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v2fly/infra/conf/merge/merge.go

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// Copyright 2020 Jebbs. All rights reserved.
// Use of this source code is governed by MIT
// license that can be found in the LICENSE file.
/*
2021-12-26 23:33:08 -05:00
Package merge provides the capability to merge multiple
JSON files or contents into one output.
Merge Rules:
- Simple values (string, number, boolean) are overwritten, others are merged
- Elements with same "tag" (or "_tag") in an array will be merged
- Add "_priority" property to array elements will help sort the
*/
package merge
import (
"bytes"
"encoding/json"
"github.com/v2fly/v2ray-core/v5/infra/conf/serial"
)
// JSONs merges multiple json contents into one json.
func JSONs(args [][]byte) ([]byte, error) {
m := make(map[string]interface{})
for _, arg := range args {
if _, err := ToMap(arg, m); err != nil {
return nil, err
}
}
return FromMap(m)
}
// ToMap merges json content to target map and returns it
func ToMap(content []byte, target map[string]interface{}) (map[string]interface{}, error) {
if target == nil {
target = make(map[string]interface{})
}
r := bytes.NewReader(content)
n := make(map[string]interface{})
err := serial.DecodeJSON(r, &n)
if err != nil {
return nil, err
}
if err = mergeMaps(target, n); err != nil {
return nil, err
}
return target, nil
}
// FromMap apply merge rules to map and convert it to json
func FromMap(target map[string]interface{}) ([]byte, error) {
if target == nil {
target = make(map[string]interface{})
}
err := ApplyRules(target)
if err != nil {
return nil, err
}
return json.Marshal(target)
}