Delay.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using System.Xml;
using Waher.Content;
using Waher.Content.Xml;
using Waher.Script;
 
namespace TAG.Simulator.ObjectModel.Activities
{
    public class Delay : ActivityNode
    {
        private Duration duration;
 
        public Delay(ISimulationNode Parent, Model Model)
            : base(Parent, Model)
        {
        }
 
        public Duration Duration => this.duration;
 
        public override string LocalName => nameof(Delay);
 
        public override ISimulationNode Create(ISimulationNode Parent, Model Model)
        {
            return new Delay(Parent, Model);
        }
 
        public override Task FromXml(XmlElement Definition)
        {
            this.duration = XML.Attribute(Definition, "duration", Duration.Zero);
 
            return Task.CompletedTask;
        }
 
        public override async Task<LinkedListNode<IActivityNode>> Execute(Variables Variables)
        {
            DateTime Now = DateTime.Now;
            DateTime TP = Now + this.duration;
            TimeSpan TS = TP - Now;
 
            if (TS > TimeSpan.Zero)
                await Task.Delay(TS);
 
            return null;
        }
 
        public override void ExportPlantUml(StreamWriter Output, int Indentation, char QuoteChar)
        {
            Indent(Output, Indentation);
            Output.Write(":Delay(");
 
            Values.Duration.ExportText(this.duration, Output);
 
            Output.WriteLine(");");
        }
    }
}