검증게시판 기능 추가
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package com.goldenchart.service;
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import com.goldenchart.dto.VerificationIssueImageDto;
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import com.goldenchart.entity.GcVerificationIssueImage;
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import com.goldenchart.repository.GcVerificationIssueImageRepository;
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import com.goldenchart.repository.GcVerificationIssueRepository;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.core.io.Resource;
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import org.springframework.core.io.UrlResource;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import org.springframework.web.multipart.MultipartFile;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.List;
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import java.util.Optional;
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import java.util.Set;
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import java.util.UUID;
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@Service
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@Slf4j
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public class VerificationIssueImageService {
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private static final Set<String> ALLOWED_TYPES = Set.of(
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"image/jpeg", "image/png", "image/gif", "image/webp", "image/bmp"
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);
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private final GcVerificationIssueImageRepository imageRepository;
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private final GcVerificationIssueRepository issueRepository;
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private final Path uploadRoot;
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private final long maxFileSizeBytes;
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private final int maxImagesPerIssue;
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public VerificationIssueImageService(
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GcVerificationIssueImageRepository imageRepository,
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GcVerificationIssueRepository issueRepository,
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@Value("${goldenchart.verification.upload-dir:data/verification-images}") String uploadDir,
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@Value("${goldenchart.verification.max-image-size-mb:5}") int maxImageSizeMb,
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@Value("${goldenchart.verification.max-images-per-issue:30}") int maxImagesPerIssue) throws IOException {
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this.imageRepository = imageRepository;
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this.issueRepository = issueRepository;
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this.uploadRoot = Paths.get(uploadDir).toAbsolutePath().normalize();
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this.maxFileSizeBytes = maxImageSizeMb * 1024L * 1024L;
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this.maxImagesPerIssue = maxImagesPerIssue;
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Files.createDirectories(this.uploadRoot);
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}
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public List<VerificationIssueImageDto> listByIssue(Long issueId) {
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return imageRepository.findByIssueIdOrderBySortOrderAscCreatedAtAsc(issueId).stream()
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.map(this::toDto)
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.toList();
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}
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@Transactional
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public List<VerificationIssueImageDto> upload(Long issueId, List<MultipartFile> files) throws IOException {
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if (!issueRepository.existsById(issueId)) {
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throw new IllegalArgumentException("issue not found: " + issueId);
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}
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if (files == null || files.isEmpty()) {
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throw new IllegalArgumentException("no files");
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}
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long current = imageRepository.findByIssueIdOrderBySortOrderAscCreatedAtAsc(issueId).size();
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if (current + files.size() > maxImagesPerIssue) {
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throw new IllegalArgumentException("max images exceeded: " + maxImagesPerIssue);
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}
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Path issueDir = uploadRoot.resolve("issue_" + issueId);
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Files.createDirectories(issueDir);
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int sort = (int) current;
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List<VerificationIssueImageDto> saved = new java.util.ArrayList<>();
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for (MultipartFile file : files) {
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if (file == null || file.isEmpty()) continue;
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byte[] data = file.getBytes();
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String contentType = resolveContentType(file, data);
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validateFile(data.length, contentType);
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String original = sanitizeFileName(file.getOriginalFilename());
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String storedName = UUID.randomUUID() + "_" + original;
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Path target = issueDir.resolve(storedName);
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Files.write(target, data);
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String relative = uploadRoot.relativize(target).toString().replace('\\', '/');
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GcVerificationIssueImage entity = GcVerificationIssueImage.builder()
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.issueId(issueId)
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.fileName(original)
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.contentType(contentType)
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.storagePath(relative)
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.fileSize((long) data.length)
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.sortOrder(sort++)
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.build();
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saved.add(toDto(imageRepository.save(entity)));
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}
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if (saved.isEmpty()) {
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throw new IllegalArgumentException("no valid image files");
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}
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return saved;
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}
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public Optional<Resource> loadFile(Long issueId, Long imageId) {
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return imageRepository.findById(imageId)
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.filter(img -> issueId.equals(img.getIssueId()))
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.map(img -> {
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try {
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Path path = uploadRoot.resolve(img.getStoragePath()).normalize();
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if (!path.startsWith(uploadRoot) || !Files.exists(path)) {
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return null;
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}
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Resource resource = new UrlResource(path.toUri());
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return resource.exists() && resource.isReadable() ? resource : null;
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} catch (Exception e) {
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log.warn("image load failed id={}: {}", imageId, e.getMessage());
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return null;
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}
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});
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}
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public Optional<String> contentType(Long issueId, Long imageId) {
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return imageRepository.findById(imageId)
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.filter(img -> issueId.equals(img.getIssueId()))
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.map(GcVerificationIssueImage::getContentType);
