layout_paragraphs-1.0.x-dev/modules/layout_paragraphs_library/layout_paragraphs_library.module

<?php

/**
 * @file
 * Contains layout paragraphs library module.
 */

use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\ReplaceCommand;
use Drupal\Core\Form\FormStateInterface;
use Drupal\paragraphs\Entity\Paragraph;
use Drupal\paragraphs_library\Entity\LibraryItem;

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Alters the layout paragraphs component form to add 'Promote to library'.
 */
function layout_paragraphs_library_form_layout_paragraphs_component_form_alter(array &$form, FormStateInterface $form_state) {
  /** @var \Drupal\layout_paragraphs\Contracts\ComponentFormInterface $form_object */
  $form_object = $form_state->getFormObject();
  $paragraph = $form_object->getParagraph();
  $paragraph_type = $paragraph->getParagraphType();

  // Only applies to paragraph types that allow being promoted to a library.
  // Section paragraphs cannot be used as library items.
  $allow_library_conversion =
    $paragraph_type->getThirdPartySetting('paragraphs_library', 'allow_library_conversion', FALSE)
    && !$paragraph_type->hasEnabledBehaviorPlugin('layout_paragraphs');
  if ($allow_library_conversion) {
    $form['actions']['promote_to_library'] = [
      '#type' => 'submit',
      '#value' => t('Promote to library'),
      '#submit' => ['layout_paragraphs_library_submit'],
      '#name' => 'promote-to-library',
      '#ajax' => [
        'callback' => 'layout_paragraphs_library_ajax',
      ],
      '#attributes' => [
        'class' => [
          'lpb-btn--promote-to-library',
        ],
      ],
      '#weight' => 110,
    ];
    // Fix inline_entity_form compatibility.
    // @see https://www.drupal.org/project/inline_entity_form/issues/2830136
    if (isset($form['actions']['submit']['#ief_submit_trigger'])) {
      $form['actions']['promote_to_library']['#ief_submit_trigger'] = TRUE;
      $form['actions']['promote_to_library']['#ief_submit_trigger_all'] = TRUE;
      array_unshift($form['actions']['promote_to_library']['#submit'], $form['actions']['submit']['#submit'][0]);
    }
  }

  // Check if it is from a library.
  if ($paragraph_type->id() === 'from_library') {
    $form['actions']['unlink_from_library'] = [
      '#type' => 'submit',
      '#value' => t('Unlink from library'),
      '#submit' => ['layout_paragraphs_library_submit'],
      '#name' => 'unlink-from-library',
      '#ajax' => [
        'callback' => 'layout_paragraphs_library_ajax',
      ],
      '#attributes' => [
        'class' => [
          'lpb-btn--unlink-from-library',
        ],
      ],
      '#weight' => 110,
    ];

    // Fix inline_entity_form compatibility.
    // @see https://www.drupal.org/project/inline_entity_form/issues/2830136
    if (isset($form['actions']['submit']['#ief_submit_trigger'])) {
      $form['actions']['unlink_from_library']['#ief_submit_trigger'] = TRUE;
      $form['actions']['unlink_from_library']['#ief_submit_trigger_all'] = TRUE;
      array_unshift($form['actions']['unlink_from_library']['#submit'], $form['actions']['submit']['#submit'][0]);
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Alters the paragraph types form.
 */
function layout_paragraphs_library_form_paragraphs_type_form_alter(array &$form, FormStateInterface $form_state) {
  /** @var \Drupal\paragraphs\Form\ParagraphsTypeForm $form_object */
  $form_object = $form_state->getFormObject();
  /** @var \Drupal\paragraphs\ParagraphsTypeInterface $paragraph_type */
  $paragraph_type = $form_object->getEntity();
  if ($paragraph_type->id() != 'from_library' && $paragraph_type->hasEnabledBehaviorPlugin('layout_paragraphs')) {
    $form['#process'][] = 'layout_paragraphs_library_disable_allow_library_conversion';
  }
}

/**
 * Form #process callback.
 *
 * Blocks access to 'allow_library_conversion' form field.
 */
function layout_paragraphs_library_disable_allow_library_conversion($form, FormStateInterface $form_state) {
  if (isset($form['allow_library_conversion'])) {
    $form['allow_library_conversion']['#access'] = FALSE;
  }
  return $form;
}

/**
 * Form submit callback for "Promote to library" button.
 */
function layout_paragraphs_library_submit(&$form, FormStateInterface $form_state) {

