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