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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\Translation\Extractor;
use Symfony\Component\Translation\Exception\InvalidArgumentException;
/**
* Base class used by classes that extract translation messages from files.
*
* @author Marcos D. Sánchez <marcosdsanchez@gmail.com>
*/
abstract class AbstractFileExtractor
{
/**
* @param string|iterable $resource Files, a file or a directory
*
* @return iterable
*/
protected function extractFiles($resource)
{
if (is_iterable($resource)) {
$files = [];
foreach ($resource as $file) {
if ($this->canBeExtracted($file)) {
$files[] = $this->toSplFileInfo($file);
}
}
} elseif (is_file($resource)) {
$files = $this->canBeExtracted($resource) ? [$this->toSplFileInfo($resource)] : [];
} else {
$files = $this->extractFromDirectory($resource);
}
return $files;
}
private function toSplFileInfo(string $file): \SplFileInfo
{
return new \SplFileInfo($file);
}
/**
* @return bool
*
* @throws InvalidArgumentException
*/
protected function isFile(string $file)
{
if (!is_file($file)) {
throw new InvalidArgumentException(sprintf('The "%s" file does not exist.', $file));
}
return true;
}
/**
* @return bool
*/
abstract protected function canBeExtracted(string $file);
/**
* @param string|array $resource Files, a file or a directory
*
* @return iterable files to be extracted
*/
abstract protected function extractFromDirectory($resource);
}