1. /**
  2. * Data Migration Error Reporter
  3. *
  4. * @param {Array<Object>} data - Array of data entries to validate.
  5. * @param {Object} schema - Schema defining the expected data structure and types.
  6. * @returns {Array<string>} - Array of error messages. Empty if no errors.
  7. */
  8. function reportMigrationErrors(data, schema) {
  9. const errors = [];
  11. if (!Array.isArray(data)) {
  12. errors.push("Data must be an array.");
  13. return errors;
  14. }
  16. if (!schema || typeof schema !== 'object') {
  17. errors.push("Schema must be an object.");
  18. return errors;
  19. }
  21. for (let i = 0; i < data.length; i++) {
  22. const entry = data[i];
  24. if (typeof entry !== 'object' || entry === null) {
  25. errors.push(`Entry at index ${i} is not a valid object.`);
  26. continue; // Skip to the next entry
  27. }
  29. for (const key in schema) {
  30. if (schema.hasOwnProperty(key)) {
  31. const expectedType = schema[key].type;
  32. const required = schema[key].required === true;
  34. if (key === 'required' && schema[key].required === true) continue; //Skip checking required field
  36. if (expectedType === 'string' && typeof entry[key] !== 'string') {
  37. errors.push(`Entry at index ${i}, key '${key}' is not a string. Expected string, got ${typeof entry[key]}`);
  38. } else if (expectedType === 'number' && typeof entry[key] !== 'number') {
  39. errors.push(`Entry at index ${i}, key '${key}' is not a number. Expected number, got ${typeof entry[key]}`);
  40. } else if (expectedType === 'boolean' && typeof entry[key] !== 'boolean') {
  41. errors.push(`Entry at index ${i}, key '${key}' is not a boolean. Expected boolean, got ${typeof entry[key]}`);
  42. } else if (expectedType === 'array' && !Array.isArray(entry[key])) {
  43. errors.push(`Entry at index ${i}, key '${key}' is not an array. Expected array, got ${typeof entry[key]}`);
  44. } else if (expectedType === 'object' && typeof entry[key] !== 'object' || entry[key] === null) {
  45. errors.push(`Entry at index ${i}, key '${key}' is not an object. Expected object, got ${typeof entry[key]}`);
  46. }
  47. // Add more type checks as needed (e.g., date, etc.)
  49. if (required && !(key in entry) || (key in entry && entry[key] === null || entry[key] === undefined)) {
  50. errors.push(`Entry at index ${i}, key '${key}' is required but missing or null/undefined.`);
  51. }
  52. }
  53. }
  54. }
  56. return errors;
  57. }

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