forum/views/writers.py

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