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// Copyright 2012-2015 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
// A filter allowing to include hits that only fall within a polygon of points.
// For details, see:
// http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-geo-polygon-filter.html
type GeoPolygonFilter struct {
Filter
name string
points []*GeoPoint
cache *bool
cacheKey string
filterName string
}
func NewGeoPolygonFilter(name string) GeoPolygonFilter {
f := GeoPolygonFilter{name: name, points: make([]*GeoPoint, 0)}
return f
}
func (f GeoPolygonFilter) Cache(cache bool) GeoPolygonFilter {
f.cache = &cache
return f
}
func (f GeoPolygonFilter) CacheKey(cacheKey string) GeoPolygonFilter {
f.cacheKey = cacheKey
return f
}
func (f GeoPolygonFilter) FilterName(filterName string) GeoPolygonFilter {
f.filterName = filterName
return f
}
func (f GeoPolygonFilter) AddPoint(point *GeoPoint) GeoPolygonFilter {
f.points = append(f.points, point)
return f
}
func (f GeoPolygonFilter) Source() interface{} {
// "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[f.name] = polygon
points := make([]interface{}, 0)
for _, point := range f.points {
points = append(points, point.Source())
}
polygon["points"] = points
if f.filterName != "" {
params["_name"] = f.filterName
}
if f.cache != nil {
params["_cache"] = *f.cache
}
if f.cacheKey != "" {
params["_cache_key"] = f.cacheKey
}
return source
}
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