Date.cs

using System;
using System.Threading.Tasks;
using System.Xml;
using Waher.Content.Xml;
using Waher.Service.IoTBroker.StateMachines.Exceptions;
 
namespace Waher.Service.IoTBroker.StateMachines.Model.Values
{
    public class Date : ValueNode
    {
        public Date()
            : base()
        {
        }
 
        public System.DateTime Value { get; set; }
 
        public override string LocalName => nameof(Date);
 
        public override IStateMachineNode Create()
        {
            return new Date();
        }
 
        public override Task Parse(XmlElement Xml)
        {
            if (!XML.TryParse(Xml.InnerText, out System.DateTime TP))
                throw new StateMachineException(this.StateMachine, "Invalid DateTime value.");
 
            if (TP.TimeOfDay != TimeSpan.Zero)
                throw new StateMachineException(this.StateMachine, "Invalid Date value.");
 
            this.Value = TP;
 
            return base.Parse(Xml);
        }
 
        public override Task<object> Evaluate(EvaluationArguments Arguments)
        {
            return Task.FromResult<object>(this.Value);
        }
    }
}