PrettyXml.cs

using System.Xml;
using System.Threading.Tasks;
using Waher.Content.Xml;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Model;
using Waher.Script.Objects;
 
namespace Waher.Script.Xml.Functions
{
    public class PrettyXml : FunctionOneScalarVariable
    {
        public PrettyXml(ScriptNode Argument, int Start, int Length, Expression Expression)
            : base(Argument, Start, Length, Expression)
        {
        }
 
        public override string FunctionName => nameof(PrettyXml);
 
        public override IElement EvaluateScalar(string Argument, Variables Variables)
        {
            return new StringValue(XML.PrettyXml(Argument));
        }
 
        public override IElement EvaluateScalar(IElement Argument, Variables Variables)
        {
            object Obj = Argument.AssociatedObjectValue;
 
            if (Obj is null)
                return Argument;
            else if (Obj is string s)
                return new StringValue(XML.PrettyXml(s));
            else if (Obj is XmlNode N)
                return new StringValue(XML.PrettyXml(N));
            else
                return base.EvaluateScalar(Argument, Variables);
        }
 
        public override Task<IElement> EvaluateScalarAsync(IElement Argument, Variables Variables)
        {
            return Task.FromResult(this.EvaluateScalar(Argument, Variables));
        }
    }
}