414 lines
18 KiB
PHP
414 lines
18 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\VarExporter;
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use Symfony\Component\VarExporter\Exception\LogicException;
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use Symfony\Component\VarExporter\Internal\Hydrator;
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use Symfony\Component\VarExporter\Internal\LazyObjectRegistry;
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/**
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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final class ProxyHelper
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{
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/**
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* Helps generate lazy-loading ghost objects.
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*
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* @throws LogicException When the class is incompatible with ghost objects
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*/
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public static function generateLazyGhost(\ReflectionClass $class): string
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{
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if (\PHP_VERSION_ID < 80300 && $class->isReadOnly()) {
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throw new LogicException(sprintf('Cannot generate lazy ghost with PHP < 8.3: class "%s" is readonly.', $class->name));
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}
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if ($class->isFinal()) {
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throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" is final.', $class->name));
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}
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if ($class->isInterface() || $class->isAbstract()) {
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throw new LogicException(sprintf('Cannot generate lazy ghost: "%s" is not a concrete class.', $class->name));
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}
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if (\stdClass::class !== $class->name && $class->isInternal()) {
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throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" is internal.', $class->name));
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}
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if ($class->hasMethod('__get') && 'mixed' !== (self::exportType($class->getMethod('__get')) ?? 'mixed')) {
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throw new LogicException(sprintf('Cannot generate lazy ghost: return type of method "%s::__get()" should be "mixed".', $class->name));
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}
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static $traitMethods;
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$traitMethods ??= (new \ReflectionClass(LazyGhostTrait::class))->getMethods();
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foreach ($traitMethods as $method) {
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if ($class->hasMethod($method->name) && $class->getMethod($method->name)->isFinal()) {
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throw new LogicException(sprintf('Cannot generate lazy ghost: method "%s::%s()" is final.', $class->name, $method->name));
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}
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}
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$parent = $class;
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while ($parent = $parent->getParentClass()) {
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if (\stdClass::class !== $parent->name && $parent->isInternal()) {
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throw new LogicException(sprintf('Cannot generate lazy ghost: class "%s" extends "%s" which is internal.', $class->name, $parent->name));
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}
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}
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$propertyScopes = self::exportPropertyScopes($class->name);
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return <<<EOPHP
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extends \\{$class->name} implements \Symfony\Component\VarExporter\LazyObjectInterface
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{
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use \Symfony\Component\VarExporter\LazyGhostTrait;
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private const LAZY_OBJECT_PROPERTY_SCOPES = {$propertyScopes};
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}
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// Help opcache.preload discover always-needed symbols
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class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
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class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
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class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
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EOPHP;
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}
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/**
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* Helps generate lazy-loading virtual proxies.
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*
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* @param \ReflectionClass[] $interfaces
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*
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* @throws LogicException When the class is incompatible with virtual proxies
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*/
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public static function generateLazyProxy(?\ReflectionClass $class, array $interfaces = []): string
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{
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if (!class_exists($class?->name ?? \stdClass::class, false)) {
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throw new LogicException(sprintf('Cannot generate lazy proxy: "%s" is not a class.', $class->name));
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}
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if ($class?->isFinal()) {
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throw new LogicException(sprintf('Cannot generate lazy proxy: class "%s" is final.', $class->name));
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}
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if (\PHP_VERSION_ID < 80300 && $class?->isReadOnly()) {
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throw new LogicException(sprintf('Cannot generate lazy proxy with PHP < 8.3: class "%s" is readonly.', $class->name));
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}
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$methodReflectors = [$class?->getMethods(\ReflectionMethod::IS_PUBLIC | \ReflectionMethod::IS_PROTECTED) ?? []];
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foreach ($interfaces as $interface) {
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if (!$interface->isInterface()) {
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throw new LogicException(sprintf('Cannot generate lazy proxy: "%s" is not an interface.', $interface->name));
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}
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$methodReflectors[] = $interface->getMethods();
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}
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$methodReflectors = array_merge(...$methodReflectors);
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$extendsInternalClass = false;
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if ($parent = $class) {
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do {
