golang ソケットを使用して 1 対 1 でチャットする

type client struct {
    conn           *websocket.conn
    chatrepository chat.chatrepository
    message        chan *message
    id             string `json:"id"`
    reference      string `json:"reference"`
    username       string `json:"username"`
    sender         string `json:"sender"`
    recipient      string `json:"recipient"`
}

type message struct {
    content   string `json:"content"`
    reference string `json:"reference"`
    // username  string `json:"username"`
    sender string `json:"sender"`
}

func (c *client) writemessage() {
    defer func() {
        c.conn.close()
    }()

    for {
        message, ok := <-c.message
        if !ok {
            return
        }
        uuid, err := uuid.newv4()
        if err != nil {
            log.fatalf("failed to generate uuid: %v", err)
        }
        chatmessage := chat.chatmessage{
            id:     uuid.string(),
            sender: message.sender,
            // recipient: recipient,
            timestamp: time.now(),
            content:   message.content,
        }
        if c.sender == message.sender {
            _, errx := c.chatrepository.addmessage(message.reference, chatmessage)
            if err != nil {
                log.fatalf("failed to generate uuid: %v", errx)
            }
        }
        c.conn.writejson(chatmessage)
    }
}

func (c *client) readmessage(hub *hub) {
    defer func() {
        hub.unregister <- c
        c.conn.close()
    }()

    for {
        _, m, err := c.conn.readmessage()
        if err != nil {
            if websocket.isunexpectedcloseerror(err, websocket.closegoingaway, websocket.closeabnormalclosure) {
                log.printf("error: %v", err)
            }
            break
        }

        msg := &message{
            content:   string(m),
            reference: c.reference,
            sender:    c.sender,
            // username:  c.username,
        }

        hub.broadcast <- msg
    }
}