How about a Twitter Bot that retweets, favorites, on the basis of hashtags and replies to other users if they follow it? I made a similar kind of a Twitter Bot (@nodejstweet) that feeds me the latest or the ongoing news/articles/how-to’s on a set of hashtags such as #Nodejs, #MongoDB, #AngularJS, #IonicFramework, et cetera. At the time I never expected it having more followers than me but that has been surpassed.

A glimpse of a Twitter Bot that I made for sole purpose of information

What this bot will do?

This is a simple Twitter bot and will retweet, favorite/like randomly on the basis of hashtags as a query that we will use and continue to do so after a certain period of time interval.

What you need?

You must have Node.js installed on your system.

A Twitter Account.

Your bot will be using twit which is an npm module to manipulate tweets and streams, and to communicate with the Twitter API.

Let’s Start

Setup an empty directory and initialise it with: $ npm init to configure this web application with package.json file. Then create two new files: bot.js & config.js in that directory.

bot.js will be our main app file in which we will be writing the source code of our Twitter Bot, and so in package.json edit the main field to:

{

"main": "bot.js",

},

Your current directory structure should look like this:

root/project-name

|- bot.js

|- config.js

|- package.json

Configuring and granting permissions from Twitter API

After logging to to your Twitter account, follow to this link: https://apps.twitter.com/app/new to create a new application. Fill out the necessary fields in the form click on the button Create Your Twitter Application. After creating the application, look for ‘Keys and Access Tokens’ under the nav-panes and click on ‘Generate Token Actions` and then copy:

Consumer Key

Consumer Secret

Access Token

Access Token Secret

Open the config.js file and paste all four values inside it. Expose those values using module.export :

//config.js

/** TWITTER APP CONFIGURATION

* consumer_key

* consumer_secret

* access_token

* access_token_secret

*/ module.exports = {

consumer_key: '',

consumer_secret: '',

access_token: '',

access_token_secret: ''

}

Now, the Twitter bot’s configuration is step is complete. Please note, for every different application, the consumer key , consumer secret , access_token and access_token_secret will differ.

Building the bot

Since the configuration step is complete, now let’s install our third requisite that is Twitter API client for node and will help us to communicate to Twitter API and provide an API for all necessary actions (such as retweet and favorite a tweet).

We will start by installing the dependency we need for our application.

$ npm install --save twit

After the dependency has finished installing, go to the bot.js file and require the dependency and config.js file.

var twit = require(’twit’);

var config = require(’./config.js’);

Pass the configuration (consumer and access tokens) of our Twitter application in config.js to twit:

var Twitter = new twit(config);

So far, so good?

PLEASE NOTE: You must refer to twit documentation for a deep reference.

Retweet Bot

Let’s write a function expression that finds the latest tweets according to the query passed as a parameter. We will initialise a params object that will hold various properties to search a tweet, but most importantly query or q property that will refine our searches. Whatever value you feed in this property, our bot will search the tweets to retweet based on this criteria. You can feed this property values like a twitter handler, to monitor a specific twitter account or a #hashtag. For our example bot, we have find latest tweets on #nodejs.

This is how the functionality of the retweet bot starts:

var retweet = function() {

var params = {

q: '#nodejs, #Nodejs',

result_type: 'recent',

lang: 'en'

}

The other two properties: result_type and lang are optional. On defining the result_type: 'recent' notifies bot to only search for the latest tweets, tweets that have occurred in the time period since our bot has started or it made the last retweet.

There is a list of parameters provided by the Twitter API.

Our next step is to search for the tweets based on our parameters. For this, we will use Twitter.get function provided by twit API to GET any of the REST API endpoints. The REST API endpoint is a reference to the Twitter API endpoint we are going to make a call to search for tweets. The Twitter.get function accepts three arguments: API endpoint, params object (defined by us) and a callback.

To post or to retweet the tweet our bot has found we use Twitter.post() method to POST any of the REST API endpoints. It also takes the same number of arguments as Twitter.get() .

Now to automate this action we defined above, we can use JavaScript’s timer function setInterval() to search and retweet after a specific period of time.

// grab & retweet as soon as program is running...

retweet();

// retweet in every 50 minutes

setInterval(retweet, 3000000);

Please note that all JavaScript’s Timer functions take the amount of time argument in milliseconds.

Favorite Bot

Similar to retweet bot we can define and initialise another function expression that will search and favorite a tweet randomly. Yes, the difference here is to search and grab the tweet randomly. We will start by creating a parameter object params that will consist of three properties as in retweet() function expression. The bot will search for tweets using the same .get() function provided by twit API to GET any of the Twitter API endpoints. In our case, we need search/tweets . Then we will store the status of the search for tweet to favorite in a variable and in a another variable we will apply the random function by passing the “status of the search” variable as an argument.