Node.js WInston logger

logger.js

const winston = require("winston");
const winstonDaily = require("winston-daily-rotate-file");
const appRoot = require("app-root-path");
const { createLogger } = require("winston");

const logDir = `${appRoot}/logs`;

const { combine, timestamp, label, printf } = winston.format;

const logFormat = printf(({ level, message, label, timestamp }) => {
  return `${timestamp} [${label}] ${level}: ${message}`;
});

const datePattern = "YYYY-MM-DD";
const filename = "%DATE%.log";
const maxSize = "20m";
const maxFiles = "3d";

const logger = createLogger({
  format: combine(
    label({ label: "CAPTION_EXTRACTOR" }),
    timestamp({ format: "YYYY-MM-DD HH:mm:ss" }),
    logFormat
  ),
  transports: [
    new winstonDaily({
      level: "info",
      datePattern: datePattern,
      dirname: logDir,
      filename: filename,
      maxSize: maxSize,
      maxFiles: maxFiles,
    }),
    new winstonDaily({
      level: "error",
      datePattern: datePattern,
      dirname: logDir,
      filename: filename,
      maxSize: maxSize,
      maxFiles: maxFiles,
    }),
  ],
});

module.exports = logger;