forum/views/commands.py

   1 import datetime
   2 from django.conf import settings
   3 from django.core.exceptions import ObjectDoesNotExist
   4 from django.utils import simplejson
   5 from django.http import HttpResponse, HttpResponseRedirect, HttpResponseForbidden
   6 from django.shortcuts import get_object_or_404, render_to_response
   7 from django.utils.translation import ungettext, ugettext as _
   8 from django.template import RequestContext
   9 from forum.models import *
  10 from forum.forms import CloseForm
  11 from django.core.urlresolvers import reverse
  12 from django.contrib.auth.decorators import login_required
  13 from forum.utils.decorators import ajax_method, ajax_login_required
  14 from decorators import command
  15 import logging
  16
  17 class NotEnoughRepPointsException(Exception):
  18     def __init__(self, action):
  19         super(NotEnoughRepPointsException, self).__init__(
  20             _("""
  21             Sorry, but you don't have enough reputation points to %(action)s.<br />
  22             Please check the <a href'%(faq_url)s'>faq</a>
  23             """ % {'action': action, 'faq_url': reverse('faq')})
  24         )
  25
  26 class CannotDoOnOwnException(Exception):
  27     def __init__(self, action):
  28         super(CannotDoOnOwnException, self).__init__(
  29             _("""
  30             Sorry but you cannot %(action)s your own post.<br />
  31             Please check the <a href'%(faq_url)s'>faq</a>
  32             """ % {'action': action, 'faq_url': reverse('faq')})
  33         )
  34
  35 class AnonymousNotAllowedException(Exception):
  36     def __init__(self, action):
  37         super(AnonymousNotAllowedException, self).__init__(
  38             _("""
  39             Sorry but anonymous users cannot %(action)s.<br />
  40             Please login or create an account <a href'%(signin_url)s'>here</a>.
  41             """ % {'action': action, 'signin_url': reverse('auth_signin')})
  42         )
  43
  44 class NotEnoughLeftException(Exception):
  45     def __init__(self, action, limit):
  46         super(NotEnoughRepPointsException, self).__init__(
  47             _("""
  48             Sorry, but you don't have enough %(action)s left for today..<br />
  49             The limit is %(limit)s per day..<br />
  50             Please check the <a href'%(faq_url)s'>faq</a>
  51             """ % {'action': action, 'limit': limit, 'faq_url': reverse('faq')})
  52         )
  53
  54 class CannotDoubleActionException(Exception):
  55     def __init__(self, action):
  56         super(CannotDoubleActionException, self).__init__(
  57             _("""
  58             Sorry, but you cannot %(action)s twice the same post.<br />
  59             Please check the <a href'%(faq_url)s'>faq</a>
  60             """ % {'action': action, 'faq_url': reverse('faq')})
  61         )
  62
  63
  64 @command
  65 def vote_post(request, post_type, id, vote_type):
  66     post = get_object_or_404(post_type == "question" and Question or Answer, id=id)
  67     vote_score = vote_type == 'up' and 1 or -1
  68     user = request.user
  69
  70     if not user.is_authenticated():
  71         raise AnonymousNotAllowedException(_('vote'))
  72
  73     if user == post.author:
  74         raise CannotDoOnOwnException(_('vote'))
  75
  76     if not (vote_type == 'up' and user.can_vote_up() or user.can_vote_down()):
  77         raise NotEnoughRepPointsException(vote_type == 'up' and _('upvote') or _('downvote'))
  78
  79     user_vote_count_today = user.get_vote_count_today()
  80
  81     if user_vote_count_today >= int(settings.MAX_VOTES_PER_DAY):
  82         raise NotEnoughLeftException(_('votes'), str(settings.MAX_VOTES_PER_DAY))
  83
  84     try:
  85         vote = post.votes.get(canceled=False, user=user)
  86
  87         if vote.voted_at < datetime.datetime.now() - datetime.timedelta(days=int(settings.DENY_UNVOTE_DAYS)):
  88             raise Exception(
