cb.cc

#include <stdlib.h>
#include <nan.h>
#include <v8.h>
#include <iostream>

using namespace v8;
using namespace std;

static string *get_string_from_item(Local<Context> context, Local<Value> item) {
    if (!item->IsString()) {
        return nullptr;
    }
    MaybeLocal<String> maybe_str = item->ToString(context);
    if (maybe_str.IsEmpty()) {
        return nullptr;
    }
    v8::String::Utf8Value utf8str(context->GetIsolate(), item);
    return new string(*utf8str);
}

static v8::ModifyCodeGenerationFromStringsResult
CodeGenerationCheckCallback(Local<Context> context, Local<Value> source) {

    std::cout << "calling callback" << "\n";

    string *str = get_string_from_item(context, source);
    MaybeLocal<String> maybe_str = source->ToString(context);
    std::cout << str << "\n";

    return {true, maybe_str};
}

static void setCodeGenerationCheckCallback(const Nan::FunctionCallbackInfo<v8::Value>& info) {

    Isolate *isolate = info.GetIsolate();
    std::cout << "setting callback" << "\n";
    isolate->SetModifyCodeGenerationFromStringsCallback(&CodeGenerationCheckCallback);
    std::cout << "" << "callback set" << "\n";
}

static NAN_MODULE_INIT(Init) {
    Nan::Set(target,
             Nan::New<String>("enableCodeGenerationCheckCallback").ToLocalChecked(),
             Nan::GetFunction(Nan::New<FunctionTemplate>(setCodeGenerationCheckCallback)).ToLocalChecked()
            );
}

NODE_MODULE(addon, Init)