorated(request, *args, **kwargs):\r
  14             context = func(request, *args, **kwargs)\r
  15 \r
  16             if isinstance(context, HttpResponse):\r
  17                 return context\r
  18 \r
  19             if tab is not None:\r
  20                 context['tab'] = tab\r
  21 \r
  22             return render_to_response(context.pop('template', template), context,\r
  23                                       context_instance=RequestContext(request))\r
  24 \r
  25         if tabbed and tab:\r
  26             ui.register(ui.PAGE_TOP_TABS,\r
  27                         ui.PageTab(tab, tab_title, lambda: reverse(func.__name__), weight=weight))\r
  28             \r
  29         return decorated\r
  30 \r
  31     return decorator\r
  32 \r
  33 class CommandException(Exception):\r
  34     pass\r
  35 \r
  36 class RefreshPageCommand(HttpResponse):\r
  37     def __init__(self):\r
  38         super(RefreshPageCommand, self).__init__(\r
  39                 content=simplejson.dumps({'commands': {'refresh_page': []}, 'success': True}),\r
  40                 mimetype="application/json")\r
  41 \r
  42 def command(func, request, *args, **kwargs):\r
  43     try:\r
  44         response = func(request, *args, **kwargs)\r
  45 \r
  46         if isinstance(response, HttpResponse):\r
  47             return response\r
  48 \r
  49         response['success'] = True\r
  50     except Exception, e:\r
  51         import traceback\r
  52         #traceback.print_exc()\r
  53 \r
  54         if isinstance(e, CommandException):\r
  55             response = {\r
  56             'success': False,\r
  57             'error_message': e.message\r
  58             }\r
  59         else:\r
  60             logging.error("%s: %s" % (func.__name__, str(e)))\r
  61             logging.error(traceback.format_exc())\r
  62             response = {\r
  63             'success': False,\r
  64             'error_message': _("We're sorry, but an unknown error ocurred.<br />Please try again in a while.")\r
  65             }\r
  66 \r
  67     if request.is_ajax():\r
  68         return HttpResponse(simplejson.dumps(response), mimetype="application/json")\r
  69     else:\r
  70         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))\r
  71 \r