index.js

const colors = require('colors/safe')

const LEVEL_ICON = {
  info: 'i',
  debug: '$',
  success: 'v',
  warn: '!',
  error: 'x',
}

const LEVEL_LABEL = {
  info: 'INFO',
  debug: 'DEBUG',
  success: 'SUCCESS',
  warn: 'WARN',
  error: 'ERROR',
}

const LEVEL_COLOR = {
  info: colors.blue,
  debug: colors.cyan,
  success: colors.green,
  warn: colors.yellow,
  error: colors.red,
}

const DEFAULTS = {
  labelIcon: true,
  labelPrefix: '',
  labelSuffix: ' ',
}

module.exports = ({labelIcon, labelPrefix, labelSuffix} = DEFAULTS) => {
  const genDepth = (depth) => ''.padStart(depth * 4, ' ')

  const getLabel = (level) => {
    return (
      labelPrefix
      +
      LEVEL_COLOR[level](labelIcon ? LEVEL_ICON[level] : LEVEL_LABEL[level])
      +
      labelSuffix
    )
  }

  const log = (level, msg, depth = 0) => {
    console.log(`${getLabel(level)} ${genDepth(depth)}${msg}`)
  }

  return {
    info: (msg, depth) => {
      log('info', msg, depth)
    },
    debug: (msg, depth) => {
      log('debug', msg, depth)
    },
    success: (msg, depth) => {
      log('success', msg, depth)
    },
    warn: (msg, depth) => {
      log('warn', msg, depth)
    },
    error: (msg, depth) => {
      log('error', msg, depth)
    },
  }
}