@m92/express-utils/src/lib/Logger/Logger.js

Utility Module for Express Framework

'use strict'

import util from 'util'
import autoBind from 'auto-bind'

import BaseLogCreator from './classes/BaseLogCreator'
import ReqResLogCreator from './classes/ReqResLogCreator'
import CodeFlowLogCreator from './classes/CodeFlowLogCreator'
import LOGGER from './constants/LOGGER'

const { LEVELS, MODES } = LOGGER

export default class Logger {
  constructor (CONFIG, CONSTANTS, thisExpressUtils) {
    this.CONFIG = CONFIG
    this.CONSTANTS = CONSTANTS

    const BaseLog = new BaseLogCreator(CONFIG, CONSTANTS, thisExpressUtils)

    this.ReqResLog = new ReqResLogCreator(BaseLog, thisExpressUtils)
    this.CodeFlowLog = new CodeFlowLogCreator(BaseLog)

    autoBind(this)

    this._setConsoleReference()
  }

  // Custom logs
  log (level, message, data) {
    const { CONFIG, CodeFlowLog } = this
    const { LOGGER_CODE_FLOW_LOG_ENABLED } = CONFIG

    if (!LOGGER_CODE_FLOW_LOG_ENABLED) { return }

    message = util.format(message)
    const codeFlowLog = new CodeFlowLog(level, message, data)
    this._dispatch(codeFlowLog)
  }

  fatal (message, data) { this.log(LEVELS.FATAL, message, data) }
  error (message, data) { this.log(LEVELS.ERROR, message, data) }
  warn (message, data) { this.log(LEVELS.WARN, message, data) }
  info (message, data) { this.log(LEVELS.INFO, message, data) }
  debug (message, data) { this.log(LEVELS.DEBUG, message, data) }
  trace (message, data) { this.log(LEVELS.TRACE, message, data) }

  _dispatch (logObject) {
    const { CONFIG } = this

    switch (CONFIG.LOGGER_MODE) {
      case MODES.CONSOLE:
        logObject.print()
        break

      case MODES.CONSOLE_VERBOSE:
        logObject.print(true)
        break
    }
  }

  // Reference to default 'console' methods
  _setConsoleReference () {
    this.consoleLog = console.log
    this.consoleError = console.error
    this.consoleWarn = console.warn
    this.consoleInfo = console.info
    this.consoleDebug = console.debug
  }

  // Handle Console logs
  _overrideConsole () {
    console.log = (...args) => this.log(LEVELS.INFO, util.format(...args))
    console.error = (...args) => this.log(LEVELS.ERROR, util.format(...args))
    console.warn = (...args) => this.log(LEVELS.WARN, util.format(...args))
    console.info = (...args) => this.log(LEVELS.INFO, util.format(...args))
    console.debug = (...args) => this.log(LEVELS.DEBUG, util.format(...args))
  }
}