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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\PropertyInfo\Extractor;
use phpDocumentor\Reflection\DocBlock;
use phpDocumentor\Reflection\DocBlock\Tags\InvalidTag;
use phpDocumentor\Reflection\DocBlockFactory;
use phpDocumentor\Reflection\DocBlockFactoryInterface;
use phpDocumentor\Reflection\Types\Context;
use phpDocumentor\Reflection\Types\ContextFactory;
use Symfony\Component\PropertyInfo\PropertyDescriptionExtractorInterface;
use Symfony\Component\PropertyInfo\PropertyTypeExtractorInterface;
use Symfony\Component\PropertyInfo\Type;
use Symfony\Component\PropertyInfo\Util\PhpDocTypeHelper;
/**
* Extracts data using a PHPDoc parser.
*
* @author Kévin Dunglas <[email protected]>
*
* @final
*/
class PhpDocExtractor implements PropertyDescriptionExtractorInterface, PropertyTypeExtractorInterface, ConstructorArgumentTypeExtractorInterface
{
public const PROPERTY = 0;
public const ACCESSOR = 1;
public const MUTATOR = 2;
/**
* @var DocBlock[]
*/
private $docBlocks = [];
/**
* @var Context[]
*/
private $contexts = [];
private $docBlockFactory;
private $contextFactory;
private $phpDocTypeHelper;
private $mutatorPrefixes;
private $accessorPrefixes;
private $arrayMutatorPrefixes;
/**
* @param string[]|null $mutatorPrefixes
* @param string[]|null $accessorPrefixes
* @param string[]|null $arrayMutatorPrefixes
*/
public function __construct(DocBlockFactoryInterface $docBlockFactory = null, array $mutatorPrefixes = null, array $accessorPrefixes = null, array $arrayMutatorPrefixes = null)
{
if (!class_exists(DocBlockFactory::class)) {
throw new \LogicException(sprintf('Unable to use the "%s" class as the "phpdocumentor/reflection-docblock" package is not installed.', __CLASS__));
}
$this->docBlockFactory = $docBlockFactory ?: DocBlockFactory::createInstance();
$this->contextFactory = new ContextFactory();
$this->phpDocTypeHelper = new PhpDocTypeHelper();
$this->mutatorPrefixes = $mutatorPrefixes ?? ReflectionExtractor::$defaultMutatorPrefixes;
$this->accessorPrefixes = $accessorPrefixes ?? ReflectionExtractor::$defaultAccessorPrefixes;
$this->arrayMutatorPrefixes = $arrayMutatorPrefixes ?? ReflectionExtractor::$defaultArrayMutatorPrefixes;
}
/**
* {@inheritdoc}
*/
public function getShortDescription(string $class, string $property, array $context = []): ?string
{
/** @var $docBlock DocBlock */
[$docBlock] = $this->getDocBlock($class, $property);
if (!$docBlock) {
return null;
}
$shortDescription = $docBlock->getSummary();
if (!empty($shortDescription)) {
return $shortDescription;
}
foreach ($docBlock->getTagsByName('var') as $var) {
if ($var && !$var instanceof InvalidTag) {
$varDescription = $var->getDescription()->render();
if (!empty($varDescription)) {
return $varDescription;
}
}
}
return null;
}
/**
* {@inheritdoc}
*/
public function getLongDescription(string $class, string $property, array $context = []): ?string
{
/** @var $docBlock DocBlock */
[$docBlock] = $this->getDocBlock($class, $property);
if (!$docBlock) {
return null;
}
$contents = $docBlock->getDescription()->render();
return '' === $contents ? null : $contents;
}
/**
* {@inheritdoc}
*/
public function getTypes(string $class, string $property, array $context = []): ?array
{
/** @var $docBlock DocBlock */
[$docBlock, $source, $prefix] = $this->getDocBlock($class, $property);
if (!$docBlock) {
return null;
}
switch ($source) {
case self::PROPERTY:
$tag = 'var';
break;
case self::ACCESSOR:
$tag = 'return';
break;
case self::MUTATOR:
$tag = 'param';
break;
}
$parentClass = null;
$types = [];
/** @var DocBlock\Tags\Var_|DocBlock\Tags\Return_|DocBlock\Tags\Param $tag */
foreach ($docBlock->getTagsByName($tag) as $tag) {
if ($tag && !$tag instanceof InvalidTag && null !== $tag->getType()) {
foreach ($this->phpDocTypeHelper->getTypes($tag->getType()) as $type) {
switch ($type->getClassName()) {
case 'self':
case 'static':
$resolvedClass = $class;
break;
case 'parent':
if (false !== $resolvedClass = $parentClass ?? $parentClass = get_parent_class($class)) {
break;
}
// no break
default:
$types[] = $type;
continue 2;
}
$types[] = new Type(Type::BUILTIN_TYPE_OBJECT, $type->isNullable(), $resolvedClass, $type->isCollection(), $type->getCollectionKeyTypes(), $type->getCollectionValueTypes());
}
}
}
if (!isset($types[0])) {
return null;
}
if (!\in_array($prefix, $this->arrayMutatorPrefixes)) {
return $types;
}
return [new Type(Type::BUILTIN_TYPE_ARRAY, false, null, true, new Type(Type::BUILTIN_TYPE_INT), $types[0])];
}
/**
* {@inheritdoc}
*/
public function getTypesFromConstructor(string $class, string $property): ?array
