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 def feed(request):
  56     return RssQuestionFeed(
  57                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
  58                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
  59                 settings.APP_DESCRIPTION,
  60                 request)(request)
  61
  62
  63 @decorators.render('index.html')
  64 def index(request):
  65     return question_list(request,
  66                          Question.objects.all(),
  67                          sort=request.utils.set_sort_method('active'),
  68                          base_path=reverse('questions'),
  69                          feed_url=reverse('latest_questions_feed'))
  70
  71 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
  72 def unanswered(request):
  73     return question_list(request,
  74                          Question.objects.filter(extra_ref=None),
  75                          _('open questions without an accepted answer'),
  76                          request.utils.set_sort_method('active'),
  77                          None,
  78                          _("Unanswered Questions"))
  79
  80 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
  81 def questions(request):
  82     return question_list(request, Question.objects.all(), _('questions'), request.utils.set_sort_method('active'))
  83
  84 @decorators.render('questions.html')
  85 def tag(request, tag):
  86     return question_list(request,
  87                          Question.objects.filter(tags__name=unquote(tag)),
  88                          mark_safe(_('questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
  89                          request.utils.set_sort_method('active'),
  90                          None,
  91                          mark_safe(_('Questions Tagged With %(tag)s') % {'tag': tag}),
  92                          False)
  93
  94 @decorators.render('questions.html', 'questions', tabbed=False)
  95 def user_questions(request, mode, user, slug):
  96     user = get_object_or_404(User, id=user)
  97
  98     if mode == _('asked-by'):
  99         questions = Question.objects.filter(author=user)
 100         description = _("Questions asked by %s")
 101     elif mode == _('answered-by'):
 102         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
 103         description = _("Questions answered by %s")
 104     elif mode == _('subscribed-by'):
 105         if not (request.user.is_superuser or request.user == user):
 106             return HttpResponseUnauthorized(request)
 107         questions = user.subscriptions
 108
 109         if request.user == user:
 110             description = _("Questions you subscribed %s")
 111         else:
 112             description = _("Questions subscribed by %s")
 113     else:
 114         raise Http404
 115
 116
 117     return question_list(request, questions,
 118                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
 119                          request.utils.set_sort_method('active'),
 120                          page_title=description % user.username)
 121
 122 def question_list(request, initial,
 123                   list_description=_('questions'),
 124                   sort=None,
 125                   base_path=None,
 126                   page_title=_("All Questions"),
 127                   allowIgnoreTags=True,
 128                   feed_url=None,
 129                   paginator_context=None):
 130
 131     questions = initial.filter_state(deleted=False)
 132
 133     if request.user.is_authenticated() and allowIgnoreTags:
 134         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
 135
 136     if page_title is None:
 137         page_title = _("Questions")
 138
 139     if request.GET.get('type', None) == 'rss':
 140         return RssQuestionFeed(questions, page_title, list_description, request)(request)
 141
 142     keywords =  ""
 143     if request.GET.get("q"):
 144         keywords = request.GET.get("q").strip()
 145
 146     answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
 147     answer_description = _("answers")
 148
 149     if not feed_url:
 150         req_params = "&".join(["%s=%s" % (k, v) for k, v in request.GET.items() if not k in (_('page'), _('pagesize'), _('sort'))])
 151         if req_params:
 152             req_params = '&' + req_params
 153
 154         feed_url = mark_safe(request.path + "?type=rss" + req_params)
 155
 156     return pagination.paginated(request, 'questions', paginator_context or QuestionListPaginatorContext(), {
 157     "questions" : questions,
 158     "questions_count" : questions.count(),
 159     "answer_count" : answer_count,
 160     "keywords" : keywords,
 161     "list_description": list_description,
 162     "answer_description": answer_description,
 163     "base_path" : base_path,
 164     "page_title" : page_title,
 165     "tab" : "questions",
 166     'feed_url': feed_url,
 167     })
 168
 169
 170 def search(request):
 171     if request.method == "GET" and "q" in request.GET:
 172         keywords = request.GET.get("q")
 173         search_type = request.GET.get("t")
 174
 175         if not keywords:
 176             return HttpResponseRedirect(reverse(index))
 177         if search_type == 'tag':
 178             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
 179         elif search_type == "user":
 180             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
 181         elif search_type == "question":
 182             return question_search(request, keywords)
 183     else:
 184         return render_to_response("search.html", context_instance=RequestContext(request))
 185
 186 @decorators.render('questions.html')
 187 def question_search(request, keywords):
 188     can_rank, initial = Question.objects.search(keywords)
 189
 190     if can_rank:
 191         paginator_context = QuestionListPaginatorContext()
 192         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('ranking'), '-ranking', _("most relevant questions"))
 193     else:
 194         paginator_context = None
 195
 196     return question_list(request, initial,
 197                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 198                          False,
 199                          "%s?t=question&q=%s" % (reverse('search'),django_urlquote(keywords)),