  89                     _("Sorry but you cannot cancel a vote after %(ndays)d %(tdays)s from the original vote") %
  90                     {'ndays': int(settings.DENY_UNVOTE_DAYS), 'tdays': ungettext('day', 'days', int(settings.DENY_UNVOTE_DAYS))}
  91             )
  92
  93         vote.cancel()
  94         vote_type = 'none'
  95     except ObjectDoesNotExist:
  96         #there is no vote yet
  97         vote = Vote(user=user, content_object=post, vote=vote_score)
  98         vote.save()
  99
 100     response = {
 101         'commands': {
 102             'update_post_score': [post_type, id, vote.vote * (vote_type == 'none' and -1 or 1)],
 103             'update_user_post_vote': [post_type, id, vote_type]
 104         }
 105     }
 106
 107     votes_left = int(settings.MAX_VOTES_PER_DAY) - user_vote_count_today + (vote_type == 'none' and -1 or 1)
 108
 109     if int(settings.START_WARN_VOTES_LEFT) >= votes_left:
 110         response['message'] = _("You have %(nvotes) %(tvotes) left today.") % \
 111                     {'nvotes': votes_left, 'tvotes': ungettext('vote', 'votes', votes_left)}
 112
 113     return response
 114
 115 @command
 116 def flag_post(request, post_type, id):
 117     post = get_object_or_404(post_type == "question" and Question or Answer, id=id)
 118     user = request.user
 119
 120     if not user.is_authenticated():
 121         raise AnonymousNotAllowedException(_('flag posts'))
 122
 123     if user == post.author:
 124         raise CannotDoOnOwnException(_('flag'))
 125
 126     if not (user.can_flag_offensive(post)):
 127         raise NotEnoughRepPointsException(_('flag posts'))
 128
 129     user_flag_count_today = user.get_flagged_items_count_today()
 130
 131     if user_flag_count_today >= int(settings.MAX_FLAGS_PER_DAY):
 132         raise NotEnoughLeftException(_('flags'), str(settings.MAX_FLAGS_PER_DAY))
 133
 134     try:
 135         post.flagged_items.get(user=user)
 136         raise CannotDoubleActionException(_('flag'))
 137     except ObjectDoesNotExist:
 138         #there is no vote yet
 139         flag = FlaggedItem(user=user, content_object=post)
 140         flag.save()
 141
 142     response = {
 143
 144     }
 145
 146     return response
 147
 148 @command
 149 def like_comment(request, id):
 150     comment = get_object_or_404(Comment, id=id)
 151     user = request.user
 152
 153     if not user.is_authenticated():
 154         raise AnonymousNotAllowedException(_('like comments'))
 155
 156     if user == comment.user:
 157         raise CannotDoOnOwnException(_('like'))
 158
 159     if not user.can_like_comment(comment):
 160         raise NotEnoughRepPointsException( _('like comments'))
 161
 162     try:
 163         like = LikedComment.active.get(comment=comment, user=user)
 164         like.cancel()
 165         likes = False
 166     except ObjectDoesNotExist:
 167         like = LikedComment(comment=comment, user=user)
 168         like.save()
 169         likes = True
 170
 171     return {
 172         'commands': {
 173             'update_comment_score': [comment.id, likes and 1 or -1],
 174             'update_likes_comment_mark': [comment.id, likes and 'on' or 'off']
 175         }
 176     }
 177
 178 @command
 179 def delete_comment(request, id):
 180     comment = get_object_or_404(Comment, id=id)
 181     user = request.user
 182
 183     if not user.is_authenticated():
 184         raise AnonymousNotAllowedException(_('delete comments'))
 185
 186     if not user.can_delete_comment(comment):
 187         raise NotEnoughRepPointsException( _('delete comments'))
 188
 189     comment.mark_deleted(user)
 190
 191     return {
 192         'commands': {
 193             'remove_comment': [comment.id],
 194         }
 195     }
 196
 197 @command
 198 def mark_favorite(request, id):
 199     question = get_object_or_404(Question, id=id)
 200
 201     if not request.user.is_authenticated():
 202         raise AnonymousNotAllowedException(_('mark a question as favorite'))
 203
 204     try:
