desktop/sources/scripts/clock.js


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'use strict'

class Clock {
  constructor (bpm, callback) {
    this.bpm = 0
    this.callback = () => {}
    this.timer = null
    this.running = false
    this.setBpm(bpm)
  }

  setCallback (callback) {
    this.callback = callback
  }

  canSetBpm () {
    return true
  }

  getBpm () {
    return this.bpm
  }

  setBpm (bpm) {
    this.bpm = bpm
    this.reset()
  }

  reset () {
    if (this.timer) {
      clearInterval(this.timer)
    }

    if (this.running) {
      this.timer = setInterval(() => { this.callback() }, (60000 / this.bpm) / 4)
    }
  }

  setRunning (running) {
    this.running = running
    this.reset()
  }

  start () {
    this.setRunning(true)
  }

  stop () {
    this.setRunning(false)
  }

  toString () {
    return `${this.bpm}`
  }
}

module.exports = Clock