private ISet <string> Broadcast(string msg)
{
ISet <string> online = new HashSet <string>();
foreach (var entry in WebSocketMiddleware._sockets)
{
if (!entry.Key.Equals(UserName))
{
online.Add(entry.Key);
WebSocketMiddleware.SendStringAsync(entry.Value, msg);
}
}
return(online);
}
private void HandleChatResponseMsg(ChatRequestResponse resp, TalkBackDBContext dbContext)
{
// first check that the addressee is in the dictionary:
WebSocket peer;
if (!WebSocketMiddleware._sockets.TryGetValue(resp.To, out peer))
{
// not found -- ignore
return;
}
string strMsg = resp.ToXml().ToString();
WebSocketMiddleware.SendStringAsync(peer, strMsg);
return;
}
private void HandleLoginMsg(Login login, TalkBackDBContext dbContext)
{
UsersRepository repo = new UsersRepository(dbContext);
// check if User Exists:
if (repo.IsUserExist(login.Name))
{
// check password:
if (!repo.IsPasswordCorrect(login.Name, login.Password))
{
LoginResponse response = new LoginResponse {
Success = false, ErrorMessage = "Wrong password, please try again"
};
WebSocketMiddleware.SendStringAsync(_webSocket, response.ToXml().ToString());
return;
}
}
else
{
// new user: add it to repo
repo.AddNewUser(new UserModel {
Name = login.Name, Password = login.Password
});
}
// login successfully:
// 1. record UserName for this handler
UserName = login.Name;
// 2. add to the websocket dictionary
WebSocketMiddleware._sockets.TryAdd(UserName, _webSocket);
// 3. inform all online users about the new/updated contact,
// create a Set<string> of online users:
ISet <string> online = new HashSet <string>();
Contact me = new Contact {
Name = UserName, IsOnline = true
};
string contactUpdate = me.ToXml().ToString();
online = Broadcast(contactUpdate);
// 4. send the client the list of contacts:
IList <AbstractXmlSerializable> contacts = repo.GetContactsList(UserName, online);
string contactsList = ModelXmlMapper.GetAsXmlString(contacts);
WebSocketMiddleware.SendStringAsync(_webSocket, contactsList);
}
private void HandleChatMessageMsg(MessageModel msg, TalkBackDBContext dbContext)
{
// first check that the addressee is in the dictionary:
WebSocket peer;
if (!WebSocketMiddleware._sockets.TryGetValue(msg.To, out peer))
{
// not found -> send a ChatRequestResponse with failure:
ChatRequestResponse resp = new ChatRequestResponse {
Success = false, ErrorMessage = "Chat peer is not online"
};
WebSocketMiddleware.SendStringAsync(_webSocket, resp.ToXml().ToString());
return;
}
// save message in the log:
Message dbMessage = new Message
{
Content = msg.Content,
ReceiverName = msg.To,
SenderName = msg.From,
Time = DateTime.Now
};
try
{
dbContext.Message.Add(dbMessage);
dbContext.SaveChanges();
}
catch (Exception ex)
{
//do nothing
}
// send the message to both sender and receiver:
string strMsg = msg.ToXml().ToString();
WebSocketMiddleware.SendStringAsync(_webSocket, strMsg);
WebSocketMiddleware.SendStringAsync(peer, strMsg);
return;
}
private void HandleChatRequestMsg(ChatRequest req, TalkBackDBContext dbContext)
{
// first check that the addressee is in the dictionary:
WebSocket peer;
if (!WebSocketMiddleware._sockets.TryGetValue(req.To, out peer))
{
// not found -> send a ChatRequestResponse with failure:
ChatRequestResponse resp = new ChatRequestResponse {
Success = false, ErrorMessage = "Chat peer is not online"
};
WebSocketMiddleware.SendStringAsync(_webSocket, resp.ToXml().ToString());
return;
}
string strMsg = req.ToXml().ToString();
WebSocketMiddleware.SendStringAsync(peer, strMsg);
return;
}
