UuidConstructor.cs

using System;
using Jint.Native;
using Jint.Native.Function;
using Jint.Native.Object;
using Jint.Runtime;
using Jint.Runtime.Descriptors;
using Jint.Runtime.Interop;

namespace Jint.Tests.Runtime.Domain
{
    internal sealed class UuidConstructor : FunctionInstance, IConstructor
    {
        private static readonly JsString _functionName = new JsString("Uuid");

        private UuidConstructor(Engine engine) : base(engine, _functionName)
        {
        }

        private JsValue Parse(JsValue @this, JsValue[] arguments)
        {
            switch (arguments.At(0))
            {
                case JsUuid uid:
                    return Construct(uid);

                case JsValue js when Guid.TryParse(js.AsString(), out var res):
                    return Construct(res);
            }

            return Undefined;
        }

        protected override ObjectInstance GetPrototypeOf() => _prototype;

        internal ObjectInstance _prototype;

        public UuidPrototype PrototypeObject { get; private set; }

        public static UuidConstructor CreateUuidConstructor(Engine engine)
        {
            var obj = new UuidConstructor(engine)
            {
                // The value of the [[Prototype]] internal property of the Uuid constructor is the Function prototype object
                _prototype = engine.Function.PrototypeObject
            };
            obj.PrototypeObject = UuidPrototype.CreatePrototypeObject(engine, obj);

            // The initial value of Uuid.prototype is the Date prototype object
            obj.SetOwnProperty("prototype", new PropertyDescriptor(obj.PrototypeObject, false, false, false));

            engine.SetValue("Uuid", obj);
            obj.Configure();
            obj.PrototypeObject.Configure();

            return obj;
        }

        public override JsValue Call(JsValue thisObject, JsValue[] arguments) => Construct(arguments, null);

        public void Configure()
        {
            FastAddProperty("parse", new ClrFunctionInstance(Engine, "parse", Parse), true, false, true);
            FastAddProperty("Empty", JsUuid.Empty, true, false, true);
        }

        public UuidInstance Construct(JsUuid uuid) => new UuidInstance(Engine) { PrimitiveValue = uuid, _prototype = PrototypeObject };

        public ObjectInstance Construct(JsValue[] arguments, JsValue newTarget) => Construct(Guid.NewGuid());
    }
}