/**
* Fetches the book link for the next page of the book.
*
* @param array $book_link
* A fully loaded book link that is part of the book hierarchy.
*
* @return array
* A fully loaded book link for the page after the one represented in
* $book_link.
*/
public function nextLink(array $book_link)
{
// Assigning the array to $flat resets the array pointer for use with each().
$flat = $this->bookManager->bookTreeGetFlat($book_link);
do {
list($key, ) = each($flat);
} while ($key && $key != $book_link['nid']);
if ($key == $book_link['nid']) {
$next = current($flat);
if ($next) {
$this->bookManager->bookLinkTranslate($next);
}
return $next;
}
}
