forum/views/writers.py

   1 # encoding:utf-8
   2 import os.path
   3
   4 import datetime
   5
   6 from django.core.urlresolvers import reverse
   7 from django.core.files.storage import FileSystemStorage
   8 from django.views.decorators.csrf import csrf_exempt
   9 from django.shortcuts import render_to_response, get_object_or_404
  10 from django.template import RequestContext
  11 from django.http import HttpResponseRedirect, HttpResponse, Http404
  12 from django.utils.html import *
  13 from django.utils.translation import ugettext as _
  14
  15 from django.contrib import messages
  16
  17 from forum.actions import AskAction, AnswerAction, ReviseAction, RollbackAction, RetagAction, AnswerToQuestionAction, CommentToQuestionAction
  18 from forum.forms import *
  19 from forum.models import *
  20 from forum.utils import html
  21 from forum.http_responses import HttpResponseUnauthorized
  22
  23 from vars import PENDING_SUBMISSION_SESSION_ATTR
  24
  25 @csrf_exempt
  26 def upload(request):#ajax upload file to a question or answer
  27     class FileTypeNotAllow(Exception):
  28         pass
  29     class FileSizeNotAllow(Exception):
  30         pass
  31     class UploadPermissionNotAuthorized(Exception):
  32         pass
  33
  34     xml_template = "<result><msg><![CDATA[%s]]></msg><error><![CDATA[%s]]></error><file_url>%s</file_url></result>"
  35
  36     try:
  37         f = request.FILES['file-upload']
  38         # check upload permission
  39         if not request.user.can_upload_files():
  40             raise UploadPermissionNotAuthorized()
  41
  42         # check file type
  43         try:
  44             file_name_suffix = os.path.splitext(f.name)[1].lower()
  45         except KeyError:
  46             raise FileTypeNotAllow()
  47
  48         if not file_name_suffix in ('.jpg', '.jpeg', '.gif', '.png', '.bmp', '.tiff', '.ico'):
  49             raise FileTypeNotAllow()
  50
  51         storage = FileSystemStorage(str(settings.UPFILES_FOLDER), str(settings.UPFILES_ALIAS))
  52         new_file_name = storage.save("_".join(f.name.split()), f)
  53         # check file size
  54         # byte
  55         size = storage.size(new_file_name)
  56
  57         if size > float(settings.ALLOW_MAX_FILE_SIZE) * 1024 * 1024:
  58             storage.delete(new_file_name)
  59             raise FileSizeNotAllow()
  60
  61         result = xml_template % ('Good', '', str(settings.UPFILES_ALIAS) + new_file_name)
  62     except UploadPermissionNotAuthorized:
  63         result = xml_template % ('', _('uploading images is limited to users with >60 reputation points'), '')
  64     except FileTypeNotAllow:
  65         result = xml_template % ('', _("allowed file types are 'jpg', 'jpeg', 'gif', 'bmp', 'png', 'tiff'"), '')
  66     except FileSizeNotAllow:
  67         result = xml_template % ('', _("maximum upload file size is %sM") % settings.ALLOW_MAX_FILE_SIZE, '')
  68     except Exception, e:
  69         result = xml_template % ('', _('Error uploading file. Please contact the site administrator. Thank you. %s' % e), '')
  70
  71     return HttpResponse(result, mimetype="application/xml")
  72
  73 def ask(request):
  74     form = None
  75
  76     if request.POST:
  77         if request.session.pop('reviewing_pending_data', False):
  78             form = AskForm(initial=request.POST, user=request.user)
  79         elif "text" in request.POST:
  80             form = AskForm(request.POST, user=request.user)
  81             if form.is_valid():
  82                 if request.user.is_authenticated() and request.user.email_valid_and_can_ask():
  83                     ask_action = AskAction(user=request.user, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
  84                     question = ask_action.node
  85
  86                     if settings.WIKI_ON and request.POST.get('wiki', False):
  87                         question.nstate.wiki = ask_action
  88
  89                     return HttpResponseRedirect(question.get_absolute_url())
  90                 else:
  91                     request.session[PENDING_SUBMISSION_SESSION_ATTR] = {
  92                         'POST': request.POST,
  93                         'data_name': _("question"),
  94                         'type': 'ask',
  95                         'submission_url': reverse('ask'),
  96                         'time': datetime.datetime.now()
  97                     }
  98
  99                     if request.user.is_authenticated():
 100                         messages.info(request, _("Your question is pending until you %s.") % html.hyperlink(
 101                             reverse('send_validation_email'), _("validate your email")
