bot.js

console.log('BumbleBot is starting...');

// Ensure NPM packages are installed
var Twit = require('twit');
var config = require('./config');
var exec = require('child_process').exec;
var fs = require('fs');

var T = new Twit(config);

loop();

function loop() {
  var now = new Date();
  if ((now.getHours() % 2 === 0) && now.getMinutes() === 0) {
    tweetIt();
  }
  now = new Date(); // allow for time passing
  var delay = 60000 - (now % 60000); // exact ms to next minute interval
  setTimeout(loop, delay);
}

function tweetIt() {
  // Path to Processing sketch
  var cmd = 'bumblebot/bumblebot';
  exec(cmd, processing);

  function processing() {
    var imgFilename = 'bumblebot/output.png'; // Path to image file output from Processing
    var imgParams = {
      encoding: 'base64'
    }
    var imgBee = fs.readFileSync(imgFilename, imgParams); // Read image

    // var txtFilename = 'bumblebot/output.txt'; // Path to text file output from Processing
    // var txtParams = {
    //   encoding: 'utf8'
    // }
    // var txtBee = fs.readFileSync(txtFilename, txtParams); // Read text


    T.post('media/upload', { media_data: imgBee }, uploaded); // Upload image before tweeting

    function uploaded(err, data, response) {
      var id = data.media_id_string; // Read uploaded image
      var tweet = {
        status:     '', // Tweet text content
        media_ids:  [id] // Tweet image content
      }
      T.post('statuses/update', tweet, tweeted); // Send tweet
    }

    function tweeted(err, data, response) {
      if (err) {
        console.log('Error! Tweet not sent.');
      } else {
        console.log('Success! Tweet sent.');
      }
    }
  }
}