forum/views/writers.py

   1 # encoding:utf-8
   2 import os.path
   3 import time, datetime, random
   4 import logging
   5 from django.core.files.storage import FileSystemStorage
   6 from django.shortcuts import render_to_response, get_object_or_404
   7 from django.http import HttpResponseRedirect, HttpResponse, Http404
   8 from django.template import RequestContext
   9 from django.utils.html import *
  10 from django.utils import simplejson
  11 from django.utils.translation import ugettext as _
  12 from django.core.urlresolvers import reverse
  13 from django.core.exceptions import PermissionDenied
  14
  15 from forum.actions import AskAction, AnswerAction, ReviseAction, RollbackAction, RetagAction, AnswerToQuestionAction, CommentToQuestionAction
  16 from forum.forms import *
  17 from forum.models import *
  18 from forum.forms import get_next_url
  19 from forum.utils import html
  20 from forum.http_responses import HttpResponseUnauthorized
  21
  22 from vars import PENDING_SUBMISSION_SESSION_ATTR
  23
  24 def upload(request):#ajax upload file to a question or answer
  25     class FileTypeNotAllow(Exception):
  26         pass
  27     class FileSizeNotAllow(Exception):
  28         pass
  29     class UploadPermissionNotAuthorized(Exception):
  30         pass
  31
  32     xml_template = "<result><msg><![CDATA[%s]]></msg><error><![CDATA[%s]]></error><file_url>%s</file_url></result>"
  33
  34     try:
  35         f = request.FILES['file-upload']
  36         # check upload permission
  37         if not request.user.can_upload_files():
  38             raise UploadPermissionNotAuthorized()
  39
  40         # check file type
  41         try:
  42             file_name_suffix = os.path.splitext(f.name)[1].lower()
  43         except KeyError:
  44             raise FileTypeNotAllow()
  45
  46         if not file_name_suffix in ('.jpg', '.jpeg', '.gif', '.png', '.bmp', '.tiff', '.ico'):
  47             raise FileTypeNotAllow()
  48
  49         storage = FileSystemStorage(str(settings.UPFILES_FOLDER), str(settings.UPFILES_ALIAS))
  50         new_file_name = storage.save("_".join(f.name.split()), f)
  51         # check file size
  52         # byte
  53         size = storage.size(new_file_name)
  54
  55         if size > float(settings.ALLOW_MAX_FILE_SIZE) * 1024 * 1024:
  56             storage.delete(new_file_name)
  57             raise FileSizeNotAllow()
  58
  59         result = xml_template % ('Good', '', str(settings.UPFILES_ALIAS) + new_file_name)
  60     except UploadPermissionNotAuthorized:
  61         result = xml_template % ('', _('uploading images is limited to users with >60 reputation points'), '')
  62     except FileTypeNotAllow:
  63         result = xml_template % ('', _("allowed file types are 'jpg', 'jpeg', 'gif', 'bmp', 'png', 'tiff'"), '')
  64     except FileSizeNotAllow:
  65         result = xml_template % ('', _("maximum upload file size is %sM") % settings.ALLOW_MAX_FILE_SIZE, '')
  66     except Exception, e:
  67         result = xml_template % ('', _('Error uploading file. Please contact the site administrator. Thank you. %s' % e), '')
  68
  69     return HttpResponse(result, mimetype="application/xml")
  70
  71 def ask(request):
  72     form = None
  73
  74     if request.POST:
  75         if request.session.pop('reviewing_pending_data', False):
  76             form = AskForm(initial=request.POST, user=request.user)
  77         elif "text" in request.POST:
  78             form = AskForm(request.POST, user=request.user)
  79             if form.is_valid():
  80                 if request.user.is_authenticated() and request.user.email_valid_and_can_ask():
  81                     ask_action = AskAction(user=request.user, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
  82                     question = ask_action.node
  83
  84                     if settings.WIKI_ON and request.POST.get('wiki', False):
  85                         question.nstate.wiki = ask_action
  86
  87                     return HttpResponseRedirect(question.get_absolute_url())
  88                 else:
  89                     request.session[PENDING_SUBMISSION_SESSION_ATTR] = {
  90                         'POST': request.POST,
  91                         'data_name': _("question"),
  92                         'type': 'ask',
  93                         'submission_url': reverse('ask'),
  94                         'time': datetime.datetime.now()
  95                     }
  96
  97                     if request.user.is_authenticated():
  98                         request.user.message_set.create(message=_("Your question is pending until you %s.") % html.hyperlink(
