OnNote.cs

using System.Threading.Tasks;
using System.Xml;
using Waher.Content.Xml;
using Waher.Persistence.Attributes;
using Waher.Service.IoTBroker.StateMachines.Model.Attributes;
 
namespace Waher.Service.IoTBroker.StateMachines.Model.Events
{
    public abstract class OnNote : TokenEventNode
    {
        private ScriptableStringAttribute noteVariable;
        private ScriptableStringAttribute personalVariable;
 
        public OnNote()
            : base()
        {
        }
 
        [DefaultValueNull]
        public string NoteVariableDefinition
        {
            get => this.noteVariable?.Definition;
            set => this.noteVariable = new ScriptableStringAttribute(value, this);
        }
 
        [DefaultValueNull]
        public string PersonalVariableDefinition
        {
            get => this.personalVariable?.Definition;
            set => this.personalVariable = new ScriptableStringAttribute(value, this);
        }
 
        public override Task Parse(XmlElement Xml)
        {
            this.noteVariable = new ScriptableStringAttribute(XML.Attribute(Xml, "noteVariable"), this);
            this.personalVariable = new ScriptableStringAttribute(XML.Attribute(Xml, "personalVariable"), this);
 
            return base.Parse(Xml);
        }
 
        protected Task<string> EvaluateNoteVariable(EvaluationArguments Arguments)
        {
            return this.noteVariable?.Evaluate(Arguments.Variables) ?? Task.FromResult<string>(null);
        }
 
        protected Task<string> EvaluatePersonalVariable(EvaluationArguments Arguments)
        {
            return this.personalVariable?.Evaluate(Arguments.Variables) ?? Task.FromResult<string>(null);
        }
    }
}