 205         favorite = FavoriteQuestion.objects.get(question=question, user=request.user)
 206         favorite.delete()
 207         added = False
 208     except ObjectDoesNotExist:
 209         favorite = FavoriteQuestion(question=question, user=request.user)
 210         favorite.save()
 211         added = True
 212
 213     return {
 214         'commands': {
 215             'update_favorite_count': [added and 1 or -1],
 216             'update_favorite_mark': [added and 'on' or 'off']
 217         }
 218     }
 219
 220 @command
 221 def comment(request, post_type, id):
 222     post = get_object_or_404(post_type == "question" and Question or Answer, id=id)
 223     user = request.user
 224
 225     if not user.is_authenticated():
 226         raise AnonymousNotAllowedException(_('comment'))
 227
 228     if not request.method == 'POST':
 229         raise Exception(_("Invalid request"))
 230
 231     if 'id' in request.POST:
 232         comment = get_object_or_404(Comment, id=request.POST['id'])
 233
 234         if not user.can_edit_comment(comment):
 235             raise NotEnoughRepPointsException( _('edit comments'))
 236     else:
 237         if not user.can_comment(post):
 238             raise NotEnoughRepPointsException( _('comment'))
 239
 240         comment = Comment(user=user, content_object=post)
 241
 242     comment_text = request.POST.get('comment', '').strip()
 243
 244     if not len(comment_text):
 245         raise Exception(_("Comment is empty"))
 246
 247     comment.comment=comment_text
 248     comment.save()
 249
 250     if comment._is_new:
 251         return {
 252             'commands': {
 253                 'insert_comment': [
 254                     post_type, id,
 255                     comment.id, comment_text, user.username, user.get_profile_url(), reverse('delete_comment', kwargs={'id': comment.id})
 256                 ]
 257             }
 258         }
 259     else:
 260         return {
 261             'commands': {
 262                 'update_comment': [comment.id, comment.comment]
 263             }
 264         }
 265
 266
 267 @command
 268 def accept_answer(request, id):
 269     user = request.user
 270
 271     if not user.is_authenticated():
 272         raise AnonymousNotAllowedException(_('accept answers'))
 273
 274     answer = get_object_or_404(Answer, id=id)
 275     question = answer.question
 276
 277     if not user.can_accept_answer(answer):
 278         raise Exception(_("Sorry but only the question author can accept an answer"))
 279
 280     commands = {}
 281
 282     if answer.accepted:
 283         answer.unmark_accepted()
 284         commands['unmark_accepted'] = [answer.id]
 285     else:
 286         try:
 287             accepted = question.answers.get(accepted=True)
 288             accepted.unmark_accepted()
 289             commands['unmark_accepted'] = [accepted.id]
 290         except:
 291             pass
 292
 293         answer.mark_accepted(user)
 294         commands['mark_accepted'] = [answer.id]
 295
 296     return {'commands': commands}
 297
 298 @command
 299 def delete_post(request, post_type, id):
 300     post = get_object_or_404(post_type == "question" and Question or Answer, id=id)
 301     user = request.user
 302
 303     if not user.is_authenticated():
 304         raise AnonymousNotAllowedException(_('delete posts'))
 305
 306     if not (user.can_delete_post(post)):
 307         raise NotEnoughRepPointsException(_('delete posts'))
 308
 309     post.mark_deleted(user)
 310
 311     return {
 312         'commands': {
 313                 'mark_deleted': [post_type, id]
 314             }
 315     }
 316
 317 @command
 318 def subscribe(request, id):
 319     question = get_object_or_404(Question, id=id)
 320
 321     try:
 322         subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 323         subscription.delete()
 324         subscribed = False
 325     except:
 326         subscription = QuestionSubscription(question=question, user=request.user, auto_subscription=False)
