log.js

const winston = require('winston');
const fs = require('fs');
const path = require('path');

const dir = path.resolve(__dirname, '../logs/');

if (!fs.existsSync(dir)) {
  fs.mkdirSync(dir);
}

// set default log level.
const logLevel = 'info';

// Set up logger
const customColors = {
  trace: 'white',
  debug: 'green',
  info: 'blue',
  warn: 'yellow',
  crit: 'red',
  fatal: 'red',
};

const logger = filename =>
  new winston.Logger({
    colors: customColors,
    level: logLevel,
    levels: {
      fatal: 0,
      crit: 1,
      warn: 2,
      info: 3,
      debug: 4,
      trace: 5,
    },
    transports: [
      new winston.transports.Console({
        colorize: true,
        timestamp: true,
      }),
      new winston.transports.File({ filename: `./logs/${filename}` }),
    ],
  });

winston.addColors(customColors);

// Extend logger object to properly log 'Error' types
const origLog = logger.log;

logger.log = function(level, msg) {
  if (msg instanceof Error) {
    let args = Array.prototype.slice.call(arguments);
    args[1] = msg.stack;
    origLog.apply(logger, args);
  } else {
    origLog.apply(logger, arguments);
  }
};

/*
npm install [email protected]
*/

/* LOGGER EXAMPLES
const log = require('../helpers/log.js')('somelogs');
log.trace('testing');
log.debug('testing');
log.info('testing');
log.warn('testing');
log.crit('testing');
log.fatal({ test: 'testing' });
 */

module.exports = logger;