NodeJS Promises

gistfile1.js

function getTweets (req, res) {

        var d = Q.defer();

        T.get('statuses/user_timeline', {screen_name: 'petetasker', count: 2}, function (err, data, response) {

            if (err) {
                var error = new Error('Something went wrong trying to get Tweets');
                error.innerError = err;
                throw error;
            }

            //return tweet data if no error
            d.resolve(data, err, model);
        });

        //Return a promise
        return d.promise;
    }

function processTweets( tweets ) {

        var d = Q.defer();

        var formattedTweets = [];
        if (tweets) {

            var processed_data = [];
            tweets.forEach(function (status) {
                processed_data.push(status);
            });

        }
        d.resolve( processed_data );
        return d.promise;
}

getTweets(req, res)
.then(processTweets)
.done();