1. /**
  2. * Validates API payload against predefined conditions with a timeout.
  3. *
  4. * @param {object} payload The API payload to validate.
  5. * @param {object} conditions An object defining validation conditions. Keys are field names, values are validation functions.
  6. * @param {number} timeoutMs Timeout in milliseconds.
  7. * @returns {Promise<object|null>} A promise that resolves with the validated payload or null if validation fails. Rejects on timeout.
  8. * @throws {Error} If conditions is not an object or timeoutMs is not a number.
  9. */
  10. async function validatePayload(payload, conditions, timeoutMs) {
  11. if (typeof conditions !== 'object' || conditions === null) {
  12. throw new Error("Conditions must be an object.");
  13. }
  14. if (typeof timeoutMs !== 'number' || timeoutMs <= 0) {
  15. throw new Error("Timeout must be a positive number.");
  16. }
  18. const startTime = Date.now();
  20. for (const field in conditions) {
  21. if (conditions.hasOwnProperty(field)) {
  22. try {
  23. const validationFunction = conditions[field];
  24. const result = await validationFunction(payload[field]);
  26. if (!result) {
  27. console.warn(`Validation failed for field: ${field}`);
  28. return null; // Validation failed
  29. }
  30. } catch (error) {
  31. console.error(`Validation error for field ${field}:`, error);
  32. return null; // Validation failed
  33. }
  34. }
  35. }
  37. return payload; // All validations passed
  38. }
  40. // Example validation functions (can be customized)
  41. function isString(value) {
  42. return typeof value === 'string' && value.length > 0;
  43. }
  45. function isNumber(value) {
  46. return typeof value === 'number' && !isNaN(value);
  47. }
  49. function isArray(value) {
  50. return Array.isArray(value);
  51. }
  53. function isObject(value) {
  54. return typeof value === 'object' && value !== null;
  55. }
  58. // Example usage:
  59. // const payload = {
  60. // name: "John Doe",
  61. // age: 30,
  62. // email: "john.doe@example.com",
  63. // hobbies: ["reading", "hiking"]
  64. // };
  65. //
  66. // const conditions = {
  67. // name: isString,
  68. // age: isNumber,
  69. // email: isString,
  70. // hobbies: isArray
  71. // };
  72. //
  73. // const timeout = 5000; // 5 seconds
  74. //
  75. // validatePayload(payload, conditions, timeout)
  76. // .then(validatedPayload => {
  77. // if (validatedPayload) {
  78. // console.log("Payload is valid:", validatedPayload);
  79. // } else {
  80. // console.log("Payload is invalid.");
  81. // }
  82. // })
  83. // .catch(error => {
  84. // console.error("Error:", error);
  85. // });

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