]> git.openstreetmap.org Git - osqa.git/blob - forum/views/readers.py
Jira OSQA-528, display the tag name in the meta description on the tag view, extendin...
[osqa.git] / forum / views / readers.py
1 # encoding:utf-8
2 import datetime
3 import logging
4 from urllib import unquote
5 from django.shortcuts import render_to_response, get_object_or_404
6 from django.http import HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
7 from django.core.paginator import Paginator, EmptyPage, InvalidPage
8 from django.template import RequestContext
9 from django import template
10 from django.utils.html import *
11 from django.db.models import Q, Count
12 from django.utils.translation import ugettext as _
13 from django.core.urlresolvers import reverse
14 from django.template.defaultfilters import slugify
15 from django.utils.safestring import mark_safe
16
17 from forum import settings as django_settings
18 from forum.utils.html import hyperlink
19 from forum.utils.diff import textDiff as htmldiff
20 from forum.utils import pagination
21 from forum.forms import *
22 from forum.models import *
23 from forum.actions import QuestionViewAction
24 from forum.http_responses import HttpResponseUnauthorized
25 from forum.feed import RssQuestionFeed, RssAnswerFeed
26 from forum.utils.pagination import generate_uri
27
28 import decorators
29
30 class HottestQuestionsSort(pagination.SortBase):
31     def apply(self, questions):
32         return questions.annotate(new_child_count=Count('all_children')).filter(
33                 all_children__added_at__gt=datetime.datetime.now() - datetime.timedelta(days=1)).order_by('-new_child_count')
34
35
36 class QuestionListPaginatorContext(pagination.PaginatorContext):
37     def __init__(self, id='QUESTIONS_LIST', prefix='', pagesizes=(15, 30, 50), default_pagesize=30):
38         super (QuestionListPaginatorContext, self).__init__(id, sort_methods=(
39             (_('active'), pagination.SimpleSort(_('active'), '-last_activity_at', _("Most <strong>recently updated</strong> questions"))),
40             (_('newest'), pagination.SimpleSort(_('newest'), '-added_at', _("most <strong>recently asked</strong> questions"))),
41             (_('hottest'), HottestQuestionsSort(_('hottest'), _("most <strong>active</strong> questions in the last 24 hours</strong>"))),
42             (_('mostvoted'), pagination.SimpleSort(_('most voted'), '-score', _("most <strong>voted</strong> questions"))),
43         ), pagesizes=pagesizes, default_pagesize=default_pagesize, prefix=prefix)
44
45 class AnswerSort(pagination.SimpleSort):
46     def apply(self, answers):
47         if not settings.DISABLE_ACCEPTING_FEATURE:
48             return answers.order_by(*(['-marked'] + list(self._get_order_by())))
49         else:
50             return super(AnswerSort, self).apply(answers)
51
52 class AnswerPaginatorContext(pagination.PaginatorContext):
53     def __init__(self, id='ANSWER_LIST', prefix='', default_pagesize=10):
54         super (AnswerPaginatorContext, self).__init__(id, sort_methods=(
55             (_('oldest'), AnswerSort(_('oldest answers'), 'added_at', _("oldest answers will be shown first"))),
56             (_('newest'), AnswerSort(_('newest answers'), '-added_at', _("newest answers will be shown first"))),
57             (_('votes'), AnswerSort(_('popular answers'), ('-score', 'added_at'), _("most voted answers will be shown first"))),
58         ), default_sort=_('votes'), pagesizes=(5, 10, 20), default_pagesize=default_pagesize, prefix=prefix)
59
60 class TagPaginatorContext(pagination.PaginatorContext):
61     def __init__(self):
62         super (TagPaginatorContext, self).__init__('TAG_LIST', sort_methods=(
63             (_('name'), pagination.SimpleSort(_('by name'), 'name', _("sorted alphabetically"))),
64             (_('used'), pagination.SimpleSort(_('by popularity'), '-used_count', _("sorted by frequency of tag use"))),
65         ), default_sort=_('used'), pagesizes=(30, 60, 120))
66     
67
68 def feed(request):
69     return RssQuestionFeed(
70                 request,
71                 Question.objects.filter_state(deleted=False).order_by('-last_activity_at'),
72                 settings.APP_TITLE + _(' - ')+ _('latest questions'),
73                 settings.APP_DESCRIPTION)(request)
74
75 @decorators.render('index.html')
76 def index(request):
