1. /**
  2. * Diffs two datasets of query strings and logs differences.
  3. *
  4. * @param {string} str1 The first query string.
  5. * @param {string} str2 The second query string.
  6. * @param {string} [keyPrefix=''] Optional prefix for keys in the diff output.
  7. */
  8. function diffQueryStrings(str1, str2, keyPrefix = '') {
  9. const diffLog = [];
  11. const parseQueryString = (str) => {
  12. const params = {};
  13. if (!str) return params; // Handle empty string
  14. const pairs = str.split('&');
  15. for (const pair of pairs) {
  16. const [key, value] = pair.split('=');
  17. if (key) {
  18. params[key] = value || ''; // Handle missing value
  19. }
  20. }
  21. return params;
  22. };
  24. const params1 = parseQueryString(str1);
  25. const params2 = parseQueryString(str2);
  27. // Find keys present in str1 but not in str2
  28. for (const key in params1) {
  29. if (!(key in params2)) {
  30. diffLog.push(`${keyPrefix}[${key}] Removed from str2`);
  31. }
  32. }
  34. // Find keys present in str2 but not in str1
  35. for (const key in params2) {
  36. if (!(key in params1)) {
  37. diffLog.push(`${keyPrefix}[${key}] Added to str2`);
  38. }
  39. }
  41. // Find keys with different values
  42. for (const key in params1) {
  43. if (params1[key] !== params2[key]) {
  44. diffLog.push(`${keyPrefix}[${key}] Value changed from "${params1[key]}" to "${params2[key]}"`);
  45. }
  46. }
  48. // Find keys present in both strings but with different values
  49. for (const key in params1) {
  50. if (key in params2 && params1[key] !== params2[key]) {
  51. diffLog.push(`${keyPrefix}[${key}] Value changed from "${params1[key]}" to "${params2[key]}"`);
  52. }
  53. }
  55. if (diffLog.length > 0) {
  56. console.log("Query String Differences:");
  57. diffLog.forEach(logEntry => console.log(logEntry));
  58. } else {
  59. console.log("No differences found.");
  60. }
  61. }

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