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()),
  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
 165     questions = initial.filter_state(deleted=False)
 166
 167     if request.user.is_authenticated() and allowIgnoreTags:
 168         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 169
 170     if page_title is None:
 171         page_title = _("Questions")
 172
 173     if request.GET.get('type', None) == 'rss':
 174         if feed_sort:
 175             questions = questions.order_by(*feed_sort)
 176         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 177
 178     keywords =  ""
 179     if request.GET.get("q"):
 180         keywords = request.GET.get("q").strip()
 181
 182     #answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 183     #answer_description = _("answers")
 184
 185     if not feed_url:
 186         req_params = generate_uri(request.GET, (_('page'), _('pagesize'), _('sort')))
 187         if req_params:
 188             req_params = '&' + req_params
 189
 190         feed_url = request.path + "?type=rss" + req_params
 191
 192     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 193     "questions" : questions.distinct(),
 194     "questions_count" : questions.count(),
 195     "keywords" : keywords,
 196     "list_description": list_description,
 197     "base_path" : base_path,
 198     "page_title" : page_title,
 199     "tab" : "questions",
 200     'feed_url': feed_url,
 201     })
 202
 203
 204 def search(request):
 205     if request.method == "GET" and "q" in request.GET:
 206         keywords = request.GET.get("q")
 207         search_type = request.GET.get("t")
 208
 209         if not keywords:
 210             return HttpResponseRedirect(reverse(index))
 211         if search_type == 'tag':
 212             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 213         elif search_type == "user":
 214             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 215         else:
 216             return question_search(request, keywords)
 217     else:
 218         return render_to_response("search.html", context_instance=RequestContext(request))
 219
 220 @decorators.render('questions.html')
 221 def question_search(request, keywords):
 222     rank_feed = False
 223     can_rank, initial = Question.objects.search(keywords)
 224
 225     if can_rank:
 226         sort_order = None
 227
 228         if isinstance(can_rank, basestring):
 229             sort_order = can_rank
 230             rank_feed = True
 231
 232         paginator_context = QuestionListPaginatorContext()
 233         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), sort_order, _("most relevant questions"))
 234         paginator_context.force_sort = _('ranking')
 235     else:
 236         paginator_context = None
 237
 238     feed_url = mark_safe(escape(request.path + "?type=rss&q=" + keywords))
 239
 240     return question_list(request, initial,
 241                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 242                          None,
 243                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 244                          paginator_context=paginator_context,
 245                          feed_url=feed_url, feed_sort=rank_feed and (can_rank,) or '-added_at')
 246
 247
 248 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 249 def tags(request):
 250     stag = ""
 251     tags = Tag.active.all()
 252
 253     if request.method == "GET":
 254         stag = request.GET.get("q", "").strip()
 255         if stag:
 256             tags = tags.filter(name__icontains=stag)
 257
 258     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 259         "tags" : tags,
 260         "stag" : stag,
 261         "keywords" : stag
 262     })
 263
 264 def update_question_view_times(request, question):
 265     last_seen_in_question = request.session.get('last_seen_in_question', {})
 266
 267     last_seen = last_seen_in_question.get(question.id, None)
 268
 269     if (not last_seen) or (last_seen < question.last_activity_at):
 270         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 271         last_seen_in_question[question.id] = datetime.datetime.now()
 272         request.session['last_seen_in_question'] = last_seen_in_question
 273
 274 def match_question_slug(id, slug):
 275     slug_words = slug.split('-')
 276     qs = Question.objects.filter(title__istartswith=slug_words[0])
 277
 278     for q in qs:
 279         if slug == urlquote(slugify(q.title)):
 280             return q
 281
 282     return None
 283
 284 def answer_redirect(request, answer):
 285     pc = AnswerPaginatorContext()
 286
 287     sort = pc.sort(request)
 288
 289     if sort == _('oldest'):
 290         filter = Q(added_at__lt=answer.added_at)
 291     elif sort == _('newest'):
 292         filter = Q(added_at__gt=answer.added_at)
 293     elif sort == _('votes'):
 294         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 295     else:
 296         raise Http404()
 297
 298     count = answer.question.answers.filter(Q(marked=True) | filter).exclude(state_string="(deleted)").count()
 299     pagesize = pc.pagesize(request)
 300
 301     page = count / pagesize
 302
 303     if count % pagesize:
 304         page += 1
 305
 306     if page == 0:
 307         page = 1
 308
 309     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 310         answer.question.get_absolute_url(), _('page'), page, answer.id))
 311
 312 @decorators.render("question.html", 'questions')
 313 def question(request, id, slug='', answer=None):
 314     try:
 315         question = Question.objects.get(id=id)
 316     except:
 317         if slug:
 318             question = match_question_slug(id, slug)
 319             if question is not None:
 320                 return HttpResponseRedirect(question.get_absolute_url())
 321
 322         raise Http404()
 323
 324     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 325         raise Http404
 326
 327     if request.GET.get('type', None) == 'rss':
 328         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 329
 330     if answer:
 331         answer = get_object_or_404(Answer, id=answer)
 332
 333         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 334             raise Http404
 335
 336         if answer.marked:
 337             return HttpResponsePermanentRedirect(question.get_absolute_url())
 338
 339         return answer_redirect(request, answer)
 340
 341     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
 342         return HttpResponsePermanentRedirect(question.get_absolute_url())
 343
 344     if request.POST:
 345         answer_form = AnswerForm(request.POST, user=request.user)
 346     else:
 347         answer_form = AnswerForm(user=request.user)
 348
 349     answers = request.user.get_visible_answers(question)
 350
 351     update_question_view_times(request, question)
 352
 353     if request.user.is_authenticated():
 354         try:
 355             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 356         except:
 357             subscription = False
 358     else:
 359         subscription = False
 360
 361     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 362     "question" : question,
 363     "answer" : answer_form,
 364     "answers" : answers,
 365     "similar_questions" : question.get_related_questions(),
 366     "subscription": subscription,
 367     })
 368
 369
 370 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 371
 372 def revisions(request, id):
 373     post = get_object_or_404(Node, id=id).leaf
 374     revisions = list(post.revisions.order_by('revised_at'))
 375     rev_ctx = []
 376
 377     for i, revision in enumerate(revisions):
 378         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 379         'title': revision.title,
 380         'html': revision.html,
 381         'tags': revision.tagname_list(),
 382         }))))
 383
 384         if i > 0:
 385             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 386         else:
 387             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 388
 389         if not (revision.summary):
 390             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 391         else:
 392             rev_ctx[i]['summary'] = revision.summary
 393
 394     rev_ctx.reverse()
 395
 396     return render_to_response('revisions.html', {
 397     'post': post,
 398     'revisions': rev_ctx,
 399     }, context_instance=RequestContext(request))
 400
 401
 402