function ImageItem::generateSampleValue

Overrides FileItem::generateSampleValue

File

core/modules/image/src/Plugin/Field/FieldType/ImageItem.php, line 351

Class

ImageItem

Plugin implementation of the 'image' field type.

Namespace

Code

public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
  $random = new Random();
  $settings = $field_definition->getSettings();
  static $images = [];
  $min_resolution = empty($settings['min_resolution']) ? '100x100' : $settings['min_resolution'];
  $max_resolution = empty($settings['max_resolution']) ? '600x600' : $settings['max_resolution'];
  $extensions = array_intersect(explode(' ', $settings['file_extensions']), [
    'png',
    'gif',
    'jpg',
    'jpeg',
  ]);
  $extension = array_rand(array_combine($extensions, $extensions));
  $min = explode('x', $min_resolution);
  $max = explode('x', $max_resolution);
  if (intval($min[0]) > intval($max[0])) {
    $max[0] = $min[0];
  }
  if (intval($min[1]) > intval($max[1])) {
    $max[1] = $min[1];
  }
  $max_resolution = "{$max[0]}x{$max[1]}";
  // Generate a max of 5 different images.
  if (!isset($images[$extension][$min_resolution][$max_resolution]) || count($images[$extension][$min_resolution][$max_resolution]) <= 5) {
    /** @var \Drupal\Core\File\FileSystemInterface $file_system */
    $file_system = \Drupal::service('file_system');
    $tmp_file = $file_system->tempnam('temporary://', 'generateImage_');
    $destination = $tmp_file . '.' . $extension;
    try {
      $file_system->move($tmp_file, $destination);
    } catch (FileException) {
      // Ignore failed move.
    }
    if ($path = $random->image($file_system->realpath($destination), $min_resolution, $max_resolution)) {
      $image = File::create();
      $image->setFileUri($path);
      $image->setOwnerId(\Drupal::currentUser()->id());
      $guesser = \Drupal::service('file.mime_type.guesser');
      $image->setMimeType($guesser->guessMimeType($path));
      $image->setFileName($file_system->basename($path));
      $destination_dir = static::doGetUploadLocation($settings);
      $file_system->prepareDirectory($destination_dir, FileSystemInterface::CREATE_DIRECTORY);
      // Ensure directory ends with a slash.
      $destination_dir .= str_ends_with($destination_dir, '/') ? '' : '/';
      $destination = $destination_dir . basename($path);
      $file = \Drupal::service('file.repository')->move($image, $destination);
      $images[$extension][$min_resolution][$max_resolution][$file->id()] = $file;
    }
    else {
      return [];
    }
  }
  else {
    // Select one of the images we've already generated for this field.
    $image_index = array_rand($images[$extension][$min_resolution][$max_resolution]);
    $file = $images[$extension][$min_resolution][$max_resolution][$image_index];
  }
  [
    $width,
    $height,
  ] = getimagesize($file->getFileUri());
  $values = [
    'target_id' => $file->id(),
    'alt' => $random->sentences(4),
    'title' => $random->sentences(4),
    'width' => $width,
    'height' => $height,
  ];
  return $values;
}