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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\Loader;
use Symfony\Component\Config\FileLocatorInterface;
use Symfony\Component\Config\Loader\FileLoader as BaseFileLoader;
use Symfony\Component\Config\Resource\GlobResource;
use Symfony\Component\DependencyInjection\ChildDefinition;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
/**
* FileLoader is the abstract class used by all built-in loaders that are file based.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
abstract class FileLoader extends BaseFileLoader
{
protected $container;
protected $isLoadingInstanceof = false;
protected $instanceof = [];
public function __construct(ContainerBuilder $container, FileLocatorInterface $locator)
{
$this->container = $container;
parent::__construct($locator);
}
/**
* Registers a set of classes as services using PSR-4 for discovery.
*
* @param Definition $prototype A definition to use as template
* @param string $namespace The namespace prefix of classes in the scanned directory
* @param string $resource The directory to look for classes, glob-patterns allowed
* @param string|string[]|null $exclude A globbed path of files to exclude or an array of globbed paths of files to exclude
*/
public function registerClasses(Definition $prototype, $namespace, $resource, $exclude = null)
{
if ('\\' !== substr($namespace, -1)) {
throw new InvalidArgumentException(sprintf('Namespace prefix must end with a "\\": %s.', $namespace));
}
if (!preg_match('/^(?:[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+\\\\)++$/', $namespace)) {
throw new InvalidArgumentException(sprintf('Namespace is not a valid PSR-4 prefix: %s.', $namespace));
}
$classes = $this->findClasses($namespace, $resource, (array) $exclude);
// prepare for deep cloning
$serializedPrototype = serialize($prototype);
$interfaces = [];
$singlyImplemented = [];
foreach ($classes as $class => $errorMessage) {
if (interface_exists($class, false)) {
$interfaces[] = $class;
} else {
$this->setDefinition($class, $definition = unserialize($serializedPrototype));
if (null !== $errorMessage) {
$definition->addError($errorMessage);
continue;
}
foreach (class_implements($class, false) as $interface) {
$singlyImplemented[$interface] = isset($singlyImplemented[$interface]) ? false : $class;
}
}
}
foreach ($interfaces as $interface) {
if (!empty($singlyImplemented[$interface])) {
$this->container->setAlias($interface, $singlyImplemented[$interface])
->setPublic(false);
}
}
}
/**
* Registers a definition in the container with its instanceof-conditionals.
*
* @param string $id
* @param Definition $definition
*/
protected function setDefinition($id, Definition $definition)
{
$this->container->removeBindings($id);
if ($this->isLoadingInstanceof) {
if (!$definition instanceof ChildDefinition) {
throw new InvalidArgumentException(sprintf('Invalid type definition "%s": ChildDefinition expected, "%s" given.', $id, \get_class($definition)));
}
$this->instanceof[$id] = $definition;
} else {
$this->container->setDefinition($id, $definition instanceof ChildDefinition ? $definition : $definition->setInstanceofConditionals($this->instanceof));
}
}
private function findClasses($namespace, $pattern, array $excludePatterns)
{
$parameterBag = $this->container->getParameterBag();
$excludePaths = [];
$excludePrefix = null;
$excludePatterns = $parameterBag->unescapeValue($parameterBag->resolveValue($excludePatterns));
foreach ($excludePatterns as $excludePattern) {
foreach ($this->glob($excludePattern, true, $resource, false, true) as $path => $info) {
if (null === $excludePrefix) {
$excludePrefix = $resource->getPrefix();
}
// normalize Windows slashes
$excludePaths[str_replace('\\', '/', $path)] = true;
}
}
$pattern = $parameterBag->unescapeValue($parameterBag->resolveValue($pattern));
$classes = [];
$extRegexp = '/\\.php$/';
$prefixLen = null;
foreach ($this->glob($pattern, true, $resource, false, false, $excludePaths) as $path => $info) {
if (null === $prefixLen) {
$prefixLen = \strlen($resource->getPrefix());
if ($excludePrefix && 0 !== strpos($excludePrefix, $resource->getPrefix())) {
throw new InvalidArgumentException(sprintf('Invalid "exclude" pattern when importing classes for "%s": make sure your "exclude" pattern (%s) is a subset of the "resource" pattern (%s)', $namespace, $excludePattern, $pattern));
}
}
if (isset($excludePaths[str_replace('\\', '/', $path)])) {
continue;
}
if (!preg_match($extRegexp, $path, $m) || !$info->isReadable()) {
continue;
}
$class = $namespace.ltrim(str_replace('/', '\\', substr($path, $prefixLen, -\strlen($m[0]))), '\\');
if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\\\\[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+$/', $class)) {
continue;
}
try {
$r = $this->container->getReflectionClass($class);
} catch (\ReflectionException $e) {
$classes[$class] = sprintf(
'While discovering services from namespace "%s", an error was thrown when processing the class "%s": "%s".',
$namespace,
$class,
$e->getMessage()
);
continue;
}
// check to make sure the expected class exists
if (!$r) {
throw new InvalidArgumentException(sprintf('Expected to find class "%s" in file "%s" while importing services from resource "%s", but it was not found! Check the namespace prefix used with the resource.', $class, $path, $pattern));
}
if ($r->isInstantiable() || $r->isInterface()) {
$classes[$class] = null;
}
}
// track only for new & removed files
if ($resource instanceof GlobResource) {
$this->container->addResource($resource);
} else {
foreach ($resource as $path) {
$this->container->fileExists($path, false);
}
}
return $classes;
}
}
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