MetroList: Fixing Playlist Persistence Across Sync

Written by Alessio on 4/7/2026

Problem

Users reported songs disappearing from playlists after automatic sync completed. The sync ran, playlists appeared correct during execution, but post-sync the songs were gone.

The root cause: when adding songs to playlists, the app wasn't marking them as inLibrary. The sync logic interpreted these unmarked songs as orphaned and removed them.

Solution

Created addSongToPlaylistWithLibrarySync() function that marks songs as inLibrary when added to playlists. Updated all 12 entry points:

AddToPlaylistDialog
AddToPlaylistDialogOnline
ImportPlaylistDialog
WrappedManager
MusicService.kt (Android Auto)
YouTubePlaylistMenu.kt
LocalPlaylistScreen.kt
OnlinePlaylistScreen.kt
HomeScreen.kt
SyncUtils.kt (background sync)
StatsViewModel.kt

Implementation also preserves setVideoId for playlist reordering and ensures atomic database transactions.

Result

Songs now persist across automatic sync. Playlists maintain their contents reliably.

Commit: MetrolistGroup/Metrolist@4ef332d
PR: #3446