forum/views/readers.py

   1 # encoding:utf-8
   2 import datetime
   3 import logging
   4 from urllib import unquote
   5 from django.conf import settings as django_settings
   6 from django.shortcuts import render_to_response, get_object_or_404
   7 from django.http import HttpResponseRedirect, HttpResponse, HttpResponseForbidden, 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
  24 from forum.utils.diff import textDiff as htmldiff
  25 from forum.forms import *
  26 from forum.models import *
  27 from forum.const import *
  28 from forum.utils.forms import get_next_url
  29 from forum.models.question import question_view
  30 import decorators
  31
  32 # used in index page
  33 #refactor - move these numbers somewhere?
  34 INDEX_PAGE_SIZE = 30
  35 INDEX_AWARD_SIZE = 15
  36 INDEX_TAGS_SIZE = 25
  37 # used in tags list
  38 DEFAULT_PAGE_SIZE = 60
  39 # used in questions
  40 QUESTIONS_PAGE_SIZE = 30
  41 # used in answers
  42 ANSWERS_PAGE_SIZE = 10
  43
  44 #system to display main content
  45 def _get_tags_cache_json():#service routine used by views requiring tag list in the javascript space
  46     """returns list of all tags in json format
  47     no caching yet, actually
  48     """
  49     tags = Tag.objects.filter(deleted=False).all()
  50     tags_list = []
  51     for tag in tags:
  52         dic = {'n': tag.name, 'c': tag.used_count}
  53         tags_list.append(dic)
  54     tags = simplejson.dumps(tags_list)
  55     return tags
  56
  57 @decorators.render('index.html')
  58 def index(request):
  59     return question_list(request, Question.objects.all(), sort='active', base_path=reverse('questions'))
  60
  61 @decorators.render('questions.html', 'unanswered')
  62 def unanswered(request):
  63     return question_list(request, Question.objects.filter(accepted_answer=None),
  64                          _('Open questions without an accepted answer'))
  65
  66 @decorators.render('questions.html', 'questions')
  67 def questions(request):
  68     return question_list(request, Question.objects.all())
  69
  70 @decorators.render('questions.html')
  71 def tag(request, tag):
  72     return question_list(request, Question.objects.filter(tags__name=unquote(tag)),
  73                         mark_safe(_('Questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}))
  74
  75 @decorators.list('questions', QUESTIONS_PAGE_SIZE)
  76 def question_list(request, initial, list_description=_('questions'), sort=None, base_path=None):
  77     pagesize = request.utils.page_size(QUESTIONS_PAGE_SIZE)
  78     page = int(request.GET.get('page', 1))
  79
  80     questions = initial.filter(deleted=False)
  81
  82     if request.user.is_authenticated():
  83         questions = questions.filter(
  84                 ~Q(tags__id__in=request.user.marked_tags.filter(user_selections__reason='bad')))
  85
  86     if sort is not False:
  87         if sort is None:
  88             sort = request.utils.sort_method('latest')
  89         else:
  90             request.utils.set_sort_method(sort)
  91
  92         view_dic = {"latest":"-added_at", "active":"-last_activity_at", "hottest":"-answer_count", "mostvoted":"-score" }
  93
  94         questions=questions.order_by(view_dic.get(sort, '-added_at'))
  95
  96     return {
  97         "questions" : questions,
  98         "questions_count" : questions.count(),
  99         "tags_autocomplete" : _get_tags_cache_json(),
 100         "list_description": list_description,
 101         "base_path" : base_path,
 102         }
 103
 104
 105 def search(request):
 106     if request.method == "GET" and "q" in request.GET:
 107         keywords = request.GET.get("q")
 108         search_type = request.GET.get("t")
 109
 110         if not keywords:
 111             return HttpResponseRedirect(reverse(index))
 112         if search_type == 'tag':
 113             return HttpResponseRedirect(reverse('tags') + '?q=%s' % (keywords.strip()))
 114         elif search_type == "user":
 115             return HttpResponseRedirect(reverse('users') + '?q=%s' % (keywords.strip()))
 116         elif search_type == "question":
 117             return question_search(request, keywords)
 118     else:
 119         return render_to_response("search.html", context_instance=RequestContext(request))
 120
 121 @decorators.render('questions.html')
 122 def question_search(request, keywords):
 123     def question_search(keywords):
 124         return Question.objects.filter(Q(title__icontains=keywords) | Q(body__icontains=keywords))
 125
 126     from forum.modules import get_handler
 127
 128     question_search = get_handler('question_search', question_search)
 129     initial = question_search(keywords)
 130
 131     return question_list(request, initial, _("questions matching '%(keywords)s'") % {'keywords': keywords},
 132             base_path="%s?t=question&q=%s" % (reverse('search'), django_urlquote(keywords)), sort=False)
 133
 134
 135 def tags(request):#view showing a listing of available tags - plain list
 136     stag = ""
 137     is_paginated = True
 138     sortby = request.GET.get('sort', 'used')
 139     try:
 140         page = int(request.GET.get('page', '1'))
 141     except ValueError:
 142         page = 1
 143
 144     if request.method == "GET":
 145         stag = request.GET.get("q", "").strip()
 146         if stag != '':
 147             objects_list = Paginator(Tag.objects.filter(deleted=False).exclude(used_count=0).extra(where=['name like %s'], params=['%' + stag + '%']), DEFAULT_PAGE_SIZE)
 148         else:
 149             if sortby == "name":
 150                 objects_list = Paginator(Tag.objects.all().filter(deleted=False).exclude(used_count=0).order_by("name"), DEFAULT_PAGE_SIZE)
 151             else:
 152                 objects_list = Paginator(Tag.objects.all().filter(deleted=False).exclude(used_count=0).order_by("-used_count"), DEFAULT_PAGE_SIZE)
 153
 154     try:
 155         tags = objects_list.page(page)
 156     except (EmptyPage, InvalidPage):
 157         tags = objects_list.page(objects_list.num_pages)
 158
 159     return render_to_response('tags.html', {
