File "AutowirePass.php"
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\DependencyInjection\Compiler;
use Symfony\Component\Config\Resource\ClassExistenceResource;
use Symfony\Component\DependencyInjection\Argument\ServiceLocatorArgument;
use Symfony\Component\DependencyInjection\Argument\TaggedIteratorArgument;
use Symfony\Component\DependencyInjection\Attribute\TaggedIterator;
use Symfony\Component\DependencyInjection\Attribute\TaggedLocator;
use Symfony\Component\DependencyInjection\Attribute\Target;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Exception\AutowiringFailedException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
use Symfony\Component\DependencyInjection\LazyProxy\ProxyHelper;
use Symfony\Component\DependencyInjection\TypedReference;
/**
* Inspects existing service definitions and wires the autowired ones using the type hints of their classes.
*
* @author Kévin Dunglas <dunglas@gmail.com>
* @author Nicolas Grekas <p@tchwork.com>
*/
class AutowirePass extends AbstractRecursivePass
{
private $types;
private $ambiguousServiceTypes;
private $autowiringAliases;
private $lastFailure;
private $throwOnAutowiringException;
private $decoratedClass;
private $decoratedId;
private $methodCalls;
private $defaultArgument;
private $getPreviousValue;
private $decoratedMethodIndex;
private $decoratedMethodArgumentIndex;
private $typesClone;
private $combinedAliases;
public function __construct(bool $throwOnAutowireException = true)
{
$this->throwOnAutowiringException = $throwOnAutowireException;
$this->defaultArgument = new class() {
public $value;
public $names;
};
}
/**
* {@inheritdoc}
*/
public function process(ContainerBuilder $container)
{
$this->populateCombinedAliases($container);
try {
$this->typesClone = clone $this;
parent::process($container);
} finally {
$this->decoratedClass = null;
$this->decoratedId = null;
$this->methodCalls = null;
$this->defaultArgument->names = null;
$this->getPreviousValue = null;
$this->decoratedMethodIndex = null;
$this->decoratedMethodArgumentIndex = null;
$this->typesClone = null;
$this->combinedAliases = [];
}
}
/**
* {@inheritdoc}
*/
protected function processValue($value, bool $isRoot = false)
{
try {
return $this->doProcessValue($value, $isRoot);
} catch (AutowiringFailedException $e) {
if ($this->throwOnAutowiringException) {
throw $e;
}
$this->container->getDefinition($this->currentId)->addError($e->getMessageCallback() ?? $e->getMessage());
return parent::processValue($value, $isRoot);
}
}
/**
* @return mixed
*/
private function doProcessValue($value, bool $isRoot = false)
{
if ($value instanceof TypedReference) {
if ($ref = $this->getAutowiredReference($value, true)) {
return $ref;
}
if (ContainerBuilder::RUNTIME_EXCEPTION_ON_INVALID_REFERENCE === $value->getInvalidBehavior()) {
$message = $this->createTypeNotFoundMessageCallback($value, 'it');
// since the error message varies by referenced id and $this->currentId, so should the id of the dummy errored definition
$this->container->register($id = sprintf('.errored.%s.%s', $this->currentId, (string) $value), $value->getType())
->addError($message);
return new TypedReference($id, $value->getType(), $value->getInvalidBehavior(), $value->getName());
}
}
$value = parent::processValue($value, $isRoot);
if (!$value instanceof Definition || !$value->isAutowired() || $value->isAbstract() || !$value->getClass()) {
return $value;
}
if (!$reflectionClass = $this->container->getReflectionClass($value->getClass(), false)) {
$this->container->log($this, sprintf('Skipping service "%s": Class or interface "%s" cannot be loaded.', $this->currentId, $value->getClass()));
return $value;
}
$this->methodCalls = $value->getMethodCalls();
try {
$constructor = $this->getConstructor($value, false);
} catch (RuntimeException $e) {
throw new AutowiringFailedException($this->currentId, $e->getMessage(), 0, $e);
}
if ($constructor) {
array_unshift($this->methodCalls, [$constructor, $value->getArguments()]);
}
$checkAttributes = 80000 <= \PHP_VERSION_ID && !$value->hasTag('container.ignore_attributes');
$this->methodCalls = $this->autowireCalls($reflectionClass, $isRoot, $checkAttributes);
