TestNodeVisitor.php

<?php

namespace Drupal\sdc_other_node_visitor\Twig\NodeVisitor;

use Drupal\sdc_other_node_visitor\Twig\Profiler\EnterProfileNode;
use Drupal\sdc_other_node_visitor\Twig\Profiler\LeaveProfileNode;
use Twig\Environment;
use Twig\Node\ModuleNode;
use Twig\Node\Node;
use Twig\NodeVisitor\NodeVisitorInterface;

/**
 * A node visitor that adds nodes to the Twig template.
 *
 * Most of this code is copied from
 * Twig\Profiler\NodeVisitor\ProfilerNodeVisitor.
 */
final class TestNodeVisitor implements NodeVisitorInterface {
    private string $extensionName;
    private string $varName;
    
    /**
     * TestNodeVisitor constructor.
     *
     * @param string $extensionName
     *   The name of the extension.
     */
    public function __construct(string $extensionName) {
        $this->extensionName = $extensionName;
        $this->varName = sprintf('__internal_%s', hash(\PHP_VERSION_ID < 80100 ? 'sha256' : 'xxh128', $extensionName));
    }
    
    /**
     * {@inheritdoc}
     */
    public function enterNode(Node $node, Environment $env) : Node {
        return $node;
    }
    
    /**
     * {@inheritdoc}
     */
    public function leaveNode(Node $node, Environment $env) : ?Node {
        if ($node instanceof ModuleNode) {
            $node->setNode('display_start', new Node([
                new EnterProfileNode($this->extensionName, $this->varName),
                $node->getNode('display_start'),
            ]));
            $node->setNode('display_end', new Node([
                new LeaveProfileNode($this->varName),
                $node->getNode('display_end'),
            ]));
        }
        return $node;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getPriority() : int {
        return 0;
    }

}