forum/views/commands.py

   1 import datetime
   2 from forum import settings
   3 from django.core.exceptions import ObjectDoesNotExist
   4 from django.utils import simplejson
   5 from django.http import HttpResponse, HttpResponseRedirect, HttpResponseForbidden, Http404
   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.models.node import NodeMetaClass
  11 from forum.actions import *
  12 from django.core.urlresolvers import reverse
  13 from django.contrib.auth.decorators import login_required
  14 from forum.utils.decorators import ajax_method, ajax_login_required
  15 from forum.modules.decorators import decoratable
  16 from decorators import command, CommandException
  17 from forum import settings
  18 import logging
  19
  20 class NotEnoughRepPointsException(CommandException):
  21     def __init__(self, action):
  22         super(NotEnoughRepPointsException, self).__init__(
  23             _("""Sorry, but you don't have enough reputation points to %(action)s.<br />Please check the <a href='%(faq_url)s'>faq</a>""") % {'action': action, 'faq_url': reverse('faq')}
  24         )
  25
  26 class CannotDoOnOwnException(CommandException):
  27     def __init__(self, action):
  28         super(CannotDoOnOwnException, self).__init__(
  29             _("""Sorry but you cannot %(action)s your own post.<br />Please check the <a href='%(faq_url)s'>faq</a>""") % {'action': action, 'faq_url': reverse('faq')}
  30         )
  31
  32 class AnonymousNotAllowedException(CommandException):
  33     def __init__(self, action):
  34         super(AnonymousNotAllowedException, self).__init__(
  35             _("""Sorry but anonymous users cannot %(action)s.<br />Please login or create an account <a href='%(signin_url)s'>here</a>.""") % {'action': action, 'signin_url': reverse('auth_signin')}
  36         )
  37
  38 class NotEnoughLeftException(CommandException):
  39     def __init__(self, action, limit):
  40         super(NotEnoughLeftException, self).__init__(
  41             _("""Sorry, but you don't have enough %(action)s left for today..<br />The limit is %(limit)s per day..<br />Please check the <a href='%(faq_url)s'>faq</a>""") % {'action': action, 'limit': limit, 'faq_url': reverse('faq')}
  42         )
  43
  44 class CannotDoubleActionException(CommandException):
  45     def __init__(self, action):
  46         super(CannotDoubleActionException, self).__init__(
  47             _("""Sorry, but you cannot %(action)s twice the same post.<br />Please check the <a href='%(faq_url)s'>faq</a>""") % {'action': action, 'faq_url': reverse('faq')}
  48         )
  49
  50
  51 @command
  52 def vote_post(request, id, vote_type):
  53     post = get_object_or_404(Node, id=id).leaf
  54     user = request.user
  55
  56     if not user.is_authenticated():
  57         raise AnonymousNotAllowedException(_('vote'))
  58
  59     if user == post.author:
  60         raise CannotDoOnOwnException(_('vote'))
  61
  62     if not (vote_type == 'up' and user.can_vote_up() or user.can_vote_down()):
  63         raise NotEnoughRepPointsException(vote_type == 'up' and _('upvote') or _('downvote'))
  64
  65     user_vote_count_today = user.get_vote_count_today()
  66
  67     if user_vote_count_today >= int(settings.MAX_VOTES_PER_DAY):
  68         raise NotEnoughLeftException(_('votes'), str(settings.MAX_VOTES_PER_DAY))
  69
  70     new_vote_cls = (vote_type == 'up') and VoteUpAction or VoteDownAction
  71     score_inc = 0
  72
  73     old_vote = VoteAction.get_action_for(node=post, user=user)
  74
  75     if old_vote:
  76         if old_vote.action_date < datetime.datetime.now() - datetime.timedelta(days=int(settings.DENY_UNVOTE_DAYS)):
  77             raise CommandException(
  78                     _("Sorry but you cannot cancel a vote after %(ndays)d %(tdays)s from the original vote") %
