private async Task RegisterInternalAsync(
ISubscription subscription,
ISocketConnection connection)
{
if (_subs.TryAdd(subscription.Id, new Sub(subscription, connection)))
{
connection.Disposed += (sender, args) => RemoveSubscription(subscription.Id);
if (connection.IsClosed)
{
_subs.TryRemove(subscription.Id, out _);
return;
}
subscription.OnRegister(() => UnregisterAsync(subscription.Id));
var writer = new SocketMessageWriter();
writer.WriteStartObject();
writer.WriteType(MessageTypes.Subscription.Start);
writer.WriteId(subscription.Id);
writer.WriteStartPayload();
subscription.OperationFormatter.Serialize(subscription.Operation, writer);
writer.WriteEndObject();
await connection.SendAsync(writer.Body).ConfigureAwait(false);
}
}
/// <summary>
/// Writes a <see cref="GraphQLWebSocketMessageType.ConnectionInit"/>message to the writer
/// </summary>
/// <param name="writer">The writer</param>
/// <param name="payload">The payload of the init message</param>
public static void WriteInitializeMessage(
this SocketMessageWriter writer,
object?payload)
{
writer.WriteStartObject();
writer.WriteType(GraphQLWebSocketMessageType.ConnectionInit);
if (payload is not null)
{
writer.WriteStartPayload();
JsonSerializer.Serialize(writer.Writer, payload);
}
writer.WriteEndObject();
}
/// <summary>
/// Writes a <see cref="GraphQLWebSocketMessageType.Start"/> message to the writer
/// </summary>
/// <param name="writer">The writer</param>
/// <param name="operationId">The operation id of the operation</param>
/// <param name="request">The operation request containing the payload</param>
public static void WriteStartOperationMessage(
this SocketMessageWriter writer,
string operationId,
OperationRequest request)
{
if (operationId == null)
{
throw new ArgumentNullException(nameof(operationId));
}
if (request == null)
{
throw new ArgumentNullException(nameof(request));
}
writer.WriteStartObject();
writer.WriteType(GraphQLWebSocketMessageType.Start);
writer.WriteId(operationId);
writer.WriteStartPayload();
writer.Serialize(request);
writer.WriteEndObject();
}