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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
import (
"time"
)
// RangeAggregation is a multi-bucket value source based aggregation that
// enables the user to define a set of ranges - each representing a bucket.
// During the aggregation process, the values extracted from each document
// will be checked against each bucket range and "bucket" the
// relevant/matching document. Note that this aggregration includes the
// from value and excludes the to value for each range.
// See: https://www.elastic.co/guide/en/elasticsearch/reference/6.0/search-aggregations-bucket-range-aggregation.html
type RangeAggregation struct {
field string
script *Script
missing interface{}
subAggregations map[string]Aggregation
meta map[string]interface{}
keyed *bool
unmapped *bool
entries []rangeAggregationEntry
}
type rangeAggregationEntry struct {
Key string
From interface{}
To interface{}
}
func NewRangeAggregation() *RangeAggregation {
return &RangeAggregation{
subAggregations: make(map[string]Aggregation),
entries: make([]rangeAggregationEntry, 0),
}
}
func (a *RangeAggregation) Field(field string) *RangeAggregation {
a.field = field
return a
}
func (a *RangeAggregation) Script(script *Script) *RangeAggregation {
a.script = script
return a
}
// Missing configures the value to use when documents miss a value.
func (a *RangeAggregation) Missing(missing interface{}) *RangeAggregation {
a.missing = missing
return a
}
func (a *RangeAggregation) SubAggregation(name string, subAggregation Aggregation) *RangeAggregation {
a.subAggregations[name] = subAggregation
return a
}
// Meta sets the meta data to be included in the aggregation response.
func (a *RangeAggregation) Meta(metaData map[string]interface{}) *RangeAggregation {
a.meta = metaData
return a
}
func (a *RangeAggregation) Keyed(keyed bool) *RangeAggregation {
a.keyed = &keyed
return a
}
func (a *RangeAggregation) Unmapped(unmapped bool) *RangeAggregation {
a.unmapped = &unmapped
return a
}
func (a *RangeAggregation) AddRange(from, to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{From: from, To: to})
return a
}
func (a *RangeAggregation) AddRangeWithKey(key string, from, to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{Key: key, From: from, To: to})
return a
}
func (a *RangeAggregation) AddUnboundedTo(from interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{From: from, To: nil})
return a
}
func (a *RangeAggregation) AddUnboundedToWithKey(key string, from interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{Key: key, From: from, To: nil})
return a
}
func (a *RangeAggregation) AddUnboundedFrom(to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{From: nil, To: to})
return a
}
func (a *RangeAggregation) AddUnboundedFromWithKey(key string, to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{Key: key, From: nil, To: to})
return a
}
func (a *RangeAggregation) Lt(to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{From: nil, To: to})
return a
}
func (a *RangeAggregation) LtWithKey(key string, to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{Key: key, From: nil, To: to})
return a
}
func (a *RangeAggregation) Between(from, to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{From: from, To: to})
return a
}
func (a *RangeAggregation) BetweenWithKey(key string, from, to interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{Key: key, From: from, To: to})
return a
}
func (a *RangeAggregation) Gt(from interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{From: from, To: nil})
return a
}
func (a *RangeAggregation) GtWithKey(key string, from interface{}) *RangeAggregation {
a.entries = append(a.entries, rangeAggregationEntry{Key: key, From: from, To: nil})
return a
}
func (a *RangeAggregation) Source() (interface{}, error) {
// Example:
// {
// "aggs" : {
// "price_ranges" : {
// "range" : {
// "field" : "price",
// "ranges" : [
// { "to" : 50 },
// { "from" : 50, "to" : 100 },
// { "from" : 100 }
// ]
// }
// }
// }
// }
//
// This method returns only the { "range" : { ... } } part.
source := make(map[string]interface{})
opts := make(map[string]interface{})
source["range"] = opts
// ValuesSourceAggregationBuilder
if a.field != "" {
opts["field"] = a.field
}
if a.script != nil {
src, err := a.script.Source()
if err != nil {
return nil, err
}
opts["script"] = src
}
if a.missing != nil {
opts["missing"] = a.missing
}
if a.keyed != nil {
opts["keyed"] = *a.keyed
}
if a.unmapped != nil {
opts["unmapped"] = *a.unmapped
}
var ranges []interface{}
for _, ent := range a.entries {
r := make(map[string]interface{})
if ent.Key != "" {
r["key"] = ent.Key
}
if ent.From != nil {
switch from := ent.From.(type) {
case int, int16, int32, int64, float32, float64:
r["from"] = from
case *int, *int16, *int32, *int64, *float32, *float64:
r["from"] = from
case time.Time:
r["from"] = from.Format(time.RFC3339)
case *time.Time:
r["from"] = from.Format(time.RFC3339)
case string:
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 *int, *int16, *int32, *int64, *float32, *float64:
r["to"] = to
case time.Time:
r["to"] = to.Format(time.RFC3339)
case *time.Time:
r["to"] = to.Format(time.RFC3339)
case string:
r["to"] = to
case *string:
r["to"] = to
}
}
ranges = append(ranges, r)
}
opts["ranges"] = ranges
// AggregationBuilder (SubAggregations)
if len(a.subAggregations) > 0 {
aggsMap := make(map[string]interface{})
source["aggregations"] = aggsMap
for name, aggregate := range a.subAggregations {
src, err := aggregate.Source()
if err != nil {
return nil, err
}
aggsMap[name] = src
}
}
// Add Meta data if available
if len(a.meta) > 0 {
source["meta"] = a.meta
}
return source, nil
}
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