public function add($parentId, Branch $branch)
{
$this->branches[$branch->getNodeId()] = $branch;
if (null === $this->root) {
$this->root = $parentId ? $this->branches[$parentId] = new UnknownNodeBranch($branch) : $branch;
} else {
if (false === isset($this->branches[$parentId])) {
// hidden from nav, don’t return the whole section then:
return $this;
}
$this->branches[$parentId]->add($branch);
}
return $this;
}
/**
* @param Branch $branch
* @param Branch $currentBranch
*
* @return array
* @throws \Exception
*/
public function getPreviousSibling(Branch $branch, Branch $currentBranch)
{
$current = null;
$previousSibiling = null;
foreach ($branch->getChildren() as $node) {
if ($node->getNodeId() === $currentBranch->getNodeId()) {
$current = $node;
}
if (!$current) {
$previousSibiling = $node;
}
if ($previousSibiling && $current) {
break;
}
}
return $previousSibiling;
}
