update

[prawokultury.git] / questions / views.py

diff --git a/questions/views.py b/questions/views.py
index 1c918c8..25ec438 100644 (file)
--- a/questions/views.py
+++ b/questions/views.py
@@ -1,6 +1,14 @@
+# -*- coding: utf-8 -*-
+# This file is part of PrawoKultury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
 from django.core.urlresolvers import reverse_lazy
+from django.db import models
+from django.shortcuts import get_object_or_404
+from django.views.generic import ListView
 from django.views.generic.edit import FormView
 from .forms import QuestionForm
+from .models import Question, Tag, TagCategory
 
 
 class QuestionFormView(FormView):
@@ -11,3 +19,64 @@ class QuestionFormView(FormView):
     def form_valid(self, form):
         form.save()
         return super(QuestionFormView, self).form_valid(form)
+
+
+class QuestionListView(ListView):
+    def get(self, request, *args, **kwargs):
+        self.tag = None
+        if 'tag' in request.GET:
+            try:
+                tag = Tag.objects.get(slug=request.GET['tag'])
+                assert Question.objects.filter(tags=self.tag).exists()
+            except (Tag.DoesNotExist, AssertionError):
+                pass
+            else:
+                self.tag = tag
+        return super(QuestionListView, self).get(request, *args, **kwargs)
+
+    def get_queryset(self):
+        qs = Question.objects.filter(published=True
+                ).order_by('-published_at')
+        if self.tag:
+            qs = qs.filter(tags=self.tag)
+            self.tag.click_count += 1
+            self.tag.save()
+        return qs
+
+    def get_context_data(self, *args, **kwargs):
+        def get_cloud_size(clicks, relate_to):
+            return '%.2f' % (0.7 + (float(clicks) / relate_to if relate_to != 0 else 0))
+        
+        context = super(QuestionListView, self).get_context_data(*args, **kwargs)
+        context['tag'] = self.tag
+        context['tag_categories'] = TagCategory.objects.all().annotate(click_count = models.Sum('tags__click_count'))
+        context['tag_lists'] = dict()
+        
+        annotated_categories = dict()
+        all_tags_click_count = Tag.objects.all().aggregate(models.Sum('click_count'))['click_count__sum']
+        for category in context['tag_categories']:
+            annotated_categories[category.id] = category
+            category.cloud_size =  get_cloud_size(category.click_count, all_tags_click_count)
+
+        # This wouldn't happen if we were using taggit without generic relations.
+        tags = Tag.objects.raw("""
+            SELECT t.category_id, t.click_count, t.id, t.name, t.slug, count(t.id) AS c
+            FROM questions_tag t
+            LEFT JOIN questions_tagcategory c ON c.id=t.category_id
+            LEFT JOIN questions_tagitem i ON i.tag_id=t.id
+            LEFT JOIN questions_question q ON q.id=i.object_id
+            WHERE q.published
+            GROUP BY t.category_id, t.click_count, t.id, t.name, t.slug, c.slug
+            ORDER BY c.slug, c DESC, t.slug
+            """)
+        uncategorized_tags_click_count = Tag.objects.filter(category=None).aggregate(models.Sum('click_count'))['click_count__sum']
+        for tag in tags:
+            if tag.category:
+                category_click_count = annotated_categories[tag.category.id].click_count
+            else:
+                category_click_count = uncategorized_tags_click_count
+            tag.cloud_size = get_cloud_size(tag.click_count, category_click_count)
+            context['tag_lists'].setdefault(tag.category.id if tag.category else 0, []).append(tag)
+        context['has_uncategorized_tags'] = 0 in context['tag_lists']
+
+        return context