393 lines
11 KiB
Go
393 lines
11 KiB
Go
package core
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import (
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"context"
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"sort"
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"strings"
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"sync"
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"time"
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"github.com/Masterminds/squirrel"
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"github.com/microcosm-cc/bluemonday"
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"github.com/navidrome/navidrome/consts"
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"github.com/navidrome/navidrome/core/agents"
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_ "github.com/navidrome/navidrome/core/agents/lastfm"
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_ "github.com/navidrome/navidrome/core/agents/spotify"
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"github.com/navidrome/navidrome/log"
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"github.com/navidrome/navidrome/model"
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"github.com/navidrome/navidrome/utils"
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)
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const (
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unavailableArtistID = "-1"
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maxSimilarArtists = 100
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)
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type ExternalMetadata interface {
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UpdateArtistInfo(ctx context.Context, id string, count int, includeNotPresent bool) (*model.Artist, error)
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SimilarSongs(ctx context.Context, id string, count int) (model.MediaFiles, error)
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TopSongs(ctx context.Context, artist string, count int) (model.MediaFiles, error)
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}
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type externalMetadata struct {
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ds model.DataStore
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}
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type auxArtist struct {
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model.Artist
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Name string
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}
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func NewExternalMetadata(ds model.DataStore) ExternalMetadata {
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return &externalMetadata{ds: ds}
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}
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func (e *externalMetadata) getArtist(ctx context.Context, id string) (*auxArtist, error) {
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var entity interface{}
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entity, err := GetEntityByID(ctx, e.ds, id)
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if err != nil {
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return nil, err
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}
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var artist auxArtist
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switch v := entity.(type) {
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case *model.Artist:
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artist.Artist = *v
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artist.Name = clearName(v.Name)
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case *model.MediaFile:
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return e.getArtist(ctx, v.ArtistID)
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case *model.Album:
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return e.getArtist(ctx, v.AlbumArtistID)
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default:
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return nil, model.ErrNotFound
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}
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return &artist, nil
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}
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// Replace some Unicode chars with their equivalent ASCII
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func clearName(name string) string {
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name = strings.ReplaceAll(name, "–", "-")
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name = strings.ReplaceAll(name, "‐", "-")
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name = strings.ReplaceAll(name, "“", `"`)
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name = strings.ReplaceAll(name, "”", `"`)
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name = strings.ReplaceAll(name, "‘", `'`)
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name = strings.ReplaceAll(name, "’", `'`)
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return name
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}
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func (e *externalMetadata) UpdateArtistInfo(ctx context.Context, id string, similarCount int, includeNotPresent bool) (*model.Artist, error) {
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artist, err := e.getArtist(ctx, id)
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if err != nil {
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return nil, err
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}
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// If we have fresh info, just return it and trigger a refresh in the background
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if time.Since(artist.ExternalInfoUpdatedAt) < consts.ArtistInfoTimeToLive {
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go func() {
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ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
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defer cancel()
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err := e.refreshArtistInfo(ctx, artist)
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if err != nil {
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log.Error("Error refreshing ArtistInfo", "id", id, "name", artist.Name, err)
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}
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}()
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log.Debug("Found cached ArtistInfo, refreshing in the background", "updatedAt", artist.ExternalInfoUpdatedAt, "name", artist.Name)
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err := e.loadSimilar(ctx, artist, similarCount, includeNotPresent)
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return &artist.Artist, err
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}
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log.Debug(ctx, "ArtistInfo not cached or expired", "updatedAt", artist.ExternalInfoUpdatedAt, "id", id, "name", artist.Name)
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err = e.refreshArtistInfo(ctx, artist)
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if err != nil {
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return nil, err
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}
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err = e.loadSimilar(ctx, artist, similarCount, includeNotPresent)
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return &artist.Artist, err
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}
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func (e *externalMetadata) refreshArtistInfo(ctx context.Context, artist *auxArtist) error {
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ag := agents.NewAgents(ctx)
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// Get MBID first, if it is not yet available
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if artist.MbzArtistID == "" {
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mbid, err := ag.GetMBID(artist.ID, artist.Name)
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if mbid != "" && err == nil {
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artist.MbzArtistID = mbid
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}
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}
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// Call all registered agents and collect information
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callParallel([]func(){
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func() { e.callGetBiography(ctx, ag, artist) },
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func() { e.callGetURL(ctx, ag, artist) },
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func() { e.callGetImage(ctx, ag, artist) },
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func() { e.callGetSimilar(ctx, ag, artist, maxSimilarArtists, true) },
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})
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if utils.IsCtxDone(ctx) {
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log.Warn(ctx, "ArtistInfo update canceled", ctx.Err())
