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 AnswerSort(pagination.SimpleSort):
  44     def apply(self, objects):
  45         if self.label == _('votes'):
  46             return objects.order_by('-marked', self.order_by, 'added_at')
  47         else:
  48             return objects.order_by('-marked', self.order_by)
  49
  50 class AnswerPaginatorContext(pagination.PaginatorContext):
  51     def __init__(self, id='ANSWER_LIST', prefix='', default_pagesize=10):
  52         super (AnswerPaginatorContext, self).__init__(id, sort_methods=(
  53             (_('oldest'), AnswerSort(_('oldest answers'), 'added_at', _("oldest answers will be shown first"))),
  54             (_('newest'), AnswerSort(_('newest answers'), '-added_at', _("newest answers will be shown first"))),
  55             (_('votes'), AnswerSort(_('popular answers'), '-score', _("most voted answers will be shown first"))),
  56         ), default_sort=_('votes'), sticky_sort = True, pagesizes=(5, 10, 20), default_pagesize=default_pagesize, prefix=prefix)
  57
  58 class TagPaginatorContext(pagination.PaginatorContext):
  59     def __init__(self):
  60         super (TagPaginatorContext, self).__init__('TAG_LIST', sort_methods=(
  61             (_('name'), pagination.SimpleSort(_('by name'), 'name', _("sorted alphabetically"))),
  62             (_('used'), pagination.SimpleSort(_('by popularity'), '-used_count', _("sorted by frequency of tag use"))),
  63         ), default_sort=_('used'), pagesizes=(30, 60, 120))
  64
  65
  66 def feed(request):
  67     return RssQuestionFeed(
  68                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  69                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  70                 settings.APP_DESCRIPTION,
  71                 request)(request)
  72
  73
  74 @decorators.render('index.html')
  75 def index(request):
  76     return question_list(request,
  77                          Question.objects.all(),
  78                          sort=request.utils.set_sort_method('active'),
  79                          base_path=reverse('questions'),
  80                          feed_url=reverse('latest_questions_feed'))
  81
  82 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
  83 def unanswered(request):
  84     return question_list(request,
  85                          Question.objects.filter(extra_ref=None),
  86                          _('open questions without an accepted answer'),
  87                          request.utils.set_sort_method('active'),
  88                          None,
  89                          _("Unanswered Questions"))
  90
  91 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
  92 def questions(request):
  93     return question_list(request, Question.objects.all(), _('questions'), request.utils.set_sort_method('active'))
  94
  95 @decorators.render('questions.html')
  96 def tag(request, tag):
  97     return question_list(request,
  98                          Question.objects.filter(tags__name=unquote(tag)),
  99                          mark_safe(_('questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
 100                          request.utils.set_sort_method('active'),
 101                          None,
 102                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
 103                          False)
 104
 105 @decorators.render('questions.html', 'questions', tabbed=False)
 106 def user_questions(request, mode, user, slug):
 107     user = get_object_or_404(User, id=user)
 108
 109     if mode == _('asked-by'):
 110         questions = Question.objects.filter(author=user)
 111         description = _("Questions asked by %s")
 112     elif mode == _('answered-by'):
 113         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 114         description = _("Questions answered by %s")
 115     elif mode == _('subscribed-by'):
 116         if not (request.user.is_superuser or request.user == user):
 117             return HttpResponseUnauthorized(request)
 118         questions = user.subscriptions
 119
 120         if request.user == user:
 121             description = _("Questions you subscribed %s")
 122         else:
 123             description = _("Questions subscribed by %s")
 124     else:
 125         raise Http404
 126
 127
 128     return question_list(request, questions,
 129                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 130                          request.utils.set_sort_method('active'),
 131                          page_title=description % user.username)
 132
 133 def question_list(request, initial,
 134                   list_description=_('questions'),
 135                   sort=None,
 136                   base_path=None,
 137                   page_title=_("All Questions"),
 138                   allowIgnoreTags=True,
 139                   feed_url=None,
 140                   paginator_context=None):
 141
 142     questions = initial.filter_state(deleted=False)
 143
 144     if request.user.is_authenticated() and allowIgnoreTags:
 145         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 146
 147     if page_title is None:
 148         page_title = _("Questions")
 149
 150     if request.GET.get('type', None) == 'rss':
 151         questions = questions.order_by('-added_at')
 152         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 153
 154     keywords =  ""
 155     if request.GET.get("q"):
 156         keywords = request.GET.get("q").strip()
 157
 158     answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 159     answer_description = _("answers")
 160
 161     if not feed_url:
 162         req_params = "&".join(["%s=%s" % (k, v) for k, v in request.GET.items() if not k in (_('page'), _('pagesize'), _('sort'))])
 163         if req_params:
 164             req_params = '&' + req_params
 165
 166         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 167
 168     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 169     "questions" : questions,
 170     "questions_count" : questions.count(),
 171     "answer_count" : answer_count,
 172     "keywords" : keywords,
 173     "list_description": list_description,
 174     "answer_description": answer_description,
 175     "base_path" : base_path,
 176     "page_title" : page_title,
 177     "tab" : "questions",
 178     'feed_url': feed_url,
 179     })
 180
 181
 182 def search(request):
 183     if request.method == "GET" and "q" in request.GET:
 184         keywords = request.GET.get("q")
 185         search_type = request.GET.get("t")
