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 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         return RssQuestionFeed(questions, page_title, list_description, request)(request)
 152
 153     keywords =  ""
 154     if request.GET.get("q"):
 155         keywords = request.GET.get("q").strip()
 156
 157     answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 158     answer_description = _("answers")
 159
 160     if not feed_url:
 161         req_params = "&".join(["%s=%s" % (k, v) for k, v in request.GET.items() if not k in (_('page'), _('pagesize'), _('sort'))])
 162         if req_params:
 163             req_params = '&' + req_params
 164
 165         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 166
 167     return pagination.paginated(request, ('questions', paginator_context or QuestionListPaginatorContext()), {
 168     "questions" : questions,
 169     "questions_count" : questions.count(),
 170     "answer_count" : answer_count,
 171     "keywords" : keywords,
 172     "list_description": list_description,
 173     "answer_description": answer_description,
 174     "base_path" : base_path,
 175     "page_title" : page_title,
 176     "tab" : "questions",
 177     'feed_url': feed_url,
 178     })
 179
 180
 181 def search(request):
 182     if request.method == "GET" and "q" in request.GET:
 183         keywords = request.GET.get("q")
 184         search_type = request.GET.get("t")
 185
 186         if not keywords:
 187             return HttpResponseRedirect(reverse(index))
 188         if search_type == 'tag':
 189             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 190         elif search_type == "user":
 191             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 192         elif search_type == "question":
 193             return question_search(request, keywords)
 194     else:
 195         return render_to_response("search.html", context_instance=RequestContext(request))
 196
 197 @decorators.render('questions.html')
 198 def question_search(request, keywords):
 199     can_rank, initial = Question.objects.search(keywords)
 200
 201     if can_rank:
 202         paginator_context = QuestionListPaginatorContext()
 203         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), '-ranking', _("most relevant questions"))
 204         paginator_context.force_sort = _('ranking')
 205     else:
 206         paginator_context = None
 207
 208     return question_list(request, initial,
 209                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 210                          False,
 211                          "%s?t=question&q=%s" % (reverse('search'),django_urlquote(keywords)),
 212                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 213                          paginator_context=paginator_context)
 214
 215
 216 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 217 def tags(request):
 218     stag = ""
 219     tags = Tag.active.all()
 220
 221     if request.method == "GET":
 222         stag = request.GET.get("q", "").strip()
 223         if stag:
 224             tags = tags.filter(name__contains=stag)
 225
 226     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
 227         "tags" : tags,
 228         "stag" : stag,
 229         "keywords" : stag
 230     })
 231
 232 def update_question_view_times(request, question):
 233     if not 'last_seen_in_question' in request.session:
 234         request.session['last_seen_in_question'] = {}
 235
 236     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 237
 238     if (not last_seen) or last_seen < question.last_activity_at:
 239         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 240         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 241
 242     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 243
 244 def match_question_slug(slug):
 245     slug_words = slug.split('-')
 246     qs = Question.objects.filter(title__istartswith=slug_words[0])
 247
 248     for q in qs:
 249         if slug == urlquote(slugify(q.title)):
 250             return q
 251
 252     return None
 253
 254 def answer_redirect(request, answer):
 255     pc = AnswerPaginatorContext()
 256
 257     sort = pc.sort(request)
 258
 259     if sort == _('oldest'):
 260         filter = Q(added_at__lt=answer.added_at)
 261     elif sort == _('newest'):
 262         filter = Q(added_at__gt=answer.added_at)
 263     elif sort == _('votes'):
 264         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
 265     else:
 266         raise Http404()
 267
 268     count = answer.question.answers.filter(Q(marked=True) | filter).count()
 269     pagesize = pc.pagesize(request)
 270
 271     page = count / pagesize
 272
 273     if count % pagesize:
 274         page += 1
 275
 276     if page == 0:
 277         page = 1
 278
 279     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
 280         answer.question.get_absolute_url(), _('page'), page, answer.id))
 281
 282 @decorators.render("question.html", 'questions')
 283 def question(request, id, slug, answer=None):
 284     try:
 285         question = Question.objects.get(id=id)
 286     except:
 287         if slug:
 288             question = match_question_slug(slug)
 289             if question is not None:
 290                 return HttpResponseRedirect(question.get_absolute_url())
 291
 292         raise Http404()
 293
 294     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 295         raise Http404
 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 request.POST:
 309         answer_form = AnswerForm(question, request.POST)
 310     else:
 311         answer_form = AnswerForm(question)
 312
 313     answers = request.user.get_visible_answers(question)
 314
 315     update_question_view_times(request, question)
 316
 317     if request.user.is_authenticated():
 318         try:
 319             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 320         except:
 321             subscription = False
 322     else:
 323         subscription = False
 324
 325     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
 326     "question" : question,
 327     "answer" : answer_form,
 328     "answers" : answers,
 329     "similar_questions" : question.get_related_questions(),
 330     "subscription": subscription,
 331     })
 332
 333
 334 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 335
 336 def revisions(request, id):
 337     post = get_object_or_404(Node, id=id).leaf
 338     revisions = list(post.revisions.order_by('revised_at'))
 339     rev_ctx = []
 340
 341     for i, revision in enumerate(revisions):
 342         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 343         'title': revision.title,
 344         'html': revision.html,
 345         'tags': revision.tagname_list(),
 346         }))))
 347
 348         if i > 0:
 349             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 350         else:
 351             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 352
 353         if not (revision.summary):
 354             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 355         else:
 356             rev_ctx[i]['summary'] = revision.summary
 357
 358     rev_ctx.reverse()
 359
 360     return render_to_response('revisions.html', {
 361     'post': post,
 362     'revisions': rev_ctx,
 363     }, context_instance=RequestContext(request))
 364
 365
 366