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return ctx.Err()
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}
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artist.ExternalInfoUpdatedAt = time.Now()
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err := e.ds.Artist(ctx).Put(&artist.Artist)
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if err != nil {
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log.Error(ctx, "Error trying to update artist external information", "id", artist.ID, "name", artist.Name, err)
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}
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log.Trace(ctx, "ArtistInfo collected", "artist", artist)
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return nil
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}
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func callParallel(fs []func()) {
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wg := &sync.WaitGroup{}
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wg.Add(len(fs))
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for _, f := range fs {
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go func(f func()) {
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f()
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wg.Done()
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}(f)
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}
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wg.Wait()
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}
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func (e *externalMetadata) SimilarSongs(ctx context.Context, id string, count int) (model.MediaFiles, error) {
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ag := agents.NewAgents(ctx)
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artist, err := e.getArtist(ctx, id)
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if err != nil {
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return nil, err
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}
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e.callGetSimilar(ctx, ag, artist, 15, false)
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if utils.IsCtxDone(ctx) {
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log.Warn(ctx, "SimilarSongs call canceled", ctx.Err())
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return nil, ctx.Err()
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}
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artists := model.Artists{artist.Artist}
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artists = append(artists, artist.SimilarArtists...)
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weightedSongs := utils.NewWeightedRandomChooser()
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for _, a := range artists {
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if utils.IsCtxDone(ctx) {
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log.Warn(ctx, "SimilarSongs call canceled", ctx.Err())
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return nil, ctx.Err()
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}
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topCount := utils.MaxInt(count, 20)
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topSongs, err := e.getMatchingTopSongs(ctx, ag, &auxArtist{Name: a.Name, Artist: a}, topCount)
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if err != nil {
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log.Warn(ctx, "Error getting artist's top songs", "artist", a.Name, err)
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continue
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}
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weight := topCount * 4
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for _, mf := range topSongs {
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weightedSongs.Put(mf, weight)
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weight -= 4
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}
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}
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var similarSongs model.MediaFiles
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for len(similarSongs) < count && weightedSongs.Size() > 0 {
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s, err := weightedSongs.GetAndRemove()
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if err != nil {
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log.Warn(ctx, "Error getting weighted song", err)
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continue
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}
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similarSongs = append(similarSongs, s.(model.MediaFile))
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}
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return similarSongs, nil
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}
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func (e *externalMetadata) TopSongs(ctx context.Context, artistName string, count int) (model.MediaFiles, error) {
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ag := agents.NewAgents(ctx)
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artist, err := e.findArtistByName(ctx, artistName)
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if err != nil {
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log.Error(ctx, "Artist not found", "name", artistName, err)
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return nil, nil
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}
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return e.getMatchingTopSongs(ctx, ag, artist, count)
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}
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func (e *externalMetadata) getMatchingTopSongs(ctx context.Context, agent agents.ArtistTopSongsRetriever, artist *auxArtist, count int) (model.MediaFiles, error) {
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songs, err := agent.GetTopSongs(artist.ID, artist.Name, artist.MbzArtistID, count)
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if err != nil {
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return nil, err
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}
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var mfs model.MediaFiles
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for _, t := range songs {
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mf, err := e.findMatchingTrack(ctx, t.MBID, artist.ID, t.Name)
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if err != nil {
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continue
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}
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mfs = append(mfs, *mf)
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if len(mfs) == count {
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break
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}
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}
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return mfs, nil
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}
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func (e *externalMetadata) findMatchingTrack(ctx context.Context, mbid string, artistID, title string) (*model.MediaFile, error) {
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if mbid != "" {
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mfs, err := e.ds.MediaFile(ctx).GetAll(model.QueryOptions{
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Filters: squirrel.Eq{"mbz_track_id": mbid},
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})
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if err == nil && len(mfs) > 0 {
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return &mfs[0], nil
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}
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}
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mfs, err := e.ds.MediaFile(ctx).GetAll(model.QueryOptions{
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Filters: squirrel.And{
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squirrel.Or{
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squirrel.Eq{"artist_id": artistID},
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squirrel.Eq{"album_artist_id": artistID},
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},
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squirrel.Like{"title": title},
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},
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Sort: "starred desc, rating desc, year asc",
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})
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if err != nil || len(mfs) == 0 {
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return nil, model.ErrNotFound
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}
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return &mfs[0], nil
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}
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func (e *externalMetadata) callGetURL(ctx context.Context, agent agents.ArtistURLRetriever, artist *auxArtist) {
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url, err := agent.GetURL(artist.ID, artist.Name, artist.MbzArtistID)