 186
 187         if not keywords:
 188             return HttpResponseRedirect(reverse(index))
 189         if search_type == 'tag':
 190             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 191         elif search_type == "user":
 192             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 193         elif search_type == "question":
 194             return question_search(request, keywords)
 195     else:
 196         return render_to_response("search.html", context_instance=RequestContext(request))
 197
 198 @decorators.render('questions.html')
 199 def question_search(request, keywords):
 200     can_rank, initial = Question.objects.search(keywords)
 201
 202     if can_rank:
 203         paginator_context = QuestionListPaginatorContext()
 204         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 205         paginator_context.force_sort = _('ranking')
 206     else:
 207         paginator_context = None
 208
 209     return question_list(request, initial,
 210                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 211                          False,
 212                          "%s?t=question&q=%s" % (reverse('search'),django_urlquote(keywords)),
 213                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 214                          paginator_context=paginator_context)
 215
 216
 217 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 218 def tags(request):
 219     stag = ""
 220     tags = Tag.active.all()
 221
 222     if request.method == "GET":
 223         stag = request.GET.get("q", "").strip()
 224         if stag:
 225             tags = tags.filter(name__contains=stag)
 226
 227     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 228         "tags" : tags,
 229         "stag" : stag,
 230         "keywords" : stag
 231     })
 232
 233 def update_question_view_times(request, question):
 234     if not 'last_seen_in_question' in request.session:
 235         request.session['last_seen_in_question'] = {}
 236
 237     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 238
 239     if (not last_seen) or last_seen < question.last_activity_at:
 240         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 241         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 242
 243     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 244
 245 def match_question_slug(slug):
 246     slug_words = slug.split('-')
 247     qs = Question.objects.filter(title__istartswith=slug_words[0])
 248
 249     for q in qs:
 250         if slug == urlquote(slugify(q.title)):
 251             return q
 252
 253     return None
 254
 255 def answer_redirect(request, answer):
 256     pc = AnswerPaginatorContext()
 257
 258     sort = pc.sort(request)
 259
 260     if sort == _('oldest'):
 261         filter = Q(added_at__lt=answer.added_at)
 262     elif sort == _('newest'):
 263         filter = Q(added_at__gt=answer.added_at)
 264     elif sort == _('votes'):
 265         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 266     else:
 267         raise Http404()
 268
 269     count = answer.question.answers.filter(Q(marked=True) | filter).count()
 270     pagesize = pc.pagesize(request)
 271
 272     page = count / pagesize
 273
 274     if count % pagesize:
 275         page += 1
 276
 277     if page == 0:
 278         page = 1
 279
 280     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 281         answer.question.get_absolute_url(), _('page'), page, answer.id))
 282
 283 @decorators.render("question.html", 'questions')
 284 def question(request, id, slug=None, answer=None):
 285     try:
 286         question = Question.objects.get(id=id)
 287     except:
 288         if slug:
 289             question = match_question_slug(slug)
 290             if question is not None:
 291                 return HttpResponseRedirect(question.get_absolute_url())
 292
 293         raise Http404()
 294
 295     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 296         raise Http404
 297
 298     if request.GET.get('type', None) == 'rss':
 299         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 300
 301     if answer:
 302         answer = get_object_or_404(Answer, id=answer)
 303
 304         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 305             raise Http404
 306
 307         if answer.marked:
 308             return HttpResponsePermanentRedirect(question.get_absolute_url())
 309
 310         return answer_redirect(request, answer)
 311
 312     if (not slug) or (slug != urlquote(slugify(question.title))):
 313         return HttpResponsePermanentRedirect(question.get_absolute_url())
 314
 315     if request.POST:
 316         answer_form = AnswerForm(question, request.POST)
 317     else:
 318         answer_form = AnswerForm(question)
 319
 320     answers = request.user.get_visible_answers(question)
 321
 322     update_question_view_times(request, question)
 323
 324     if request.user.is_authenticated():
 325         try:
 326             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 327         except:
 328             subscription = False
 329     else:
 330         subscription = False
 331
 332     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 333     "question" : question,
 334     "answer" : answer_form,
 335     "answers" : answers,
 336     "similar_questions" : question.get_related_questions(),
 337     "subscription": subscription,
 338     })
 339
 340
 341 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 342
 343 def revisions(request, id):
 344     post = get_object_or_404(Node, id=id).leaf
 345     revisions = list(post.revisions.order_by('revised_at'))
 346     rev_ctx = []
 347
 348     for i, revision in enumerate(revisions):
 349         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 350         'title': revision.title,
 351         'html': revision.html,
 352         'tags': revision.tagname_list(),
 353         }))))
 354
 355         if i > 0:
 356             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 357         else:
 358             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 359
 360         if not (revision.summary):
 361             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 362         else:
 363             rev_ctx[i]['summary'] = revision.summary
 364
 365     rev_ctx.reverse()
 366
 367     return render_to_response('revisions.html', {
 368     'post': post,
 369     'revisions': rev_ctx,
 370     }, context_instance=RequestContext(request))
 371
 372
 373