feat: add beatport provider

internal/app/app.go

@@ -21,6 +21,7 @@ import (
 	"streamrip-go/internal/jsonutil"
 	"streamrip-go/internal/naming"
 	"streamrip-go/internal/provider"
+	beatportprovider "streamrip-go/internal/provider/beatport"
 	deezerprovider "streamrip-go/internal/provider/deezer"
 	qobuzprovider "streamrip-go/internal/provider/qobuz"
 	soundcloudprovider "streamrip-go/internal/provider/soundcloud"
@@ -110,6 +111,7 @@ func New(cfg *config.Config) (*Main, error) {
 	}
 
 	providers := map[string]provider.Client{
+		"beatport":   beatportprovider.New(cfg),
 		"qobuz":      qobuzprovider.New(cfg),
 		"tidal":      tidalprovider.New(cfg),
 		"deezer":     deezerprovider.New(cfg),
@@ -203,7 +205,12 @@ func (m *Main) AddByID(ctx context.Context, source, mediaType, id string) error
 				case "artist":
 					return m.ripCollection(ctx, p, source, "Artist", id, meta)
 				case "label":
+					if source == "beatport" {
+						return m.ripTrackCollection(ctx, p, source, "Label", id, meta, false)
+					}
 					return m.ripCollection(ctx, p, source, "Label", id, meta)
+				case "chart":
+					return m.ripTrackCollection(ctx, p, source, "Chart", id, meta, true)
 				case "video":
 					return m.ripVideo(ctx, p, source, id, meta)
 				default:
@@ -327,6 +334,98 @@ func (m *Main) ripCollection(ctx context.Context, p provider.Client, source, kin
 	return nil
 }
 
+func (m *Main) ripTrackCollection(ctx context.Context, p provider.Client, source, kind, id string, meta map[string]any, playlistLike bool) error {
+	if err := m.requireSourceDownloadAuth(source); err != nil {
+		return err
+	}
+	name := titleFromMetadata(meta, id)
+	if n := jsonutil.StringFromAny(meta["name"]); n != "" {
+		name = n
+	}
+	base := m.Config.Session.Downloads.Folder
+	if m.Config.Session.Downloads.SourceSubdirectories {
+		base = filepath.Join(base, jsonutil.TitleCase(source))
+	}
+	folder := filepath.Join(base, naming.CleanName(name, naming.Config{RestrictCharacters: m.Config.Session.Filepaths.RestrictCharacters, TruncateTo: m.Config.Session.Filepaths.TruncateTo}))
+	tracksMap, ok := meta["tracks"].(map[string]any)
+	if !ok {
+		return fmt.Errorf("%s missing tracks data", strings.ToLower(kind))
+	}
+	rawItems := make([]any, 0)
+	switch items := tracksMap["items"].(type) {
+	case []any:
+		rawItems = items
+	case []map[string]any:
+		for _, item := range items {
+			rawItems = append(rawItems, item)
+		}
+	default:
+		return fmt.Errorf("%s tracks missing items", strings.ToLower(kind))
+	}
+	ids := make([]string, 0, len(rawItems))
+	for _, raw := range rawItems {
+		itm, ok := raw.(map[string]any)
+		if !ok {
+			continue
+		}
+		if id := jsonutil.StringFromAny(itm["id"]); id != "" {
+			ids = append(ids, id)
+		}
+	}
+	m.logf("%s: %s (%d tracks)\n", kind, name, len(ids))
+	failures := 0
+	runOne := func(i int, trackID string) {
+		opts := ripTrackOptions{albumFolder: folder, index: i, total: len(ids)}
+		if playlistLike {
+			opts.forPlaylist = true
+			opts.playlistName = name
+			opts.playlistPos = i
+		}
+		if err := m.ripTrack(ctx, p, source, trackID, "", opts); err != nil {
+			failures++
+			m.logf("track failed: id=%s reason=%v\n", trackID, err)
+		}
+	}
+	if !m.Config.Session.Downloads.Concurrency || m.Config.Session.Downloads.MaxConnections == 1 {
+		for i, trackID := range ids {
+			runOne(i+1, trackID)
+		}
+	} else {
+		maxWorkers := m.Config.Session.Downloads.MaxConnections
+		if maxWorkers <= 0 {
+			maxWorkers = 6
+		}
+		sem := make(chan struct{}, maxWorkers)
+		var wg sync.WaitGroup
+		var mu sync.Mutex
+		for i, trackID := range ids {
+			wg.Add(1)
+			sem <- struct{}{}
+			go func(pos int, tid string) {
+				defer wg.Done()
+				defer func() { <-sem }()
+				opts := ripTrackOptions{albumFolder: folder, index: pos, total: len(ids)}
+				if playlistLike {
+					opts.forPlaylist = true
+					opts.playlistName = name
+					opts.playlistPos = pos
+				}
+				if err := m.ripTrack(ctx, p, source, tid, "", opts); err != nil {
+					mu.Lock()
+					failures++
+					m.logf("track failed: id=%s reason=%v\n", tid, err)
+					mu.Unlock()
+				}
+			}(i+1, trackID)
+		}
+		wg.Wait()
+	}
+	if failures > 0 {
+		m.logf("%s done with %d failed track(s)\n", kind, failures)
+	}
+	return nil
+}
+
 func (m *Main) ripVideo(ctx context.Context, p provider.Client, source, videoID string, meta map[string]any) error {
 	alreadyDownloaded, err := m.Store.IsDownloaded(ctx, source, videoID)
 	if err == nil && alreadyDownloaded && !m.IgnoreDB {
@@ -924,8 +1023,11 @@ downloaded:
 				embedCoverPath = res.EmbedPath
 			}
 		}
-	} else if opts.albumFolder == "" {
-		parent := filepath.Dir(outPath)
+	} else if embedCoverPath == "" {
+		parent := opts.albumFolder
+		if parent == "" {
+			parent = filepath.Dir(outPath)
+		}
 		if res, prepErr := artwork.Prepare(ctx, m.DL, parent, trackMetaAlbum(meta), m.Config.Session.Artwork, false); prepErr == nil {
 			if res.EmbedPath != "" {
 				embedCoverPath = res.EmbedPath
@@ -971,6 +1073,8 @@ func (m *Main) qualityForSource(source string) int {
 		return m.Config.Session.Deezer.Quality
 	case "yandex":
 		return m.Config.Session.Yandex.Quality
+	case "beatport":
+		return m.Config.Session.Beatport.Quality
 	case "soundcloud":
 		return m.Config.Session.Soundcloud.Quality
 	default:
@@ -1313,6 +1417,11 @@ func buildTagMetadata(trackMeta map[string]any, title, source, trackID string, o
 	if genre == "" {
 		genre = jsonutil.StringFromAny(trackMeta["genre"])
 	}
+	initialKey := jsonutil.FirstNonEmpty(
+		jsonutil.StringFromAny(trackMeta["key"]),
+		jsonutil.StringFromAny(trackMeta["initialkey"]),
+	)
+	initialKey = normalizeInitialKey(initialKey)
 
 	comment := jsonutil.StringFromAny(trackMeta["comment"])
 	description := jsonutil.StringFromAny(trackMeta["description"])
@@ -1368,6 +1477,7 @@ func buildTagMetadata(trackMeta map[string]any, title, source, trackID string, o
 		DiscTotal:           discTotal,
 		Date:                date,
 		Genre:               genre,
+		InitialKey:          initialKey,
 		Comment:             comment,
 		Description:         description,
 		Lyrics:              lyrics,
@@ -1384,6 +1494,67 @@ func buildTagMetadata(trackMeta map[string]any, title, source, trackID string, o
 	}
 }
 