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if url == "" || err != nil {
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return
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}
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artist.ExternalUrl = url
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}
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func (e *externalMetadata) callGetBiography(ctx context.Context, agent agents.ArtistBiographyRetriever, artist *auxArtist) {
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bio, err := agent.GetBiography(artist.ID, clearName(artist.Name), artist.MbzArtistID)
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if bio == "" || err != nil {
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return
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}
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policy := bluemonday.UGCPolicy()
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bio = policy.Sanitize(bio)
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bio = strings.ReplaceAll(bio, "\n", " ")
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artist.Biography = strings.ReplaceAll(bio, "<a ", "<a target='_blank' ")
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}
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func (e *externalMetadata) callGetImage(ctx context.Context, agent agents.ArtistImageRetriever, artist *auxArtist) {
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images, err := agent.GetImages(artist.ID, artist.Name, artist.MbzArtistID)
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if len(images) == 0 || err != nil {
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return
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}
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sort.Slice(images, func(i, j int) bool { return images[i].Size > images[j].Size })
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if len(images) >= 1 {
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artist.LargeImageUrl = images[0].URL
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}
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if len(images) >= 2 {
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artist.MediumImageUrl = images[1].URL
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}
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if len(images) >= 3 {
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artist.SmallImageUrl = images[2].URL
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}
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}
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func (e *externalMetadata) callGetSimilar(ctx context.Context, agent agents.ArtistSimilarRetriever, artist *auxArtist,
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limit int, includeNotPresent bool) {
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similar, err := agent.GetSimilar(artist.ID, artist.Name, artist.MbzArtistID, limit)
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if len(similar) == 0 || err != nil {
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return
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}
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sa, err := e.mapSimilarArtists(ctx, similar, includeNotPresent)
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if err != nil {
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return
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}
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artist.SimilarArtists = sa
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}
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func (e *externalMetadata) mapSimilarArtists(ctx context.Context, similar []agents.Artist, includeNotPresent bool) (model.Artists, error) {
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var result model.Artists
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var notPresent []string
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// First select artists that are present.
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for _, s := range similar {
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sa, err := e.findArtistByName(ctx, s.Name)
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if err != nil {
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notPresent = append(notPresent, s.Name)
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continue
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}
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result = append(result, sa.Artist)
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}
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// Then fill up with non-present artists
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if includeNotPresent {
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for _, s := range notPresent {
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sa := model.Artist{ID: unavailableArtistID, Name: s}
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result = append(result, sa)
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}
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}
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return result, nil
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}
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func (e *externalMetadata) findArtistByName(ctx context.Context, artistName string) (*auxArtist, error) {
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artists, err := e.ds.Artist(ctx).GetAll(model.QueryOptions{
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Filters: squirrel.Like{"name": artistName},
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Max: 1,
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})
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if err != nil {
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return nil, err
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}
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if len(artists) == 0 {
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return nil, model.ErrNotFound
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}
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artist := &auxArtist{
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Artist: artists[0],
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Name: clearName(artists[0].Name),
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}
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return artist, nil
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}
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func (e *externalMetadata) loadSimilar(ctx context.Context, artist *auxArtist, count int, includeNotPresent bool) error {
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var ids []string
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for _, sa := range artist.SimilarArtists {
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if sa.ID == unavailableArtistID {
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continue
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}
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ids = append(ids, sa.ID)
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}
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similar, err := e.ds.Artist(ctx).GetAll(model.QueryOptions{
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Filters: squirrel.Eq{"id": ids},
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})
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if err != nil {
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return err
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}
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// Use a map and iterate through original array, to keep the same order
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artistMap := make(map[string]model.Artist)
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for _, sa := range similar {
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artistMap[sa.ID] = sa
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}
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var loaded model.Artists
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for _, sa := range artist.SimilarArtists {
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if len(loaded) >= count {
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break
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}
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la, ok := artistMap[sa.ID]
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if !ok {
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if !includeNotPresent {
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continue
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}
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la = sa
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la.ID = unavailableArtistID
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}
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loaded = append(loaded, la)
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}
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artist.SimilarArtists = loaded
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return nil
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}
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