 327         subscription.save()
 328         subscribed = True
 329
 330     return {
 331         'commands': {
 332                 'set_subscription_button': [subscribed and _('unsubscribe me') or _('subscribe me')],
 333                 'set_subscription_status': ['']
 334             }
 335     }
 336
 337 #internally grouped views - used by the tagging system
 338 @ajax_login_required
 339 def mark_tag(request, tag=None, **kwargs):#tagging system
 340     action = kwargs['action']
 341     ts = MarkedTag.objects.filter(user=request.user, tag__name=tag)
 342     if action == 'remove':
 343         logging.debug('deleting tag %s' % tag)
 344         ts.delete()
 345     else:
 346         reason = kwargs['reason']
 347         if len(ts) == 0:
 348             try:
 349                 t = Tag.objects.get(name=tag)
 350                 mt = MarkedTag(user=request.user, reason=reason, tag=t)
 351                 mt.save()
 352             except:
 353                 pass
 354         else:
 355             ts.update(reason=reason)
 356     return HttpResponse(simplejson.dumps(''), mimetype="application/json")
 357
 358 @ajax_login_required
 359 def ajax_toggle_ignored_questions(request):#ajax tagging and tag-filtering system
 360     if request.user.hide_ignored_questions:
 361         new_hide_setting = False
 362     else:
 363         new_hide_setting = True
 364     request.user.hide_ignored_questions = new_hide_setting
 365     request.user.save()
 366
 367 @ajax_method
 368 def ajax_command(request):#refactor? view processing ajax commands - note "vote" and view others do it too
 369     if 'command' not in request.POST:
 370         return HttpResponseForbidden(mimetype="application/json")
 371     if request.POST['command'] == 'toggle-ignored-questions':
 372         return ajax_toggle_ignored_questions(request)
 373
 374 @login_required
 375 def close(request, id):#close question
 376     """view to initiate and process
 377     question close
 378     """
 379     question = get_object_or_404(Question, id=id)
 380     if not request.user.can_close_question(question):
 381         return HttpResponseForbidden()
 382     if request.method == 'POST':
 383         form = CloseForm(request.POST)
 384         if form.is_valid():
 385             reason = form.cleaned_data['reason']
 386             question.closed = True
 387             question.closed_by = request.user
 388             question.closed_at = datetime.datetime.now()
 389             question.close_reason = reason
 390             question.save()
 391         return HttpResponseRedirect(question.get_absolute_url())
 392     else:
 393         form = CloseForm()
 394         return render_to_response('close.html', {
 395             'form' : form,
 396             'question' : question,
 397             }, context_instance=RequestContext(request))
 398
 399 @login_required
 400 def reopen(request, id):#re-open question
 401     """view to initiate and process
 402     question close
 403     """
 404     question = get_object_or_404(Question, id=id)
 405     # open question
 406     if not request.user.can_reopen_question(question):
 407         return HttpResponseForbidden()
 408     if request.method == 'POST' :
 409         Question.objects.filter(id=question.id).update(closed=False,
 410             closed_by=None, closed_at=None, close_reason=None)
 411         return HttpResponseRedirect(question.get_absolute_url())
 412     else:
 413         return render_to_response('reopen.html', {
 414             'question' : question,
 415             }, context_instance=RequestContext(request))
 416
 417 #osqa-user communication system
 418 def read_message(request):#marks message a read
 419     if request.method == "POST":
 420         if request.POST['formdata'] == 'required':
 421             request.session['message_silent'] = 1
 422             if request.user.is_authenticated():
 423                 request.user.delete_messages()
 424     return HttpResponse('')
 425
 426