@kitapp-developers/mongo-import-export/dist/utils/logger.js

A modern CLI tool to import/export MongoDB collections to and from JSON or CSV — great for backups, migrations, and local development.

import * as winston from 'winston';
import { config } from '../config.js';
import Transport from 'winston-transport';
class MemoryTransport extends Transport {
    constructor(opts) {
        super(opts);
        this.logBuffer = [];
    }
    log(info, callback) {
        setImmediate(() => {
            this.emit('logged', info);
        });
        const { level, message, timestamp } = info;
        this.logBuffer.push({ level, message, timestamp });
        callback();
    }
    flush() {
        const consoleTransport = new winston.transports.Console({
            format: winston.format.printf(({ level, message, timestamp }) => {
                return `${timestamp} [${level.toUpperCase()}]: ${message}`;
            })
        });
        console.log('\n--- Operation Logs ---');
        this.logBuffer.forEach(logEntry => {
            const tempLogger = winston.createLogger({
                levels: winston.config.npm.levels,
                transports: [consoleTransport]
            });
            tempLogger.log(logEntry.level, logEntry.message, { timestamp: logEntry.timestamp });
            tempLogger.close();
        });
        console.log('----------------------\n');
        this.logBuffer = [];
    }
}
const memoryTransport = new MemoryTransport();
export const logger = winston.createLogger({
    level: config.logger.level,
    format: winston.format.combine(winston.format.timestamp(), winston.format.json()),
    transports: [
        memoryTransport,
        new winston.transports.File({ filename: config.logger.file }),
    ],
});
export function flushLogs() {
    memoryTransport.flush();
}