I have a situation where I need to make an popup inside a observable stream, and base on actions of that popup, my stream continue. something like this

switchMap(() => {
  if () { //not showing popup
     return of(something)
  }
  else {
     return openPopup();
  }
}),
// continue on stream

I imagine my openPopup would be something like this

openPopup(): Observable<boolean> {
  // something in here to trigger a custom component (I guess)
  // and then listen to its action here and return it
}

Can someone help to make an simple workaround?