AppManager.cs

namespace Hint;

using System.Diagnostics;

public class AppManager
{
    private readonly List<AppDefinition> apps;
    private readonly Dictionary<string, Process?> running = new();

    public AppManager(List<AppDefinition> apps)
    {
        this.apps = apps;
        foreach (var a in apps) running[a.Name] = null;
    }

    public bool TryGetApp(string name, out AppDefinition app)
    {
        app = apps.FirstOrDefault(a => a.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
        return app != null;
    }

    public async Task EnsureAllRunningAsync()
    {
        foreach (var a in apps) await EnsureRunning(a);
    }

    public async Task EnsureRunning(AppDefinition a)
    {
        if (running[a.Name] != null && !running[a.Name].HasExited) return;

        var parts = SplitCommand(a.StartCommand);
        var psi = new ProcessStartInfo(parts.command, parts.args)
        {
            WorkingDirectory = a.Path,
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            UseShellExecute = false
        };

        var p = Process.Start(psi);
        running[a.Name] = p;

        await Task.Delay(500);
    }

    private (string command, string args) SplitCommand(string cmd)
    {
        if (string.IsNullOrEmpty(cmd)) return ("", "");
        var i = cmd.IndexOf(' ');
        if (i < 0) return (cmd, "");
        return (cmd[..i], cmd[(i + 1)..]);
    }
}