nws/protocol/message.go

package protocol

import (
	"encoding/json"
	"github.com/google/uuid"
)

type MessageType string

var (
	MessageTypeSocks5     = MessageType("SOCKS5")
	MessageConnect        = MessageType("CONNECT")
	MessageConnectReverse = MessageType("CONNECTR")
)

type Message struct {
	Key         uuid.UUID   `json:"key,omitempty"`
	Type        MessageType `json:"type,omitempty"`
	Data        []byte      `json:"data,omitempty"`
	Destination string      `json:"destination,omitempty"`
}

type MessageOption func(*Message)

func WithUUID(uuid uuid.UUID) MessageOption {
	return func(m *Message) {
		m.Key = uuid
	}
}

func WithType(messageType MessageType) MessageOption {
	return func(m *Message) {
		m.Type = messageType
	}
}
func WithDestination(destination string) MessageOption {
	return func(m *Message) {
		m.Destination = destination
	}
}
func WithData(data []byte) MessageOption {
	return func(m *Message) {
		m.Data = data
	}
}

func NewMessage(configs ...MessageOption) *Message {
	m := &Message{}
	for _, config := range configs {
		config(m)
	}
	return m
}
func MarshalJSON(m *Message) ([]byte, error) {
	return json.Marshal(m)
}

func UnmarshalJSON(data []byte) (*Message, error) {
	m := NewMessage()
	if err := json.Unmarshal(data, &m); err != nil {
		return nil, err
	}
	return m, nil
}