audio-device-javascript.js

class AudioDevice {
  constructor () {
    this.isPlaying = false;
    this.currentTrack = null;
  }

  play (track) {
    this.currentTrack = track;
    this.isPlaying = true;
    this.handlePlayCurrentAudioTrack();
  }

  handlePlayCurrentAudioTrack () {
    throw new Error(`Subclasss responsibility error`)
  }
}

class Boombox extends AudioDevice {
  constructor () {
    super()
  }

  handlePlayCurrentAudioTrack () {
    // Play through the boombox speakers
  }
}

class IPod extends AudioDevice {
  constructor () {
    super()
  }

  handlePlayCurrentAudioTrack () {
    // Ensure headphones are plugged in
    // Play through the ipod
  }
}

const AudioDeviceType = {
  Boombox: 'Boombox',
  IPod: 'Ipod'
}

const AudioDeviceFactory = {
  create: (deviceType) => {
    switch (deviceType) {
      case AudioDeviceType.Boombox:
        return new Boombox();
      case AudioDeviceType.IPod:
        return new IPod();
      default:
        return null;
    }
  } 
}

const boombox = AudioDeviceFactory
  .create(AudioDeviceType.Boombox);

const ipod = AudioDeviceFactory
  .create(AudioDeviceType.IPod);