EventNode.cs

using System.Threading.Tasks;
using Waher.Service.IoTBroker.StateMachines.EventHandlers;
using Waher.Service.IoTBroker.StateMachines.Model.States;
 
namespace Waher.Service.IoTBroker.StateMachines.Model.Events
{
    public abstract class EventNode : StateMachineNode
    {
        public EventNode()
            : base()
        {
        }
 
        public abstract string Label { get; }
 
        public abstract Task<EventHandlerReference> Register(int EventIndex, EvaluationArguments Arguments, OnEvent Event);
 
        public virtual Task Unregister(int EventIndex, EvaluationArguments Arguments)
        {
            return Task.CompletedTask;  // Do nothing by default.
        }
 
        public virtual Task<EventHandlerReference> StateUpdated(EvaluationArguments Arguments)
        {
            return Task.FromResult<EventHandlerReference>(null);
        }
 
        public virtual Task<bool> Applies(EvaluationArguments Arguments)
        {
            return Task.FromResult(true);
        }
    }
}