add frags

dataBase.go

@@ -164,6 +164,30 @@ func (db *dbLayer) getPlayerByName(ctx context.Context, name string) (*Player, e
 	return nil, nil
 }
 
+func (db *dbLayer) getKillsByOPlayerID(ctx context.Context, playerID string) (int, error) {
+	query := "SELECT SUM(count) FROM killings WHERE player_id = $1 GROUP BY player_id"
+
+	rows, err := db.db.QueryContext(ctx, query, playerID)
+	if err != nil {
+		return 0, errors.Wrapf(err, "Failed to run db query [%s]", query)
+	}
+
+	defer rows.Close()
+
+	if rows.Next() {
+		var killsNum int
+
+		err = rows.Scan(&killsNum)
+		if err != nil {
+			return 0, errors.Wrap(err, "Failed to fetch data base")
+		}
+
+		return killsNum, nil
+	}
+
+	return 0, nil
+}
+
 func (db *dbLayer) createPlayer(ctx context.Context, name string, lastOnline time.Time) (*Player, error) {
 	id := uuid()