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<?php declare(strict_types = 1);
namespace PHPStan\Dependency;
use PhpParser\Node;
use PhpParser\Node\Expr\Array_;
use PhpParser\Node\Expr\ArrayDimFetch;
use PhpParser\Node\Expr\Closure;
use PhpParser\Node\Name;
use PhpParser\Node\Stmt\Foreach_;
use PHPStan\Analyser\Scope;
use PHPStan\Broker\ClassNotFoundException;
use PHPStan\Broker\FunctionNotFoundException;
use PHPStan\File\FileHelper;
use PHPStan\Node\InClassMethodNode;
use PHPStan\Node\InFunctionNode;
use PHPStan\Reflection\ClassReflection;
use PHPStan\Reflection\FunctionReflection;
use PHPStan\Reflection\ParametersAcceptorSelector;
use PHPStan\Reflection\ParametersAcceptorWithPhpDocs;
use PHPStan\Reflection\ReflectionProvider;
use PHPStan\Type\ClosureType;
use PHPStan\Type\Constant\ConstantStringType;
use PHPStan\Type\Type;
use function array_merge;
use function count;
class DependencyResolver
{
public function __construct(
private FileHelper $fileHelper,
private ReflectionProvider $reflectionProvider,
private ExportedNodeResolver $exportedNodeResolver,
)
{
}
public function resolveDependencies(Node $node, Scope $scope): NodeDependencies
{
$dependenciesReflections = [];
if ($node instanceof Node\Stmt\Class_) {
if ($node->extends !== null) {
$this->addClassToDependencies($node->extends->toString(), $dependenciesReflections);
}
foreach ($node->implements as $className) {
$this->addClassToDependencies($className->toString(), $dependenciesReflections);
}
} elseif ($node instanceof Node\Stmt\Interface_) {
foreach ($node->extends as $className) {
$this->addClassToDependencies($className->toString(), $dependenciesReflections);
}
} elseif ($node instanceof Node\Stmt\Enum_) {
foreach ($node->implements as $className) {
$this->addClassToDependencies($className->toString(), $dependenciesReflections);
}
} elseif ($node instanceof InClassMethodNode) {
$nativeMethod = $scope->getFunction();
if ($nativeMethod !== null) {
$parametersAcceptor = ParametersAcceptorSelector::selectSingle($nativeMethod->getVariants());
$this->extractThrowType($nativeMethod->getThrowType(), $dependenciesReflections);
if ($parametersAcceptor instanceof ParametersAcceptorWithPhpDocs) {
$this->extractFromParametersAcceptor($parametersAcceptor, $dependenciesReflections);
}
}
} elseif ($node instanceof InFunctionNode) {
$functionReflection = $scope->getFunction();
if ($functionReflection !== null) {
$this->extractThrowType($functionReflection->getThrowType(), $dependenciesReflections);
$parametersAcceptor = ParametersAcceptorSelector::selectSingle($functionReflection->getVariants());
if ($parametersAcceptor instanceof ParametersAcceptorWithPhpDocs) {
$this->extractFromParametersAcceptor($parametersAcceptor, $dependenciesReflections);
}
}
} elseif ($node instanceof Closure) {
/** @var ClosureType $closureType */
$closureType = $scope->getType($node);
foreach ($closureType->getParameters() as $parameter) {
$referencedClasses = $parameter->getType()->getReferencedClasses();
foreach ($referencedClasses as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
$returnTypeReferencedClasses = $closureType->getReturnType()->getReferencedClasses();
foreach ($returnTypeReferencedClasses as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
} elseif ($node instanceof Node\Expr\FuncCall) {
$functionName = $node->name;
if ($functionName instanceof Node\Name) {
try {
$dependenciesReflections[] = $this->getFunctionReflection($functionName, $scope);
} catch (FunctionNotFoundException) {
// pass
}
} else {
$calledType = $scope->getType($functionName);
if ($calledType->isCallable()->yes()) {
$variants = $calledType->getCallableParametersAcceptors($scope);
foreach ($variants as $variant) {
$referencedClasses = $variant->getReturnType()->getReferencedClasses();
foreach ($referencedClasses as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
}
}
$returnType = $scope->getType($node);
foreach ($returnType->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
} elseif ($node instanceof Node\Expr\MethodCall || $node instanceof Node\Expr\PropertyFetch) {
$classNames = $scope->getType($node->var)->getReferencedClasses();
foreach ($classNames as $className) {
$this->addClassToDependencies($className, $dependenciesReflections);
}
$returnType = $scope->getType($node);
foreach ($returnType->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
} elseif (
$node instanceof Node\Expr\StaticCall
|| $node instanceof Node\Expr\ClassConstFetch
|| $node instanceof Node\Expr\StaticPropertyFetch