  $tempstore = \Drupal::service('layout_paragraphs.tempstore_repository');
  /** @var \Drupal\layout_paragraphs\Contracts\ComponentFormInterface $form_object */
  $form_object = $form_state->getFormObject();
  $paragraph = $form_object->buildParagraphComponent($form, $form_state);
  $layout_paragraphs_layout = $form_object->getLayoutParagraphsLayout();
  $component = $layout_paragraphs_layout->getComponent($paragraph);
  $component_settings = $component->getSettings();

  $form_state->set('original_paragraph', $paragraph);

  $new_paragraph = NULL;
  if ($form_state->getTriggeringElement()['#name'] === 'promote-to-library') {
    // Replacing an element in the array.
    $library_item = LibraryItem::createFromParagraph($paragraph);
    $library_item->save();

    // Replace this paragraph with a library reference one.
    $new_paragraph = Paragraph::create([
      'type' => 'from_library',
      'field_reusable_paragraph' => $library_item,
    ]);

  }
  else {
    // Assume triggered element is "unlink-from-library".
    $original_paragraph = NULL;
    if ($paragraph->hasField('field_reusable_paragraph')) {
      /** @var \Drupal\paragraphs_library\Entity\LibraryItem $library_item */
      $library_item = $paragraph->get('field_reusable_paragraph')->entity;
      if ($library_item) {
        /** @var \Drupal\paragraphs\Entity\Paragraph $original_paragraph */
        $original_paragraph = $library_item->get('paragraphs')->entity;
        $form_object->setParagraph($original_paragraph);
        $new_paragraph = $original_paragraph;
      }
    }
  }

  $library_component = $layout_paragraphs_layout->getComponent($new_paragraph);
  $library_component->setSettings($component_settings);
  $form_object->setParagraph($library_component->getEntity());

  if (get_class($form_object) == 'Drupal\layout_paragraphs\Form\EditComponentForm') {
    $layout_paragraphs_layout->insertBeforeComponent($paragraph->uuid(), $library_component->getEntity());
    $layout_paragraphs_layout->deleteComponent($paragraph->uuid());
    $form_object->setLayoutParagraphsLayout($layout_paragraphs_layout);
    $tempstore->set($form_object->getLayoutParagraphsLayout());
  }
  elseif (get_class($form_object) == 'Drupal\layout_paragraphs\Form\InsertComponentForm') {
    $form_object->setParagraph($library_component->getEntity());
    /** @var \Drupal\layout_paragraphs\Form\InsertComponentForm $form_object */
    $form_object->insertComponent();
    $tempstore->set($form_object->getLayoutParagraphsLayout());
  }

}

/**
 * Ajax callback for "Promote to library" button.
 */
function layout_paragraphs_library_ajax(&$form, FormStateInterface $form_state) {

  // Check for errors.
  if ($form_state->hasAnyErrors()) {
    $form['status_messages'] = [
      '#type' => 'status_messages',
      '#weight' => -1000,
    ];
    $form['#sorted'] = FALSE;
    $response = new AjaxResponse();
    $response->addCommand(new ReplaceCommand('[data-drupal-selector="' . $form['#attributes']['data-drupal-selector'] . '"]', $form));
    return $response;
  }

  $original_paragraph = $form_state->get('original_paragraph');
  /** @var \Drupal\layout_paragraphs\Contracts\ComponentFormInterface $form_object */
  $form_object = $form_state->getFormObject();
  if (get_class($form_object) == 'Drupal\layout_paragraphs\Form\EditComponentForm') {
    $response = $form_object->successfulAjaxSubmit($form, $form_state);
    $wrong_selector = '[data-uuid=' . $form_object->getParagraph()->uuid() . ']';
    $correct_selector = '[data-uuid=' . $original_paragraph->uuid() . ']';
    foreach ($response->getCommands() as &$command) {
      if ($command['command'] == 'insert' && $command['selector'] == $wrong_selector) {
        $command['selector'] = $correct_selector;
      }
    }
    return $response;
  }
  else {
    return $form_object->successfulAjaxSubmit($form, $form_state);
  }
}

/**
 * Implements hook_library_info_alter().
 *
 * Remove once Issue #3502302 "HookCollectorPass fails to correctly register
 * module hooks in some contexts" is fixed in core.
 *
 * @see https://www.drupal.org/project/drupal/issues/3502302
 */
function layout_paragraphs_library_library_info_alter(&$libraries, $extension): void {
  layout_paragraphs_library_info_alter($libraries, $extension);
}