if ($constructor) {
[, $arguments] = array_shift($this->methodCalls);
if ($arguments !== $value->getArguments()) {
$value->setArguments($arguments);
}
}
if ($this->methodCalls !== $value->getMethodCalls()) {
$value->setMethodCalls($this->methodCalls);
}
return $value;
}
private function autowireCalls(\ReflectionClass $reflectionClass, bool $isRoot, bool $checkAttributes): array
{
$this->decoratedId = null;
$this->decoratedClass = null;
$this->getPreviousValue = null;
if ($isRoot && ($definition = $this->container->getDefinition($this->currentId)) && null !== ($this->decoratedId = $definition->innerServiceId) && $this->container->has($this->decoratedId)) {
$this->decoratedClass = $this->container->findDefinition($this->decoratedId)->getClass();
}
$patchedIndexes = [];
foreach ($this->methodCalls as $i => $call) {
[$method, $arguments] = $call;
if ($method instanceof \ReflectionFunctionAbstract) {
$reflectionMethod = $method;
} else {
$definition = new Definition($reflectionClass->name);
try {
$reflectionMethod = $this->getReflectionMethod($definition, $method);
} catch (RuntimeException $e) {
if ($definition->getFactory()) {
continue;
}
throw $e;
}
}
$arguments = $this->autowireMethod($reflectionMethod, $arguments, $checkAttributes, $i);
if ($arguments !== $call[1]) {
$this->methodCalls[$i][1] = $arguments;
$patchedIndexes[] = $i;
}
}
// use named arguments to skip complex default values
foreach ($patchedIndexes as $i) {
$namedArguments = null;
$arguments = $this->methodCalls[$i][1];
foreach ($arguments as $j => $value) {
if ($namedArguments && !$value instanceof $this->defaultArgument) {
unset($arguments[$j]);
$arguments[$namedArguments[$j]] = $value;
}
if ($namedArguments || !$value instanceof $this->defaultArgument) {
continue;
}
if (\PHP_VERSION_ID >= 80100 && (\is_array($value->value) ? $value->value : \is_object($value->value))) {
unset($arguments[$j]);
$namedArguments = $value->names;
} else {
$arguments[$j] = $value->value;
}
}
$this->methodCalls[$i][1] = $arguments;
}
return $this->methodCalls;
}
/**
* Autowires the constructor or a method.
*
* @throws AutowiringFailedException
*/
private function autowireMethod(\ReflectionFunctionAbstract $reflectionMethod, array $arguments, bool $checkAttributes, int $methodIndex): array
{
$class = $reflectionMethod instanceof \ReflectionMethod ? $reflectionMethod->class : $this->currentId;
$method = $reflectionMethod->name;
$parameters = $reflectionMethod->getParameters();
if ($reflectionMethod->isVariadic()) {
array_pop($parameters);
}
$this->defaultArgument->names = new \ArrayObject();
foreach ($parameters as $index => $parameter) {
$this->defaultArgument->names[$index] = $parameter->name;
if (\array_key_exists($parameter->name, $arguments)) {
$arguments[$index] = $arguments[$parameter->name];
unset($arguments[$parameter->name]);
}
if (\array_key_exists($index, $arguments) && '' !== $arguments[$index]) {
continue;
}
$type = ProxyHelper::getTypeHint($reflectionMethod, $parameter, true);
if ($checkAttributes) {
foreach ($parameter->getAttributes() as $attribute) {
if (TaggedIterator::class === $attribute->getName()) {
$attribute = $attribute->newInstance();
$arguments[$index] = new TaggedIteratorArgument($attribute->tag, $attribute->indexAttribute, $attribute->defaultIndexMethod, false, $attribute->defaultPriorityMethod);
break;
}
if (TaggedLocator::class === $attribute->getName()) {
$attribute = $attribute->newInstance();
$arguments[$index] = new ServiceLocatorArgument(new TaggedIteratorArgument($attribute->tag, $attribute->indexAttribute, $attribute->defaultIndexMethod, true, $attribute->defaultPriorityMethod));
break;
}
}
if ('' !== ($arguments[$index] ?? '')) {
continue;
}
}
if (!$type) {
if (isset($arguments[$index])) {
continue;
}
// no default value? Then fail
if (!$parameter->isDefaultValueAvailable()) {
// For core classes, isDefaultValueAvailable() can
// be false when isOptional() returns true. If the
// argument *is* optional, allow it to be missing
if ($parameter->isOptional()) {
--$index;
break;
}
$type = ProxyHelper::getTypeHint($reflectionMethod, $parameter, false);
