DataTransfer/DataTransfer.Client/Services/DisplayFormat.cs

using System.Globalization;

namespace DataTransfer.Client.Services;

public static class DisplayFormat
{
    public static string Bytes(long bytes) => bytes switch
    {
        >= 1024L * 1024 * 1024 => string.Create(CultureInfo.InvariantCulture, $"{bytes / 1024d / 1024d / 1024d:0.#} GB"),
        >= 1024 * 1024 => string.Create(CultureInfo.InvariantCulture, $"{bytes / 1024d / 1024d:0.0} MB"),
        >= 1024 => string.Create(CultureInfo.InvariantCulture, $"{bytes / 1024d:0.0} KB"),
        _ => $"{bytes} B"
    };

    public static string Duration(TimeSpan duration) =>
        duration switch
        {
            { TotalHours: >= 1, Minutes: 0, Seconds: 0 } => string.Create(CultureInfo.InvariantCulture, $"{duration.TotalHours:0} h"),
            { TotalMinutes: >= 1, Seconds: 0 } => string.Create(CultureInfo.InvariantCulture, $"{duration.TotalMinutes:0} min"),
            _ => string.Create(CultureInfo.InvariantCulture, $"{duration.TotalSeconds:0} s")
        };

    public static string Countdown(TimeSpan remaining)
    {
        if (remaining < TimeSpan.Zero)
        {
            remaining = TimeSpan.Zero;
        }

        return remaining.ToString(remaining.TotalHours >= 1 ? @"h\:mm\:ss" : @"mm\:ss", CultureInfo.InvariantCulture);
    }
}