/**
* Get node children
*
* This function returns the tree branch holdning the designated node
* and its children
* <br/>Example:
* <code>
* $content = new EfrontContentTree(4); //Create the content tree for lesson with id 4
* $content -> getChildren(54); //Get node's 54 children
* </code>
* The function uses RecursiveArrayIterator :: getChildren() to get the branch
*
* @param mixed $node Either the node id or an EfrontNode object
* @return RecursiveArrayIterator The tree branch
* @since 3.5.0
* @access public
* @see RecursiveArrayIterator :: getChildren()
*/
public function getNodeChildren($node)
{
$node instanceof ArrayObject ? $nodeId = $node['id'] : ($nodeId = $node);
$iterator = new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($this->tree), RecursiveIteratorIterator::SELF_FIRST));
//Create iterators for the tree
$iterator->rewind();
//Initialize iterator
while ($iterator->valid() && $iterator->key() != $nodeId) {
//Advance iterator until we reach the designated node
$iterator->next();
}
if ($iterator->valid()) {
//If we found the designated node
return $iterator->getChildren();
} else {
throw new EfrontTreeException(_NODEDOESNOTEXIST . ': ' . $nodeId, EfrontTreeException::NODE_NOT_EXISTS);
}
}
