private async Task <Group> AddToGroup(string groupName)
{
var group = await messageRepository.GetMessageGroup(groupName);
if (group == null)
{
group = new Group(groupName);
messageRepository.AddGroup(group);
}
var connection = new Connection(Context.ConnectionId, Context.User.GetUsername());
group.Connections.Add(connection);
if (await messageRepository.SaveAllAsync())
{
return(group);
}
throw new HubException("Failed to join group");
}
