ThingError.cs

using System;
using System.Text;
 
namespace Waher.Things
{
    public class ThingError : ThingReference
    {
        private readonly DateTime timestamp;
        private readonly string errorMessage;
 
        public ThingError(IThingReference Thing, string ErrorMessage)
            : this(Thing.NodeId, Thing.SourceId, Thing.Partition, DateTime.Now, ErrorMessage)
        {
        }
 
        public ThingError(string NodeId, string SourceId, string Partition, string ErrorMessage)
            : this(NodeId, SourceId, Partition, DateTime.Now, ErrorMessage)
        {
        }
 
        public ThingError(IThingReference Thing, DateTime Timestamp, string ErrorMessage)
            : this(Thing.NodeId, Thing.SourceId, Thing.Partition, Timestamp, ErrorMessage)
        {
        }
 
        public ThingError(string NodeId, string SourceId, string Partition, DateTime Timestamp, string ErrorMessage)
            : base(NodeId, SourceId, Partition)
        {
            this.timestamp = Timestamp;
            this.errorMessage = ErrorMessage;
        }
 
        public DateTime Timestamp => this.timestamp;
 
        public string ErrorMessage => this.errorMessage;
 
        public override string ToString()
        {
            StringBuilder Output = new StringBuilder();
 
            Output.Append(this.timestamp.ToString("d"));
            Output.Append(", ");
            Output.Append(this.timestamp.ToString("T"));
 
            if (!string.IsNullOrEmpty(this.NodeId))
            {
                Output.Append(", ");
                Output.Append(this.NodeId);
 
                if (!string.IsNullOrEmpty(this.SourceId))
                {
                    Output.Append(", ");
                    Output.Append(this.SourceId);
 
                    if (!string.IsNullOrEmpty(this.Partition))
                    {
                        Output.Append(", ");
                        Output.Append(this.Partition);
                    }
                }
            }
 
            Output.Append(": ");
            Output.Append(this.errorMessage);
 
            return Output.ToString();
        }
    }
}