function svg_image_field_validate_mime_type in SVG Image Field 2.0.x

Same name and namespace in other branches

1. 8 svg_image_field.module \svg_image_field_validate_mime_type()
2. 2.1.x svg_image_field.module \svg_image_field_validate_mime_type()

Checks that the file has valid mime type.

Parameters

\Drupal\file\FileInterface $file: A file entity.

Return value

array An empty array if the mime_type is allowed or an array containing an error message if it's not.

See also

hook_file_validate()

1 call to svg_image_field_validate_mime_type()

FileValidationTest::testFileValidation in tests/src/Unit/FileValidationTest.php

Checks that the list of files is being checked as expected.

File

./svg_image_field.module, line 101

Contains svg_image_field.module.

Code

function svg_image_field_validate_mime_type(FileInterface $file) {
  $errors = [];
  $file_system = \Drupal::service('file_system');
  $file_path = $file_system
    ->realpath($file
    ->getFileUri());
  $mime_type = $file
    ->getMimeType();
  $allowed_mime_types = [
    'image/svg+xml',
    'image/svg',
  ];
  if (in_array($mime_type, $allowed_mime_types) === FALSE) {
    $errors[] = t('Only files with mime type %mime-types-allowed are allowed. Mime type detected %mime-type-detected', [
      '%mime-types-allowed' => implode(',', $allowed_mime_types),
      '%mime-type-detected' => $mime_type,
    ]);
  }
  else {
    $xml = new DOMDocument();
    if (@$xml
      ->load($file_path) === FALSE || $xml
      ->getElementsByTagName('svg')->length === 0) {
      $errors[] = t('File %file-name is not valid svg', [
        '%file-name' => $file
          ->getFilename(),
      ]);
    }
  }
  return $errors;
}