1. /**
  2. * Diffs two datasets of directories and returns a list of differences.
  3. *
  4. * @param {string[]} dataset1 - The first dataset of directories.
  5. * @param {string[]} dataset2 - The second dataset of directories.
  6. * @returns {object} An object containing the differences: added, removed, and common directories.
  7. * Returns null if input validation fails.
  8. */
  9. function diffDirectories(dataset1, dataset2) {
  10. // Input validation
  11. if (!Array.isArray(dataset1) || !Array.isArray(dataset2)) {
  12. console.error("Error: Inputs must be arrays.");
  13. return null;
  14. }
  16. if (dataset1.length === 0 && dataset2.length === 0) {
  17. return { added: [], removed: [], common: [] }; // Both empty, nothing to diff
  18. }
  20. if (dataset1.length === 0) {
  21. return { added: dataset2, removed: [], common: [] }; // dataset1 is empty, all in dataset2 are added
  22. }
  24. if (dataset2.length === 0) {
  25. return { added: [], removed: dataset1, common: [] }; // dataset2 is empty, all in dataset1 are removed
  26. }
  29. const added = [];
  30. const removed = [];
  31. const common = [];
  33. // Helper function to check if a directory exists
  34. function directoryExists(dir) {
  35. try {
  36. return fs.existsSync(dir); // Use fs.existsSync for basic existence check
  37. } catch (e) {
  38. return false; //Handle potential errors during directory existence check
  39. }
  40. }
  42. for (const dir1 of dataset1) {
  43. if (!directoryExists(dir1)) {
  44. removed.push(dir1);
  45. } else {
  46. const index = dataset2.indexOf(dir1);
  47. if (index === -1) {
  48. removed.push(dir1);
  49. } else {
  50. common.push(dir1);
  51. }
  52. }
  53. }
  55. for (const dir2 of dataset2) {
  56. if (!directoryExists(dir2) && !removed.includes(dir2)) {
  57. added.push(dir2);
  58. }
  59. }
  61. return { added, removed, common };
  62. }
  65. // Dummy fs module for testing. Replace with actual fs module in a real application.
  66. const fs = require('fs'); //Import the fs module

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