Connected.Components/Extensions/TimeSpanExtensions.cs

// Copyright (c) MudBlazor

using System;

// ReSharper disable once CheckNamespace
internal static class TimeSpanExtensions
{
    public static string ToIsoString(this TimeSpan self, bool seconds = false, bool ms = false)
    {
        if (!seconds)
            return $"{self.Hours:D2}:{self.Minutes:D2}";
        if (!ms)
            return $"{self.Hours:D2}:{self.Minutes:D2}-{self.Seconds:D2}";
        return $"{self.Hours:D2}:{self.Minutes:D2}-{self.Seconds:D2},{self.Milliseconds}";
    }

    public static string ToIsoString(this TimeSpan? self, bool seconds = false, bool ms = false)
    {
        return self?.ToIsoString(seconds, ms);
    }

    public static int ToAmPmHour(this TimeSpan time)
    {
        var h = time.Hours % 12;
        if (h == 0)
            h = 12;
        return h;
    }
}