package encoder

import (
	"encoding/json"
	"fmt"
	"google.golang.org/protobuf/proto"
)

type Encoder interface {
	Encode(v interface{}) ([]byte, error)
}

type JsonEncoder struct{}
type ProtoEncoder struct{}

var JsonEncoderInstance = &JsonEncoder{}
var ProtoEncoderInstance = &ProtoEncoder{}

func (j *JsonEncoder) Encode(v interface{}) ([]byte, error) {
	return json.Marshal(v)
}

func (p *ProtoEncoder) Encode(v interface{}) ([]byte, error) {
	if message, ok := v.(proto.Message); ok {
		return proto.Marshal(message)
	}
	return nil, fmt.Errorf("not a proto message")
}