Humbug\PhpScoper\NodeVisitor\AppendParentNode

Complexity

Total Complexity

6

Size/Duplication

Total Lines	47
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	hasParent()	0	4	1
A	getParent()	0	4	1
A	beforeTraverse()	0	4	1
A	enterNode()	0	10	2
A	leaveNode()	0	4	1

<?php

declare(strict_types=1);

/*
 * This file is part of the humbug/php-scoper package.
 *
 * Copyright (c) 2017 Théo FIDRY <theo.fidry@gmail.com>,
 *                    Pádraic Brady <padraic.brady@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Humbug\PhpScoper\NodeVisitor;

use PhpParser\Node;
use PhpParser\NodeVisitorAbstract;

/**
 * Appends the parent node as an attribute to each node. This allows to have more context in the other visitors when
 * inspecting a node.
 */
final class AppendParentNode extends NodeVisitorAbstract
{
    /** @private */
    const PARENT_ATTRIBUTE = 'parent';

    private $stack;

    public static function hasParent(Node $node): bool
    {
        return $node->hasAttribute(self::PARENT_ATTRIBUTE);
    }

    public static function getParent(Node $node): Node
    {
        return $node->getAttribute(self::PARENT_ATTRIBUTE);
    }

    /**
     * @inheritdoc
     */
    public function beforeTraverse(array $nodes)
    {
        $this->stack = [];
    }

    /**
     * @inheritdoc
     */
    public function enterNode(Node $node): Node
    {
        if (!empty($this->stack)) {
            $node->setAttribute(self::PARENT_ATTRIBUTE, $this->stack[count($this->stack) - 1]);
        }

        $this->stack[] = $node;

        return $node;
    }

    /**
     * @inheritdoc
     */
    public function leaveNode(Node $node)
    {
        array_pop($this->stack);
    }
}