/
aggs_bucket_script.go
71 lines (63 loc) · 2.18 KB
/
aggs_bucket_script.go
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// Copyright (C) 2022 Sneller, Inc.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package elastic_proxy
import (
"errors"
"fmt"
"strings"
)
type aggsBucketScript struct {
BucketsPath map[string]string `json:"buckets_path"`
Script string `json:"script"`
}
func (f *aggsBucketScript) process(aggName string, data any) error {
bmr, ok := data.(*bucketMultiResult)
if !ok {
return errors.New("bucket sort can only be applied to a set of buckets")
}
// "parse" script
parts := strings.Split(f.Script, " ")
if len(parts) != 3 {
return fmt.Errorf("unsupported script %q", f.Script)
}
left := parts[0]
op := parts[1]
right := parts[2]
if !strings.HasPrefix(left, "params.") || !strings.HasPrefix(right, "params.") || op != "+" {
return fmt.Errorf("unsupported script %q", f.Script)
}
leftParam := left[7:]
rightParam := right[7:]
leftAggField, ok := f.BucketsPath[leftParam]
if !ok {
return fmt.Errorf("can't find param %q in script %q", leftParam, f.Script)
}
rightAggField, ok := f.BucketsPath[rightParam]
if !ok {
return fmt.Errorf("can't find param %q in script %q", rightParam, f.Script)
}
// TODO: Convert into an actual script execution
for _, bucket := range bmr.Buckets {
leftValue := 0
if leftAgg, ok := bucket.SubAggregations[leftAggField].(*metricResult); ok {
leftValue, _ = leftAgg.Value.(int)
}
rightValue := 0
if rightAgg, ok := bucket.SubAggregations[rightAggField].(*metricResult); ok {
rightValue, _ = rightAgg.Value.(int)
}
bucket.SubAggregations[aggName] = &metricResult{Value: leftValue + rightValue}
}
return nil
}