Faster app start scop 3 - Lazy discover

lazy-discover.md

DiscoverFeedMainInteractor

@Override
  protected void didBecomeActive() {
    super.didBecomeActive();
    discoverBagelRefreshStream = BehaviorSubject.create();
    discoverManager.addGiveTakeItemEventListener(this);
    /*
    If something goes wrong witht the download of GiveTakes & RisingGiveTakes,
    discoverMatchRepository.getGiveTakesDownloaded() will never return
    User will be stuck seeing blank or infinite loading screen
    That's why timeout is important here
     */
    AtomicBoolean downloadCompleted = new AtomicBoolean();
    Disposable disposable = discoverMatchRepository.getGiveTakesDownloaded()
            .doOnTerminate(() -> downloadCompleted.set(true))
            .as(AutoDispose.autoDisposable(this))
            .subscribe(unit -> {
              Logger.d(TAG, "GiveTakes & RisingTakes downloaded and saved in local cache, now read from local cache and render");
              discoverManager.refreshGiveTakes();
            });
    /*
    Is there a simpler way to implement time limit with RxJava?
    Probably, need to dig, I don't know of top of my head
    This is probably where Coroutines can be simpler
     */
    Single.timer(30, TimeUnit.SECONDS)
            .as(AutoDispose.autoDisposable(this))
            .subscribe(aLong -> {
              if (!downloadCompleted.get()) {
                final String message = "GiveTakes & RisingGiveTakes download did not completed within reasonable time";
                Logger.e(TAG, message, new TimeoutException(message));
                disposable.dispose();
                getRouter().routeToDiscoverFeedEmpty();
              }
            });

    mainActivity.hideTabLayout();

    observeUpsellConditions();
  }