79 lines
1.5 KiB
JavaScript
79 lines
1.5 KiB
JavaScript
import Service from '@ember/service';
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import { tracked } from '@glimmer/tracking';
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import { getOwner } from '@ember/application';
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import { next } from '@ember/runloop';
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export default class ClockTickService extends Service {
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// =attributes
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/**
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* The current datetime. This is updated once every `interval` while the
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* service is running (1s by default).
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* @type {number}
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*/
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@tracked now = Date.now();
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/**
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* The frequency to update `now`, in milliseconds.
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* @type {number}
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*/
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frequency = 1000;
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/**
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* The timer interval ID
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*/
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#timer;
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/**
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* This service is enabled only in non-test environments.
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* @type {boolean}
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*/
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get enabled() {
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const config = getOwner(this).resolveRegistration('config:environment');
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return config.environment !== 'test';
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}
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// =methods
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/**
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* Starts the timer, if enabled.
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*/
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constructor() {
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super(...arguments);
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if (this.enabled) this._start();
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}
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/**
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* Stops the timer.
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*/
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willDestroy() {
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super.willDestroy(...arguments);
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this._stop();
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}
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/**
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* Sets up the timer interval, calling `_tick()` every
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* `frequency` milliseconds.
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*/
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_start() {
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const self = this;
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this.#timer = setInterval(function () {
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self._tick();
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}, this.frequency);
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}
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/**
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* Clears the timer interval.
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*/
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_stop() {
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clearInterval(this.#timer);
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}
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/**
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* Updates the value of `now` within the next runloop.
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*/
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_tick() {
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next(() => (this.now = Date.now()));
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}
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}
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