 102                         ))
 103                         return HttpResponseRedirect(reverse('index'))
 104                     else:
 105                         return HttpResponseRedirect(reverse('auth_signin'))
 106         elif "go" in request.POST:
 107             form = AskForm({'title': request.POST['q']}, user=request.user)
 108
 109     if not form:
 110         form = AskForm(user=request.user)
 111
 112     return render_to_response('ask.html', {
 113         'form' : form,
 114         'tab' : 'ask'
 115         }, context_instance=RequestContext(request))
 116
 117 def convert_to_question(request, id):
 118     user = request.user
 119
 120     node_type = request.GET.get('node_type', 'answer')
 121     if node_type == 'comment':
 122         node = get_object_or_404(Comment, id=id)
 123         action_class = CommentToQuestionAction
 124     else:
 125         node = get_object_or_404(Answer, id=id)
 126         action_class = AnswerToQuestionAction
 127
 128     if not user.can_convert_to_question(node):
 129         return HttpResponseUnauthorized(request)
 130
 131     return _edit_question(request, node, template='node/convert_to_question.html', summary=_("Converted to question"),
 132                            action_class =action_class, allow_rollback=False, url_getter=lambda a: Question.objects.get(id=a.id).get_absolute_url())
 133
 134 def edit_question(request, id):
 135     question = get_object_or_404(Question, id=id)
 136     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 137         raise Http404
 138     if request.user.can_edit_post(question):
 139         return _edit_question(request, question)
 140     elif request.user.can_retag_questions():
 141         return _retag_question(request, question)
 142     else:
 143         raise Http404
 144
 145 def _retag_question(request, question):
 146     if request.method == 'POST':
 147         form = RetagQuestionForm(question, request.POST)
 148         if form.is_valid():
 149             if form.has_changed():
 150                 RetagAction(user=request.user, node=question, ip=request.META['REMOTE_ADDR']).save(data=dict(tagnames=form.cleaned_data['tags']))
 151
 152             return HttpResponseRedirect(question.get_absolute_url())
 153     else:
 154         form = RetagQuestionForm(question)
 155     return render_to_response('question_retag.html', {
 156         'question': question,
 157         'form' : form,
 158         #'tags' : _get_tags_cache_json(),
 159     }, context_instance=RequestContext(request))
 160
 161 def _edit_question(request, question, template='question_edit.html', summary='', action_class=ReviseAction,
 162                    allow_rollback=True, url_getter=lambda q: q.get_absolute_url(), additional_context=None):
 163     if request.method == 'POST':
 164         revision_form = RevisionForm(question, data=request.POST)
 165         revision_form.is_valid()
 166         revision = question.revisions.get(revision=revision_form.cleaned_data['revision'])
 167
 168         if 'select_revision' in request.POST:
 169             form = EditQuestionForm(question, request.user, revision)
 170         else:
 171             form = EditQuestionForm(question, request.user, revision, data=request.POST)
 172
 173         if not 'select_revision' in request.POST and form.is_valid():
 174             if form.has_changed():
 175                 action = action_class(user=request.user, node=question, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
 176
 177                 if settings.WIKI_ON:
 178                     if request.POST.get('wiki', False) and not question.nis.wiki:
 179                         question.nstate.wiki = action
 180                     elif question.nis.wiki and (not request.POST.get('wiki', False)) and request.user.can_cancel_wiki(question):
 181                         question.nstate.wiki = None
 182             else:
 183                 if not revision == question.active_revision:
 184                     if allow_rollback:
 185                         RollbackAction(user=request.user, node=question).save(data=dict(activate=revision))
 186                     else:
 187                         pass
 188
 189             return HttpResponseRedirect(url_getter(question))
 190     else:
 191         revision_form = RevisionForm(question)
 192         form = EditQuestionForm(question, request.user, initial={'summary': summary})
 193
 194     context = {
 195         'question': question,
 196         'revision_form': revision_form,
 197         'form' : form,
 198     }
 199
 200     if not (additional_context is None):
