forum/views/writers.py

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