index.js

const gfx = require('./btn-render.js');
const streamDeck = require('elgato-stream-deck');
const _ = require('lodash');
var sys = require('util')
var exec = require('child_process').exec;

const settings = require('./configs/default.json');

var buttons = [];
var clients = [];



function ControllerButton(b) {
  var self = this;

  if (!_.isString(b.text)) {
    b.text = "";
  }

  if (_.isString(b.symbol)) {
    b.name = "help";
  }

  this.desc = b;

  this.imgLoaded = gfx.Load(b.color, b.symbol, b.text);

  this.setImage = function (state) {
    var index = state ? 1 : 0;

    this.imgLoaded.then(function(x) {
      streamDeck.fillImage(self.desc.key, x[index].data);
    });
  }

  this.sendCmd = function (state) {
    var o = state ? self.desc.cmdDown : self.desc.cmdUp;

    if (o) {
        var cmd = o[1];
        var val = o[2];

        exec(cmd, function(err, stdout, stderr) {
          console.log(stdout);
        });
        console.log("Sent", cmd, val);
    }
  }

  this.down = function () {
    self.sendCmd(true);

    self.setImage(true);
  }

  this.up = function () {
    self.sendCmd(false);

    self.setImage(false);
  }

  self.setImage(false);
}

// Clear button displays
_.forEach(_.range(0, 15), function (i) {
  streamDeck.fillColor(i, 0, 0, 0);
});

// Set up buttons from settings file
_.forEach(settings.buttons, function (b) {
  if (_.isNumber(b.key) && _.inRange(b.key, 0, 15)) {
    buttons[b.key] = new ControllerButton(b);
  }
});

// Set up Stream Deck callbacks
streamDeck.on('down', keyIndex => {
  if (buttons[keyIndex]) {
    buttons[keyIndex].down();
  }
});

streamDeck.on('up', keyIndex => {
  if (buttons[keyIndex]) {
    buttons[keyIndex].up();
  }
});

streamDeck.on('error', error => {
  console.error(error);
});