BeatLyrics/BeatLyrics.Tool/Utils/Formatter.cs

using System;
using System.IO;
using System.Linq;

namespace BeatLyrics.Tool.Utils
{
    internal static class Formatter
    {
        public static string FormatToTotalMinuteAndSeconds(this TimeSpan d) => $"{Math.Floor(d.TotalMinutes):00}:{d.Seconds:00}";

        public static string FormatToTotalMinuteAndSecondsAndMs(this TimeSpan d) => $"{Math.Floor(d.TotalMinutes):00}:{d.Seconds:00}.{d.Milliseconds:000}";

        public static string ToSafeFileName(this string str)
        {
            var inv = Path.GetInvalidFileNameChars();
            var chars = str.ToCharArray();
            
            for (var i = 0; i < chars.Length; i++)
            {
                if (inv.Contains(chars[i])) chars[i] = '_';
            }

            return new string(chars);
        }
    }
}