1. <?php
  3. /**
  4. * Maps fields of text blocks for batch processing.
  5. *
  6. * @param array $textBlocks An array of text blocks, each with fields to map.
  7. * @param array $fieldMappings An array of field mappings, defining how to extract data from the text blocks.
  8. * @return array An array of processed text blocks, with the mapped fields.
  9. */
  10. function mapTextBlocks(array $textBlocks, array $fieldMappings): array
  11. {
  12. $processedBlocks = [];
  14. foreach ($textBlocks as $block) {
  15. $processedBlock = []; // Initialize processed block
  17. foreach ($fieldMappings as $fieldName => $mapping) {
  18. $value = extractFieldValue($block, $mapping); // Extract field value using mapping
  20. $processedBlock[$fieldName] = $value; // Assign to processed block
  21. }
  23. $processedBlocks[] = $processedBlock; // Add to results
  24. }
  26. return $processedBlocks;
  27. }
  30. /**
  31. * Extracts a field value from a text block based on a mapping.
  32. *
  33. * @param array $block The text block to extract from.
  34. * @param array $mapping The mapping for the field.
  35. * @return mixed The extracted field value, or null if not found.
  36. */
  37. function extractFieldValue(array $block, array $mapping)
  38. {
  39. foreach ($mapping as $selector => $path) {
  40. try {
  41. $value = pathToValue($block, $path);
  42. return $value;
  43. } catch (Exception $e) {
  44. // Ignore if path is invalid
  45. }
  46. }
  47. return null; // Field not found
  48. }
  50. /**
  51. * Traverses the text block structure to extract a value.
  52. *
  53. * @param array $block The text block to traverse.
  54. * @param string $path The path to the value (e.g., 'block.field1.subfield2').
  55. * @return mixed The extracted value.
  56. * @throws Exception If the path is invalid.
  57. */
  58. function pathToValue(array $block, string $path)
  59. {
  60. $pathParts = explode('.', $path);
  61. $current = $block;
  63. foreach ($pathParts as $part) {
  64. if (is_array($current) && isset($current[$part])) {
  65. $current = $current[$part];
  66. } else {
  67. throw new Exception("Invalid path: " . $path); // Throw exception for invalid paths
  68. }
  69. }
  71. return $current;
  72. }
  73. ?>

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