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
  32 import decorators
  33
  34 # used in index page
  35 #refactor - move these numbers somewhere?
  36 INDEX_PAGE_SIZE = 30
  37 INDEX_AWARD_SIZE = 15
  38 INDEX_TAGS_SIZE = 25
  39 # used in tags list
  40 DEFAULT_PAGE_SIZE = 60
  41 # used in questions
  42 QUESTIONS_PAGE_SIZE = 30
  43 # used in answers
  44 ANSWERS_PAGE_SIZE = 10
  45
  46 class QuestionListPaginatorContext(pagination.PaginatorContext):
  47     def __init__(self):
  48         super (QuestionListPaginatorContext, self).__init__('QUESTIONS_LIST', sort_methods=(
  49             (_('active'), pagination.SimpleSort(_('active'), '-last_activity_at', _("most recently updated questions"))),
  50             (_('newest'), pagination.SimpleSort(_('newest'), '-added_at', _("most recently asked questions"))),
  51             (_('hottest'), pagination.SimpleSort(_('hottest'), '-extra_count', _("hottest questions"))),
  52             (_('mostvoted'), pagination.SimpleSort(_('most voted'), '-score', _("most voted questions"))),
  53         ), pagesizes=(15, 30, 50))
  54
  55 class AnswerSort(pagination.SimpleSort):
  56     def apply(self, objects):
  57         if self.label == _('votes'):
  58             return objects.order_by('-marked', self.order_by, 'added_at')
  59         else:
  60             return objects.order_by('-marked', self.order_by)
  61
  62 class AnswerPaginatorContext(pagination.PaginatorContext):
  63     def __init__(self):
  64         super (AnswerPaginatorContext, self).__init__('ANSWER_LIST', sort_methods=(
  65             (_('oldest'), AnswerSort(_('oldest answers'), 'added_at', _("oldest answers will be shown first"))),
  66             (_('newest'), AnswerSort(_('newest answers'), '-added_at', _("newest answers will be shown first"))),
  67             (_('votes'), AnswerSort(_('popular answers'), '-score', _("most voted answers will be shown first"))),
  68         ), default_sort=_('votes'), sticky_sort = True, pagesizes=(5, 10, 20))
  69
  70
  71 def feed(request):
  72     return RssQuestionFeed(
  73                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  74                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  75                 settings.APP_DESCRIPTION,
  76                 request)(request)
  77
  78
  79 @decorators.render('index.html')
  80 def index(request):
  81     return question_list(request,
  82                          Question.objects.all(),
  83                          sort=request.utils.set_sort_method('active'),
  84                          base_path=reverse('questions'),
  85                          feed_url=reverse('latest_questions_feed'))
  86
  87 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
  88 def unanswered(request):
  89     return question_list(request,
  90                          Question.objects.filter(extra_ref=None),
  91                          _('open questions without an accepted answer'),
  92                          request.utils.set_sort_method('active'),
  93                          None,
  94                          _("Unanswered Questions"))
  95
  96 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
  97 def questions(request):
  98     return question_list(request, Question.objects.all(), _('questions'), request.utils.set_sort_method('active'))
  99
 100 @decorators.render('questions.html')
 101 def tag(request, tag):
 102     return question_list(request,
 103                          Question.objects.filter(tags__name=unquote(tag)),
 104                          mark_safe(_('questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
 105                          request.utils.set_sort_method('active'),
 106                          None,
 107                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
 108                          False)
 109
 110 @decorators.render('questions.html', 'questions', tabbed=False)
 111 def user_questions(request, mode, user, slug):
 112     user = get_object_or_404(User, id=user)
 113
 114     if mode == _('asked-by'):
 115         questions = Question.objects.filter(author=user)
 116         description = _("Questions asked by %s")
 117     elif mode == _('answered-by'):
 118         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 119         description = _("Questions answered by %s")
 120     elif mode == _('subscribed-by'):
 121         if not (request.user.is_superuser or request.user == user):
 122             return HttpResponseUnauthorized(request)
 123         questions = user.subscriptions
 124
 125         if request.user == user:
 126             description = _("Questions you subscribed %s")
 127         else:
 128             description = _("Questions subscribed by %s")
 129     else:
 130         raise Http404
 131
 132
 133     return question_list(request, questions,
 134                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 135                          request.utils.set_sort_method('active'),
 136                          page_title=description % user.username)
 137
 138 def question_list(request, initial,
 139                   list_description=_('questions'),
 140                   sort=None,
 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         return RssQuestionFeed(questions, page_title, list_description, request)(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(["%s=%s" % (k, v) for k, v in request.GET.items() if not k in (_('page'), _('pagesize'), _('sort'))])
 167         if req_params:
 168             req_params = '&' + req_params
 169
 170         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 171
 172     return pagination.paginated(request, 'questions', paginator_context or QuestionListPaginatorContext(), {
 173     "questions" : questions,
 174     "questions_count" : questions.count(),
 175     "answer_count" : answer_count,
 176     "keywords" : keywords,
 177     "list_description": list_description,
 178     "answer_description": answer_description,
 179     "base_path" : base_path,
 180     "page_title" : page_title,
 181     "tab" : "questions",
 182     'feed_url': feed_url,
 183     })
 184
 185
 186 def search(request):
 187     if request.method == "GET" and "q" in request.GET:
 188         keywords = request.GET.get("q")
 189         search_type = request.GET.get("t")
 190
 191         if not keywords:
 192             return HttpResponseRedirect(reverse(index))
 193         if search_type == 'tag':
 194             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 195         elif search_type == "user":
 196             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 197         elif search_type == "question":
 198             return question_search(request, keywords)
 199     else:
