forum/views/readers.py

   1 # encoding:utf-8
   2 import datetime
   3 import logging
   4 from urllib import unquote
   5 from django.shortcuts import render_to_response, get_object_or_404
   6 from django.http import HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
   7 from django.core.paginator import Paginator, EmptyPage, InvalidPage
   8 from django.template import RequestContext
   9 from django import template
  10 from django.utils.html import *
  11 from django.utils.http import urlquote
  12 from django.db.models import Q, Count
  13 from django.utils.translation import ugettext as _
  14 from django.core.urlresolvers import reverse
  15 from django.template.defaultfilters import slugify
  16 from django.utils.safestring import mark_safe
  17
  18 from forum import settings as django_settings
  19 from forum.utils.html import hyperlink
  20 from forum.utils.diff import textDiff as htmldiff
  21 from forum.utils import pagination
  22 from forum.forms import *
  23 from forum.models import *
  24 from forum.actions import QuestionViewAction
  25 from forum.http_responses import HttpResponseUnauthorized
  26 from forum.feed import RssQuestionFeed, RssAnswerFeed
  27 from forum.utils.pagination import generate_uri
  28
  29 import decorators
  30
  31 class HottestQuestionsSort(pagination.SortBase):
  32     def apply(self, questions):
  33         return questions.extra(select={'new_child_count': '''
  34             SELECT COUNT(1)
  35                 FROM forum_node fn1
  36                 WHERE fn1.abs_parent_id = forum_node.id
  37                     AND fn1.id != forum_node.id
  38                     AND NOT(fn1.state_string LIKE '%%(deleted)%%')
  39                     AND added_at > %s'''
  40             },
  41             select_params=[ (datetime.datetime.now() - datetime.timedelta(days=2))
  42                 .strftime('%Y-%m-%d')]
  43         ).order_by('-new_child_count', 'last_activity_at')
  44
  45 class UnansweredQuestionsSort(pagination.SortBase):
  46     def apply(self, questions):
  47         return questions.extra(select={'answer_count': '''
  48             SELECT COUNT(1)
  49                 FROM forum_node fn1
  50                 WHERE fn1.abs_parent_id = forum_node.id
  51                     AND fn1.id != forum_node.id
  52                     AND fn1.node_type='answer'
  53                     AND NOT(fn1.state_string LIKE '%%(deleted)%%')'''
  54             }).order_by('answer_count', 'last_activity_at')
  55
  56 class QuestionListPaginatorContext(pagination.PaginatorContext):
  57     def __init__(self, id='QUESTIONS_LIST', prefix='', pagesizes=(15, 30, 50), default_pagesize=30):
  58         super (QuestionListPaginatorContext, self).__init__(id, sort_methods=(
  59             (_('active'), pagination.SimpleSort(_('active'), '-last_activity_at', _("Most <strong>recently updated</strong> questions"))),
  60             (_('newest'), pagination.SimpleSort(_('newest'), '-added_at', _("most <strong>recently asked</strong> questions"))),
  61             (_('hottest'), HottestQuestionsSort(_('hottest'), _("most <strong>active</strong> questions in the last 24 hours</strong>"))),
  62             (_('mostvoted'), pagination.SimpleSort(_('most voted'), '-score', _("most <strong>voted</strong> questions"))),
  63             (_('unanswered'), UnansweredQuestionsSort('unanswered', "questions with no answers")),
  64         ), pagesizes=pagesizes, default_pagesize=default_pagesize, prefix=prefix)
  65
  66 class AnswerSort(pagination.SimpleSort):
  67     def apply(self, answers):
  68         if not settings.DISABLE_ACCEPTING_FEATURE:
  69             return answers.order_by(*(['-marked'] + list(self._get_order_by())))
  70         else:
  71             return super(AnswerSort, self).apply(answers)
  72
  73 class AnswerPaginatorContext(pagination.PaginatorContext):
  74     def __init__(self, id='ANSWER_LIST', prefix='', default_pagesize=10):
  75         super (AnswerPaginatorContext, self).__init__(id, sort_methods=(
  76             (_('active'), AnswerSort(_('active answers'), '-last_activity_at', _("most recently updated answers/comments will be shown first"))),
  77             (_('oldest'), AnswerSort(_('oldest answers'), 'added_at', _("oldest answers will be shown first"))),
  78             (_('newest'), AnswerSort(_('newest answers'), '-added_at', _("newest answers will be shown first"))),
  79             (_('votes'), AnswerSort(_('popular answers'), ('-score', 'added_at'), _("most voted answers will be shown first"))),
  80         ), default_sort=_('votes'), pagesizes=(5, 10, 20), default_pagesize=default_pagesize, prefix=prefix)
  81
  82 class TagPaginatorContext(pagination.PaginatorContext):
