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- <?php
- /**
- * @file
- * Allows administrators to create custom menu links.
- */
- use Drupal\Core\Entity\EntityInterface;
- use Drupal\Core\Routing\RouteMatchInterface;
- use Drupal\system\MenuInterface;
- /**
- * Implements hook_help().
- */
- function menu_link_content_help($route_name, RouteMatchInterface $route_match) {
- switch ($route_name) {
- case 'help.page.menu_link_content':
- $output = '';
- $output .= '<h3>' . t('About') . '</h3>';
- $output .= '<p>' . t('The Custom Menu Links module allows users to create menu links. These links can be translated if multiple languages are used for the site.');
- if (\Drupal::moduleHandler()->moduleExists('menu_ui')) {
- $output .= ' ' . t('It is required by the Menu UI module, which provides an interface for managing menus and menu links. For more information, see the <a href=":menu-help">Menu UI module help page</a> and the <a href=":drupal-org-help">online documentation for the Custom Menu Links module</a>.', [':menu-help' => \Drupal::url('help.page', ['name' => 'menu_ui']), ':drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link']);
- }
- else {
- $output .= ' ' . t('For more information, see the <a href=":drupal-org-help">online documentation for the Custom Menu Links module</a>. If you enable the Menu UI module, it provides an interface for managing menus and menu links.', [':drupal-org-help' => 'https://www.drupal.org/documentation/modules/menu_link']);
- }
- $output .= '</p>';
- return $output;
- }
- }
- /**
- * Implements hook_menu_delete().
- */
- function menu_link_content_menu_delete(MenuInterface $menu) {
- $storage = \Drupal::entityManager()->getStorage('menu_link_content');
- $menu_links = $storage->loadByProperties(['menu_name' => $menu->id()]);
- $storage->delete($menu_links);
- }
- /**
- * Implements hook_path_insert().
- */
- function menu_link_content_path_insert($path) {
- _menu_link_content_update_path_alias($path['alias']);
- }
- /**
- * Helper function to update plugin definition using internal scheme.
- *
- * @param string $path
- * The path alias.
- */
- function _menu_link_content_update_path_alias($path) {
- /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
- $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
- /** @var \Drupal\menu_link_content\MenuLinkContentInterface[] $entities */
- $entities = \Drupal::entityManager()
- ->getStorage('menu_link_content')
- ->loadByProperties(['link.uri' => 'internal:' . $path]);
- foreach ($entities as $menu_link) {
- $menu_link_manager->updateDefinition($menu_link->getPluginId(), $menu_link->getPluginDefinition(), FALSE);
- }
- }
- /**
- * Implements hook_path_update().
- */
- function menu_link_content_path_update($path) {
- if ($path['alias'] != $path['original']['alias']) {
- _menu_link_content_update_path_alias($path['alias']);
- _menu_link_content_update_path_alias($path['original']['alias']);
- }
- elseif ($path['source'] != $path['original']['source']) {
- _menu_link_content_update_path_alias($path['alias']);
- }
- }
- /**
- * Implements hook_path_delete().
- */
- function menu_link_content_path_delete($path) {
- _menu_link_content_update_path_alias($path['alias']);
- }
- /**
- * Implements hook_entity_predelete().
- */
- function menu_link_content_entity_predelete(EntityInterface $entity) {
- /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
- $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
- $entity_type_id = $entity->getEntityTypeId();
- foreach ($entity->uriRelationships() as $rel) {
- $url = $entity->toUrl($rel);
- $route_parameters = $url->getRouteParameters();
- if (!isset($route_parameters[$entity_type_id])) {
- // Do not delete links which do not relate to this exact entity. For
- // example, "collection", "add-form", etc.
- continue;
- }
- // Delete all MenuLinkContent links that point to this entity route.
- $result = $menu_link_manager->loadLinksByRoute($url->getRouteName(), $route_parameters);
- if ($result) {
- foreach ($result as $id => $instance) {
- if ($instance->isDeletable() && strpos($id, 'menu_link_content:') === 0) {
- $instance->deleteLink();
- }
- }
- }
- }
- }
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