logger.js

const { createLogger, format, transports } = require('winston');
const path = require('path');
const logDir = "logs";

const logger = caller => {
    return createLogger(
        {
            transports: [
                new transports.Console({level: "debug", colorize: true}),
                new transports.File({
                    filename: path.join(logDir, "output.log"),
                    level: "debug"
                }),
                new transports.File({
                    filename: path.join(logDir, "error.log"),
                    level: "error"
                })
            ],
            format: format.combine(
                format.label({label: path.basename(caller)}),
                format.timestamp({format: "YYYY-MM-DD HH:mm:ss"}),
                format.printf(info => `[${info.timestamp}] [${info.label}] [${info.level}]: ${info.message}`)
            )
        });
};

module.exports = logger;