 200                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
 201                          paginator_context=paginator_context)
 202
 203
 204 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
 205 def tags(request):
 206     stag = ""
 207     is_paginated = True
 208     sortby = request.GET.get('sort', 'used')
 209     try:
 210         page = int(request.GET.get('page', '1'))
 211     except ValueError:
 212         page = 1
 213
 214     if request.method == "GET":
 215         stag = request.GET.get("q", "").strip()
 216         if stag != '':
 217             objects_list = Paginator(Tag.active.filter(name__contains=stag), DEFAULT_PAGE_SIZE)
 218         else:
 219             if sortby == "name":
 220                 objects_list = Paginator(Tag.active.order_by("name"), DEFAULT_PAGE_SIZE)
 221             else:
 222                 objects_list = Paginator(Tag.active.order_by("-used_count"), DEFAULT_PAGE_SIZE)
 223
 224     try:
 225         tags = objects_list.page(page)
 226     except (EmptyPage, InvalidPage):
 227         tags = objects_list.page(objects_list.num_pages)
 228
 229     return {
 230         "tags" : tags,
 231         "stag" : stag,
 232         "tab_id" : sortby,
 233         "keywords" : stag,
 234         "context" : {
 235             'is_paginated' : is_paginated,
 236             'pages': objects_list.num_pages,
 237             'page': page,
 238             'has_previous': tags.has_previous(),
 239             'has_next': tags.has_next(),
 240             'previous': tags.previous_page_number(),
 241             'next': tags.next_page_number(),
 242             'base_url' : reverse('tags') + '?sort=%s&' % sortby
 243         }
 244     }
 245
 246 def get_answer_sort_order(request):
 247     view_dic = {"latest":"-added_at", "oldest":"added_at", "votes":"-score" }
 248
 249     view_id = request.GET.get('sort', request.session.get('answer_sort_order', None))
 250
 251     if view_id is None or not view_id in view_dic:
 252         view_id = "votes"
 253
 254     if view_id != request.session.get('answer_sort_order', None):
 255         request.session['answer_sort_order'] = view_id
 256
 257     return (view_id, view_dic[view_id])
 258
 259 def update_question_view_times(request, question):
 260     if not 'last_seen_in_question' in request.session:
 261         request.session['last_seen_in_question'] = {}
 262
 263     last_seen = request.session['last_seen_in_question'].get(question.id, None)
 264
 265     if (not last_seen) or last_seen < question.last_activity_at:
 266         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
 267         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 268
 269     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 270
 271 def match_question_slug(slug):
 272     slug_words = slug.split('-')
 273     qs = Question.objects.filter(title__istartswith=slug_words[0])
 274
 275     for q in qs:
 276         if slug == urlquote(slugify(q.title)):
 277             return q
 278
 279     return None
 280
 281 def question(request, id, slug):
 282     try:
 283         question = Question.objects.get(id=id)
 284     except:
 285         if slug:
 286             question = match_question_slug(slug)
 287             if question is not None:
 288                 return HttpResponsePermanentRedirect(question.get_absolute_url())
 289
 290         raise Http404()
 291
 292     page = int(request.GET.get('page', 1))
 293     view_id, order_by = get_answer_sort_order(request)
 294
 295     if question.nis.deleted and not request.user.can_view_deleted_post(question):
 296         raise Http404
 297
 298     if request.POST:
 299         answer_form = AnswerForm(question, request.POST)
 300     else:
 301         answer_form = AnswerForm(question)
 302
 303     answers = request.user.get_visible_answers(question)
 304
 305     if answers is not None:
 306         answers = [a for a in answers.order_by("-marked", order_by)
 307                    if not a.nis.deleted or a.author == request.user]
 308
 309     objects_list = Paginator(answers, ANSWERS_PAGE_SIZE)
 310     page_objects = objects_list.page(page)
 311
 312     update_question_view_times(request, question)
 313
 314     if request.user.is_authenticated():
 315         try:
 316             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 317         except:
 318             subscription = False
 319     else:
 320         subscription = False
 321
 322     return render_to_response('question.html', {
 323     "question" : question,
 324     "answer" : answer_form,
 325     "answers" : page_objects.object_list,
 326     "tab_id" : view_id,
 327     "similar_questions" : question.get_related_questions(),
 328     "subscription": subscription,
 329     "context" : {
 330     'is_paginated' : True,
 331     'pages': objects_list.num_pages,
 332     'page': page,
 333     'has_previous': page_objects.has_previous(),
 334     'has_next': page_objects.has_next(),
 335     'previous': page_objects.previous_page_number(),
 336     'next': page_objects.next_page_number(),
 337     'base_url' : request.path + '?sort=%s&' % view_id,
 338     'extend_url' : "#sort-top"
 339     }
 340     }, context_instance=RequestContext(request))
 341
 342
 343 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 344
 345 def revisions(request, id):
 346     post = get_object_or_404(Node, id=id).leaf
 347     revisions = list(post.revisions.order_by('revised_at'))
 348     rev_ctx = []
 349
 350     for i, revision in enumerate(revisions):
 351         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
 352         'title': revision.title,
 353         'html': revision.html,
 354         'tags': revision.tagname_list(),
 355         }))))
 356
 357         if i > 0:
 358             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 359         else:
 360             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 361
 362         if not (revision.summary):
 363             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 364         else:
 365             rev_ctx[i]['summary'] = revision.summary
 366
 367     rev_ctx.reverse()
 368
 369     return render_to_response('revisions.html', {
 370     'post': post,
 371     'revisions': rev_ctx,
 372     }, context_instance=RequestContext(request))
 373
 374
 375