I'm playing with creating Node.js modules in C++, but I'm stumped on the v8::Arguments class. Lets say I have a Javascript class for sending emails, which has a method with this signature:
Mailer::sendEmail(Array recipients, String sender, String message);
Which would be called like this:
mailer.sendEmail(["[email protected]", "[email protected]"], "[email protected]", "Hi there");
Now in C++ land, I have a class function with this signature:
SendEmail(const v8::Arguments& args)
Which is backing my Mailer::sendEmail method in Javascript land. The SendEmail function will create a new instance of my Emailer class, which itself has a class function with this signature:
send(std::list<std::string> recipients, std::string from, std::string message)
And this is where I'm lost. I don't know how to take the values from args, and convert them into regular C++ types, so I can pass the values to my send function. As I understand it, the 3 values passed to Mailer::sendEmail will be available in args[0], args[1], and args[2]. I even understand I can do some type checking like if (!args[0]->IsArray())
, but actually converting args[0] to std::list<std::string>
is what I don't know how to do.
Edit: I found a hackish way of doing this, but I still think V8 has some built in methods to handle this in a cleaner way.
static Handle<Value> SendEmail(const Arguments& args)
{
HandleScope scope;
list<string> values;
Local<Object> obj = args[0]->ToObject();
Local<Array> props = obj->GetPropertyNames();
// Iterate through args[0], adding each element to our list
for(unsigned int i = 0; i < props->Length(); i++) {
String::AsciiValue val(obj->Get(i)->ToString());
values.push_front(string(*val));
}
// Display the values in the list for debugging purposes
for (list<string>::iterator it = values.begin(); it != values.end(); it++) {
cout << *it << endl;
}
return scope.Close(args.This());
}
I know this is an older topic, but the way I tend to do this is as follows:
Handle<Value> MethodName (const Arguments& args) {
// get the param
v8::String::Utf8Value param1(args[0]->ToString());
// convert it to string
std::string foo = std::string(*param1);
}