Add info banner to the new local timeline

mastodon/src/main/java/org/joinmastodon/android/fragments/HomeTimelineFragment.java

@@ -43,6 +43,7 @@ import org.joinmastodon.android.model.Status;
 import org.joinmastodon.android.model.TimelineMarkers;
 import org.joinmastodon.android.ui.displayitems.GapStatusDisplayItem;
 import org.joinmastodon.android.ui.displayitems.StatusDisplayItem;
+import org.joinmastodon.android.ui.utils.DiscoverInfoBannerHelper;
 import org.joinmastodon.android.ui.viewcontrollers.HomeTimelineMenuController;
 import org.joinmastodon.android.ui.viewcontrollers.ToolbarDropdownMenuController;
 import org.joinmastodon.android.ui.views.FixedAspectRatioImageView;
@@ -61,6 +62,7 @@ import me.grishka.appkit.api.Callback;
 import me.grishka.appkit.api.ErrorResponse;
 import me.grishka.appkit.api.SimpleCallback;
 import me.grishka.appkit.utils.CubicBezierInterpolator;
+import me.grishka.appkit.utils.MergeRecyclerAdapter;
 import me.grishka.appkit.utils.V;
 
 public class HomeTimelineFragment extends StatusListFragment implements ToolbarDropdownMenuController.HostFragment{
@@ -77,6 +79,8 @@ public class HomeTimelineFragment extends StatusListFragment implements ToolbarD
 	private List<FollowList> lists=List.of();
 	private ListMode listMode=ListMode.FOLLOWING;
 	private FollowList currentList;
+	private MergeRecyclerAdapter mergeAdapter;
+	private DiscoverInfoBannerHelper localTimelineBannerHelper;
 
 	private String maxID;
 	private String lastSavedMarkerID;
@@ -85,6 +89,12 @@ public class HomeTimelineFragment extends StatusListFragment implements ToolbarD
 		setListLayoutId(R.layout.fragment_timeline);
 	}
 
+	@Override
+	public void onCreate(Bundle savedInstanceState){
+		super.onCreate(savedInstanceState);
+		localTimelineBannerHelper=new DiscoverInfoBannerHelper(DiscoverInfoBannerHelper.BannerType.LOCAL_TIMELINE, accountID);
+	}
+
 	@Override
 	public void onAttach(Activity activity){
 		super.onAttach(activity);
@@ -619,6 +629,25 @@ public class HomeTimelineFragment extends StatusListFragment implements ToolbarD
 		invalidateOptionsMenu();
 	}
 
+	@Override
+	protected RecyclerView.Adapter getAdapter(){
+		mergeAdapter=new MergeRecyclerAdapter();
+		mergeAdapter.addAdapter(super.getAdapter());
+		return mergeAdapter;
+	}
+
+	@Override
+	protected void onDataLoaded(List<Status> d, boolean more){
+		if(refreshing){
+			if(listMode==ListMode.LOCAL){
+				localTimelineBannerHelper.maybeAddBanner(list, mergeAdapter);
+			}else{
+				localTimelineBannerHelper.removeBanner(mergeAdapter);
+			}
+		}
+		super.onDataLoaded(d, more);
+	}
+
 	private String getCurrentListTitle(){
 		return switch(listMode){
 			case FOLLOWING -> getString(R.string.timeline_following);

mastodon/src/main/java/org/joinmastodon/android/ui/utils/DiscoverInfoBannerHelper.java

@@ -22,6 +22,8 @@ public class DiscoverInfoBannerHelper{
 	private final BannerType type;
 	private final String accountID;
 	private static EnumSet<BannerType> bannerTypesToShow=EnumSet.noneOf(BannerType.class);
+	private SingleViewRecyclerAdapter bannerAdapter;
+	private boolean added;
 
 	static{
 		for(BannerType t:BannerType.values()){
@@ -40,6 +42,8 @@ public class DiscoverInfoBannerHelper{
 	}
 
 	public void maybeAddBanner(RecyclerView list, MergeRecyclerAdapter adapter){
+		if(added)
+			return;
 		if(bannerTypesToShow.contains(type)){
 			banner=((Activity)list.getContext()).getLayoutInflater().inflate(R.layout.discover_info_banner, list, false);
 			TextView text=banner.findViewById(R.id.banner_text);
@@ -56,7 +60,8 @@ public class DiscoverInfoBannerHelper{
 				case LOCAL_TIMELINE -> R.drawable.ic_stream_24px;
 				case ACCOUNTS -> R.drawable.ic_group_add_24px;
 			});
-			adapter.addAdapter(new SingleViewRecyclerAdapter(banner));
+			adapter.addAdapter(0, bannerAdapter=new SingleViewRecyclerAdapter(banner));
+			added=true;
 		}
 	}
 
@@ -65,6 +70,13 @@ public class DiscoverInfoBannerHelper{
 		// bannerTypesToShow is not updated here on purpose so the banner keeps showing until the app is relaunched
 	}
 
+	public void removeBanner(MergeRecyclerAdapter adapter){
+		if(bannerAdapter!=null){
+			adapter.removeAdapter(bannerAdapter);
+			added=false;
+		}
+	}
+
 	public static void reset(){
 		SharedPreferences prefs=getPrefs();
 		SharedPreferences.Editor e=prefs.edit();