When no media-specific top level directories exist, assume everything is music

src/tangara/database/database.cpp

@@ -292,9 +292,8 @@ auto Database::setTrackData(TrackId id, const TrackData& data) -> void {
 auto Database::getIndexes() -> std::vector<IndexInfo> {
   // TODO(jacqueline): This probably needs to be async? When we have runtime
   // configurable indexes, they will need to come from somewhere.
-  return {
+  return {kAllTracks,     kAllAlbums, kAlbumsByArtist,
-      kAllTracks, kAllAlbums, kAlbumsByArtist, kTracksByGenre, kPodcasts, kAudiobooks
+          kTracksByGenre, kPodcasts,  kAudiobooks};
-  };
 }
 
 Database::UpdateTracker::UpdateTracker()
@@ -568,6 +567,23 @@ auto Database::calculateMediaType(TrackTags& tags, std::string_view path)
     return MediaType::kMusic;
   }
 
+  auto dir_exists = [&](auto path) {
+    FF_DIR dir;
+    bool res = f_opendir(&dir, path);
+    if (res == FR_OK) {
+      f_closedir(&dir);
+    }
+    return res == FR_OK;
+  };
+
+  // As a special case, if no media-specific paths exist at all, then assume
+  // the user doesn't really care about alternate media types and just wants to
+  // use the device for music.
+  if (!dir_exists(kMusicMediaPath) && !dir_exists(kPodcastMediaPath) &&
+      !dir_exists(kAudiobookMediaPath)) {
+    return MediaType::kMusic;
+  }
+
   return MediaType::kUnknown;
 }