grzeslack-app.js

var Botkit = require('botkit');

if (!process.env.clientId || !process.env.clientSecret || !process.env.PORT) {
  console.log('Error: Specify clientId clientSecret and port in environment');
  process.exit(1);
}

var controller = Botkit.slackbot({
  // interactive_replies: true, // tells botkit to send button clicks into conversations
  json_file_store: './db_slackbutton_bot/',
  // rtm_receive_messages: false, // disable rtm_receive_messages if you enable events api
}).configureSlackApp(
  {
    clientId: process.env.clientId,
    clientSecret: process.env.clientSecret,
    scopes: ['bot'],
  }
);

controller.setupWebserver(process.env.PORT,function(err,webserver) {
  controller.createWebhookEndpoints(controller.webserver);

  controller.createOauthEndpoints(controller.webserver,function(err,req,res) {
    if (err) {
      res.status(500).send('ERROR: ' + err);
    } else {
      res.send('Success!');
    }
  });
});


// just a simple way to make sure we don't
// connect to the RTM twice for the same team
var _bots = {};
function trackBot(bot) {
  _bots[bot.config.token] = bot;
}


controller.on('create_bot',function(bot,config) {

  if (_bots[bot.config.token]) {
    // already online! do nothing.
  } else {
    bot.startRTM(function(err) {

      if (!err) {
        trackBot(bot);
      }

      bot.startPrivateConversation({user: config.createdBy},function(err,convo) {
        if (err) {
          console.log(err);
        } else {
          convo.say('I am a bot that has just joined your team');
          convo.say('You must now /invite me to a channel so that I can be of use!');
        }
      });

    });
  }

});