1. <?php
  3. /**
  4. * Resolves dependencies of API payloads.
  5. *
  6. * This function takes an array of API payloads and resolves their dependencies
  7. * based on a predefined dependency map. Minimal configuration is achieved
  8. * through the dependency map itself.
  9. *
  10. * @param array $payloads An array of API payload data (associative arrays).
  11. * @param array $dependencies A dependency map where keys are payload names and
  12. * values are arrays of required payload names.
  13. * @return array An array of resolved payloads, where each payload contains
  14. * all its dependencies merged into it. Returns an empty array
  15. * if no payloads are provided.
  16. */
  17. function resolvePayloadDependencies(array $payloads, array $dependencies): array
  18. {
  19. if (empty($payloads)) {
  20. return [];
  21. }
  23. $resolvedPayloads = [];
  24. $dependenciesMap = $dependencies; //Make a copy to avoid modifying original
  26. foreach ($payloads as $payloadName => $payloadData) {
  27. $resolvedPayloads[$payloadName] = $payloadData;
  29. if (isset($dependenciesMap[$payloadName])) {
  30. $requiredDependencies = $dependenciesMap[$payloadName];
  32. foreach ($requiredDependencies as $dependencyName) {
  33. if (array_key_exists($dependencyName, $resolvedPayloads)) {
  34. $resolvedPayloads[$payloadName] = array_merge($resolvedPayloads[$payloadName], $resolvedPayloads[$dependencyName]);
  35. } else {
  36. // Handle missing dependencies. Could log an error, throw an exception, or skip.
  37. // For this example, we'll skip the dependency and log a warning.
  38. error_log("Warning: Dependency '$dependencyName' missing for payload '$payloadName'.");
  39. }
  40. }
  41. }
  42. }
  44. return $resolvedPayloads;
  45. }
  47. /**
  48. * Example usage and dependency map.
  49. */
  50. return; //This is just a placeholder to allow the code to be valid. No actual code is executed here.
  52. /*
  53. Example Usage:
  55. $payloads = [
  56. 'user' => ['id' => 123, 'name' => 'John Doe'],
  57. 'address' => ['street' => '123 Main St', 'city' => 'Anytown'],
  58. 'order' => ['orderId' => 'ORD-456', 'items' => ['item1', 'item2']]
  59. ];
  61. $dependencies = [
  62. 'user' => ['address'],
  63. 'order' => ['user', 'address']
  64. ];
  66. $resolved = resolvePayloadDependencies($payloads, $dependencies);
  68. // Now $resolved contains payloads with merged dependencies.
  70. print_r($resolved);
  71. */
  73. ?>

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