imageOnly<E> static method

Rule<FileInfo, E> imageOnly<E>({ required E error, })

Validates that the file is an image.

Checks for common image extensions and MIME types.

FileRules.imageOnly(error: 'Only images allowed')

Implementation

static Rule<FileInfo, E> imageOnly<E>({required E error}) {
  const imageExtensions = ['jpg', 'jpeg', 'png', 'gif', 'webp', 'bmp', 'svg'];
  return PredicateRule(
    predicate: (value) {
      if (value.mimeType != null) {
        return value.mimeType!.startsWith('image/');
      }
      return imageExtensions.contains(value.extension);
    },
    error: error,
  );
}