rector/rules/Php70/Rector/MethodCall/ThisCallOnStaticMethodToStaticCallRector.php

<?php

declare (strict_types=1);
namespace Rector\Php70\Rector\MethodCall;

use PhpParser\Node;
use PhpParser\Node\Expr\MethodCall;
use PhpParser\Node\Expr\Variable;
use PhpParser\Node\Identifier;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassLike;
use PHPStan\Reflection\Php\PhpMethodReflection;
use PHPStan\Reflection\ReflectionProvider;
use PHPStan\Type\ObjectType;
use Rector\Core\Enum\ObjectReference;
use Rector\Core\Rector\AbstractRector;
use Rector\Core\Reflection\ReflectionResolver;
use Rector\Core\ValueObject\PhpVersionFeature;
use Rector\NodeCollector\StaticAnalyzer;
use Rector\VersionBonding\Contract\MinPhpVersionInterface;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
 * @changelog https://3v4l.org/rkiSC
 * @see \Rector\Tests\Php70\Rector\MethodCall\ThisCallOnStaticMethodToStaticCallRector\ThisCallOnStaticMethodToStaticCallRectorTest
 */
final class ThisCallOnStaticMethodToStaticCallRector extends AbstractRector implements MinPhpVersionInterface
{
    /**
     * @readonly
     * @var \Rector\NodeCollector\StaticAnalyzer
     */
    private $staticAnalyzer;
    /**
     * @readonly
     * @var \Rector\Core\Reflection\ReflectionResolver
     */
    private $reflectionResolver;
    /**
     * @readonly
     * @var \PHPStan\Reflection\ReflectionProvider
     */
    private $reflectionProvider;
    public function __construct(StaticAnalyzer $staticAnalyzer, ReflectionResolver $reflectionResolver, ReflectionProvider $reflectionProvider)
    {
        $this->staticAnalyzer = $staticAnalyzer;
        $this->reflectionResolver = $reflectionResolver;
        $this->reflectionProvider = $reflectionProvider;
    }
    public function provideMinPhpVersion() : int
    {
        return PhpVersionFeature::STATIC_CALL_ON_NON_STATIC;
    }
    public function getRuleDefinition() : RuleDefinition
    {
        return new RuleDefinition('Changes $this->call() to static method to static call', [new CodeSample(<<<'CODE_SAMPLE'
class SomeClass
{
    public static function run()
    {
        $this->eat();
    }

    public static function eat()
    {
    }
}
CODE_SAMPLE
, <<<'CODE_SAMPLE'
class SomeClass
{
    public static function run()
    {
        static::eat();
    }

    public static function eat()
    {
    }
}
CODE_SAMPLE
)]);
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes() : array
    {
        return [MethodCall::class];
    }
    /**
     * @param MethodCall $node
     */
    public function refactor(Node $node) : ?Node
    {
        if (!$node->var instanceof Variable) {
            return null;
        }
        if (!$this->nodeNameResolver->isName($node->var, 'this')) {
            return null;
        }
        if (!$node->name instanceof Identifier) {
            return null;
        }
        $methodName = $this->getName($node->name);
        if ($methodName === null) {
            return null;
        }
        // skip PHPUnit calls, as they accept both self:: and $this-> formats
        if ($this->isObjectType($node->var, new ObjectType('PHPUnit\\Framework\\TestCase'))) {
            return null;
        }
        $classLike = $this->betterNodeFinder->findParentType($node, ClassLike::class);
        if (!$classLike instanceof ClassLike) {
            return null;
        }
        $className = (string) $this->nodeNameResolver->getName($classLike);
        if (!$this->reflectionProvider->hasClass($className)) {
            return null;
        }
        $classReflection = $this->reflectionProvider->getClass($className);
        $isStaticMethod = $this->staticAnalyzer->isStaticMethod($classReflection, $methodName);
        if (!$isStaticMethod) {
            return null;
        }
        if ($node->isFirstClassCallable()) {
            return null;
        }
        $objectReference = $this->resolveClassSelf($node);
        return $this->nodeFactory->createStaticCall($objectReference, $methodName, $node->args);
    }
    /**
     * @return ObjectReference::STATIC|ObjectReference::SELF
     */
    private function resolveClassSelf(MethodCall $methodCall) : string
    {
        $classLike = $this->betterNodeFinder->findParentType($methodCall, Class_::class);
        if (!$classLike instanceof Class_) {
            return ObjectReference::STATIC;
        }
        if ($classLike->isFinal()) {
            return ObjectReference::SELF;
        }
        $methodReflection = $this->reflectionResolver->resolveMethodReflectionFromMethodCall($methodCall);
        if (!$methodReflection instanceof PhpMethodReflection) {
            return ObjectReference::STATIC;
        }
        if (!$methodReflection->isPrivate()) {
            return ObjectReference::STATIC;
        }
        return ObjectReference::SELF;
    }
}