package com.tcm.training.admin.app.popularization.service;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.tcm.training.admin.app.popularization.vo.AppHealthPopularizationDetailVO;
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import com.tcm.training.admin.app.popularization.vo.AppHealthPopularizationListItemVO;
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import com.tcm.training.admin.live.entity.HealthPopularization;
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import com.tcm.training.admin.live.mapper.HealthPopularizationMapper;
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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.Collections;
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import java.util.List;
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/**
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* APP 健康科普详情聚合服务。
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*/
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@Service
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public class AppHealthPopularizationService {
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private static final int STATUS_ENABLED = 1;
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private final HealthPopularizationMapper healthPopularizationMapper;
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/**
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* 注入 APP 健康科普详情所需依赖。
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*/
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public AppHealthPopularizationService(HealthPopularizationMapper healthPopularizationMapper) {
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this.healthPopularizationMapper = healthPopularizationMapper;
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}
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/**
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* 获取 APP 健康科普列表页数据。
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*
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* @param contentType 内容类型：1 健康知识、2 养生科普；为空则返回全部。
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*/
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public List<AppHealthPopularizationListItemVO> list(Integer contentType) {
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List<HealthPopularization> items = healthPopularizationMapper.selectList(new LambdaQueryWrapper<HealthPopularization>()
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.eq(HealthPopularization::getDeleted, 0)
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.eq(HealthPopularization::getStatus, STATUS_ENABLED)
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.eq(contentType != null, HealthPopularization::getContentType, contentType)
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.orderByDesc(HealthPopularization::getSort)
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.orderByDesc(HealthPopularization::getId));
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if (items == null || items.isEmpty()) {
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return Collections.emptyList();
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}
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List<AppHealthPopularizationListItemVO> result =
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new ArrayList<AppHealthPopularizationListItemVO>(items.size());
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for (HealthPopularization item : items) {
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AppHealthPopularizationListItemVO listItemVO = new AppHealthPopularizationListItemVO();
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listItemVO.setId(item.getId());
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listItemVO.setTitle(trimToEmpty(item.getTitle()));
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listItemVO.setCoverImage(trimToEmpty(item.getCoverImg()));
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listItemVO.setContentType(item.getContentType());
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listItemVO.setClickCount(defaultNumber(item.getClickCount()));
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result.add(listItemVO);
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}
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return result;
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}
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/**
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* 获取 APP 健康科普详情页数据，并在每次访问时累加点击量。
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*/
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@Transactional(rollbackFor = Exception.class)
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public AppHealthPopularizationDetailVO detail(Long popularizationId) {
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HealthPopularization item = requireEnabledItem(popularizationId);
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// 参考项目介绍，APP 进入详情后累加点击量并回写。
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item.setClickCount(defaultNumber(item.getClickCount()) + 1);
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healthPopularizationMapper.updateById(item);
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AppHealthPopularizationDetailVO detailVO = new AppHealthPopularizationDetailVO();
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detailVO.setId(item.getId());
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detailVO.setTitle(trimToEmpty(item.getTitle()));
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detailVO.setCoverImage(trimToEmpty(item.getCoverImg()));
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detailVO.setContentType(item.getContentType());
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detailVO.setContentTypeText(resolveContentTypeText(item.getContentType()));
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detailVO.setContent(trimToEmpty(item.getContent()));
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detailVO.setVideoUrl(trimToEmpty(item.getVideoUrl()));
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detailVO.setVideoFileName(trimToEmpty(item.getVideoFileName()));
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detailVO.setVideoDescription(trimToEmpty(item.getVideoDescription()));
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detailVO.setClickCount(defaultNumber(item.getClickCount()));
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return detailVO;
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}
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/**
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* 查询启用中的健康科普详情，避免 APP 访问到后台下线内容。
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*/
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private HealthPopularization requireEnabledItem(Long popularizationId) {
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HealthPopularization item = healthPopularizationMapper.selectOne(new LambdaQueryWrapper<HealthPopularization>()
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.eq(HealthPopularization::getId, popularizationId)
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.eq(HealthPopularization::getDeleted, 0)
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.eq(HealthPopularization::getStatus, STATUS_ENABLED)
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.last("LIMIT 1"));
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if (item == null) {
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throw new IllegalArgumentException("健康科普不存在");
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}
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return item;
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}
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/**
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* 解析内容类型文案，便于前端按类型渲染页面。
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*/
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private String resolveContentTypeText(Integer contentType) {
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if (contentType != null && contentType.intValue() == HealthPopularization.CONTENT_TYPE_VIDEO) {
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return "视频";
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}
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return "图文";
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}
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/**
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* 将可空数字统一转换为默认值，避免前端列表展示空计数。
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*/
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private Integer defaultNumber(Integer value) {
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return value == null ? 0 : value;
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}
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/**
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* 将可空文本统一转换为空字符串。
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*/
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private String trimToEmpty(String value) {
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if (value == null) {
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return "";
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}
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String trimmed = value.trim();
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return trimmed.isEmpty() ? "" : trimmed;
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}
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}
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