public Shard(GatewaySettings settings, ShardInfo info, IGatewayRatelimiter ratelimiter, string url, ILogger logger)
{
_jsonSerializerOptions = new JsonSerializerOptions().ConfigureForMyriad();
_settings = settings;
_info = info;
_ratelimiter = ratelimiter;
_url = url;
_logger = logger.ForContext <Shard>().ForContext("ShardId", info.ShardId);
_stateManager = new ShardStateManager(info, _jsonSerializerOptions, logger)
{
HandleEvent = HandleEvent,
SendHeartbeat = SendHeartbeat,
SendIdentify = SendIdentify,
SendResume = SendResume,
Connect = ConnectInner,
Reconnect = Reconnect,
};
_stateManager.OnHeartbeatReceived += latency =>
{
HeartbeatReceived?.Invoke(latency);
};
_conn = new ShardConnection(_jsonSerializerOptions, _logger);
}
private async Task <bool> TickHeartbeat(ShardConnection conn)
{
// If we don't need to heartbeat, do nothing
if (_lastHeartbeatSent == null || _currentHeartbeatInterval == null)
{
return(true);
}
if (DateTimeOffset.UtcNow - _lastHeartbeatSent < _currentHeartbeatInterval)
{
return(true);
}
// If we haven't received the ack in time, close w/ error
if (!_hasReceivedAck)
{
_logger.Warning(
"Shard {ShardId}: Did not receive heartbeat Ack from gateway within interval ({HeartbeatInterval})",
ShardId, _currentHeartbeatInterval);
State = ShardState.Closing;
await conn.Disconnect(WebSocketCloseStatus.ProtocolError, "Did not receive ACK in time");
return(false);
}
// Otherwise just send it :)
await SendHeartbeat(conn);
_hasReceivedAck = false;
return(true);
}
private async Task SendHeartbeat(ShardConnection conn)
{
_logger.Debug("Shard {ShardId}: Sending heartbeat with seq.no. {LastSequence}",
ShardId, SessionInfo.LastSequence);
await conn.Send(new GatewayPacket { Opcode = GatewayOpcode.Heartbeat, Payload = SessionInfo.LastSequence });
_lastHeartbeatSent = DateTimeOffset.UtcNow;
}
private async Task <bool> Tick(ShardConnection conn)
{
if (conn.State != WebSocketState.Connecting && conn.State != WebSocketState.Open)
{
return(false);
}
if (!await TickHeartbeat(conn))
{
// TickHeartbeat returns false if we're disconnecting
return(false);
}
return(true);
}