Add notification

judge/views/notification.py

@@ -0,0 +1,52 @@
+from django.contrib.auth.decorators import login_required
+from django.views.generic import ListView
+from django.utils.translation import ugettext as _
+from django.utils.timezone import now
+from django.db.models import BooleanField, Value
+
+from judge.utils.cachedict import CacheDict
+from judge.models import Profile, Comment, Notification
+
+__all__ = ['NotificationList']
+
+class NotificationList(ListView):
+    model = Notification
+    context_object_name = 'notifications'
+    template_name = 'notification/list.html'
+    
+    def get_queryset(self):
+        self.unseen_cnt = self.request.profile.count_unseen_notifications
+        
+        query = {
+            'owner': self.request.profile,
+            'comment__hidden': False,
+        }
+        self.queryset = Notification.objects.filter(**query)\
+                           .order_by('-time')[:100] \
+                           .annotate(seen=Value(True, output_field=BooleanField()))
+        
+        # Mark the several first unseen
+        for cnt, q in enumerate(self.queryset):
+            if (cnt < self.unseen_cnt):
+                q.seen = False
+            else:
+                break
+        
+        return self.queryset
+    
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context['unseen_count'] = self.unseen_cnt
+        context['title'] = _('Notifications (%d unseen)' % context['unseen_count'])
+        context['has_notifications'] = self.queryset.exists()
+        context['page_titles'] = CacheDict(lambda page: Comment.get_page_title(page))
+        return context
+
+    def get(self, request, *args, **kwargs):
+        ret = super().get(request, *args, **kwargs)
+        
+        # update after rendering
+        Notification.objects.filter(owner=self.request.profile).update(read=True)
+        
+        return ret
+