README

This library provides a tree structure via discrete Traits.

It is intended to be used by other libraries.

ChildrenTrait

Add, acces and remove child nodes using this trait.

LookupTrait

Optional methods to inspect the tree.

AttributesTrait

Optional attributes per node.

ToStringTrait

Optional __toString() implementation that outputs the nodes class name and its attributes.

NodeTrait

Combines all of the above traits

Protected Access

The sub-namespace ProtectedAccess contains versions of ChildrenTrait, LookupTrait and AttributesTrait where all methods are protected. This allows fine control over the public API when using the Traits in a library.

Example

// Create a simple tree.
$root = new Node();
$root->setAttribute('name', 'root');

$a = new Node();
$a->setAttribute('name', 'a');
$root->addChild($a);

$b = new Node();
$b->setAttribute('name', 'b');
$root->addChild($b);

$c = new Node();
$c->setAttribute('name', 'c');
$root->addChild($c);


// Find a descendant with the name=b
$bAgain = $root->descendant(function ($node) {
	return $node->getAttribute('name') === 'b';
});

// Get the root node of any node
$rootAgain = $bAgain->findRootNode();

// Remove a node
$bAgain->remove();
$root->removeChild($a);
$root->removeChildAt(0);