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<?php declare (strict_types=1); namespace Rector\CodeQuality\Rector\Isset_; use PhpParser\Node; use PhpParser\Node\Arg; use PhpParser\Node\Expr; use PhpParser\Node\Expr\BinaryOp\BooleanAnd; use PhpParser\Node\Expr\BinaryOp\NotIdentical; use PhpParser\Node\Expr\Isset_; use PhpParser\Node\Expr\PropertyFetch; use PhpParser\Node\Expr\Variable; use PhpParser\Node\Scalar\String_; use PHPStan\Reflection\Php\PhpPropertyReflection; use PHPStan\Reflection\ReflectionProvider; use PHPStan\Type\MixedType; use PHPStan\Type\TypeWithClassName; use Rector\Core\Rector\AbstractRector; use Rector\Core\Reflection\ReflectionResolver; use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; /** * @see \Rector\Tests\CodeQuality\Rector\Isset_\IssetOnPropertyObjectToPropertyExistsRector\IssetOnPropertyObjectToPropertyExistsRectorTest * * @changelog https://3v4l.org/TI8XL Change isset on property object to property_exists() with not null check */ final class IssetOnPropertyObjectToPropertyExistsRector extends AbstractRector { /** * @readonly * @var \PHPStan\Reflection\ReflectionProvider */ private $reflectionProvider; /** * @readonly * @var \Rector\Core\Reflection\ReflectionResolver */ private $reflectionResolver; public function __construct(ReflectionProvider $reflectionProvider, ReflectionResolver $reflectionResolver) { $this->reflectionProvider = $reflectionProvider; $this->reflectionResolver = $reflectionResolver; } public function getRuleDefinition() : RuleDefinition { return new RuleDefinition('Change isset on property object to property_exists() and not null check', [new CodeSample(<<<'CODE_SAMPLE' class SomeClass { private $x; public function run(): void { isset($this->x); } } CODE_SAMPLE , <<<'CODE_SAMPLE' class SomeClass { private $x; public function run(): void { property_exists($this, 'x') && $this->x !== null; } } CODE_SAMPLE )]); } /** * @return array<class-string<Node>> */ public function getNodeTypes() : array { return [Isset_::class]; } /** * @param Isset_ $node */ public function refactor(Node $node) : ?Node { $newNodes = []; foreach ($node->vars as $issetVar) { if (!$issetVar instanceof PropertyFetch) { continue; } // Ignore dynamically accessed properties ($o->$p) if ($issetVar->name instanceof Variable) { continue; } // has property PHP 7.4 type? if ($this->hasPropertyTypeDeclaration($issetVar)) { continue; } $propertyFetchName = $this->getName($issetVar->name); if ($propertyFetchName === null) { continue; } $propertyFetchVarType = $this->getType($issetVar->var); if ($propertyFetchVarType instanceof TypeWithClassName) { if (!$this->reflectionProvider->hasClass($propertyFetchVarType->getClassName())) { continue; } $classReflection = $this->reflectionProvider->getClass($propertyFetchVarType->getClassName()); if (!$classReflection->hasProperty($propertyFetchName) || $classReflection->isBuiltin()) { $newNodes[] = $this->replaceToPropertyExistsWithNullCheck($issetVar->var, $propertyFetchName, $issetVar); } else { $newNodes[] = $this->createNotIdenticalToNull($issetVar); } } else { $newNodes[] = $this->replaceToPropertyExistsWithNullCheck($issetVar->var, $propertyFetchName, $issetVar); } } return $this->nodeFactory->createReturnBooleanAnd($newNodes); } private function replaceToPropertyExistsWithNullCheck(Expr $expr, string $property, PropertyFetch $propertyFetch) : BooleanAnd { $args = [new Arg($expr), new Arg(new String_($property))]; $propertyExistsFuncCall = $this->nodeFactory->createFuncCall('property_exists', $args); return new BooleanAnd($propertyExistsFuncCall, $this->createNotIdenticalToNull($propertyFetch)); } private function createNotIdenticalToNull(PropertyFetch $propertyFetch) : NotIdentical { return new NotIdentical($propertyFetch, $this->nodeFactory->createNull()); } private function hasPropertyTypeDeclaration(PropertyFetch $propertyFetch) : bool { $phpPropertyReflection = $this->reflectionResolver->resolvePropertyReflectionFromPropertyFetch($propertyFetch); if (!$phpPropertyReflection instanceof PhpPropertyReflection) { return \false; } return !$phpPropertyReflection->getNativeType() instanceof MixedType; } }
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