DowngradeInstanceofStringableRector.php

<?php

declare(strict_types=1);

namespace Rector\DowngradePhp80\Rector\Instanceof_;

use PhpParser\Node;
use PhpParser\Node\Expr\Instanceof_;
use PhpParser\Node\Name\FullyQualified;
use PhpParser\Node\Scalar\String_;
use Rector\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;

/**
 * @see https://wiki.php.net/rfc/stringable
 * @see \Rector\Tests\DowngradePhp80\Rector\Instanceof_\DowngradeInstanceofStringableRector\DowngradeInstanceofStringableRectorTest
 */
final class DowngradeInstanceofStringableRector extends AbstractRector
{
    public function getRuleDefinition(): RuleDefinition
    {
        return new RuleDefinition('change instanceof Stringable to method_exists', [
            new CodeSample(
                <<<'CODE_SAMPLE'
$obj instanceof \Stringable;
CODE_SAMPLE

                ,
                <<<'CODE_SAMPLE'
method_exists($obj, '__toString');
CODE_SAMPLE
            ),
        ]);
    }

    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes(): array
    {
        return [Instanceof_::class];
    }

    /**
     * @param Instanceof_ $node
     */
    public function refactor(Node $node): ?Node
    {
        if (! $node->class instanceof FullyQualified) {
            return null;
        }

        if (! $this->isName($node->class, 'Stringable')) {
            return null;
        }

        return $this->nodeFactory->createFuncCall('method_exists', [$node->expr, new String_('__toString')]);
    }
}