--- a/qrurls/models.py	Thu Aug 22 02:12:13 2013 +0300
+++ b/qrurls/models.py	Thu Aug 22 02:44:51 2013 +0300
@@ -106,6 +106,35 @@
         except IndexError :
             return None
 
+    @property
+    def publishing_timetz (self) :
+        """publishing_time, with tzinfo on the correct timezone."""
+        return self.publishing_time.replace(tzinfo=timezone.get_current_timezone())
+    
+    # XXX: hardcoded for now
+    publishing_offset = datetime.timedelta(days=1)
+
+    def publishing_schedule (self) :
+        """Calculate initial URLItem.published values for feed."""
+
+        # following the last item in the queue
+        item = self.last_item()
+
+        if item and item.published > self.now():
+            # starting from the following day
+            date = item.published.date() + self.publishing_offset
+        else :
+            # defaults to today
+            date = self.now().date()
+        
+        return date, self.publishing_timetz, self.publishing_offset
+    
+    @classmethod
+    def apply_publishing_schedule (self, date, time, offset, count) :
+        """Yield publishing times off given date/time to offset * count."""
+        for index in xrange(0, count) :
+            yield datetime.datetime.combine(date + offset * index, time)
+
     def __unicode__ (self) :
         return self.shorturl