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// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
// GeoPolygonQuery allows to include hits that only fall within a polygon of points.
//
// For more details, see:
// https://www.elastic.co/guide/en/elasticsearch/reference/5.2/query-dsl-geo-polygon-query.html
type GeoPolygonQuery struct {
name string
points []*GeoPoint
queryName string
}
// NewGeoPolygonQuery creates and initializes a new GeoPolygonQuery.
func NewGeoPolygonQuery(name string) *GeoPolygonQuery {
return &GeoPolygonQuery{
name: name,
points: make([]*GeoPoint, 0),
}
}
// AddPoint adds a point from latitude and longitude.
func (q *GeoPolygonQuery) AddPoint(lat, lon float64) *GeoPolygonQuery {
q.points = append(q.points, GeoPointFromLatLon(lat, lon))
return q
}
// AddGeoPoint adds a GeoPoint.
func (q *GeoPolygonQuery) AddGeoPoint(point *GeoPoint) *GeoPolygonQuery {
q.points = append(q.points, point)
return q
}
func (q *GeoPolygonQuery) QueryName(queryName string) *GeoPolygonQuery {
q.queryName = queryName
return q
}
// Source returns JSON for the function score query.
func (q *GeoPolygonQuery) Source() (interface{}, error) {
// "geo_polygon" : {
// "person.location" : {
// "points" : [
// {"lat" : 40, "lon" : -70},
// {"lat" : 30, "lon" : -80},
// {"lat" : 20, "lon" : -90}
// ]
// }
// }
source := make(map[string]interface{})
params := make(map[string]interface{})
source["geo_polygon"] = params
polygon := make(map[string]interface{})
params[q.name] = polygon
var points []interface{}
for _, point := range q.points {
points = append(points, point.Source())
}
polygon["points"] = points
if q.queryName != "" {
params["_name"] = q.queryName
}
return source, nil
}
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