Greenworks MicroTxnAuthorizationListener

MicroTxnAuthorizationListener_snippet.cc

// In `greenworks_api.cc`:

static MicroTxnAuthorizationListener *microTxnAuthorizationListener;

//...

NAN_METHOD(SetMicroTxnAuthorizationResponseCallback) {
  Nan::HandleScope scope;
  if (info.Length() < 1 || !info[0]->IsFunction()) {
    THROW_BAD_ARGS("Bad arguments - [SetMicroTxnAuthorizationResponseCallback]");
  }
  Nan::Callback* event_callback = new Nan::Callback(info[0].As<v8::Function>());
  microTxnAuthorizationListener = new MicroTxnAuthorizationListener(event_callback);
  info.GetReturnValue().Set(Nan::Undefined());
}

//...

  Nan::Set(target,
    Nan::New("SetMicroTxnAuthorizationResponseCallback").ToLocalChecked(),
    Nan::New<v8::FunctionTemplate>(SetMicroTxnAuthorizationResponseCallback)->GetFunction());




//Our MicroTxnAuthorizationListener class:

// class that does nothing other than register itself as a Steam
// callback listener when it is constructed
class MicroTxnAuthorizationListener {

public:
    MicroTxnAuthorizationListener(Nan::Callback* event_callback)
        // initializing this member object is what actually
        // registers our callback
        : mMicroTxnAuthorizationResponse(
        this,
        &MicroTxnAuthorizationListener::OnMicroTxnAuthorizationResponse) {
			cb = event_callback;
    }

    // callback when ready
    // this macro declares our callback function for us AND
    // defines our member object
    STEAM_CALLBACK(
        // class that the callback function is in
        MicroTxnAuthorizationListener,
        // name of callback function
        OnMicroTxnAuthorizationResponse,
        // type of callback
        MicroTxnAuthorizationResponse_t,
        // name of the member object       
        mMicroTxnAuthorizationResponse);

private:
	Nan::Callback* cb;
	MicroTxnAuthorizationResponse_t lastResponse_;
};

void MicroTxnAuthorizationListener::OnMicroTxnAuthorizationResponse(MicroTxnAuthorizationResponse_t  *callbackData) {

  std::cout << "OnMicroTxnAuthorizationResponse" << std::endl;

  //Convert orderId ulong to double
  double dbl_orderId = (double)callbackData->m_ulOrderID;

  Nan::HandleScope scope;
	v8::Local<v8::Object> sendData = Nan::New<v8::Object>();
	sendData->Set(Nan::New("orderId").ToLocalChecked(), Nan::New(dbl_orderId));
	sendData->Set(Nan::New("authorized").ToLocalChecked(), Nan::New(callbackData->m_bAuthorized));
	v8::Local<v8::Value> argv[] = { sendData };
	cb->Call(1, argv);
}