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Redirect to the correct question if there is no match in the id but there is one...
[osqa.git] / 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='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, orderby):
124         return Question.objects.filter(Q(title__icontains=keywords) | Q(html__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(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(id=id)
214     except:
215         question = match_question_slug(slug)
216         if question is not None:
217             return HttpResponseRedirect(question.get_absolute_url())
218         else:
219             raise Http404()
220
221     if slug != urlquote(slugify(question.title)):
222         match = match_question_slug(slug)
223         if match is not None:
224             return HttpResponseRedirect(match.get_absolute_url())    
225
226         return HttpResponseRedirect(question.get_absolute_url())
227
228     page = int(request.GET.get('page', 1))
229     view_id, order_by = get_answer_sort_order(request)
230
231     if question.deleted and not request.user.can_view_deleted_post(question):
232         raise Http404
233
234     answer_form = AnswerForm(question)
235     answers = request.user.get_visible_answers(question)
236
237     if answers is not None:
238         answers = [a for a in answers.order_by("-accepted", order_by)
239                    if not a.deleted or a.author == request.user]
240
241     objects_list = Paginator(answers, ANSWERS_PAGE_SIZE)
242     page_objects = objects_list.page(page)
243
244     update_question_view_times(request, question)
245
246     if request.user.is_authenticated():
247         try:
248             subscription = QuestionSubscription.objects.get(question=question, user=request.user)
249         except:
250             subscription = False
251     else:
252         subscription = False
253
254     return render_to_response('question.html', {
255         "question" : question,
256         "answer" : answer_form,
257         "answers" : page_objects.object_list,
258         "tags" : question.tags.all(),
259         "tab_id" : view_id,
260         "similar_questions" : question.get_related_questions(),
261         "subscription": subscription,
262         "context" : {
263             'is_paginated' : True,
264             'pages': objects_list.num_pages,
265             'page': page,
266             'has_previous': page_objects.has_previous(),
267             'has_next': page_objects.has_next(),
268             'previous': page_objects.previous_page_number(),
269             'next': page_objects.next_page_number(),
270             'base_url' : request.path + '?sort=%s&' % view_id,
271             'extend_url' : "#sort-top"
272         }
273         }, context_instance=RequestContext(request))
274
275
276 REVISION_TEMPLATE = template.loader.get_template('node/revision.html')
277
278 def revisions(request, id):
279     post = get_object_or_404(Node, id=id).leaf
280     revisions = list(post.revisions.order_by('revised_at'))
281
282     rev_ctx = []
283
284     for i, revision in enumerate(revisions):
285         rev_ctx.append(dict(inst=revision, html=REVISION_TEMPLATE.render(template.Context({
286                 'title': revision.title,
287                 'html': revision.html,
288                 'tags': revision.tagname_list(),
289         }))))
290
291         if i > 0:
292             rev_ctx[i]['diff'] = mark_safe(htmldiff(rev_ctx[i-1]['html'], rev_ctx[i]['html']))
293         else:
294             rev_ctx[i]['diff'] = mark_safe(rev_ctx[i]['html'])
295
296         if not (revision.summary):
297             rev_ctx[i]['summary'] = _('Revision n. %(rev_number)d') % {'rev_number': revision.revision}
298         else:
299             rev_ctx[i]['summary'] = revision.summary
300             
301     return render_to_response('revisions_question.html', {
302                               'post': post,
303                               'revisions': rev_ctx,
304                               }, context_instance=RequestContext(request))
305
306
307