public function LinkToFileConstraint::validate in File Link 8

Same name and namespace in other branches

1. 2.0.x src/Plugin/Validation/Constraint/LinkToFileConstraint.php \Drupal\file_link\Plugin\Validation\Constraint\LinkToFileConstraint::validate()

File

src/Plugin/Validation/Constraint/LinkToFileConstraint.php, line 50

Class

LinkToFileConstraint

Validation constraint for file_link, checking that URI points to a file.

Namespace

Drupal\file_link\Plugin\Validation\Constraint

Code

public function validate($link, Constraint $constraint) {

  /** @var \Drupal\file_link\Plugin\Field\FieldType\FileLinkItem $link */
  if ($link
    ->isEmpty()) {
    return;
  }
  $is_valid = TRUE;
  $uri = $link
    ->get('uri')
    ->getValue();

  // Try to resolve the given URI to a URL. It may fail if it's schemeless.
  try {
    $url = Url::fromUri($uri, [
      'absolute' => TRUE,
    ])
      ->toString();
  } catch (\InvalidArgumentException $e) {
    $this->context
      ->addViolation("The following error occurred while getting the link URL: @error", [
      '@error' => $e
        ->getMessage(),
    ]);
    $is_valid = FALSE;
  }
  if ($is_valid) {

    // If URL has no path but it still needs an extension then it's not valid.
    if (!$this
      ->hasPath($url) && $this
      ->needsExtension($link)) {
      $this->context
        ->addViolation("Provided file URL has no path nor extension: @uri", [
        '@uri' => $uri,
      ]);
      $is_valid = FALSE;
    }
    if ($is_valid) {

      // Check for redirect response and get effective URL if any.
      $url = $this
        ->getEffectiveUrl($url);
      if ($this
        ->needsExtension($link) && !$this
        ->hasExtension($url)) {
        $this->context
          ->addViolation("Provided file URL has no extension: @uri", [
          '@uri' => $uri,
        ]);
        $is_valid = FALSE;
      }
      if ($is_valid && $this
        ->hasExtension($url)) {
        $is_valid = $this
          ->hasValidExtension($url, $link);
      }
    }
  }

  // If not valid construct error message.
  if (!$is_valid) {
    $this->context
      ->addViolation("Provided file URL has no valid extension: @uri", [
      '@uri' => $uri,
    ]);
  }
}