  79                     {'ndays': int(settings.DENY_UNVOTE_DAYS), 'tdays': ungettext('day', 'days', int(settings.DENY_UNVOTE_DAYS))}
  80             )
  81
  82         old_vote.cancel(ip=request.META['REMOTE_ADDR'])
  83         score_inc += (old_vote.__class__ == VoteDownAction) and 1 or -1
  84
  85     if old_vote.__class__ != new_vote_cls:
  86         new_vote_cls(user=user, node=post, ip=request.META['REMOTE_ADDR']).save()
  87         score_inc += (new_vote_cls == VoteUpAction) and 1 or -1
  88     else:
  89         vote_type = "none"
  90
  91     response = {
  92         'commands': {
  93             'update_post_score': [id, score_inc],
  94             'update_user_post_vote': [id, vote_type]
  95         }
  96     }
  97
  98     votes_left = (int(settings.MAX_VOTES_PER_DAY) - user_vote_count_today) + (vote_type == 'none' and -1 or 1)
  99
 100     if int(settings.START_WARN_VOTES_LEFT) >= votes_left:
 101         response['message'] = _("You have %(nvotes)s %(tvotes)s left today.") % \
 102                     {'nvotes': votes_left, 'tvotes': ungettext('vote', 'votes', votes_left)}
 103
 104     return response
 105
 106 @command
 107 def flag_post(request, id):
 108     if not request.POST:
 109         return render_to_response('node/report.html', {'types': settings.FLAG_TYPES})
 110
 111     post = get_object_or_404(Node, id=id)
 112     user = request.user
 113
 114     if not user.is_authenticated():
 115         raise AnonymousNotAllowedException(_('flag posts'))
 116
 117     if user == post.author:
 118         raise CannotDoOnOwnException(_('flag'))
 119
 120     if not (user.can_flag_offensive(post)):
 121         raise NotEnoughRepPointsException(_('flag posts'))
 122
 123     user_flag_count_today = user.get_flagged_items_count_today()
 124
 125     if user_flag_count_today >= int(settings.MAX_FLAGS_PER_DAY):
 126         raise NotEnoughLeftException(_('flags'), str(settings.MAX_FLAGS_PER_DAY))
 127
 128     try:
 129         current = FlagAction.objects.get(canceled=False, user=user, node=post)
 130         raise CommandException(_("You already flagged this post with the following reason: %(reason)s") % {'reason': current.extra})
 131     except ObjectDoesNotExist:
 132         reason = request.POST.get('prompt', '').strip()
 133
 134         if not len(reason):
 135             raise CommandException(_("Reason is empty"))
 136
 137         FlagAction(user=user, node=post, extra=reason, ip=request.META['REMOTE_ADDR']).save()
 138
 139     return {'message': _("Thank you for your report. A moderator will review your submission shortly.")}
 140
 141 @command
 142 def like_comment(request, id):
 143     comment = get_object_or_404(Comment, id=id)
 144     user = request.user
 145
 146     if not user.is_authenticated():
 147         raise AnonymousNotAllowedException(_('like comments'))
 148
 149     if user == comment.user:
 150         raise CannotDoOnOwnException(_('like'))
 151
 152     if not user.can_like_comment(comment):
 153         raise NotEnoughRepPointsException( _('like comments'))
 154
 155     like = VoteAction.get_action_for(node=comment, user=user)
 156
 157     if like:
 158         like.cancel(ip=request.META['REMOTE_ADDR'])
 159         likes = False
 160     else:
 161         VoteUpCommentAction(node=comment, user=user, ip=request.META['REMOTE_ADDR']).save()
 162         likes = True
 163
 164     return {
 165         'commands': {
 166             'update_post_score': [comment.id, likes and 1 or -1],
 167             'update_user_post_vote': [comment.id, likes and 'up' or 'none']
 168         }
 169     }
 170
 171 @command
 172 def delete_comment(request, id):
 173     comment = get_object_or_404(Comment, id=id)
 174     user = request.user
 175
 176     if not user.is_authenticated():
 177         raise AnonymousNotAllowedException(_('delete comments'))
 178
 179     if not user.can_delete_comment(comment):
