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// Thanks http://tostring.it/2014/06/23/advanced-logging-with-nodejs/
import { mkdirpSync } from 'fs-extra'
import * as path from 'path'
import * as winston from 'winston'
import { FileTransportOptions } from 'winston/lib/winston/transports'
import { CONFIG } from '../initializers/config'
import { omit } from 'lodash'
import { LOG_FILENAME } from '../initializers/constants'
const label = CONFIG.WEBSERVER.HOSTNAME + ':' + CONFIG.WEBSERVER.PORT
// Create the directory if it does not exist
// FIXME: use async
mkdirpSync(CONFIG.STORAGE.LOG_DIR)
function getLoggerReplacer () {
const seen = new WeakSet()
// Thanks: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Cyclic_object_value#Examples
return (key: string, value: any) => {
if (key === 'cert') return 'Replaced by the logger to avoid large log message'
if (typeof value === 'object' && value !== null) {
if (seen.has(value)) return
seen.add(value)
}
if (value instanceof Error) {
const error = {}
Object.getOwnPropertyNames(value).forEach(key => { error[key] = value[key] })
return error
}
return value
}
}
const consoleLoggerFormat = winston.format.printf(info => {
const obj = omit(info, 'label', 'timestamp', 'level', 'message')
let additionalInfos = JSON.stringify(obj, getLoggerReplacer(), 2)
if (additionalInfos === undefined || additionalInfos === '{}') additionalInfos = ''
else additionalInfos = ' ' + additionalInfos
return `[${info.label}] ${info.timestamp} ${info.level}: ${info.message}${additionalInfos}`
})
const jsonLoggerFormat = winston.format.printf(info => {
return JSON.stringify(info, getLoggerReplacer())
})
const timestampFormatter = winston.format.timestamp({
format: 'YYYY-MM-DD HH:mm:ss.SSS'
})
const labelFormatter = (suffix?: string) => {
return winston.format.label({
label: suffix ? `${label} ${suffix}` : label
})
}
const fileLoggerOptions: FileTransportOptions = {
filename: path.join(CONFIG.STORAGE.LOG_DIR, LOG_FILENAME),
handleExceptions: true,
format: winston.format.combine(
winston.format.timestamp(),
jsonLoggerFormat
)
}
if (CONFIG.LOG.ROTATION.ENABLED) {
fileLoggerOptions.maxsize = CONFIG.LOG.ROTATION.MAX_FILE_SIZE
fileLoggerOptions.maxFiles = CONFIG.LOG.ROTATION.MAX_FILES
}
const logger = buildLogger()
function buildLogger (labelSuffix?: string) {
return winston.createLogger({
level: CONFIG.LOG.LEVEL,
format: winston.format.combine(
labelFormatter(labelSuffix),
winston.format.splat()
),
transports: [
new winston.transports.File(fileLoggerOptions),
new winston.transports.Console({
handleExceptions: true,
format: winston.format.combine(
timestampFormatter,
winston.format.colorize(),
consoleLoggerFormat
)
})
],
exitOnError: true
})
}
function bunyanLogFactory (level: string) {
return function () {
let meta = null
let args: any[] = []
args.concat(arguments)
if (arguments[0] instanceof Error) {
meta = arguments[0].toString()
args = Array.prototype.slice.call(arguments, 1)
args.push(meta)
} else if (typeof (args[0]) !== 'string') {
meta = arguments[0]
args = Array.prototype.slice.call(arguments, 1)
args.push(meta)
}
logger[level].apply(logger, args)
}
}
const bunyanLogger = {
trace: bunyanLogFactory('debug'),
debug: bunyanLogFactory('debug'),
info: bunyanLogFactory('info'),
warn: bunyanLogFactory('warn'),
error: bunyanLogFactory('error'),
fatal: bunyanLogFactory('error')
}
// ---------------------------------------------------------------------------
export {
buildLogger,
timestampFormatter,
labelFormatter,
consoleLoggerFormat,
jsonLoggerFormat,
logger,
bunyanLogger
}
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