public BookOutlineStorage::getChildRelativeDepth($book_link, $max_depth)
Gets child relative depth.
Parameters
array $book_link: The book link.
int $max_depth: The maximum supported depth of the book tree.
Return value
int The depth of the searched book.
Overrides BookOutlineStorageInterface::getChildRelativeDepth
File
- core/modules/book/src/BookOutlineStorage.php, line 61
Class
- BookOutlineStorage
- Defines a storage class for books outline.
Namespace
Drupal\book
Code
public function getChildRelativeDepth($book_link, $max_depth) {
$query = $this->connection->select('book');
$query->addField('book', 'depth');
$query->condition('bid', $book_link['bid']);
$query->orderBy('depth', 'DESC');
$query->range(0, 1);
$i = 1;
$p = 'p1';
while ($i <= $max_depth && $book_link[$p]) {
$query->condition($p, $book_link[$p]);
$p = 'p' . ++$i;
}
return $query->execute()->fetchField();
}
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