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