forum/views/readers.py

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