OnExternalNote.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 OnExternalNote : OnNote
    {
        private ScriptableStringAttribute privilege;
        private ScriptableStringAttribute sourceVariable;
 
        public OnExternalNote()
            : base()
        {
        }
 
        [DefaultValueNull]
        public string PrivilegeDefinition
        {
            get => this.privilege?.Definition;
            set => this.privilege = new ScriptableStringAttribute(value, this);
        }
 
        [DefaultValueNull]
        public string SourceVariableDefinition
        {
            get => this.sourceVariable?.Definition;
            set => this.sourceVariable = new ScriptableStringAttribute(value, this);
        }
 
        public override Task Parse(XmlElement Xml)
        {
            this.sourceVariable = new ScriptableStringAttribute(XML.Attribute(Xml, "sourceVariable"), this);
            this.privilege = new ScriptableStringAttribute(XML.Attribute(Xml, "privilege"), this);
 
            return base.Parse(Xml);
        }
 
        protected Task<string> GetSourceVariable(EvaluationArguments Arguments)
        {
            return this.sourceVariable.Evaluate(Arguments.Variables);
        }
 
        protected Task<string> GetPrivilege(EvaluationArguments Arguments)
        {
            return this.privilege.Evaluate(Arguments.Variables);
        }
    }
}