Add support for playing a sound when the user exits a call.

src/rtcSessionHelpers.ts

@@ -120,6 +120,7 @@ export async function enterRTCSession(
 
 const widgetPostHangupProcedure = async (
   widget: WidgetHelpers,
+  promiseBeforeHangup?: Promise<unknown>,
 ): Promise<void> => {
   // we need to wait until the callEnded event is tracked on posthog.
   // Otherwise the iFrame gets killed before the callEnded event got tracked.
@@ -132,6 +133,8 @@ const widgetPostHangupProcedure = async (
     logger.error("Failed to set call widget `alwaysOnScreen` to false", e);
   }
 
+  // Wait for any last bits before hanging up.
+  await promiseBeforeHangup;
   // We send the hangup event after the memberships have been updated
   // calling leaveRTCSession.
   // We need to wait because this makes the client hosting this widget killing the IFrame.
@@ -140,9 +143,12 @@ const widgetPostHangupProcedure = async (
 
 export async function leaveRTCSession(
   rtcSession: MatrixRTCSession,
+  promiseBeforeHangup?: Promise<unknown>,
 ): Promise<void> {
   await rtcSession.leaveRoomSession();
   if (widget) {
-    await widgetPostHangupProcedure(widget);
+    await widgetPostHangupProcedure(widget, promiseBeforeHangup);
+  } else {
+    await promiseBeforeHangup;
   }
 }