forum/views/decorators.py

   1 # -*- coding: utf-8 -*-
   2 import json
   3 import logging
   4
   5 from datetime import datetime
   6
   7 from django.http import HttpResponse, HttpResponseRedirect
   8 from django.shortcuts import render_to_response
   9 from django.core.urlresolvers import reverse
  10 from django.template import RequestContext
  11 from django.utils.translation import ugettext as _
  12
  13 from forum.modules import ui, decorate
  14 from forum.settings import ONLINE_USERS
  15
  16 def login_required(func, request, *args, **kwargs):
  17     if not request.user.is_authenticated():
  18         return HttpResponseRedirect(reverse('auth_signin'))
  19     else:
  20         return func(request, *args, **kwargs)
  21
  22 def render(template=None, tab=None, tab_title='', weight=500, tabbed=True):
  23     def decorator(func):
  24         def decorated(context, request, *args, **kwargs):
  25             if request.user.is_authenticated():
  26                 ONLINE_USERS[request.user] = datetime.now()
  27
  28             if isinstance(context, HttpResponse):
  29                 return context
  30
  31             if tab is not None:
  32                 context['tab'] = tab
  33
  34             return render_to_response(context.pop('template', template), context,
  35                                       context_instance=RequestContext(request))
  36
  37         if tabbed and tab and tab_title:
  38             ui.register(ui.PAGE_TOP_TABS,
  39                         ui.PageTab(tab, tab_title, lambda: reverse(func.__name__), weight=weight))
  40
  41         return decorate.result.withfn(decorated, needs_params=True)(func)
  42
  43     return decorator
  44
  45 class CommandException(Exception):
  46     pass
  47
  48 class RefreshPageCommand(HttpResponse):
  49     def __init__(self):
  50         super(RefreshPageCommand, self).__init__(
  51                 content=json.dumps({'commands': {'refresh_page': []}, 'success': True}),
  52                 mimetype="application/json")
  53
  54 def command(func, request, *args, **kwargs):
  55     try:
  56         response = func(request, *args, **kwargs)
  57
  58         if isinstance(response, HttpResponse):
  59             return response
  60
  61         response['success'] = True
  62     except Exception, e:
  63         import traceback
  64         #traceback.print_exc()
  65
  66         if isinstance(e, CommandException):
  67             response = {
  68             'success': False,
  69             'error_message': e.message
  70             }
  71         else:
  72             logging.error("%s: %s" % (func.__name__, str(e)))
  73             logging.error(traceback.format_exc())
  74             response = {
  75             'success': False,
  76             'error_message': _("We're sorry, but an unknown error ocurred.<br />Please try again in a while.")
  77             }
  78
  79     if request.is_ajax():
  80         return HttpResponse(json.dumps(response), mimetype="application/json")
  81     else:
  82         return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))
  83