67 lines
1.9 KiB
TypeScript
67 lines
1.9 KiB
TypeScript
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import { CronType } from "@/enums";
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import CronExpressionParser from "cron-parser";
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export function parseCron(cron: string | null): { type: CronType, value: number } {
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let value: RegExpMatchArray | null;
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if (cron === null) {
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return {
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type: CronType.ONE_TIME,
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value: 0
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}
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} else if ((value = /^0 (\d+) \* \* \*$/i.exec(cron)) !== null) {
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return {
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type: CronType.EVERY_DAY,
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value: parseInt(value[1] ?? '')
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}
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} else if ((value = /^0 0 \* \* (\d+)$/i.exec(cron)) !== null) {
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return {
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type: CronType.EVERY_WEEK,
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value: parseInt(value[1] ?? '')
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}
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} else if ((value = /^0 0 (\d+) \* \*$/i.exec(cron)) !== null) {
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return {
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type: CronType.EVERY_MONTH,
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value: parseInt(value[1] ?? '')
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}
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} else if ((value = /^0 0 1 (\d+) \*$/i.exec(cron)) !== null) {
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return {
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type: CronType.EVERY_YEAR,
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value: parseInt(value[1] ?? '')
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}
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} else {
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return {
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type: CronType.SPECIFIC,
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value: 0
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}
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}
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}
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export function getCron(type: CronType, value: number, fallback: string): string | null {
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switch(type) {
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case CronType.EVERY_DAY:
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return `0 ${value.toFixed(0)} * * *`;
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case CronType.EVERY_WEEK:
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return `0 0 * * ${value.toFixed(0)}`
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case CronType.EVERY_MONTH:
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return `0 0 ${value.toFixed(0)} * *`;
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case CronType.EVERY_YEAR:
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return `0 0 1 ${value.toFixed(0)} *`;
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case CronType.SPECIFIC:
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if (validCron(fallback)) {
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return fallback;
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}
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}
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return null;
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}
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export function validCron(cron: string): boolean {
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try {
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CronExpressionParser.parse(cron);
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return true;
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} catch {
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return false;
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}
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}
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