public override async Task OnDisconnectedAsync(Exception exception)
{
try
{
// get the group and username associated with this connectionid
GroupDetails.TryGetUsername(Context.ConnectionId, out string group, out string username);
try
{
// what if the owner drops?
if (!string.IsNullOrWhiteSpace(group) && GroupDetails.TryGetOwner(group, out string ownerconnectionid))
{
if (string.Equals(Context.ConnectionId, ownerconnectionid, StringComparison.OrdinalIgnoreCase))
{
// ugh - we cannot proceed
await SendMessage(group, "I left the game and no more rounds can be played (sorry)");
}
else
{
// notify that you left
await SendMessage(group, $"I left the game");
}
}
// clean up
GroupDetails.Purge(Context.ConnectionId);
// broadcast the updated group
if (!string.IsNullOrWhiteSpace(group))
{
await Clients.Group(group).SendAsync("ReceiveJoin", GetSortedUsers(GroupDetails.GetUsers(group)));
}
await base.OnDisconnectedAsync(exception);
}
catch (Exception e)
{
await Clients.Group(group).SendAsync("ReceiveMessage", $"failed to disconnect: {e.Message}");
}
}
catch (Exception e)
{
await Clients.All.SendAsync("ReceiveMessage", $"Catastrophic failure: {e.Message}");
}
}