TextExtractorRegistry.php

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<?php
namespace ‪TYPO3\CMS\Core\Resource\TextExtraction;
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
use ‪TYPO3\CMS\Core\Resource\FileInterface;
use ‪TYPO3\CMS\Core\SingletonInterface;
use ‪TYPO3\CMS\Core\Utility\GeneralUtility;
 
class ‪TextExtractorRegistry implements ‪SingletonInterface
{
    protected ‪$textExtractorClasses = [];
 
    protected ‪$instances = [];
 
    public static function ‪getInstance()
    {
        return GeneralUtility::makeInstance(__CLASS__);
    }
 
    public function ‪registerTextExtractor($className)
    {
        if (!class_exists($className)) {
            throw new \InvalidArgumentException('The class "' . $className . '" you are trying to register is not available', 1422906893);
        }
 
        if (!in_array(TextExtractorInterface::class, class_implements($className), true)) {
            throw new \InvalidArgumentException($className . ' must implement interface' . TextExtractorInterface::class, 1422771427);
        }
 
        $this->textExtractorClasses[] = $className;
    }
 
    public function ‪getTextExtractorInstances()
    {
        if (empty($this->instances) && !empty($this->textExtractorClasses)) {
            foreach ($this->textExtractorClasses as $className) {
                $object = $this->‪createTextExtractorInstance($className);
                $this->instances[] = $object;
            }
        }
 
        return ‪$this->instances;
    }
 
    protected function ‪createTextExtractorInstance($className)
    {
        return GeneralUtility::makeInstance($className);
    }
 
    public function ‪getTextExtractor(‪FileInterface $file)
    {
        foreach ($this->‪getTextExtractorInstances() as $textExtractor) {
            if ($textExtractor->canExtractText($file)) {
                return $textExtractor;
            }
        }
 
        return null;
    }
}