feat: 题目详情 上一题/下一题功能

qing-yu-club-subject/qing-yu-club-domain/src/main/java/com/landaiqing/subject/domain/service/SubjectInfoDomainService.java

@@ -44,4 +44,5 @@ public interface SubjectInfoDomainService {
     PageResult<SubjectInfoEs> getSubjectPageBySearch(SubjectInfoBO subjectInfoBO);
 
     List<SubjectInfoBO> getContributeList();
+
 }

qing-yu-club-subject/qing-yu-club-domain/src/main/java/com/landaiqing/subject/domain/service/impl/SubjectInfoDomainServiceImpl.java

@@ -154,8 +154,22 @@ public class SubjectInfoDomainServiceImpl implements SubjectInfoDomainService {
         bo.setLabelName(labelNameList);
         bo.setLiked(subjectLikedDomainService.isLiked(subjectInfoBO.getId().toString(), LoginUtil.getLoginId()));
         bo.setLikedCount(subjectLikedDomainService.getLikedCount(subjectInfoBO.getId().toString()));
+
+        assembleSubjectCursor(subjectInfoBO,bo);
         return bo;
     }
+    private void assembleSubjectCursor(SubjectInfoBO subjectInfoBO, SubjectInfoBO bo) {
+        Long categoryId = subjectInfoBO.getCategoryId();
+        Long labelId = subjectInfoBO.getLabelId();
+        Long subjectId = subjectInfoBO.getId();
+        if (Objects.isNull(categoryId) || Objects.isNull(labelId)) {
+            return;
+        }
+        Long nextSubjectId = subjectInfoService.querySubjectIdCursor(subjectId, categoryId, labelId, 1);
+        bo.setNextSubjectId(nextSubjectId);
+        Long lastSubjectId = subjectInfoService.querySubjectIdCursor(subjectId, categoryId, labelId, 0);
+        bo.setLastSubjectId(lastSubjectId);
+    }
 
     @Override
     public PageResult<SubjectInfoEs> getSubjectPageBySearch(SubjectInfoBO subjectInfoBO) {

qing-yu-club-subject/qing-yu-club-infra/src/main/java/com/landaiqing/subject/infra/basic/mapper/SubjectInfoDao.java

@@ -90,5 +90,10 @@ public interface SubjectInfoDao {
                                 @Param("pageSize") Integer pageSize);
 
     List<SubjectInfo> getContributeCount();
+
+    Long querySubjectIdCursor(@Param("subjectId") Long subjectId,
+                              @Param("categoryId") Long categoryId,
+                              @Param("labelId") Long labelId,
+                              @Param("cursor") int cursor);
 }
 

qing-yu-club-subject/qing-yu-club-infra/src/main/java/com/landaiqing/subject/infra/basic/service/SubjectInfoService.java

@@ -50,4 +50,7 @@ public interface SubjectInfoService {
     List<SubjectInfo> queryPage(SubjectInfo subjectInfo, Long categoryId, Long labelId, int start, Integer pageSize);
 
     List<SubjectInfo> getContributeCount();
+
+    Long querySubjectIdCursor(Long subjectId, Long categoryId, Long labelId, int cursor);
+
 }

qing-yu-club-subject/qing-yu-club-infra/src/main/java/com/landaiqing/subject/infra/basic/service/impl/SubjectInfoServiceImpl.java

@@ -81,4 +81,9 @@ public class SubjectInfoServiceImpl implements SubjectInfoService {
     public List<SubjectInfo> getContributeCount() {
         return this.subjectInfoDao.getContributeCount();
     }
+
+    @Override
+    public Long querySubjectIdCursor(Long subjectId, Long categoryId, Long labelId, int cursor) {
+        return this.subjectInfoDao.querySubjectIdCursor(subjectId, categoryId, labelId, cursor);
+    }
 }

qing-yu-club-subject/qing-yu-club-infra/src/main/resources/mapper/SubjectInfoDao.xml

@@ -140,6 +140,23 @@
             and a.subject_type = #{subjectInfo.subjectType}
         </if>
     </select>
+
+    <select id="querySubjectIdCursor" resultType="java.lang.Long">
+        select a.id
+        from subject_info a,
+        subject_mapping b
+        where a.id = b.subject_id
+        and b.category_id = #{categoryId}
+        and b.label_id = #{labelId}
+        <if test="cursor !=null and cursor == 1">
+            and a.id > #{subjectId}
+        </if>
+        <if test="cursor !=null and cursor == 0">
+            and a.id &lt; #{subjectId}
+        </if>
+        limit 0,1
+    </select>
+
     <select id="queryPage" resultMap="SubjectInfoMap">
         select a.id,
         a.subject_name,