目录拖动

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/controller/file/SysCatalogTextbookController.java

@@ -12,6 +12,7 @@ import org.dromara.common.log.enums.BusinessType;
 import org.dromara.common.mybatis.core.page.PageQuery;
 import org.dromara.common.mybatis.core.page.TableDataInfo;
 import org.dromara.common.web.core.BaseController;
+import org.dromara.system.domain.bo.CatalogDragBo;
 import org.dromara.system.domain.bo.SysCatalogTextbookBo;
 import org.dromara.system.domain.vo.SysCatalogTextbookVo;
 import org.dromara.system.service.ISysCatalogTextbookService;
@@ -116,4 +117,16 @@ public class SysCatalogTextbookController extends BaseController {
         }
         return toAjax(textbookService.deleteById(catalogId));
     }
+
+    /**
+     * 拖动目录-同步教材
+     *
+     * @param bo 拖动类
+     */
+    @SaCheckPermission("catalog:textbook:edit")
+    @Log(title = "目录-同步教材", businessType = BusinessType.DELETE)
+    @DeleteMapping("/{catalogId}")
+    public R<Void> drag(@Validated @RequestBody CatalogDragBo bo) {
+        return toAjax(textbookService.dragCatalog(bo));
+    }
 }

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/domain/SysCatalogTextbook.java

@@ -52,4 +52,10 @@ public class SysCatalogTextbook extends TenantEntity {
      */
     private Integer type;
 
+    /**
+     * 删除标志（0代表存在 2代表删除）
+     */
+    @TableLogic
+    private String delFlag;
+
 }

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/domain/bo/CatalogDragBo.java

@@ -0,0 +1,22 @@
+package org.dromara.system.domain.bo;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+/**
+ * <p>TODO<p>
+ *
+ * @author cjw
+ * @version V1.0.0
+ * @date 2024/7/12 10:41
+ */
+@Data
+public class CatalogDragBo {
+    @NotNull(message = "旧目录id不能为空")
+    private Long oldCatalog;
+    @NotNull(message = "新目录id不能为空")
+    private Long newCatalog;
+    @NotBlank(message = "位置信息不能为空")
+    private String position;
+}

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/mapper/SysCatalogTextbookMapper.java

@@ -19,5 +19,11 @@ public interface SysCatalogTextbookMapper extends BaseMapperPlus<SysCatalogTextb
 
     Page<SysCatalogTextbookVo> selectPageUserList(@Param("page") Page<SysCatalogTextbook> page, @Param("catalogId") Long catalogId);
 
+    int selectMaxOrderNumByParentId(Long parentId);
+
+    int addOrderNum(@Param("mix") Long mix, @Param("max") Long max);
+
+    int subOrderNum(@Param("mix") Long mix,  @Param("max")  Long max);
+
 
 }

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/ISysCatalogTextbookService.java

@@ -6,6 +6,7 @@ import com.baomidou.mybatisplus.core.conditions.Wrapper;
 import org.dromara.common.mybatis.core.page.PageQuery;
 import org.dromara.common.mybatis.core.page.TableDataInfo;
 import org.dromara.system.domain.SysCatalogTextbook;
+import org.dromara.system.domain.bo.CatalogDragBo;
 import org.dromara.system.domain.bo.SysCatalogTextbookBo;
 import org.dromara.system.domain.vo.SysCatalogTextbookVo;
 
@@ -118,4 +119,6 @@ public interface ISysCatalogTextbookService {
      * @return 下拉树结构列表
      */
     List<Tree<Long>> buildTreeSelect(SysCatalogTextbookBo bo);
+
+    boolean dragCatalog(CatalogDragBo bo);
 }

ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysCatalogTextbookServiceImpl.java

