const fs = require('fs');

const path = require('path');

const cron = require('node-cron');

// Configuration

const sourceDirectory = './source'; // Directory to backup from

const backupDirectory = './backup'; // Directory to backup to

const maxFileSize = 1024 * 1024 * 10; // 10MB limit per file

const maxFiles = 5; // Limit to 5 files per run

const backupInterval = '0 0 * * *'; // Daily at midnight (Cron expression)

/**

* Backs up text files from a source directory to a backup directory.

*/

async function backupFiles() {

try {

const files = fs.readdirSync(sourceDirectory);

let backedUpCount = 0;

for (const file of files) {

const filePath = path.join(sourceDirectory, file);

const stat = fs.statSync(filePath);

if (stat.isFile() && file.endsWith('.txt')) {

if (stat.size > maxFileSize) {

console.log(`Skipping ${file} - exceeds size limit (${maxFileSize} bytes).`);

continue;

}

try {

const fileContent = fs.readFileSync(filePath, 'utf8');

const backupFilePath = path.join(backupDirectory, file);

fs.writeFileSync(backupFilePath, fileContent, 'utf8');

backedUpCount++;

console.log(`Backed up ${file} to ${backupFilePath}`);

} catch (err) {

console.error(`Error backing up ${file}: ${err}`);

}

}

}

console.log(`Backup completed. ${backedUpCount} files backed up.`);

} catch (err) {

console.error(`Error during backup process: ${err}`);

}

}

/**

* Schedules the backup task using cron.

*/

function scheduleBackup() {

cron.schedule(backupInterval, () => {

console.log('Running scheduled backup...');

backupFiles();

});

}

// Run the scheduler

scheduleBackup();