function book_node_view

Implements hook_ENTITY_TYPE_view() for node entities.

File

core/modules/book/book.module, line 229

Code

function book_node_view(array &$build, EntityInterface $node, EntityViewDisplayInterface $display, $view_mode) {
    if ($view_mode == 'full') {
        if (!empty($node->book['bid']) && empty($node->in_preview)) {
            $book_node = Node::load($node->book['bid']);
            if (!$book_node->access()) {
                return;
            }
            $build['book_navigation'] = [
                '#theme' => 'book_navigation',
                '#book_link' => $node->book,
                '#weight' => 100,
                // The book navigation is a listing of Node entities, so associate its
                // list cache tag for correct invalidation.
'#cache' => [
                    'tags' => $node->getEntityType()
                        ->getListCacheTags(),
                ],
            ];
        }
    }
}