61 lines
1.2 KiB
JavaScript
61 lines
1.2 KiB
JavaScript
import {Ticker} from '@avocado/timing';
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const MAGIC_TO_FIT_HOUR_INTO_USHORT = 2730;
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export class WorldTime {
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constructor() {
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this._hour = 0;
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this.ticker = new Ticker(0.25);
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this._state = 0;
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this.ticker.on('tick', () => {
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this._state = (this._hour * MAGIC_TO_FIT_HOUR_INTO_USHORT) >> 0;
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});
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}
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static format(time) {
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const rawHour = (time + 12) % 12;
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const hour = Math.floor(0 === Math.floor(rawHour) ? 12 : rawHour);
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const minutes = String(Math.floor((rawHour - Math.floor(rawHour)) * 60)).padStart(2, '0');
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if (time >= 12) {
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return `${hour}:${minutes} pm`;
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}
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else {
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return `${hour}:${minutes} am`;
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}
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}
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get hour() {
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return this._hour;
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}
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set hour(hour) {
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this._hour = hour;
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this._state = (this._hour * MAGIC_TO_FIT_HOUR_INTO_USHORT) >> 0;
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}
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patchState(steps) {
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for (const step of steps) {
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const {path, value} = step;
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if ('/' === path) {
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this._hour = value / MAGIC_TO_FIT_HOUR_INTO_USHORT;
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}
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}
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}
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secondsPerHour() {
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return 60;
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}
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get state() {
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return this._state;
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}
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tick(elapsed) {
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this._hour += (elapsed / this.secondsPerHour());
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this._hour = this._hour % 24;
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this.ticker.tick(elapsed);
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}
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}
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