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// Copyright (c) 2019 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package query
import (
"encoding/json"
"fmt"
"github.com/blevesearch/bleve/geo"
"github.com/blevesearch/bleve/index"
"github.com/blevesearch/bleve/mapping"
"github.com/blevesearch/bleve/search"
"github.com/blevesearch/bleve/search/searcher"
)
type GeoBoundingPolygonQuery struct {
Points []geo.Point `json:"polygon_points"`
FieldVal string `json:"field,omitempty"`
BoostVal *Boost `json:"boost,omitempty"`
}
func NewGeoBoundingPolygonQuery(points []geo.Point) *GeoBoundingPolygonQuery {
return &GeoBoundingPolygonQuery{
Points: points}
}
func (q *GeoBoundingPolygonQuery) SetBoost(b float64) {
boost := Boost(b)
q.BoostVal = &boost
}
func (q *GeoBoundingPolygonQuery) Boost() float64 {
return q.BoostVal.Value()
}
func (q *GeoBoundingPolygonQuery) SetField(f string) {
q.FieldVal = f
}
func (q *GeoBoundingPolygonQuery) Field() string {
return q.FieldVal
}
func (q *GeoBoundingPolygonQuery) Searcher(i index.IndexReader,
m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
field := q.FieldVal
if q.FieldVal == "" {
field = m.DefaultSearchField()
}
return searcher.NewGeoBoundedPolygonSearcher(i, q.Points, field, q.BoostVal.Value(), options)
}
func (q *GeoBoundingPolygonQuery) Validate() error {
return nil
}
func (q *GeoBoundingPolygonQuery) UnmarshalJSON(data []byte) error {
tmp := struct {
Points []interface{} `json:"polygon_points"`
FieldVal string `json:"field,omitempty"`
BoostVal *Boost `json:"boost,omitempty"`
}{}
err := json.Unmarshal(data, &tmp)
if err != nil {
return err
}
q.Points = make([]geo.Point, 0, len(tmp.Points))
for _, i := range tmp.Points {
// now use our generic point parsing code from the geo package
lon, lat, found := geo.ExtractGeoPoint(i)
if !found {
return fmt.Errorf("geo polygon point: %v is not in a valid format", i)
}
q.Points = append(q.Points, geo.Point{Lon: lon, Lat: lat})
}
q.FieldVal = tmp.FieldVal
q.BoostVal = tmp.BoostVal
return nil
}
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