$type = $type ? sprintf('is type-hinted "%s"', ltrim($type, '\\')) : 'has no type-hint';
throw new AutowiringFailedException($this->currentId, sprintf('Cannot autowire service "%s": argument "$%s" of method "%s()" %s, you should configure its value explicitly.', $this->currentId, $parameter->name, $class !== $this->currentId ? $class.'::'.$method : $method, $type));
}
// specifically pass the default value
$arguments[$index] = clone $this->defaultArgument;
$arguments[$index]->value = $parameter->getDefaultValue();
continue;
}
$getValue = function () use ($type, $parameter, $class, $method) {
if (!$value = $this->getAutowiredReference($ref = new TypedReference($type, $type, ContainerBuilder::EXCEPTION_ON_INVALID_REFERENCE, Target::parseName($parameter)), true)) {
$failureMessage = $this->createTypeNotFoundMessageCallback($ref, sprintf('argument "$%s" of method "%s()"', $parameter->name, $class !== $this->currentId ? $class.'::'.$method : $method));
if ($parameter->isDefaultValueAvailable()) {
$value = clone $this->defaultArgument;
$value->value = $parameter->getDefaultValue();
} elseif (!$parameter->allowsNull()) {
throw new AutowiringFailedException($this->currentId, $failureMessage);
}
}
return $value;
};
if ($this->decoratedClass && $isDecorated = is_a($this->decoratedClass, $type, true)) {
if ($this->getPreviousValue) {
// The inner service is injected only if there is only 1 argument matching the type of the decorated class
// across all arguments of all autowired methods.
// If a second matching argument is found, the default behavior is restored.
$getPreviousValue = $this->getPreviousValue;
$this->methodCalls[$this->decoratedMethodIndex][1][$this->decoratedMethodArgumentIndex] = $getPreviousValue();
$this->decoratedClass = null; // Prevent further checks
} else {
$arguments[$index] = new TypedReference($this->decoratedId, $this->decoratedClass);
$this->getPreviousValue = $getValue;
$this->decoratedMethodIndex = $methodIndex;
$this->decoratedMethodArgumentIndex = $index;
continue;
}
}
$arguments[$index] = $getValue();
}
if ($parameters && !isset($arguments[++$index])) {
while (0 <= --$index) {
if (!$arguments[$index] instanceof $this->defaultArgument) {
break;
}
unset($arguments[$index]);
}
}
// it's possible index 1 was set, then index 0, then 2, etc
// make sure that we re-order so they're injected as expected
ksort($arguments, \SORT_NATURAL);
return $arguments;
}
/**
* Returns a reference to the service matching the given type, if any.
*/
private function getAutowiredReference(TypedReference $reference, bool $filterType): ?TypedReference
{
$this->lastFailure = null;
$type = $reference->getType();
if ($type !== (string) $reference) {
return $reference;
}
if ($filterType && false !== $m = strpbrk($type, '&|')) {
$types = array_diff(explode($m[0], $type), ['int', 'string', 'array', 'bool', 'float', 'iterable', 'object', 'callable', 'null']);
sort($types);
$type = implode($m[0], $types);
}
if (null !== $name = $reference->getName()) {
if ($this->container->has($alias = $type.' $'.$name) && !$this->container->findDefinition($alias)->isAbstract()) {
return new TypedReference($alias, $type, $reference->getInvalidBehavior());
}
if (null !== ($alias = $this->combinedAliases[$alias] ?? null) && !$this->container->findDefinition($alias)->isAbstract()) {
return new TypedReference($alias, $type, $reference->getInvalidBehavior());
}
if ($this->container->has($name) && !$this->container->findDefinition($name)->isAbstract()) {
foreach ($this->container->getAliases() + $this->combinedAliases as $id => $alias) {
if ($name === (string) $alias && str_starts_with($id, $type.' $')) {
return new TypedReference($name, $type, $reference->getInvalidBehavior());
}
}
}
}
if ($this->container->has($type) && !$this->container->findDefinition($type)->isAbstract()) {
return new TypedReference($type, $type, $reference->getInvalidBehavior());
}
if (null !== ($alias = $this->combinedAliases[$type] ?? null) && !$this->container->findDefinition($alias)->isAbstract()) {
return new TypedReference($alias, $type, $reference->getInvalidBehavior());
}
return null;
}
/**
* Populates the list of available types.
