class WorkspacesHooks

class WorkspacesHooks {
    use StringTranslationTrait;
    public function __construct(WorkspaceManagerInterface $workspaceManager, WorkspaceInformationInterface $workspaceInfo, EntityDefinitionUpdateManagerInterface $entityDefinitionUpdateManager, CacheTagsInvalidatorInterface $cacheTagsInvalidator) {
    }
    
    /**
     * Implements hook_help().
     */
    public function help(string $route_name, RouteMatchInterface $route_match) : string {
        $output = '';
        switch ($route_name) {
            // Main module help for the Workspaces module.
            case 'help.page.workspaces':
                $output = '';
                $output .= '<h2>' . $this->t('About') . '</h2>';
                $output .= '<p>' . $this->t('The Workspaces module allows workspaces to be defined and switched between. Content is then assigned to the active workspace when created. For more information, see the <a href=":workspaces">online documentation for the Workspaces module</a>.', [
                    ':workspaces' => 'https://www.drupal.org/docs/8/core/modules/workspace/overview',
                ]) . '</p>';
                break;
        }
        return $output;
    }
    
    /**
     * Implements hook_module_preinstall().
     */
    public function modulePreinstall(string $module) : void {
        if ($module !== 'workspaces') {
            return;
        }
        foreach ($this->entityDefinitionUpdateManager
            ->getEntityTypes() as $entity_type) {
            if ($this->workspaceInfo
                ->isEntityTypeSupported($entity_type)) {
                $entity_type->setRevisionMetadataKey('workspace', 'workspace');
                $this->entityDefinitionUpdateManager
                    ->updateEntityType($entity_type);
            }
        }
    }
    
    /**
     * Implements hook_ENTITY_TYPE_update() for 'menu_link_content' entities.
     */
    public function menuLinkContentUpdate(EntityInterface $entity) : void {
        
        /** @var \Drupal\menu_link_content\MenuLinkContentInterface $entity */
        if ($entity->getLoadedRevisionId() != $entity->getRevisionId()) {
            // We are not updating the menu tree definitions when a custom menu link
            // entity is saved as a pending revision (because the parent can not be
            // changed), so we need to clear the system menu cache manually. However,
            // inserting or deleting a custom menu link updates the menu tree
            // definitions, so we don't have to do anything in those cases.
            $cache_tags = Cache::buildTags('config:system.menu', [
                $entity->getMenuName(),
            ], '.');
            $this->cacheTagsInvalidator
                ->invalidateTags($cache_tags);
        }
    }
    
    /**
     * Implements hook_cron().
     */
    public function cron() : void {
        $this->workspaceManager
            ->purgeDeletedWorkspacesBatch();
    }

}