  83     def __init__(self):
  84         super (TagPaginatorContext, self).__init__('TAG_LIST', sort_methods=(
  85             (_('name'), pagination.SimpleSort(_('by name'), 'name', _("sorted alphabetically"))),
  86             (_('used'), pagination.SimpleSort(_('by popularity'), '-used_count', _("sorted by frequency of tag use"))),
  87         ), default_sort=_('used'), pagesizes=(30, 60, 120))
  88
  89
  90 def feed(request):
  91     return RssQuestionFeed(
  92                 request,
  93                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  94                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  95                 settings.APP_DESCRIPTION)(request)
  96
  97 @decorators.render('index.html')
  98 def index(request):
  99     paginator_context = QuestionListPaginatorContext()
 100     paginator_context.base_path = reverse('questions')
 101     return question_list(request,
 102                          Question.objects.all(),
 103                          base_path=reverse('questions'),
 104                          feed_url=reverse('latest_questions_feed'),
 105                          paginator_context=paginator_context)
 106
 107 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
 108 def unanswered(request):
 109     return question_list(request,
 110                          Question.objects.exclude(id__in=Question.objects.filter(children__marked=True).distinct()).exclude(marked=True),
 111                          _('open questions without an accepted answer'),
 112                          None,
 113                          _("Unanswered Questions"))
 114
 115 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
 116 def questions(request):
 117     return question_list(request,
 118                          Question.objects.all(),
 119                          _('questions'))
 120
 121 @decorators.render('questions.html')
 122 def tag(request, tag):
 123     try:
 124         tag = Tag.active.get(name=unquote(tag))
 125     except Tag.DoesNotExist:
 126         raise Http404
 127
 128     # Getting the questions QuerySet
 129     questions = Question.objects.filter(tags__id=tag.id)
 130
 131     if request.method == "GET":
 132         user = request.GET.get('user', None)
 133
 134         if user is not None:
 135             try:
 136                 questions = questions.filter(author=User.objects.get(username=user))
 137             except User.DoesNotExist:
 138                 raise Http404
 139
 140     # The extra tag context we need to pass
 141     tag_context = {
 142         'tag' : tag,
 143     }
 144
 145     # The context returned by the question_list function, contains info about the questions
 146     question_context = question_list(request,
 147                          questions,
 148                          mark_safe(_(u'questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
 149                          None,
 150                          mark_safe(_(u'Questions Tagged With %(tag)s') % {'tag': tag}),
 151                          False)
 152
 153     # If the return data type is not a dict just return it
 154     if not isinstance(question_context, dict):
 155         return question_context
 156
 157     question_context = dict(question_context)
 158
 159     # Create the combined context
 160     context = dict(question_context.items() + tag_context.items())
 161
 162     return context
 163
 164 @decorators.render('questions.html', 'questions', tabbed=False)
 165 def user_questions(request, mode, user, slug):
 166     user = get_object_or_404(User, id=user)
 167
 168     if mode == _('asked-by'):
 169         questions = Question.objects.filter(author=user)
 170         description = _("Questions asked by %s")
 171     elif mode == _('answered-by'):
 172         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 173         description = _("Questions answered by %s")
 174     elif mode == _('subscribed-by'):
 175         if not (request.user.is_superuser or request.user == user):
 176             return HttpResponseUnauthorized(request)
 177         questions = user.subscriptions
 178
 179         if request.user == user:
 180             description = _("Questions you subscribed %s")
 181         else:
 182             description = _("Questions subscribed by %s")
 183     else:
 184         raise Http404
 185
 186
 187     return question_list(request, questions,
 188                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 189                          page_title=description % user.username)
 190
 191 def question_list(request, initial,
 192                   list_description=_('questions'),
 193                   base_path=None,
