OSMServer/Server/ConsoleWriter.cs

using System.Globalization;
using System.Text;

namespace Server;

public class ConsoleWriter : TextWriter
{
    public override Encoding Encoding { get; }
    private TextWriter stdOut { get; }
    private DateTime execStart { get; }
    public event EventHandler<ConsoleWriterEventArgs>? OnWrite;
    public event EventHandler<ConsoleWriterEventArgs>? OnWriteLine; 

    public ConsoleWriter()
    {
        stdOut = Console.Out;
        execStart = DateTime.Now;
        Encoding = Encoding.UTF8;
    }

    public ConsoleWriter(DateTime execStart)
    {
        stdOut = Console.Out;
        this.execStart = execStart;
        Encoding = Encoding.UTF8;
    }

    public override void WriteLine(string? text)
    {
        DateTime now = DateTime.Now;
        string dateTimeString = $"[{now.ToUniversalTime():u} ({Math.Floor((now - execStart).TotalMilliseconds):###,###,###})]";
        if(text is not null)
            OnWriteLine?.Invoke(this, new ConsoleWriterEventArgs($"{dateTimeString} {text}"));
        stdOut.WriteLine($"{dateTimeString} {text}");
    }

    public override void Write(string? text)
    {
        if(text is not null)
            OnWrite?.Invoke(this, new ConsoleWriterEventArgs(text));
        stdOut.Write(text);
    }
}

public class ConsoleWriterEventArgs : EventArgs
{
    public string text { get; }
    public ConsoleWriterEventArgs(string text)
    {
        this.text = text;
    }
}