SU-SWS/react_paragraphs

<?php

/**
 * @file
 * Contains react_paragraphs_behaviors.module.
 */

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\Element;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function react_paragraphs_behaviors_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the react_paragraphs_behaviors module.
    case 'help.page.react_paragraphs_behaviors':
      $output = '';
      $output .= '<h3>' . t('Behaviors') . '</h3>';
      $output .= '<p>' . t('This module provide the discoverability of behavior plugins within modules and themes as defined in yml files.') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_form_alter().
 */
function react_paragraphs_behaviors_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  $behavior_forms = [
    'paragraphs_row_type_add_form',
    'paragraphs_row_type_edit_form',
    'paragraphs_type_add_form',
    'paragraphs_type_edit_form',
  ];

  if (!in_array($form_id, $behavior_forms) || empty($form['behavior_plugins'])) {
    return;
  }

  // Remove the behavior plugins from the react behavior derivative because we
  // automatically enable/disable it via the config overrides.
  foreach (Element::children($form['behavior_plugins']) as $behavior_plugin_id) {
    if (strpos($behavior_plugin_id, 'react_paragraphs:') === 0) {
      unset($form['behavior_plugins'][$behavior_plugin_id]);
      $form['react_paragraphs_message'] = [
        '#type' => 'container',
        '#markup' => t('Some Behavior plugins provided by yaml configs are enabled/disabled automatically as defined in those files.'),
        '#attributes' => ['class' => ['messages', 'messages--warning']],
      ];
    }
  }

  // Clean up the form if no behaviors exist.
  if (empty(Element::children($form['behavior_plugins']))) {
    unset($form['behavior_plugins']);
  }
}