/// <summary>
/// 是否存在用户
/// </summary>
/// <param name="info"></param>
/// <returns></returns>
public bool IsExistUser(ChatUserInfo info)
{
foreach (ChatUserInfo item in UserList)
{
if (info.Name == item.Name && info.ID == item.ID)
{
return(true);
}
}
return(false);
}
/// <summary>
/// 供客户端调用的【通知用户在线】方法
/// </summary>
/// <param name="message"></param>
public void SendOnLine(Message msg)
{
var userInfo = new ChatUserInfo()
{
ID = msg.UserID, Name = msg.Name
};
userInfo.TimeOutEvent += () =>
{
//用户20s无心跳包应答，则视为掉线，会抛出事件，这里会接住，然后处理用户掉线动作。
SendOffLine(msg);
};
if (!IsExistUser(userInfo))
{
UserList.Add(userInfo);
}
_chatHandler.Clients.All.onLine(UserList);
SendMessage(new Message()
{
UserID = msg.UserID, Name = msg.Name, Content = ""
});
}