Create exportable object or module to wrap third-party library with CommonJS/NodeJS javascript

I'm new to JavaScript and creating classes/objects. I'm trying to wrap an open source library's code with some simple methods for me to use in my routes.

I have the below code that is straight from the source (sjwalter's Github repo; thanks Stephen for the library!).

I'm trying to export a file/module to my main app/server.js file with something like this:

var twilio = require('nameOfMyTwilioLibraryModule');

or whatever it is I need to do.

I'm looking to create methods like twilio.send(number, message)that I can easily use in my routes to keep my code modular. I've tried a handful of different ways but couldn't get anything to work. This might not be a great question because you need to know how the library works (and Twilio too). The var phone = client.getPh开发者_如何学ConeNumber(creds.outgoing); line makes sure that my outgoing number is a registered/paid for number.

Here's the full example that I'm trying to wrap with my own methods:

var TwilioClient = require('twilio').Client,
Twiml = require('twilio').Twiml,
creds = require('./twilio_creds').Credentials,
client = new TwilioClient(creds.sid, creds.authToken, creds.hostname),
// Our numbers list. Add more numbers here and they'll get the message
numbers = ['+numbersToSendTo'],
message = '',
numSent = 0;

var phone = client.getPhoneNumber(creds.outgoing);
phone.setup(function() {

for(var i = 0; i < numbers.length; i++) {
    phone.sendSms(numbers[i], message, null, function(sms) {
        sms.on('processed', function(reqParams, response) {
            console.log('Message processed, request params follow');
            console.log(reqParams);
            numSent += 1;
            if(numSent == numToSend) {
                process.exit(0);
            }
        });
    });
}

});`

Simply add the function(s) you wish to expose as properties on the exports object. Assuming your file was named mytwilio.js and stored under app/ and looks like,

app/mytwilio.js

var twilio = require('twilio');
var TwilioClient = twilio.Client;
var Twiml = twilio.Twiml;
var creds = require('./twilio_creds').Credentials;
var client = new TwilioClient(creds.sid, creds.authToken, creds.hostname);

// keeps track of whether the phone object
// has been populated or not.
var initialized = false;
var phone = client.getPhoneNumber(creds.outgoing);
phone.setup(function() {
    // phone object has been populated
    initialized = true;
});

exports.send = function(number, message, callback) {
    // ignore request and throw if not initialized
    if (!initialized) {
        throw new Error("Patience! We are init'ing");
    }
    // otherwise process request and send SMS
    phone.sendSms(number, message, null, function(sms) {
        sms.on('processed', callback);
    });
};

This file is mostly identical to what you already have with one crucial difference. It remembers whether the phone object has been initialized or not. If it hasn't been initialized, it simply throws an error if send is called. Otherwise it proceeds with sending the SMS. You could get fancier and create a queue that stores all messages to be sent until the object is initialized, and then sends em' all out later.

This is just a lazy approach to get you started. To use the function(s) exported by the above wrapper, simply include it the other js file(s). The send function captures everything it needs (initialized and phone variables) in a closure, so you don't have to worry about exporting every single dependency. Here's an example of a file that makes use of the above.

app/mytwilio-test.js

var twilio = require("./mytwilio");

twilio.send("+123456789", "Hello there!", function(reqParams, response) {
    // do something absolutely crazy with the arguments
});

If you don't like to include with the full/relative path of mytwilio.js, then add it to the paths list. Read up more about the module system, and how module resolution works in Node.JS.