Started working on a way to show that items are already in a playlist

app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistStreamDAO.java

@@ -59,6 +59,14 @@ public interface PlaylistStreamDAO extends BasicDAO<PlaylistStreamEntity> {
     )
     Flowable<Integer> getDuplicates(long playlistId, String streamURL);
 
+    @Query("SELECT " + JOIN_PLAYLIST_ID
+            + " FROM " + STREAM_TABLE
+            + " LEFT JOIN " + PLAYLIST_STREAM_JOIN_TABLE
+            + " ON " + STREAM_ID + " = " + JOIN_STREAM_ID
+            + " WHERE " + STREAM_URL + " = :streamURL"
+    )
+    Flowable<List<Long>> getDuplicatePlaylists(String streamURL);
+
 
     @Query("SELECT COALESCE(MAX(" + JOIN_INDEX + "), -1)"
             + " FROM " + PLAYLIST_STREAM_JOIN_TABLE

app/src/main/java/org/schabi/newpipe/local/LocalItemListAdapter.java

@@ -11,6 +11,7 @@ import androidx.recyclerview.widget.GridLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
 import org.schabi.newpipe.database.LocalItem;
+import org.schabi.newpipe.database.playlist.PlaylistMetadataEntry;
 import org.schabi.newpipe.database.stream.model.StreamStateEntity;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
 import org.schabi.newpipe.local.holder.LocalItemHolder;
@@ -344,6 +345,16 @@ public class LocalItemListAdapter extends RecyclerView.Adapter<RecyclerView.View
         }
     }
 
+    @Override
+    public long getItemId(final int position) {
+        final LocalItem item = localItems.get(0);
+        if (item != null && item.getLocalItemType() == LocalItem.LocalItemType.
+                PLAYLIST_LOCAL_ITEM) {
+            return ((PlaylistMetadataEntry) item).uid;
+        }
+        return super.getItemId(position);
+    }
+
     public GridLayoutManager.SpanSizeLookup getSpanSizeLookup(final int spanCount) {
         return new GridLayoutManager.SpanSizeLookup() {
             @Override

app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java

@@ -19,6 +19,7 @@ import org.schabi.newpipe.database.stream.model.StreamEntity;
 import org.schabi.newpipe.local.LocalItemListAdapter;
 import org.schabi.newpipe.local.playlist.LocalPlaylistManager;
 
+import java.util.HashMap;
 import java.util.List;
 
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
@@ -62,6 +63,7 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
                 new LocalPlaylistManager(NewPipeDatabase.getInstance(requireContext()));
 
         playlistAdapter = new LocalItemListAdapter(getActivity());
+        playlistAdapter.setHasStableIds(true);
         playlistAdapter.setSelectedListener(selectedItem -> {
             final List<StreamEntity> entities = getStreamEntities();
             if (selectedItem instanceof PlaylistMetadataEntry && entities != null) {
@@ -123,6 +125,35 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
             playlistAdapter.clearStreamItemList();
             playlistAdapter.addItems(playlists);
             playlistRecyclerView.setVisibility(View.VISIBLE);
+
+            final LocalPlaylistManager playlistManager =
+                    new LocalPlaylistManager(NewPipeDatabase.getInstance(requireContext()));
+            final List<Long> duplicateIds = playlistManager.getDuplicatePlaylist(getStreamEntities()
+                    .get(0).getUrl()).blockingFirst();
+
+            final HashMap<Integer, Long> map = new HashMap<>();
+            for (int i = 0; i < playlists.size(); i++) {
+                map.put(i, playlists.get(i).uid);
+            }
+
+            playlistRecyclerView.postDelayed(new Runnable() {
+                @Override
+                public void run() {
+                    if (playlistRecyclerView.getAdapter() == null) {
+                        return;
+                    }
+                    final int count = playlistRecyclerView.getAdapter().getItemCount();
+                    System.out.println(" kasjdflkalk" + playlistRecyclerView.getAdapter()
+                            .getItemId(0));
+                    for (int i = 0; i < count; i++) {
+                        if (playlistRecyclerView.findViewHolderForAdapterPosition(i) != null
+                                && duplicateIds.contains(playlistAdapter.getItemId(i))) {
+                            playlistRecyclerView.findViewHolderForAdapterPosition(i).itemView
+                                    .findViewById(R.id.checkmark2).setVisibility(View.VISIBLE);
+                        }
+                    }
+                }
+            }, 1000);
         }
     }
 
@@ -163,7 +194,6 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
                                        @NonNull final LocalPlaylistManager manager,
                                        @NonNull final PlaylistMetadataEntry playlist,
                                        @NonNull final List<StreamEntity> streams) {
-        //TODO: change color
         final AlertDialog.Builder builder = new AlertDialog.Builder(this.getActivity());
         builder.setTitle(R.string.duplicate_stream_in_playlist_title);
         builder.setMessage(getString(R.string.duplicate_stream_in_playlist_description,

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java

@@ -95,6 +95,10 @@ public class LocalPlaylistManager {
         return playlistStreamTable.getDuplicates(playlistId, streamURL);
     }
 
+    public Flowable<List<Long>> getDuplicatePlaylist(final String streamURL) {
+        return playlistStreamTable.getDuplicatePlaylists(streamURL);
+    }
+
     public Single<Integer> deletePlaylist(final long playlistId) {
         return Single.fromCallable(() -> playlistTable.deletePlaylist(playlistId))
                 .subscribeOn(Schedulers.io());

app/src/main/res/layout/list_playlist_mini_item.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/itemRoot"
     android:layout_width="match_parent"
@@ -21,6 +22,17 @@
         android:src="@drawable/placeholder_thumbnail_playlist"
         tools:ignore="RtlHardcoded" />
 
+
+    <ImageView
+        android:id="@+id/checkmark2"
+        android:layout_width="20dp"
+        android:layout_height="20dp"
+        android:layout_alignBottom="@id/itemThumbnailView"
+        android:layout_marginBottom="-1dp"
+        android:src="@drawable/ic_done"
+        android:visibility="gone"
+        app:tint="#E81111" />
+
     <org.schabi.newpipe.views.NewPipeTextView
         android:id="@+id/itemStreamCountView"
         android:layout_width="45dp"