vendor/symfony/form/ChoiceList/Loader/AbstractChoiceLoader.php line 54

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  1. <?php
  3. /*
  4. * This file is part of the Symfony package.
  5. *
  6. * (c) Fabien Potencier <[email protected]>
  7. *
  8. * For the full copyright and license information, please view the LICENSE
  9. * file that was distributed with this source code.
  10. */
  12. namespace Symfony\Component\Form\ChoiceList\Loader;
  14. use Symfony\Component\Form\ChoiceList\ArrayChoiceList;
  15. use Symfony\Component\Form\ChoiceList\ChoiceListInterface;
  17. /**
  18. * @author Jules Pietri <[email protected]>
  19. */
  20. abstract class AbstractChoiceLoader implements ChoiceLoaderInterface
  21. {
  22. /**
  23. * The loaded choices.
  24. *
  25. * @var iterable|null
  26. */
  27. private $choices;
  29. /**
  30. * @final
  31. *
  32. * {@inheritdoc}
  33. */
  34. public function loadChoiceList(?callable $value = null): ChoiceListInterface
  35. {
  36. return new ArrayChoiceList($this->choices ?? $this->choices = $this->loadChoices(), $value);
  37. }
  39. /**
  40. * {@inheritdoc}
  41. */
  42. public function loadChoicesForValues(array $values, ?callable $value = null)
  43. {
  44. if (!$values) {
  45. return [];
  46. }
  48. return $this->doLoadChoicesForValues($values, $value);
  49. }
  51. /**
  52. * {@inheritdoc}
  53. */
  54. public function loadValuesForChoices(array $choices, ?callable $value = null)
  55. {
  56. if (!$choices) {
  57. return [];
  58. }
  60. if ($value) {
  61. // if a value callback exists, use it
  62. return array_map(function ($item) use ($value) { return (string) $value($item); }, $choices);
  63. }
  65. return $this->doLoadValuesForChoices($choices);
  66. }
  68. abstract protected function loadChoices(): iterable;
  70. protected function doLoadChoicesForValues(array $values, ?callable $value): array
  71. {
  72. return $this->loadChoiceList($value)->getChoicesForValues($values);
  73. }
  75. protected function doLoadValuesForChoices(array $choices): array
  76. {
  77. return $this->loadChoiceList()->getValuesForChoices($choices);
  78. }
  79. }