rector/packages/NodeTypeResolver/NodeTypeResolver/PropertyFetchTypeResolver.php

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<?php
declare (strict_types=1);
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namespace Rector\NodeTypeResolver\NodeTypeResolver;
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use PhpParser\Node;
use PhpParser\Node\Expr\PropertyFetch;
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use PhpParser\Node\Stmt\ClassLike;
use PhpParser\Node\Stmt\Trait_;
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use PHPStan\Analyser\Scope;
use PHPStan\Reflection\ReflectionProvider;
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use PHPStan\Type\MixedType;
use PHPStan\Type\ObjectType;
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use PHPStan\Type\Type;
use Rector\NodeNameResolver\NodeNameResolver;
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use Rector\NodeTypeResolver\Contract\NodeTypeResolverInterface;
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use Rector\NodeTypeResolver\Node\AttributeKey;
use Rector\NodeTypeResolver\NodeTypeResolver;
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use Rector\NodeTypeResolver\PHPStan\Collector\TraitNodeScopeCollector;
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/**
* @see \Rector\Tests\NodeTypeResolver\PerNodeTypeResolver\PropertyFetchTypeResolver\PropertyFetchTypeResolverTest
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*/
final class PropertyFetchTypeResolver implements \Rector\NodeTypeResolver\Contract\NodeTypeResolverInterface
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{
/**
* @var NodeTypeResolver
*/
private $nodeTypeResolver;
/**
* @var \Rector\NodeNameResolver\NodeNameResolver
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*/
private $nodeNameResolver;
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/**
* @var \Rector\NodeTypeResolver\PHPStan\Collector\TraitNodeScopeCollector
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*/
private $traitNodeScopeCollector;
/**
* @var \PHPStan\Reflection\ReflectionProvider
*/
private $reflectionProvider;
public function __construct(\Rector\NodeNameResolver\NodeNameResolver $nodeNameResolver, \Rector\NodeTypeResolver\PHPStan\Collector\TraitNodeScopeCollector $traitNodeScopeCollector, \PHPStan\Reflection\ReflectionProvider $reflectionProvider)
{
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$this->nodeNameResolver = $nodeNameResolver;
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$this->traitNodeScopeCollector = $traitNodeScopeCollector;
$this->reflectionProvider = $reflectionProvider;
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}
/**
* @required
*/
public function autowirePropertyFetchTypeResolver(\Rector\NodeTypeResolver\NodeTypeResolver $nodeTypeResolver) : void
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{
$this->nodeTypeResolver = $nodeTypeResolver;
}
/**
* @return array<class-string<Node>>
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*/
public function getNodeClasses() : array
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{
return [\PhpParser\Node\Expr\PropertyFetch::class];
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}
/**
* @param PropertyFetch $node
*/
public function resolve(\PhpParser\Node $node) : \PHPStan\Type\Type
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{
// compensate 3rd party non-analysed property reflection
$vendorPropertyType = $this->getVendorPropertyFetchType($node);
if (!$vendorPropertyType instanceof \PHPStan\Type\MixedType) {
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return $vendorPropertyType;
}
/** @var Scope|null $scope */
$scope = $node->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::SCOPE);
if (!$scope instanceof \PHPStan\Analyser\Scope) {
$classNode = $node->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::CLASS_NODE);
if ($classNode instanceof \PhpParser\Node\Stmt\Trait_) {
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/** @var string $traitName */
$traitName = $classNode->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::CLASS_NAME);
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$scope = $this->traitNodeScopeCollector->getScopeForTraitAndNode($traitName, $node);
}
}
if (!$scope instanceof \PHPStan\Analyser\Scope) {
$classNode = $node->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::CLASS_NODE);
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// fallback to class, since property fetches are not scoped by PHPStan
if ($classNode instanceof \PhpParser\Node\Stmt\ClassLike) {
$scope = $classNode->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::SCOPE);
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}
if (!$scope instanceof \PHPStan\Analyser\Scope) {
return new \PHPStan\Type\MixedType();
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}
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}
return $scope->getType($node);
}
private function getVendorPropertyFetchType(\PhpParser\Node\Expr\PropertyFetch $propertyFetch) : \PHPStan\Type\Type
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{
// 3rd party code
$propertyName = $this->nodeNameResolver->getName($propertyFetch->name);
if ($propertyName === null) {
return new \PHPStan\Type\MixedType();
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}
$varType = $this->nodeTypeResolver->resolve($propertyFetch->var);
if (!$varType instanceof \PHPStan\Type\ObjectType) {
return new \PHPStan\Type\MixedType();
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}
if (!$this->reflectionProvider->hasClass($varType->getClassName())) {
return new \PHPStan\Type\MixedType();
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}
$classReflection = $this->reflectionProvider->getClass($varType->getClassName());
if (!$classReflection->hasProperty($propertyName)) {
return new \PHPStan\Type\MixedType();
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}
$propertyFetchScope = $propertyFetch->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::SCOPE);
if ($propertyFetchScope === null) {
return new \PHPStan\Type\MixedType();
}
$propertyReflection = $classReflection->getProperty($propertyName, $propertyFetchScope);
return $propertyReflection->getReadableType();
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}
}