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\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 tab is not None:\r
  17                 context['tab'] = tab\r
  18 \r
  19             return render_to_response(context.pop('template', template), context,\r
  20                                       context_instance=RequestContext(request))\r
  21 \r
  22         if tabbed and tab:\r
  23             ui.register(ui.PAGE_TOP_TABS,\r
  24                         ui.PageTab(tab, tab_title, lambda: reverse(func.__name__), weight=weight))\r
  25             \r
  26         return decorated\r
  27 \r
  28     return decorator\r
  29 \r
  30 def list(paginate, default_page_size):\r
  31     def decorator(func):\r
  32         def decorated(request, *args, **kwargs):\r
  33             context = func(request, *args, **kwargs)\r
  34 \r
  35             pagesize = request.utils.page_size(default_page_size)\r
  36             page = int(request.GET.get('page', 1))\r
  37 \r
  38             big_list = context[paginate]\r
  39             paginator = Paginator(big_list, pagesize)\r
  40 \r
  41             try:\r
  42                 page_obj = paginator.page(page)\r
  43             except EmptyPage:\r
  44                 raise Http404()\r
  45 \r
  46             context[paginate] = page_obj.object_list.lazy()\r
  47 \r
  48             base_path = context.get('base_path', None) or request.path\r
  49             sort = request.utils.sort_method('')\r
  50 \r
  51             context["pagination_context"] = {\r
  52             'is_paginated' : True,\r
  53             'pages': paginator.num_pages,\r
  54             'page': page,\r
  55             'has_previous': page_obj.has_previous(),\r
  56             'has_next': page_obj.has_next(),\r
  57             'previous': page_obj.previous_page_number(),\r
  58             'next': page_obj.next_page_number(),\r
  59             'base_url' : "%s%ssort=%s&" % (base_path, ('?' in base_path) and '&' or '?', sort),\r
  60             'pagesize' : pagesize\r
  61             }\r
  62 \r
  63             context['sort_context'] = {\r
  64             'base_url': "%s%ssort=" % (base_path, ('?' in base_path) and '&' or '?'),\r
  65             'current': sort,\r
  66             }\r
  67 \r
  68             return context\r
  69 \r
  70         return decorated\r
  71 \r
  72     return decorator\r
  73 \r
  74 \r
  75 class CommandException(Exception):\r
  76     pass\r
  77 \r
  78 class RefreshPageCommand(HttpResponse):\r
  79     def __init__(self):\r
  80         super(RefreshPageCommand, self).__init__(\r
  81                 content=simplejson.dumps({'commands': {'refresh_page': []}, 'success': True}),\r
  82                 mimetype="application/json")\r
  83 \r
  84 def command(func):\r
  85     def decorated(request, *args, **kwargs):\r
  86         try:\r
  87             response = func(request, *args, **kwargs)\r
  88 \r
  89             if isinstance(response, HttpResponse):\r
  90                 return response\r
  91 \r
  92             response['success'] = True\r
  93         except Exception, e:\r
  94             import traceback\r
  95             #traceback.print_exc()\r
  96 \r
  97             if isinstance(e, CommandException):\r
  98                 response = {\r
  99                 'success': False,\r
 100                 'error_message': e.message\r
 101                 }\r
 102             else:\r
 103                 logging.error("%s: %s" % (func.__name__, str(e)))\r
 104                 logging.error(traceback.format_exc())\r
 105                 response = {\r
 106                 'success': False,\r
 107                 'error_message': _("We're sorry, but an unknown error ocurred.<br />Please try again in a while.")\r
 108                 }\r
 109 \r
 110         if request.is_ajax():\r
 111             return HttpResponse(simplejson.dumps(response), mimetype="application/json")\r
 112         else:\r
 113             return HttpResponseRedirect(request.META.get('HTTP_REFERER', '/'))\r
 114 \r
 115     return decorated