feat: new api /tags/hierarchical

luoo_tag/src/main/java/com/luoo/tag/controller/TagInfoController.java

@@ -84,4 +84,10 @@ public class TagInfoController {
 	public Result<List<UserInfo>> queryCreator() {
 		return Result.success(tagService.queryCreator());
 	}
+
+	@ApiOperation(value = "查询(层级)标签列表", notes = "查询(层级)标签列表")
+	@GetMapping("/hierarchical")
+	public Result<List<TagHierarchicalDTO>> queryHierarchicalTagList() {
+		return Result.success(tagService.queryHierarchicalTagList());
+	}
 }

luoo_tag/src/main/java/com/luoo/tag/pojo/TagHierarchicalDTO.java

@@ -0,0 +1,26 @@
+package com.luoo.tag.pojo;
+
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import lombok.Data;
+
+import java.io.Serializable;
+import java.util.List;
+
+@Data
+@ApiModel(value = "标签层级对象DTO")
+public class TagHierarchicalDTO implements Serializable {
+    private static final long serialVersionUID = -1198060864891902188L;
+
+    @ApiModelProperty(value = "标签ID")
+    private String id;
+
+    @ApiModelProperty(value = "标签中文名称")
+    private String nameCh;
+
+    @ApiModelProperty(value = "标签英文名称")
+    private String nameEn;
+
+    @ApiModelProperty(value = "子标签集合")
+    private List<TagHierarchicalDTO> children;
+}

luoo_tag/src/main/java/com/luoo/tag/service/TagService.java

@@ -27,8 +27,7 @@ import java.time.LocalDateTime;
 import java.util.*;
 import java.util.function.Function;
 
-import static java.util.stream.Collectors.toList;
-import static java.util.stream.Collectors.toMap;
+import static java.util.stream.Collectors.*;
 
 /**
  * 标签服务层
@@ -342,4 +341,32 @@ public class TagService {
 			return criteriaBuilder.and(predicateList.toArray(predicates));
 		};
 	}
+
+	/**
+	 * 获取标签层级结构数据
+	 * @return 层级标签集合
+	 */
+	public List<TagHierarchicalDTO> queryHierarchicalTagList() {
+		List<Tag> tagList = tagDao.findAll();
+		Map<String, List<Tag>> tagMap = tagList.stream().collect(groupingBy(Tag::getParentId));
+		List<Tag> rootTagList = tagMap.get(StringUtils.EMPTY);
+		List<TagHierarchicalDTO> tagHierarchicalDTOList = Lists.newArrayList();
+		rootTagList.forEach(tag -> {
+			TagHierarchicalDTO tagHierarchicalDTO = new TagHierarchicalDTO();
+			BeanUtils.copyProperties(tag, tagHierarchicalDTO);
+			tagHierarchicalDTOList.add(tagHierarchicalDTO);
+
+			List<Tag> childTagList = tagMap.get(tag.getId());
+			if(CollectionUtils.isEmpty(childTagList)){
+				return;
+			}
+			List<TagHierarchicalDTO> childTagHierarchicalDTOList = childTagList.stream().map(childTag -> {
+				TagHierarchicalDTO childTagHierarchicalDTO = new TagHierarchicalDTO();
+				BeanUtils.copyProperties(childTag, childTagHierarchicalDTO);
+				return childTagHierarchicalDTO;
+			}).collect(toList());
+			tagHierarchicalDTO.setChildren(childTagHierarchicalDTOList);
+		});
+		return tagHierarchicalDTOList;
+	}
 }