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// Native
const EventEmitter = require('events')
// Packages
const io = require('socket.io-client')
const chalk = require('chalk')
const { compare, deserialize } = require('./logs')
module.exports = class Logger extends EventEmitter {
constructor(host, token, { debug = false, quiet = false } = {}) {
super()
this.host = host
this.token = token
this.debug = debug
this.quiet = quiet
// ReadyState
this.building = false
this.socket = io(`https://io.now.sh/states?host=${host}&v=2`)
this.socket.once('error', this.onSocketError.bind(this))
this.socket.on('auth', this.onAuth.bind(this))
this.socket.on('state', this.onState.bind(this))
this.socket.on('logs', this.onLog.bind(this))
this.socket.on('backend', this.onComplete.bind(this))
// Log buffer
this.buf = []
this.printed = new Set()
}
onAuth(callback) {
if (this.debug) {
console.log('> [debug] authenticate')
}
callback(this.token)
}
onState(state) {
// Console.log(state)
if (!state.id) {
console.error('> Deployment not found')
this.emit('error')
return
}
if (state.error) {
this.emit('error', state)
return
}
if (state.backend) {
this.onComplete()
return
}
if (state.logs) {
state.logs.forEach(this.onLog, this)
}
}
onLog(log) {
if (!this.building) {
if (!this.quiet) {
console.log('> Building')
}
this.building = true
}
if (this.quiet) {
return
}
log = deserialize(log)
const timer = setTimeout(() => {
this.buf.sort((a, b) => compare(a.log, b.log))
const idx = this.buf.findIndex(b => b.log.id === log.id) + 1
for (const b of this.buf.slice(0, idx)) {
clearTimeout(b.timer)
this.printLog(b.log)
}
this.buf = this.buf.slice(idx)
}, 500)
this.buf.push({ log, timer })
}
onComplete() {
this.socket.disconnect()
if (this.building) {
this.building = false
}
this.buf.sort((a, b) => compare(a.log, b.log))
// Flush all buffer
for (const b of this.buf) {
clearTimeout(b.timer)
this.printLog(b.log)
}
this.buf = []
this.emit('close')
}
onSocketError(err) {
if (this.debug) {
console.log(`> [debug] Socket error ${err}\n${err.stack}`)
}
}
printLog(log) {
if (this.printed.has(log.id)) return
this.printed.add(log.id)
const data = log.object ? JSON.stringify(log.object) : log.text
if (log.type === 'command') {
console.log(`${chalk.gray('>')}${data}`)
} else if (log.type === 'stderr') {
data.split('\n').forEach(v => {
if (v.length > 0) {
console.error(chalk.gray(`> ${v}`))
}
})
} else if (log.type === 'stdout') {
data.split('\n').forEach(v => {
if (v.length > 0) {
console.log(`${chalk.gray('>')} ${v}`)
}
})
}
}
}