EffectiveOrJustActive.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;

namespace matzoeffectiveo
{
    class Program
    {
        private static Random Rand = new Random();

        static void Main(string[] e)
        {
            try
            {
                var next = GetNextTimeUtc();
                while (true)
                {
                    if (DateTime.UtcNow >= next)
                    {
                        Console.WriteLine("Checking...");

                        var args = new ProcessStartInfo("pgrep", "ScreenSaverEngine")
                        {
                            RedirectStandardOutput = true,
                            UseShellExecute = false
                        };
                        var proc = Process.Start(args);
                        proc.WaitForExit();

                        var ids = new List<int>();
                        while (true)
                        {
                            var buf = proc.StandardOutput.ReadLine();
                            if (buf == null)
                                break;

                            ids.Add(Convert.ToInt32(buf));
                            Console.WriteLine(buf);
                        }

                        if (!(ids.Any()))
                        {
                            Console.WriteLine("Reminding...");
                            Process.Start("say", "Matt, are you being effective or just active?");
                        }
                        else
                            Console.WriteLine("Screensaver found.");

                        next = GetNextTimeUtc();
                    }

                    Thread.Sleep(5000);
                }
            }
            catch(Exception ex)
            {
                Console.WriteLine(ex);
            }
            finally
            {
                if(Debugger.IsAttached)
                    Console.ReadLine();
            }
        }

        private static DateTime GetNextTimeUtc()
        {
            var mins = Rand.Next(30, 60);
            var dt = DateTime.UtcNow.AddMinutes(mins);
            Console.WriteLine("Next time to run --> " + dt);
            return dt;
        }
    }
}