55 lines
1.4 KiB
TypeScript
55 lines
1.4 KiB
TypeScript
import * as plugins from './smarttime.plugins';
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import { CronManager } from './smarttime.classes.cronmanager';
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export type TJobFunction = (() => void) | (() => Promise<any>);
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export class CronJob {
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public croner;
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public status: 'started' | 'stopped' | 'initial' = 'initial';
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public cronExpression: string;
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public jobFunction: TJobFunction;
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private nextExecutionUnix: number = 0;
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constructor(cronManager: CronManager, cronExpressionArg: string, jobFunction: TJobFunction) {
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this.cronExpression = cronExpressionArg;
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this.jobFunction = jobFunction;
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this.croner = plugins.croner(this.cronExpression);
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}
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/**
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* checks wether the cronjob needs to be executed
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*/
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public checkExecution(): number {
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if (this.nextExecutionUnix === 0) {
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this.getNextExecutionTime();
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}
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if (Date.now() > this.nextExecutionUnix) {
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const maybePromise = this.jobFunction();
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if (maybePromise instanceof Promise) {
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maybePromise.catch(e => console.log(e));
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}
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this.nextExecutionUnix = this.getNextExecutionTime();
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}
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return this.nextExecutionUnix;
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}
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public getNextExecutionTime() {
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return this.nextExecutionUnix = Date.now() + this.getTimeToNextExecution();
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}
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/**
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* gets the time to next execution
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*/
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public getTimeToNextExecution() {
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return this.croner.msToNext();
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}
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public start() {
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this.status = 'started';
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}
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public stop() {
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this.status = 'stopped';
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}
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}
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