ScriptResource.cs

using System.Threading.Tasks;
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 ScriptResource : FunctionTwoVariables
    {
        public ScriptResource(ScriptNode Resource, ScriptNode Exp, int Start, int Length, Expression Expression)
            : base(Resource, Exp, Start, Length, Expression)
        {
        }
 
        public override string FunctionName => nameof(ScriptResource);
 
        public override string[] DefaultArgumentNames => new string[] { "Resource", "Expression" };
 
        public override bool IsAsynchronous => true;
 
        public override IElement Evaluate(Variables Variables)
        {
            return this.EvaluateAsync(Variables).Result;
        }
 
        public override async Task<IElement> EvaluateAsync(Variables Variables)
        {
            IElement E;
 
            if (this.Argument1.IsAsynchronous)
                E = await this.Argument1.EvaluateAsync(Variables);
            else
                E = this.Argument1.Evaluate(Variables);
 
            if (!(E is StringValue S))
                throw new ScriptRuntimeException("Expected string resource name.", this);
 
            string ResourceName = S.Value;
 
            return new BooleanValue(await Gateway.AddScriptResource(ResourceName, this.Argument2, this.Expression.Source ?? string.Empty));
        }
 
        public override IElement Evaluate(IElement Argument1, IElement Argument2, Variables Variables)
        {
            return BooleanValue.False;
        }
 
    }
}