 194                   page_title=_("All Questions"),
 195                   allowIgnoreTags=True,
 196                   feed_url=None,
 197                   paginator_context=None,
 198                   show_summary=None,
 199                   feed_sort=('-added_at',),
 200                   feed_req_params_exclude=(_('page'), _('pagesize'), _('sort')),
 201                   extra_context={}):
 202
 203     if show_summary is None:
 204         show_summary = bool(settings.SHOW_SUMMARY_ON_QUESTIONS_LIST)
 205
 206     questions = initial.filter_state(deleted=False)
 207
 208     if request.user.is_authenticated() and allowIgnoreTags:
 209         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 210
 211     if page_title is None:
 212         page_title = _("Questions")
 213
 214     if request.GET.get('type', None) == 'rss':
 215         if feed_sort:
 216             questions = questions.order_by(*feed_sort)
 217         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 218
 219     keywords =  ""
 220     if request.GET.get("q"):
 221         keywords = request.GET.get("q").strip()
 222
 223     #answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 224     #answer_description = _("answers")
 225
 226     if not feed_url:
 227         req_params = generate_uri(request.GET, feed_req_params_exclude)
 228
 229         if req_params:
 230             req_params = '&' + req_params
 231
 232         feed_url = request.path + "?type=rss" + req_params
 233
 234     context = {
 235         'questions' : questions.distinct(),
 236         'questions_count' : questions.count(),
 237         'keywords' : keywords,
 238         'list_description': list_description,
 239         'base_path' : base_path,
 240         'page_title' : page_title,
 241         'tab' : 'questions',
 242         'feed_url': feed_url,
 243         'show_summary' : show_summary,
 244     }
 245     context.update(extra_context)
 246
 247     return pagination.paginated(request,
 248                                ('questions', paginator_context or QuestionListPaginatorContext()), context)
 249
 250
 251 def search(request):
 252     if request.method == "GET" and "q" in request.GET:
 253         keywords = request.GET.get("q")
 254         search_type = request.GET.get("t")
 255
 256         if not keywords:
 257             return HttpResponseRedirect(reverse(index))
 258         if search_type == 'tag':
 259             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 260         elif search_type == "user":
 261             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 262         else:
 263             return question_search(request, keywords)
 264     else:
 265         return render_to_response("search.html", context_instance=RequestContext(request))
 266
 267 @decorators.render('questions.html')
 268 def question_search(request, keywords):
 269     rank_feed = False
 270     can_rank, initial = Question.objects.search(keywords)
 271
 272     if can_rank:
 273         sort_order = None
 274
 275         if isinstance(can_rank, basestring):
 276             sort_order = can_rank
 277             rank_feed = True
 278
 279         paginator_context = QuestionListPaginatorContext()
 280         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), sort_order, _("most relevant questions"))
 281         paginator_context.force_sort = _('ranking')
 282     else:
 283         paginator_context = None
 284
 285     feed_url = mark_safe(escape(request.path + "?type=rss&q=" + keywords))
 286
 287     return question_list(request, initial,
 288                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 289                          None,
 290                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 291                          paginator_context=paginator_context,
 292                          feed_url=feed_url, feed_sort=rank_feed and (can_rank,) or '-added_at')
 293
 294
 295 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 296 def tags(request):
 297     stag = ""
 298     tags = Tag.active.all()
 299
 300     if request.method == "GET":
 301         stag = request.GET.get("q", "").strip()
 302         if stag:
 303             tags = tags.filter(name__icontains=stag)
 304
 305     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 306         "tags" : tags,
 307         "stag" : stag,
 308         "keywords" : stag
 309     })
 310
 311 def update_question_view_times(request, question):
 312     last_seen_in_question = request.session.get('last_seen_in_question', {})
 313
 314     last_seen = last_seen_in_question.get(question.id, None)
 315
 316     if (not last_seen) or (last_seen < question.last_activity_at):
