update bump logic

contrib/frontends/django/nntpchan/nntpchan/frontend/models.py

@@ -97,6 +97,6 @@ class Post(models.Model):
             frag = util.hashid(self.msgid)
             return reverse('frontend:thread', args=[op]) + '#{}'.format(frag)
 
-    def bump(self):
+    def bump(self, last):
         if self.is_op():
-            self.last_bumped = util.time_int(datetime.now())
+            self.last_bumped = last

contrib/frontends/django/nntpchan/nntpchan/views.py

@@ -127,7 +127,7 @@ def webhook(request):
             'subject': 'OP Not Found',
             'newsgroup': group}, msgid=opmsgid)
         if bump:
-            op.bump()
+            op.bump(post.posted)
         op.save()
             
     except Exception as ex: