public void SendMsg(MsgDOT msgDto)
{
using (var db = new ChatServiceContext())
{
var _user = db.Users.FirstOrDefault(a => a.UserName == msgDto.ToName);
if (_user != null)
{
var _msg = new ChatMessage();
_msg.From = db.Users.First(a => a.UserName == msgDto.FromName).UserId;
_msg.To = _user.UserId;
_msg.Message = msgDto.Message;
_msg.MessageState = (int)MessageState.newMessage;
_msg.SendTime = DateTime.Now;
db.ChatMessages.Add(_msg);
db.SaveChanges();
msgDto.MessageId = _msg.MessageId;
msgDto.Time = _msg.SendTime;
syncSelf(msgDto);
PushMsg(msgDto);
}
else
{
string _errorMsg = string.Format("消息“{0}”发送失败：未找到 {1} 。", msgDto.Message, msgDto.ToName);
Clients.Caller.sysMsg(_errorMsg);
if (log.IsErrorEnabled)
{
log.Error(_errorMsg);
}
}
}
}
/// <summary>
/// 发信人其他客户端推送消息
/// </summary>
/// <param name="msgDto"><see cref="MsgDOT"/></param>
private void syncSelf(MsgDOT msgDto)
{
var fromIds = onlineUsers.First(a => a.UserName == msgDto.FromName).Connections.Select(a => a.ConnectionId).ToList();
fromIds.Remove(Context.ConnectionId);
if (fromIds.Any())
{
Clients.Clients(fromIds).showMsg(msgDto);
}
}
/// <summary>
/// 推送消息
/// </summary>
/// <param name="msgDto"><see cref="MsgDOT"/></param>
private void PushMsg(MsgDOT msgDto)
{
//发送消息
var _user = onlineUsers.FirstOrDefault(a => a.UserName == msgDto.ToName);
if (_user != null)
{
var toIds = _user.Connections.Select(a => a.ConnectionId).ToList();
if (toIds.Any())
{
Clients.Clients(toIds).pushMsg(msgDto);
}
else
{
Clients.Caller.sysMsg(string.Format("对方已离线，消息会暂时存储到服务器，TA下次上线会看到 。"));
}
}
else
{
Clients.Caller.sysMsg(string.Format("对方已离线，消息会暂时存储到服务器，TA下次上线会看到 。"));
}
}