jsonreplace

jsonreplace

This package provides a JSON utility function for replacing values in JSON.

Overview

This package provides a JSON utility function for replacing values in JSON. It is enabled to replace JSON valuse on matched JSON Schema.

package main

import (
	"encoding/json"
	"log"
	"os"
	"strconv"
	"strings"

	"github.com/mashiike/jsonreplace"
)

func main() {
	v := map[string]string{
		"name": "foo",
		"age":  "30",
	}
	enc := jsonreplace.NewEncoder(os.Stdout)
	mux := jsonreplace.NewReplaceMux()
	mux.ReplaceFunc(`{"type":"string"}`, func(raw json.RawMessage) (json.RawMessage, error) {
		str := strings.Trim(string(raw), `"`)
		num, err := strconv.ParseInt(str, 10, 64)
		if err != nil {
			return raw, nil
		}
		return json.Marshal(num)
	})
	enc.SetReplacer(mux)
	if err := enc.Encode(v); err != nil {
		log.Fatal(err)
	}
	// Output:
	// {"age":30,"name":"foo"}
}

this example replace string value to number value in JSON.

Advance Usage: DefaltReplaceMux

package main

import (
	"encoding/json"
	"fmt"
	"log"

	"github.com/mashiike/jsonreplace"
)

type Person struct {
	Email string `json:"email"`
	Name  string `json:"name"`
	Age   int    `json:"age"`
}

type Organization struct {
	Leader  Person   `json:"leader"`
	Members []Person `json:"members"`
}

func main() {
	org := Organization{
		Leader: Person{
			Email: "admin@example.com",
			Name:  "Tarou Yamada",
			Age:   30,
		},
		Members: []Person{
			{
				Email: "member1@example.com",
				Name:  "Hanako Tanaka",
				Age:   20,
			},
			{
				Email: "member2@exampl.com",
				Name:  "Jhon Smith",
				Age:   25,
			},
		},
	}
	jsonreplace.ReplaceFunc(`{"type":"object","properties":{"age":{"type":"integer"}},"required":["age"]}`, func(raw json.RawMessage) (json.RawMessage, error) {
		var v map[string]interface{}
		if err := json.Unmarshal(raw, &v); err != nil {
			return nil, err
		}
		if num, ok := v["age"].(float64); ok {
			num -= 5
			if num < 20 {
				num = 20
			}
			v["age"] = num
		}
		return json.Marshal(v)
	})
	jsonreplace.ReplaceFunc(`{"type":"string","format":"email"}`, func(raw json.RawMessage) (json.RawMessage, error) {
		return json.RawMessage(`"***********@example.com"`), nil
	})
	bs, err := jsonreplace.MarshalIndent(org, nil, "", "  ")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(string(bs))
	// Output:
	// {
	//   "leader": {
	//     "email": "***********@example.com",
	//     "name": "Tarou Yamada",
	//     "age": 25
	//   },
	//   "members": [
	//     {
	//       "email": "***********@example.com",
	//       "name": "Hanako Tanaka",
	//       "age": 20
	//     },
	//     {
	//       "email": "***********@example.com",
	//       "name": "Jhon Smith",
	//       "age": 20
	//     }
	//   ]
	// }
}

this example replace email address and age value in JSON. email address masked by ***********@example.com and age value is decreased by 5 and minimum value is 20.

Installation

go get github.com/mashiike/slogutils

License

This project is licensed under the MIT License - see the LICENSE(./LICENCE) file for details.

Contribution

Contributions, bug reports, and feature requests are welcome. Pull requests are also highly appreciated. For more details, please