src/Service/BarcodeGenerator.php line 33

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  1. <?php
  3. namespace FMS\eLibreria\CmsBundle\Service;
  5. use Com\Tecnick\Barcode\Barcode;
  7. class BarcodeGenerator {
  9. const CODE_TYPE = "C128";
  10. const FOREGROUND_COLOR = "black";
  11. const BACKGROUND_COLOR = "white";
  12. const PREFIX_BASE64 = "data:image/png;base64, ";
  14. /**
  15. * A QR Code with error correction level M, which the Orden asks the invoice QR for (art. 21.1). The library
  16. * silently turns any level it does not know into L, so `BarcodeGeneratorQrTest` reads the level back from the
  17. * symbol instead of trusting this string (change verifactu-11, design decision 3).
  18. */
  19. const QR_CODE_TYPE = "QRCODE,M";
  21. /**
  22. * Pixels per module of the QR image: enough for 300 dpi at the 35 mm of the A4 block for every URL an invoice
  23. * prints. The printed size is set in millimetres by the print stylesheets, never by these pixels.
  24. */
  25. const QR_MODULE_UNITS = 12;
  27. /** The PNG carries no quiet zone of its own: the stylesheets give it in millimetres. */
  28. const QR_PADDING = array(0, 0, 0, 0);
  30. /** @var Barcode */
  31. private $barcode;
  33. public function __construct() {
  34. $this->barcode = new Barcode();
  35. }
  37. public function getC128Binary($code, $width = -1, $height = -30){
  38. // generate a barcode
  39. $bobj = $this->barcode->getBarcodeObj(
  40. self::CODE_TYPE, // barcode type and additional comma-separated parameters
  41. $code, // data string to encode
  42. $width, // bar width (use absolute or negative value as multiplication factor)
  43. $height, // bar height (use absolute or negative value as multiplication factor)
  44. self::FOREGROUND_COLOR, // foreground color
  45. array(0,0,0,0) // padding (use absolute or negative values as multiplication factors)
  46. )->setBackgroundColor(self::BACKGROUND_COLOR); // background color
  48. return $bobj->getPngData();
  49. }
  51. public function getC128Base64($code, $width = -1, $height = -30){
  52. return base64_encode($this->getC128Binary($code, $width, $height));
  53. }
  56. public function getC128Base64ForImageTag($code, $width = -1, $height = -30){
  57. return self::PREFIX_BASE64 . $this->getC128Base64($code, $width, $height);
  58. }
  60. /**
  61. * The PNG of the QR of a verification URL, base64-encoded (change verifactu-11, design decision 3). A
  62. * negative size is the size of each module, so every module is the same whole number of pixels.
  63. */
  64. public function getQrPngBase64(string $url): string {
  65. $qr = $this->barcode->getBarcodeObj(
  66. self::QR_CODE_TYPE,
  67. $url,
  68. -self::QR_MODULE_UNITS,
  69. -self::QR_MODULE_UNITS,
  70. self::FOREGROUND_COLOR,
  71. self::QR_PADDING
  72. )->setBackgroundColor(self::BACKGROUND_COLOR);
  74. return base64_encode($qr->getPngData());
  75. }
  76. }