paragraphs.api.php

<?php

/**
 * @file
 * Hooks and documentation related to paragraphs module.
 */
use Drupal\paragraphs\ParagraphInterface;

/**
 * @addtogroup hooks
 * @{
 */

/**
 * Alter the information provided in
 * \Drupal\paragraphs\Annotation\ParagraphsBehavior.
 *
 * @param $paragraphs_behavior
 *   The array of paragraphs behavior plugins, keyed on the
 *   machine-readable plugin name.
 */
function hook_paragraphs_behavior_info_alter(&$paragraphs_behavior) {

  // Set a new label for the my_layout plugin instead of the one
  // provided in the annotation.
  $paragraphs_behavior['my_layout']['label'] = t('New label');
}

/**
 * Alter paragraphs widget.
 *
 * @param array $widget_actions
 *   Array with actions and dropdown widget actions.
 * @param array $context
 *   An associative array containing the following key-value pairs:
 *   - form: The form structure to which widgets are being attached. This may be
 *     a full form structure, or a sub-element of a larger form.
 *   - widget: The widget plugin instance.
 *   - items: The field values, as a
 *     \Drupal\Core\Field\FieldItemListInterface object.
 *   - delta: The order of this item in the array of subelements (0, 1, 2, etc).
 *   - element: A form element array containing basic properties for the widget.
 *   - form_state: The current state of the form.
 *   - paragraphs_entity: the paragraphs entity for this widget. Might be
 *     unsaved, if we have just added a new item to the widget.
 *   - is_translating: Boolean if the widget is translating.
 *   - allow_reference_changes: Boolean if changes to structure are OK.
 */
function hook_paragraphs_widget_actions_alter(array &$widget_actions, array &$context) {
}

/**
 * Alters the paragraphs after conversion.
 *
 * This hook is fired once per converted paragraph entity. The hook
 * implementations must handle paragraphs translations on their own.
 *
 * @param \Drupal\paragraphs\ParagraphInterface $original
 *   The original paragraph entity.
 * @param \Drupal\paragraphs\ParagraphInterface $converted
 *   The converted paragraph entity.
 */
function hook_paragraphs_conversion_alter(ParagraphInterface $original, ParagraphInterface $converted) {

  // Alter the converted text value.
  if ($converted
    ->bundle() == 'text_image') {
    $field_name = 'field_text_demo';
    if ($converted
      ->hasField($field_name) && !$converted
      ->get($field_name)
      ->isEmpty()) {
      $value = implode(', ', [
        'New',
        $converted
          ->get($field_name)->value,
      ]);
      $converted
        ->set($field_name, $value);
    }
  }
}

/**
 * @} End of "addtogroup hooks".
 */