MakeUnusedClassesWithChildrenAbstractRector.php

<?php

declare(strict_types=1);

namespace Rector\Privatization\Rector\Class_;

use PhpParser\Node;
use PhpParser\Node\Stmt\Class_;
use Rector\Core\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;

/**
 * @see \Rector\Tests\Privatization\Rector\Class_\MakeUnusedClassesWithChildrenAbstractRector\MakeUnusedClassesWithChildrenAbstractRectorTest
 */
final class MakeUnusedClassesWithChildrenAbstractRector extends AbstractRector
{
    public function getRuleDefinition(): RuleDefinition
    {
        return new RuleDefinition(
            'Classes that have no children nor are used, should have abstract',
            [
                new CodeSample(
                    <<<'CODE_SAMPLE'
class SomeClass extends PossibleAbstractClass
{
}

class PossibleAbstractClass
{
}
CODE_SAMPLE
                    ,
                    <<<'CODE_SAMPLE'
class SomeClass extends PossibleAbstractClass
{
}

abstract class PossibleAbstractClass
{
}
CODE_SAMPLE
            ),
            ]);
    }

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

    /**
     * @param Class_ $node
     */
    public function refactor(Node $node): ?Node
    {
        $className = $this->getName($node);
        if ($className === null) {
            return null;
        }
        $nodeRepositoryFindMethodCallsOnClass = $this->nodeRepository->findMethodCallsOnClass($className);

        // 1. is in static call?
        if ($nodeRepositoryFindMethodCallsOnClass !== []) {
            return null;
        }
        $parsedNodeCollectorFindNewsByClass = $this->nodeRepository->findNewsByClass($className);

        // 2. is in new?
        if ($parsedNodeCollectorFindNewsByClass !== []) {
            return null;
        }
        $nodeRepositoryFindChildrenOfClass = $this->nodeRepository->findChildrenOfClass($className);

        // 3. does it have any children
        if ($nodeRepositoryFindChildrenOfClass === []) {
            return null;
        }

        // is abstract!
        if ($node->isAbstract()) {
            return null;
        }

        $this->visibilityManipulator->makeAbstract($node);

        return $node;
    }
}