157 lines
3.9 KiB
Go
157 lines
3.9 KiB
Go
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// Copyright 2012-present Oliver Eilhard. All rights reserved.
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// Use of this source code is governed by a MIT-license.
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// See http://olivere.mit-license.org/license.txt for details.
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package elastic
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// WeightedAvgAggregation is a single-value metrics aggregation that
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// computes the weighted average of numeric values that are extracted
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// from the aggregated documents. These values can be extracted either
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// from specific numeric fields in the documents.
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//
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// See: https://www.elastic.co/guide/en/elasticsearch/reference/7.0/search-aggregations-metrics-weight-avg-aggregation.html
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type WeightedAvgAggregation struct {
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fields map[string]*MultiValuesSourceFieldConfig
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valueType string
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format string
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value *MultiValuesSourceFieldConfig
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weight *MultiValuesSourceFieldConfig
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subAggregations map[string]Aggregation
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meta map[string]interface{}
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}
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func NewWeightedAvgAggregation() *WeightedAvgAggregation {
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return &WeightedAvgAggregation{
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fields: make(map[string]*MultiValuesSourceFieldConfig),
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subAggregations: make(map[string]Aggregation),
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}
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}
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func (a *WeightedAvgAggregation) Field(field string, config *MultiValuesSourceFieldConfig) *WeightedAvgAggregation {
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a.fields[field] = config
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return a
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}
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func (a *WeightedAvgAggregation) ValueType(valueType string) *WeightedAvgAggregation {
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a.valueType = valueType
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return a
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}
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func (a *WeightedAvgAggregation) Format(format string) *WeightedAvgAggregation {
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a.format = format
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return a
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}
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func (a *WeightedAvgAggregation) Value(value *MultiValuesSourceFieldConfig) *WeightedAvgAggregation {
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a.value = value
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return a
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}
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func (a *WeightedAvgAggregation) Weight(weight *MultiValuesSourceFieldConfig) *WeightedAvgAggregation {
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a.weight = weight
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return a
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}
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func (a *WeightedAvgAggregation) SubAggregation(name string, subAggregation Aggregation) *WeightedAvgAggregation {
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a.subAggregations[name] = subAggregation
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return a
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}
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// Meta sets the meta data to be included in the aggregation response.
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func (a *WeightedAvgAggregation) Meta(metaData map[string]interface{}) *WeightedAvgAggregation {
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a.meta = metaData
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return a
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}
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func (a *WeightedAvgAggregation) Source() (interface{}, error) {
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source := make(map[string]interface{})
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opts := make(map[string]interface{})
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source["weighted_avg"] = opts
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if len(a.fields) > 0 {
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f := make(map[string]interface{})
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for name, config := range a.fields {
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cfg, err := config.Source()
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if err != nil {
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return nil, err
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}
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f[name] = cfg
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}
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opts["fields"] = f
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}
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if v := a.format; v != "" {
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opts["format"] = v
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}
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if v := a.valueType; v != "" {
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opts["value_type"] = v
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}
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if v := a.value; v != nil {
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cfg, err := v.Source()
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if err != nil {
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return nil, err
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}
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opts["value"] = cfg
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}
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if v := a.weight; v != nil {
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cfg, err := v.Source()
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if err != nil {
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return nil, err
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}
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opts["weight"] = cfg
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}
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// AggregationBuilder (SubAggregations)
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if len(a.subAggregations) > 0 {
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aggsMap := make(map[string]interface{})
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source["aggregations"] = aggsMap
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for name, aggregate := range a.subAggregations {
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src, err := aggregate.Source()
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if err != nil {
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return nil, err
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}
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aggsMap[name] = src
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}
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}
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// Add Meta data if available
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if len(a.meta) > 0 {
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source["meta"] = a.meta
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}
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return source, nil
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}
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// MultiValuesSourceFieldConfig represents a field configuration
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// used e.g. in WeightedAvgAggregation.
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type MultiValuesSourceFieldConfig struct {
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FieldName string
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Missing interface{}
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Script *Script
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TimeZone string
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}
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func (f *MultiValuesSourceFieldConfig) Source() (interface{}, error) {
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source := make(map[string]interface{})
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if v := f.Missing; v != nil {
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source["missing"] = v
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}
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if v := f.Script; v != nil {
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src, err := v.Source()
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if err != nil {
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return nil, err
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}
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source["script"] = src
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}
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if v := f.FieldName; v != "" {
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source["field"] = v
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}
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if v := f.TimeZone; v != "" {
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source["time_zone"] = v
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}
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return source, nil
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}
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