 160                                             "tags" : tags,
 161                                             "stag" : stag,
 162                                             "tab_id" : sortby,
 163                                             "keywords" : stag,
 164                                             "context" : {
 165                                                 'is_paginated' : is_paginated,
 166                                                 'pages': objects_list.num_pages,
 167                                                 'page': page,
 168                                                 'has_previous': tags.has_previous(),
 169                                                 'has_next': tags.has_next(),
 170                                                 'previous': tags.previous_page_number(),
 171                                                 'next': tags.next_page_number(),
 172                                                 'base_url' : reverse('tags') + '?sort=%s&' % sortby
 173                                             }
 174                                 }, context_instance=RequestContext(request))
 175
 176 def get_answer_sort_order(request):
 177     view_dic = {"latest":"-added_at", "oldest":"added_at", "votes":"-score" }
 178
 179     view_id = request.GET.get('sort', request.session.get('answer_sort_order', None))
 180
 181     if view_id is None or not view_id in view_dic:
 182         view_id = "votes"
 183
 184     if view_id != request.session.get('answer_sort_order', None):
 185         request.session['answer_sort_order'] = view_id
 186
 187     return (view_id, view_dic[view_id])
 188
 189 def update_question_view_times(request, question):
 190     if not 'last_seen_in_question' in request.session:
 191         request.session['last_seen_in_question'] = {}
 192
 193     last_seen = request.session['last_seen_in_question'].get(question.id,None)
 194
 195     if (not last_seen) or last_seen < question.last_activity_at:
 196         question_view.send(sender=update_question_view_times, instance=question, user=request.user)
 197         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 198
 199     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 200
 201 def match_question_slug(slug):
 202     slug_words = slug.split('-')
 203     qs = Question.objects.filter(node_type="question", title__istartswith=slug_words[0])
 204
 205     for q in qs:
 206         if slug == urlquote(slugify(q.title)):
 207             return q
 208
 209     return None
 210
 211 def question(request, id, slug):
 212     try:
 213         question = Question.objects.get(node_type="question", id=id)
 214     except:
 215         question = match_question_slug(slug)
 216         if question is not None:
 217             return HttpResponsePermanentRedirect(question.get_absolute_url())
 218         else:
 219             raise Http404()
 220
 221     if slug != urlquote(slugify(question.title)):
 222         return HttpResponsePermanentRedirect(question.get_absolute_url())
 223
 224     page = int(request.GET.get('page', 1))
 225     view_id, order_by = get_answer_sort_order(request)
 226
 227     if question.deleted and not request.user.can_view_deleted_post(question):
 228         raise Http404
 229
 230     answer_form = AnswerForm(question)
 231     answers = request.user.get_visible_answers(question)
 232
 233     if answers is not None:
 234         answers = [a for a in answers.order_by("-accepted", order_by)
 235                    if not a.deleted or a.author == request.user]
 236
 237     objects_list = Paginator(answers, ANSWERS_PAGE_SIZE)
 238     page_objects = objects_list.page(page)
 239
 240     update_question_view_times(request, question)
 241
 242     if request.user.is_authenticated():
 243         try:
 244             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 245         except:
 246             subscription = False
 247     else:
 248         subscription = False
 249
 250     return render_to_response('question.html', {
 251         "question" : question,
 252         "answer" : answer_form,
 253         "answers" : page_objects.object_list,
 254         "tags" : question.tags.all(),
 255         "tab_id" : view_id,
 256         "similar_questions" : question.get_related_questions(),
 257         "subscription": subscription,
 258         "context" : {
 259             'is_paginated' : True,
 260             'pages': objects_list.num_pages,
 261             'page': page,
 262             'has_previous': page_objects.has_previous(),
 263             'has_next': page_objects.has_next(),
 264             'previous': page_objects.previous_page_number(),
 265             'next': page_objects.next_page_number(),
 266             'base_url' : request.path + '?sort=%s&' % view_id,
 267             'extend_url' : "#sort-top"
 268         }
 269         }, context_instance=RequestContext(request))
 270
 271
 272 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 273
 274 def revisions(request, id):
 275     post = get_object_or_404(Node, id=id).leaf
 276     revisions = list(post.revisions.order_by('revised_at'))
 277
 278     rev_ctx = []
 279
 280     for i, revision in enumerate(revisions):
 281         rev_ctx.append(dict(inst=revision, html=REVISION_TEMPLATE.render(template.Context({
 282                 'title': revision.title,
 283                 'html': revision.html,
 284                 'tags': revision.tagname_list(),
 285         }))))
 286
 287         if i > 0:
 288             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 289         else:
 290             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 291
 292         if not (revision.summary):
 293             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 294         else:
 295             rev_ctx[i]['summary'] = revision.summary
 296
 297     return render_to_response('revisions_question.html', {
 298                               'post': post,
 299                               'revisions': rev_ctx,
 300                               }, context_instance=RequestContext(request))
 301
 302
 303