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 @decorators.render('index.html')
  81 def index(request):
  82     paginator_context = QuestionListPaginatorContext()
  83     paginator_context.base_path = reverse('questions')
  84     return question_list(request,
  85                          Question.objects.all(),
  86                          base_path=reverse('questions'),
  87                          feed_url=reverse('latest_questions_feed'),
  88                          paginator_context=paginator_context)
  89
  90 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
  91 def unanswered(request):
  92     return question_list(request,
  93                          Question.objects.exclude(id__in=Question.objects.filter(children__marked=True).distinct()),
  94                          _('open questions without an accepted answer'),
  95                          None,
  96                          _("Unanswered Questions"))
  97
  98 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
  99 def questions(request):
 100     return question_list(request, Question.objects.all(), _('questions'))
 101
 102 @decorators.render('questions.html')
 103 def tag(request, tag):
 104     return question_list(request,
 105                          Question.objects.filter(tags__name=unquote(tag)),
 106                          mark_safe(_('questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
 107                          None,
 108                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
 109                          False)
 110
 111 @decorators.render('questions.html', 'questions', tabbed=False)
 112 def user_questions(request, mode, user, slug):
 113     user = get_object_or_404(User, id=user)
 114
 115     if mode == _('asked-by'):
 116         questions = Question.objects.filter(author=user)
 117         description = _("Questions asked by %s")
 118     elif mode == _('answered-by'):
 119         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 120         description = _("Questions answered by %s")
 121     elif mode == _('subscribed-by'):
 122         if not (request.user.is_superuser or request.user == user):
 123             return HttpResponseUnauthorized(request)
 124         questions = user.subscriptions
 125
 126         if request.user == user:
 127             description = _("Questions you subscribed %s")
 128         else:
 129             description = _("Questions subscribed by %s")
 130     else:
 131         raise Http404
 132
 133
 134     return question_list(request, questions,
 135                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 136                          page_title=description % user.username)
 137
 138 def question_list(request, initial,
 139                   list_description=_('questions'),
 140                   base_path=None,
 141                   page_title=_("All Questions"),
 142                   allowIgnoreTags=True,
 143                   feed_url=None,
 144                   paginator_context=None):
 145
 146     questions = initial.filter_state(deleted=False)
 147
 148     if request.user.is_authenticated() and allowIgnoreTags:
 149         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 150
 151     if page_title is None:
 152         page_title = _("Questions")
 153
 154     if request.GET.get('type', None) == 'rss':
 155         questions = questions.order_by('-added_at')
 156         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 157
 158     keywords =  ""
 159     if request.GET.get("q"):
 160         keywords = request.GET.get("q").strip()
 161
 162     #answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 163     #answer_description = _("answers")
 164
 165     if not feed_url:
 166         req_params = "&".join(generate_uri(request.GET, (_('page'), _('pagesize'), _('sort'))))
 167         if req_params:
 168             req_params = '&' + req_params
 169
 170         feed_url = mark_safe(escape(request.path + "?type=rss" + req_params))
 171
 172     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 173     "questions" : questions.distinct(),
 174     "questions_count" : questions.count(),
 175     "keywords" : keywords,
 176     "list_description": list_description,
 177     "base_path" : base_path,
 178     "page_title" : page_title,
 179     "tab" : "questions",
 180     'feed_url': feed_url,
 181     })
 182
 183
 184 def search(request):
 185     if request.method == "GET" and "q" in request.GET:
 186         keywords = request.GET.get("q")
 187         search_type = request.GET.get("t")
 188
 189         if not keywords:
 190             return HttpResponseRedirect(reverse(index))
 191         if search_type == 'tag':
 192             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 193         elif search_type == "user":
 194             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 195         elif search_type == "question":
 196             return question_search(request, keywords)
 197     else:
 198         return render_to_response("search.html", context_instance=RequestContext(request))
 199
 200 @decorators.render('questions.html')
 201 def question_search(request, keywords):
 202     can_rank, initial = Question.objects.search(keywords)
 203
 204     if can_rank:
 205         paginator_context = QuestionListPaginatorContext()
 206         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 207         paginator_context.force_sort = _('ranking')
 208     else:
 209         paginator_context = None
 210
