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