+func normalizeInitialKey(in string) string {
+	s := strings.TrimSpace(in)
+	if s == "" {
+		return ""
+	}
+	parts := strings.Fields(s)
+	if len(parts) >= 2 {
+		switch strings.ToLower(parts[1]) {
+		case "major", "maj":
+			if root := normalizeMajorKeyRoot(parts[0]); root != "" {
+				return root
+			}
+		case "minor", "min":
+			if root := normalizeMinorKeyRoot(parts[0]); root != "" {
+				return root + "m"
+			}
+		}
+	}
+	if strings.HasSuffix(s, "m") && len(s) > 1 {
+		root := normalizeMinorKeyRoot(strings.TrimSuffix(s, "m"))
+		if root != "" {
+			return root + "m"
+		}
+	}
+	if root := normalizeMajorKeyRoot(s); root != "" {
+		return root
+	}
+	return s
+}
+
+func normalizeMajorKeyRoot(root string) string {
+	s := normalizeKeyRootCase(root)
+	switch s {
+	case "C", "Db", "D", "Eb", "E", "F", "F#", "Gb", "G", "Ab", "A", "Bb", "B":
+		return s
+	default:
+		return ""
+	}
+}
+
+func normalizeMinorKeyRoot(root string) string {
+	s := normalizeKeyRootCase(root)
+	switch s {
+	case "C", "C#", "D", "Eb", "E", "F", "F#", "G", "G#", "A", "Bb", "B":
+		return s
+	default:
+		return ""
+	}
+}
+
+func normalizeKeyRootCase(root string) string {
+	s := strings.TrimSpace(root)
+	if s == "" {
+		return ""
+	}
+	if len(s) >= 1 {
+		s = strings.ToUpper(s[:1]) + strings.ToLower(s[1:])
+	}
+	return s
+}
+
 func applyPlaylistMetadataOverrides(meta map[string]any, cfg config.MetadataConfig, playlistName string, position int) {
 	if cfg.RenumberPlaylistTracks && position > 0 {
 		meta["track_number"] = position

internal/app/app_test.go

@@ -864,6 +864,41 @@ func TestBuildTagMetadataReplayGainFallbacks(t *testing.T) {
 	}
 }
 
+func TestBuildTagMetadataInitialKey(t *testing.T) {
+	meta := map[string]any{
+		"key":       "E Minor",
+		"album":     map[string]any{"title": "Album"},
+		"performer": map[string]any{"name": "Artist"},
+	}
+
+	tags := buildTagMetadata(meta, "Song", "beatport", "42", ripTrackOptions{})
+	if tags.InitialKey != "Em" {
+		t.Fatalf("InitialKey=%q", tags.InitialKey)
+	}
+}
+
+func TestNormalizeInitialKey(t *testing.T) {
+	tests := map[string]string{
+		"C Major":   "C",
+		"Db Major":  "Db",
+		"F# Major":  "F#",
+		"E Minor":   "Em",
+		"C# Minor":  "C#m",
+		"Bb Minor":  "Bbm",
+		"g# minor":  "G#m",
+		"F#m":       "F#m",
+		"Ab":        "Ab",
+		"Not A Key": "Not A Key",
+		"C# Major":  "C# Major",
+		"Db Minor":  "Db Minor",
+	}
+	for input, want := range tests {
+		if got := normalizeInitialKey(input); got != want {
+			t.Fatalf("normalizeInitialKey(%q)=%q want %q", input, got, want)
+		}
+	}
+}
+
 func TestBuildTagMetadataReplayGainFallsBackToDeezerGain(t *testing.T) {
 	meta := map[string]any{
 		"gain":      float64(-10),

internal/audio/tag/tagger.go

@@ -21,6 +21,7 @@ type Metadata struct {
 	DiscTotal           int
 	Date                string
 	Genre               string
+	InitialKey          string
 	Comment             string
 	Description         string
 	Lyrics              string
@@ -160,6 +161,7 @@ func toTags(meta Metadata) map[string]string {
 		"album_artist":          meta.AlbumArtist,
 		"date":                  meta.Date,
 		"genre":                 meta.Genre,
+		"INITIALKEY":            meta.InitialKey,
 		"comment":               meta.Comment,
 		"description":           meta.Description,
 		"lyrics":                meta.Lyrics,

internal/audio/tag/tagger_test.go

@@ -30,6 +30,7 @@ func TestToTagsTotalsAndSourceFields(t *testing.T) {
 		DiscNumber:          1,
 		DiscTotal:           2,
 		ISRC:                "USABC1234567",
+		InitialKey:          "Em",
 		ReplaygainTrackGain: "-7.25 dB",
 		ReplaygainAlbumGain: "-8.1 dB",
 		ReplaygainTrackPeak: "0.989",
@@ -49,6 +50,9 @@ func TestToTagsTotalsAndSourceFields(t *testing.T) {
 	if tags["isrc"] != "USABC1234567" {
 		t.Fatalf("isrc missing: %+v", tags)
 	}
+	if tags["INITIALKEY"] != "Em" {
+		t.Fatalf("INITIALKEY missing: %+v", tags)
+	}
 	if tags["source_platform"] != "QOBUZ" || tags["source_track_id"] != "t1" {
 		t.Fatalf("source tags missing: %+v", tags)
 	}

internal/config/config.go

@@ -25,6 +25,7 @@ type ConfigData struct {
 	Tidal        TidalConfig                  `toml:"tidal"`
 	Deezer       DeezerConfig                 `toml:"deezer"`
 	Yandex       YandexConfig                 `toml:"yandex"`
+	Beatport     BeatportConfig               `toml:"beatport"`
 	Soundcloud   SoundcloudConfig             `toml:"soundcloud"`
 	Youtube      YoutubeConfig                `toml:"youtube"`
 	Database     DatabaseConfig               `toml:"database"`
@@ -84,6 +85,16 @@ type YandexConfig struct {
 	UserID      string `toml:"user_id"`
 }
 