77     paginator_context = QuestionListPaginatorContext()
78     paginator_context.base_path = reverse('questions')
79     return question_list(request,
80                          Question.objects.all(),
81                          base_path=reverse('questions'),
82                          feed_url=reverse('latest_questions_feed'),
83                          paginator_context=paginator_context)
84
85 @decorators.render('questions.html', 'unanswered', _('unanswered'), weight=400)
86 def unanswered(request):
87     return question_list(request,
88                          Question.objects.exclude(id__in=Question.objects.filter(children__marked=True).distinct()).exclude(marked=True),
89                          _('open questions without an accepted answer'),
90                          None,
91                          _("Unanswered Questions"))
92
93 @decorators.render('questions.html', 'questions', _('questions'), weight=0)
94 def questions(request):
95     return question_list(request, Question.objects.all(), _('questions'))
96
97 @decorators.render('questions.html')
98 def tag(request, tag):
99     try:
100         tag = Tag.active.get(name=unquote(tag))
101     except Tag.DoesNotExist:
102         raise Http404
103
104     # Getting the questions QuerySet
105     questions = Question.objects.filter(tags__id=tag.id)
106
107     if request.method == "GET":
108         user = request.GET.get('user', None)
109
110         if user is not None:
111             try:
112                 questions = questions.filter(author=User.objects.get(username=user))
113             except User.DoesNotExist:
114                 raise Http404
115
116     # The extra tag context we need to pass
117     tag_context = {
118         'tag' : tag,
119     }
120
121     # The context returned by the question_list function, contains info about the questions
122     question_context = question_list(request,
123                          questions,
124                          mark_safe(_(u'questions tagged <span class="tag">%(tag)s</span>') % {'tag': tag}),
125                          None,
126                          mark_safe(_(u'Questions Tagged With %(tag)s') % {'tag': tag}),
127                          False)
128
129     # Create the combined context
130     context = dict(question_context, **tag_context)
131
132     return context
133
134 @decorators.render('questions.html', 'questions', tabbed=False)
135 def user_questions(request, mode, user, slug):
136     user = get_object_or_404(User, id=user)
137
138     if mode == _('asked-by'):
139         questions = Question.objects.filter(author=user)
140         description = _("Questions asked by %s")
141     elif mode == _('answered-by'):
142         questions = Question.objects.filter(children__author=user, children__node_type='answer').distinct()
143         description = _("Questions answered by %s")
144     elif mode == _('subscribed-by'):
145         if not (request.user.is_superuser or request.user == user):
146             return HttpResponseUnauthorized(request)
147         questions = user.subscriptions
148
149         if request.user == user:
150             description = _("Questions you subscribed %s")
151         else:
152             description = _("Questions subscribed by %s")
153     else:
154         raise Http404
155
156
157     return question_list(request, questions,
158                          mark_safe(description % hyperlink(user.get_profile_url(), user.username)),
159                          page_title=description % user.username)
160
161 def question_list(request, initial,
162                   list_description=_('questions'),
163                   base_path=None,
164                   page_title=_("All Questions"),
165                   allowIgnoreTags=True,
166                   feed_url=None,
167                   paginator_context=None,
168                   feed_sort=('-added_at',),
169                   feed_req_params_exclude=(_('page'), _('pagesize'), _('sort'))):
170
171     questions = initial.filter_state(deleted=False)
172
173     if request.user.is_authenticated() and allowIgnoreTags:
174         questions = questions.filter(~Q(tags__id__in = request.user.marked_tags.filter(user_selections__reason = 'bad')))
175
176     if page_title is None:
177         page_title = _("Questions")
178