 200         return render_to_response("search.html", context_instance=RequestContext(request))
 201
 202 @decorators.render('questions.html')
 203 def question_search(request, keywords):
 204     can_rank, initial = Question.objects.search(keywords)
 205
 206     if can_rank:
 207         paginator_context = QuestionListPaginatorContext()
 208         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 209         paginator_context.force_sort = _('ranking')
 210     else:
 211         paginator_context = None
 212
 213     return question_list(request, initial,
 214                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 215                          False,
 216                          "%s?t=question&q=%s" % (reverse('search'),django_urlquote(keywords)),
 217                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 218                          paginator_context=paginator_context)
 219
 220
 221 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 222 def tags(request):
 223     stag = ""
 224     is_paginated = True
 225     sortby = request.GET.get('sort', 'used')
 226     try:
 227         page = int(request.GET.get('page', '1'))
 228     except ValueError:
 229         page = 1
 230
 231     if request.method == "GET":
 232         stag = request.GET.get("q", "").strip()
 233         if stag != '':
 234             objects_list = Paginator(Tag.active.filter(name__contains=stag), DEFAULT_PAGE_SIZE)
 235         else:
 236             if sortby == "name":
 237                 objects_list = Paginator(Tag.active.order_by("name"), DEFAULT_PAGE_SIZE)
 238             else:
 239                 objects_list = Paginator(Tag.active.order_by("-used_count"), DEFAULT_PAGE_SIZE)
 240
 241     try:
 242         tags = objects_list.page(page)
 243     except (EmptyPage, InvalidPage):
 244         tags = objects_list.page(objects_list.num_pages)
 245
 246     return {
 247         "tags" : tags,
 248         "stag" : stag,
 249         "tab_id" : sortby,
 250         "keywords" : stag,
 251         "context" : {
 252             'is_paginated' : is_paginated,
 253             'pages': objects_list.num_pages,
 254             'page': page,
 255             'has_previous': tags.has_previous(),
 256             'has_next': tags.has_next(),
 257             'previous': tags.previous_page_number(),
 258             'next': tags.next_page_number(),
 259             'base_url' : reverse('tags') + '?sort=%s&' % sortby
 260         }
 261     }
 262
 263 def update_question_view_times(request, question):
 264     if not 'last_seen_in_question' in request.session:
 265         request.session['last_seen_in_question'] = {}
 266
 267     last_seen = request.session['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         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 272
 273     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 274
 275 def match_question_slug(slug):
 276     slug_words = slug.split('-')
 277     qs = Question.objects.filter(title__istartswith=slug_words[0])
 278
 279     for q in qs:
 280         if slug == urlquote(slugify(q.title)):
 281             return q
 282
 283     return None
 284
 285 def answer_redirect(request, answer):
 286     pc = AnswerPaginatorContext()
 287
 288     sort = pc.sort(request)
 289
 290     if sort == _('oldest'):
 291         filter = Q(added_at__lt=answer.added_at)
 292     elif sort == _('newest'):
 293         filter = Q(added_at__gt=answer.added_at)
 294     elif sort == _('votes'):
 295         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 296     else:
 297         raise Http404()
 298
 299     count = answer.question.answers.filter(Q(marked=True) | filter).count()
 300     pagesize = pc.pagesize(request)
 301
 302     page = count / pagesize
 303
 304     if count % pagesize:
 305         page += 1
 306
 307     if page == 0:
 308         page = 1
 309
 310     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 311         answer.question.get_absolute_url(), _('page'), page, answer.id))
 312
 313 @decorators.render("question.html", 'questions', tabbed=False)
 314 def question(request, id, slug, answer=None):
 315     try:
 316         question = Question.objects.get(id=id)
 317     except:
 318         if slug:
 319             question = match_question_slug(slug)
 320             if question is not None:
 321                 return HttpResponseRedirect(question.get_absolute_url())
 322
 323         raise Http404()
 324
 325     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 326         raise Http404
 327
 328     if answer:
 329         answer = get_object_or_404(Answer, id=answer)
 330
 331         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 332             raise Http404
 333
 334         if answer.marked:
 335             return HttpResponsePermanentRedirect(question.get_absolute_url())
 336
 337         return answer_redirect(request, answer)
 338
 339     if request.POST:
 340         answer_form = AnswerForm(question, request.POST)
 341     else:
 342         answer_form = AnswerForm(question)
 343
 344     answers = request.user.get_visible_answers(question)
 345
 346     update_question_view_times(request, question)
 347
 348     if request.user.is_authenticated():
 349         try:
 350             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 351         except:
 352             subscription = False
 353     else:
 354         subscription = False
 355
 356     return pagination.paginated(request, 'answers', AnswerPaginatorContext(), {
 357     "question" : question,
 358     "answer" : answer_form,
 359     "answers" : answers,
 360     "similar_questions" : question.get_related_questions(),
 361     "subscription": subscription,
 362     })
 363
 364
 365 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 366
 367 def revisions(request, id):
 368     post = get_object_or_404(Node, id=id).leaf
 369     revisions = list(post.revisions.order_by('revised_at'))
 370     rev_ctx = []
 371
 372     for i, revision in enumerate(revisions):
 373         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 374         'title': revision.title,
 375         'html': revision.html,
 376         'tags': revision.tagname_list(),
 377         }))))
 378
 379         if i > 0:
 380             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 381         else:
 382             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 383
 384         if not (revision.summary):
 385             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 386         else:
 387             rev_ctx[i]['summary'] = revision.summary
 388
 389     rev_ctx.reverse()
 390
 391     return render_to_response('revisions.html', {
 392     'post': post,
 393     'revisions': rev_ctx,
 394     }, context_instance=RequestContext(request))
 395
 396
 397