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FileServiceDefaultImpl.java
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FileServiceDefaultImpl.java
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package com.sirnoob97.storageservice.file.service;
import java.io.IOException;
import java.util.Set;
import javax.transaction.Transactional;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.server.ResponseStatusException;
import com.sirnoob97.storageservice.file.dto.FileDto;
import com.sirnoob97.storageservice.file.dto.FileInfoDto;
import com.sirnoob97.storageservice.file.entity.File;
import com.sirnoob97.storageservice.file.entity.FileData;
import com.sirnoob97.storageservice.file.entity.FileDataRepository;
import com.sirnoob97.storageservice.file.entity.FileRepository;
import lombok.RequiredArgsConstructor;
@RequiredArgsConstructor
@Transactional
@Service
public class FileServiceDefaultImpl implements FileService {
private static final ResponseStatusException FILE_NOT_FOUND_EXCEPTION = new ResponseStatusException(HttpStatus.NOT_FOUND, "File not found");
private final FileRepository fileRepository;
private final FileDataRepository fileDataRepository;
@Override
public FileInfoDto persistNewFile(MultipartFile mpf, String downloadURL) throws IOException {
var fileData = extractFileData(mpf);
var persistedData = fileDataRepository.save(fileData);
var file = buildFile(mpf, persistedData);
var persistedFile = fileRepository.save(file);
return builFileInfoDto(downloadURL, persistedFile);
}
@Override
public FileDto getFileDto(long id) {
return fileRepository.findFileDtoById(id).orElseThrow(
() -> FILE_NOT_FOUND_EXCEPTION);
}
@Override
public Set<FileInfoDto> listFiles(int limit, int offset) {
return fileRepository.listFileInfoDtos(limit, offset);
}
@Override
public void deleteFile(long id) {
int ret = fileDataRepository.deleteFileDataById(id);
if (ret == 0) {
throw FILE_NOT_FOUND_EXCEPTION;
}
}
private FileInfoDto builFileInfoDto(String downloadURL, File file) {
return FileInfoDto.builder()
.id(file.getId())
.fileName(file.getFileName())
.fileSize(file.getFileSize())
.mimeType(file.getMimeType())
.downloadUrl(downloadURL + file.getId())
.build();
}
private File buildFile(MultipartFile mpf, FileData data) {
var fileName = StringUtils.cleanPath(mpf.getOriginalFilename());
return File.builder()
.fileName(fileName)
.mimeType(mpf.getContentType())
.fileSize(mpf.getSize())
.data(data)
.build();
}
private FileData extractFileData(MultipartFile mpf) throws IOException {
return FileData.builder().fileData(mpf.getBytes()).build();
}
}