ResourceFileName.cs

using Waher.Script;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Objects;
 
namespace Waher.IoTGateway.ScriptExtensions.Functions
{
    public class ResourceFileName : FunctionOneScalarVariable
    {
        public ResourceFileName(ScriptNode LocalResource, int Start, int Length, Expression Expression)
            : base(LocalResource, Start, Length, Expression)
        {
        }
 
        public override string FunctionName => nameof(ResourceFileName);
 
        public override string[] DefaultArgumentNames => new string[] { "LocalResource" };
 
        public override IElement EvaluateScalar(string Argument, Variables Variables)
        {
            if (!Gateway.HttpServer.TryGetFileName(Argument, false, out string FileName))
                throw new ScriptRuntimeException("Unable to convert local resource to file name.", this);
 
            return new StringValue(FileName);
        }
    }
}