feat: implement lyrics

[TorchedSammy]

closes #371

Implements both /getLyrics and OpenSubsonic /getLyricsBySongId

TODO:

• /getLyrics
  • Use artist in search for songs
  • Embedded
  • .lrc
• /getLyricsBySongId
  • Embedded
  • .lrc

[duckfromdiscord]

Awesome!

[duckfromdiscord]

I'm glad you also implemented /getLyrics since one of the apps I use is not maintained much anymore but does have support for it.

[TorchedSammy]

Works in Sonixd:
Does not seem to work in Symfonium. Now it does (?)

Should /getLyrics also return the timestamps as they are from the lrc file? I assume the current behavior is the correct one, where it's just the text. Though some clients will just parse the times from it.

[duckfromdiscord]

Should /getLyrics also return the timestamps as they are from the lrc file?

No, see the getLyrics example: https://www.subsonic.org/pages/inc/api/examples/lyrics_example_1.xml

[TorchedSammy]

Should this also pick up .txt files? I noticed that lrcget will download unsynced lyrics as .txt files.

[sentriz]

this looks great. i think we can get stuff merged incrementally here wdyt? for example just shipping support for .lrc files first in one PR. like you have here without extra stuff

[TorchedSammy]

I can exclude the embedded lyrics but can you give some guidance on how to query the artist in the database for /getLyrics search to be done?

[sentriz]

@TorchedSammy hi sorry for delay. regarding quering for artist, maybe ServeGetTopSongs could help. it does

	artistName, err := params.Get("artist")
	if err != nil {
		return spec.NewError(10, "please provide an `artist` parameter")
	}
	var artist db.Artist
	if err := c.dbc.Where("name=?", artistName).Find(&artist).Error; err != nil {
		return spec.NewError(0, "finding artist by name: %v", err)
	}

        // ...

        var tracks []*db.Track
	err = c.dbc.
                // ...
		Joins("JOIN track_artists ON track_artists.track_id=tracks.id").
		Joins("JOIN artists ON artists.id=track_artists.artist_id").
		Where("artists.id=?", artist.ID).
                // ...
		Error