  99                             reverse('send_validation_email'), _("validate your email")
 100                         ))
 101                         return HttpResponseRedirect(reverse('index'))
 102                     else:
 103                         return HttpResponseRedirect(reverse('auth_signin'))
 104         elif "go" in request.POST:
 105             form = AskForm({'title': request.POST['q']}, user=request.user)
 106
 107     if not form:
 108         form = AskForm(user=request.user)
 109
 110     return render_to_response('ask.html', {
 111         'form' : form,
 112         'tab' : 'ask'
 113         }, context_instance=RequestContext(request))
 114
 115 def convert_to_question(request, id):
 116     user = request.user
 117
 118     node_type = request.GET.get('node_type', 'answer')
 119     if node_type == 'comment':
 120         node = get_object_or_404(Comment, id=id)
 121         action_class = CommentToQuestionAction
 122     else:
 123         node = get_object_or_404(Answer, id=id)
 124         action_class = AnswerToQuestionAction
 125
 126     if not user.can_convert_to_question(node):
 127         return HttpResponseUnauthorized(request)
 128
 129     return _edit_question(request, node, template='node/convert_to_question.html', summary=_("Converted to question"),
 130                            action_class =action_class, allow_rollback=False, url_getter=lambda a: Question.objects.get(id=a.id).get_absolute_url())
 131
 132 def edit_question(request, id):
 133     question = get_object_or_404(Question, id=id)
 134     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 135         raise Http404
 136     if request.user.can_edit_post(question):
 137         return _edit_question(request, question)
 138     elif request.user.can_retag_questions():
 139         return _retag_question(request, question)
 140     else:
 141         raise Http404
 142
 143 def _retag_question(request, question):
 144     if request.method == 'POST':
 145         form = RetagQuestionForm(question, request.POST)
 146         if form.is_valid():
 147             if form.has_changed():
 148                 RetagAction(user=request.user, node=question, ip=request.META['REMOTE_ADDR']).save(data=dict(tagnames=form.cleaned_data['tags']))
 149
 150             return HttpResponseRedirect(question.get_absolute_url())
 151     else:
 152         form = RetagQuestionForm(question)
 153     return render_to_response('question_retag.html', {
 154         'question': question,
 155         'form' : form,
 156         #'tags' : _get_tags_cache_json(),
 157     }, context_instance=RequestContext(request))
 158
 159 def _edit_question(request, question, template='question_edit.html', summary='', action_class=ReviseAction, allow_rollback=True, url_getter=lambda q: q.get_absolute_url()):
 160     if request.method == 'POST':
 161         revision_form = RevisionForm(question, data=request.POST)
 162         revision_form.is_valid()
 163         revision = question.revisions.get(revision=revision_form.cleaned_data['revision'])
 164
 165         if 'select_revision' in request.POST:
 166             form = EditQuestionForm(question, request.user, revision)
 167         else:
 168             form = EditQuestionForm(question, request.user, revision, data=request.POST)
 169
 170         if not 'select_revision' in request.POST and form.is_valid():
 171             if form.has_changed():
 172                 action = action_class(user=request.user, node=question, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
 173
 174                 if settings.WIKI_ON:
 175                     if request.POST.get('wiki', False) and not question.nis.wiki:
 176                         question.nstate.wiki = action
 177                     elif question.nis.wiki and (not request.POST.get('wiki', False)) and request.user.can_cancel_wiki(question):
 178                         question.nstate.wiki = None
 179             else:
 180                 if not revision == question.active_revision:
 181                     if allow_rollback:
 182                         RollbackAction(user=request.user, node=question).save(data=dict(activate=revision))
 183                     else:
 184                         pass
 185
 186             return HttpResponseRedirect(url_getter(question))
 187     else:
 188         revision_form = RevisionForm(question)
 189         form = EditQuestionForm(question, request.user, initial={'summary': summary})
 190
 191     return render_to_response(template, {
 192         'question': question,
 193         'revision_form': revision_form,