179     if request.GET.get('type', None) == 'rss':
180         if feed_sort:
181             questions = questions.order_by(*feed_sort)
182         return RssQuestionFeed(request, questions, page_title, list_description)(request)
183
184     keywords =  ""
185     if request.GET.get("q"):
186         keywords = request.GET.get("q").strip()
187
188     #answer_count = Answer.objects.filter_state(deleted=False).filter(parent__in=questions).count()
189     #answer_description = _("answers")
190
191     if not feed_url:
192         req_params = generate_uri(request.GET, feed_req_params_exclude)
193
194         if req_params:
195             req_params = '&' + req_params
196
197         feed_url = request.path + "?type=rss" + req_params
198
199     context = {
200         'questions' : questions.distinct(),
201         'questions_count' : questions.count(),
202         'keywords' : keywords,
203         'list_description': list_description,
204         'base_path' : base_path,
205         'page_title' : page_title,
206         'tab' : 'questions',
207         'feed_url': feed_url,
208     }
209
210     return pagination.paginated(request,
211                                ('questions', paginator_context or QuestionListPaginatorContext()), context)
212
213
214 def search(request):
215     if request.method == "GET" and "q" in request.GET:
216         keywords = request.GET.get("q")
217         search_type = request.GET.get("t")
218
219         if not keywords:
220             return HttpResponseRedirect(reverse(index))
221         if search_type == 'tag':
222             return HttpResponseRedirect(reverse('tags') + '?q=%s' % urlquote(keywords.strip()))
223         elif search_type == "user":
224             return HttpResponseRedirect(reverse('users') + '?q=%s' % urlquote(keywords.strip()))
225         else:
226             return question_search(request, keywords)
227     else:
228         return render_to_response("search.html", context_instance=RequestContext(request))
229
230 @decorators.render('questions.html')
231 def question_search(request, keywords):
232     rank_feed = False
233     can_rank, initial = Question.objects.search(keywords)
234
235     if can_rank:
236         sort_order = None
237
238         if isinstance(can_rank, basestring):
239             sort_order = can_rank
240             rank_feed = True
241
242         paginator_context = QuestionListPaginatorContext()
243         paginator_context.sort_methods[_('ranking')] = pagination.SimpleSort(_('relevance'), sort_order, _("most relevant questions"))
244         paginator_context.force_sort = _('ranking')
245     else:
246         paginator_context = None
247
248     feed_url = mark_safe(escape(request.path + "?type=rss&q=" + keywords))
249
250     return question_list(request, initial,
251                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
252                          None,
253                          _("questions matching '%(keywords)s'") % {'keywords': keywords},
254                          paginator_context=paginator_context,
255                          feed_url=feed_url, feed_sort=rank_feed and (can_rank,) or '-added_at')
256
257
258 @decorators.render('tags.html', 'tags', _('tags'), weight=100)
259 def tags(request):
260     stag = ""
261     tags = Tag.active.all()
262
263     if request.method == "GET":
264         stag = request.GET.get("q", "").strip()
265         if stag:
266             tags = tags.filter(name__icontains=stag)
267
268     return pagination.paginated(request, ('tags', TagPaginatorContext()), {
269         "tags" : tags,
270         "stag" : stag,
271         "keywords" : stag
272     })
273
274 def update_question_view_times(request, question):
275     last_seen_in_question = request.session.get('last_seen_in_question', {})
276
277     last_seen = last_seen_in_question.get(question.id, None)
278
279     if (not last_seen) or (last_seen < question.last_activity_at):
280         QuestionViewAction(question, request.user, ip=request.META['REMOTE_ADDR']).save()
281         last_seen_in_question[question.id] = datetime.datetime.now()
282         request.session['last_seen_in_question'] = last_seen_in_question
283
284 def match_question_slug(id, slug):
285     slug_words = slug.split('-')
286     qs = Question.objects.filter(title__istartswith=slug_words[0])
287
