<?php
require 'vendor/autoload.php';

use Endroid\QrCode\QrCode;
use Endroid\QrCode\Writer\PngWriter;

use Endroid\QrCode\Color\Color;
use Endroid\QrCode\Encoding\Encoding;
use Endroid\QrCode\ErrorCorrectionLevel;
use Endroid\QrCode\Label\Label;
use Endroid\QrCode\Logo\Logo;
use Endroid\QrCode\RoundBlockSizeMode;
use Endroid\QrCode\Writer\ValidationException;

session_start();

if (isset($_SESSION['id_token'])) {
    $url = $_SESSION['url'];
} elseif (isset($_GET['url'])) {
    $url = $_GET['url'];
} else {
    header('Location: index.php');
    exit();
}

// create QR-Code
//$qrCode = new QrCode($url);
$qrCode = new QrCode(
    data: $url,
//    encoding: new Encoding('UTF-8'),
//    errorCorrectionLevel: ErrorCorrectionLevel::Low,
//    size: 300,
    margin: 0,
    roundBlockSizeMode: RoundBlockSizeMode::Enlarge,
//    foregroundColor: new Color(0, 0, 0),
//    backgroundColor: new Color(255, 255, 255)
);
//$qrCode->setSize(300); // Größe des QR-Codes
//$qrCode->setMargin(0); // Rand um den QR-Code

// generate QR-Code as png
$writer = new PngWriter();
$result = $writer->write($qrCode);

// set header
header('Content-Type: '.$result->getMimeType());
header('Content-Disposition: inline; filename="qrcode.png"');

// output QR-Code
echo $result->getString();
?>