rector/rules/Php81/Rector/Property/ReadOnlyPropertyRector.php

<?php

declare (strict_types=1);
namespace Rector\Php81\Rector\Property;

use PhpParser\Node;
use PhpParser\Node\Param;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\Property;
use Rector\Core\NodeManipulator\PropertyManipulator;
use Rector\Core\Rector\AbstractRector;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
 * @changelog https://wiki.php.net/rfc/readonly_properties_v2
 *
 * @see \Rector\Tests\Php81\Rector\Property\ReadOnlyPropertyRector\ReadOnlyPropertyRectorTest
 */
final class ReadOnlyPropertyRector extends \Rector\Core\Rector\AbstractRector
{
    /**
     * @var \Rector\Core\NodeManipulator\PropertyManipulator
     */
    private $propertyManipulator;
    public function __construct(\Rector\Core\NodeManipulator\PropertyManipulator $propertyManipulator)
    {
        $this->propertyManipulator = $propertyManipulator;
    }
    public function getRuleDefinition() : \Symplify\RuleDocGenerator\ValueObject\RuleDefinition
    {
        return new \Symplify\RuleDocGenerator\ValueObject\RuleDefinition('Decorate read-only property with `readonly` attribute', [new \Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample(<<<'CODE_SAMPLE'
class SomeClass
{
    public function __construct(
        private string $name
    ) {
    }

    public function getName()
    {
        return $this->name;
    }
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
class SomeClass
{
    public function __construct(
        private readonly string $name
    ) {
    }

    public function getName()
    {
        return $this->name;
    }
}
CODE_SAMPLE
)]);
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes() : array
    {
        return [\PhpParser\Node\Stmt\Property::class, \PhpParser\Node\Param::class];
    }
    /**
     * @param Property|Param $node
     */
    public function refactor(\PhpParser\Node $node) : ?\PhpParser\Node
    {
        if ($node instanceof \PhpParser\Node\Param) {
            return $this->refactorParam($node);
        }
        // 1. is property read-only?
        if ($this->propertyManipulator->isPropertyChangeableExceptConstructor($node)) {
            return null;
        }
        if ($node->isReadonly()) {
            return null;
        }
        $this->visibilityManipulator->makeReadonly($node);
        return $node;
    }
    /**
     * @return \PhpParser\Node\Param|null
     */
    private function refactorParam(\PhpParser\Node\Param $param)
    {
        if ($param->flags === 0) {
            return null;
        }
        // promoted property?
        if ($this->propertyManipulator->isPropertyChangeableExceptConstructor($param)) {
            return null;
        }
        if ($this->visibilityManipulator->hasVisibility($param, \PhpParser\Node\Stmt\Class_::MODIFIER_READONLY)) {
            return null;
        }
        $this->visibilityManipulator->makeReadonly($param);
        return $param;
    }
}