1 files changed, 21 insertions, 1 deletions

diff --git a/hyperkitty/lib/__init__.py b/hyperkitty/lib/__init__.py
index a25dcd7..9bcded3 100644
--- a/hyperkitty/lib/__init__.py
+++ b/hyperkitty/lib/__init__.py
@@ -26,10 +26,11 @@ import datetime
 from django.core.exceptions import SuspiciousOperation
 from django.core.mail import EmailMessage
 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
+from django.utils.timezone import utc
 from mailmanclient import MailmanConnectionError
 
 from hyperkitty.lib import mailman
-from hyperkitty.models import ThreadCategory
+from hyperkitty.models import ThreadCategory, LastView
 from hyperkitty.views.forms import CategoryForm
 
 
@@ -214,3 +215,22 @@ def get_category_widget(request=None, current_category=None):
         except ThreadCategory.DoesNotExist:
             category = None
     return category, category_form
+
+
+def is_thread_unread(request, mlist_name, thread):
+    """Returns True or False if the thread is unread or not."""
+    unread = False
+    if request.user.is_authenticated():
+        try:
+            last_view_obj = LastView.objects.get(
+                    list_address=mlist_name,
+                    threadid=thread.thread_id,
+                    user=request.user)
+        except LastView.DoesNotExist:
+            unread = True
+        else:
+            if thread.date_active.replace(tzinfo=utc) \
+                    > last_view_obj.view_date:
+                unread = True
+    return unread
+