wazuh-kibana-app/server/logger.js

const winston = require('winston');
const fs      = require('fs');
const path    = require('path');

const wazuhlogger = winston.createLogger({
    level: 'info',
    format: winston.format.json(),
    transports: [
        new winston.transports.File({ filename: path.join(__dirname, '../../error.log'), level: 'error' }),
        new winston.transports.File({ filename: path.join(__dirname, '../../combined.log') })
    ]
});

wazuhlogger.exitOnError = false;

const getFilesizeInMegaBytes = filename => {
    if (fs.existsSync(filename)) {
        const stats = fs.statSync(filename)
        const fileSizeInMegaBytes = stats.size
        return fileSizeInMegaBytes / 1000000.0;
    }
    return 0;
}

const checkFiles = () => {
    if (getFilesizeInMegaBytes(path.join(__dirname, '../../error.log')) >= 10) {
        fs.renameSync(path.join(__dirname, '../../error.log'), path.join(__dirname, `../../error.${new Date().getTime()}.log`))
    }
    if (getFilesizeInMegaBytes(path.join(__dirname, '../../combined.log')) >= 10) {
        fs.renameSync(path.join(__dirname, '../../combined.log'), path.join(__dirname, `../../combined.${new Date().getTime()}.log`))
    }
};

const log = (message, location, level) => {
    checkFiles();
    wazuhlogger.log({
        date: new Date(),
        level: level || 'error',
        location: location || 'unknown',
        message: message || 'An error occurred'
    });
};

module.exports = { log }