/// <summary>
/// This method is used to get user list from chat server.
/// It is called by server, once after user logged in to server.
/// </summary>
/// <param name="users">All online user informations</param>
public void GetUserList(UserInfo[] users)
{
foreach (var user in users)
{
_chatRoom.AddUserToList(user);
}
}
/// <summary>
/// Used to login to chat service.
/// </summary>
/// <param name="userInfo">User informations</param>
public void Login(UserInfo userInfo)
{
//Check nick if it is being used by another user
if (FindClientByNick(userInfo.Nick) != null)
{
throw new NickInUseException("The nick '" + userInfo.Nick + "' is being used by another user. Please select another one.");
}
//Get a reference to the current client that is calling this method
var client = CurrentClient;
//Get a proxy object to call methods of client when needed
var clientProxy = client.GetClientProxy<IChatClient>();
//Create a ChatClient and store it in a collection
var chatClient = new ChatClient(client, clientProxy, userInfo);
_clients[client.ClientId] = chatClient;
//Register to Disconnected event to know when user connection is closed
client.Disconnected += Client_Disconnected;
//Start a new task to send user list to new user and to inform
//all users that a new user joined to room
Task.Factory.StartNew(
() =>
{
OnUserListChanged();
SendUserListToClient(chatClient);
SendUserLoginInfoToAllClients(userInfo);
});
}
/// <summary>
/// Creates a new ChatClient object.
/// </summary>
/// <param name="client">Scs client reference</param>
/// <param name="clientProxy">Proxy object to call remote methods of chat client</param>
/// <param name="userInfo">User informations of client</param>
public ChatClient(IScsServiceClient client, IChatClient clientProxy, UserInfo userInfo)
{
Client = client;
ClientProxy = clientProxy;
User = userInfo;
}
/// <summary>
/// This method is used to inform all online clients
/// that a new user joined to room.
/// </summary>
/// <param name="userInfo">New joined user's informations</param>
private void SendUserLoginInfoToAllClients(UserInfo userInfo)
{
foreach (var client in _clients.GetAllItems())
{
//Do not send informations to user that is logged in.
if (client.User.Nick == userInfo.Nick)
{
continue;
}
try
{
client.ClientProxy.OnUserLogin(userInfo);
}
catch
{
}
}
}
/// <summary>
/// Adds user to user list in right area of the window.
/// </summary>
/// <param name="userInfo">New user informations</param>
private void AddUserToListInternal(UserInfo userInfo)
{
//Do not add the current user (that is using the application) to user list
if (userInfo.Nick == CurrentUserInfo.Nick)
{
return;
}
//Do not add user to list if it is already exists.
if (FindUserInList(userInfo.Nick) != null)
{
return;
}
//Find correct order (by name) to insert the user
var orderedIndex = 0;
foreach (UserCardControl userCardControl in spUsers.Children)
{
if (userInfo.Nick.CompareTo(userCardControl.UserNick) < 0)
{
break;
}
orderedIndex++;
}
//Create user control
var userCard = new UserCardControl
{
UserNick = userInfo.Nick,
UserStatus = userInfo.Status,
AvatarBytes = userInfo.AvatarBytes,
Height = 60
};
userCard.MouseDoubleClick += UserCard_MouseDoubleClick;
//Insert user to user list
spUsers.Children.Insert(
orderedIndex,
userCard
);
//Enable private messaging window if any open with that user
if (_privateChatWindows.ContainsKey(userInfo.Nick))
{
_privateChatWindows[userInfo.Nick].UserLoggedIn();
_privateChatWindows[userInfo.Nick].RemoteUserStatus = userInfo.Status;
_privateChatWindows[userInfo.Nick].RemoteUserAvatar = userCard.AvatarImageSource;
}
}
/// <summary>
/// This methos is used to add a new user to user list in room view.
/// </summary>
/// <param name="userInfo">Informations of new user</param>
public void AddUserToList(UserInfo userInfo)
{
Dispatcher.Invoke(new Action(() => AddUserToListInternal(userInfo)));
}
/// <summary>
/// This method is called from chat server to inform that a new user
/// joined to chat room.
/// </summary>
/// <param name="userInfo">Informations of new user</param>
public void OnUserLogin(UserInfo userInfo)
{
_chatRoom.AddUserToList(userInfo);
}