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use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;
use Drupal\menu_link_content\Form\MenuLinkContentForm;
use Drupal\menu_link_content\Plugin\Menu\MenuLinkContent;
use Drupal\menu_ui\MenuForm;

/**
 * Implements hook_help().
 */

  if (str_contains($form_id, 'menu_link_content_')) {
    /** @var \Drupal\menu_link_content\Form\MenuLinkContentForm $form_object */
    $form_object = $form_state->getFormObject();
    if (!$form_object instanceof MenuLinkContentForm || taxonomy_menu_sync_user_restrict()) {
      return;
    }

    /** @var \Drupal\menu_link_content\MenuLinkContentInterface $menu_entity */
    $menu_entity = $form_object->getEntity();
    $menu_content_id = $menu_entity->id();

   */
  #[Hook('form_menu_link_content_menu_link_content_form_alter')]
  public function formMenuLinkContentMenuLinkContentFormAlter(&$form, $form_state): void {
    $config = $this->configFactory->get('autocomplete_extras.settings');

    if ($config->get('menu_link_content.enabled') ?? FALSE) {
      $match_limit = $config->get('menu_link_content.match_limit') ?? self::DEFAULT_MATCH_LIMIT;
      $min_length = $config->get('menu_link_content.min_length') ?? self::DEFAULT_MIN_LENGTH;

#[LegacyHook]
function autocomplete_extras_form_menu_link_content_menu_link_content_form_alter(&$form, FormStateInterface $form_state): void {
  \Drupal::service(AutocompleteExtrasHooks::class)->formMenuLinkContentMenuLinkContentFormAlter($form, $form_state);
}

    // The field structure on the Menu Link Content form is different,
    // and the details wrapper is added by alterMenuLinkContentForm().
    elseif ($form_state->getFormObject()->getFormId() == 'menu_link_content_menu_link_content_form') {
      $element += [
        '#type' => 'container',
      ];
    }
    // Otherwise, render as a regular details element.

   */
  #[Hook('form_menu_link_content_form_alter')]
  public function formMenuLinkContentFormAlter(array &$form, FormStateInterface $form_state, string $form_id): void {
    // Adjust the entity_attributes field for menu link content.
    $this->fieldHandler->alterMenuLinkContentForm($form, $form_state, $form_id);
  }

  /**
   * Implements hook_form_FORM_ID_alter() for menu_link_edit.
   *
   * @usedby StaticMenuLinkAttributes

   *   The form ID.
   */
  public function alterMenuLinkContentForm(array &$form, FormStateInterface $form_state, string $form_id): void {
    if (!$this->pluginManager->isPluginEnabled('menu_link_content', 'menu_link_content')) {
      return;
    }

    // Checking the entity_attributes field exists in the form.
    if (!isset($form['entity_attributes'])) {

/**
 * Implements hook_form_BASE_FORM_ID_alter() for \Drupal\menu_link_content\MenuLinkContentForm.
 *
 * Move Domain Access fields to an advanced tab like other node settings.
 */
function domain_menu_access_form_menu_link_content_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  /** @var \Drupal\menu_link_content\Form\MenuLinkContentForm $form_object */
  $form_object = $form_state->getFormObject();
  /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $entity */
  $entity = $form_object->getEntity();

  /** @var \Drupal\system\MenuInterface $menu */
  $form['domain'] = [

 */
function domain_menu_access_form_menu_link_content_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  /** @var \Drupal\menu_link_content\Form\MenuLinkContentForm $form_object */
  $form_object = $form_state->getFormObject();
  /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $entity */
  $entity = $form_object->getEntity();

  $config = \Drupal::config('domain_menu_access.settings')->get('menu_enabled');

  /**
   * Constructs a MenuLinkContentForm object.
   *
   * @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
   *   The entity repository.
   * @param \Drupal\Core\Menu\MenuParentFormSelectorInterface $menu_parent_selector
   *   The menu parent form selector service.
   * @param \Drupal\Core\Path\PathValidatorInterface $path_validator

entity_hierarchy_microsite:
  class: \Drupal\entity_hierarchy_microsite\Plugin\Menu\MicrositeMenuItem
  form_class: \Drupal\entity_hierarchy_microsite\Form\MenuLinkContentForm
  deriver: \Drupal\entity_hierarchy_microsite\Plugin\Deriver\MicrositeMenuItemDeriver

use Drupal\Core\Form\FormStateInterface;
use Drupal\menu_link_content\Form\MenuLinkContentForm;

/**
 * Form wrapper for MenuLinkContentForm.
 *
 * @ingroup group_content_menu
 */
final class MenuLinkItemForm extends MenuLinkContentForm {

  /**
   * {@inheritdoc}
   */
  public function save(array $form, FormStateInterface $form_state) {
    parent::save($form, $form_state);

use Drupal\group\Entity\GroupRelationship;
use Drupal\group\Entity\GroupRelationshipType;
use Drupal\menu_link_content\Form\MenuLinkContentForm;
use Drupal\menu_ui\Form\MenuLinkEditForm;
use Drupal\system\MenuInterface;

/**
 * Implements hook_entity_create_access().
 *

  // Filter menu options to group menus.
  if ($form_object instanceof MenuLinkEditForm || $form_object instanceof MenuLinkContentForm) {
    $account = \Drupal::currentUser();
    if (!$account->hasPermission('administer menu')) {
      groupmenu_filter_parent_options($form['menu_parent']['#options']);
    }
  }

  public static function trustedCallbacks(): array {
    return [
      'menuLinkContentFormPreRender',
    ];
  }

