fix: checks preferecen and writes files externally, updates the ui

app/src/main/java/com/cappielloantonio/tempo/ui/adapter/PlayerSongQueueAdapter.java

@@ -23,6 +23,7 @@ import com.cappielloantonio.tempo.service.MediaManager;
 import com.cappielloantonio.tempo.subsonic.models.Child;
 import com.cappielloantonio.tempo.util.DownloadUtil;
 import com.cappielloantonio.tempo.util.Constants;
+import com.cappielloantonio.tempo.util.ExternalAudioReader;
 import com.cappielloantonio.tempo.util.MusicUtil;
 import com.cappielloantonio.tempo.util.Preferences;
 import com.google.common.util.concurrent.ListenableFuture;
@@ -31,7 +32,9 @@ import com.google.common.util.concurrent.MoreExecutors;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
 
 public class PlayerSongQueueAdapter extends RecyclerView.Adapter<PlayerSongQueueAdapter.ViewHolder> {
     private static final String TAG = "PlayerSongQueueAdapter";
@@ -39,7 +42,7 @@ public class PlayerSongQueueAdapter extends RecyclerView.Adapter<PlayerSongQueue
 
     private ListenableFuture<MediaBrowser> mediaBrowserListenableFuture;
     private List<Child> songs;
-
+    private final Map<String, Boolean> downloadStatusCache = new ConcurrentHashMap<>();
     private String currentPlayingId;
     private boolean isPlaying;
     private List<Integer> currentPlayingPositions = Collections.emptyList();
@@ -80,7 +83,6 @@ public class PlayerSongQueueAdapter extends RecyclerView.Adapter<PlayerSongQueue
                 .build()
                 .thumbnail(thumbnail)
                 .into(holder.item.queueSongCoverImageView);
-
         MediaManager.getCurrentIndex(mediaBrowserListenableFuture, new MediaIndexCallback() {
             @Override
             public void onRecovery(int index) {
@@ -96,19 +98,22 @@ public class PlayerSongQueueAdapter extends RecyclerView.Adapter<PlayerSongQueue
             }
         });
 
-        DownloaderManager downloaderManager = DownloadUtil.getDownloadTracker(holder.itemView.getContext());
+        boolean isDownloaded = false;
 
+        if (Preferences.getDownloadDirectoryUri() == null) {
+            DownloaderManager downloaderManager = DownloadUtil.getDownloadTracker(holder.itemView.getContext());
             if (downloaderManager != null) {
-            boolean isDownloaded = downloaderManager.isDownloaded(song.getId());
+                isDownloaded = downloaderManager.isDownloaded(song.getId());
+            }
+        } else {
+            isDownloaded = ExternalAudioReader.getUri(song) != null;
+        }
 
         if (isDownloaded) {
             holder.item.downloadIndicatorIcon.setVisibility(View.VISIBLE);
         } else {
             holder.item.downloadIndicatorIcon.setVisibility(View.GONE);
         }
-        } else {
-            holder.item.downloadIndicatorIcon.setVisibility(View.GONE);
-        }
 
         if (Preferences.showItemRating()) {
             if (song.getStarred() == null && song.getUserRating() == null) {

app/src/main/java/com/cappielloantonio/tempo/ui/fragment/PlayerQueueFragment.java

@@ -21,6 +21,7 @@ import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.cappielloantonio.tempo.R;
 import com.cappielloantonio.tempo.databinding.InnerFragmentPlayerQueueBinding;
 import com.cappielloantonio.tempo.interfaces.ClickCallback;
 import com.cappielloantonio.tempo.service.DownloaderManager;
@@ -32,6 +33,8 @@ import com.cappielloantonio.tempo.ui.adapter.PlayerSongQueueAdapter;
 import com.cappielloantonio.tempo.ui.dialog.PlaylistChooserDialog;
 import com.cappielloantonio.tempo.util.Constants;
 import com.cappielloantonio.tempo.util.DownloadUtil;
+import com.cappielloantonio.tempo.util.ExternalAudioReader;
+import com.cappielloantonio.tempo.util.ExternalAudioWriter;
 import com.cappielloantonio.tempo.util.MappingUtil;
 import com.cappielloantonio.tempo.util.Preferences;
 import com.cappielloantonio.tempo.viewmodel.PlaybackViewModel;
@@ -384,8 +387,10 @@ public class PlayerQueueFragment extends Fragment implements ClickCallback {
             return;
         }
 
-        List<MediaItem> mediaItemsToDownload = MappingUtil.mapMediaItems(queueSongs);
+        int downloadCount = 0;
         
+        if (Preferences.getDownloadDirectoryUri() == null) {
+            List<MediaItem> mediaItemsToDownload = MappingUtil.mapMediaItems(queueSongs);
             List<com.cappielloantonio.tempo.model.Download> downloadModels = new ArrayList<>();
 
             for (Child child : queueSongs) {
@@ -401,11 +406,43 @@ public class PlayerQueueFragment extends Fragment implements ClickCallback {
 
             if (downloaderManager != null) {
                 downloaderManager.download(mediaItemsToDownload, downloadModels);
-            Toast.makeText(requireContext(), "Starting download of " + queueSongs.size() + " songs in the background.", Toast.LENGTH_SHORT).show();
+                downloadCount = queueSongs.size();
+                Toast.makeText(requireContext(), 
+                    getResources().getQuantityString(R.plurals.songs_download_started, downloadCount, downloadCount), 
+                    Toast.LENGTH_SHORT).show();
+                    
+                new Handler().postDelayed(() -> {
+                    if (playerSongQueueAdapter != null) {
+                        playerSongQueueAdapter.notifyDataSetChanged();
+                    }
+                }, 1000);
             } else {
                 Log.e(TAG, "DownloaderManager not initialized. Check DownloadUtil.");
                 Toast.makeText(requireContext(), "Download service unavailable.", Toast.LENGTH_SHORT).show();
             }
+        } else {
+            for (Child song : queueSongs) {
+                if (ExternalAudioReader.getUri(song) == null) {
+                    ExternalAudioWriter.downloadToUserDirectory(requireContext(), song);
+                    downloadCount++;
+                }
+            }
+            
+            if (downloadCount > 0) {
+                Toast.makeText(requireContext(),
+                    getResources().getQuantityString(R.plurals.songs_download_started, downloadCount, downloadCount),
+                    Toast.LENGTH_SHORT).show();
+                    
+                new Handler().postDelayed(() -> {
+                    if (playerSongQueueAdapter != null) {
+                        playerSongQueueAdapter.notifyDataSetChanged();
+                    }
+                }, 2000);
+            } else {
+                Toast.makeText(requireContext(), "All songs already downloaded", Toast.LENGTH_SHORT).show();
+            }
+        }
+        
         toggleFabMenu();
     }