rector/rules/Php55/Rector/ClassConstFetch/StaticToSelfOnFinalClassRector.php

<?php

declare (strict_types=1);
namespace Rector\Php55\Rector\ClassConstFetch;

use PhpParser\Node;
use PhpParser\Node\Expr\ClassConstFetch;
use PhpParser\Node\Stmt\Class_;
use Rector\Enum\ObjectReference;
use Rector\Rector\AbstractRector;
use Rector\ValueObject\PhpVersionFeature;
use Rector\VersionBonding\Contract\MinPhpVersionInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
 * @changelog https://wiki.php.net/rfc/class_name_scalars
 * @changelog https://3v4l.org/AHr9C#v5.5.0
 * @see \Rector\Tests\Php55\Rector\ClassConstFetch\StaticToSelfOnFinalClassRector\StaticToSelfOnFinalClassRectorTest
 */
final class StaticToSelfOnFinalClassRector extends AbstractRector implements MinPhpVersionInterface
{
    public function getRuleDefinition() : RuleDefinition
    {
        return new RuleDefinition('Change `static::class` to `self::class` on final class', [new CodeSample(<<<'CODE_SAMPLE'
final class SomeClass
{
   public function callOnMe()
   {
       var_dump(static::class);
   }
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
final class SomeClass
{
   public function callOnMe()
   {
       var_dump(self::class);
   }
}
CODE_SAMPLE
)]);
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes() : array
    {
        return [Class_::class];
    }
    /**
     * @param Class_ $node
     */
    public function refactor(Node $node) : ?Class_
    {
        if (!$node->isFinal()) {
            return null;
        }
        $hasChanged = \false;
        $this->traverseNodesWithCallable($node, function (Node $node) use(&$hasChanged) : ?ClassConstFetch {
            if (!$node instanceof ClassConstFetch) {
                return null;
            }
            if (!$this->isName($node->class, ObjectReference::STATIC)) {
                return null;
            }
            if (!$this->isName($node->name, 'class')) {
                return null;
            }
            $hasChanged = \true;
            return $this->nodeFactory->createSelfFetchConstant('class');
        });
        if ($hasChanged) {
            return $node;
        }
        return null;
    }
    public function provideMinPhpVersion() : int
    {
        return PhpVersionFeature::CLASSNAME_CONSTANT;
    }
}