stats for dupes

main.go

@@ -182,10 +182,16 @@ func (that *ProjectBackfeedManager) Do() {
 				sAddItems = append(sAddItems, items[i])
 			}
 		}
-		if len(sAddItems) == 0 {
-			continue
+		dupes := wrapped - len(sAddItems)
+		if len(sAddItems) != 0 {
+			err := that.ProjectRedis.SAdd(context.Background(), fmt.Sprintf("%s:todo:backfeed", that.Name), sAddItems...).Err()
+			if err != nil {
+				log.Printf("failed to sadd items for %s: %s", that.Name, err)
+			}
+		}
+		if dupes > 0 {
+			that.BackfeedRedis.HIncrBy(context.Background(), ":", that.Name, int64(dupes))
 		}
-		that.ProjectRedis.SAdd(context.Background(), fmt.Sprintf("%s:todo:backfeed", that.Name), sAddItems...)
 	}
 }