+type BeatportConfig struct {
+	Quality                 int    `toml:"quality"`
+	VariousArtistsThreshold int    `toml:"various_artists_threshold"`
+	Username                string `toml:"username"`
+	Password                string `toml:"password"`
+	AccessToken             string `toml:"access_token"`
+	RefreshToken            string `toml:"refresh_token"`
+	TokenExpiry             int64  `toml:"token_expiry"`
+}
+
 type SoundcloudConfig struct {
 	Quality    int    `toml:"quality"`
 	ClientID   string `toml:"client_id"`
@@ -250,6 +261,10 @@ func DefaultConfigData() ConfigData {
 		Yandex: YandexConfig{
 			Quality: 2,
 		},
+		Beatport: BeatportConfig{
+			Quality:                 3,
+			VariousArtistsThreshold: 3,
+		},
 		Soundcloud: SoundcloudConfig{
 			Quality: 0,
 		},

internal/provider/beatport/client.go

@@ -0,0 +1,739 @@
+package beatport
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"streamrip-go/internal/config"
+	"streamrip-go/internal/jsonutil"
+	"streamrip-go/internal/netutil"
+	"streamrip-go/internal/provider"
+	"streamrip-go/internal/ratelimit"
+)
+
+const (
+	baseURL       = "https://api.beatport.com/v4"
+	clientID      = "ryZ8LuyQVPqbK2mBX2Hwt4qSMtnWuTYSqBPO92yQ"
+	tokenEndpoint = "/auth/o/token/"
+	authEndpoint  = "/auth/o/authorize/"
+	loginEndpoint = "/auth/login/"
+)
+
+var (
+	errMissingCredentials = errors.New("missing beatport credentials")
+	errNotLoggedIn        = errors.New("beatport client not logged in")
+)
+
+type Client struct {
+	cfg       *config.Config
+	http      *http.Client
+	limiter   *ratelimit.Limiter
+	baseURL   string
+	loggedIn  bool
+	sessionID string
+}
+
+func New(cfg *config.Config) *Client {
+	h := netutil.NewHTTPClient(40*time.Second, cfg.Session.Downloads.VerifySSL, cfg.Session.Downloads.MaxConnections)
+	h.CheckRedirect = func(*http.Request, []*http.Request) error { return http.ErrUseLastResponse }
+	return &Client{
+		cfg:     cfg,
+		http:    h,
+		limiter: ratelimit.New(cfg.Session.Downloads.RequestsPerMinute),
+		baseURL: baseURL,
+	}
+}
+
+func (c *Client) Source() string { return "beatport" }
+
+func (c *Client) LoggedIn() bool { return c.loggedIn }
+
+func (c *Client) Login(ctx context.Context) error {
+	b := &c.cfg.Session.Beatport
+	b.Username = strings.TrimSpace(b.Username)
+	b.Password = strings.TrimSpace(b.Password)
+	if b.Username == "" || b.Password == "" {
+		return errMissingCredentials
+	}
+	if strings.TrimSpace(b.AccessToken) != "" && time.Now().Unix()+300 < b.TokenExpiry {
+		c.loggedIn = true
+		return nil
+	}
+	if strings.TrimSpace(b.RefreshToken) != "" {
+		if err := c.refresh(ctx); err == nil {
+			c.loggedIn = true
+			return nil
+		}
+	}
+	if err := c.loginPasswordFlow(ctx); err != nil {
+		return err
+	}
+	c.loggedIn = true
+	return nil
+}
+
+func (c *Client) GetMetadata(ctx context.Context, item, mediaType string) (map[string]any, error) {
+	if !c.loggedIn {
+		return nil, errNotLoggedIn
+	}
+	switch mediaType {
+	case "track":
+		track, err := c.getMap(ctx, "/catalog/tracks/"+url.PathEscape(strings.TrimSpace(item))+"/", nil)
+		if err != nil {
+			return nil, err
+		}
+		if relID := jsonutil.NestedString(track, "release", "id"); relID != "" {
+			if rel, relErr := c.getRelease(ctx, relID); relErr == nil {
+				track["release"] = rel
+			}
+		}
+		return c.normalizeTrack(track), nil
+	case "album":
+		return c.getAlbumMetadata(ctx, item)
+	case "playlist":
+		return c.getPlaylistMetadata(ctx, item)
+	case "chart":
+		return c.getChartMetadata(ctx, strings.TrimPrefix(strings.TrimSpace(item), "chart:"))
+	case "artist":
+		artist, err := c.getMap(ctx, "/catalog/artists/"+url.PathEscape(strings.TrimSpace(item))+"/", nil)
+		if err != nil {
+			return nil, err
+		}
+		releases, err := c.getPaginated(ctx, "/catalog/releases/", url.Values{"artist_id": []string{strings.TrimSpace(item)}})
+		if err != nil {
+			return nil, err
+		}
+		return c.releaseCollectionMetadata(artist, releases), nil
+	case "label":
+		label, err := c.getMap(ctx, "/catalog/labels/"+url.PathEscape(strings.TrimSpace(item))+"/", nil)
+		if err != nil {
+			return nil, err
+		}
+		tracks, err := c.getTrackCollection(ctx, url.Values{"label_id": []string{strings.TrimSpace(item)}})
+		if err != nil {
+			return nil, err
+		}
+		return collectionMetadata(label, tracks), nil
+	default:
+		return nil, fmt.Errorf("unsupported beatport media type %q", mediaType)
+	}
+}
+
+func (c *Client) Search(ctx context.Context, mediaType, query string, limit int) ([]map[string]any, error) {
+	if !c.loggedIn {
+		return nil, errNotLoggedIn
+	}
+	if limit <= 0 {
+		limit = 25
+	}
+	var key string
+	switch mediaType {
+	case "track":
+		key = "tracks"
+	case "album":
+		key = "releases"
+	case "label":
+		key = "labels"
+	default:
+		return nil, fmt.Errorf("unsupported beatport search media type %q", mediaType)
+	}
+	params := url.Values{}
+	params.Set("q", query)
+	params.Set("order_by", "-publish_date")
+	params.Set("is_available_for_streaming", "true")
+	resp, err := c.getMap(ctx, "/catalog/search/", params)
+	if err != nil {
+		return nil, err
+	}
+	items := sliceAny(resp[key])
+	if limit < len(items) {
+		items = items[:limit]
+	}
+	return []map[string]any{{"items": c.normalizeSearchItems(mediaType, items)}}, nil
+}
+
+func (c *Client) GetDownloadable(ctx context.Context, item string, quality int) (*provider.Downloadable, error) {
+	if !c.loggedIn {
+		return nil, errNotLoggedIn
+	}
+	q := beatportQuality(quality)
+	params := url.Values{"quality": []string{q}}
+	resp, err := c.getMap(ctx, "/catalog/tracks/"+url.PathEscape(strings.TrimSpace(item))+"/download/", params)
+	if err != nil {
+		return nil, err
+	}
+	location := strings.TrimSpace(jsonutil.StringFromAny(resp["location"]))
+	if location == "" {
+		return nil, errors.New("beatport download response missing location")
+	}
+	streamQuality := strings.TrimSpace(jsonutil.StringFromAny(resp["stream_quality"]))
+	profile, ext := audioProfile(q, streamQuality)
+	return &provider.Downloadable{URL: location, Extension: ext, Source: "beatport", TrackID: strings.TrimSpace(item), Audio: profile}, nil
+}
+
+func (c *Client) Close() error { return nil }
+
+func (c *Client) getAlbumMetadata(ctx context.Context, id string) (map[string]any, error) {