 194         'form' : form,
 195     }, context_instance=RequestContext(request))
 196
 197
 198 def edit_answer(request, id):
 199     answer = get_object_or_404(Answer, id=id)
 200     if answer.deleted and not request.user.can_view_deleted_post(answer):
 201         raise Http404
 202     elif not request.user.can_edit_post(answer):
 203         raise Http404
 204
 205     if request.method == "POST":
 206         revision_form = RevisionForm(answer, data=request.POST)
 207         revision_form.is_valid()
 208         revision = answer.revisions.get(revision=revision_form.cleaned_data['revision'])
 209
 210         if 'select_revision' in request.POST:
 211             form = EditAnswerForm(answer, request.user, revision)
 212         else:
 213             form = EditAnswerForm(answer, request.user, revision, data=request.POST)
 214
 215         if not 'select_revision' in request.POST and form.is_valid():
 216             if form.has_changed():
 217                 action = ReviseAction(user=request.user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
 218
 219                 if settings.WIKI_ON:
 220                     if request.POST.get('wiki', False) and not answer.nis.wiki:
 221                         answer.nstate.wiki = action
 222                     elif answer.nis.wiki and (not request.POST.get('wiki', False)) and request.user.can_cancel_wiki(answer):
 223                         answer.nstate.wiki = None
 224             else:
 225                 if not revision == answer.active_revision:
 226                     RollbackAction(user=request.user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=dict(activate=revision))
 227
 228             return HttpResponseRedirect(answer.get_absolute_url())
 229
 230     else:
 231         revision_form = RevisionForm(answer)
 232         form = EditAnswerForm(answer, request.user)
 233     return render_to_response('answer_edit.html', {
 234                               'answer': answer,
 235                               'revision_form': revision_form,
 236                               'form': form,
 237                               }, context_instance=RequestContext(request))
 238
 239 def answer(request, id):
 240     question = get_object_or_404(Question, id=id)
 241
 242     if request.POST:
 243         form = AnswerForm(request.POST, request.user)
 244
 245         if request.session.pop('reviewing_pending_data', False) or not form.is_valid():
 246             request.session['redirect_POST_data'] = request.POST
 247             return HttpResponseRedirect(question.get_absolute_url() + '#fmanswer')
 248
 249         if request.user.is_authenticated() and request.user.email_valid_and_can_answer():
 250             answer_action = AnswerAction(user=request.user, ip=request.META['REMOTE_ADDR']).save(dict(question=question, **form.cleaned_data))
 251             answer = answer_action.node
 252
 253             if settings.WIKI_ON and request.POST.get('wiki', False):
 254                 answer.nstate.wiki = answer_action
 255
 256             return HttpResponseRedirect(answer.get_absolute_url())
 257         else:
 258             request.session[PENDING_SUBMISSION_SESSION_ATTR] = {
 259                 'POST': request.POST,
 260                 'data_name': _("answer"),
 261                 'type': 'answer',
 262                 'submission_url': reverse('answer', kwargs={'id': id}),
 263                 'time': datetime.datetime.now()
 264             }
 265
 266             if request.user.is_authenticated():
 267                 request.user.message_set.create(message=_("Your answer is pending until you %s.") % html.hyperlink(
 268                     reverse('send_validation_email'), _("validate your email")
 269                 ))
 270                 return HttpResponseRedirect(question.get_absolute_url())
 271             else:
 272                 return HttpResponseRedirect(reverse('auth_signin'))
 273
 274     return HttpResponseRedirect(question.get_absolute_url())
 275
 276
 277 def manage_pending_data(request, action, forward=None):
 278     pending_data = request.session.pop(PENDING_SUBMISSION_SESSION_ATTR, None)
 279
 280     if not pending_data:
 281         raise Http404
 282
 283     if action == _("cancel"):
 284         return HttpResponseRedirect(forward or request.META.get('HTTP_REFERER', '/'))
 285     else:
 286         if action == _("review"):
 287             request.session['reviewing_pending_data'] = True
 288
 289         request.session['redirect_POST_data'] = pending_data['POST']
 290         return HttpResponseRedirect(pending_data['submission_url'])
 291
 292