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