+	release, err := c.getRelease(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	tracks, err := c.getReleaseTracks(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	return c.normalizeRelease(release, tracks), nil
+}
+
+func (c *Client) getPlaylistMetadata(ctx context.Context, id string) (map[string]any, error) {
+	if strings.HasPrefix(strings.TrimSpace(id), "chart:") {
+		return c.getChartMetadata(ctx, strings.TrimPrefix(strings.TrimSpace(id), "chart:"))
+	}
+	playlist, err := c.getMap(ctx, "/catalog/playlists/"+url.PathEscape(strings.TrimSpace(id))+"/", nil)
+	if err != nil {
+		return nil, err
+	}
+	items, err := c.getPaginated(ctx, "/catalog/playlists/"+url.PathEscape(strings.TrimSpace(id))+"/tracks/", nil)
+	if err != nil {
+		return nil, err
+	}
+	tracks := make([]any, 0, len(items))
+	for _, raw := range items {
+		m, ok := raw.(map[string]any)
+		if !ok {
+			continue
+		}
+		if track, ok := m["track"].(map[string]any); ok {
+			tracks = append(tracks, normalizeTrackListItem(track))
+		}
+	}
+	return playlistMetadata(playlist, tracks), nil
+}
+
+func (c *Client) getChartMetadata(ctx context.Context, id string) (map[string]any, error) {
+	chart, err := c.getMap(ctx, "/catalog/charts/"+url.PathEscape(strings.TrimSpace(id))+"/", nil)
+	if err != nil {
+		return nil, err
+	}
+	tracks, err := c.getPaginated(ctx, "/catalog/charts/"+url.PathEscape(strings.TrimSpace(id))+"/tracks/", nil)
+	if err != nil {
+		return nil, err
+	}
+	normalized := make([]any, 0, len(tracks))
+	for _, raw := range tracks {
+		if track, ok := raw.(map[string]any); ok {
+			normalized = append(normalized, normalizeTrackListItem(track))
+		}
+	}
+	return playlistMetadata(chart, normalized), nil
+}
+
+func (c *Client) getRelease(ctx context.Context, id string) (map[string]any, error) {
+	return c.getMap(ctx, "/catalog/releases/"+url.PathEscape(strings.TrimSpace(id))+"/", nil)
+}
+
+func (c *Client) getReleaseTracks(ctx context.Context, id string) ([]any, error) {
+	items, err := c.getPaginated(ctx, "/catalog/releases/"+url.PathEscape(strings.TrimSpace(id))+"/tracks/", nil)
+	if err != nil {
+		return nil, err
+	}
+	for _, raw := range items {
+		if track, ok := raw.(map[string]any); ok {
+			track["release"] = map[string]any{"id": id}
+		}
+	}
+	return items, nil
+}
+
+func (c *Client) getTrackCollection(ctx context.Context, params url.Values) ([]any, error) {
+	return c.getPaginated(ctx, "/catalog/tracks/", params)
+}
+
+func (c *Client) getPaginated(ctx context.Context, endpoint string, params url.Values) ([]any, error) {
+	if params == nil {
+		params = url.Values{}
+	} else {
+		params = cloneValues(params)
+	}
+	out := make([]any, 0)
+	for page := 1; ; page++ {
+		params.Set("page", strconv.Itoa(page))
+		resp, err := c.getMap(ctx, endpoint, params)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, sliceAny(resp["results"])...)
+		if strings.TrimSpace(jsonutil.StringFromAny(resp["next"])) == "" {
+			break
+		}
+	}
+	return out, nil
+}
+
+func (c *Client) getMap(ctx context.Context, endpoint string, params url.Values) (map[string]any, error) {
+	resp, err := c.apiRequest(ctx, http.MethodGet, endpoint, params, nil, "")
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}
+
+func (c *Client) apiRequest(ctx context.Context, method, endpoint string, params url.Values, payload any, contentType string) (map[string]any, error) {
+	if err := c.ensureToken(ctx); err != nil {
+		return nil, err
+	}
+	resp, status, err := c.rawRequest(ctx, method, endpoint, params, payload, contentType, true)
+	if err != nil {
+		return nil, err
+	}
+	if status == http.StatusUnauthorized {
+		c.cfg.Session.Beatport.TokenExpiry = 0
+		if err = c.refresh(ctx); err != nil {
+			if loginErr := c.loginPasswordFlow(ctx); loginErr != nil {
+				return nil, err
+			}
+		}
+		resp, status, err = c.rawRequest(ctx, method, endpoint, params, payload, contentType, true)
+		if err != nil {
+			return nil, err
+		}
+	}
+	if status < 200 || status >= 300 {
+		return nil, fmt.Errorf("beatport request failed: status=%d body=%v", status, resp)
+	}
+	return resp, nil
+}
+
+func (c *Client) ensureToken(ctx context.Context) error {
+	if strings.TrimSpace(c.cfg.Session.Beatport.AccessToken) != "" && time.Now().Unix()+300 < c.cfg.Session.Beatport.TokenExpiry {
+		return nil
+	}
+	if strings.TrimSpace(c.cfg.Session.Beatport.RefreshToken) != "" {
+		if err := c.refresh(ctx); err == nil {
+			return nil
+		}
+	}
+	return c.loginPasswordFlow(ctx)
+}
+
+func (c *Client) loginPasswordFlow(ctx context.Context) error {
+	b := &c.cfg.Session.Beatport
+	if strings.TrimSpace(b.Username) == "" || strings.TrimSpace(b.Password) == "" {
+		return errMissingCredentials
+	}
+	loginResp, status, err := c.rawRequest(ctx, http.MethodPost, loginEndpoint, nil, map[string]string{"username": b.Username, "password": b.Password}, "application/json", false)
+	if err != nil {
+		return err
+	}
+	if status < 200 || status >= 300 {
+		return fmt.Errorf("beatport login failed: status=%d body=%v", status, loginResp)
+	}
+	if c.sessionID == "" {
+		return errors.New("beatport login response missing sessionid cookie")
+	}
+	code, err := c.authorize(ctx)
+	if err != nil {
+		return err
+	}
+	return c.issueToken(ctx, map[string]string{"client_id": clientID, "grant_type": "authorization_code", "code": code})
+}
+
+func (c *Client) authorize(ctx context.Context) (string, error) {
+	params := url.Values{"client_id": []string{clientID}, "response_type": []string{"code"}}
+	resp, status, err := c.rawRequest(ctx, http.MethodGet, authEndpoint, params, nil, "", false)
+	if err != nil {
+		return "", err
+	}
+	if status != http.StatusFound {
+		return "", fmt.Errorf("beatport authorize failed: status=%d body=%v", status, resp)
+	}
+	code := strings.TrimSpace(jsonutil.StringFromAny(resp["code"]))
+	if code == "" {
+		return "", errors.New("beatport authorize redirect missing code")
+	}
+	return code, nil
+}
+
+func (c *Client) refresh(ctx context.Context) error {
+	b := &c.cfg.Session.Beatport
+	return c.issueToken(ctx, map[string]string{"client_id": clientID, "grant_type": "refresh_token", "refresh_token": b.RefreshToken})
+}
+
+func (c *Client) issueToken(ctx context.Context, payload map[string]string) error {
+	resp, status, err := c.rawRequest(ctx, http.MethodPost, tokenEndpoint, nil, payload, "application/x-www-form-urlencoded", false)
+	if err != nil {
+		return err
+	}
