function CertificateController::certificateDownload in Certificate 4.x

Stream a PDF to the browser.

Parameters

$entity:

AccountInterface $user:

CertificateTemplate $certificate_template:

boolean $preview Send to browser instead:

Return value

binary

1 call to CertificateController::certificateDownload()

CertificateController::certificatePage in src/Controller/CertificateController.php

Full tab

File

src/Controller/CertificateController.php, line 191

Class

CertificateController

Namespace

Drupal\certificate\Controller

Code

function certificateDownload(EntityInterface $entity = NULL, AccountInterface $user, CertificateTemplate $certificate_template, $preview = FALSE) {
  if (!($entity = $this
    ->getEntityFromRoute())) {
    return AccessResult::neutral();
  }
  $snapshots_enabled = (bool) Drupal::config('certificate.settings')
    ->get('snapshots');
  $snapshot_params = [
    'entity_id' => $entity
      ->id(),
    'entity_type' => $entity
      ->bundle(),
    'uid' => $user
      ->id(),
  ];
  if ($snapshots_enabled) {
    $snapshot_search = Drupal::entityTypeManager()
      ->getStorage('certificate_snapshot')
      ->loadByProperties($snapshot_params);
    $html = !empty($snapshot_search) ? current($snapshot_search)
      ->get('snapshot')->value : NULL;
  }

  // If no snapshot HTML found, load the entity
  if (empty($html)) {
    $renderView = $certificate_template
      ->renderView($user, $entity);
    $html = render($renderView);
  }

  // Add base HREF so images work.
  $base = \Drupal::request()
    ->getSchemeAndHttpHost();
  $html = "<base href=\"{$base}\">" . $html;

  // Save a new snapshot if none exists
  if ($snapshots_enabled && empty($snapshot_search)) {
    $snapshot_params['snapshot'] = $html;
    CertificateSnapshot::create($snapshot_params)
      ->save();
  }
  if (\Drupal::currentUser()
    ->hasPermission('administer certificate') && isset($_GET['preview'])) {
    print $html;
    exit;
  }

  // Get the PDF engine.
  $pdf_gen = $certificate_template
    ->loadPrintableEngine([
    'orientation' => $certificate_template
      ->get('orientation')
      ->getString(),
  ]);

  // Check for a PDF engine
  if ($pdf_gen === FALSE) {
    $current_user = Drupal::currentUser();
    $msg = t('Current site configuration does not allow PDF file creation. Please contact an administrator.');
    if ($current_user
      ->hasPermission('administer entity print')) {
      $link = Link::createFromRoute('configure a PDF library', 'entity_print.settings');
      $msg = t('Please @link to print certificates. Error: @error', [
        '@link' => $link
          ->toString(),
        '@error' => $pdf_gen ? $pdf_gen
          ->getStderr() : '',
      ]);
    }
    return [
      '#markup' => $msg,
    ];
  }

  // Engine is configured, proceed!
  // Add the page
  $pdf_gen
    ->addPage($html);

  // Create that pdf and send it!
  $pdf_gen
    ->send($entity
    ->label(), TRUE);
}