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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
// The geo_distance facet is a facet providing information for ranges of
// distances from a provided geo_point including count of the number of hits
// that fall within each range, and aggregation information (like total).
// See: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-facets-geo-distance-facet.html
type GeoDistanceFacet struct {
facetFilter Filter
global *bool
nested string
mode string
fieldName string
valueFieldName string
lat float64
lon float64
geoHash string
geoDistance string
unit string
params map[string]interface{}
valueScript string
lang string
entries []geoDistanceFacetEntry
}
func NewGeoDistanceFacet() GeoDistanceFacet {
return GeoDistanceFacet{
params: make(map[string]interface{}),
entries: make([]geoDistanceFacetEntry, 0),
}
}
func (f GeoDistanceFacet) FacetFilter(filter Facet) GeoDistanceFacet {
f.facetFilter = filter
return f
}
func (f GeoDistanceFacet) Global(global bool) GeoDistanceFacet {
f.global = &global
return f
}
func (f GeoDistanceFacet) Nested(nested string) GeoDistanceFacet {
f.nested = nested
return f
}
func (f GeoDistanceFacet) Mode(mode string) GeoDistanceFacet {
f.mode = mode
return f
}
func (f GeoDistanceFacet) Field(fieldName string) GeoDistanceFacet {
f.fieldName = fieldName
return f
}
func (f GeoDistanceFacet) ValueField(valueFieldName string) GeoDistanceFacet {
f.valueFieldName = valueFieldName
return f
}
func (f GeoDistanceFacet) ValueScript(valueScript string) GeoDistanceFacet {
f.valueScript = valueScript
return f
}
func (f GeoDistanceFacet) Lang(lang string) GeoDistanceFacet {
f.lang = lang
return f
}
func (f GeoDistanceFacet) ScriptParam(name string, value interface{}) GeoDistanceFacet {
f.params[name] = value
return f
}
func (f GeoDistanceFacet) Point(lat, lon float64) GeoDistanceFacet {
f.lat = lat
f.lon = lon
return f
}
func (f GeoDistanceFacet) Lat(lat float64) GeoDistanceFacet {
f.lat = lat
return f
}
func (f GeoDistanceFacet) Lon(lon float64) GeoDistanceFacet {
f.lon = lon
return f
}
func (f GeoDistanceFacet) GeoHash(geoHash string) GeoDistanceFacet {
f.geoHash = geoHash
return f
}
func (f GeoDistanceFacet) GeoDistance(geoDistance string) GeoDistanceFacet {
f.geoDistance = geoDistance
return f
}
func (f GeoDistanceFacet) AddRange(from, to float64) GeoDistanceFacet {
f.entries = append(f.entries, geoDistanceFacetEntry{From: from, To: to})
return f
}
func (f GeoDistanceFacet) AddUnboundedTo(from float64) GeoDistanceFacet {
f.entries = append(f.entries, geoDistanceFacetEntry{From: from, To: nil})
return f
}
func (f GeoDistanceFacet) AddUnboundedFrom(to float64) GeoDistanceFacet {
f.entries = append(f.entries, geoDistanceFacetEntry{From: nil, To: to})
return f
}
func (f GeoDistanceFacet) Unit(distanceUnit string) GeoDistanceFacet {
f.unit = distanceUnit
return f
}
func (f GeoDistanceFacet) addFilterFacetAndGlobal(source map[string]interface{}) {
if f.facetFilter != nil {
source["facet_filter"] = f.facetFilter.Source()
}
if f.nested != "" {
source["nested"] = f.nested
}
if f.global != nil {
source["global"] = *f.global
}
if f.mode != "" {
source["mode"] = f.mode
}
}
func (f GeoDistanceFacet) Source() interface{} {
source := make(map[string]interface{})
f.addFilterFacetAndGlobal(source)
opts := make(map[string]interface{})
source["geo_distance"] = opts
if f.geoHash != "" {
opts[f.fieldName] = f.geoHash
} else {
opts[f.fieldName] = []float64{f.lat, f.lon}
}
if f.valueFieldName != "" {
opts["value_field"] = f.valueFieldName
}
if f.valueScript != "" {
opts["value_script"] = f.valueScript
if f.lang != "" {
opts["lang"] = f.lang
}
if len(f.params) > 0 {
opts["params"] = f.params
}
}
ranges := make([]interface{}, 0)
for _, ent := range f.entries {
r := make(map[string]interface{})
if ent.From != nil {
switch from := ent.From.(type) {
case int, int16, int32, int64, float32, float64:
r["from"] = from
case string:
r["from"] = from
}
}
if ent.To != nil {
switch to := ent.To.(type) {
case int, int16, int32, int64, float32, float64:
r["to"] = to
case string:
r["to"] = to
}
}
ranges = append(ranges, r)
}
opts["ranges"] = ranges
if f.unit != "" {
opts["unit"] = f.unit
}
if f.geoDistance != "" {
opts["distance_type"] = f.geoDistance
}
return source
}
type geoDistanceFacetEntry struct {
From interface{}
To interface{}
}
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