 180         raise NotEnoughRepPointsException( _('delete comments'))
 181
 182     if not comment.nis.deleted:
 183         DeleteAction(node=comment, user=user, ip=request.META['REMOTE_ADDR']).save()
 184
 185     return {
 186         'commands': {
 187             'remove_comment': [comment.id],
 188         }
 189     }
 190
 191 @command
 192 def mark_favorite(request, id):
 193     question = get_object_or_404(Question, id=id)
 194
 195     if not request.user.is_authenticated():
 196         raise AnonymousNotAllowedException(_('mark a question as favorite'))
 197
 198     try:
 199         favorite = FavoriteAction.objects.get(canceled=False, node=question, user=request.user)
 200         favorite.cancel(ip=request.META['REMOTE_ADDR'])
 201         added = False
 202     except ObjectDoesNotExist:
 203         FavoriteAction(node=question, user=request.user, ip=request.META['REMOTE_ADDR']).save()
 204         added = True
 205
 206     return {
 207         'commands': {
 208             'update_favorite_count': [added and 1 or -1],
 209             'update_favorite_mark': [added and 'on' or 'off']
 210         }
 211     }
 212
 213 @decoratable
 214 @command
 215 def comment(request, id):
 216     post = get_object_or_404(Node, id=id)
 217     user = request.user
 218
 219     if not user.is_authenticated():
 220         raise AnonymousNotAllowedException(_('comment'))
 221
 222     if not request.method == 'POST':
 223         raise CommandException(_("Invalid request"))
 224
 225     comment_text = request.POST.get('comment', '').strip()
 226
 227     if not len(comment_text):
 228         raise CommandException(_("Comment is empty"))
 229
 230     if len(comment_text) < settings.FORM_MIN_COMMENT_BODY:
 231         raise CommandException(_("At least %d characters required on comment body.") % settings.FORM_MIN_COMMENT_BODY)
 232
 233     if len(comment_text) > settings.FORM_MAX_COMMENT_BODY:
 234         raise CommandException(_("No more than %d characters on comment body.") % settings.FORM_MAX_COMMENT_BODY)
 235
 236     if 'id' in request.POST:
 237         comment = get_object_or_404(Comment, id=request.POST['id'])
 238
 239         if not user.can_edit_comment(comment):
 240             raise NotEnoughRepPointsException( _('edit comments'))
 241
 242         comment = ReviseAction(user=user, node=comment, ip=request.META['REMOTE_ADDR']).save(data=dict(text=comment_text)).node
 243     else:
 244         if not user.can_comment(post):
 245             raise NotEnoughRepPointsException( _('comment'))
 246
 247         comment = CommentAction(user=user, ip=request.META['REMOTE_ADDR']).save(data=dict(text=comment_text, parent=post)).node
 248
 249     if comment.active_revision.revision == 1:
 250         return {
 251             'commands': {
 252                 'insert_comment': [
 253                     id, comment.id, comment.comment, user.username, user.get_profile_url(),
 254                         reverse('delete_comment', kwargs={'id': comment.id}), reverse('node_markdown', kwargs={'id': comment.id})
 255                 ]
 256             }
 257         }
 258     else:
 259         return {
 260             'commands': {
 261                 'update_comment': [comment.id, comment.comment]
 262             }
 263         }
 264
 265 @command
 266 def node_markdown(request, id):
 267     user = request.user
 268
 269     if not user.is_authenticated():
 270         raise AnonymousNotAllowedException(_('accept answers'))
 271
 272     node = get_object_or_404(Node, id=id)
 273     return HttpResponse(node.body, mimetype="text/plain")
 274
 275
 276 @command
 277 def accept_answer(request, id):
 278     user = request.user
 279
 280     if not user.is_authenticated():
 281         raise AnonymousNotAllowedException(_('accept answers'))
 282
 283     answer = get_object_or_404(Answer, id=id)
