javadev / pt-backend

@Service

class ReportPhotoFileService {

    private static final String BASE64_PREFIX = ";base64,";

    private static final int BASE64_PREFIX_LENGTH = 8;

    private final InUserPhotoRepository inUserPhotoRepository;

    private final UserService userService;

    ReportPhotoFileService(InUserPhotoRepository inUserPhotoRepository, UserService userService) {

        this.inUserPhotoRepository = inUserPhotoRepository;

        this.userService = userService;

    }

            throws IOException {

        if (!token.isEmpty()) {

            userService.checkUserToken(token);

            final InUserPhoto inUserPhoto = inUserPhotoRepository.findById(id).orElse(null);

            if (inUserPhoto == null) {

                throw new ResourceNotFoundException("File with id " + id + " not found");

            }

            dataUrlToOutputStream(inUserPhoto.getData_url(), outputStream);

            return new ReportPhotoFileDTO()

                    .setId(inUserPhoto.getId())

                    .setFileName(inUserPhoto.getFile_name())

                    .setFileType(inUserPhoto.getFile_type());

        }

        return new ReportPhotoFileDTO();

    }

    void dataUrlToOutputStream(String dataUrl, OutputStream outputStream) throws IOException {

        final String encodedString =

                dataUrl.substring(dataUrl.indexOf(BASE64_PREFIX) + BASE64_PREFIX_LENGTH);

        outputStream.write(Base64.getDecoder().decode(encodedString));