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.db.models import Q, Count
  14 from django.utils.translation import ugettext as _
  15 from django.template.defaultfilters import slugify
  16 from django.core.urlresolvers import reverse
  17 from django.utils.datastructures import SortedDict
  18 from django.views.decorators.cache import cache_page
  19 from django.utils.http import urlquote  as django_urlquote
  20 from django.template.defaultfilters import slugify
  21 from django.utils.safestring import mark_safe
  22
  23 from forum.utils.html import sanitize_html, hyperlink
  24 from forum.utils.diff import textDiff as htmldiff
  25 from forum.utils import pagination
  26 from forum.forms import *
  27 from forum.models import *
  28 from forum.forms import get_next_url
  29 from forum.actions import QuestionViewAction
  30 from forum.http_responses import HttpResponseUnauthorized
  31 from forum.feed import RssQuestionFeed, RssAnswerFeed
  32 from forum.utils.pagination import generate_uri
  33 import decorators
  34
  35 class HottestQuestionsSort(pagination.SortBase):
  36     def apply(self, questions):
  37         return questions.annotate(new_child_count=Count('all_children')).filter(
  38                 all_children__added_at__gt=datetime.datetime.now() - datetime.timedelta(days=1)).order_by('-new_child_count')
  39
  40
  41 class QuestionListPaginatorContext(pagination.PaginatorContext):
  42     def __init__(self, id='QUESTIONS_LIST', prefix='', default_pagesize=30):
  43         super (QuestionListPaginatorContext, self).__init__(id, sort_methods=(
  44             (_('active'), pagination.SimpleSort(_('active'), '-last_activity_at', _("Most <strong>recently updated</strong> questions"))),
  45             (_('newest'), pagination.SimpleSort(_('newest'), '-added_at', _("most <strong>recently asked</strong> questions"))),
  46             (_('hottest'), HottestQuestionsSort(_('hottest'), _("most <strong>active</strong> questions in the last 24 hours</strong>"))),
  47             (_('mostvoted'), pagination.SimpleSort(_('most voted'), '-score', _("most <strong>voted</strong> questions"))),
  48         ), pagesizes=(15, 30, 50), default_pagesize=default_pagesize, prefix=prefix)
  49
  50 class AnswerSort(pagination.SimpleSort):
  51     def apply(self, answers):
  52         if not settings.DISABLE_ACCEPTING_FEATURE:
  53             return answers.order_by(*(['-marked'] + list(self._get_order_by())))
  54         else:
  55             return super(AnswerSort, self).apply(answers)
  56
  57 class AnswerPaginatorContext(pagination.PaginatorContext):
  58     def __init__(self, id='ANSWER_LIST', prefix='', default_pagesize=10):
  59         super (AnswerPaginatorContext, self).__init__(id, sort_methods=(
  60             (_('oldest'), AnswerSort(_('oldest answers'), 'added_at', _("oldest answers will be shown first"))),
  61             (_('newest'), AnswerSort(_('newest answers'), '-added_at', _("newest answers will be shown first"))),
  62             (_('votes'), AnswerSort(_('popular answers'), ('-score', 'added_at'), _("most voted answers will be shown first"))),
  63         ), default_sort=_('votes'), pagesizes=(5, 10, 20), default_pagesize=default_pagesize, prefix=prefix)
  64
  65 class TagPaginatorContext(pagination.PaginatorContext):
  66     def __init__(self):
  67         super (TagPaginatorContext, self).__init__('TAG_LIST', sort_methods=(
  68             (_('name'), pagination.SimpleSort(_('by name'), 'name', _("sorted alphabetically"))),
  69             (_('used'), pagination.SimpleSort(_('by popularity'), '-used_count', _("sorted by frequency of tag use"))),
  70         ), default_sort=_('used'), pagesizes=(30, 60, 120))
  71
  72
  73 def feed(request):
  74     return RssQuestionFeed(
  75                 request,
  76                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  77                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  78                 settings.APP_DESCRIPTION)(request)
  79
  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     return question_list(request,
 106                          Question.objects.filter(tags__name=unquote(tag)),
 107                          mark_safe(_('questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
 108                          None,
 109                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
 110                          False)
 111
 112 @decorators.render('questions.html', 'questions', tabbed=False)
 113 def user_questions(request, mode, user, slug):
 114     user = get_object_or_404(User, id=user)
 115
 116     if mode == _('asked-by'):
 117         questions = Question.objects.filter(author=user)
 118         description = _("Questions asked by %s")
 119     elif mode == _('answered-by'):
 120         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 121         description = _("Questions answered by %s")
 122     elif mode == _('subscribed-by'):
 123         if not (request.user.is_superuser or request.user == user):
 124             return HttpResponseUnauthorized(request)
 125         questions = user.subscriptions
 126
 127         if request.user == user:
 128             description = _("Questions you subscribed %s")
 129         else:
 130             description = _("Questions subscribed by %s")
 131     else:
 132         raise Http404
 133
 134
 135     return question_list(request, questions,
 136                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 137                          page_title=description % user.username)
 138
 139 def question_list(request, initial,
 140                   list_description=_('questions'),
 141                   base_path=None,
 142                   page_title=_("All Questions"),
 143                   allowIgnoreTags=True,
 144                   feed_url=None,
 145                   paginator_context=None):
 146
 147     questions = initial.filter_state(deleted=False)
 148
 149     if request.user.is_authenticated() and allowIgnoreTags:
 150         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 151
 152     if page_title is None:
 153         page_title = _("Questions")
 154
 155     if request.GET.get('type', None) == 'rss':
 156         questions = questions.order_by('-added_at')
 157         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 158
 159     keywords =  ""
 160     if request.GET.get("q"):
 161         keywords = request.GET.get("q").strip()
 162
 163     #answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 164     #answer_description = _("answers")
 165
 166     if not feed_url:
 167         req_params = "&".join(generate_uri(request.GET, (_('page'), _('pagesize'), _('sort'))))
 168         if req_params:
 169             req_params = '&' + req_params
 170
 171         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 172
 173     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 174     "questions" : questions.distinct(),
