1. <?php
  3. /**
  4. * Normalizes metadata data for scheduled runs with defensive checks.
  5. *
  6. * @param array $metadata The input metadata array.
  7. * @return array The normalized metadata array, or an empty array on error.
  8. */
  9. function normalizeMetadata(array $metadata): array
  10. {
  11. // Defensive check: Ensure input is an array
  12. if (!is_array($metadata)) {
  13. error_log("normalizeMetadata: Invalid input - expected array.");
  14. return [];
  15. }
  17. $normalizedMetadata = [];
  19. foreach ($metadata as $key => $value) {
  20. // Defensive check: Ensure key is a string
  21. if (!is_string($key)) {
  22. error_log("normalizeMetadata: Invalid key type - expected string. Key: " . $key);
  23. continue; // Skip invalid key
  24. }
  26. // Defensive check: Ensure value is not null or undefined
  27. if ($value === null || $value === undefined) {
  28. error_log("normalizeMetadata: Invalid value - cannot be null or undefined. Key: " . $key);
  29. $normalizedMetadata[$key] = null; // or skip, depending on requirements
  30. continue;
  31. }
  33. // Normalize data types: attempt to cast to string, integer, or float
  34. $normalizedValue = $value;
  36. //Try to cast to string
  37. if (!is_string($normalizedValue)) {
  38. $normalizedValue = (string)$normalizedValue;
  39. }
  41. //Try to cast to integer
  42. if (!is_int($normalizedValue) && is_numeric($normalizedValue)) {
  43. $normalizedValue = (int)$normalizedValue;
  44. }
  46. //Try to cast to float
  47. if (!is_float($normalizedValue) && is_numeric($normalizedValue)) {
  48. $normalizedValue = (float)$normalizedValue;
  49. }
  51. $normalizedMetadata[$key] = $normalizedValue;
  52. }
  54. return $normalizedMetadata;
  55. }
  57. //Example usage & testing
  58. if (count($argv) > 1) {
  59. $inputData = json_decode($argv[1], true);
  60. $normalizedData = normalizeMetadata($inputData);
  62. if (!empty($normalizedData)) {
  63. echo json_encode($normalizedData, JSON_PRETTY_PRINT) . PHP_EOL;
  64. } else {
  65. echo "Normalization failed." . PHP_EOL;
  66. }
  67. } else {
  68. $testData = [
  69. "timestamp" => "2023-10-27 10:00:00",
  70. "count" => "123",
  71. "value" => 3.14,
  72. "flag" => true,
  73. "description" => null,
  74. "invalidKey" => 123
  75. ];
  77. $normalizedData = normalizeMetadata($testData);
  78. echo json_encode($normalizedData, JSON_PRETTY_PRINT) . PHP_EOL;
  79. }
  80. ?>

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