+	if status < 200 || status >= 300 {
+		return fmt.Errorf("beatport token request failed: status=%d body=%v", status, resp)
+	}
+	access := strings.TrimSpace(jsonutil.StringFromAny(resp["access_token"]))
+	refresh := strings.TrimSpace(jsonutil.StringFromAny(resp["refresh_token"]))
+	if access == "" {
+		return errors.New("beatport token response missing access_token")
+	}
+	expiresIn := int64(jsonutil.IntFromAny(resp["expires_in"]))
+	if expiresIn <= 0 {
+		expiresIn = 3600
+	}
+	c.cfg.Session.Beatport.AccessToken = access
+	if refresh != "" {
+		c.cfg.Session.Beatport.RefreshToken = refresh
+	}
+	c.cfg.Session.Beatport.TokenExpiry = time.Now().Unix() + expiresIn
+	c.cfg.File.Beatport.AccessToken = c.cfg.Session.Beatport.AccessToken
+	c.cfg.File.Beatport.RefreshToken = c.cfg.Session.Beatport.RefreshToken
+	c.cfg.File.Beatport.TokenExpiry = c.cfg.Session.Beatport.TokenExpiry
+	_ = c.cfg.SaveFile()
+	return nil
+}
+
+func (c *Client) rawRequest(ctx context.Context, method, endpoint string, params url.Values, payload any, contentType string, auth bool) (map[string]any, int, error) {
+	if c.limiter != nil {
+		if err := c.limiter.Wait(ctx); err != nil {
+			return nil, 0, err
+		}
+	}
+	var body io.Reader
+	if payload != nil {
+		switch contentType {
+		case "application/json":
+			b, err := json.Marshal(payload)
+			if err != nil {
+				return nil, 0, err
+			}
+			body = bytes.NewReader(b)
+		case "application/x-www-form-urlencoded":
+			vals := url.Values{}
+			for k, v := range payload.(map[string]string) {
+				vals.Set(k, v)
+			}
+			body = strings.NewReader(vals.Encode())
+		default:
+			return nil, 0, fmt.Errorf("unsupported beatport content type %q", contentType)
+		}
+	}
+	u, err := url.Parse(strings.TrimRight(c.baseURL, "/") + endpoint)
+	if err != nil {
+		return nil, 0, err
+	}
+	if len(params) > 0 {
+		u.RawQuery = params.Encode()
+	}
+	req, err := http.NewRequestWithContext(ctx, method, u.String(), body)
+	if err != nil {
+		return nil, 0, err
+	}
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36")
+	if contentType != "" {
+		req.Header.Set("Content-Type", contentType)
+	}
+	if auth && strings.TrimSpace(c.cfg.Session.Beatport.AccessToken) != "" {
+		req.Header.Set("Authorization", "Bearer "+strings.TrimSpace(c.cfg.Session.Beatport.AccessToken))
+	}
+	if endpoint == authEndpoint && c.sessionID != "" {
+		req.Header.Set("Cookie", "sessionid="+c.sessionID)
+	}
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return nil, 0, err
+	}
+	defer func() { _ = resp.Body.Close() }()
+	if endpoint == loginEndpoint {
+		for _, cookie := range resp.Cookies() {
+			if cookie.Name == "sessionid" {
+				c.sessionID = cookie.Value
+				break
+			}
+		}
+	}
+	if endpoint == authEndpoint && resp.StatusCode == http.StatusFound {
+		loc := resp.Header.Get("Location")
+		parsed, parseErr := url.Parse(loc)
+		if parseErr == nil && strings.TrimSpace(parsed.Query().Get("code")) != "" {
+			return map[string]any{"code": parsed.Query().Get("code")}, resp.StatusCode, nil
+		}
+		return map[string]any{}, resp.StatusCode, nil
+	}
+	var out map[string]any
+	if err = json.NewDecoder(resp.Body).Decode(&out); err != nil {
+		if errors.Is(err, io.EOF) {
+			return map[string]any{}, resp.StatusCode, nil
+		}
+		if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+			return nil, resp.StatusCode, err
+		}
+		return map[string]any{}, resp.StatusCode, nil
+	}
+	return out, resp.StatusCode, nil
+}
+
+func (c *Client) normalizeRelease(raw map[string]any, tracks []any) map[string]any {
+	id := jsonutil.StringFromAny(raw["id"])
+	artist := c.releaseArtistName(raw["artists"])
+	items := make([]any, 0, len(tracks))
+	for _, entry := range tracks {
+		track, ok := entry.(map[string]any)
+		if !ok {
+			continue
+		}
+		track["release"] = raw
+		items = append(items, c.normalizeTrack(track))
+	}
+	return map[string]any{
+		"id":                    id,
+		"title":                 jsonutil.StringFromAny(raw["name"]),
+		"artist":                map[string]any{"name": artist},
+		"release_date_original": jsonutil.StringFromAny(raw["new_release_date"]),
+		"tracks_count":          firstPositiveInt(jsonutil.IntFromAny(raw["track_count"]), len(items)),
+		"maximum_bit_depth":     16,
+		"maximum_sampling_rate": "44.1",
+		"image":                 imageMap(raw["image"]),
+		"tracks":                map[string]any{"items": items},
+		"upc":                   jsonutil.StringFromAny(raw["upc"]),
+		"label":                 raw["label"],
+	}
+}
+
+func (c *Client) normalizeTrack(raw map[string]any) map[string]any {
+	release := mapAny(raw["release"])
+	artistName := joinArtists(raw["artists"])
+	artistID := firstArtistID(raw["artists"])
+	albumArtist := c.releaseArtistName(release["artists"])
+	if albumArtist == "" {
+		albumArtist = artistName
+	}
+	genreName := jsonutil.NestedString(raw, "genre", "name")
+	if sub := jsonutil.NestedString(raw, "sub_genre", "name"); sub != "" {
+		genreName = sub
+	}
+	date := jsonutil.FirstNonEmpty(jsonutil.StringFromAny(release["new_release_date"]), jsonutil.StringFromAny(raw["publish_date"]))
+	track := map[string]any{
+		"id":                    jsonutil.StringFromAny(raw["id"]),
+		"title":                 jsonutil.StringFromAny(raw["name"]),
+		"version":               jsonutil.StringFromAny(raw["mix_name"]),
+		"artist":                map[string]any{"id": artistID, "name": artistName},
+		"performer":             map[string]any{"id": artistID, "name": artistName},
+		"album":                 map[string]any{"id": jsonutil.StringFromAny(release["id"]), "title": jsonutil.StringFromAny(release["name"]), "artist": map[string]any{"name": albumArtist}, "image": imageMap(release["image"]), "release_date_original": date},
+		"track_number":          jsonutil.IntFromAny(raw["number"]),
+		"tracks_count":          jsonutil.IntFromAny(release["track_count"]),
+		"release_date_original": date,
+		"genre":                 map[string]any{"name": genreName},
+		"isrc":                  jsonutil.StringFromAny(raw["isrc"]),
+		"bpm":                   jsonutil.IntFromAny(raw["bpm"]),
+		"source_track_id":       jsonutil.StringFromAny(raw["id"]),
+		"source_album_id":       jsonutil.StringFromAny(release["id"]),
+		"source_artist_id":      artistID,
+		"maximum_bit_depth":     16,
+		"maximum_sampling_rate": "44.1",