 175     "questions_count" : questions.count(),
 176     "keywords" : keywords,
 177     "list_description": list_description,
 178     "base_path" : base_path,
 179     "page_title" : page_title,
 180     "tab" : "questions",
 181     'feed_url': feed_url,
 182     })
 183
 184
 185 def search(request):
 186     if request.method == "GET" and "q" in request.GET:
 187         keywords = request.GET.get("q")
 188         search_type = request.GET.get("t")
 189
 190         if not keywords:
 191             return HttpResponseRedirect(reverse(index))
 192         if search_type == 'tag':
 193             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 194         elif search_type == "user":
 195             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 196         elif search_type == "question":
 197             return question_search(request, keywords)
 198     else:
 199         return render_to_response("search.html", context_instance=RequestContext(request))
 200
 201 @decorators.render('questions.html')
 202 def question_search(request, keywords):
 203     can_rank, initial = Question.objects.search(keywords)
 204
 205     if can_rank:
 206         paginator_context = QuestionListPaginatorContext()
 207         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 208         paginator_context.force_sort = _('ranking')
 209     else:
 210         paginator_context = None
 211
 212     return question_list(request, initial,
 213                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 214                          None,
 215                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 216                          paginator_context=paginator_context)
 217
 218
 219 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 220 def tags(request):
 221     stag = ""
 222     tags = Tag.active.all()
 223
 224     if request.method == "GET":
 225         stag = request.GET.get("q", "").strip()
 226         if stag:
 227             tags = tags.filter(name__contains=stag)
 228
 229     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 230         "tags" : tags,
 231         "stag" : stag,
 232         "keywords" : stag
 233     })
 234
 235 def update_question_view_times(request, question):
 236     if not 'last_seen_in_question' in request.session:
 237         request.session['last_seen_in_question'] = {}
 238
 239     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 240
 241     if (not last_seen) or last_seen < question.last_activity_at:
 242         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 243         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 244
 245     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 246
 247 def match_question_slug(slug):
 248     slug_words = slug.split('-')
 249     qs = Question.objects.filter(title__istartswith=slug_words[0])
 250
 251     for q in qs:
 252         if slug == urlquote(slugify(q.title)):
 253             return q
 254
 255     return None
 256
 257 def answer_redirect(request, answer):
 258     pc = AnswerPaginatorContext()
 259
 260     sort = pc.sort(request)
 261
 262     if sort == _('oldest'):
 263         filter = Q(added_at__lt=answer.added_at)
 264     elif sort == _('newest'):
 265         filter = Q(added_at__gt=answer.added_at)
 266     elif sort == _('votes'):
 267         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 268     else:
 269         raise Http404()
 270
 271     count = answer.question.answers.filter(Q(marked=True) | filter).count()
 272     pagesize = pc.pagesize(request)
 273
 274     page = count / pagesize
 275
 276     if count % pagesize:
 277         page += 1
 278
 279     if page == 0:
 280         page = 1
 281
 282     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 283         answer.question.get_absolute_url(), _('page'), page, answer.id))
 284
 285 @decorators.render("question.html", 'questions')
 286 def question(request, id, slug='', answer=None):
 287     try:
 288         question = Question.objects.get(id=id)
 289     except:
 290         if slug:
 291             question = match_question_slug(slug)
 292             if question is not None:
 293                 return HttpResponseRedirect(question.get_absolute_url())
 294
 295         raise Http404()
 296
 297     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 298         raise Http404
 299
 300     if request.GET.get('type', None) == 'rss':
 301         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 302
 303     if answer:
 304         answer = get_object_or_404(Answer, id=answer)
 305
 306         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 307             raise Http404
 308
 309         if answer.marked:
 310             return HttpResponsePermanentRedirect(question.get_absolute_url())
 311
 312         return answer_redirect(request, answer)
 313
 314     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
 315         return HttpResponsePermanentRedirect(question.get_absolute_url())
 316
 317     if request.POST:
 318         answer_form = AnswerForm(question, request.POST)
 319     else:
 320         answer_form = AnswerForm(question)
 321
 322     answers = request.user.get_visible_answers(question)
 323
 324     update_question_view_times(request, question)
 325
 326     if request.user.is_authenticated():
 327         try:
 328             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 329         except:
 330             subscription = False
 331     else:
 332         subscription = False
 333
 334     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 335     "question" : question,
 336     "answer" : answer_form,
 337     "answers" : answers,
 338     "similar_questions" : question.get_related_questions(),
 339     "subscription": subscription,
 340     })
 341
 342
 343 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 344
 345 def revisions(request, id):
 346     post = get_object_or_404(Node, id=id).leaf
 347     revisions = list(post.revisions.order_by('revised_at'))
 348     rev_ctx = []
 349
 350     for i, revision in enumerate(revisions):
 351         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 352         'title': revision.title,
 353         'html': revision.html,
 354         'tags': revision.tagname_list(),
 355         }))))
 356
 357         if i > 0:
 358             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 359         else:
 360             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 361
 362         if not (revision.summary):
 363             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 364         else:
 365             rev_ctx[i]['summary'] = revision.summary
 366
 367     rev_ctx.reverse()
 368
 369     return render_to_response('revisions.html', {
 370     'post': post,
 371     'revisions': rev_ctx,
 372     }, context_instance=RequestContext(request))
 373
 374
 375