public function testGetFirstNodeName()
{
// not empty node
$result = TreeUtils::getFirstNodeName(self::getTestGroup());
$this->assertEquals('node1', $result);
// empty node
$result = TreeUtils::getFirstNodeName(new GroupNodeDefinition('some_name'));
$this->assertNull($result);
}
/**
* {@inheritdoc}
*/
public function getSubtree($subtreeRootName)
{
if (!isset($this->processedSubTrees[$subtreeRootName])) {
$treeData = $this->getTree();
$subtree = TreeUtils::findNodeByName($treeData, $subtreeRootName);
if ($subtree === null) {
throw new ItemNotFoundException(sprintf('Subtree "%s" not found', $subtreeRootName));
}
$this->processedSubTrees[$subtreeRootName] = $subtree;
}
return $this->processedSubTrees[$subtreeRootName];
}
/**
* {@inheritdoc}
*/
public function chooseActiveGroups($activeGroup, $activeSubGroup)
{
$tree = $this->getTree();
if ($activeGroup === null) {
$activeGroup = TreeUtils::getFirstNodeName($tree);
}
// we can find active subgroup only in case if group is specified
if ($activeSubGroup === null && $activeGroup) {
$subtree = TreeUtils::findNodeByName($tree, $activeGroup);
if ($subtree instanceof GroupNodeDefinition) {
$subGroups = TreeUtils::getByNestingLevel($subtree, 2);
if ($subGroups instanceof GroupNodeDefinition) {
$activeSubGroup = TreeUtils::getFirstNodeName($subGroups);
}
}
}
return array($activeGroup, $activeSubGroup);
}
