cherry-spotify/index.js

Spotify plugin for cherry home automation via spop

var net = require("net");

/**
 * Spop specific log function
 */
function log() {
  Array.prototype.unshift.call(arguments, "[cherry-spotify]");
  console.log.apply(console, arguments);
}

module.exports = function (ec) {
  var ip = ec.config.spop_ip;
  var port = ec.config.spop_port;

  var socket;
  function tcp_connect () {
    if (typeof socket !== "undefined") {
      socket.destroy();
    }

    socket = new net.Socket();

    socket.on('error', function (err) {
      log('socket error, trying to reconnect', err);
      tcp_connect();
    });

    socket.on('connect', function() {
      log("connected to spop daemon");
    });

    var buffer = "";
    var once = false;
    socket.on('data', function (data) {
      var text = data.toString('utf8');
      buffer += text;

      if (text[text.length - 1] === '\n') {
        var message = buffer.trim();

        // empty the buffer for the next message
        buffer = "";

        if (!once) {
          // first message from Spop, should be the version number
          log(message);
          once = true;
        } else {
          try {
            var obj = JSON.parse(message);
            ec.produce({from: 'spop', body: obj});
          } catch (err) {
            log('caught', err, message);
          }
        }
      }
    });

    socket.connect(port, ip);
  }

  tcp_connect();

  ec.register('spop', function (cmd) {
    socket.write(cmd + '\n');
  });
}