*/
private function populateAvailableTypes(ContainerBuilder $container)
{
$this->types = [];
$this->ambiguousServiceTypes = [];
$this->autowiringAliases = [];
foreach ($container->getDefinitions() as $id => $definition) {
$this->populateAvailableType($container, $id, $definition);
}
foreach ($container->getAliases() as $id => $alias) {
$this->populateAutowiringAlias($id);
}
}
/**
* Populates the list of available types for a given definition.
*/
private function populateAvailableType(ContainerBuilder $container, string $id, Definition $definition)
{
// Never use abstract services
if ($definition->isAbstract()) {
return;
}
if ('' === $id || '.' === $id[0] || $definition->isDeprecated() || !$reflectionClass = $container->getReflectionClass($definition->getClass(), false)) {
return;
}
foreach ($reflectionClass->getInterfaces() as $reflectionInterface) {
$this->set($reflectionInterface->name, $id);
}
do {
$this->set($reflectionClass->name, $id);
} while ($reflectionClass = $reflectionClass->getParentClass());
$this->populateAutowiringAlias($id);
}
/**
* Associates a type and a service id if applicable.
*/
private function set(string $type, string $id)
{
// is this already a type/class that is known to match multiple services?
if (isset($this->ambiguousServiceTypes[$type])) {
$this->ambiguousServiceTypes[$type][] = $id;
return;
}
// check to make sure the type doesn't match multiple services
if (!isset($this->types[$type]) || $this->types[$type] === $id) {
$this->types[$type] = $id;
return;
}
// keep an array of all services matching this type
if (!isset($this->ambiguousServiceTypes[$type])) {
$this->ambiguousServiceTypes[$type] = [$this->types[$type]];
unset($this->types[$type]);
}
$this->ambiguousServiceTypes[$type][] = $id;
}
private function createTypeNotFoundMessageCallback(TypedReference $reference, string $label): \Closure
{
if (null === $this->typesClone->container) {
$this->typesClone->container = new ContainerBuilder($this->container->getParameterBag());
$this->typesClone->container->setAliases($this->container->getAliases());
$this->typesClone->container->setDefinitions($this->container->getDefinitions());
$this->typesClone->container->setResourceTracking(false);
}
$currentId = $this->currentId;
return (function () use ($reference, $label, $currentId) {
return $this->createTypeNotFoundMessage($reference, $label, $currentId);
})->bindTo($this->typesClone);
}
private function createTypeNotFoundMessage(TypedReference $reference, string $label, string $currentId): string
{
if (!$r = $this->container->getReflectionClass($type = $reference->getType(), false)) {
// either $type does not exist or a parent class does not exist
try {
$resource = new ClassExistenceResource($type, false);
// isFresh() will explode ONLY if a parent class/trait does not exist
$resource->isFresh(0);
$parentMsg = false;
} catch (\ReflectionException $e) {
$parentMsg = $e->getMessage();
}
$message = sprintf('has type "%s" but this class %s.', $type, $parentMsg ? sprintf('is missing a parent class (%s)', $parentMsg) : 'was not found');
} else {
$alternatives = $this->createTypeAlternatives($this->container, $reference);
$message = $this->container->has($type) ? 'this service is abstract' : 'no such service exists';
$message = sprintf('references %s "%s" but %s.%s', $r->isInterface() ? 'interface' : 'class', $type, $message, $alternatives);
if ($r->isInterface() && !$alternatives) {
$message .= ' Did you create a class that implements this interface?';
}
}
$message = sprintf('Cannot autowire service "%s": %s %s', $currentId, $label, $message);
