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