  /**
   * Pre render callback for menu_link_content_form form.
   *

   * @see improvements_form_menu_link_content_form_alter()
   */
  public static function menuLinkContentFormPreRender(array $form): array {
    $form['description']['#weight'] = -1.1;
    return $form;
  }

}

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Menu\MenuLinkInterface;
use Drupal\menu_link_content\Form\MenuLinkContentForm;
use Drupal\menu_link_content\MenuLinkContentInterface;
use Drupal\menu_ui\Form\MenuLinkEditForm;
use Drupal\system\Entity\Menu;
use Drupal\system\Plugin\Block\SystemMenuBlock;

require_once __DIR__ . '/improvements_menu.link_advanced_settings.inc';

 * Implements hook_form_FORM_ID_alter(): menu_link_content_form.
 *
 * @see \Drupal\menu_link_content\Form\MenuLinkContentForm::form()
 */
function improvements_menu_form_menu_link_content_form_alter(array &$form, FormStateInterface $form_state): void {
  $menu_link_form_object = $form_state->getFormObject(); /** @var MenuLinkContentForm $menu_link_form_object */
  $menu_link = $menu_link_form_object->getEntity(); /** @var MenuLinkContentInterface $menu_link */

  // Add autofocus to menu link title
  if (isset($form['title']['widget'][0]['value'])) {
    $form['title']['widget'][0]['value']['#attributes']['autofocus'] = 'autofocus';
  }

  $form['#entity_builders'][] = 'improvements_menu_link_content_entity_builder';
  $form['actions']['submit']['#submit'][] = 'improvements_menu_link_form_submit';
  $form['#pre_render'][] = '\Drupal\improvements_menu\ImprovementsMenuTrustedCallbacks::menuLinkContentFormPreRender';

  improvements_menu_link_advanced_settings_form_alter($form, $form_state);
}

/**
 * Implements hook_form_FORM_ID_alter(): menu_link_edit.

use Drupal\Core\Url;
use Drupal\druhels\DrupalHelper;
use Drupal\menu_link_content\Form\MenuLinkContentForm;
use Drupal\menu_link_content\MenuLinkContentInterface;
use Drupal\menu_ui\Form\MenuLinkEditForm;
use Drupal\menu_ui\MenuForm;
use Drupal\system\Entity\Menu;
use Drupal\system\MenuInterface;

  $form_object = $form_state->getFormObject();

  if ($form_object instanceof MenuLinkContentForm) {
    $menu_link = $form_object->getEntity(); /** @var MenuLinkContentInterface $menu_link */
  }
  elseif ($form_object instanceof MenuLinkEditForm) {
    $menu_link = $form_state->getBuildInfo()['args'][0]; /** @var MenuLinkInterface $menu_link */
  }
  else {

   * #[Hook('form_menu_link_content_form_alter')]
   */
  public function formMenuLinkContentFormAlter(&$form, FormStateInterface $form_state, $form_id) : void {
    $menu_link = $form_state->getFormObject()->getEntity();
    $options = $menu_link->link->first()->options ?: [];
    $this->menuBootstrapIconForm($form, $options);
    $this->menuBootstrapIconRole($form, $options);
    $form['actions']['submit']['#submit'][] = [static::class, 'menuLinkContentFormSubmit'];
  }

  /**
   * Implements hook_form_BASE_FORM_ID_alter().
   *
   * #[Hook('form_menu_link_edit_alter')]

   * @throws \Drupal\Core\Entity\EntityStorageException
   */
  protected function menuLinkContentFormSubmit(array $form, FormStateInterface $form_state) {
    $icon_field = $form_state->getValue('icon');
    $icon_tag = $form_state->getValue('icon_tag');
    $icon_appearance = $form_state->getValue('icon_appearance');
    $roles = array_filter($form_state->getValue('menu_item_roles') ?? []);

    $options = [

function menu_disallow_external_links_form_menu_link_content_menu_link_content_form_alter(&$form, FormStateInterface $form_state, $form_id) {
  // Get menu link object.
  /** @var Drupal\menu_link_content\Form\MenuLinkContentForm */
  $form_object = $form_state->getFormObject();
  /** @var Drupal\menu_link_content\Entity\MenuLinkContent */
  $menu_link = $form_object->getEntity();

  // Determine whether the link belongs to a menu that disallows external links.
  $menu_name = $menu_link->getMenuName();

 */
function menu_link_highlight_menu_link_content_form_submit($form, FormStateInterface $form_state) {
  /** @var \Drupal\menu_link_content\Form\MenuLinkContentForm $form_object */
  $form_object = $form_state->getFormObject();
  $menu_link = $form_object->getEntity();

  if (!$menu_link->link) {
    return;
  }

  // Retrieve current user account + menu link object.
  $account = \Drupal::currentUser()->getAccount();
  /** @var Drupal\menu_link_content\Form\MenuLinkContentForm */
  $form_object = $form_state->getFormObject();
  /** @var Drupal\menu_link_content\Entity\MenuLinkContent */
  $menu_link = $form_object->getEntity();

  // Limit options in 'Parent link' field.
  if (!empty($form['menu_parent']['#options']) && !$account->hasPermission('move menu links across menus')) {

  $is_content = FALSE;
  if ($hide_on_content_mode != MenuPerRoleAdminSettings::MODE_DISPLAY_ON_CONTENT_ALWAYS) {
    /** @var \Drupal\menu_link_content\Form\MenuLinkContentForm $form_obj */
    $form_obj = $form_state->getFormObject();
    /** @var \Drupal\menu_link_content\MenuLinkContentInterface $menu_link */
    $menu_link = $form_obj->getEntity();
    if (!$menu_link->isNew()) {
      $link_url = $menu_link->getUrlObject();
      if ($link_url->isRouted()) {