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db/SimpleDatabasePlugin: store `in_playlist` value of songs into database 

Fixes hide_playlist_targets not working after server restart

Currently, `hide_playlists_targets` works by skipping songs with
`in_playlist` value set to true in
[`Directory::Walk`](a57bcd0238/src/db/plugins/simple/Directory.cxx (L237)). But
`in_playlist` is not stored and only updated in
[`UpdateWalk::PurgeDanglingFromPlaylists`](a57bcd0238/src/db/update/Playlist.cxx (L139)),
which will only be executed while updating DB.

This causes the problem that playlist target songs are correctly
hidden after database update, but will remain visible after mpd server
restarted. This pr solves the problem by storing `in_playlist` value
of songs into the `SimpleDatabase` file.
This commit is contained in:
datasone 2023-04-12 00:04:37 +08:00 committed by Max Kellermann
parent 0d2f67b523
commit 838b19c2b5
3 changed files with 11 additions and 3 deletions
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8
src/SongSave.cxx
View File

@ -48,6 +48,9 @@ song_save(BufferedOutputStream &os, const Song &song)
if (song.audio_format.IsDefined())
os.Fmt(FMT_STRING("Format: {}\n"), song.audio_format);
if (song.in_playlist)
os.Write("InPlaylist: yes\n");
if (!IsNegative(song.mtime))
os.Fmt(FMT_STRING(SONG_MTIME ": {}\n"),
std::chrono::system_clock::to_time_t(song.mtime));
@ -71,7 +74,7 @@ song_save(BufferedOutputStream &os, const DetachedSong &song)
DetachedSong
song_load(LineReader &file, const char *uri,
std::string *target_r)
std::string *target_r, bool *in_playlist_r)
{
DetachedSong song(uri);
@ -116,6 +119,9 @@ song_load(LineReader &file, const char *uri,
song.SetStartTime(SongTime::FromMS(start_ms));
song.SetEndTime(SongTime::FromMS(end_ms));
} else if (StringIsEqual(line, "InPlaylist")) {
if (in_playlist_r != nullptr)
*in_playlist_r = StringIsEqual(value, "yes");
} else {
throw FmtRuntimeError("unknown line in db: {}", line);
}

2
src/SongSave.hxx
View File

@ -28,6 +28,6 @@ song_save(BufferedOutputStream &os, const DetachedSong &song);
*/
DetachedSong
song_load(LineReader &file, const char *uri,
std::string *target_r=nullptr);
std::string *target_r=nullptr, bool *in_playlist_r=nullptr);
#endif

4
src/db/plugins/simple/DirectorySave.cxx
View File

@ -154,12 +154,14 @@ directory_load(LineReader &file, Directory &directory)
name);
std::string target;
bool in_playlist = false;
auto detached_song = song_load(file, name,
&target);
&target, &in_playlist);
auto song = std::make_unique<Song>(std::move(detached_song),
directory);
song->target = std::move(target);
song->in_playlist = in_playlist;
directory.AddSong(std::move(song));
} else if ((p = StringAfterPrefix(line, PLAYLIST_META_BEGIN))) {