/// <summary> /// /// </summary> /// <returns></returns> private static string GetTime(string expr, bool roundUp) { if (string.IsNullOrEmpty(expr)) { return(string.Empty); } if (DateTimeMathParser.IsDateTime(expr, out DateTime date)) { return(ToUnixTimeMilliseconds(date)); } if (expr == DateTimeMathParser.NOW) { return(NOW); } var parts = Regex.Split(expr, @"^now-(\d+)([dhms])$"); if (parts?.Length > 2) { int.TryParse(parts [1], out int amount); var unit = parts [2]; return($"{NOW} - {amount}{unit}"); } var res = DateTimeMathParser.ToDateTime(expr, roundUp); return(res.HasValue ? ToUnixTimeMilliseconds(res.Value) : string.Empty); }