+	}
+	if keyName := jsonutil.NestedString(raw, "key", "name"); keyName != "" {
+		track["key"] = keyName
+	}
+	return track
+}
+
+func normalizeTrackListItem(raw map[string]any) map[string]any {
+	return map[string]any{
+		"id":           jsonutil.StringFromAny(raw["id"]),
+		"title":        jsonutil.StringFromAny(raw["name"]),
+		"version":      jsonutil.StringFromAny(raw["mix_name"]),
+		"artist":       map[string]any{"name": joinArtists(raw["artists"])},
+		"album":        map[string]any{"id": jsonutil.NestedString(raw, "release", "id"), "title": jsonutil.NestedString(raw, "release", "name")},
+		"track_number": jsonutil.IntFromAny(raw["number"]),
+	}
+}
+
+func collectionMetadata(raw map[string]any, tracks []any) map[string]any {
+	items := make([]any, 0, len(tracks))
+	for _, entry := range tracks {
+		track, ok := entry.(map[string]any)
+		if !ok {
+			continue
+		}
+		items = append(items, normalizeTrackListItem(track))
+	}
+	return map[string]any{
+		"id":           jsonutil.StringFromAny(raw["id"]),
+		"name":         jsonutil.StringFromAny(raw["name"]),
+		"title":        jsonutil.StringFromAny(raw["name"]),
+		"tracks_count": len(items),
+		"tracks":       map[string]any{"items": items},
+	}
+}
+
+func (c *Client) releaseCollectionMetadata(raw map[string]any, releases []any) map[string]any {
+	items := make([]any, 0, len(releases))
+	for _, entry := range releases {
+		release, ok := entry.(map[string]any)
+		if !ok {
+			continue
+		}
+		id := strings.TrimSpace(jsonutil.StringFromAny(release["id"]))
+		if id == "" {
+			continue
+		}
+		items = append(items, map[string]any{
+			"id":                    id,
+			"title":                 jsonutil.StringFromAny(release["name"]),
+			"artist":                map[string]any{"name": c.releaseArtistName(release["artists"])},
+			"tracks_count":          jsonutil.IntFromAny(release["track_count"]),
+			"release_date_original": jsonutil.StringFromAny(release["new_release_date"]),
+		})
+	}
+	return map[string]any{
+		"id":     jsonutil.StringFromAny(raw["id"]),
+		"name":   jsonutil.StringFromAny(raw["name"]),
+		"title":  jsonutil.StringFromAny(raw["name"]),
+		"albums": map[string]any{"items": items},
+	}
+}
+
+func playlistMetadata(raw map[string]any, tracks []any) map[string]any {
+	name := jsonutil.StringFromAny(raw["name"])
+	return map[string]any{
+		"id":           jsonutil.StringFromAny(raw["id"]),
+		"name":         name,
+		"title":        name,
+		"tracks_count": firstPositiveInt(jsonutil.IntFromAny(raw["track_count"]), len(tracks)),
+		"image":        imageMap(raw["image"]),
+		"tracks":       map[string]any{"items": tracks},
+	}
+}
+
+func (c *Client) normalizeSearchItems(mediaType string, items []any) []any {
+	out := make([]any, 0, len(items))
+	for _, raw := range items {
+		m, ok := raw.(map[string]any)
+		if !ok {
+			continue
+		}
+		switch mediaType {
+		case "track":
+			out = append(out, normalizeTrackListItem(m))
+		case "album":
+			out = append(out, map[string]any{"id": jsonutil.StringFromAny(m["id"]), "title": jsonutil.StringFromAny(m["name"]), "artist": map[string]any{"name": c.releaseArtistName(m["artists"])}, "tracks_count": jsonutil.IntFromAny(m["track_count"]), "release_date_original": jsonutil.StringFromAny(m["new_release_date"])})
+		case "label":
+			out = append(out, map[string]any{"id": jsonutil.StringFromAny(m["id"]), "title": jsonutil.StringFromAny(m["name"]), "name": jsonutil.StringFromAny(m["name"])})
+		}
+	}
+	return out
+}
+
+func beatportQuality(q int) string {
+	switch q {
+	case 1:
+		return "medium"
+	case 2:
+		return "high"
+	default:
+		return "lossless"
+	}
+}
+
+func audioProfile(quality, streamQuality string) (provider.AudioProfile, string) {
+	s := strings.ToLower(strings.TrimSpace(streamQuality))
+	switch {
+	case strings.Contains(s, "flac") || quality == "lossless":
+		return provider.AudioProfile{Container: "FLAC", Codec: "FLAC", Quality: "LOSSLESS", BitDepth: 16, SamplingRate: "44.1"}, "flac"
+	case strings.Contains(s, "256") || quality == "high":
+		return provider.AudioProfile{Container: "M4A", Codec: "AACLC", Quality: "HIGH", BitDepth: 16, SamplingRate: "44.1", BitrateKbps: 256}, "m4a"
+	default:
+		return provider.AudioProfile{Container: "M4A", Codec: "AACLC", Quality: "LOW", BitDepth: 16, SamplingRate: "44.1", BitrateKbps: 128}, "m4a"
+	}
+}
+
+func joinArtists(v any) string {
+	items := sliceAny(v)
+	names := make([]string, 0, len(items))
+	for _, raw := range items {
+		m, ok := raw.(map[string]any)
+		if !ok {
+			continue
+		}
+		if name := strings.TrimSpace(jsonutil.StringFromAny(m["name"])); name != "" {
+			names = append(names, name)
+		}
+	}
+	return strings.Join(names, ", ")
+}
+
+func (c *Client) releaseArtistName(v any) string {
+	items := sliceAny(v)
+	threshold := c.cfg.Session.Beatport.VariousArtistsThreshold
+	if threshold >= 0 && len(items) > threshold {
+		return "Various Artists"
+	}
+	return joinArtists(v)
+}
+
+func firstArtistID(v any) string {
+	items := sliceAny(v)
+	if len(items) == 0 {
+		return ""
+	}
+	m, _ := items[0].(map[string]any)
+	return jsonutil.StringFromAny(m["id"])
+}
+
+func imageMap(v any) map[string]any {
+	m := mapAny(v)
+	dynamic := strings.TrimSpace(jsonutil.StringFromAny(m["dynamic_uri"]))
+	uri := strings.TrimSpace(jsonutil.StringFromAny(m["uri"]))
+	if dynamic != "" {
+		return map[string]any{
+			"original":   strings.ReplaceAll(dynamic, "{w}x{h}", "1400x1400"),
+			"extralarge": strings.ReplaceAll(dynamic, "{w}x{h}", "1000x1000"),
+			"large":      strings.ReplaceAll(dynamic, "{w}x{h}", "500x500"),
+			"small":      strings.ReplaceAll(dynamic, "{w}x{h}", "250x250"),
+			"thumbnail":  strings.ReplaceAll(dynamic, "{w}x{h}", "100x100"),
+		}
+	}
+	if uri != "" {
+		return map[string]any{"original": uri, "large": uri}
+	}
+	return nil
+}
+
+func mapAny(v any) map[string]any {
+	m, _ := v.(map[string]any)
+	if m == nil {
+		return map[string]any{}
+	}
+	return m
+}
+
+func sliceAny(v any) []any {
+	s, ok := v.([]any)
+	if !ok {
+		return nil
+	}
+	return s
+}
+
+func firstPositiveInt(vals ...int) int {
+	for _, v := range vals {
+		if v > 0 {
+			return v
+		}
+	}
+	return 0
+}
+
+func cloneValues(in url.Values) url.Values {
+	out := url.Values{}
+	for k, vals := range in {
+		out[k] = append([]string(nil), vals...)
+	}
+	return out
+}

