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<?php

namespace App\Helpers;

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use Symfony\Component\HttpFoundation\StreamedResponse;

class ExcelHelper
{
    private Spreadsheet $spreadsheet;

private int $activeSheetIndex;

public function __construct()
    {
        $this->spreadsheet = new Spreadsheet;

$this->activeSheetIndex = $this->spreadsheet->getActiveSheetIndex();

}

/**
     * @throws \PhpOffice\PhpSpreadsheet\Exception
     */
    public function addSheet(string $title, array $content): void
    {
        if ($this->activeSheetIndex > 0) {

$this->spreadsheet->createSheet();

$this->spreadsheet->setActiveSheetIndex($this->activeSheetIndex);

}

$this->spreadsheet->getActiveSheet()->setTitle($title);

$this->spreadsheet->getActiveSheet()->fromArray($content);

$this->activeSheetIndex++;
    }

/**
     * @throws \PhpOffice\PhpSpreadsheet\Exception
     */
    public function addSheets(array $data): void
    {
        foreach ($data as $name => $sheet) {

$this->addSheet($name, $sheet);
        }
    }

public function download(string $fileName): StreamedResponse
    {
        return response()->streamDownload(function () use ($fileName) {
            $fileType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
            ob_clean();
            header('Content-Description: File Transfer');
            header('Content-Type: '.$fileType);
            header('Content-disposition: attachment; filename='.$fileName.' Daten.xlsx');
            header('Content-Transfer-Encoding: binary');
            header('Expires: 0');
            header('Cache-Control: must-revalidate');
            header('Pragma: public');

$writer = new Xlsx($this->spreadsheet);

$writer->save('php://output');
        }, $fileName.'.xlsx');
    }
}

/home/forge/stage.sksb.smartcon-survey.com/app/Services/../Helpers/ExcelHelper.php