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
   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='latest', 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 None:
  87         sort = request.utils.sort_method('latest')
  88     else:
  89         request.utils.set_sort_method(sort)
  90
  91     view_dic = {"latest":"-added_at", "active":"-last_activity_at", "hottest":"-answer_count", "mostvoted":"-score" }
  92
  93     questions=questions.order_by(view_dic.get(sort, '-added_at'))
  94
  95     return {
  96         "questions" : questions,
  97         "questions_count" : questions.count(),
  98         "tags_autocomplete" : _get_tags_cache_json(),
  99         "list_description": list_description,
 100         "base_path" : base_path,
 101         }
 102
 103
 104 def search(request):
 105     if request.method == "GET" and "q" in request.GET:
 106         keywords = request.GET.get("q")
 107         search_type = request.GET.get("t")
 108
 109         if not keywords:
 110             return HttpResponseRedirect(reverse(index))
 111         if search_type == 'tag':
 112             return HttpResponseRedirect(reverse('tags') + '?q=%s' % (keywords.strip()))
 113         elif search_type == "user":
 114             return HttpResponseRedirect(reverse('users') + '?q=%s' % (keywords.strip()))
 115         elif search_type == "question":
 116             return question_search(request, keywords)
 117     else:
 118         return render_to_response("search.html", context_instance=RequestContext(request))
 119
 120 @decorators.render('questions.html')
 121 def question_search(request, keywords):
 122     def question_search(keywords, orderby):
 123         return Question.objects.filter(Q(title__icontains=keywords) | Q(html__icontains=keywords))
 124
 125     from forum.modules import get_handler
 126
 127     question_search = get_handler('question_search', question_search)
 128     initial = question_search(keywords)
 129
 130     return question_list(request, initial, _("questions matching '%(keywords)s'") % {'keywords': keywords},
 131             base_path="%s?t=question&q=%s" % (reverse('search'), django_urlquote(keywords)))
 132
 133
 134 def tags(request):#view showing a listing of available tags - plain list
 135     stag = ""
 136     is_paginated = True
 137     sortby = request.GET.get('sort', 'used')
 138     try:
 139         page = int(request.GET.get('page', '1'))
 140     except ValueError:
 141         page = 1
 142
 143     if request.method == "GET":
 144         stag = request.GET.get("q", "").strip()
 145         if stag != '':
 146             objects_list = Paginator(Tag.objects.filter(deleted=False).exclude(used_count=0).extra(where=['name like %s'], params=['%' + stag + '%']), DEFAULT_PAGE_SIZE)
 147         else:
 148             if sortby == "name":
 149                 objects_list = Paginator(Tag.objects.all().filter(deleted=False).exclude(used_count=0).order_by("name"), DEFAULT_PAGE_SIZE)
 150             else:
 151                 objects_list = Paginator(Tag.objects.all().filter(deleted=False).exclude(used_count=0).order_by("-used_count"), DEFAULT_PAGE_SIZE)
 152
 153     try:
 154         tags = objects_list.page(page)
 155     except (EmptyPage, InvalidPage):
 156         tags = objects_list.page(objects_list.num_pages)
 157
 158     return render_to_response('tags.html', {
 159                                             "tags" : tags,
 160                                             "stag" : stag,
 161                                             "tab_id" : sortby,
 162                                             "keywords" : stag,
 163                                             "context" : {
 164                                                 'is_paginated' : is_paginated,
 165                                                 'pages': objects_list.num_pages,
 166                                                 'page': page,
 167                                                 'has_previous': tags.has_previous(),
 168                                                 'has_next': tags.has_next(),
 169                                                 'previous': tags.previous_page_number(),
 170                                                 'next': tags.next_page_number(),
 171                                                 'base_url' : reverse('tags') + '?sort=%s&' % sortby
 172                                             }
 173                                 }, context_instance=RequestContext(request))
 174
 175 def get_answer_sort_order(request):
 176     view_dic = {"latest":"-added_at", "oldest":"added_at", "votes":"-score" }
 177
 178     view_id = request.GET.get('sort', request.session.get('answer_sort_order', None))
 179
 180     if view_id is None or not view_id in view_dic:
 181         view_id = "votes"
 182
 183     if view_id != request.session.get('answer_sort_order', None):
 184         request.session['answer_sort_order'] = view_id
 185
 186     return (view_id, view_dic[view_id])
 187
 188 def update_question_view_times(request, question):
 189     if not 'last_seen_in_question' in request.session:
 190         request.session['last_seen_in_question'] = {}
 191
 192     last_seen = request.session['last_seen_in_question'].get(question.id,None)
 193
 194     if (not last_seen) or last_seen < question.last_activity_at:
 195         question_view.send(sender=update_question_view_times, instance=question, user=request.user)
 196         request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 197
 198     request.session['last_seen_in_question'][question.id] = datetime.datetime.now()
 199
 200 def question(request, id, slug):
 201     question = get_object_or_404(Question, id=id)
 202
 203     if slug != urlquote(slugify(question.title)):
 204         return HttpResponseRedirect(question.get_absolute_url())
 205
 206     page = int(request.GET.get('page', 1))
 207     view_id, order_by = get_answer_sort_order(request)
 208
 209     if question.deleted and not request.user.can_view_deleted_post(question):
 210         raise Http404
 211
 212     answer_form = AnswerForm(question)
 213     answers = request.user.get_visible_answers(question)
 214
 215     if answers is not None:
 216         answers = [a for a in answers.order_by("-accepted", order_by)
 217                    if not a.deleted or a.author == request.user]
 218
 219     objects_list = Paginator(answers, ANSWERS_PAGE_SIZE)
 220     page_objects = objects_list.page(page)
 221
 222     update_question_view_times(request, question)
 223
 224     if request.user.is_authenticated():
 225         try:
 226             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
 227         except:
 228             subscription = False
 229     else:
 230         subscription = False
 231
 232     return render_to_response('question.html', {
 233         "question" : question,
 234         "answer" : answer_form,
 235         "answers" : page_objects.object_list,
 236         "tags" : question.tags.all(),
 237         "tab_id" : view_id,
 238         "similar_questions" : question.get_related_questions(),
 239         "subscription": subscription,
 240         "context" : {
 241             'is_paginated' : True,
 242             'pages': objects_list.num_pages,
 243             'page': page,
 244             'has_previous': page_objects.has_previous(),
 245             'has_next': page_objects.has_next(),
 246             'previous': page_objects.previous_page_number(),
 247             'next': page_objects.next_page_number(),
 248             'base_url' : request.path + '?sort=%s&' % view_id,
 249             'extend_url' : "#sort-top"
 250         }
 251         }, context_instance=RequestContext(request))
 252
 253
 254 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
 255
 256 def revisions(request, id):
 257     post = get_object_or_404(Node, id=id).leaf
 258     revisions = list(post.revisions.order_by('revised_at'))
 259
 260     rev_ctx = []
 261
 262     for i, revision in enumerate(revisions):
 263         rev_ctx.append(dict(inst=revision, html=REVISION_TEMPLATE.render(template.Context({
 264                 'title': revision.title,
 265                 'html': revision.html,
 266                 'tags': revision.tagname_list(),
 267         }))))
 268
 269         if i > 0:
 270             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
 271         else:
 272             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
 273
 274         if not (revision.summary):
 275             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
 276         else:
 277             rev_ctx[i]['summary'] = revision.summary
 278
 279     return render_to_response('revisions_question.html', {
 280                               'post': post,
 281                               'revisions': rev_ctx,
 282                               }, context_instance=RequestContext(request))
 283
 284
 285