3.10 图片模块增删查改完成
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@ -1,6 +1,7 @@
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package edu.whut.smilepicturebackend.controller;
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import cn.hutool.json.JSONUtil;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import edu.whut.smilepicturebackend.annotation.AuthCheck;
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import edu.whut.smilepicturebackend.common.BaseResponse;
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import edu.whut.smilepicturebackend.common.DeleteRequest;
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@ -9,10 +10,13 @@ import edu.whut.smilepicturebackend.constant.UserConstant;
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import edu.whut.smilepicturebackend.exception.BusinessException;
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import edu.whut.smilepicturebackend.exception.ErrorCode;
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import edu.whut.smilepicturebackend.exception.ThrowUtils;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureEditRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureQueryRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureUpdateRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureUploadRequest;
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import edu.whut.smilepicturebackend.model.entity.Picture;
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import edu.whut.smilepicturebackend.model.entity.User;
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import edu.whut.smilepicturebackend.model.vo.PictureTagCategory;
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import edu.whut.smilepicturebackend.model.vo.PictureVO;
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import edu.whut.smilepicturebackend.service.PictureService;
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import edu.whut.smilepicturebackend.service.UserService;
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@ -23,6 +27,7 @@ import org.springframework.web.bind.annotation.*;
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import org.springframework.web.multipart.MultipartFile;
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import javax.servlet.http.HttpServletRequest;
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import java.util.Arrays;
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import java.util.List;
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@Slf4j
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@ -93,7 +98,7 @@ public class PictureController {
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Picture picture = new Picture();
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BeanUtils.copyProperties(pictureUpdateRequest, picture);
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// 注意将 list 转为 string
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//todo:其他地方是否有问题？？
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// List.of("Java", "Python", "AI") --> "["Java", "Python", "AI"]"
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picture.setTags(JSONUtil.toJsonStr(pictureUpdateRequest.getTags()));
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// 数据校验
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pictureService.validPicture(picture);
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@ -134,4 +139,58 @@ public class PictureController {
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// 获取封装类
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return ResultUtils.success(pictureService.getPictureVO(picture, request));
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}
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/**
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* 分页获取图片列表（仅管理员可用）
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*/
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@PostMapping("/list/page")
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@AuthCheck(mustRole = UserConstant.ADMIN_ROLE)
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public BaseResponse<Page<Picture>> listPictureByPage(@RequestBody PictureQueryRequest pictureQueryRequest) {
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long current = pictureQueryRequest.getCurrent();
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long size = pictureQueryRequest.getPageSize();
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// 查询数据库
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Page<Picture> picturePage = pictureService.page(new Page<>(current, size),
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pictureService.getQueryWrapper(pictureQueryRequest));
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return ResultUtils.success(picturePage);
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}
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/**
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* 分页获取图片列表（封装类，脱敏）
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*/
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@PostMapping("/list/page/vo")
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public BaseResponse<Page<PictureVO>> listPictureVOByPage(@RequestBody PictureQueryRequest pictureQueryRequest,
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HttpServletRequest request) {
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long current = pictureQueryRequest.getCurrent();
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long size = pictureQueryRequest.getPageSize();
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// 限制爬虫，一次不能请求超过20页
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ThrowUtils.throwIf(size > 20, ErrorCode.PARAMS_ERROR);
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// 查询数据库
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Page<Picture> picturePage = pictureService.page(new Page<>(current, size),
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pictureService.getQueryWrapper(pictureQueryRequest));
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// 获取封装类
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return ResultUtils.success(pictureService.getPictureVOPage(picturePage, request));
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}
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/**
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* 编辑图片（给用户使用）
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*/
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@PostMapping("/edit")
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public BaseResponse<Boolean> editPicture(@RequestBody PictureEditRequest pictureEditRequest, HttpServletRequest request) {
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if (pictureEditRequest == null || pictureEditRequest.getId() <= 0) {
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throw new BusinessException(ErrorCode.PARAMS_ERROR);
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}
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User loginUser = userService.getLoginUser(request);
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pictureService.editPicture(pictureEditRequest, loginUser);
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return ResultUtils.success(true);
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}
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@GetMapping("/tag_category")
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public BaseResponse<PictureTagCategory> listPictureTagCategory() {
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PictureTagCategory pictureTagCategory = new PictureTagCategory();
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List<String> tagList = Arrays.asList("热门", "搞笑", "生活", "高清", "艺术", "校园", "背景", "简历", "创意");
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List<String> categoryList = Arrays.asList("模板", "电商", "表情包", "素材", "海报");
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pictureTagCategory.setTagList(tagList);
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pictureTagCategory.setCategoryList(categoryList);
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return ResultUtils.success(pictureTagCategory);
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}
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}
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@ -0,0 +1,22 @@
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package edu.whut.smilepicturebackend.model.vo;
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import lombok.Data;
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import java.util.List;
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/**
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* 图片标签分类列表视图
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*/
