1. /**
  2. * Flattens a nested file path structure.
  3. *
  4. * @param {string} path The file path to flatten.
  5. * @returns {string} The flattened file path, or null if the input is invalid.
  6. */
  7. function flattenFilePath(path) {
  8. if (typeof path !== 'string' || path.trim() === '') {
  9. return null; // Basic input validation: check if it's a non-empty string
  10. }
  12. const parts = path.split(/[\\/]/); // Split by path separators
  13. const flattened = parts.filter(part => part !== ''); // Remove empty strings from the array
  15. return flattened.join('/'); // Join with forward slashes
  16. }
  18. /**
  19. * Validates the flattened path.
  20. *
  21. * @param {string} flattenedPath The flattened path to validate.
  22. * @returns {boolean} True if the path is valid, false otherwise.
  23. */
  24. function isValidFlattenedPath(flattenedPath) {
  25. if (typeof flattenedPath !== 'string' || flattenedPath.trim() === '') {
  26. return false; //check if it's a non-empty string
  27. }
  28. if (!/^[a-zA-Z0-9_\-\/]+$/.test(flattenedPath)) { //check if contains only allowed characters
  29. return false;
  30. }
  31. return true;
  32. }
  35. /**
  36. * Processes a file path, flattening it and validating the result.
  37. *
  38. * @param {string} path The file path to process.
  39. * @returns {string|null} The flattened and validated file path, or null if invalid.
  40. */
  41. function processFilePath(path) {
  42. const flattened = flattenFilePath(path);
  44. if (flattened) {
  45. if (isValidFlattenedPath(flattened)) {
  46. return flattened;
  47. } else {
  48. return null; // Invalid flattened path
  49. }
  50. } else {
  51. return null; // Invalid input path
  52. }
  53. }

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