//
// Summary:
// Attempts to accept a new connection for a given chat room. Can fail if the room is full, for example.
public async Task JoinChatRoom(string chatRoomName, string userName)
{
var userConnectionId = Context.ConnectionId;
_logger.LogInformation("A new user {userName:l} want to join room {chatRoomName:l} with connection id: {userConnectionId:l}",
userName, chatRoomName, userConnectionId);
try
{
_logger.LogInformation("Fetching chat room connection pool to see if it's full...");
await _chatRoomService.AddUserToChatRoomConnectionPool(chatRoomName, userName, userConnectionId);
}
catch (Exception e) when
(e is ObjectDoesNotExistException || e is ChatRoomIsFullException || e is UserIsAlreadyConnectedException)
{
throw new HubException(e.Message); // TODO: improve safety of the exception message with specific handler
}
_logger.LogInformation("Adding user to chat room group...");
await Groups.AddToGroupAsync(Context.ConnectionId, chatRoomName);
_logger.LogInformation("Adding connection...");
await base.OnConnectedAsync();
_logger.LogInformation("Broadcasting new user message to the room...");
await BroadcastSystemMessageToChatRoom($"A new user has joined the room: {userName}", chatRoomName);
}
