Function startForegroundProbe

app/src/modules/websocket.js:91–129

(trigger)

}

function startForegroundProbe(trigger) {
  if (!S.ws || S.ws.readyState !== WebSocket.OPEN) return;
  if (S.foregroundProbeId) return;

  const probeId = `fg_${++S.foregroundProbeSeq}_${Date.now().toString(36)}`;
  S.foregroundProbeId = probeId;
  debugLog('foreground_probe_send', {
    trigger,
    probeId,
    sessionId: S.sessionId || null,
    lastSeq: S.lastSeq,
    waiting: S.waiting,
    wsState: wsReadyStateName(S.ws),
  });

  S.foregroundProbeTimer = setTimeout(() => {
    if (S.foregroundProbeId !== probeId) return;
    debugLog('foreground_probe_timeout', {
      trigger,
      probeId,
      sessionId: S.sessionId || null,
      lastSeq: S.lastSeq,
      waiting: S.waiting,
      wsState: wsReadyStateName(S.ws),
    });
    reconnectFromForeground('foreground_probe_timeout');
  }, FOREGROUND_PROBE_TIMEOUT_MS);

  try {
    S.ws.send(JSON.stringify({
      type: 'foreground_probe',
      probeId,
      sessionId: S.sessionId || null,
      lastSeq: S.lastSeq,
    }));
  } catch {
    reconnectFromForeground('foreground_probe_send_failed');
  }
}

export function recoverConnectionOnForeground(trigger) {
  if (typeof document !== 'undefined' && document.hidden) return;