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 import decorators
  33
  34 class HottestQuestionsSort(pagination.SortBase):
  35     def apply(self, questions):
  36         return questions.annotate(new_child_count=Count('all_children')).filter(
  37                 all_children__added_at__gt=datetime.datetime.now() - datetime.timedelta(days=1)).order_by('-new_child_count')
  38
  39
  40 class QuestionListPaginatorContext(pagination.PaginatorContext):
  41     def __init__(self, id='QUESTIONS_LIST', prefix='', default_pagesize=30):
  42         super (QuestionListPaginatorContext, self).__init__(id, sort_methods=(
  43             (_('active'), pagination.SimpleSort(_('active'), '-last_activity_at', _("Most <strong>recently updated</strong> questions"))),
  44             (_('newest'), pagination.SimpleSort(_('newest'), '-added_at', _("most <strong>recently asked</strong> questions"))),
  45             (_('hottest'), HottestQuestionsSort(_('hottest'), _("most <strong>active</strong> questions in the last 24 hours</strong>"))),
  46             (_('mostvoted'), pagination.SimpleSort(_('most voted'), '-score', _("most <strong>voted</strong> questions"))),
  47         ), pagesizes=(15, 30, 50), default_pagesize=default_pagesize, prefix=prefix)
  48
  49 class AnswerPaginatorContext(pagination.PaginatorContext):
  50     def __init__(self, id='ANSWER_LIST', prefix='', default_pagesize=10):
  51         super (AnswerPaginatorContext, self).__init__(id, sort_methods=(
  52             (_('oldest'), pagination.SimpleSort(_('oldest answers'), ('-marked', 'added_at'), _("oldest answers will be shown first"))),
  53             (_('newest'), pagination.SimpleSort(_('newest answers'), ('-marked', '-added_at'), _("newest answers will be shown first"))),
  54             (_('votes'), pagination.SimpleSort(_('popular answers'), ('-marked', '-score', 'added_at'), _("most voted answers will be shown first"))),
  55         ), default_sort=_('votes'), pagesizes=(5, 10, 20), default_pagesize=default_pagesize, prefix=prefix)
  56
  57 class TagPaginatorContext(pagination.PaginatorContext):
  58     def __init__(self):
  59         super (TagPaginatorContext, self).__init__('TAG_LIST', sort_methods=(
  60             (_('name'), pagination.SimpleSort(_('by name'), 'name', _("sorted alphabetically"))),
  61             (_('used'), pagination.SimpleSort(_('by popularity'), '-used_count', _("sorted by frequency of tag use"))),
  62         ), default_sort=_('used'), pagesizes=(30, 60, 120))
  63
  64
  65 def feed(request):
  66     return RssQuestionFeed(
  67                 request,
  68                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  69                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  70                 settings.APP_DESCRIPTION)(request)
  71
  72
  73 @decorators.render('index.html')
  74 def index(request):
  75     paginator_context = QuestionListPaginatorContext()
  76     paginator_context.base_path = reverse('questions')
  77     return question_list(request,
  78                          Question.objects.all(),
  79                          base_path=reverse('questions'),
  80                          feed_url=reverse('latest_questions_feed'),
  81                          paginator_context=paginator_context)
  82
  83 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
  84 def unanswered(request):
  85     return question_list(request,
  86                          Question.objects.filter(extra_ref=None),
  87                          _('open questions without an accepted answer'),
  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'))
  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                          None,
 101                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
 102                          False)
 103
 104 @decorators.render('questions.html', 'questions', tabbed=False)
 105 def user_questions(request, mode, user, slug):
 106     user = get_object_or_404(User, id=user)
 107
 108     if mode == _('asked-by'):
 109         questions = Question.objects.filter(author=user)
 110         description = _("Questions asked by %s")
 111     elif mode == _('answered-by'):
 112         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 113         description = _("Questions answered by %s")
 114     elif mode == _('subscribed-by'):
 115         if not (request.user.is_superuser or request.user == user):
 116             return HttpResponseUnauthorized(request)
 117         questions = user.subscriptions
 118
 119         if request.user == user:
 120             description = _("Questions you subscribed %s")
 121         else:
 122             description = _("Questions subscribed by %s")
 123     else:
 124         raise Http404
 125
 126
 127     return question_list(request, questions,
 128                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 129                          page_title=description % user.username)
 130
 131 def question_list(request, initial,
 132                   list_description=_('questions'),
 133                   base_path=None,
 134                   page_title=_("All Questions"),
 135                   allowIgnoreTags=True,
 136                   feed_url=None,
 137                   paginator_context=None):
 138
 139     questions = initial.filter_state(deleted=False)
 140
 141     if request.user.is_authenticated() and allowIgnoreTags:
 142         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 143
 144     if page_title is None:
 145         page_title = _("Questions")
 146
 147     if request.GET.get('type', None) == 'rss':
 148         questions = questions.order_by('-added_at')
 149         return RssQuestionFeed(request, questions, page_title, list_description)(request)
 150
 151     keywords =  ""
 152     if request.GET.get("q"):
 153         keywords = request.GET.get("q").strip()
 154
 155     answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 156     answer_description = _("answers")
 157
 158     if not feed_url:
 159         req_params = "&".join(["%s=%s" % (k, v) for k, v in request.GET.items() if not k in (_('page'), _('pagesize'), _('sort'))])
 160         if req_params:
 161             req_params = '&' + req_params
 162
 163         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 164
 165     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 166     "questions" : questions,
 167     "questions_count" : questions.count(),
 168     "keywords" : keywords,
 169     "list_description": list_description,
 170     "base_path" : base_path,
 171     "page_title" : page_title,
 172     "tab" : "questions",
