public ContactViewModel(User user, ContactViewModel parent)
{
User = user;
IsOnline = user.Online;
Status = user.Online ? "Online" : "Offline";
_parent = parent;
}
public ChatSessionViewModel StartNewSession(User contact, User initiator)
{
var viewModel = new ChatSessionViewModel(contact);
viewModel.Initiator = initiator;
viewModel.SendMessage += OnSendMessage;
viewModel.ChatSessionClosed += OnChatSessionClosed;
_chatSessions.Add(contact.Name, viewModel);
return viewModel;
}
public void AddMessage(Message message, User initiator)
{
ChatSessionViewModel chatSession;
if (!_chatSessions.TryGetValue(message.From.Name, out chatSession))
{
chatSession = StartNewSession(message.From, initiator);
chatSession.OpenChat();
}
chatSession.MessageReceived(message);
}
public ContactViewModel(User user)
{
User = user;
IsOnline = user.Online;
Status = user.Online ? "Online" : "Offline";
}
public ChatSessionEventArgs(User user, string message)
{
Contact = user;
Message = message;
}
public OpenChatEventArgs(User contact)
{
Contact = contact;
}
private void OnUserStatusChange(User user)
{
// Mark user as online/offline
if (Contacts != null)
{
var contact = Contacts.FirstOrDefault(u => u.User.Name == user.Name);
if (contact != null)
{
// For the contact list to register that the contact has changed status,
// have to remove and re-add the contact again
Contacts.Remove(contact);
}
Contacts.Add(new ContactViewModel(user, Me));
}
}
public ChatSessionViewModel(User user)
{
Contact = user;
Conversation = new ObservableCollection<Message>();
}