BetterLyrics/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Converter/MillisecondsToFormattedTimeConverter.cs

using Microsoft.UI.Xaml.Data;
using System;

namespace BetterLyrics.WinUI3.Converter
{
    public partial class MillisecondsToFormattedTimeConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, string language)
        {
            double? milliseconds = null;

            if (value is int iVal) milliseconds = iVal;
            else if (value is double dVal) milliseconds = dVal;
            else if (value is long lVal) milliseconds = lVal;

            if (milliseconds.HasValue)
            {
                var ts = TimeSpan.FromMilliseconds(milliseconds.Value);

                string? format = parameter?.ToString();

                if (string.IsNullOrEmpty(format))
                {
                    format = @"mm\:ss\.fff";
                }

                try
                {
                    return ts.ToString(format);
                }
                catch (FormatException)
                {
                    return ts.ToString();
                }
            }

            return value?.ToString() ?? "";
        }

        public object ConvertBack(object value, Type targetType, object parameter, string language)
        {
            throw new NotImplementedException();
        }
    }
}