288     for q in qs:
289         if slug == urlquote(slugify(q.title)):
290             return q
291
292     return None
293
294 def answer_redirect(request, answer):
295     pc = AnswerPaginatorContext()
296
297     sort = pc.sort(request)
298
299     if sort == _('oldest'):
300         filter = Q(added_at__lt=answer.added_at)
301     elif sort == _('newest'):
302         filter = Q(added_at__gt=answer.added_at)
303     elif sort == _('votes'):
304         filter = Q(score__gt=answer.score) | Q(score=answer.score, added_at__lt=answer.added_at)
305     else:
306         raise Http404()
307
308     count = answer.question.answers.filter(Q(marked=True) | filter).exclude(state_string="(deleted)").count()
309     pagesize = pc.pagesize(request)
310
311     page = count / pagesize
312     
313     if count % pagesize:
314         page += 1
315         
316     if page == 0:
317         page = 1
318
319     return HttpResponsePermanentRedirect("%s?%s=%s#%s" % (
320         answer.question.get_absolute_url(), _('page'), page, answer.id))
321
322 @decorators.render("question.html", 'questions')
323 def question(request, id, slug='', answer=None):
324     try:
325         question = Question.objects.get(id=id)
326     except:
327         if slug:
328             question = match_question_slug(id, slug)
329             if question is not None:
330                 return HttpResponseRedirect(question.get_absolute_url())
331
332         raise Http404()
333
334     if question.nis.deleted and not request.user.can_view_deleted_post(question):
335         raise Http404
336
337     if request.GET.get('type', None) == 'rss':
338         return RssAnswerFeed(request, question, include_comments=request.GET.get('comments', None) == 'yes')(request)
339
340     if answer:
341         answer = get_object_or_404(Answer, id=answer)
342
343         if (question.nis.deleted and not request.user.can_view_deleted_post(question)) or answer.question != question:
344             raise Http404
345
346         if answer.marked:
347             return HttpResponsePermanentRedirect(question.get_absolute_url())
348
349         return answer_redirect(request, answer)
350
351     if settings.FORCE_SINGLE_URL and (slug != slugify(question.title)):
352         return HttpResponsePermanentRedirect(question.get_absolute_url())
353
354     if request.POST:
355         answer_form = AnswerForm(request.POST, user=request.user)
356     else:
357         answer_form = AnswerForm(user=request.user)
358
359     answers = request.user.get_visible_answers(question)
360
361     update_question_view_times(request, question)
362
363     if request.user.is_authenticated():
364         try:
365             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
366         except:
367             subscription = False
368     else:
369         subscription = False
370
371     return pagination.paginated(request, ('answers', AnswerPaginatorContext()), {
372     "question" : question,
373     "answer" : answer_form,
374     "answers" : answers,
375     "similar_questions" : question.get_related_questions(),
376     "subscription": subscription,
377     "embed_youtube_videos" : settings.EMBED_YOUTUBE_VIDEOS,
378     })
379
380
381 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
382
383 def revisions(request, id):
384     post = get_object_or_404(Node, id=id).leaf
385     revisions = list(post.revisions.order_by('revised_at'))
386     rev_ctx = []
387
388     for i, revision in enumerate(revisions):
389         rev_ctx.append(dict(inst=revision, html=template.loader.get_template('node/revision.html').render(template.Context({
390         'title': revision.title,
391         'html': revision.html,
392         'tags': revision.tagname_list(),
393         }))))
394
395         if i > 0:
396             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
397         else:
398             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
399
400         if not (revision.summary):
401             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
402         else:
403             rev_ctx[i]['summary'] = revision.summary
404
405     rev_ctx.reverse()
406
407     return render_to_response('revisions.html', {
408     'post': post,
409     'revisions': rev_ctx,
410     }, context_instance=RequestContext(request))
411
412
413