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timer.js
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timer.js
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import globalState from '../globalState.js'
import { animateTimerProgressBar, stopTimerProgressBar } from '../utils/dom/domUtils.js'
/**
* If `timer` parameter is set, returns number of milliseconds of timer remained.
* Otherwise, returns undefined.
*
* @returns {number | undefined}
*/
export const getTimerLeft = () => {
return globalState.timeout && globalState.timeout.getTimerLeft()
}
/**
* Stop timer. Returns number of milliseconds of timer remained.
* If `timer` parameter isn't set, returns undefined.
*
* @returns {number | undefined}
*/
export const stopTimer = () => {
if (globalState.timeout) {
stopTimerProgressBar()
return globalState.timeout.stop()
}
}
/**
* Resume timer. Returns number of milliseconds of timer remained.
* If `timer` parameter isn't set, returns undefined.
*
* @returns {number | undefined}
*/
export const resumeTimer = () => {
if (globalState.timeout) {
const remaining = globalState.timeout.start()
animateTimerProgressBar(remaining)
return remaining
}
}
/**
* Resume timer. Returns number of milliseconds of timer remained.
* If `timer` parameter isn't set, returns undefined.
*
* @returns {number | undefined}
*/
export const toggleTimer = () => {
const timer = globalState.timeout
return timer && (timer.running ? stopTimer() : resumeTimer())
}
/**
* Increase timer. Returns number of milliseconds of an updated timer.
* If `timer` parameter isn't set, returns undefined.
*
* @param {number} ms
* @returns {number | undefined}
*/
export const increaseTimer = (ms) => {
if (globalState.timeout) {
const remaining = globalState.timeout.increase(ms)
animateTimerProgressBar(remaining, true)
return remaining
}
}
/**
* Check if timer is running. Returns true if timer is running
* or false if timer is paused or stopped.
* If `timer` parameter isn't set, returns undefined
*
* @returns {boolean}
*/
export const isTimerRunning = () => {
return !!(globalState.timeout && globalState.timeout.isRunning())
}