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