command.cs

using System.Text.RegularExpressions;

internal class CommandLineOptions
{
    public int Port { get; private set; } = -1;
    public string? FooterHtml { get; private set; }
    public bool ShouldExit { get; private set; }

    public static CommandLineOptions Parse(string[] args, string version)
    {
        var opt = new CommandLineOptions();
        string? rawFooter = null;

        for (int i = 0; i < args.Length; i++)
        {
            switch (args[i])
            {
                case "-p":
                    if (i + 1 < args.Length && int.TryParse(args[i + 1], out int p))
                    {
                        opt.Port = p;
                        i++;
                    }
                    break;

                case "-c":
                    if (i + 1 < args.Length)
                    {
                        rawFooter = args[i + 1];
                        i++;
                    }
                    break;

                case "-h":
                case "--help":
                    ShowHelp(version);
                    opt.ShouldExit = true;
                    return opt;
            }
        }

        if (opt.Port <= 0)
        {
            opt.Port = 5000;
            Console.WriteLine();
            Console.Write("no set port, or have error, so we will try using 5000 port");
            Console.WriteLine();
        }

        if (opt.Port > 65535)
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("error: port must 1~65535, and you can using -p to set port.");
            Console.WriteLine("if not set port, we will try using 5000 port");
            Console.ResetColor();
            opt.ShouldExit = true;
            return opt;
        }

        Show(version, opt.Port);

        if (!string.IsNullOrWhiteSpace(rawFooter))
        {
            Console.WriteLine();
            Console.WriteLine("you using -c, so we will add this at foter text");
            Console.WriteLine(rawFooter);
            Console.WriteLine();


            if (Regex.IsMatch(rawFooter, @"[<>&""']"))
            {
                opt.FooterHtml = rawFooter;
            }
            else
            {   
                Console.WriteLine("tip£ºwe not find something like  <>&\"' in your parameters(-c). So we will add <p> </p> for you.");
                Console.WriteLine();
                opt.FooterHtml = "<p>" + rawFooter + "</p>";
            }
        }

        return opt;
    }

    private static void ShowHelp(string version)
    {
        Console.WriteLine();
        Console.WriteLine($"WebStatus {version}");
        Console.WriteLine();
        Console.WriteLine("Usage:");
        Console.WriteLine("  WebStatus [-p <port>] [-c <text>] [-h]");
        Console.WriteLine();
        Console.WriteLine("Options:");
        Console.WriteLine("  -p <port>    Set listen port (default: 5000)");
        Console.WriteLine("  -c <text>    Custom footer text shown at page bottom");
        Console.WriteLine("  -h           Show this help and exit");
        Console.WriteLine();
    }
    private static void Show(string version, int port)
    {
        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine(" ");
        Console.WriteLine("======================================");
        Console.WriteLine($" WebStatus {version}");
        Console.WriteLine(" by Da_nuo  |  2026");
        Console.WriteLine(" For internal use only. Do not distribute without permission.");
        Console.WriteLine(" you can use -h to know more");
        Console.WriteLine($" Listen : {port}");
        Console.WriteLine("======================================");
        Console.WriteLine(" ");
        Console.ResetColor();
    }
}