function ImageItem::generateSampleValue

Overrides FileItem::generateSampleValue

File

core/modules/image/src/Plugin/Field/FieldType/ImageItem.php, line 336

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, $extensions));
    // Generate a max of 5 different images.
    if (!isset($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 $e) {
            // Ignore failed move.
        }
        if ($path = $random->image($file_system->realpath($destination), $min_resolution, $max_resolution)) {
            $image = File::create();
            $image->setFileUri($path);
            $image->setOwnerId(\Drupal::currentUser()->id());
            $image->setMimeType(\Drupal::service('file.mime_type.guesser')->guess($path));
            $image->setFileName($file_system->basename($path));
            $destination_dir = static::doGetUploadLocation($settings);
            $file_system->prepareDirectory($destination_dir, FileSystemInterface::CREATE_DIRECTORY);
            $destination = $destination_dir . '/' . basename($path);
            $file = file_move($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][$image_index];
    }
    list($width, $height) = getimagesize($file->getFileUri());
    $values = [
        'target_id' => $file->id(),
        'alt' => $random->sentences(4),
        'title' => $random->sentences(4),
        'width' => $width,
        'height' => $height,
    ];
    return $values;
}