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// ===========================================
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// REQUARKS WIKI - Background Agent
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// 1.0.0
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// Licensed under AGPLv3
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// ===========================================
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global.PROCNAME = 'AGENT';
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global.ROOTPATH = __dirname;
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global.IS_DEBUG = process.env.NODE_ENV === 'development';
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if(IS_DEBUG) {
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global.CORE_PATH = ROOTPATH + '/../core/';
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} else {
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global.CORE_PATH = ROOTPATH + '/node_modules/requarks-core/';
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}
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// ----------------------------------------
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// Load Winston
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// ----------------------------------------
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global.winston = require(CORE_PATH + 'core-libs/winston')(IS_DEBUG);
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// ----------------------------------------
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// Load global modules
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// ----------------------------------------
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winston.info('[AGENT] Background Agent is initializing...');
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var appconfig = require(CORE_PATH + 'core-libs/config')('./config.yml');
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global.db = require(CORE_PATH + 'core-libs/mongodb').init(appconfig);
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global.upl = require('./libs/uploads-agent').init(appconfig);
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global.git = require('./libs/git').init(appconfig);
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global.entries = require('./libs/entries').init(appconfig);
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global.mark = require('./libs/markdown');
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// ----------------------------------------
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// Load modules
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// ----------------------------------------
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var _ = require('lodash');
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var moment = require('moment');
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var Promise = require('bluebird');
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var fs = Promise.promisifyAll(require("fs-extra"));
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var path = require('path');
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var cron = require('cron').CronJob;
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// ----------------------------------------
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// Start Cron
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// ----------------------------------------
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var jobIsBusy = false;
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var jobUplWatchStarted = false;
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var job = new cron({
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cronTime: '0 */5 * * * *',
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onTick: () => {
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// Make sure we don't start two concurrent jobs
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if(jobIsBusy) {
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winston.warn('[AGENT] Previous job has not completed gracefully or is still running! Skipping for now. (This is not normal, you should investigate)');
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return;
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}
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winston.info('[AGENT] Running all jobs...');
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jobIsBusy = true;
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// Prepare async job collector
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let jobs = [];
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let repoPath = path.resolve(ROOTPATH, appconfig.paths.repo);
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let dataPath = path.resolve(ROOTPATH, appconfig.paths.data);
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let uploadsPath = path.join(repoPath, 'uploads');
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let uploadsTempPath = path.join(dataPath, 'temp-upload');
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// ----------------------------------------
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// REGULAR JOBS
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// ----------------------------------------
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//*****************************************
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//-> Sync with Git remote
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//*****************************************
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jobs.push(git.onReady.then(() => {
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return git.resync().then(() => {
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//-> Stream all documents
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let cacheJobs = [];
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let jobCbStreamDocs_resolve = null,
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jobCbStreamDocs = new Promise((resolve, reject) => {
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jobCbStreamDocs_resolve = resolve;
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});
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fs.walk(repoPath).on('data', function (item) {
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if(path.extname(item.path) === '.md' && path.basename(item.path) !== 'README.md') {
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let entryPath = entries.parsePath(entries.getEntryPathFromFullPath(item.path));
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let cachePath = entries.getCachePath(entryPath);
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//-> Purge outdated cache
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cacheJobs.push(
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fs.statAsync(cachePath).then((st) => {
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return moment(st.mtime).isBefore(item.stats.mtime) ? 'expired' : 'active';
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}).catch((err) => {
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return (err.code !== 'EEXIST') ? err : 'new';
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}).then((fileStatus) => {
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//-> Delete expired cache file
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if(fileStatus === 'expired') {
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return fs.unlinkAsync(cachePath).return(fileStatus);
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}
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return fileStatus;
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}).then((fileStatus) => {
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//-> Update cache and search index
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if(fileStatus !== 'active') {
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return entries.updateCache(entryPath);
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}
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return true;
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})
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);
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}
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}).on('end', () => {
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jobCbStreamDocs_resolve(Promise.all(cacheJobs));
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});
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return jobCbStreamDocs;
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});
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}));
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//*****************************************
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//-> Clear failed temporary upload files
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//*****************************************
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jobs.push(
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fs.readdirAsync(uploadsTempPath).then((ls) => {
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let fifteenAgo = moment().subtract(15, 'minutes');
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return Promise.map(ls, (f) => {
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return fs.statAsync(path.join(uploadsTempPath, f)).then((s) => { return { filename: f, stat: s }; });
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}).filter((s) => { return s.stat.isFile(); }).then((arrFiles) => {
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return Promise.map(arrFiles, (f) => {
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if(moment(f.stat.ctime).isBefore(fifteenAgo, 'minute')) {
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return fs.unlinkAsync(path.join(uploadsTempPath, f.filename));
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} else {
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return true;
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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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// Run
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// ----------------------------------------
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Promise.all(jobs).then(() => {
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winston.info('[AGENT] All jobs completed successfully! Going to sleep for now.');
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if(!jobUplWatchStarted) {
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jobUplWatchStarted = true;
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upl.initialScan().then(() => {
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job.start();
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});
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}
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return true;
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}).catch((err) => {
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winston.error('[AGENT] One or more jobs have failed: ', err);
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}).finally(() => {
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jobIsBusy = false;
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});
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},
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start: false,
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timeZone: 'UTC',
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runOnInit: true
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});
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// ----------------------------------------
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// Shutdown gracefully
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// ----------------------------------------
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process.on('disconnect', () => {
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winston.warn('[AGENT] Lost connection to main server. Exiting...');
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job.stop();
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process.exit();
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});
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process.on('exit', () => {
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job.stop();
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});
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