feat: 个人信息修改

src/main/java/com/webgame/webgamebackend/service/impl/UserServiceImpl.java

@@ -13,6 +13,13 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Set;
 
 /**
  * 用户服务实现
@@ -22,6 +29,15 @@ import org.springframework.transaction.annotation.Transactional;
 @RequiredArgsConstructor
 public class UserServiceImpl implements UserService {
 
+    /** 头像存储目录（相对于项目工作目录） */
+    private static final String AVATAR_DIR = "uploads/avatars";
+    /** 允许的头像文件类型 */
+    private static final Set<String> ALLOWED_CONTENT_TYPES = Set.of(
+            "image/jpeg", "image/png", "image/webp", "image/gif"
+    );
+    /** 头像文件大小上限（2MB） */
+    private static final long MAX_AVATAR_SIZE = 2 * 1024 * 1024;
+
     private final UserRepository userRepository;
 
     @Override
@@ -74,4 +90,84 @@ public class UserServiceImpl implements UserService {
         userRepository.save(user);
         log.info("[用户服务] 更新在线状态, accountId={}, status={}", accountId, request.status());
     }
+
+    @Override
+    @Transactional
+    public UserInfoResponse uploadAvatar(String accountId, MultipartFile file) {
+        // 校验文件类型
+        String contentType = file.getContentType();
+        if (contentType == null || !ALLOWED_CONTENT_TYPES.contains(contentType)) {
+            throw new BusinessException(ErrorCode.AVATAR_INVALID_TYPE);
+        }
+
+        // 校验文件大小
+        if (file.getSize() > MAX_AVATAR_SIZE) {
+            throw new BusinessException(ErrorCode.AVATAR_TOO_LARGE);
+        }
+
+        UserEntity user = userRepository.findByAccountId(accountId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.USER_NOT_FOUND));
+
+        try {
+            // 确保目录存在
+            Path avatarDir = Paths.get(AVATAR_DIR);
+            Files.createDirectories(avatarDir);
+
+            // 删除旧头像文件（如果存在且不是默认 SVG）
+            deleteOldAvatarFile(user.getAvatar());
+
+            // 保存新头像：uploads/avatars/{accountId}.jpg
+            String filename = accountId + ".jpg";
+            Path targetPath = avatarDir.resolve(filename);
+            file.transferTo(targetPath.toFile());
+
+            // 更新数据库
+            String avatarUrl = "/" + AVATAR_DIR + "/" + filename;
+            user.setAvatar(avatarUrl);
+            userRepository.save(user);
+
+            log.info("[用户服务] 头像上传成功, accountId={}, path={}", accountId, avatarUrl);
+            return UserInfoResponse.from(user);
+        } catch (IOException e) {
+            log.error("[用户服务] 头像上传失败, accountId={}", accountId, e);
+            throw new BusinessException(ErrorCode.AVATAR_UPLOAD_FAILED, "头像保存失败，请重试");
+        }
+    }
+
+    @Override
+    @Transactional
+    public UserInfoResponse deleteAvatar(String accountId) {
+        UserEntity user = userRepository.findByAccountId(accountId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.USER_NOT_FOUND));
+
+        // 删除旧头像文件
+        deleteOldAvatarFile(user.getAvatar());
+
+        // 数据库置空（前端会回退显示默认头像）
+        user.setAvatar(null);
+        userRepository.save(user);
+
+        log.info("[用户服务] 头像已删除, accountId={}", accountId);
+        return UserInfoResponse.from(user);
+    }
+
+    /**
+     * 删除旧的用户头像文件
+     *
+     * 仅删除 uploads/avatars/ 下的文件，跳过默认 SVG 和非本地路径。
+     *
+     * @param avatarPath 头像路径，可能为 null
+     */
+    private void deleteOldAvatarFile(String avatarPath) {
+        if (avatarPath == null || !avatarPath.startsWith("/" + AVATAR_DIR + "/")) {
+            return;
+        }
+        try {
+            Path oldFile = Paths.get(avatarPath.substring(1)); // 去掉开头的 /
+            Files.deleteIfExists(oldFile);
+            log.debug("[用户服务] 旧头像已删除: {}", oldFile);
+        } catch (IOException e) {
+            log.warn("[用户服务] 旧头像删除失败: {}", avatarPath, e);
+        }
+    }
 }