 284     question = answer.question
 285
 286     if not user.can_accept_answer(answer):
 287         raise CommandException(_("Sorry but only the question author can accept an answer"))
 288
 289     commands = {}
 290
 291     if answer.nis.accepted:
 292         answer.nstate.accepted.cancel(user, ip=request.META['REMOTE_ADDR'])
 293         commands['unmark_accepted'] = [answer.id]
 294     else:
 295         if question.answer_accepted:
 296             accepted = question.accepted_answer
 297             accepted.nstate.accepted.cancel(user, ip=request.META['REMOTE_ADDR'])
 298             commands['unmark_accepted'] = [accepted.id]
 299
 300         AcceptAnswerAction(node=answer, user=user, ip=request.META['REMOTE_ADDR']).save()
 301         commands['mark_accepted'] = [answer.id]
 302
 303     return {'commands': commands}
 304
 305 @command
 306 def delete_post(request, id):
 307     post = get_object_or_404(Node, id=id)
 308     user = request.user
 309
 310     if not user.is_authenticated():
 311         raise AnonymousNotAllowedException(_('delete posts'))
 312
 313     if not (user.can_delete_post(post)):
 314         raise NotEnoughRepPointsException(_('delete posts'))
 315
 316     ret = {'commands': {}}
 317
 318     if post.nis.deleted:
 319         post.nstate.deleted.cancel(user, ip=request.META['REMOTE_ADDR'])
 320         ret['commands']['unmark_deleted'] = [post.node_type, id]
 321     else:
 322         DeleteAction(node=post, user=user, ip=request.META['REMOTE_ADDR']).save()
 323
 324         ret['commands']['mark_deleted'] = [post.node_type, id]
 325
 326     return ret
 327
 328 @command
 329 def close(request, id, close):
 330     if close and not request.POST:
 331         return render_to_response('node/report.html', {'types': settings.CLOSE_TYPES})
 332
 333     question = get_object_or_404(Question, id=id)
 334     user = request.user
 335
 336     if not user.is_authenticated():
 337         raise AnonymousNotAllowedException(_('close questions'))
 338
 339     if question.nis.closed:
 340         if not user.can_reopen_question(question):
 341             raise NotEnoughRepPointsException(_('reopen questions'))
 342
 343         question.nstate.closed.cancel(user, ip=request.META['REMOTE_ADDR'])
 344     else:
 345         if not request.user.can_close_question(question):
 346             raise NotEnoughRepPointsException(_('close questions'))
 347
 348         reason = request.POST.get('prompt', '').strip()
 349
 350         if not len(reason):
 351             raise CommandException(_("Reason is empty"))
 352
 353         CloseAction(node=question, user=user, extra=reason, ip=request.META['REMOTE_ADDR']).save()
 354
 355     return {
 356         'commands': {
 357             'refresh_page': []
 358         }
 359     }
 360
 361 @command
 362 def wikify(request, id):
 363     node = get_object_or_404(Node, id=id)
 364     user = request.user
 365
 366     if not user.is_authenticated():
 367         raise AnonymousNotAllowedException(_('mark posts as community wiki'))
 368
 369     if node.nis.wiki:
 370         if not user.can_cancel_wiki(node):
 371             raise NotEnoughRepPointsException(_('cancel a community wiki post'))
 372
 373         if node.nstate.wiki.action_type == "wikify":
 374             node.nstate.wiki.cancel()
 375         else:
 376             node.nstate.wiki = None
 377     else:
 378         if not user.can_wikify(node):
 379             raise NotEnoughRepPointsException(_('mark posts as community wiki'))
 380
 381         WikifyAction(node=node, user=user, ip=request.META['REMOTE_ADDR']).save()
 382
 383     return {
 384         'commands': {
 385             'refresh_page': []
 386         }
 387     }
 388
 389 @command
 390 def convert_to_comment(request, id):
 391     user = request.user
 392     answer = get_object_or_404(Answer, id=id)