 201         context.update(additional_context)
 202
 203     return render_to_response(template, context, context_instance=RequestContext(request))
 204
 205
 206 def edit_answer(request, id):
 207     answer = get_object_or_404(Answer, id=id)
 208     if answer.deleted and not request.user.can_view_deleted_post(answer):
 209         raise Http404
 210     elif not request.user.can_edit_post(answer):
 211         raise Http404
 212
 213     if request.method == "POST":
 214         revision_form = RevisionForm(answer, data=request.POST)
 215         revision_form.is_valid()
 216         revision = answer.revisions.get(revision=revision_form.cleaned_data['revision'])
 217
 218         if 'select_revision' in request.POST:
 219             form = EditAnswerForm(answer, request.user, revision)
 220         else:
 221             form = EditAnswerForm(answer, request.user, revision, data=request.POST)
 222
 223         if not 'select_revision' in request.POST and form.is_valid():
 224             if form.has_changed():
 225                 action = ReviseAction(user=request.user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=form.cleaned_data)
 226
 227                 if settings.WIKI_ON:
 228                     if request.POST.get('wiki', False) and not answer.nis.wiki:
 229                         answer.nstate.wiki = action
 230                     elif answer.nis.wiki and (not request.POST.get('wiki', False)) and request.user.can_cancel_wiki(answer):
 231                         answer.nstate.wiki = None
 232             else:
 233                 if not revision == answer.active_revision:
 234                     RollbackAction(user=request.user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=dict(activate=revision))
 235
 236             return HttpResponseRedirect(answer.get_absolute_url())
 237
 238     else:
 239         revision_form = RevisionForm(answer)
 240         form = EditAnswerForm(answer, request.user)
 241     return render_to_response('answer_edit.html', {
 242                               'answer': answer,
 243                               'revision_form': revision_form,
 244                               'form': form,
 245                               }, context_instance=RequestContext(request))
 246
 247 def answer(request, id):
 248     question = get_object_or_404(Question, id=id)
 249
 250     if request.POST:
 251         form = AnswerForm(request.POST, request.user)
 252
 253         if request.session.pop('reviewing_pending_data', False) or not form.is_valid():
 254             request.session['redirect_POST_data'] = request.POST
 255             return HttpResponseRedirect(question.get_absolute_url() + '#fmanswer')
 256
 257         if request.user.is_authenticated() and request.user.email_valid_and_can_answer():
 258             answer_action = AnswerAction(user=request.user, ip=request.META['REMOTE_ADDR']).save(dict(question=question, **form.cleaned_data))
 259             answer = answer_action.node
 260
 261             if settings.WIKI_ON and request.POST.get('wiki', False):
 262                 answer.nstate.wiki = answer_action
 263
 264             return HttpResponseRedirect(answer.get_absolute_url())
 265         else:
 266             request.session[PENDING_SUBMISSION_SESSION_ATTR] = {
 267                 'POST': request.POST,
 268                 'data_name': _("answer"),
 269                 'type': 'answer',
 270                 'submission_url': reverse('answer', kwargs={'id': id}),
 271                 'time': datetime.datetime.now()
 272             }
 273
 274             if request.user.is_authenticated():
 275                 messages.info(request, _("Your answer is pending until you %s.") % html.hyperlink(
 276                     reverse('send_validation_email'), _("validate your email")
 277                 ))
 278                 return HttpResponseRedirect(question.get_absolute_url())
 279             else:
 280                 return HttpResponseRedirect(reverse('auth_signin'))
 281
 282     return HttpResponseRedirect(question.get_absolute_url())
 283
 284
 285 def manage_pending_data(request, action, forward=None):
 286     pending_data = request.session.pop(PENDING_SUBMISSION_SESSION_ATTR, None)
 287
 288     if not pending_data:
 289         raise Http404
 290
 291     if action == _("cancel"):
 292         return HttpResponseRedirect(forward or request.META.get('HTTP_REFERER', '/'))
 293     else:
 294         if action == _("review"):
 295             request.session['reviewing_pending_data'] = True
 296
 297         request.session['redirect_POST_data'] = pending_data['POST']
 298         return HttpResponseRedirect(pending_data['submission_url'])
 299
 300