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95 lines
2.6 KiB
95 lines
2.6 KiB
// reeeper/cron/expire-announcements.js
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// Copyright (C) 2022 DTP Technologies, LLC
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// License: Apache-2.0
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'use strict';
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const path = require('path');
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const moment = require('moment');
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const mongoose = require('mongoose');
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const Announcement = mongoose.model('Announcement');
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const { CronJob } = require('cron');
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const { SiteWorkerProcess } = require(path.join(__dirname, '..', '..', '..', '..', 'lib', 'site-lib'));
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/**
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* Announcements used to auto-expire from the MongoDB database after 21 days,
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* but then I added commenting. Now, an auto-expiring Announcement would orphan
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* all those comments. That's bad.
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*
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* The solution, therefore, is to have a cron that wakes up daily and expires
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* all Announcements older than 21 days. Same policy, it just also cleans up
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* the comments and whatever else gets bolted onto an Announcement over time.
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*
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* This is how you do that.
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*/
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class ExpiredAnnouncementsCron extends SiteWorkerProcess {
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static get COMPONENT ( ) {
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return {
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logId: 'expired-announcements-cron',
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index: 'expiredAnnouncementsCron',
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className: 'ExpiredAnnouncementsCron',
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};
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}
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constructor (worker) {
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super(worker, ExpiredAnnouncementsCron.COMPONENT);
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}
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async start ( ) {
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await super.start();
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this.log.info('performing startup expiration of announcements');
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await this.expireAnnouncements();
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this.log.info('starting daily cron to expire announcements');
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this.job = new CronJob(
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'0 0 0 * * *', // at midnight every day
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this.expireAnnouncements.bind(this),
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null,
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true,
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process.env.DTP_CRON_TIMEZONE || 'America/New_York',
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);
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}
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async stop ( ) {
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if (this.job) {
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this.log.info('stopping announcement expire job');
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this.job.stop();
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delete this.job;
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}
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await super.stop();
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}
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async expireAnnouncements ( ) {
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const { announcement: announcementService } = this.dtp.services;
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const NOW = new Date();
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const OLDEST_DATE = moment(NOW).subtract(21, 'days').toDate();
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try {
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await Announcement
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.find({ created: { $lt: OLDEST_DATE } })
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.lean()
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.cursor()
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.eachAsync(async (announcement) => {
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try {
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await announcementService.remove(announcement);
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} catch (error) {
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this.log.error('failed to remove expired Announcement', {
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announcementId: announcement._id,
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error,
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});
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// fall through, we'll get it in a future run
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}
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});
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} catch (error) {
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this.log.error('failed to expire crashed hosts', { error });
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}
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}
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}
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module.exports = ExpiredAnnouncementsCron; |