 173     'feed_url': feed_url,
 174     })
 175
 176
 177 def search(request):
 178     if request.method == "GET" and "q" in request.GET:
 179         keywords = request.GET.get("q")
 180         search_type = request.GET.get("t")
 181
 182         if not keywords:
 183             return HttpResponseRedirect(reverse(index))
 184         if search_type == 'tag':
 185             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 186         elif search_type == "user":
 187             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 188         elif search_type == "question":
 189             return question_search(request, keywords)
 190     else:
 191         return render_to_response("search.html", context_instance=RequestContext(request))
 192
 193 @decorators.render('questions.html')
 194 def question_search(request, keywords):
 195     can_rank, initial = Question.objects.search(keywords)
 196
 197     if can_rank:
 198         paginator_context = QuestionListPaginatorContext()
 199         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 200         paginator_context.force_sort = _('ranking')
 201     else:
 202         paginator_context = None
 203
 204     return question_list(request, initial,
 205                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 206                          None,
 207                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 208                          paginator_context=paginator_context)
 209
 210
 211 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 212 def tags(request):
 213     stag = ""
 214     tags = Tag.active.all()
 215
 216     if request.method == "GET":
 217         stag = request.GET.get("q", "").strip()
 218         if stag:
 219             tags = tags.filter(name__contains=stag)
 220
 221     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 222         "tags" : tags,
 223         "stag" : stag,
 224         "keywords" : stag
 225     })
 226
 227 def update_question_view_times(request, question):
 228     if not 'last_seen_in_question' in request.session:
 229         request.session['last_seen_in_question'] = {}
 230
 231     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 232
 233     if (not last_seen) or last_seen < question.last_activity_at:
 234         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 235         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 236
 237     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 238
 239 def match_question_slug(slug):
 240     slug_words = slug.split('-')
 241     qs = Question.objects.filter(title__istartswith=slug_words[0])
 242
 243     for q in qs:
 244         if slug == urlquote(slugify(q.title)):
 245             return q
 246
 247     return None
 248
 249 def answer_redirect(request, answer):
 250     pc = AnswerPaginatorContext()
 251
 252     sort = pc.sort(request)
 253
 254     if sort == _('oldest'):
 255         filter = Q(added_at__lt=answer.added_at)
 256     elif sort == _('newest'):
 257         filter = Q(added_at__gt=answer.added_at)
 258     elif sort == _('votes'):
 259         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 260     else:
 261         raise Http404()
 262
 263     count = answer.question.answers.filter(Q(marked=True) | filter).count()
 264     pagesize = pc.pagesize(request)
 265
 266     page = count / pagesize
 267
 268     if count % pagesize:
 269         page += 1
 270
 271     if page == 0:
 272         page = 1
 273
 274     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 275         answer.question.get_absolute_url(), _('page'), page, answer.id))
 276
 277 @decorators.render("question.html", 'questions')
 278 def question(request, id, slug='', answer=None):
 279     try:
 280         question = Question.objects.get(id=id)
 281     except:
 282         if slug:
 283             question = match_question_slug(slug)
 284             if question is not None:
 285                 return HttpResponseRedirect(question.get_absolute_url())
 286
 287         raise Http404()
 288
 289     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 290         raise Http404
 291
 292     if request.GET.get('type', None) == 'rss':
 293         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
 294
 295     if answer:
 296         answer = get_object_or_404(Answer, id=answer)
 297
 298         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
 299             raise Http404
 300
 301         if answer.marked:
 302             return HttpResponsePermanentRedirect(question.get_absolute_url())
 303
 304         return answer_redirect(request, answer)
 305
 306     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
 307         return HttpResponsePermanentRedirect(question.get_absolute_url())
 308
 309     if request.POST:
 310         answer_form = AnswerForm(question, request.POST)
 311     else:
 312         answer_form = AnswerForm(question)
 313
 314     answers = request.user.get_visible_answers(question)
 315
 316     update_question_view_times(request, question)
 317
 318     if request.user.is_authenticated():
 319         try:
 320             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 321         except:
 322             subscription = False
 323     else:
 324         subscription = False
 325
 326     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 327     "question" : question,
 328     "answer" : answer_form,
 329     "answers" : answers,
 330     "similar_questions" : question.get_related_questions(),
 331     "subscription": subscription,
 332     })
 333
 334
 335 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 336
 337 def revisions(request, id):
 338     post = get_object_or_404(Node, id=id).leaf
 339     revisions = list(post.revisions.order_by('revised_at'))
 340     rev_ctx = []
 341
 342     for i, revision in enumerate(revisions):
 343         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 344         'title': revision.title,
 345         'html': revision.html,
 346         'tags': revision.tagname_list(),
 347         }))))
 348
 349         if i > 0:
 350             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 351         else:
 352             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 353
 354         if not (revision.summary):
 355             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 356         else:
 357             rev_ctx[i]['summary'] = revision.summary
 358
 359     rev_ctx.reverse()
 360
 361     return render_to_response('revisions.html', {
 362     'post': post,
 363     'revisions': rev_ctx,
 364     }, context_instance=RequestContext(request))
 365
 366
 367