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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\Config\Loader;
use Symfony\Component\Config\Exception\FileLoaderImportCircularReferenceException;
use Symfony\Component\Config\Exception\FileLocatorFileNotFoundException;
use Symfony\Component\Config\Exception\LoaderLoadException;
use Symfony\Component\Config\FileLocatorInterface;
use Symfony\Component\Config\Resource\FileExistenceResource;
use Symfony\Component\Config\Resource\GlobResource;
/**
* 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 Loader
{
protected static $loading = [];
protected $locator;
private $currentDir;
public function __construct(FileLocatorInterface $locator)
{
$this->locator = $locator;
}
/**
* Sets the current directory.
*/
public function setCurrentDir(string $dir)
{
$this->currentDir = $dir;
}
/**
* Returns the file locator used by this loader.
*
* @return FileLocatorInterface
*/
public function getLocator()
{
return $this->locator;
}
/**
* Imports a resource.
*
* @param mixed $resource A Resource
* @param string|null $type The resource type or null if unknown
* @param bool $ignoreErrors Whether to ignore import errors or not
* @param string|null $sourceResource The original resource importing the new resource
*
* @return mixed
*
* @throws LoaderLoadException
* @throws FileLoaderImportCircularReferenceException
* @throws FileLocatorFileNotFoundException
*/
public function import($resource, string $type = null, bool $ignoreErrors = false, string $sourceResource = null)
{
if (\is_string($resource) && \strlen($resource) !== $i = strcspn($resource, '*?{[')) {
$ret = [];
$isSubpath = 0 !== $i && false !== strpos(substr($resource, 0, $i), '/');
foreach ($this->glob($resource, false, $_, $ignoreErrors || !$isSubpath) as $path => $info) {
if (null !== $res = $this->doImport($path, $type, $ignoreErrors, $sourceResource)) {
$ret[] = $res;
}
$isSubpath = true;
}
if ($isSubpath) {
return isset($ret[1]) ? $ret : (isset($ret[0]) ? $ret[0] : null);
}
}
return $this->doImport($resource, $type, $ignoreErrors, $sourceResource);
}
/**
* @internal
*/
protected function glob(string $pattern, bool $recursive, &$resource = null, bool $ignoreErrors = false, bool $forExclusion = false, array $excluded = [])
{
if (\strlen($pattern) === $i = strcspn($pattern, '*?{[')) {
$prefix = $pattern;
$pattern = '';
} elseif (0 === $i || false === strpos(substr($pattern, 0, $i), '/')) {
$prefix = '.';
$pattern = '/'.$pattern;
} else {
$prefix = \dirname(substr($pattern, 0, 1 + $i));
$pattern = substr($pattern, \strlen($prefix));
}
try {
$prefix = $this->locator->locate($prefix, $this->currentDir, true);
} catch (FileLocatorFileNotFoundException $e) {
if (!$ignoreErrors) {
throw $e;
}
$resource = [];
foreach ($e->getPaths() as $path) {
$resource[] = new FileExistenceResource($path);
}
return;
}
$resource = new GlobResource($prefix, $pattern, $recursive, $forExclusion, $excluded);
yield from $resource;
}
private function doImport($resource, string $type = null, bool $ignoreErrors = false, string $sourceResource = null)
{
try {
$loader = $this->resolve($resource, $type);
if ($loader instanceof self && null !== $this->currentDir) {
$resource = $loader->getLocator()->locate($resource, $this->currentDir, false);
}
$resources = \is_array($resource) ? $resource : [$resource];
for ($i = 0; $i < $resourcesCount = \count($resources); ++$i) {
if (isset(self::$loading[$resources[$i]])) {
if ($i == $resourcesCount - 1) {
throw new FileLoaderImportCircularReferenceException(array_keys(self::$loading));
}
} else {
$resource = $resources[$i];
break;
}
}
self::$loading[$resource] = true;
try {
$ret = $loader->load($resource, $type);
} finally {
unset(self::$loading[$resource]);
}
return $ret;
} catch (FileLoaderImportCircularReferenceException $e) {
throw $e;
} catch (\Exception $e) {
if (!$ignoreErrors) {
// prevent embedded imports from nesting multiple exceptions
if ($e instanceof LoaderLoadException) {
throw $e;
}
throw new LoaderLoadException($resource, $sourceResource, null, $e, $type);
}
}
}
}
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