internal/provider/beatport/client_test.go

@@ -0,0 +1,212 @@
+package beatport
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"streamrip-go/internal/config"
+)
+
+func newTestClient(t *testing.T, handler http.Handler) (*Client, func()) {
+	t.Helper()
+	ts := httptest.NewServer(handler)
+	cfg := &config.Config{Session: config.DefaultConfigData(), File: config.DefaultConfigData()}
+	cfg.Session.Beatport.Username = "user"
+	cfg.Session.Beatport.Password = "pass"
+	cfg.Session.Beatport.AccessToken = "token"
+	cfg.Session.Beatport.TokenExpiry = time.Now().Add(time.Hour).Unix()
+	c := New(cfg)
+	c.baseURL = ts.URL
+	c.http = ts.Client()
+	c.loggedIn = true
+	return c, ts.Close
+}
+
+func writeJSON(t *testing.T, w http.ResponseWriter, v any) {
+	t.Helper()
+	w.Header().Set("Content-Type", "application/json")
+	if err := json.NewEncoder(w).Encode(v); err != nil {
+		t.Fatalf("encode json: %v", err)
+	}
+}
+
+func TestGetDownloadableMapsQuality(t *testing.T) {
+	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/catalog/tracks/42/download/" {
+			t.Fatalf("path = %q", r.URL.Path)
+		}
+		if got := r.URL.Query().Get("quality"); got != "high" {
+			t.Fatalf("quality = %q, want high", got)
+		}
+		writeJSON(t, w, map[string]any{"location": "https://cdn.example/42.m4a", "stream_quality": ".256k.aac.mp4"})
+	}))
+	defer closeServer()
+
+	d, err := c.GetDownloadable(context.Background(), "42", 2)
+	if err != nil {
+		t.Fatalf("GetDownloadable() error = %v", err)
+	}
+	if d.URL != "https://cdn.example/42.m4a" || d.Extension != "m4a" || d.Audio.BitrateKbps != 256 || d.Audio.Quality != "HIGH" {
+		t.Fatalf("unexpected downloadable: %+v", d)
+	}
+}
+
+func TestAlbumMetadataNormalizesReleaseTracks(t *testing.T) {
+	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/catalog/releases/7/":
+			writeJSON(t, w, map[string]any{
+				"id":               7,
+				"name":             "Release Name",
+				"new_release_date": "2024-01-02",
+				"track_count":      1,
+				"artists":          []any{map[string]any{"id": 10, "name": "Album Artist"}},
+				"image":            map[string]any{"dynamic_uri": "https://img.example/{w}x{h}.jpg"},
+			})
+		case "/catalog/releases/7/tracks/":
+			writeJSON(t, w, map[string]any{
+				"next": nil,
+				"results": []any{map[string]any{
+					"id":       42,
+					"name":     "Track Name",
+					"mix_name": "Original Mix",
+					"number":   1,
+					"artists":  []any{map[string]any{"id": 11, "name": "Track Artist"}},
+					"genre":    map[string]any{"name": "House"},
+					"isrc":     "USABC1234567",
+				}},
+			})
+		default:
+			t.Fatalf("unexpected path %q", r.URL.Path)
+		}
+	}))
+	defer closeServer()
+
+	meta, err := c.GetMetadata(context.Background(), "7", "album")
+	if err != nil {
+		t.Fatalf("GetMetadata() error = %v", err)
+	}
+	if meta["title"] != "Release Name" || meta["release_date_original"] != "2024-01-02" {
+		t.Fatalf("unexpected album meta: %+v", meta)
+	}
+	tracks := meta["tracks"].(map[string]any)["items"].([]any)
+	if len(tracks) != 1 {
+		t.Fatalf("tracks len = %d", len(tracks))
+	}
+	track := tracks[0].(map[string]any)
+	if track["id"] != "42" || track["title"] != "Track Name" || track["version"] != "Original Mix" {
+		t.Fatalf("unexpected track meta: %+v", track)
+	}
+	album := track["album"].(map[string]any)
+	if album["title"] != "Release Name" {
+		t.Fatalf("unexpected track album: %+v", album)
+	}
+}
+
+func TestAlbumMetadataCollapsesManyReleaseArtists(t *testing.T) {
+	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/catalog/releases/7/":
+			writeJSON(t, w, map[string]any{
+				"id":          7,
+				"name":        "Compilation",
+				"track_count": 1,
+				"artists": []any{
+					map[string]any{"id": 1, "name": "A"},
+					map[string]any{"id": 2, "name": "B"},
+					map[string]any{"id": 3, "name": "C"},
+					map[string]any{"id": 4, "name": "D"},
+				},
+			})
+		case "/catalog/releases/7/tracks/":
+			writeJSON(t, w, map[string]any{
+				"next": nil,
+				"results": []any{map[string]any{
+					"id":      42,
+					"name":    "Track Name",
+					"number":  1,
+					"artists": []any{map[string]any{"id": 1, "name": "A"}},
+				}},
+			})
+		default:
+			t.Fatalf("unexpected path %q", r.URL.Path)
+		}
+	}))
+	defer closeServer()
+
+	meta, err := c.GetMetadata(context.Background(), "7", "album")
+	if err != nil {
+		t.Fatalf("GetMetadata() error = %v", err)
+	}
+	artist := meta["artist"].(map[string]any)
+	if artist["name"] != "Various Artists" {
+		t.Fatalf("album artist = %q, want Various Artists", artist["name"])
+	}
+	track := meta["tracks"].(map[string]any)["items"].([]any)[0].(map[string]any)
+	album := track["album"].(map[string]any)
+	albumArtist := album["artist"].(map[string]any)
+	if albumArtist["name"] != "Various Artists" {
+		t.Fatalf("track album artist = %q, want Various Artists", albumArtist["name"])
+	}
+}
+
+func TestReleaseArtistCollapseCanBeDisabled(t *testing.T) {
+	cfg := &config.Config{Session: config.DefaultConfigData(), File: config.DefaultConfigData()}
+	cfg.Session.Beatport.VariousArtistsThreshold = -1
+	c := New(cfg)
+	got := c.releaseArtistName([]any{
+		map[string]any{"name": "A"},
+		map[string]any{"name": "B"},
+		map[string]any{"name": "C"},
+		map[string]any{"name": "D"},
+	})
+	if got != "A, B, C, D" {
+		t.Fatalf("releaseArtistName() = %q", got)
+	}
+}
+
+func TestArtistMetadataUsesReleases(t *testing.T) {
+	c, closeServer := newTestClient(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.URL.Path {
+		case "/catalog/artists/908468/":
+			writeJSON(t, w, map[string]any{"id": 908468, "name": "D'ort"})
+		case "/catalog/releases/":
+			if got := r.URL.Query().Get("artist_id"); got != "908468" {
+				t.Fatalf("artist_id = %q", got)
+			}
+			writeJSON(t, w, map[string]any{
+				"next": nil,
+				"results": []any{map[string]any{
+					"id":               123,
+					"name":             "An Artisan's Exhibition",
+					"new_release_date": "2026-01-01",
+					"track_count":      10,
+					"artists":          []any{map[string]any{"id": 908468, "name": "D'ort"}},
+				}},
+			})
+		default:
+			t.Fatalf("unexpected path %q", r.URL.Path)
+		}
+	}))
+	defer closeServer()
+
+	meta, err := c.GetMetadata(context.Background(), "908468", "artist")
+	if err != nil {
+		t.Fatalf("GetMetadata() error = %v", err)
+	}
+	if meta["name"] != "D'ort" {
+		t.Fatalf("artist name = %q", meta["name"])
+	}
+	albums := meta["albums"].(map[string]any)["items"].([]any)
+	if len(albums) != 1 {
+		t.Fatalf("albums len = %d", len(albums))
+	}
+	album := albums[0].(map[string]any)
+	if album["id"] != "123" || album["title"] != "An Artisan's Exhibition" || album["tracks_count"] != 10 {
+		t.Fatalf("unexpected album: %+v", album)
+	}
+}

