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
  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 import decorators
  33
  34 class QuestionListPaginatorContext(pagination.PaginatorContext):
  35     def __init__(self, id='QUESTIONS_LIST', prefix='', default_pagesize=30):
  36         super (QuestionListPaginatorContext, self).__init__(id, sort_methods=(
  37             (_('active'), pagination.SimpleSort(_('active'), '-last_activity_at', _("most recently updated questions"))),
  38             (_('newest'), pagination.SimpleSort(_('newest'), '-added_at', _("most recently asked questions"))),
  39             (_('hottest'), pagination.SimpleSort(_('hottest'), '-extra_count', _("hottest questions"))),
  40             (_('mostvoted'), pagination.SimpleSort(_('most voted'), '-score', _("most voted questions"))),
  41         ), pagesizes=(15, 30, 50), default_pagesize=default_pagesize, prefix=prefix)
  42
  43 class AnswerPaginatorContext(pagination.PaginatorContext):
  44     def __init__(self, id='ANSWER_LIST', prefix='', default_pagesize=10):
  45         super (AnswerPaginatorContext, self).__init__(id, sort_methods=(
  46             (_('oldest'), pagination.SimpleSort(_('oldest answers'), ('-marked', 'added_at'), _("oldest answers will be shown first"))),
  47             (_('newest'), pagination.SimpleSort(_('newest answers'), ('-marked', '-added_at'), _("newest answers will be shown first"))),
  48             (_('votes'), pagination.SimpleSort(_('popular answers'), ('-marked', '-score', 'added_at'), _("most voted answers will be shown first"))),
  49         ), default_sort=_('votes'), pagesizes=(5, 10, 20), default_pagesize=default_pagesize, prefix=prefix)
  50
  51 class TagPaginatorContext(pagination.PaginatorContext):
  52     def __init__(self):
  53         super (TagPaginatorContext, self).__init__('TAG_LIST', sort_methods=(
  54             (_('name'), pagination.SimpleSort(_('by name'), 'name', _("sorted alphabetically"))),
  55             (_('used'), pagination.SimpleSort(_('by popularity'), '-used_count', _("sorted by frequency of tag use"))),
  56         ), default_sort=_('used'), pagesizes=(30, 60, 120))
  57
  58
  59 def feed(request):
  60     return RssQuestionFeed(
  61                 request,
  62                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  63                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  64                 settings.APP_DESCRIPTION)(request)
  65
  66
  67 @decorators.render('index.html')
  68 def index(request):
  69     paginator_context = QuestionListPaginatorContext()
  70     paginator_context.base_path = reverse('questions')
  71     return question_list(request,
  72                          Question.objects.all(),
  73                          sort=request.utils.set_sort_method('active'),
  74                          base_path=reverse('questions'),
  75                          feed_url=reverse('latest_questions_feed'),
  76                          paginator_context=paginator_context)
  77
  78 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
  79 def unanswered(request):
  80     return question_list(request,
  81                          Question.objects.filter(extra_ref=None),
  82                          _('open questions without an accepted answer'),
  83                          request.utils.set_sort_method('active'),
  84                          None,
  85                          _("Unanswered Questions"))
  86
  87 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
  88 def questions(request):
  89     return question_list(request, Question.objects.all(), _('questions'), request.utils.set_sort_method('active'))
  90
  91 @decorators.render('questions.html')
  92 def tag(request, tag):
  93     return question_list(request,
  94                          Question.objects.filter(tags__name=unquote(tag)),
  95                          mark_safe(_('questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
  96                          request.utils.set_sort_method('active'),
  97                          None,
  98                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
  99                          False)
 100
 101 @decorators.render('questions.html', 'questions', tabbed=False)
 102 def user_questions(request, mode, user, slug):
 103     user = get_object_or_404(User, id=user)
 104
 105     if mode == _('asked-by'):
 106         questions = Question.objects.filter(author=user)
 107         description = _("Questions asked by %s")
 108     elif mode == _('answered-by'):
 109         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 110         description = _("Questions answered by %s")
 111     elif mode == _('subscribed-by'):
 112         if not (request.user.is_superuser or request.user == user):
 113             return HttpResponseUnauthorized(request)
 114         questions = user.subscriptions
 115
 116         if request.user == user:
 117             description = _("Questions you subscribed %s")
 118         else:
 119             description = _("Questions subscribed by %s")
 120     else:
 121         raise Http404
 122
 123
 124     return question_list(request, questions,
 125                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 126                          request.utils.set_sort_method('active'),
 127                          page_title=description % user.username)
 128
 129 def question_list(request, initial,
 130                   list_description=_('questions'),
 131                   sort=None,
 132                   base_path=None,
 133                   page_title=_("All Questions"),
 134                   allowIgnoreTags=True,
 135                   feed_url=None,
 136                   paginator_context=None):
 137
 138     questions = initial.filter_state(deleted=False)
 139
 140     if request.user.is_authenticated() and allowIgnoreTags:
 141         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 142
 143     if page_title is None:
 144         page_title = _("Questions")
 145
 146     if request.GET.get('type', None) == 'rss':
 147         questions = questions.order_by('-added_at')
 148         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 149
 150     keywords =  ""
 151     if request.GET.get("q"):
 152         keywords = request.GET.get("q").strip()
 153
 154     answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 155     answer_description = _("answers")
 156
 157     if not feed_url:
 158         req_params = "&".join(["%s=%s" % (k, v) for k, v in request.GET.items() if not k in (_('page'), _('pagesize'), _('sort'))])
 159         if req_params:
 160             req_params = '&' + req_params
 161
 162         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 163
 164     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 165     "questions" : questions,
 166     "questions_count" : questions.count(),
 167     "answer_count" : answer_count,
 168     "keywords" : keywords,
