From be11b4cd1210e4d898a1a381a56c59bbcdeee6c5 Mon Sep 17 00:00:00 2001
From: aarsham <arsham.mp@gmail.com>
Date: Wed, 21 Feb 2024 20:41:12 +0330
Subject: [PATCH] fix(graphql): resolve duplicate events on socket reconnect

Resolved an issue in WebSocketClient where multiple listeners were added to `waitForConnectedState` when socket reconnects after subscription been requtesed with disconnected socket, causing duplicate events to be received by subscriptions.
---
 .../graphql/lib/src/links/websocket_link/websocket_client.dart   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/graphql/lib/src/links/websocket_link/websocket_client.dart b/packages/graphql/lib/src/links/websocket_link/websocket_client.dart
index 44341533..9f6ff470 100644
--- a/packages/graphql/lib/src/links/websocket_link/websocket_client.dart
+++ b/packages/graphql/lib/src/links/websocket_link/websocket_client.dart
@@ -502,6 +502,7 @@ class SocketClient {
             )
           : waitForConnectedStateWithoutTimeout;
 
+      sub?.cancel();
       sub = waitForConnectedState.listen((_) {
         final Stream<GraphQLSocketMessage> dataErrorComplete = _messages.where(
           (GraphQLSocketMessage message) {