ExifFactory.php

<?php

namespace Drupal\exif;

include_once drupal_get_path('module', 'exif') . '/ExifPHPExtension.php';
include_once drupal_get_path('module', 'exif') . '/SimpleExiftoolFacade.php';

/**
 *
 */
class ExifFactory {
    
    /**
     *
     */
    public static function getExtractionSolutions() {
        return array(
            "simple_exiftool" => "exiftool",
            "php_extensions" => "php extensions",
        );
    }
    
    /**
     *
     */
    public static function getExifInterface() {
        $extractionSolution = variable_get('exif_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();
        }
    }

}