 317         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 318         last_seen_in_question[question.id] = datetime.datetime.now()
 319         request.session['last_seen_in_question'] = last_seen_in_question
 320
 321 def match_question_slug(id, slug):
 322     slug_words = slug.split('-')
 323     qs = Question.objects.filter(title__istartswith=slug_words[0])
 324
 325     for q in qs:
 326         if slug == urlquote(slugify(q.title)):
 327             return q
 328
 329     return None
 330
 331 def answer_redirect(request, answer):
 332     pc = AnswerPaginatorContext()
 333
 334     sort = pc.sort(request)
 335
 336     if sort == _('oldest'):
 337         filter = Q(added_at__lt=answer.added_at)
 338     elif sort == _('newest'):
 339         filter = Q(added_at__gt=answer.added_at)
 340     elif sort == _('votes'):
 341         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 342     else:
 343         raise Http404()
 344
 345     count = answer.question.answers.filter(Q(marked=True) | filter).exclude(state_string="(deleted)").count()
 346     pagesize = pc.pagesize(request)
 347
 348     page = count / pagesize
 349
 350     if count % pagesize:
 351         page += 1
 352
 353     if page == 0:
 354         page = 1
 355
 356     return HttpResponseRedirect("%s?%s=%s&focusedAnswerId=%s#%s" % (
 357         answer.question.get_absolute_url(), _('page'), page, answer.id, answer.id))
 358
 359 @decorators.render("question.html", 'questions')
 360 def question(request, id, slug='', answer=None):
 361     try:
 362         question = Question.objects.get(id=id)
 363     except:
 364         if slug:
 365             question = match_question_slug(id, slug)
 366             if question is not None:
 367                 return HttpResponseRedirect(question.get_absolute_url())
 368
 369         raise Http404()
 370
 371     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 372         raise Http404
 373
 374     if request.GET.get('type', None) == 'rss':
 375         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 376
 377     if answer:
 378         answer = get_object_or_404(Answer, id=answer)
 379
 380         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 381             raise Http404
 382
 383         if answer.marked:
 384             return HttpResponsePermanentRedirect(question.get_absolute_url())
 385
 386         return answer_redirect(request, answer)
 387
 388     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
 389         return HttpResponsePermanentRedirect(question.get_absolute_url())
 390
 391     if request.POST:
 392         answer_form = AnswerForm(request.POST, user=request.user)
 393     else:
 394         answer_form = AnswerForm(user=request.user)
 395
 396     answers = request.user.get_visible_answers(question)
 397
 398     update_question_view_times(request, question)
 399
 400     if request.user.is_authenticated():
 401         try:
 402             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 403         except:
 404             subscription = False
 405     else:
 406         subscription = False
 407     try:
 408         focused_answer_id = int(request.GET.get("focusedAnswerId", None))
 409     except TypeError, ValueError:
 410         focused_answer_id = None
 411
 412     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 413     "question" : question,
 414     "answer" : answer_form,
 415     "answers" : answers,
 416     "similar_questions" : question.get_related_questions(),
 417     "subscription": subscription,
 418     "embed_youtube_videos" : settings.EMBED_YOUTUBE_VIDEOS,
 419     "focused_answer_id" : focused_answer_id
 420     })
 421
 422
 423 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 424
 425 def revisions(request, id):
 426     post = get_object_or_404(Node, id=id).leaf
 427     revisions = list(post.revisions.order_by('revised_at'))
 428     rev_ctx = []
 429
 430     for i, revision in enumerate(revisions):
 431         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 432         'title': revision.title,
 433         'html': revision.html,
 434         'tags': revision.tagname_list(),
 435         }))))
 436
 437         if i > 0:
 438             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 439         else:
 440             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 441
 442         if not (revision.summary):
 443             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 444         else:
 445             rev_ctx[i]['summary'] = revision.summary
 446
 447     rev_ctx.reverse()
 448
 449     return render_to_response('revisions.html', {
 450     'post': post,
 451     'revisions': rev_ctx,
 452     }, context_instance=RequestContext(request))
 453
 454
 455