/**
* Returns the level of this node in the tree
*
* @return int Tree level (1 = top level)
*/
public function getLevel()
{
if ($this->parent === null) {
return 0;
}
return $this->parent->getLevel() + 1;
}
/**
* Constructor.
*
* @param Node $parent (optional) parent node
*/
public function __construct($parent = null)
{
$this->parent = $parent;
if (null !== $parent) {
$this->level = 1 + $parent->getLevel();
}
}
public function getLevel()
{
if ($this->parent) {
return $this->parent->getLevel() + 1;
} else {
return 0;
}
}
/**
* Returns a value indicating if this node is a child of the passed node.
* This just checks the levels of the nodes. If this node is at a greater
* level than the passed node if is a child of it.
*
* @param Node $node
* @return bool TRUE if the node is a child of the passed node, FALSE if not
*/
public function isChildOf($node)
{
return $this->getLevel() > $node->getLevel();
}