@pushrocks/smarttime
Version:
handle time in smart ways
54 lines • 3.6 kB
JavaScript
import * as plugins from './smarttime.plugins.js';
import { TimeStamp } from './smarttime.classes.timestamp.js';
export class Timer {
get timeLeft() {
return this.timeInMilliseconds - this.pausedAt.change;
}
constructor(timeInMillisecondsArg) {
/**
* the state of the timer
*/
this.state = 'initiated';
// a deferred triggeted when Timer has completed
this.completedDeferred = plugins.smartpromise.defer();
this.timeInMilliseconds = timeInMillisecondsArg;
this.completed = this.completedDeferred.promise;
}
/**
* starts the timer
*/
start() {
if (!this.startedAt) {
this.currentTimeout = setTimeout(() => {
this.completedDeferred.resolve();
}, this.timeInMilliseconds);
this.startedAt = new TimeStamp();
}
else {
throw new Error('timer has been started before. Please use resume instead');
}
}
pause() {
if (this.startedAt) {
clearTimeout(this.currentTimeout);
this.currentTimeout = null;
this.pausedAt = TimeStamp.fromTimeStamp(this.startedAt);
}
}
resume() {
if (this.startedAt) {
this.currentTimeout = setTimeout(() => {
this.completedDeferred.resolve();
}, this.timeLeft);
}
else {
throw new Error('timer has NOT been started before. Please use .start() instead');
}
}
reset() {
this.pause();
this.startedAt = null;
this.pausedAt = null;
}
}
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