getPopularSearches.js

getPopularSearches = value => {
    var headers = new Headers();
  //This the DSL query for searching according to given value
    const data = {
      "query": {
        "bool": {
          "must": [
            {
              "bool": {
                "must": {
                  "bool": {
                    "should": [
                      {
                        "multi_match": {
                          "query": value,
                          "fields": [
                            "key"
                          ],
                          "type": "best_fields",
                          "operator": "or",
                          "fuzziness": 0
                        }
                      },
                      {
                        "multi_match": {
                          "query": value,
                          "fields": [
                            "key"
                          ],
                          "type": "phrase_prefix",
                          "operator": "or"
                        }
                      }
                    ],
                    "minimum_should_match": "1"
                  }
                }
              }
            }
          ]
        }
      },
      "size": 20
    }


    headers.append('Authorization', 'Basic ' + btoa(USERNAME + ':' + PASSWORD));
    headers.append('Content-Type', 'application/json');

    fetch(ARC_CLUSTER_URL + "/.suggestions/_search",
      {
        method: 'POST',
        body: JSON.stringify(data),
        headers: headers
      }).then(res => res.json())
      .then(
        (result) => {
          console.log("result", result.hits.hits);
          var src = result.hits.hits
          var arr = [];
          for (var i = 0; i < src.length; i++) {
            arr.push(src[i]["_source"]["key"]);
          }
          
          //save the popular searches in the state
          this.setState({
            popular_searches: arr
          })
        },
        (error) => {
          console.log("Error is", error);
        }
      )
  }