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}
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@Transactional
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public boolean delete(Long issueId, Long imageId) throws IOException {
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Optional<GcVerificationIssueImage> opt = imageRepository.findById(imageId)
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.filter(img -> issueId.equals(img.getIssueId()));
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if (opt.isEmpty()) return false;
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GcVerificationIssueImage img = opt.get();
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deletePhysicalFile(img.getStoragePath());
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imageRepository.delete(img);
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return true;
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}
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@Transactional
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public void deleteAllForIssue(Long issueId) throws IOException {
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List<GcVerificationIssueImage> images =
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imageRepository.findByIssueIdOrderBySortOrderAscCreatedAtAsc(issueId);
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for (GcVerificationIssueImage img : images) {
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deletePhysicalFile(img.getStoragePath());
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}
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imageRepository.deleteByIssueId(issueId);
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Path issueDir = uploadRoot.resolve("issue_" + issueId);
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if (Files.isDirectory(issueDir)) {
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try { Files.deleteIfExists(issueDir); } catch (IOException ignored) { /* ok */ }
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}
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}
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private void validateFile(long sizeBytes, String contentType) {
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if (contentType == null) {
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throw new IllegalArgumentException("unsupported image type");
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}
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if (sizeBytes > maxFileSizeBytes) {
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throw new IllegalArgumentException("file too large");
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}
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}
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private String resolveContentType(MultipartFile file, byte[] data) {
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String type = file.getContentType();
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if (type != null && !type.isBlank()) {
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type = type.split(";")[0].trim().toLowerCase();
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if ("image/jpg".equals(type) || "image/pjpeg".equals(type)) {
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return "image/jpeg";
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}
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if ("image/x-png".equals(type)) {
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return "image/png";
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}
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if (ALLOWED_TYPES.contains(type)) {
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return type;
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}
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// application/octet-stream 등 — 매직 바이트로 판별
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if ("application/octet-stream".equals(type) || type.startsWith("image/")) {
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String sniffed = sniffImageType(data);
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if (sniffed != null) return sniffed;
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}
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}
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String name = file.getOriginalFilename();
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if (name != null) {
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String lower = name.toLowerCase();
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if (lower.endsWith(".jpg") || lower.endsWith(".jpeg")) return "image/jpeg";
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if (lower.endsWith(".png")) return "image/png";
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if (lower.endsWith(".gif")) return "image/gif";
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if (lower.endsWith(".webp")) return "image/webp";
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if (lower.endsWith(".bmp")) return "image/bmp";
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}
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return sniffImageType(data);
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}
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private String sniffImageType(byte[] header) {
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if (header == null) return null;
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if (header.length >= 8
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&& header[0] == (byte) 0x89 && header[1] == 0x50
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&& header[2] == 0x4E && header[3] == 0x47) {
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return "image/png";
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}
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if (header.length >= 3
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&& header[0] == (byte) 0xFF && header[1] == (byte) 0xD8 && header[2] == (byte) 0xFF) {
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return "image/jpeg";
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}
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if (header.length >= 6
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&& header[0] == 0x47 && header[1] == 0x49 && header[2] == 0x46) {
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return "image/gif";
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}
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if (header.length >= 12
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&& header[0] == 0x52 && header[1] == 0x49 && header[2] == 0x46 && header[3] == 0x46
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&& header[8] == 0x57 && header[9] == 0x45 && header[10] == 0x42 && header[11] == 0x50) {
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return "image/webp";
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}
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if (header.length >= 2 && header[0] == 0x42 && header[1] == 0x4D) {
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return "image/bmp";
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}
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return null;
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}
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private void deletePhysicalFile(String storagePath) throws IOException {
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Path path = uploadRoot.resolve(storagePath).normalize();
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if (path.startsWith(uploadRoot)) {
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Files.deleteIfExists(path);
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}
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}
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private String sanitizeFileName(String name) {
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if (name == null || name.isBlank()) return "image.png";
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String base = Paths.get(name).getFileName().toString();
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return base.replaceAll("[^a-zA-Z0-9._\\-가-힣]", "_");
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}
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private VerificationIssueImageDto toDto(GcVerificationIssueImage e) {
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return VerificationIssueImageDto.builder()
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.id(e.getId())
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.issueId(e.getIssueId())
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.fileName(e.getFileName())
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.contentType(e.getContentType())
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.fileSize(e.getFileSize())
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.sortOrder(e.getSortOrder())
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.url("/verification-issues/" + e.getIssueId() + "/images/" + e.getId() + "/file")
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.createdAt(e.getCreatedAt())
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.build();
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}
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}
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