if (null !== $this->lastFailure) {
$message = $this->lastFailure."\n".$message;
$this->lastFailure = null;
}
return $message;
}
private function createTypeAlternatives(ContainerBuilder $container, TypedReference $reference): string
{
// try suggesting available aliases first
if ($message = $this->getAliasesSuggestionForType($container, $type = $reference->getType())) {
return ' '.$message;
}
if (null === $this->ambiguousServiceTypes) {
$this->populateAvailableTypes($container);
}
$servicesAndAliases = $container->getServiceIds();
if (null !== ($autowiringAliases = $this->autowiringAliases[$type] ?? null) && !isset($autowiringAliases[''])) {
return sprintf(' Available autowiring aliases for this %s are: "$%s".', class_exists($type, false) ? 'class' : 'interface', implode('", "$', $autowiringAliases));
}
if (!$container->has($type) && false !== $key = array_search(strtolower($type), array_map('strtolower', $servicesAndAliases))) {
return sprintf(' Did you mean "%s"?', $servicesAndAliases[$key]);
} elseif (isset($this->ambiguousServiceTypes[$type])) {
$message = sprintf('one of these existing services: "%s"', implode('", "', $this->ambiguousServiceTypes[$type]));
} elseif (isset($this->types[$type])) {
$message = sprintf('the existing "%s" service', $this->types[$type]);
} else {
return '';
}
return sprintf(' You should maybe alias this %s to %s.', class_exists($type, false) ? 'class' : 'interface', $message);
}
private function getAliasesSuggestionForType(ContainerBuilder $container, string $type): ?string
{
$aliases = [];
foreach (class_parents($type) + class_implements($type) as $parent) {
if ($container->has($parent) && !$container->findDefinition($parent)->isAbstract()) {
$aliases[] = $parent;
}
}
if (1 < $len = \count($aliases)) {
$message = 'Try changing the type-hint to one of its parents: ';
for ($i = 0, --$len; $i < $len; ++$i) {
$message .= sprintf('%s "%s", ', class_exists($aliases[$i], false) ? 'class' : 'interface', $aliases[$i]);
}
$message .= sprintf('or %s "%s".', class_exists($aliases[$i], false) ? 'class' : 'interface', $aliases[$i]);
return $message;
}
if ($aliases) {
return sprintf('Try changing the type-hint to "%s" instead.', $aliases[0]);
}
return null;
}
private function populateAutowiringAlias(string $id): void
{
if (!preg_match('/(?(DEFINE)(?<V>[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+))^((?&V)(?:\\\\(?&V))*+)(?: \$((?&V)))?$/', $id, $m)) {
return;
}
$type = $m[2];
$name = $m[3] ?? '';
if (class_exists($type, false) || interface_exists($type, false)) {
$this->autowiringAliases[$type][$name] = $name;
}
}
private function populateCombinedAliases(ContainerBuilder $container): void
{
$this->combinedAliases = [];
$reverseAliases = [];
foreach ($container->getAliases() as $id => $alias) {
if (!preg_match('/(?(DEFINE)(?<V>[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+))^((?&V)(?:\\\\(?&V))*+)(?: \$((?&V)))?$/', $id, $m)) {
continue;
}
$type = $m[2];
$name = $m[3] ?? '';
$reverseAliases[(string) $alias][$name][] = $type;
}
foreach ($reverseAliases as $alias => $names) {
foreach ($names as $name => $types) {
if (2 > $count = \count($types)) {
continue;
}
sort($types);
$i = 1 << $count;
// compute the powerset of the list of types
while ($i--) {
$set = [];
for ($j = 0; $j < $count; ++$j) {
if ($i & (1 << $j)) {
$set[] = $types[$j];
}
}
if (2 <= \count($set)) {
$this->combinedAliases[implode('&', $set).('' === $name ? '' : ' $'.$name)] = $alias;
$this->combinedAliases[implode('|', $set).('' === $name ? '' : ' $'.$name)] = $alias;
}
}
}
}
}
}