@bbc/spartacus/lib/utilities/loggers/logger.node.js

SPArtacus

'use strict';

// Node.js logger utilities using winston
var fs = require('fs');
var path = require('path');

var _require = require('winston'),
    createLogger = _require.createLogger,
    format = _require.format,
    transports = _require.transports;

var combine = format.combine,
    label = format.label,
    printf = format.printf,
    simple = format.simple,
    timestamp = format.timestamp;


var LOG_LEVEL = process.env.LOG_LEVEL || 'info';
var LOG_FILE = 'app.log';
var LOG_DIR = process.env.LOG_DIR || 'log';

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

var logLocation = path.join(LOG_DIR, LOG_FILE);

// prettier-ignore
var fileTransport = new transports.File({
  filename: logLocation,
  handleExceptions: true,
  humanReadableUnhandledException: true,
  json: true,
  level: LOG_LEVEL,
  maxFiles: 1,
  maxsize: 104857600 // 100MB
});

// prettier-ignore
var consoleTransport = new transports.Console({
  handleExceptions: true,
  humanReadableUnhandledException: true,
  level: LOG_LEVEL,
  timestamp: true
});

var customFormatting = printf(function (data) {
  return data.timestamp + ' ' + data.level + ' [' + data.label + '] ' + data.message;
});

// e.g. outputs 'Article/index.jsx'
var folderAndFilename = function folderAndFilename(name) {
  var fileparts = name.split(path.sep);
  return fileparts.splice(-2).join(path.sep);
};

var logger = function logger(callingFile) {
  return createLogger({
    format: combine(label({ label: folderAndFilename(callingFile) }), simple(), timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }), customFormatting),
    transports: [fileTransport, consoleTransport]
  });
};

module.exports = logger;