 169     "list_description": list_description,
 170     "answer_description": answer_description,
 171     "base_path" : base_path,
 172     "page_title" : page_title,
 173     "tab" : "questions",
 174     'feed_url': feed_url,
 175     })
 176
 177
 178 def search(request):
 179     if request.method == "GET" and "q" in request.GET:
 180         keywords = request.GET.get("q")
 181         search_type = request.GET.get("t")
 182
 183         if not keywords:
 184             return HttpResponseRedirect(reverse(index))
 185         if search_type == 'tag':
 186             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 187         elif search_type == "user":
 188             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 189         elif search_type == "question":
 190             return question_search(request, keywords)
 191     else:
 192         return render_to_response("search.html", context_instance=RequestContext(request))
 193
 194 @decorators.render('questions.html')
 195 def question_search(request, keywords):
 196     can_rank, initial = Question.objects.search(keywords)
 197
 198     if can_rank:
 199         paginator_context = QuestionListPaginatorContext()
 200         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 201         paginator_context.force_sort = _('ranking')
 202     else:
 203         paginator_context = None
 204
 205     return question_list(request, initial,
 206                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 207                          False,
 208                          "%s?t=question&q=%s" % (reverse('search'),django_urlquote(keywords)),
 209                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 210                          paginator_context=paginator_context)
 211
 212
 213 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 214 def tags(request):
 215     stag = ""
 216     tags = Tag.active.all()
 217
 218     if request.method == "GET":
 219         stag = request.GET.get("q", "").strip()
 220         if stag:
 221             tags = tags.filter(name__contains=stag)
 222
 223     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 224         "tags" : tags,
 225         "stag" : stag,
 226         "keywords" : stag
 227     })
 228
 229 def update_question_view_times(request, question):
 230     if not 'last_seen_in_question' in request.session:
 231         request.session['last_seen_in_question'] = {}
 232
 233     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 234
 235     if (not last_seen) or last_seen < question.last_activity_at:
 236         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 237         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 238
 239     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 240
 241 def match_question_slug(slug):
 242     slug_words = slug.split('-')
 243     qs = Question.objects.filter(title__istartswith=slug_words[0])
 244
 245     for q in qs:
 246         if slug == urlquote(slugify(q.title)):
 247             return q
 248
 249     return None
 250
 251 def answer_redirect(request, answer):
 252     pc = AnswerPaginatorContext()
 253
 254     sort = pc.sort(request)
 255
 256     if sort == _('oldest'):
 257         filter = Q(added_at__lt=answer.added_at)
 258     elif sort == _('newest'):
 259         filter = Q(added_at__gt=answer.added_at)
 260     elif sort == _('votes'):
 261         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 262     else:
 263         raise Http404()
 264
 265     count = answer.question.answers.filter(Q(marked=True) | filter).count()
 266     pagesize = pc.pagesize(request)
 267
 268     page = count / pagesize
 269
 270     if count % pagesize:
 271         page += 1
 272
 273     if page == 0:
 274         page = 1
 275
 276     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 277         answer.question.get_absolute_url(), _('page'), page, answer.id))
 278
 279 @decorators.render("question.html", 'questions')
 280 def question(request, id, slug=None, answer=None):
 281     try:
 282         question = Question.objects.get(id=id)
 283     except:
 284         if slug:
 285             question = match_question_slug(slug)
 286             if question is not None:
 287                 return HttpResponseRedirect(question.get_absolute_url())
 288
 289         raise Http404()
 290
 291     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 292         raise Http404
 293
 294     if request.GET.get('type', None) == 'rss':
 295         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 296
 297     if answer:
 298         answer = get_object_or_404(Answer, id=answer)
 299
 300         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 301             raise Http404
 302
 303         if answer.marked:
 304             return HttpResponsePermanentRedirect(question.get_absolute_url())
 305
 306         return answer_redirect(request, answer)
 307
 308     if settings.FORCE_SINGLE_URL and ((not slug) or (slug != slugify(question.title))):
 309         return HttpResponsePermanentRedirect(question.get_absolute_url())
 310
 311     if request.POST:
 312         answer_form = AnswerForm(question, request.POST)
 313     else:
 314         answer_form = AnswerForm(question)
 315
 316     answers = request.user.get_visible_answers(question)
 317
 318     update_question_view_times(request, question)
 319
 320     if request.user.is_authenticated():
 321         try:
 322             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 323         except:
 324             subscription = False
 325     else:
 326         subscription = False
 327
 328     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 329     "question" : question,
 330     "answer" : answer_form,
 331     "answers" : answers,
 332     "similar_questions" : question.get_related_questions(),
 333     "subscription": subscription,
 334     })
 335
 336
 337 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 338
 339 def revisions(request, id):
 340     post = get_object_or_404(Node, id=id).leaf
 341     revisions = list(post.revisions.order_by('revised_at'))
 342     rev_ctx = []
 343
 344     for i, revision in enumerate(revisions):
 345         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 346         'title': revision.title,
 347         'html': revision.html,
 348         'tags': revision.tagname_list(),
 349         }))))
 350
 351         if i > 0:
 352             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 353         else:
 354             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 355
 356         if not (revision.summary):
 357             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 358         else:
 359             rev_ctx[i]['summary'] = revision.summary
 360
 361     rev_ctx.reverse()
 362
 363     return render_to_response('revisions.html', {
 364     'post': post,
 365     'revisions': rev_ctx,
 366     }, context_instance=RequestContext(request))
 367
 368
 369