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$extendsInternalClass = \stdClass::class !== $parent->name && $parent->isInternal();
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} while (!$extendsInternalClass && $parent = $parent->getParentClass());
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}
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$methodsHaveToBeProxied = $extendsInternalClass;
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$methods = [];
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foreach ($methodReflectors as $method) {
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if ('__get' !== strtolower($method->name) || 'mixed' === ($type = self::exportType($method) ?? 'mixed')) {
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continue;
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}
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$methodsHaveToBeProxied = true;
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$trait = new \ReflectionMethod(LazyProxyTrait::class, '__get');
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$body = \array_slice(file($trait->getFileName()), $trait->getStartLine() - 1, $trait->getEndLine() - $trait->getStartLine());
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$body[0] = str_replace('): mixed', '): '.$type, $body[0]);
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$methods['__get'] = strtr(implode('', $body).' }', [
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'Hydrator' => '\\'.Hydrator::class,
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'Registry' => '\\'.LazyObjectRegistry::class,
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]);
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break;
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}
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foreach ($methodReflectors as $method) {
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if (($method->isStatic() && !$method->isAbstract()) || isset($methods[$lcName = strtolower($method->name)])) {
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continue;
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}
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if ($method->isFinal()) {
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if ($extendsInternalClass || $methodsHaveToBeProxied || method_exists(LazyProxyTrait::class, $method->name)) {
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throw new LogicException(sprintf('Cannot generate lazy proxy: method "%s::%s()" is final.', $class->name, $method->name));
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}
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continue;
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}
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if (method_exists(LazyProxyTrait::class, $method->name) || ($method->isProtected() && !$method->isAbstract())) {
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continue;
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}
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$signature = self::exportSignature($method, true, $args);
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$parentCall = $method->isAbstract() ? "throw new \BadMethodCallException('Cannot forward abstract method \"{$method->class}::{$method->name}()\".')" : "parent::{$method->name}({$args})";
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if ($method->isStatic()) {
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$body = " $parentCall;";
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} elseif (str_ends_with($signature, '): never') || str_ends_with($signature, '): void')) {
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$body = <<<EOPHP
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if (isset(\$this->lazyObjectState)) {
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(\$this->lazyObjectState->realInstance ??= (\$this->lazyObjectState->initializer)())->{$method->name}({$args});
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} else {
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{$parentCall};
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}
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EOPHP;
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} else {
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if (!$methodsHaveToBeProxied && !$method->isAbstract()) {
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// Skip proxying methods that might return $this
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foreach (preg_split('/[()|&]++/', self::exportType($method) ?? 'static') as $type) {
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if (\in_array($type = ltrim($type, '?'), ['static', 'object'], true)) {
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continue 2;
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}
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foreach ([$class, ...$interfaces] as $r) {
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if ($r && is_a($r->name, $type, true)) {
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continue 3;
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}
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}
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}
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}
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$body = <<<EOPHP
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if (isset(\$this->lazyObjectState)) {
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return (\$this->lazyObjectState->realInstance ??= (\$this->lazyObjectState->initializer)())->{$method->name}({$args});
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}
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return {$parentCall};
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EOPHP;
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}
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$methods[$lcName] = " {$signature}\n {\n{$body}\n }";
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}
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$types = $interfaces = array_unique(array_column($interfaces, 'name'));
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$interfaces[] = LazyObjectInterface::class;
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$interfaces = implode(', \\', $interfaces);
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$parent = $class ? ' extends \\'.$class->name : '';
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array_unshift($types, $class ? 'parent' : '');
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$type = ltrim(implode('&\\', $types), '&');
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if (!$class) {
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$trait = new \ReflectionMethod(LazyProxyTrait::class, 'initializeLazyObject');
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$body = \array_slice(file($trait->getFileName()), $trait->getStartLine() - 1, $trait->getEndLine() - $trait->getStartLine());
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$body[0] = str_replace('): parent', '): '.$type, $body[0]);
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$methods = ['initializeLazyObject' => implode('', $body).' }'] + $methods;
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}
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$body = $methods ? "\n".implode("\n\n", $methods)."\n" : '';
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$propertyScopes = $class ? self::exportPropertyScopes($class->name) : '[]';
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if (
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$class?->hasMethod('__unserialize')
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&& !$class->getMethod('__unserialize')->getParameters()[0]->getType()
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) {
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// fix contravariance type problem when $class declares a `__unserialize()` method without typehint.
