1. const fs = require('fs');
  2. const path = require('path');
  3. const { exec } = require('child_process');
  4. const schedule = require('node-schedule');
  6. /**
  7. * Backs up files containing strings.
  8. * @param {string[]} filePaths Array of file paths to backup.
  9. * @param {string} backupDir Directory to store backups.
  10. * @param {object} options Backup options.
  11. * @param {number} options.retries Number of retry attempts.
  12. * @param {number} options.retryDelay Delay between retries in milliseconds.
  13. */
  14. function backupFiles(filePaths, backupDir, options = {}) {
  15. const retries = options.retries || 3;
  16. const retryDelay = options.retryDelay || 5000;
  18. if (!fs.existsSync(backupDir)) {
  19. fs.mkdirSync(backupDir, { recursive: true });
  20. }
  22. async function backupFile(filePath) {
  23. for (let attempt = 0; attempt < retries; attempt++) {
  24. try {
  25. const fileName = path.basename(filePath);
  26. const backupFilePath = path.join(backupDir, `backup_${fileName}_${Date.now()}.txt`);
  28. // Read the file content
  29. const fileContent = fs.readFileSync(filePath, 'utf8');
  31. // Write the content to the backup file
  32. fs.writeFileSync(backupFilePath, fileContent);
  33. console.log(`Backup created for ${filePath} at ${backupFilePath}`);
  34. return true; // Success
  35. } catch (error) {
  36. console.error(`Backup failed for ${filePath} (attempt ${attempt + 1}): ${error.message}`);
  37. if (attempt < retries - 1) {
  38. await new Promise(resolve => setTimeout(resolve, retryDelay)); // Wait before retrying
  39. } else {
  40. console.error(`Backup failed for ${filePath} after ${retries} attempts.`);
  41. return false; // Failure
  42. }
  43. }
  44. }
  45. }
  47. // Process each file path
  48. const promises = filePaths.map(backupFile);
  49. await Promise.all(promises);
  50. }
  53. /**
  54. * Schedules the backup job.
  55. * @param {string[]} filePaths Array of file paths to backup.
  56. * @param {string} backupDir Directory to store backups.
  57. * @param {string} scheduleExpression Cron expression for scheduling.
  58. */
  59. function scheduleBackup(filePaths, backupDir, scheduleExpression) {
  60. schedule.scheduleJob(scheduleExpression, () => {
  61. console.log('Running scheduled backup...');
  62. backupFiles(filePaths, backupDir);
  63. });
  64. }
  67. module.exports = { backupFiles, scheduleBackup };

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