Pass object to AsyncWorker

binding.cpp

#include<napi.h>

#include <chrono>
#include <thread>

use namespace Napi;

class EchoWorker : public AsyncWorker {
    public:
        EchoWorker(Function& callback, Object& options, std::string& echo)
        : AsyncWorker(callback){
            options(Persistent(options));  
            echo(echo); 
        }

        ~EchoWorker() {}
    // This code will be executed on the worker thread
    void Execute() {
        // Need to simulate cpu heavy task
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }

    void OnOK() {
        HandleScope scope(Env());
        Callback().Call({Env().Null(), options.Value(),  String::New(Env(), echo)});
    }

    private:
        ObjectReference options;
        std::string echo;
};


Value Echo(const CallbackInfo& info) {
    // You need to validate the arguments here.
    Function cb = info[1].As<Function>();
    std::string in = info[0].As<String>();
    Object opts = info[2].As<Object>();
    EchoWorker* wk = new EchoWorker(cb, opts, in);
    wk->Queue();
    return info.Env().Undefined();
}