ExifFactory.php

<?php

namespace Drupal\exif;

use Drupal;

/**
 * Class ExifFactory allow to get right implementation.
 *
 * @package Drupal\exif
 */
class ExifFactory {
    
    /**
     * Return description of exif parser implementations.
     *
     * @return array
     *   list names of parser implementations
     */
    public static function getExtractionSolutions() {
        return [
            "simple_exiftool" => "exiftool",
            "php_extensions" => "php extensions",
        ];
    }
    
    /**
     * Return configured exif parser.
     *
     * @return \Drupal\exif\ExifInterface
     *   configured exif parser
     */
    public static function getExifInterface() {
        $config = Drupal::configFactory()->get('exif.settings');
        $extractionSolution = $config->get('extraction_solution');
        $useExifToolSimple = $extractionSolution == "simple_exiftool";
        if (isset($useExifToolSimple) && $useExifToolSimple && SimpleExifToolFacade::checkConfiguration()) {
            return SimpleExifToolFacade::getInstance();
        }
        else {
            // Default case for now (same behavior as previous versions)
            return ExifPHPExtension::getInstance();
        }
    }

}