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,
  96                          Question.objects.all(),
  97                          _('questions'))
  98
  99 @decorators.render('questions.html')
 100 def tag(request, tag):
 101     try:
 102         tag = Tag.active.get(name=unquote(tag))
 103     except Tag.DoesNotExist:
 104         raise Http404
 105
 106     # Getting the questions QuerySet
 107     questions = Question.objects.filter(tags__id=tag.id)
 108
 109     if request.method == "GET":
 110         user = request.GET.get('user', None)
 111
 112         if user is not None:
 113             try:
 114                 questions = questions.filter(author=User.objects.get(username=user))
 115             except User.DoesNotExist:
 116                 raise Http404
 117
 118     # The extra tag context we need to pass
 119     tag_context = {
 120         'tag' : tag,
 121     }
 122
 123     # The context returned by the question_list function, contains info about the questions
 124     question_context = question_list(request,
 125                          questions,
 126                          mark_safe(_(u'questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
 127                          None,
 128                          mark_safe(_(u'Questions Tagged With %(tag)s') % {'tag': tag}),
 129                          False)
 130
 131     # If the return data type is not a dict just return it
 132     if not isinstance(question_context, dict):
 133         return question_context
 134
 135     question_context = dict(question_context)
 136
 137     # Create the combined context
 138     context = dict(question_context.items() + tag_context.items())
 139
 140     return context
 141
 142 @decorators.render('questions.html', 'questions', tabbed=False)
 143 def user_questions(request, mode, user, slug):
 144     user = get_object_or_404(User, id=user)
 145
 146     if mode == _('asked-by'):
 147         questions = Question.objects.filter(author=user)
 148         description = _("Questions asked by %s")
 149     elif mode == _('answered-by'):
 150         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 151         description = _("Questions answered by %s")
 152     elif mode == _('subscribed-by'):
 153         if not (request.user.is_superuser or request.user == user):
 154             return HttpResponseUnauthorized(request)
 155         questions = user.subscriptions
 156
 157         if request.user == user:
 158             description = _("Questions you subscribed %s")
 159         else:
 160             description = _("Questions subscribed by %s")
 161     else:
 162         raise Http404
 163
 164
 165     return question_list(request, questions,
 166                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 167                          page_title=description % user.username)
 168
 169 def question_list(request, initial,
 170                   list_description=_('questions'),
 171                   base_path=None,
 172                   page_title=_("All Questions"),
 173                   allowIgnoreTags=True,
 174                   feed_url=None,
 175                   paginator_context=None,
 176                   show_summary=None,
 177                   feed_sort=('-added_at',),
 178                   feed_req_params_exclude=(_('page'), _('pagesize'), _('sort')),
 179                   extra_context={}):
 180
 181     if show_summary is None:
 182         show_summary = bool(settings.SHOW_SUMMARY_ON_QUESTIONS_LIST)
 183
 184     questions = initial.filter_state(deleted=False)
 185
 186     if request.user.is_authenticated() and allowIgnoreTags:
 187         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 188
 189     if page_title is None:
 190         page_title = _("Questions")
 191
 192     if request.GET.get('type', None) == 'rss':
 193         if feed_sort:
 194             questions = questions.order_by(*feed_sort)
 195         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 196
 197     keywords =  ""
 198     if request.GET.get("q"):
 199         keywords = request.GET.get("q").strip()
 200
 201     #answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 202     #answer_description = _("answers")
 203
 204     if not feed_url:
 205         req_params = generate_uri(request.GET, feed_req_params_exclude)
 206
 207         if req_params:
 208             req_params = '&' + req_params
 209
 210         feed_url = request.path + "?type=rss" + req_params
 211
 212     context = {
 213         'questions' : questions.distinct(),
 214         'questions_count' : questions.count(),
 215         'keywords' : keywords,
 216         'list_description': list_description,
 217         'base_path' : base_path,
 218         'page_title' : page_title,
 219         'tab' : 'questions',
 220         'feed_url': feed_url,
 221         'show_summary' : show_summary,
 222     }
 223     context.update(extra_context)
 224
 225     return pagination.paginated(request,
 226                                ('questions', paginator_context or QuestionListPaginatorContext()), context)
 227
 228
 229 def search(request):
 230     if request.method == "GET" and "q" in request.GET:
 231         keywords = request.GET.get("q")
 232         search_type = request.GET.get("t")
 233
 234         if not keywords:
 235             return HttpResponseRedirect(reverse(index))
 236         if search_type == 'tag':
 237             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 238         elif search_type == "user":
 239             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 240         else:
 241             return question_search(request, keywords)
 242     else:
 243         return render_to_response("search.html", context_instance=RequestContext(request))
 244
 245 @decorators.render('questions.html')
 246 def question_search(request, keywords):
 247     rank_feed = False
 248     can_rank, initial = Question.objects.search(keywords)
 249
 250     if can_rank:
 251         sort_order = None
 252
 253         if isinstance(can_rank, basestring):
 254             sort_order = can_rank
 255             rank_feed = True
 256
 257         paginator_context = QuestionListPaginatorContext()
