OnDateTime.cs

using System.Threading.Tasks;
using System.Xml;
using Waher.Persistence.Attributes;
using Waher.Service.IoTBroker.StateMachines.Model.Attributes;
 
namespace Waher.Service.IoTBroker.StateMachines.Model.Events
{
    public class OnDateTime : TimedEventNode
    {
        private ScriptableDateTimeAttribute value;
 
        public OnDateTime()
            : base()
        {
        }
 
        [DefaultValueNull]
        public string ValueDefinition
        {
            get => this.value?.Definition;
            set => this.value = new ScriptableDateTimeAttribute(value, this);
        }
 
        public override string LocalName => nameof(OnDateTime);
 
        public override IStateMachineNode Create()
        {
            return new OnDateTime();
        }
 
        public override Task Parse(XmlElement Xml)
        {
            this.value = new ScriptableDateTimeAttribute(Xml.InnerText, this);
 
            return base.Parse(Xml);
        }
 
        public override async Task<EventTimepoint> GetEventTimepoint(EvaluationArguments Arguments)
        {
            if (this.value is null)
                return new EventTimepoint();
            else
                return new EventTimepoint(await this.value.Evaluate(Arguments.Variables));
        }
 
        public override string Label => this.value.Definition;
    }
}