Custom logger made with Wiston for Discord Bots

Logger.js

const { createLogger, format, transports, addColors } = require('winston');
const { combine } = format;

// Levels
const customLevels = {
  levels: {
    error: 0,
    warn: 1,
    client: 2,
    info: 3,
    debug: 4,
    trace: 5
  },
  colors: {
    error: 'bold red',
    warn: 'bold yellow',
    client: 'bold magenta',
    info: 'bold blue',
    debug: 'bold gray',
    trace: 'bold gray'
  }
}

// Colors
addColors(customLevels.colors);

// Logger setup
const logger = new createLogger({
  level: 'info',
  levels: customLevels.levels,

  // Transports
  transports: [
    
    // Console transport
    new transports.Console({
      format: combine(
        format(info => ({ ...info, level: `[${info.level.toUpperCase()}]` }))(),
        format.colorize(),
        format.errors({ stack: true }),
        format.prettyPrint(),
        format.simple(),
        format.splat(),
        format.timestamp({ format: "YYYY-MM-DD HH:mm:ss A" }),
        format.printf(
          ({ timestamp, level, message }) => `[${timestamp}] ${level} - ${message}`
        )
      )
    }),
    
    // File transport.
    // Absolutely not necessary as you would be wanting to restart your bot a lot when making changes.
    new transports.File({
      filename: `${__dirname}/../../logs/aelis.log`,
      format: combine(
        format.timestamp({ format: 'DD-MM-YYYY hh:mm:ss' }),
        format.printf(info => { return `[${info.timestamp}] [${info.level}] - ${info.message}` })
      )
    }),
    
    new transports.File({
      filename: `${__dirname}/../../logs/aelis_errors.log`,
      level: 'error',
      format: combine(
        format.timestamp({ format: 'DD-MM-YYYY hh:mm:ss' }),
        format.printf(info => { return `[${info.timestamp}] [${info.level}] - ${info.message}` })
      )
    })
  ]
});

module.exports = logger;