many fixes

app/src/main/java/ru/vtosters/lite/music/cache/MusicCacheImpl.java

@@ -59,7 +59,7 @@ public class MusicCacheImpl {
     }
 
     public static boolean hasPlaylist() {
-        return PlaylistCacheDbDelegate.getPlaylistsCount(AndroidUtils.getGlobalContext()) != 0; // has playlists or not
+        return !PlaylistCacheDbDelegate.isPlaylistsDbEmpty(AndroidUtils.getGlobalContext()); // has playlists or not
     }
 
     public static long getTracksCount() {
@@ -89,7 +89,7 @@ public class MusicCacheImpl {
     }
 
     public static boolean isEmpty() {
-        return !LibVKXClient.isIntegrationEnabled() && getTracksCount() == 0L && PlaylistCacheDbDelegate.isPlaylistsDbEmpty(AndroidUtils.getGlobalContext());
+        return !LibVKXClient.isIntegrationEnabled() && MusicCacheDbDelegate.isEmpty(AndroidUtils.getGlobalContext());
     }
 
     public static void clear() {

app/src/main/java/ru/vtosters/lite/music/cache/db/PlaylistCacheDb.java

@@ -184,6 +184,26 @@ public class PlaylistCacheDb extends SQLiteOpenHelper implements AutoCloseable {
         return count;
     }
 
+    public List<String> getAllPlaylistIds() {
+        SQLiteDatabase db = getReadableDatabase();
+        List<String> playlistIds = new ArrayList<>();
+        Cursor cursor = db.query(
+                Constants.TABLE_NAME,
+                new String[]{Constants.COLUMN_ID, Constants.COLUMN_OWNER_ID},
+                null, null, null, null, null
+        );
+
+        if (cursor.moveToFirst()) {
+            do {
+                String playlistId = cursor.getString(cursor.getColumnIndexOrThrow(Constants.COLUMN_OWNER_ID)) + "_" + cursor.getString(cursor.getColumnIndexOrThrow(Constants.COLUMN_ID));
+                playlistIds.add(playlistId);
+            } while (cursor.moveToNext());
+        }
+
+        cursor.close();
+        return playlistIds;
+    }
+
     public boolean isPlaylistsDbEmpty() {
         SQLiteDatabase db = getReadableDatabase();
         Cursor cursor = db.rawQuery("SELECT EXISTS(SELECT 1 FROM " + Constants.TABLE_NAME + " LIMIT 1)", null);

app/src/main/java/ru/vtosters/lite/music/cache/delegate/PlaylistCacheDbDelegate.java

@@ -74,6 +74,19 @@ public class PlaylistCacheDbDelegate {
         }
     }
 
+    public static void removeAllPlaylists(Context context) {
+        List<String> playlistIds = getAllPlaylistIds(context);
+        for (String playlistId : playlistIds) {
+            deletePlaylist(context, playlistId);
+        }
+    }
+
+    public static List<String> getAllPlaylistIds(Context context) {
+        try (var db = connectToDb(context)) {
+            return db.getAllPlaylistIds();
+        }
+    }
+
     public static boolean isCachedPlaylist(Context context, String id) {
         try (var db = connectToDb(context)) {
             String[] parts = id.split("_");

app/src/main/java/ru/vtosters/lite/music/cache/helpers/PlaylistHelper.java

@@ -112,8 +112,8 @@ public class PlaylistHelper {
             arr.put(AccountManagerUtils.getUserId() + "_-1");
         }
 
-        for (var playlist : MusicCacheImpl.getPlaylists()) {
-            arr.put(playlist.v1());
+        for (String playlist : PlaylistCacheDbDelegate.getAllPlaylistIds(AndroidUtils.getGlobalContext())) {
+            arr.put(playlist);
         }
 
         return arr;

app/src/main/java/ru/vtosters/lite/music/cache/helpers/TracklistHelper.java

@@ -28,7 +28,7 @@ public class TracklistHelper {
 
         boolean doNotinvertOrder = Preferences.getBoolValue("invertCachedTracks", false);
 
-        if (!doNotinvertOrder) {
+        if (doNotinvertOrder) {
             Collections.reverse(tracks);
         }
 

app/src/main/java/ru/vtosters/lite/ui/fragments/MusicFragment.java

@@ -20,6 +20,7 @@ import ru.vtosters.lite.music.LastFMScrobbler;
 import ru.vtosters.lite.music.cache.MusicCacheImpl;
 import ru.vtosters.lite.music.cache.delegate.PlaylistCacheDbDelegate;
 import ru.vtosters.lite.ui.PreferenceFragmentUtils;
+import ru.vtosters.lite.utils.AccountManagerUtils;
 import ru.vtosters.lite.utils.AndroidUtils;
 import ru.vtosters.lite.utils.LifecycleUtils;
 
@@ -55,7 +56,7 @@ public class MusicFragment extends TrackedMaterialPreferenceToolbarFragment {
                     if (MusicCacheImpl.isEmpty()) {
                         AndroidUtils.sendToast(requireContext().getString(com.vtosters.lite.R.string.no_cache_error));
                     } else {
-                        delcache(requireContext());
+                        delcache(requireContext(), false);
                     }
                     return true;
                 }
@@ -73,6 +74,18 @@ public class MusicFragment extends TrackedMaterialPreferenceToolbarFragment {
                         return true;
                     }
             );
+
+            PreferenceFragmentUtils.addPreference(
+                    getPreferenceScreen(),
+                    "cached_playlists",
+                    "Удалить все скачанные плейлисты",
+                    null,
+                    null,
+                    preference -> {
+                        delcache(requireContext(), true);
+                        return true;
+                    }
+            );
         }
 
         PreferenceFragmentUtils.addPreference(
@@ -443,12 +456,18 @@ public class MusicFragment extends TrackedMaterialPreferenceToolbarFragment {
         builder.show();
     }
 
-    private void delcache(Context ctx) {
+    private void delcache(Context ctx, boolean isPlaylists) {
         new VkAlertDialog.Builder(ctx)
                 .setTitle(com.vtosters.lite.R.string.warning)
                 .setMessage(com.vtosters.lite.R.string.cached_tracks_remove_confirm)
                 .setPositiveButton(com.vtosters.lite.R.string.yes, (dialog, which) -> {
-                    executor.submit(MusicCacheImpl::clear);
+                    executor.submit(() -> {
+                        if (isPlaylists) {
+                            PlaylistCacheDbDelegate.removeAllPlaylists(ctx);
+                        } else {
+                            PlaylistCacheDbDelegate.deletePlaylist(ctx, AccountManagerUtils.getUserId() + "_-1");
+                        }
+                    });
                     findPreference("cached_tracks").setSummary(String.format(requireContext().getString(com.vtosters.lite.R.string.cached_tracks_counter), MusicCacheImpl.getTracksCount()));
                 })
                 .setNeutralButton(com.vtosters.lite.R.string.no, (dialog, which) -> dialog.cancel())