111 lines
2.8 KiB
TypeScript
111 lines
2.8 KiB
TypeScript
/*
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* SPDX-FileCopyrightText: hazelnoot and other Sharkey contributors
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import { Injectable } from '@nestjs/common';
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import { TimeService, Timer } from '@/core/TimeService.js';
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import { addPatch, type DatePatch } from '@/misc/patch-date.js';
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/**
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* Fake implementation of TimeService that allows manual control of time.
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* When this service is used, the flow of time is fully stopped.
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*
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* Test cases can manually adjust the "now" parameter to move time forwards and backwards.
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* When moving forward, timers (interval and timeout) will automatically fire as appropriate.
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*/
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@Injectable()
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export class GodOfTimeService extends TimeService<GodsOwnTimer> {
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private _now = 0;
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constructor() {
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super();
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}
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/**
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* Get or set the current time, in milliseconds since the unix epoch.
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*/
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public get now() {
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return this._now;
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}
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public set now(value: number) {
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// Moving backwards is allowed, for now.
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if (value > this._now) {
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// Fire all expiring timers in chronological order.
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const expiringTimers = this.timers
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.values()
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.filter(t => t.expiresAt >= value)
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.toArray()
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.sort((a, b) => a.expiresAt - b.expiresAt);
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// Since we sorted the list, this will progressively increase "now" as we handle later and later events.
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for (const timer of expiringTimers) {
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// When the timer fires, "now" should equal the time that was originally waited for.
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this._now = timer.expiresAt;
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// Cleanup first in case timer throws an exception.
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this.timers.delete(timer.timerId);
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timer.callback();
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}
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}
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// Bump up to the final target value
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this._now = value;
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}
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/**
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* Get or set the current time, as a JavaScript Date object.
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*/
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get date(): Date {
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return super.date;
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}
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set date(value: Date) {
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this.now = value.getTime();
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}
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/**
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* Moves time by a relative "tick" amount.
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* Ticks can be a raw number of milliseconds, or an inline object containing time and/or date increments.
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*/
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public tick(tick: number | DatePatch) {
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if (typeof(tick) === 'number') {
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this.now += tick;
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} else {
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this.date = addPatch(this.date, tick);
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}
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}
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/**
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* Clears all timers and resets to time=0.
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*/
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public reset() {
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this.resetTo(0);
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}
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/**
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* Clears all timers and resets to the real-world time.
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*/
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public resetToNow() {
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this.resetTo(Date.now());
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}
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/**
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* Clears all timers and resets to a given time.
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*/
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public resetTo(to: number) {
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this.timers.clear();
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this.now = to;
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}
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protected startNativeTimer(timerId: symbol, repeating: boolean, callback: () => void, delay: number): GodsOwnTimer {
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const expiresAt = this.now + delay;
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return { timerId, repeating, delay, expiresAt, callback };
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}
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protected stopNativeTimer(): void {
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// no-op - fake timers have no side effects to clean up
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}
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}
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export interface GodsOwnTimer extends Timer {
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expiresAt: number;
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}
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