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$lazyProxyTraitStatement = <<<EOPHP
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use \Symfony\Component\VarExporter\LazyProxyTrait {
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__unserialize as private __doUnserialize;
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}
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EOPHP;
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$body .= <<<EOPHP
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public function __unserialize(\$data): void
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{
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\$this->__doUnserialize(\$data);
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}
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EOPHP;
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} else {
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$lazyProxyTraitStatement = <<<EOPHP
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use \Symfony\Component\VarExporter\LazyProxyTrait;
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EOPHP;
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}
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return <<<EOPHP
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{$parent} implements \\{$interfaces}
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{
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{$lazyProxyTraitStatement}
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private const LAZY_OBJECT_PROPERTY_SCOPES = {$propertyScopes};
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{$body}}
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// Help opcache.preload discover always-needed symbols
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class_exists(\Symfony\Component\VarExporter\Internal\Hydrator::class);
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class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectRegistry::class);
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class_exists(\Symfony\Component\VarExporter\Internal\LazyObjectState::class);
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EOPHP;
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}
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public static function exportSignature(\ReflectionFunctionAbstract $function, bool $withParameterTypes = true, ?string &$args = null): string
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{
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$byRefIndex = 0;
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$args = '';
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$param = null;
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$parameters = [];
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$namespace = $function instanceof \ReflectionMethod ? $function->class : $function->getNamespaceName().'\\';
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$namespace = substr($namespace, 0, strrpos($namespace, '\\') ?: 0);
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foreach ($function->getParameters() as $param) {
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$parameters[] = ($param->getAttributes(\SensitiveParameter::class) ? '#[\SensitiveParameter] ' : '')
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.($withParameterTypes && $param->hasType() ? self::exportType($param).' ' : '')
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.($param->isPassedByReference() ? '&' : '')
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.($param->isVariadic() ? '...' : '').'$'.$param->name
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.($param->isOptional() && !$param->isVariadic() ? ' = '.self::exportDefault($param, $namespace) : '');
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if ($param->isPassedByReference()) {
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$byRefIndex = 1 + $param->getPosition();
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}
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$args .= ($param->isVariadic() ? '...$' : '$').$param->name.', ';
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}
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if (!$param || !$byRefIndex) {
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$args = '...\func_get_args()';
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} elseif ($param->isVariadic()) {
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$args = substr($args, 0, -2);
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} else {
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$args = explode(', ', $args, 1 + $byRefIndex);
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$args[$byRefIndex] = sprintf('...\array_slice(\func_get_args(), %d)', $byRefIndex);
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$args = implode(', ', $args);
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}
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$signature = 'function '.($function->returnsReference() ? '&' : '')
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.($function->isClosure() ? '' : $function->name).'('.implode(', ', $parameters).')';
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if ($function instanceof \ReflectionMethod) {
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$signature = ($function->isPublic() ? 'public ' : ($function->isProtected() ? 'protected ' : 'private '))
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.($function->isStatic() ? 'static ' : '').$signature;
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}
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if ($function->hasReturnType()) {
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$signature .= ': '.self::exportType($function);
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}
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static $getPrototype;
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$getPrototype ??= (new \ReflectionMethod(\ReflectionMethod::class, 'getPrototype'))->invoke(...);
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while ($function) {
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if ($function->hasTentativeReturnType()) {
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return '#[\ReturnTypeWillChange] '.$signature;
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}
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try {
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$function = $function instanceof \ReflectionMethod && $function->isAbstract() ? false : $getPrototype($function);
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} catch (\ReflectionException) {
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break;