) {
if ($node->class instanceof Node\Name) {
$this->addClassToDependencies($scope->resolveName($node->class), $dependenciesReflections);
} else {
foreach ($scope->getType($node->class)->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
$returnType = $scope->getType($node);
foreach ($returnType->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
} elseif (
$node instanceof Node\Expr\New_
&& $node->class instanceof Node\Name
) {
$this->addClassToDependencies($scope->resolveName($node->class), $dependenciesReflections);
} elseif ($node instanceof Node\Stmt\TraitUse) {
foreach ($node->traits as $traitName) {
$this->addClassToDependencies($traitName->toString(), $dependenciesReflections);
}
} elseif ($node instanceof Node\Expr\Instanceof_) {
if ($node->class instanceof Name) {
$this->addClassToDependencies($scope->resolveName($node->class), $dependenciesReflections);
}
} elseif ($node instanceof Node\Stmt\Catch_) {
foreach ($node->types as $type) {
$this->addClassToDependencies($scope->resolveName($type), $dependenciesReflections);
}
} elseif ($node instanceof ArrayDimFetch && $node->dim !== null) {
$varType = $scope->getType($node->var);
$dimType = $scope->getType($node->dim);
foreach ($varType->getOffsetValueType($dimType)->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
} elseif ($node instanceof Foreach_) {
$exprType = $scope->getType($node->expr);
if ($node->keyVar !== null) {
foreach ($exprType->getIterableKeyType()->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
foreach ($exprType->getIterableValueType()->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
} elseif (
$node instanceof Array_
&& $this->considerArrayForCallableTest($scope, $node)
) {
$arrayType = $scope->getType($node);
if (!$arrayType->isCallable()->no()) {
foreach ($arrayType->getCallableParametersAcceptors($scope) as $variant) {
$referencedClasses = $variant->getReturnType()->getReferencedClasses();
foreach ($referencedClasses as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
}
}
return new NodeDependencies($this->fileHelper, $dependenciesReflections, $this->exportedNodeResolver->resolve($scope->getFile(), $node));
}
private function considerArrayForCallableTest(Scope $scope, Array_ $arrayNode): bool
{
$items = $arrayNode->items;
if (count($items) !== 2) {
return false;
}
if ($items[0] === null) {
return false;
}
$itemType = $scope->getType($items[0]->value);
if (!$itemType instanceof ConstantStringType) {
return false;
}
return $itemType->isClassString();
}
/**
* @param array<int, ClassReflection|FunctionReflection> $dependenciesReflections
*/
private function addClassToDependencies(string $className, array &$dependenciesReflections): void
{
try {
$classReflection = $this->reflectionProvider->getClass($className);
} catch (ClassNotFoundException) {
return;
}
do {
$dependenciesReflections[] = $classReflection;
foreach ($classReflection->getInterfaces() as $interface) {
$dependenciesReflections[] = $interface;
}
foreach ($classReflection->getTraits() as $trait) {
$dependenciesReflections[] = $trait;
}
$classReflection = $classReflection->getParentClass();
} while ($classReflection !== null);
}
private function getFunctionReflection(Node\Name $nameNode, ?Scope $scope): FunctionReflection
{
return $this->reflectionProvider->getFunction($nameNode, $scope);
}
/**
* @param array<ClassReflection|FunctionReflection> $dependenciesReflections
*/
private function extractFromParametersAcceptor(
ParametersAcceptorWithPhpDocs $parametersAcceptor,
array &$dependenciesReflections,
): void
{
foreach ($parametersAcceptor->getParameters() as $parameter) {
$referencedClasses = array_merge(
$parameter->getNativeType()->getReferencedClasses(),
$parameter->getPhpDocType()->getReferencedClasses(),
);
foreach ($referencedClasses as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
$returnTypeReferencedClasses = array_merge(
$parametersAcceptor->getNativeReturnType()->getReferencedClasses(),
$parametersAcceptor->getPhpDocReturnType()->getReferencedClasses(),
);
foreach ($returnTypeReferencedClasses as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
/**
* @param array<ClassReflection|FunctionReflection> $dependenciesReflections
*/
private function extractThrowType(
?Type $throwType,
array &$dependenciesReflections,
): void
{
if ($throwType === null) {
return;
}
foreach ($throwType->getReferencedClasses() as $referencedClass) {
$this->addClassToDependencies($referencedClass, $dependenciesReflections);
}
}
}