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@Data
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public class PictureTagCategory {
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/**
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* 标签列表
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*/
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private List<String> tagList;
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/**
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* 分类列表
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*/
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private List<String> categoryList;
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}
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@ -4,6 +4,7 @@ import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.baomidou.mybatisplus.extension.service.IService;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureEditRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureQueryRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureUploadRequest;
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import edu.whut.smilepicturebackend.model.entity.Picture;
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@ -61,4 +62,12 @@ public interface PictureService extends IService<Picture> {
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* @return
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*/
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Page<PictureVO> getPictureVOPage(Page<Picture> picturePage, HttpServletRequest request);
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/**
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* 编辑图片
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*
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* @param pictureEditRequest
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* @param loginUser
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*/
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void editPicture(PictureEditRequest pictureEditRequest, User loginUser);
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}
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@ -3,14 +3,17 @@ package edu.whut.smilepicturebackend.service.impl;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.util.ObjUtil;
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import cn.hutool.core.util.StrUtil;
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import cn.hutool.json.JSONUtil;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.core.toolkit.Wrappers;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import edu.whut.smilepicturebackend.exception.BusinessException;
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import edu.whut.smilepicturebackend.exception.ErrorCode;
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import edu.whut.smilepicturebackend.exception.ThrowUtils;
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import edu.whut.smilepicturebackend.manager.FileManager;
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import edu.whut.smilepicturebackend.mapper.PictureMapper;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureEditRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureQueryRequest;
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import edu.whut.smilepicturebackend.model.dto.picture.PictureUploadRequest;
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import edu.whut.smilepicturebackend.model.entity.Picture;
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@ -162,24 +165,30 @@ public class PictureServiceImpl extends ServiceImpl<PictureMapper, Picture>
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return pictureVO;
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}
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/**
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* 分页获取图片封装
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*/
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@Override
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public Page<PictureVO> getPictureVOPage(Page<Picture> picturePage, HttpServletRequest request) {
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//从 Page<Picture> 中拿到原始记录和分页元数据
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List<Picture> pictureList = picturePage.getRecords();
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Page<PictureVO> pictureVOPage = new Page<>(picturePage.getCurrent(), picturePage.getSize(), picturePage.getTotal());
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if (CollUtil.isEmpty(pictureList)) {
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return pictureVOPage;
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}
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// 对象列表 => 封装对象列表
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// 实体到 VO 的基本映射
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List<PictureVO> pictureVOList = pictureList.stream()
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.map(PictureVO::objToVo)
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.collect(Collectors.toList());
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// 1. 关联查询用户信息
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// 1,2,3,4
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//批量拉取关联的用户信息
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//先从所有 Picture 里摘出不重复的 userId。
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//调 userService.listByIds(...) 一次性把这些用户都查出来，避免 N+1 查询。
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//再把结果按 userId 分组，方便快速根据 ID 拿到对应的 User 对象。
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Set<Long> userIdSet = pictureList.stream().map(Picture::getUserId).collect(Collectors.toSet());
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// 1 => user1, 2 => user2
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Map<Long, List<User>> userIdUserListMap = userService.listByIds(userIdSet).stream()
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.collect(Collectors.groupingBy(User::getId));
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// 2. 填充信息
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// 把用户信息填充到 VO
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pictureVOList.forEach(pictureVO -> {
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Long userId = pictureVO.getUserId();
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User user = null;
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@ -191,6 +200,30 @@ public class PictureServiceImpl extends ServiceImpl<PictureMapper, Picture>
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pictureVOPage.setRecords(pictureVOList);
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return pictureVOPage;
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}
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@Override
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public void editPicture(PictureEditRequest pictureEditRequest, User loginUser) {
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// 在此处将实体类和 DTO 进行转换
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Picture picture = new Picture();
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BeanUtils.copyProperties(pictureEditRequest, picture);
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// 注意将 list 转为 string
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picture.setTags(JSONUtil.toJsonStr(pictureEditRequest.getTags()));
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// 设置编辑时间
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picture.setEditTime(new Date());
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// 数据校验
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this.validPicture(picture);
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// 判断是否存在
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long id = pictureEditRequest.getId();
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Picture oldPicture = this.getById(id);
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ThrowUtils.throwIf(oldPicture == null, ErrorCode.NOT_FOUND_ERROR);
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// 校验权限，仅本人及管理员可编辑
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if(!oldPicture.getUserId().equals(loginUser.getId())&&!userService.isAdmin(loginUser))
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throw new BusinessException(ErrorCode.NO_AUTH_ERROR);
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// 操作数据库
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boolean result = this.updateById(picture);
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ThrowUtils.throwIf(!result, ErrorCode.OPERATION_ERROR);
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}
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}
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