Handling special case with zero clicks

[prawokultury.git] / questions / views.py

diff --git a/questions/views.py b/questions/views.py
index 1c918c8..43b812b 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.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 django.views.generic.edit import FormView
 from .forms import QuestionForm

+from .models import Question, Tag, TagCategory

 
 
 class QuestionFormView(FormView):
 
 
 class QuestionFormView(FormView):


@@ -11,3 +19,44 @@ class QuestionFormView(FormView):
     def form_valid(self, form):
         form.save()
         return super(QuestionFormView, self).form_valid(form)
     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:
+                self.tag = Tag.objects.filter(items__question__published=True, slug=request.GET['tag'])[0]
+            except IndexError:
+                pass
+        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):
+        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()
+        
+        tags = Tag.objects.filter(items__question__published=True
+            ).annotate(c=models.Count('items__tag')).order_by('category__slug', '-c', 'slug')
+        all_tag_clicks_count = Tag.objects.all().aggregate(models.Sum('click_count'))['click_count__sum']
+        annotated_categories = dict()
+        minimum_factor = 0.7
+        for category in context['tag_categories']:
+            annotated_categories[category.id] = category
+            category.factor =  '%.2f' % (minimum_factor + ((float(category.click_count) / all_tag_clicks_count) if all_tag_clicks_count else 0))
+        for tag in tags:
+            if tag.category:
+                category = annotated_categories[tag.category.id]
+                tag.factor = '%.2f' % (minimum_factor + ((float(tag.click_count) / category.click_count) if category.click_count else 0))
+            context['tag_lists'].setdefault(tag.category.id if tag.category else 0, []).append(tag)
+        return context