<?php

use App\Kernel;
use jucksearm\barcode\Datamatrix;

Kernel::app()->get('/{code}', function ($request, $response, $args) {
  $s = intval($request->getQueryParams()['s'] ?? 300);
  $s = is_int($s) ? $s : 300;
  $s = $s <= env('MinPixSize', 60) ?
    env('MinPixSize', 60) : ($s >= env('MaxPixSize', 2000) ? env('MaxPixSize', 2000) : $s);
  $m = round(20 * 2 / 300);
  $m = $m <= 5 ? 5 : ($m >= 300 ? 300 : $m);
  $image = @Datamatrix::factory()
    ->setSize($s)
    ->setMargin($m)
    ->setCode($args['code'])->getDatamatrixPngData();
  $body = $response->getBody();
  $body->write($image);
  $response = $response->withHeader("Content-type", 'image/png');
  $response = $response->withHeader("Cache-Control", 'no-cache');
  $response = $response->withHeader("Last-Modified", gmdate('D, d M Y H:i:s') . ' GMT');
  return $response;
});