internal/urlparse/parse.go

@@ -47,6 +47,8 @@ func Parse(raw string) *ParsedURL {
 		return parseQobuz(raw, parts)
 	case isYandexHost(host):
 		return parseYandex(raw, parts)
+	case isBeatportHost(host):
+		return parseBeatport(raw, parts)
 	case isTidalHost(host):
 		return parseTidal(raw, parts)
 	case isDeezerHost(host):
@@ -58,6 +60,60 @@ func Parse(raw string) *ParsedURL {
 	}
 }
 
+func parseBeatport(raw string, parts []string) *ParsedURL {
+	if len(parts) < 2 {
+		return nil
+	}
+	if len(parts[0]) == 2 {
+		parts = parts[1:]
+	}
+	if len(parts) > 0 && parts[0] == "catalog" {
+		parts = parts[1:]
+	}
+	if len(parts) < 2 {
+		return nil
+	}
+
+	mediaType := ""
+	idIndex := 1
+	switch parts[0] {
+	case "track", "tracks":
+		mediaType = "track"
+		if parts[0] == "track" {
+			idIndex = 2
+		}
+	case "release", "releases":
+		mediaType = "album"
+		if parts[0] == "release" {
+			idIndex = 2
+		}
+	case "library":
+		if len(parts) < 3 || (parts[1] != "playlists" && parts[1] != "playlist") {
+			return nil
+		}
+		mediaType = "playlist"
+		idIndex = 2
+	case "playlists":
+		mediaType = "playlist"
+		idIndex = 2
+	case "chart", "playlist":
+		mediaType = "chart"
+		idIndex = 2
+	case "artist":
+		mediaType = "artist"
+		idIndex = 2
+	case "label":
+		mediaType = "label"
+		idIndex = 2
+	default:
+		return nil
+	}
+	if idIndex >= len(parts) || strings.TrimSpace(parts[idIndex]) == "" {
+		return nil
+	}
+	return &ParsedURL{OriginalURL: raw, Source: "beatport", MediaType: mediaType, ID: parts[idIndex], Kind: KindGeneric}
+}
+
 func parseQobuz(raw string, parts []string) *ParsedURL {
 	if len(parts) < 2 {
 		return nil
@@ -222,6 +278,10 @@ func isYandexHost(host string) bool {
 	return host == "music.yandex.ru" || host == "music.yandex.com" || host == "music.yandex.kz" || host == "music.yandex.by"
 }
 
+func isBeatportHost(host string) bool {
+	return host == "beatport.com" || host == "api.beatport.com"
+}
+
 func isTidalHost(host string) bool {
 	return host == "tidal.com" || host == "open.tidal.com" || host == "listen.tidal.com"
 }
@@ -236,7 +296,7 @@ func isSoundcloudHost(host string) bool {
 
 func isSupportedMedia(mediaType string) bool {
 	switch mediaType {
-	case "album", "track", "playlist", "artist", "label", "video":
+	case "album", "track", "playlist", "artist", "label", "video", "chart":
 		return true
 	default:
 		return false

internal/urlparse/parse_test.go

@@ -67,6 +67,31 @@ func TestYandexURLs(t *testing.T) {
 	}
 }
 
+func TestBeatportURLs(t *testing.T) {
+	tests := []struct {
+		url       string
+		mediaType string
+		id        string
+	}{
+		{url: "https://www.beatport.com/track/strobe/1696999", mediaType: "track", id: "1696999"},
+		{url: "https://www.beatport.com/release/random-album/12345", mediaType: "album", id: "12345"},
+		{url: "https://www.beatport.com/library/playlists/67890", mediaType: "playlist", id: "67890"},
+		{url: "https://www.beatport.com/chart/some-chart/111", mediaType: "chart", id: "111"},
+		{url: "https://www.beatport.com/artist/deadmau5/24078", mediaType: "artist", id: "24078"},
+		{url: "https://www.beatport.com/label/mau5trap/1234", mediaType: "label", id: "1234"},
+		{url: "https://api.beatport.com/v4/catalog/tracks/1696999/", mediaType: "track", id: "1696999"},
+	}
+	for _, tc := range tests {
+		result := Parse(tc.url)
+		if result == nil {
+			t.Fatalf("expected parse for %q", tc.url)
+		}
+		if result.Source != "beatport" || result.MediaType != tc.mediaType || result.ID != tc.id {
+			t.Fatalf("unexpected parse result for %q: %+v", tc.url, result)
+		}
+	}
+}
+
 func TestTidalTrackURL(t *testing.T) {
 	inputs := []string{
 		"https://tidal.com/browse/track/3083287",