es 查询

package com.heima.search.service.impl;

import com.alibaba.fastjson.JSON;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.model.user.pojos.ApUser;
import com.heima.search.model.UserSearchDto.UserSearchDto;
import com.heima.search.service.ApUserSearchService;
import com.heima.search.service.ArticleSearchService;
import com.heima.utils.thread.AppThreadLocalUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.avro.data.Json;
import org.apache.commons.lang3.StringUtils;
import org.apache.lucene.search.TotalHits;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class ArticleSearchServiceImpl implements ArticleSearchService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    @Autowired
    private ApUserSearchService apUserSearchService;

    /**
     * es文章分页检索
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult search(UserSearchDto dto) throws IOException {

//        if(StringUtils.isBlank(dto.getSearchWords()) || null == dto){
//            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
//        }
//
//        SearchRequest request = new SearchRequest("app_info_article");
//        SearchSourceBuilder builder = new SearchSourceBuilder();
//        //关键词的分词之后查询
//        QueryStringQueryBuilder queryStringQueryBuilder1 = QueryBuilders.queryStringQuery(dto.getSearchWords()).
//                field("title").field("content").defaultOperator(Operator.OR);
//        //小于mindate的数据
//        BoolQueryBuilder boolQueryBuilder1 = QueryBuilders.boolQuery();
//        //range就是根据某个范围来进行查询     同时是getTime毫秒值就是时间戳的意思
//        RangeQueryBuilder publishTime = QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime().getTime());
//        boolQueryBuilder1.filter(publishTime);
//        //分页查询
//        builder.from(0);
//        builder.size(dto.getPageSize());
//        //按照发布时间倒序排序
//
//        request.source().sort("publishTime",SortOrder.DESC);
//
//
//        //高亮
//
//        HighlightBuilder highlightBuilder = new HighlightBuilder();
//        highlightBuilder.field("title");
//        //高亮的颜色和字体
//        builder.highlighter(highlightBuilder);
//
//        highlightBuilder.preTags();
//        highlightBuilder.postTags();
//        builder.query(boolQueryBuilder1);
//        request.source(builder);
//        SearchResponse search = restHighLevelClient.search(request, RequestOptions.DEFAULT);
//




        //1.检查参数
        if(dto == null || StringUtils.isBlank(dto.getSearchWords())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        ApUser user = AppThreadLocalUtil.getUser();

        //异步调用 保存搜索记录
        if(user != null && dto.getFromIndex() == 0){
            apUserSearchService.insert(dto.getSearchWords(), user.getId());
        }


        //2.设置查询条件
        SearchRequest searchRequest = new SearchRequest("app_info_article");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        //布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();

        //关键字的分词之后查询
        QueryStringQueryBuilder queryStringQueryBuilder = QueryBuilders.queryStringQuery(dto.getSearchWords()).field("title").field("content").defaultOperator(Operator.OR);
        boolQueryBuilder.must(queryStringQueryBuilder);

        //查询小于mindate的数据 同时是getTime毫秒值就是时间戳的意思
        RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime().getTime());
        boolQueryBuilder.filter(rangeQueryBuilder);

        //分页查询
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(dto.getPageSize());

        //按照发布时间倒序查询
        searchSourceBuilder.sort("publishTime", SortOrder.DESC);

        //设置高亮  title
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        highlightBuilder.preTags("<font style='color: red; font-size: inherit;'>");
        highlightBuilder.postTags("</font>");
        searchSourceBuilder.highlighter(highlightBuilder);


        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);


        //3.结果封装返回

        List<Map> list = new ArrayList<>();
        //hit 是命中数
        SearchHits hits1 = searchResponse.getHits();
        //命中的总条数
        TotalHits totalHits = hits1.getTotalHits();

//        SearchHit[] hits2 = searchResponse.getHits().getHits();
//        for (SearchHit documentFields : hits2) {
//            String sourceAsString = documentFields.getSourceAsString();
//            Map map = JSON.parseObject(sourceAsString, Map.class);
//        }


        SearchHit[] hits = searchResponse.getHits().getHits();
        for (SearchHit hit : hits) {
            String json = hit.getSourceAsString();
            Map map = JSON.parseObject(json, Map.class);
            //处理高亮
            if(hit.getHighlightFields() != null && hit.getHighlightFields().size() > 0){
                //同时可能有多个高亮，需要同时拿到
                Text[] titles = hit.getHighlightFields().get("title").getFragments();
                String title = StringUtils.join(titles);
                //高亮标题
                map.put("h_title",title);
            }else {
                //原始标题
                map.put("h_title",map.get("title"));
            }
            list.add(map);
        }

        return ResponseResult.okResult(list);

    }
}