 393     question = answer.question
 394
 395     if not request.POST:
 396         description = lambda a: _("Answer by %(uname)s: %(snippet)s...") % {'uname': a.author.username, 'snippet': a.summary[:10]}
 397         nodes = [(question.id, _("Question"))]
 398         [nodes.append((a.id, description(a))) for a in question.answers.filter_state(deleted=False).exclude(id=answer.id)]
 399
 400         return render_to_response('node/convert_to_comment.html', {'answer': answer, 'nodes': nodes})
 401
 402     if not user.is_authenticated():
 403         raise AnonymousNotAllowedException(_("convert answers to comments"))
 404
 405     if not user.can_convert_to_comment(answer):
 406         raise NotEnoughRepPointsException(_("convert answers to comments"))
 407
 408     try:
 409         new_parent = Node.objects.get(id=request.POST.get('under', None))
 410     except:
 411         raise CommandException(_("That is an invalid post to put the comment under"))
 412
 413     if not (new_parent == question or (new_parent.node_type == 'answer' and new_parent.parent == question)):
 414         raise CommandException(_("That is an invalid post to put the comment under"))
 415
 416     AnswerToCommentAction(user=user, node=answer, ip=request.META['REMOTE_ADDR']).save(data=dict(new_parent=new_parent))
 417
 418     return {
 419         'commands': {
 420             'refresh_page': []
 421         }
 422     }
 423
 424 @command
 425 def subscribe(request, id):
 426     question = get_object_or_404(Question, id=id)
 427
 428     try:
 429         subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 430         subscription.delete()
 431         subscribed = False
 432     except:
 433         subscription = QuestionSubscription(question=question, user=request.user, auto_subscription=False)
 434         subscription.save()
 435         subscribed = True
 436
 437     return {
 438         'commands': {
 439                 'set_subscription_button': [subscribed and _('unsubscribe me') or _('subscribe me')],
 440                 'set_subscription_status': ['']
 441             }
 442     }
 443
 444 #internally grouped views - used by the tagging system
 445 @ajax_login_required
 446 def mark_tag(request, tag=None, **kwargs):#tagging system
 447     action = kwargs['action']
 448     ts = MarkedTag.objects.filter(user=request.user, tag__name=tag)
 449     if action == 'remove':
 450         logging.debug('deleting tag %s' % tag)
 451         ts.delete()
 452     else:
 453         reason = kwargs['reason']
 454         if len(ts) == 0:
 455             try:
 456                 t = Tag.objects.get(name=tag)
 457                 mt = MarkedTag(user=request.user, reason=reason, tag=t)
 458                 mt.save()
 459             except:
 460                 pass
 461         else:
 462             ts.update(reason=reason)
 463     return HttpResponse(simplejson.dumps(''), mimetype="application/json")
 464
 465 def matching_tags(request):
 466     if len(request.GET['q']) == 0:
 467        raise CommandException(_("Invalid request"))
 468
 469     possible_tags = Tag.active.filter(name__istartswith = request.GET['q'])
 470     tag_output = ''
 471     for tag in possible_tags:
 472         tag_output += (tag.name + "|" + tag.name + "." + tag.used_count.__str__() + "\n")
 473
 474     return HttpResponse(tag_output, mimetype="text/plain")
 475
 476 def related_questions(request):
 477     if request.POST and request.POST.get('title', None):
 478         return HttpResponse(simplejson.dumps(
 479                 [dict(title=q.title, url=q.get_absolute_url(), score=q.score, summary=q.summary)
 480                  for q in Question.objects.search(request.POST['title']).filter_state(deleted=False)[0:10]]), mimetype="application/json")
 481     else:
 482         raise Http404()
 483
 484
 485
 486
 487
 488
 489