 211     return question_list(request, initial,
 212                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 213                          None,
 214                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 215                          paginator_context=paginator_context)
 216
 217
 218 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 219 def tags(request):
 220     stag = ""
 221     tags = Tag.active.all()
 222
 223     if request.method == "GET":
 224         stag = request.GET.get("q", "").strip()
 225         if stag:
 226             tags = tags.filter(name__icontains=stag)
 227
 228     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 229         "tags" : tags,
 230         "stag" : stag,
 231         "keywords" : stag
 232     })
 233
 234 def update_question_view_times(request, question):
 235     if not 'last_seen_in_question' in request.session:
 236         request.session['last_seen_in_question'] = {}
 237
 238     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 239
 240     if (not last_seen) or last_seen < question.last_activity_at:
 241         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 242         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 243
 244     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 245
 246 def match_question_slug(id, slug):
 247     slug_words = slug.split('-')
 248     qs = Question.objects.filter(title__istartswith=slug_words[0])
 249
 250     for q in qs:
 251         if slug == urlquote(slugify(q.title)):
 252             return q
 253
 254     return None
 255
 256 def answer_redirect(request, answer):
 257     pc = AnswerPaginatorContext()
 258
 259     sort = pc.sort(request)
 260
 261     if sort == _('oldest'):
 262         filter = Q(added_at__lt=answer.added_at)
 263     elif sort == _('newest'):
 264         filter = Q(added_at__gt=answer.added_at)
 265     elif sort == _('votes'):
 266         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 267     else:
 268         raise Http404()
 269
 270     count = answer.question.answers.filter(Q(marked=True) | filter).exclude(state_string="(deleted)").count()
 271     pagesize = pc.pagesize(request)
 272
 273     page = count / pagesize
 274
 275     if count % pagesize:
 276         page += 1
 277
 278     if page == 0:
 279         page = 1
 280
 281     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 282         answer.question.get_absolute_url(), _('page'), page, answer.id))
 283
 284 @decorators.render("question.html", 'questions')
 285 def question(request, id, slug='', answer=None):
 286     try:
 287         question = Question.objects.get(id=id)
 288     except:
 289         if slug:
 290             question = match_question_slug(id, slug)
 291             if question is not None:
 292                 return HttpResponseRedirect(question.get_absolute_url())
 293
 294         raise Http404()
 295
 296     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 297         raise Http404
 298
 299     if request.GET.get('type', None) == 'rss':
 300         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 301
 302     if answer:
 303         answer = get_object_or_404(Answer, id=answer)
 304
 305         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 306             raise Http404
 307
 308         if answer.marked:
 309             return HttpResponsePermanentRedirect(question.get_absolute_url())
 310
 311         return answer_redirect(request, answer)
 312
 313     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
 314         return HttpResponsePermanentRedirect(question.get_absolute_url())
 315
 316     if request.POST:
 317         answer_form = AnswerForm(question, request.POST)
 318     else:
 319         answer_form = AnswerForm(question)
 320
 321     answers = request.user.get_visible_answers(question)
 322
 323     update_question_view_times(request, question)
 324
 325     if request.user.is_authenticated():
 326         try:
 327             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 328         except:
 329             subscription = False
 330     else:
 331         subscription = False
 332
 333     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 334     "question" : question,
 335     "answer" : answer_form,
 336     "answers" : answers,
 337     "similar_questions" : question.get_related_questions(),
 338     "subscription": subscription,
 339     })
 340
 341
 342 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 343
 344 def revisions(request, id):
 345     post = get_object_or_404(Node, id=id).leaf
 346     revisions = list(post.revisions.order_by('revised_at'))
 347     rev_ctx = []
 348
 349     for i, revision in enumerate(revisions):
 350         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 351         'title': revision.title,
 352         'html': revision.html,
 353         'tags': revision.tagname_list(),
 354         }))))
 355
 356         if i > 0:
 357             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 358         else:
 359             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 360
 361         if not (revision.summary):
 362             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 363         else:
 364             rev_ctx[i]['summary'] = revision.summary
 365
 366     rev_ctx.reverse()
 367
 368     return render_to_response('revisions.html', {
 369     'post': post,
 370     'revisions': rev_ctx,
 371     }, context_instance=RequestContext(request))
 372
 373
 374