Basic Slack Bot Node.js

kramerbot.js

'use strict';

var messages = [
    'Giddyup',
    'Isosceles. You know, I love the name Isosceles. If I had a kid, I would name him Isosceles. Isosceles Kramer.',
    'You know what you are? You’re an anti-dentite! It starts with a few jokes and slurs… ‘HEY DENTY!’ Then you will say that dentists should have their own schools!',
    'Have you ever met a proctologist? They usually have a very good sense of humor. You meet a proctologist at a party, don’t walk away. Plant yourself there because you will hear the funniest stories you’ve ever heard.',
    'What do you think Junior? You think these hands – they’ve been soaking in Ivory Liquid?',
    'http://i.giphy.com/aMh59aKR8vjdC.gif'
];

var Bot = require('slackbots');

// create a bot
var settings = {
    token: 'XXXXX',
    name: 'kramerbot'
};
var bot = new Bot(settings);

bot.on( 'message', function(message) {

    var me = this.users.filter(function (user) {
        return user.name === 'kramerbot';
    })[0];

    if( message.type === 'message' && Boolean(message.text) ) {

        if( message.text.toLowerCase().indexOf('kramer') > -1
              || message.text.toLowerCase().indexOf(this.name) > -1
              || message.text.indexOf(me.id) > -1) {

          if( message.user !== me.id ) {
              var params = {
                  link_names: 1,
                  as_user: true
              };

              var fromUser = this.users.filter(function(user) {
                  return user.id === message.user;
              })[0]['name'];

              var channel = this.channels.filter(function (item) {
                  return item.id === message.channel;
              })[0];

              var randMessage = messages[Math.floor(Math.random() * messages.length)];

              bot.postMessageToChannel(channel.name, '@' + fromUser + ' ' + randMessage, params);
          }

        }
    }
});