SetSetting.cs

using System.Threading.Tasks;
using Waher.Runtime.Settings;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Model;
using Waher.Script.Objects;
 
namespace Waher.Script.Persistence.Functions
{
    public class SetSetting : FunctionMultiVariate
    {
        public SetSetting(ScriptNode Name, ScriptNode Value, int Start, int Length, Expression Expression)
            : base(new ScriptNode[] { Name, Value }, argumentTypes2Scalar, Start, Length, Expression)
        {
        }
 
        public SetSetting(ScriptNode Host, ScriptNode Name, ScriptNode Value, int Start, int Length, Expression Expression)
            : base(new ScriptNode[] { Host, Name, Value }, argumentTypes3Scalar, Start, Length, Expression)
        {
        }
 
        public override string FunctionName => nameof(SetSetting);
 
        public override string[] DefaultArgumentNames => new string[] { "Name", "Value" };
 
        public override bool IsAsynchronous => true;
 
        public override IElement Evaluate(IElement[] Arguments, Variables Variables)
        {
            return this.EvaluateAsync(Arguments, Variables).Result;
        }
 
        public override async Task<IElement> EvaluateAsync(IElement[] Arguments, Variables Variables)
        {
            int i = 0;
            int c = Arguments.Length;
            string Host = c < 3 ? null : GetSetting.GetHost(Arguments[i++].AssociatedObjectValue, this);
            string Name = Arguments[i++].AssociatedObjectValue?.ToString();
            object Value = Arguments[i].AssociatedObjectValue;
            bool Result;
 
            if (string.IsNullOrEmpty(Host))
                Result = await RuntimeSettings.SetAsync(Name, Value);
            else
                Result = await HostSettings.SetAsync(Host, Name, Value);
 
            return new BooleanValue(Result);
        }
    }
}