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}
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}
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return $signature;
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}
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public static function exportType(\ReflectionFunctionAbstract|\ReflectionProperty|\ReflectionParameter $owner, bool $noBuiltin = false, ?\ReflectionType $type = null): ?string
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{
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if (!$type ??= $owner instanceof \ReflectionFunctionAbstract ? $owner->getReturnType() : $owner->getType()) {
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return null;
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}
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$class = null;
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$types = [];
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if ($type instanceof \ReflectionUnionType) {
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$reflectionTypes = $type->getTypes();
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$glue = '|';
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} elseif ($type instanceof \ReflectionIntersectionType) {
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$reflectionTypes = $type->getTypes();
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$glue = '&';
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} else {
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$reflectionTypes = [$type];
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$glue = null;
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}
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foreach ($reflectionTypes as $type) {
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if ($type instanceof \ReflectionIntersectionType) {
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if ('' !== $name = '('.self::exportType($owner, $noBuiltin, $type).')') {
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$types[] = $name;
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}
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continue;
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}
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$name = $type->getName();
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if ($noBuiltin && $type->isBuiltin()) {
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continue;
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}
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if (\in_array($name, ['parent', 'self'], true) && $class ??= $owner->getDeclaringClass()) {
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$name = 'parent' === $name ? ($class->getParentClass() ?: null)?->name ?? 'parent' : $class->name;
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}
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$types[] = ($noBuiltin || $type->isBuiltin() || 'static' === $name ? '' : '\\').$name;
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}
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if (!$types) {
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return '';
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}
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|
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if (null === $glue) {
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|
|
return (!$noBuiltin && $type->allowsNull() && !\in_array($name, ['mixed', 'null'], true) ? '?' : '').$types[0];
|
||
|
|
}
|
||
|
|
sort($types);
|
||
|
|
|
||
|
|
return implode($glue, $types);
|
||
|
|
}
|
||
|
|
|
||
|
|
private static function exportPropertyScopes(string $parent): string
|
||
|
|
{
|
||
|
|
$propertyScopes = Hydrator::$propertyScopes[$parent] ??= Hydrator::getPropertyScopes($parent);
|
||
|
|
uksort($propertyScopes, 'strnatcmp');
|
||
|
|
foreach ($propertyScopes as $k => $v) {
|
||
|
|
unset($propertyScopes[$k][3]);
|
||
|
|
}
|
||
|
|
$propertyScopes = VarExporter::export($propertyScopes);
|
||
|
|
$propertyScopes = str_replace(VarExporter::export($parent), 'parent::class', $propertyScopes);
|
||
|
|
$propertyScopes = preg_replace("/(?|(,)\n( ) |\n |,\n (\]))/", '$1$2', $propertyScopes);
|
||
|
|
$propertyScopes = str_replace("\n", "\n ", $propertyScopes);
|
||
|
|
|
||
|
|
return $propertyScopes;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static function exportDefault(\ReflectionParameter $param, $namespace): string
|
||
|
|
{
|
||
|
|
$default = rtrim(substr(explode('$'.$param->name.' = ', (string) $param, 2)[1] ?? '', 0, -2));
|
||
|
|
|
||
|
|
if (\in_array($default, ['<default>', 'NULL'], true)) {
|
||
|
|
return 'null';
|
||
|
|
}
|
||
|
|
if (str_ends_with($default, "...'") && preg_match("/^'(?:[^'\\\\]*+(?:\\\\.)*+)*+'$/", $default)) {
|
||
|
|
return VarExporter::export($param->getDefaultValue());
|
||
|
|
}
|
||
|
|
|
||
|
|
$regexp = "/(\"(?:[^\"\\\\]*+(?:\\\\.)*+)*+\"|'(?:[^'\\\\]*+(?:\\\\.)*+)*+')/";
|
||
|
|
$parts = preg_split($regexp, $default, -1, \PREG_SPLIT_DELIM_CAPTURE | \PREG_SPLIT_NO_EMPTY);
|
||
|
|
|
||
|
|
$regexp = '/([\[\( ]|^)([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z0-9_\x7f-\xff]++)*+)(\(?)(?!: )/';
|
||
|
|
$callback = (false !== strpbrk($default, "\\:('") && $class = $param->getDeclaringClass())
|
||
|
|
? fn ($m) => $m[1].match ($m[2]) {
|
||
|
|
'new', 'false', 'true', 'null' => $m[2],
|
||
|
|
'NULL' => 'null',
|
||
|
|
'self' => '\\'.$class->name,
|
||
|
|
'namespace\\parent',
|
||
|
|
'parent' => ($parent = $class->getParentClass()) ? '\\'.$parent->name : 'parent',
|
||
|
|
default => self::exportSymbol($m[2], '(' !== $m[3], $namespace),
|
||
|
|
}.$m[3]
|
||
|
|
: fn ($m) => $m[1].match ($m[2]) {
|
||
|
|
'new', 'false', 'true', 'null', 'self', 'parent' => $m[2],
|
||
|
|
'NULL' => 'null',
|
||
|
|
default => self::exportSymbol($m[2], '(' !== $m[3], $namespace),
|
||
|
|
}.$m[3];
|
||
|
|
|
||
|
|
return implode('', array_map(fn ($part) => match ($part[0]) {
|
||
|
|
'"' => $part, // for internal classes only
|
||
|
|
"'" => false !== strpbrk($part, "\\\0\r\n") ? '"'.substr(str_replace(['$', "\0", "\r", "\n"], ['\$', '\0', '\r', '\n'], $part), 1, -1).'"' : $part,
|
||
|
|
default => preg_replace_callback($regexp, $callback, $part),
|
||
|
|
}, $parts));
|
||
|
|
}
|
||
|
|
|
||
|
|
private static function exportSymbol(string $symbol, bool $mightBeRootConst, string $namespace): string
|
||
|
|
{
|
||
|
|
if (!$mightBeRootConst
|
||
|
|
|| false === ($ns = strrpos($symbol, '\\'))
|
||
|
|
|| substr($symbol, 0, $ns) !== $namespace
|
||
|
|
|| \defined($symbol)
|
||
|
|
|| !\defined(substr($symbol, $ns + 1))
|
||
|
|
) {
|
||
|
|
return '\\'.$symbol;
|
||
|
|
}
|
||
|
|
|
||
|
|
return '\\'.substr($symbol, $ns + 1);
|
||
|
|
}
|
||
|
|
}
|