A simple logger script made with Winston package for NodeJS

logger.js

const { createLogger, format, transports } = require('winston');
const { combine, timestamp, label, printf } = format;

const config = require('./config');
const isLogsEnabled = config.enableLogs;

/**
 * Class to log in text files
 */
class Logger {

  /**
   * Create the logger instance
   */
  static logger() {
    return createLogger({
      level: 'info',
      format: combine(
        timestamp(),
        printf(({ level, message, label, timestamp }) => {
          return `${timestamp} [${level}]: ${message}`;
        }),
      ),
      defaultMeta: { service: 'user-service' },
      transports: [
        new transports.File({ filename: 'error.log', level: 'error' }),
        new transports.File({ filename: 'info.log' }),
      ],
    });
  }

  /**
   * Log an info message
   */
  static logInfo(message) {
    if (isLogsEnabled) {
      this.logger().info({ level: 'info', message: message });
    }
  }

  /**
   * Log an error message
   */
  static logError(message) {
    if (isLogsEnabled) {
      this.logger().error({ level: 'error', message: message });
    }
  }
}

module.exports = Logger;