1 user.go

// 用户处理消息的业务
func (this *User) DoMessage(msg string) {
    if msg == "who" {
        // 查询当前在线用户
        this.server.mapLock.Lock()
        for userName, _ := range this.server.OnlineMap {
            this.SendMsg(userName + "在线\n")
        }
        this.server.mapLock.Unlock()
    } else if len(msg) > 7 && msg[:7] == "rename|" {
        // 更改自己的用户名, 消息格式: rename|张三
        newName := strings.Split(msg, "|")[1]
        // 判断name是否存在
        _, err := this.server.OnlineMap[newName]
        if err {
            this.SendMsg("失败, 该用户名已被其它人使用\n")
        } else {
            this.server.mapLock.Lock()
            delete(this.server.OnlineMap, this.Name)
            this.server.OnlineMap[newName] = this
            this.server.mapLock.Unlock()
            this.Name = newName
            this.SendMsg("您已成功更新为用户名:" + this.Name + "\n")
        }
    } else {
        this.server.BroadCast(this, msg)
    }
}