RootTopic.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using Waher.Runtime.Inventory;
using Waher.Runtime.Language;
using Waher.Things.Mqtt;
 
namespace Waher.Things.Ieee1451.Ieee1451_1_6
{
    public class RootTopic : MqttTopicNode
    {
        public RootTopic()
        {
        }
 
        public override Grade Supports(MqttTopicRepresentation Topic)
        {
            if (!(Topic.CurrentParentTopic is null))
                return Grade.NotAtAll;
 
            switch (Topic.CurrentSegment)
            {
                case "璑":   // Unicode character representing the bytes 145, 116
                case "1451.1.6":
                case "_1451.1.6":
                    return Grade.Perfect;
 
                default:
                    return Grade.NotAtAll;
 
            }
        }
 
        public override async Task<IMqttTopicNode> CreateNew(MqttTopicRepresentation Topic)
        {
            return new RootTopic()
            {
                NodeId = await GetUniqueNodeId(Topic.CurrentSegment),
                LocalTopic = Topic.CurrentSegment
            };
        }
 
        public override Task<bool> AcceptsChildAsync(INode Child)
        {
            return Task.FromResult(Child is DiscoverableTopicNode);
        }
 
        public override Task<bool> AcceptsParentAsync(INode Parent)
        {
            return Task.FromResult(Parent is MqttBrokerNode);
        }
 
        public override Task<string> GetTypeNameAsync(Language Language)
        {
            return Language.GetStringAsync(typeof(RootTopic), 11, "IEEE 1451.1.6 Root");
        }
 
        public override Task<IEnumerable<ICommand>> Commands => this.GetCommands();
 
        private async Task<IEnumerable<ICommand>> GetCommands()
        {
            List<ICommand> Commands = new List<ICommand>();
            Commands.AddRange(await base.Commands);
 
            Commands.Add(new DiscoverNcapsRoot(await this.GetBroker())
            {
                Topic = "_1451.1.6/D0"
            });
 
            return Commands.ToArray();
        }
 
    }
}