DelayedActions.cs

using System;
using System.Threading.Tasks;
using Waher.Runtime.Timing;
 
namespace LegalLab.Models
{
    public static class DelayedActions
    {
        private static readonly Scheduler scheduler = new Scheduler();
 
        public static void Add(IDelayedAction Action, DateTime When)
        {
            DateTime TP = Action.ScheduledFor;
            if (TP != DateTime.MinValue)
            {
                Action.ScheduledFor = DateTime.MinValue;
                scheduler.Remove(TP);
            }
 
            Action.ScheduledFor = scheduler.Add(When, ExecuteAction, Action);
        }
 
        public static void Remove(IDelayedAction Action)
        {
            if (Action.ScheduledFor != DateTime.MinValue)
            {
                Action.ScheduledFor = DateTime.MinValue;
                scheduler.Remove(Action.ScheduledFor);
            }
        }
 
        private static async Task ExecuteAction(object P)
        {
            IDelayedAction Action = (IDelayedAction)P;
            await Action.Action();
        }
    }
}