const winston = require('winston');


class LoggerUtil {
    logger;

    constructor(uuid) {
        this.logger = winston.createLogger({
            level: 'info',
            format: winston.format.combine(
                winston.format.timestamp(),
                winston.format.json(),
                winston.format.printf(({timestamp, level, message}) => {
                    if (uuid != null) {
                        return `${timestamp} (traceId=${uuid}) [${level}]: ${message}`;
                    }
                    return `${timestamp} [${level}]: ${message}`;
                })
            ),
            transports: [
                new winston.transports.Console(), // 控制台输出
                // new winston.transports.File({filename: 'combined.log'}) // 文件输出
            ],
        });
    }
}

module.exports = LoggerUtil


//

// let {logger} = new LoggerUtil('123123123');
//
// logger.info('123')