 258         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), sort_order, _("most relevant questions"))
 259         paginator_context.force_sort = _('ranking')
 260     else:
 261         paginator_context = None
 262
 263     feed_url = mark_safe(escape(request.path + "?type=rss&q=" + keywords))
 264
 265     return question_list(request, initial,
 266                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 267                          None,
 268                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 269                          paginator_context=paginator_context,
 270                          feed_url=feed_url, feed_sort=rank_feed and (can_rank,) or '-added_at')
 271
 272
 273 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 274 def tags(request):
 275     stag = ""
 276     tags = Tag.active.all()
 277
 278     if request.method == "GET":
 279         stag = request.GET.get("q", "").strip()
 280         if stag:
 281             tags = tags.filter(name__icontains=stag)
 282
 283     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 284         "tags" : tags,
 285         "stag" : stag,
 286         "keywords" : stag
 287     })
 288
 289 def update_question_view_times(request, question):
 290     last_seen_in_question = request.session.get('last_seen_in_question', {})
 291
 292     last_seen = last_seen_in_question.get(question.id, None)
 293
 294     if (not last_seen) or (last_seen < question.last_activity_at):
 295         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 296         last_seen_in_question[question.id] = datetime.datetime.now()
 297         request.session['last_seen_in_question'] = last_seen_in_question
 298
 299 def match_question_slug(id, slug):
 300     slug_words = slug.split('-')
 301     qs = Question.objects.filter(title__istartswith=slug_words[0])
 302
 303     for q in qs:
 304         if slug == urlquote(slugify(q.title)):
 305             return q
 306
 307     return None
 308
 309 def answer_redirect(request, answer):
 310     pc = AnswerPaginatorContext()
 311
 312     sort = pc.sort(request)
 313
 314     if sort == _('oldest'):
 315         filter = Q(added_at__lt=answer.added_at)
 316     elif sort == _('newest'):
 317         filter = Q(added_at__gt=answer.added_at)
 318     elif sort == _('votes'):
 319         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 320     else:
 321         raise Http404()
 322
 323     count = answer.question.answers.filter(Q(marked=True) | filter).exclude(state_string="(deleted)").count()
 324     pagesize = pc.pagesize(request)
 325
 326     page = count / pagesize
 327
 328     if count % pagesize:
 329         page += 1
 330
 331     if page == 0:
 332         page = 1
 333
 334     return HttpResponseRedirect("%s?%s=%s&focusedAnswerId=%s#%s" % (
 335         answer.question.get_absolute_url(), _('page'), page, answer.id, answer.id))
 336
 337 @decorators.render("question.html", 'questions')
 338 def question(request, id, slug='', answer=None):
 339     try:
 340         question = Question.objects.get(id=id)
 341     except:
 342         if slug:
 343             question = match_question_slug(id, slug)
 344             if question is not None:
 345                 return HttpResponseRedirect(question.get_absolute_url())
 346
 347         raise Http404()
 348
 349     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 350         raise Http404
 351
 352     if request.GET.get('type', None) == 'rss':
 353         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 354
 355     if answer:
 356         answer = get_object_or_404(Answer, id=answer)
 357
 358         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 359             raise Http404
 360
 361         if answer.marked:
 362             return HttpResponsePermanentRedirect(question.get_absolute_url())
 363
 364         return answer_redirect(request, answer)
 365
 366     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
 367         return HttpResponsePermanentRedirect(question.get_absolute_url())
 368
 369     if request.POST:
 370         answer_form = AnswerForm(request.POST, user=request.user)
 371     else:
 372         answer_form = AnswerForm(user=request.user)
 373
 374     answers = request.user.get_visible_answers(question)
 375
 376     update_question_view_times(request, question)
 377
 378     if request.user.is_authenticated():
 379         try:
 380             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 381         except:
 382             subscription = False
 383     else:
 384         subscription = False
 385     try:
 386         focused_answer_id = int(request.GET.get("focusedAnswerId", None))
 387     except TypeError, ValueError:
 388         focused_answer_id = None
 389
 390     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 391     "question" : question,
 392     "answer" : answer_form,
 393     "answers" : answers,
 394     "similar_questions" : question.get_related_questions(),
 395     "subscription": subscription,
 396     "embed_youtube_videos" : settings.EMBED_YOUTUBE_VIDEOS,
 397     "focused_answer_id" : focused_answer_id
 398     })
 399
 400
 401 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 402
 403 def revisions(request, id):
 404     post = get_object_or_404(Node, id=id).leaf
 405     revisions = list(post.revisions.order_by('revised_at'))
 406     rev_ctx = []
 407
 408     for i, revision in enumerate(revisions):
 409         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 410         'title': revision.title,
 411         'html': revision.html,
 412         'tags': revision.tagname_list(),
 413         }))))
 414
 415         if i > 0:
 416             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 417         else:
 418             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 419
 420         if not (revision.summary):
 421             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 422         else:
 423             rev_ctx[i]['summary'] = revision.summary
 424
 425     rev_ctx.reverse()
 426
 427     return render_to_response('revisions.html', {
 428     'post': post,
 429     'revisions': rev_ctx,
 430     }, context_instance=RequestContext(request))
 431
 432
 433