/// <summary>
/// Attempts to log in to the server.
/// Must be authenticated.
/// </summary>
/// <param name="displayName">Display name to log in with</param>
/// <param name="useServerDisplayName">Use the server's copy of the user's display name if it has one</param>
/// <param name="acceptingTrades">Whether to accept trades from other users</param>
public void SendLogin(string displayName, bool useServerDisplayName = false, bool acceptingTrades = true)
{
if (!authenticator.Authenticated)
{
return;
}
// Create and pack a new LoginPacket
LoginPacket packet = new LoginPacket
{
SessionId = authenticator.SessionId,
DisplayName = displayName,
UseServerDisplayName = useServerDisplayName,
AcceptingTrades = acceptingTrades
};
Any packedPacket = ProtobufPacketHelper.Pack(packet);
RaiseLogEntry(new LogEventArgs("Sending LoginPacket", LogLevel.DEBUG));
// Send it on its way
netClient.Send(MODULE_NAME, packedPacket.ToByteArray());
}
/// <summary>
/// Handles incoming <see cref="LoginPacket"/>s, attempting to log in users.
/// </summary>
/// <param name="connectionId">Original connection ID</param>
/// <param name="packet">Incoming packet</param>
/// <exception cref="UserNoLongerExistsException">User no longer exists for some reason even though we just checked like a second ago</exception>
private void handleLoginPacket(string connectionId, LoginPacket packet)
{
// Make sure the client is authenticated
if (!authenticator.IsAuthenticated(connectionId, packet.SessionId))
{
RaiseLogEntry(new LogEventArgs(string.Format("Failed login attempt for session {0}: Invalid session", packet.SessionId)));
// Fail the login attempt due to an invalid session
sendFailedLoginResponsePacket(connectionId, LoginFailureReason.SessionId, "Session is not valid, it may have expired. Try reconnecting.");
// Stop here
return;
}
// Try get the username from their session
if (!authenticator.TryGetUsername(connectionId, packet.SessionId, out string username))
{
RaiseLogEntry(new LogEventArgs(string.Format("Failed login attempt for session {0}: Couldn't get username", packet.SessionId)));
// Fail the login attempt due to an invalid session/username
sendFailedLoginResponsePacket(connectionId, LoginFailureReason.InternalServerError, "Server failed to get the username associated with the session. Try reconnecting.");
// Stop here
return;
}
// Passed authentication checks, time to accept the login attempt
// Try to get the user by their username
if (TryGetUserUuid(username, out string uuid))
{
// Try to log them in
if (!TryLogIn(uuid))
{
// This shouldn't happen because we just got their UUID but ok.
throw new UserNoLongerExistsException(uuid);
}
}
else
{
// Otherwise create a new user
uuid = CreateUser(username, packet.DisplayName, true);
}
// Check if they want to use the display name stored on the server
string displayName = packet.DisplayName;
if (packet.UseServerDisplayName)
{
// Try to get the display name stored server-side
if (!TryGetDisplayName(uuid, out displayName))
{
// This should never happen because we just made sure that the user existed no more than 30 lines ago, but just in case...
throw new UserNoLongerExistsException(uuid);
}
}
else
{
// Check the length of their username without markup
if (TextHelper.StripRichText(packet.DisplayName).Length > maxDisplayNameLength)
{
// Fail the login attempt due to display name length
sendFailedLoginResponsePacket(connectionId, LoginFailureReason.DisplayName, "Display name is too long.");
// Stop here
return;
}
// Update the user's display name on the server with the one they've provided
UpdateUser(uuid, TextHelper.SanitiseRichText(packet.DisplayName));
}
// Set whether they are accepting trades
UpdateUser(uuid, acceptingTrades: packet.AcceptingTrades);
// Add their UUID/Session ID pair to connectedUsers
lock (connectedUsersLock)
{
// Remove an existing session, if it exists
connectedUsers.Remove(connectionId);
// Add this session with the freshly-logged in UUID
connectedUsers.Add(connectionId, uuid);
}
// Log the event
RaiseLogEntry(new LogEventArgs(string.Format("User {0} successfully logged in as \"{1}\" (SessionID: {2}, UUID: {3})", username, displayName, packet.SessionId, uuid)));
// Send a successful login response
sendSuccessfulLoginResponsePacket(connectionId, uuid, displayName);
// Send a sync packet with the current user list
sendSyncPacket(connectionId);
// Raise the OnLogin event
OnLogin?.Invoke(this, new ServerLoginEventArgs(connectionId, uuid));
}