<?php

require __DIR__ . '/vendor/autoload.php';

use Dompdf\Dompdf;
use Dompdf\Options;

$router = new \Bramus\Router\Router();

$router->set404('/api(/.*)?', function () {
    header('HTTP/1.1 404 Not Found');
    header('Content-Type: application/json');

    $jsonArray = array();
    $jsonArray['status'] = "404";
    $jsonArray['status_text'] = "route not defined";

    echo json_encode($jsonArray);
});

$router->post('/api/html2pdf', function () {

    $json_data = json_decode(file_get_contents('php://input'), true);

    if (isset($json_data['html'])) {

        header($_SERVER["SERVER_PROTOCOL"] . " 200 OK");

        $html = $json_data['html'];
        $md5 = md5($html);

        $attachment = sprintf("/tmp/%s.pdf", $md5);

        if (!file_exists($attachment)) {

            $options = new Options();
            $options->setIsRemoteEnabled(true);

            $dompdf = new Dompdf($options);
            $dompdf->loadHtml($html);
            $dompdf->setPaper('A5');
            $dompdf->render();
            $output = $dompdf->output();
            file_put_contents($attachment, $output);

            header("X-Local-Cache: miss");
        } else {
            header("X-Local-Cache: hit");
        }

        header("Cache-Control: public");
        header("Content-Type: application/pdf");
        header("Content-Transfer-Encoding: Binary");
        header("Content-Length:" . filesize($attachment));
        header("Content-Disposition: attachment; filename=export.pdf");
        readfile($attachment);
    } else {
        header("HTTP/1.1 422 Unprocessable Entity");
        header("Content-Type: application/json");
        echo json_encode(array("status_text" => "missing parameters"));
    }

});

$router->run();