actionhero/initializers/logger.js

actionhero.js is a multi-transport API Server with integrated cluster capabilities and delayed tasks

'use strict'

const util = require('util')
const winston = require('winston')

module.exports = {
  loadPriority: 100,
  initialize: function (api, next) {
    let transports = []
    let i
    for (i in api.config.logger.transports) {
      let t = api.config.logger.transports[i]
      if (typeof t === 'function') {
        transports.push(t(api, winston))
      } else {
        transports.push(t)
      }
    }

    api.logger = new (winston.Logger)({transports: transports})

    if (api.config.logger.levels) {
      api.logger.setLevels(api.config.logger.levels)
    } else {
      api.logger.setLevels(winston.config.syslog.levels)
    }

    if (api.config.logger.colors) {
      winston.addColors(api.config.logger.colors)
    }

    api.log = function (message, severity, data) {
      let localizedMessage
      if (api.config.logger.localizeLogMessages === true) {
        localizedMessage = api.i18n.localize(message)
      } else if (typeof message === 'string') {
        localizedMessage = message
      } else {
        localizedMessage = util.format.apply(this, message)
      }

      if (severity === undefined || severity === null || api.logger.levels[severity] === undefined) { severity = 'info' }
      let args = [severity, localizedMessage]
      if (data !== null && data !== undefined) { args.push(data) }
      api.logger.log.apply(api.logger, args)
    }

    let logLevels = []
    for (i in api.logger.levels) { logLevels.push(i) }

    api.log('*** Starting ActionHero ***', 'notice')
    api.log('Logger loaded.  Possible levels include:', 'debug', logLevels)

    next()
  }
}