class LayoutSectionStorageParamConverter

class LayoutSectionStorageParamConverter implements ParamConverterInterface {
  
  /**
   * The section storage manager.
   *
   * @var \Drupal\layout_builder\SectionStorage\SectionStorageManagerInterface
   */
  protected $sectionStorageManager;
  
  /**
   * Constructs a new LayoutSectionStorageParamConverter.
   *
   * @param \Drupal\layout_builder\SectionStorage\SectionStorageManagerInterface $section_storage_manager
   *   The section storage manager.
   */
  public function __construct(SectionStorageManagerInterface $section_storage_manager) {
    $this->sectionStorageManager = $section_storage_manager;
  }
  
  /**
   * {@inheritdoc}
   */
  public function convert($value, $definition, $name, array $defaults) {
    // If no section storage type is specified or if it is invalid, return.
    if (!isset($defaults['section_storage_type']) || !$this->sectionStorageManager
      ->hasDefinition($defaults['section_storage_type'])) {
      return NULL;
    }
    $type = $defaults['section_storage_type'];
    // Load an empty instance and derive the available contexts.
    $contexts = $this->sectionStorageManager
      ->loadEmpty($type)
      ->deriveContextsFromRoute($value, $definition, $name, $defaults);
    // Attempt to load a full instance based on the context.
    return $this->sectionStorageManager
      ->load($type, $contexts);
  }
  
  /**
   * {@inheritdoc}
   */
  public function applies($definition, $name, Route $route) {
    return !empty($definition['layout_builder_section_storage']) || !empty($definition['layout_builder_tempstore']);
  }

}