增加拖动改变文章顺序

zyplayer-doc-data/src/main/java/com/zyplayer/doc/data/repository/manage/entity/WikiPage.java

@@ -12,7 +12,7 @@ import java.util.Date;
  * </p>
  *
  * @author 暮光：城中城
- * @since 2019-06-05
+ * @since 2019-06-06
  */
 public class WikiPage implements Serializable {
 
@@ -94,6 +94,11 @@ public class WikiPage implements Serializable {
      */
     private Integer viewNum;
 
+    /**
+     * 顺序
+     */
+    private Integer seqNo;
+
     public Long getId() {
         return id;
     }
@@ -199,6 +204,13 @@ public class WikiPage implements Serializable {
     public void setViewNum(Integer viewNum) {
         this.viewNum = viewNum;
     }
+    public Integer getSeqNo() {
+        return seqNo;
+    }
+
+    public void setSeqNo(Integer seqNo) {
+        this.seqNo = seqNo;
+    }
 
     @Override
     public String toString() {
@@ -218,6 +230,7 @@ public class WikiPage implements Serializable {
         ", updateTime=" + updateTime +
         ", delFlag=" + delFlag +
         ", viewNum=" + viewNum +
+        ", seqNo=" + seqNo +
         "}";
     }
 }

zyplayer-doc-data/src/main/java/com/zyplayer/doc/data/repository/manage/mapper/WikiPageMapper.java

@@ -3,6 +3,7 @@ package com.zyplayer.doc.data.repository.manage.mapper;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.zyplayer.doc.data.repository.manage.entity.WikiPage;
 import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
 import org.apache.ibatis.annotations.Update;
 
 /**
@@ -17,4 +18,10 @@ public interface WikiPageMapper extends BaseMapper<WikiPage> {
 	
 	@Update("update wiki_page set zan_num=zan_num + #{numAdd} where id=#{id}")
 	void updateZanNum(@Param("id") Long id, @Param("numAdd") Integer numAdd);
+	
+	@Update("update wiki_page set seq_no=seq_no + 1 where parent_id=#{parentId} and seq_no >= #{afterSeq} and del_flag=0")
+	void updateAfterSeq(@Param("parentId") Long parentId, @Param("afterSeq") Integer afterSeq);
+	
+	@Select("select max(seq_no) from wiki_page where parent_id=#{parentId} and del_flag=0")
+	Integer getLastSeq(@Param("parentId") Long parentId);
 }

zyplayer-doc-data/src/main/java/com/zyplayer/doc/data/service/manage/WikiPageService.java

@@ -13,4 +13,6 @@ import com.baomidou.mybatisplus.extension.service.IService;
  */
 public interface WikiPageService extends IService<WikiPage> {
 
+	void changeParent(WikiPage wikiPage, Integer beforeSeq, Integer afterSeq);
+	
 }

zyplayer-doc-data/src/main/java/com/zyplayer/doc/data/service/manage/impl/WikiPageServiceImpl.java

@@ -1,11 +1,14 @@
 package com.zyplayer.doc.data.service.manage.impl;
 
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.zyplayer.doc.data.repository.manage.entity.WikiPage;
 import com.zyplayer.doc.data.repository.manage.mapper.WikiPageMapper;
 import com.zyplayer.doc.data.service.manage.WikiPageService;
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.stereotype.Service;
 
+import javax.annotation.Resource;
+import java.util.Optional;
+
 /**
  * <p>
  *  服务实现类
@@ -16,5 +19,26 @@ import org.springframework.stereotype.Service;
  */
 @Service
 public class WikiPageServiceImpl extends ServiceImpl<WikiPageMapper, WikiPage> implements WikiPageService {
-
+	
+	@Resource
+	WikiPageMapper wikiPageMapper;
+	
+	@Override
+	public void changeParent(WikiPage wikiPage, Integer beforeSeq, Integer afterSeq) {
+		if (beforeSeq != null && beforeSeq >= 0) {
+			// 在此seq之前
+			wikiPageMapper.updateAfterSeq(wikiPage.getParentId(), beforeSeq);
+			wikiPage.setSeqNo(beforeSeq);
+		} else if (afterSeq != null && afterSeq >= 0) {
+			// 在此seq之后
+			wikiPageMapper.updateAfterSeq(wikiPage.getParentId(), afterSeq + 1);
+			wikiPage.setSeqNo(afterSeq + 1);
+		} else {
+			// 放在末尾
+			Integer lastSeq = wikiPageMapper.getLastSeq(wikiPage.getParentId());
+			lastSeq = Optional.ofNullable(lastSeq).orElse(0);
+			wikiPage.setSeqNo(lastSeq + 1);
+		}
+		this.updateById(wikiPage);
+	}
 }

zyplayer-doc-data/src/main/java/com/zyplayer/doc/data/utils/CacheUtil.java

@@ -32,7 +32,7 @@ public class CacheUtil {
 			}
 		}, 0, 1000);
 	}
-	
+	// 现在是内存缓存，不支持分布式部署，后期考虑放到redis，但感觉也没必要。。
 	private static Map<String, Object> cacheMap = new ConcurrentHashMap<>();
 	private static Map<String, CacheTime> cacheTimeMap = new ConcurrentHashMap<>();