wikijs-fork/agent.js
2017-04-02 19:56:47 -04:00

197 lines
5.8 KiB
JavaScript

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