SingletonMachineId.cs

using Waher.Service.IoTBroker.NeuroFeatures;
using Waher.Service.IoTBroker.StateMachines.Exceptions;
using Waher.Service.IoTBroker.StateMachines.Model.Values;
 
namespace Waher.Service.IoTBroker.StateMachines.Model
{
    public class SingletonMachineId : TagReference
    {
        public SingletonMachineId()
            : base()
        {
        }
 
        public override string LocalName => nameof(SingletonMachineId);
 
        public override IStateMachineNode Create()
        {
            return new SingletonMachineId();
        }
 
        public override void CheckReferences(StateMachine Machine, Token Token)
        {
            if (!this.tag.IsConstant)
                throw new StateMachineException(Machine, "Singleton Machine IDs must be constant tag references.");
 
            if (!Token.TryGetTagValue(this.tag.Definition, out object Value))
                throw new StateMachineException(Machine, "Tag not found: " + this.tag.Definition);
 
            if (!(Value is string MachineId))
                throw new StateMachineException(Machine, "Singleton Machine IDs must be strings.");
 
            int i = MachineId.IndexOf('@');
            int j = Token.TokenId.IndexOf('@');
 
            if (j >= 0)
            {
                if (i < 0)
                    MachineId += Token.TokenId.Substring(j);
                else if (MachineId[i..] != Token.TokenId.Substring(j))
                    throw new StateMachineException(this.StateMachine, "Invalid Singleton Machine ID domain.");
            }
 
            Machine.StateMachineId = MachineId;
        }
    }
}