public BookOutlineStorage::getBookMenuTree($bid, $parameters, $min_depth, $max_depth)
Builds tree data used for the menu tree.
Parameters
int $bid: The ID of the book that we are building the tree for.
array $parameters: An associative array of build parameters. For info about individual parameters see BookManager::bookTreeBuild().
int $min_depth: The minimum depth of book links in the resulting tree.
int $max_depth: The maximum supported depth of the book tree.
Return value
array Array of loaded book links.
Overrides BookOutlineStorageInterface::getBookMenuTree
File
- core/modules/book/src/BookOutlineStorage.php, line 99
Class
- BookOutlineStorage
- Defines a storage class for books outline.
Namespace
Drupal\book
Code
public function getBookMenuTree($bid, $parameters, $min_depth, $max_depth) {
$query = $this->connection->select('book');
$query->fields('book');
for ($i = 1; $i <= $max_depth; $i++) {
$query->orderBy('p' . $i, 'ASC');
}
$query->condition('bid', $bid);
if (!empty($parameters['expanded'])) {
$query->condition('pid', $parameters['expanded'], 'IN');
}
if ($min_depth != 1) {
$query->condition('depth', $min_depth, '>=');
}
if (isset($parameters['max_depth'])) {
$query->condition('depth', $parameters['max_depth'], '<=');
}
// Add custom query conditions, if any were passed.
if (isset($parameters['conditions'])) {
foreach ($parameters['conditions'] as $column => $value) {
$query->condition($column, $value);
}
}
return $query->execute();
}
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