package com.tcm.training.admin.live.service;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.core.metadata.IPage;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.tcm.training.admin.common.PageResponse;
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import com.tcm.training.admin.live.dto.LiveCourseCategorySaveRequest;
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import com.tcm.training.admin.live.entity.LiveCourseCategory;
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import com.tcm.training.admin.live.mapper.LiveCourseCategoryMapper;
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import com.tcm.training.admin.live.vo.LiveCourseCategoryDetailVO;
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import com.tcm.training.admin.live.vo.LiveCourseCategoryItemVO;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.util.ArrayList;
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import java.util.List;
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@Service
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public class LiveCourseCategoryAppService {
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public static final String TYPE_LEVEL = "LEVEL";
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public static final String TYPE_DIFFICULTY = "DIFFICULTY";
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private final LiveCourseCategoryMapper liveCourseCategoryMapper;
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public LiveCourseCategoryAppService(LiveCourseCategoryMapper liveCourseCategoryMapper) {
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this.liveCourseCategoryMapper = liveCourseCategoryMapper;
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}
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public PageResponse<LiveCourseCategoryItemVO> page(int page, int pageSize, String type) {
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String normalizedType = normalizeType(type);
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LambdaQueryWrapper<LiveCourseCategory> qw = new LambdaQueryWrapper<LiveCourseCategory>()
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.eq(LiveCourseCategory::getType, normalizedType)
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.orderByAsc(LiveCourseCategory::getSort)
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.orderByAsc(LiveCourseCategory::getId);
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IPage<LiveCourseCategory> p = liveCourseCategoryMapper.selectPage(new Page<LiveCourseCategory>(page, pageSize), qw);
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List<LiveCourseCategoryItemVO> list = new ArrayList<LiveCourseCategoryItemVO>();
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for (LiveCourseCategory item : p.getRecords()) {
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list.add(new LiveCourseCategoryItemVO(
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item.getId(),
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item.getType(),
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item.getName(),
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item.getSort(),
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item.getCreatedAt()
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));
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}
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return PageResponse.of(list, p.getTotal(), p.getCurrent(), p.getSize());
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}
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public LiveCourseCategoryDetailVO detail(Long id) {
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return toDetailVO(requireCategory(id));
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}
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@Transactional
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public LiveCourseCategoryDetailVO create(String type, LiveCourseCategorySaveRequest req) {
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String normalizedType = normalizeType(type);
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String name = normalizeName(req.getName());
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validateUniqueName(normalizedType, name, null);
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LiveCourseCategory entity = new LiveCourseCategory();
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entity.setType(normalizedType);
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entity.setName(name);
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entity.setSort(resolveSort(req.getSort()));
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entity.setDeleted(0);
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liveCourseCategoryMapper.insert(entity);
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return detail(entity.getId());
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}
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@Transactional
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public LiveCourseCategoryDetailVO update(Long id, LiveCourseCategorySaveRequest req) {
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LiveCourseCategory entity = requireCategory(id);
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String name = normalizeName(req.getName());
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validateUniqueName(entity.getType(), name, id);
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entity.setName(name);
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entity.setSort(resolveSort(req.getSort()));
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liveCourseCategoryMapper.updateById(entity);
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return detail(id);
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}
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@Transactional
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public void delete(Long id) {
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requireCategory(id);
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liveCourseCategoryMapper.deleteById(id);
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}
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private LiveCourseCategory requireCategory(Long id) {
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LiveCourseCategory entity = liveCourseCategoryMapper.selectOne(new LambdaQueryWrapper<LiveCourseCategory>()
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.eq(LiveCourseCategory::getId, id)
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.eq(LiveCourseCategory::getDeleted, 0)
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.last("limit 1"));
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if (entity == null) {
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throw new IllegalArgumentException("分类不存在");
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}
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return entity;
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}
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private void validateUniqueName(String type, String name, Long excludeId) {
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LambdaQueryWrapper<LiveCourseCategory> qw = new LambdaQueryWrapper<LiveCourseCategory>()
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.eq(LiveCourseCategory::getType, type)
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.eq(LiveCourseCategory::getName, name)
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.eq(LiveCourseCategory::getDeleted, 0);
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if (excludeId != null) {
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qw.ne(LiveCourseCategory::getId, excludeId);
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}
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Long count = liveCourseCategoryMapper.selectCount(qw);
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if (count != null && count > 0) {
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throw new IllegalArgumentException(resolveLabel(type) + "名称已存在");
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}
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}
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private String normalizeType(String type) {
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if (type == null) {
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throw new IllegalArgumentException("分类类型不能为空");
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}
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String normalized = type.trim().toUpperCase();
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if (!TYPE_LEVEL.equals(normalized) && !TYPE_DIFFICULTY.equals(normalized)) {
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throw new IllegalArgumentException("分类类型不合法");
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}
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return normalized;
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}
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private String normalizeName(String name) {
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String normalized = name == null ? "" : name.trim();
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if (normalized.isEmpty()) {
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throw new IllegalArgumentException("请输入分类名称");
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}
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return normalized;
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}
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private Integer resolveSort(Integer sort) {
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return sort == null ? 0 : sort;
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}
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private String resolveLabel(String type) {
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return TYPE_LEVEL.equals(type) ? "养生主题" : "难度";
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}
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private LiveCourseCategoryDetailVO toDetailVO(LiveCourseCategory entity) {
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LiveCourseCategoryDetailVO vo = new LiveCourseCategoryDetailVO();
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vo.setId(entity.getId());
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vo.setType(entity.getType());
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vo.setName(entity.getName());
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vo.setSort(entity.getSort());
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vo.setCreatedAt(entity.getCreatedAt());
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vo.setUpdatedAt(entity.getUpdatedAt());
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return vo;
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}
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}
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