follow-reply.js

// Use Streams API for interacting with a USER ==========
// set up a user stream

var stream = Twitter.stream('user');

// FOLLOW-Reply BOT ===========================

// when someone follows
stream.on('follow', followed);

// ...trigger the callback
function followed(event) {
    console.log('Follow Event is running');
    //get their twitter handler (screen name)
    var
      name = event.source.name,
      screenName = event.source.screen_name;
    // function that replies back to the user who followed
    tweetNow('@' + screenName + ' Thank you for the follow up.');
}

// function definition to tweet back to user who followed
function tweetNow(tweetTxt) {
    var tweet = {
        status: tweetTxt
    }
    Twitter.post('statuses/update', tweet, function(err, data, response) {
      if(err){
        console.log("Error in Replying");
      }
      else{
        console.log("Gratitude shown successfully");
      }
    });
}