急！ 实现动态多条件下日志查询 自带discover不够详细

想实现动态多条件下日志查询的功能  
我之前只写过固定匹配的字段，
比如之前查询某用户在某时间段的日志，这样data就只要传三个固定字段，user ，startDate，endDate
现在情况是查询条件变多，比如用户名，系统名，时间段，日志类型。 且不是每个条件都是必须填写，
所以我在server.route里写request.payload.start  request.payload.app等等把位置提前占好也没用的。

server.route({

    path: "/log-monitor/backdate",

    method: "POST",

    config: {

      payload: {

        output: "data",

        parse: true,

        allow: "application/json"

      }

    },

    handler(request, reply) {

      console.log(request.payload);

      const { callWithRequest } = server.plugins.elasticsearch.getCluster(

        "data"

      );

      callWithRequest(request, "search", {

        index: " logstash-*",

        body: {

          query: {

            bool: {  

              must:[

                {match: { user: request.payload.user }},

                {match: { app: request.payload.app }}

              ],

              filter: {

                range: {

                  "@timestamp": {

                    gte: request.payload.start,

                    lte: request.payload.end

                  }

                }

              }

            }

          },

          from: request.payload.currentPage,

          size:25,

          sort: [{ "@timestamp": "desc" }]

        }

      }).then(response => {

        reply(response);

      });

    }

  });

var data = {

        user: $scope.userName,

        start: startDate($scope.dateRangeStart),

        end: endDate($scope.dateRangeEnd),

        app:$scope.app,

        level:$scope.level,

      };

      console.log(data)

        $http.post(url, data).success(function(req) {

        console.log(req)

        })