{
$docBlock = $this->getDocBlockFromConstructor($class, $property);
if (!$docBlock) {
return null;
}
$types = [];
/** @var DocBlock\Tags\Var_|DocBlock\Tags\Return_|DocBlock\Tags\Param $tag */
foreach ($docBlock->getTagsByName('param') as $tag) {
if ($tag && null !== $tag->getType()) {
$types = array_merge($types, $this->phpDocTypeHelper->getTypes($tag->getType()));
}
}
if (!isset($types[0])) {
return null;
}
return $types;
}
private function getDocBlockFromConstructor(string $class, string $property): ?DocBlock
{
try {
$reflectionClass = new \ReflectionClass($class);
} catch (\ReflectionException $e) {
return null;
}
$reflectionConstructor = $reflectionClass->getConstructor();
if (!$reflectionConstructor) {
return null;
}
try {
$docBlock = $this->docBlockFactory->create($reflectionConstructor, $this->contextFactory->createFromReflector($reflectionConstructor));
return $this->filterDocBlockParams($docBlock, $property);
} catch (\InvalidArgumentException $e) {
return null;
}
}
private function filterDocBlockParams(DocBlock $docBlock, string $allowedParam): DocBlock
{
$tags = array_values(array_filter($docBlock->getTagsByName('param'), function ($tag) use ($allowedParam) {
return $tag instanceof DocBlock\Tags\Param && $allowedParam === $tag->getVariableName();
}));
return new DocBlock($docBlock->getSummary(), $docBlock->getDescription(), $tags, $docBlock->getContext(),
$docBlock->getLocation(), $docBlock->isTemplateStart(), $docBlock->isTemplateEnd());
}
private function getDocBlock(string $class, string $property): array
{
$propertyHash = sprintf('%s::%s', $class, $property);
if (isset($this->docBlocks[$propertyHash])) {
return $this->docBlocks[$propertyHash];
}
$ucFirstProperty = ucfirst($property);
switch (true) {
case $docBlock = $this->getDocBlockFromProperty($class, $property):
$data = [$docBlock, self::PROPERTY, null];
break;
case [$docBlock] = $this->getDocBlockFromMethod($class, $ucFirstProperty, self::ACCESSOR):
$data = [$docBlock, self::ACCESSOR, null];
break;
case [$docBlock, $prefix] = $this->getDocBlockFromMethod($class, $ucFirstProperty, self::MUTATOR):
$data = [$docBlock, self::MUTATOR, $prefix];
break;
default:
$data = [null, null, null];
}
return $this->docBlocks[$propertyHash] = $data;
}
private function getDocBlockFromProperty(string $class, string $property): ?DocBlock
{
// Use a ReflectionProperty instead of $class to get the parent class if applicable
try {
$reflectionProperty = new \ReflectionProperty($class, $property);
} catch (\ReflectionException $e) {
return null;
}
$reflector = $reflectionProperty->getDeclaringClass();
foreach ($reflector->getTraits() as $trait) {
if ($trait->hasProperty($property)) {
return $this->getDocBlockFromProperty($trait->getName(), $property);
}
}
try {
return $this->docBlockFactory->create($reflectionProperty, $this->createFromReflector($reflector));
} catch (\InvalidArgumentException $e) {
return null;
} catch (\RuntimeException $e) {
return null;
}
}
private function getDocBlockFromMethod(string $class, string $ucFirstProperty, int $type): ?array
{
$prefixes = self::ACCESSOR === $type ? $this->accessorPrefixes : $this->mutatorPrefixes;
$prefix = null;
foreach ($prefixes as $prefix) {
$methodName = $prefix.$ucFirstProperty;
try {
$reflectionMethod = new \ReflectionMethod($class, $methodName);
if ($reflectionMethod->isStatic()) {
continue;
}
if (
(self::ACCESSOR === $type && 0 === $reflectionMethod->getNumberOfRequiredParameters()) ||
(self::MUTATOR === $type && $reflectionMethod->getNumberOfParameters() >= 1)
) {
break;
}
} catch (\ReflectionException $e) {
// Try the next prefix if the method doesn't exist
}
}
if (!isset($reflectionMethod)) {
return null;
}
$reflector = $reflectionMethod->getDeclaringClass();
foreach ($reflector->getTraits() as $trait) {
if ($trait->hasMethod($methodName)) {
return $this->getDocBlockFromMethod($trait->getName(), $ucFirstProperty, $type);
}
}
try {
return [$this->docBlockFactory->create($reflectionMethod, $this->createFromReflector($reflector)), $prefix];
} catch (\InvalidArgumentException $e) {
return null;
} catch (\RuntimeException $e) {
return null;
}
}
/**
* Prevents a lot of redundant calls to ContextFactory::createForNamespace().
*/
private function createFromReflector(\ReflectionClass $reflector): Context
{
$cacheKey = $reflector->getNamespaceName().':'.$reflector->getFileName();
if (isset($this->contexts[$cacheKey])) {
return $this->contexts[$cacheKey];
}
$this->contexts[$cacheKey] = $this->contextFactory->createFromReflector($reflector);
return $this->contexts[$cacheKey];
}
}