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