[MM-58500] Turn off PostedAck when the connection is no longer registered (#27212)

* [MM-58500] Turn off PostedAck when the connection is no longer registered

* Expose active and just check for active instead

server/channels/app/platform/web_conn.go

@@ -107,7 +107,7 @@ type WebConn struct {
 	deadQueuePointer int
 	// active indicates whether there is an open websocket connection attached
 	// to this webConn or not.
-	active atomic.Bool
+	Active atomic.Bool
 	// reuseCount indicates how many times this connection has been reused.
 	// This is used to differentiate between a fresh connection and
 	// a reused connection.
@@ -245,7 +245,7 @@ func (ps *PlatformService) NewWebConn(cfg *WebConnConfig, suite SuiteIFace, runn
 		lastLogTimeFull:    time.Now(),
 		originClient:       cfg.OriginClient,
 	}
-	wc.active.Store(cfg.Active)
+	wc.Active.Store(cfg.Active)
 
 	wc.SetSession(&cfg.Session)
 	wc.SetSessionToken(cfg.Session.Token)
@@ -555,7 +555,7 @@ func (wc *WebConn) writePump() {
 				continue
 			}
 
-			if wc.active.Load() && len(wc.send) >= sendFullWarn && time.Since(wc.lastLogTimeFull) > websocketSuppressWarnThreshold {
+			if wc.Active.Load() && len(wc.send) >= sendFullWarn && time.Since(wc.lastLogTimeFull) > websocketSuppressWarnThreshold {
 				logData := []mlog.Field{
 					mlog.String("user_id", wc.UserId),
 					mlog.String("conn_id", wc.GetConnectionID()),
@@ -812,7 +812,7 @@ func (wc *WebConn) ShouldSendEvent(msg *model.WebSocketEvent) bool {
 		case model.WebsocketEventTyping,
 			model.WebsocketEventStatusChange,
 			model.WebsocketEventMultipleChannelsViewed:
-			if wc.active.Load() && time.Since(wc.lastLogTimeSlow) > websocketSuppressWarnThreshold {
+			if wc.Active.Load() && time.Since(wc.lastLogTimeSlow) > websocketSuppressWarnThreshold {
 				mlog.Warn(
 					"websocket.slow: dropping message",
 					mlog.String("user_id", wc.UserId),