88 lines
2.2 KiB
TypeScript
88 lines
2.2 KiB
TypeScript
import { Hook, Manifest } from "../types.ts";
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import { Cron } from "https://cdn.jsdelivr.net/gh/hexagon/croner@4/src/croner.js";
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import { safeRun } from "../util.ts";
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import { System } from "../system.ts";
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import { timingSafeEqual } from "https://deno.land/std@0.152.0/crypto/timing_safe_equal";
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export type CronHookT = {
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cron?: string | string[];
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};
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export class CronHook implements Hook<CronHookT> {
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tasks: Cron[] = [];
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constructor(private system: System<CronHookT>) {
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}
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apply(system: System<CronHookT>): void {
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this.system = system;
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system.on({
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plugLoaded: () => {
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this.reloadCrons();
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},
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plugUnloaded: () => {
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this.reloadCrons();
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},
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});
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this.reloadCrons();
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}
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stop() {
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this.tasks.forEach((task) => task.stop());
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this.tasks = [];
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}
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reloadCrons() {
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this.stop();
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for (const plug of this.system.loadedPlugs.values()) {
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if (!plug.manifest) {
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continue;
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}
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for (
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const [name, functionDef] of Object.entries(
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plug.manifest.functions,
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)
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) {
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if (!functionDef.cron) {
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continue;
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}
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const crons = Array.isArray(functionDef.cron)
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? functionDef.cron
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: [functionDef.cron];
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for (const cronDef of crons) {
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this.tasks.push(
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new Cron(cronDef, () => {
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// console.log("Now acting on cron", cronDef);
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safeRun(async () => {
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try {
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await plug.invoke(name, [cronDef]);
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} catch (e: any) {
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console.error("Execution of cron function failed", e);
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}
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});
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}),
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);
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}
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}
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}
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}
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validateManifest(manifest: Manifest<CronHookT>): string[] {
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const errors: string[] = [];
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for (const functionDef of Object.values(manifest.functions)) {
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if (!functionDef.cron) {
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continue;
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}
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const crons = Array.isArray(functionDef.cron)
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? functionDef.cron
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: [functionDef.cron];
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for (const _cronDef of crons) {
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// if (!cron.validate(cronDef)) {
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// errors.push(`Invalid cron expression ${cronDef}`);
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// }
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}
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}
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return errors;
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}
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}
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