@@ -4,12 +4,14 @@ import cn.hutool.core.collection.CollUtil;
 import cn.hutool.core.convert.Convert;
 import cn.hutool.core.lang.tree.Tree;
 import cn.hutool.core.util.ObjectUtil;
+import com.baomidou.lock.annotation.Lock4j;
 import com.baomidou.mybatisplus.core.conditions.Wrapper;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import lombok.RequiredArgsConstructor;
 import org.dromara.common.core.constant.CacheNames;
+import org.dromara.common.core.exception.ServiceException;
 import org.dromara.common.core.utils.MapstructUtils;
 import org.dromara.common.core.utils.SpringUtils;
 import org.dromara.common.core.utils.StringUtils;
@@ -20,6 +22,7 @@ import org.dromara.common.mybatis.helper.DataBaseHelper;
 import org.dromara.common.redis.utils.CacheUtils;
 import org.dromara.system.domain.SysCatalogTextbook;
 import org.dromara.system.domain.SysOssTextbook;
+import org.dromara.system.domain.bo.CatalogDragBo;
 import org.dromara.system.domain.bo.SysCatalogTextbookBo;
 import org.dromara.system.domain.vo.SysCatalogTextbookVo;
 import org.dromara.system.mapper.SysCatalogTextbookMapper;
@@ -91,11 +94,15 @@ public class SysCatalogTextbookServiceImpl implements ISysCatalogTextbookService
      * @param bo 目录-同步教材
      * @return 是否新增成功
      */
+    @Lock4j
     @Override
     public Boolean insertByBo(SysCatalogTextbookBo bo) {
-        SysCatalogTextbook info = baseMapper.selectById(bo.getParentId());
+        Long parentId = bo.getParentId();
+        SysCatalogTextbook info = baseMapper.selectById(parentId);
+        int orderNum = baseMapper.selectMaxOrderNumByParentId(parentId) + 1;
         SysCatalogTextbook add = MapstructUtils.convert(bo, SysCatalogTextbook.class);
         add.setAncestors(info.getAncestors() + StringUtils.SEPARATOR + add.getParentId());
+        add.setOrderNum((long) orderNum);
         String[] split = StringUtils.split(add.getAncestors(), StringUtils.SEPARATOR);
         if (split.length < 7) {
             add.setType(split.length);
@@ -204,6 +211,48 @@ public class SysCatalogTextbookServiceImpl implements ISysCatalogTextbookService
         return buildCatalogTreeSelect(voList);
     }
 
+    @Override
+    public boolean dragCatalog(CatalogDragBo bo) {
+        Long oldCatalogId = bo.getOldCatalog();
+        Long newCatalogId = bo.getNewCatalog();
+        SysCatalogTextbook oldCatalog = baseMapper.selectById(oldCatalogId);
+        SysCatalogTextbook newCatalog = baseMapper.selectById(newCatalogId);
+        if (!oldCatalog.getParentId().equals(newCatalog.getParentId())) {
+            throw new ServiceException("只支持同级目录的拖动");
+        }
+        if (oldCatalogId.equals(newCatalogId)) {
+            throw new ServiceException("不支持单个目录的拖动");
+        }
+        Long oldOrder = oldCatalog.getOrderNum();
+        Long newOrder = newCatalog.getOrderNum();
+        boolean upFlag = oldOrder > newOrder;
+        String position = bo.getPosition();
+        //移动到new的前面
+        if ("before".equals(position)) {
+            if (upFlag) {
+                //上移
+                int i = baseMapper.addOrderNum(newOrder - 1, oldOrder);
+            } else {
+                //下移
+                baseMapper.subOrderNum(oldOrder, newOrder);
+            }
+        } else if ("after".equals(position)) {
+            if (upFlag) {
+                //上移
+                int i = baseMapper.addOrderNum(newOrder, oldOrder);
+            } else {
+                //下移
+                baseMapper.subOrderNum(oldOrder, newOrder + 1);
+            }
+        } else {
+            throw new ServiceException("不支持的拖动方式");
+        }
+        SysCatalogTextbook update = new SysCatalogTextbook();
+        update.setCatalogId(oldCatalogId);
+        update.setOrderNum(newOrder);
+        return baseMapper.updateById(update) > 0;
+    }
+
     //@Override
     private List<Tree<Long>> buildCatalogTreeSelect(List<SysCatalogTextbookVo> catalogs) {
         if (CollUtil.isEmpty(catalogs)) {

ruoyi-modules/ruoyi-system/src/main/resources/mapper/system/SysCatalogTextbookMapper.xml

@@ -12,4 +12,36 @@
         having ct.parent_id = #{catalogId}
         order by ct.order_num
     </select>
+
+    <select id="selectMaxOrderNumByParentId" resultType="int">
+        select IFNULL(Max(order_num),0)
+        from sys_catalog_textbook
+        where parent_id = #{parentId}
+    </select>
+
+    <update id="addOrderNum">
+        update sys_catalog_textbook
+        set order_num = order_num + 1
+        <where>
+            <if test="mix != null">
+                order_num &gt; #{mix}
+            </if>
+            <if test="max != null">
+                and order_num &lt; #{mix}
+            </if>
+        </where>
+    </update>
+
+    <update id="subOrderNum">
+        update sys_catalog_textbook
+        set order_num = order_num - 1
+        <where>
+            <if test="mix != null">
+                order_num &gt; #{mix}
+            </if>
+            <if test="max != null">
+                and order_num &lt; #{mix}
+            </if>
+        </where>
+    </update>
 </mapper>