alarm.js

#!/usr/bin/env node
var sprintf = require('printf');
var exec = require('child_process').exec;

var alarmHour = parseInt(process.argv[2], 10);
var alarmMinute = parseInt(process.argv[3], 10);
if (isNaN(alarmHour) || alarmHour < 0 || alarmHour > 23) {
  throw new Error('invalid hour: ' + alarmHour);
}

if (isNaN(alarmMinute) || alarmMinute < 0 || alarmMinute > 59) {
  throw new Error('invalid minute: ' + alarmMinute);
}


var powerHour = alarmHour;
var powerMinute = alarmMinute;

if (powerMinute > 5) {
  powerMinute -= 5;
} else {
  powerMinute = 60 + powerMinute - 5;
  powerHour -= 1;
}

var powerCmd = sprintf(
  'pmset repeat wakeorpoweron MTWRFSU %02d:%02d:00',
  powerHour,
  powerMinute
);

exec(powerCmd, function(err) {
  if (err) {
    throw err;
  }

  console.log(sprintf('Set alarm for %02d:%02d', alarmHour, alarmMinute));
  console.log(sprintf('Set wakup for %02d:%02d', powerHour, powerMinute));

  process.setuid('felix');
});

var file = '/Volumes/HDD/Music/iTunes/iTunes\ Music/Donovan/Donovan\'s\ Greatest\ Hits/08\ Colours.mp3';

var spawn = require('child_process').spawn;
var async = require('async');
var vlcPath = '/Applications/VLC.app/Contents/MacOS/VLC';

var interval = setInterval(function() {
  var now = new Date;
  var hour = now.getHours();
  var minute = now.getMinutes();

  if (hour == alarmHour && minute == alarmMinute) {
    console.log(sprintf('Set alarm for %02d:%02d', alarmHour, alarmMinute));
    play(file);
    clearInterval(interval);
  }

}, 1000);

function play(file) {
  console.log('playing', file);

  var vlc = spawn(vlcPath, [
    '-R',
    '--sout=#transcode {acodec = alac channels = 2, samplerate = 44100}: raop{host=10.0.1.13,volume=255}',
    file
  ]);

  vlc.stdout.setEncoding('utf8');
  vlc.stderr.setEncoding('utf8');
  async.log(vlc.stdout.on.bind(vlc.stdout), 'data');
  async.log(vlc.stderr.on.bind(vlc.stderr), 'data');

  vlc.on('exit', function() {
    console.log('vlc exit', arguments);
  });
}