yandex-music-api-go/internal/models/track.go

// Package models provides data models for the Yandex Music API.
package models

import (
	"encoding/json"
)

// Track represents a full track from the Yandex Music API.
type Track struct {
	BaseModel
	ID                          JSONID           `json:"id"`
	Title                       string           `json:"title"`
	Available                   bool             `json:"available"`
	Artists                     []Artist         `json:"artists"`
	Albums                      []Album          `json:"albums"`
	AvailableForPremiumUsers    bool             `json:"available_for_premium_users"`
	LyricsAvailable             bool             `json:"lyrics_available"`
	Best                        bool             `json:"best"`
	RealID                      JSONID           `json:"real_id"`
	OgImage                     string           `json:"og_image"`
	Type                        string           `json:"type"`
	CoverURI                    string           `json:"cover_uri"`
	Major                       *Major           `json:"major"`
	DurationMs                  int              `json:"duration_ms"`
	StorageDir                  string           `json:"storage_dir"`
	FileSize                    int64            `json:"file_size"`
	Genre                       string           `json:"genre"`
	AvailableAsRingtone         bool             `json:"available_as_ringtone"`
	RingtoneID                  string           `json:"ringtone_id"`
	SimilarTracks               []Track          `json:"similar_tracks"`
	Position                    *TrackPosition   `json:"position"`
	Substituted                 *Track           `json:"substituted"`
	MatchedTrack                *Track           `json:"matched_track"`
	Normalization               *Normalization   `json:"normalization"`
	Error                       string           `json:"error"`
	CanPublish                  bool             `json:"can_publish"`
	State                       string           `json:"state"`
	DesiredVisibility           string           `json:"desired_visibility"`
	Filename                    string           `json:"filename"`
	UserInfo                    *User            `json:"user_info"`
	MetaData                    *MetaData        `json:"meta_data"`
	Regions                     []string         `json:"regions"`
	AvailableAsRbt              bool             `json:"available_as_rbt"`
	ContentWarning              string           `json:"content_warning"`
	Explicit                    bool             `json:"explicit"`
	PreviewDurationMs           int              `json:"preview_duration_ms"`
	AvailableFullWithoutPermission bool            `json:"available_full_without_permission"`
	Version                     string           `json:"version"`
	RememberPosition            bool             `json:"remember_position"`
	BackgroundVideoURI          string           `json:"background_video_uri"`
	ShortDescription            string           `json:"short_description"`
	IsSuitableForChildren       bool             `json:"is_suitable_for_children"`
	TrackSource                 string           `json:"track_source"`
	AvailableForOptions         []string         `json:"available_for_options"`
	R128                        *R128            `json:"r128"`
	LyricsInfo                  *TrackLyricsInfo `json:"lyrics_info"`
	TrackSharingFlag            string           `json:"track_sharing_flag"`
	DerivedColors               *CoverDerivedColors `json:"derived_colors"`
	Fade                        *Fade            `json:"fade"`
	SmartPreviewParams          *SmartPreviewParams `json:"smart_preview_params"`
	SpecialAudioResources       []string         `json:"special_audio_resources"`
	Disclaimers                 []string         `json:"disclaimers"`
	BackgroundVideoID           string           `json:"background_video_id"`
	PlayerID                    string           `json:"player_id"`
	MixFade                     *Fade            `json:"mix_fade"`
	Chart                       *Chart           `json:"chart"`
	ClipIDs                     []int            `json:"clip_ids"`
	Isrc                        string           `json:"isrc"`
	UgcArtistName               string           `json:"ugc_artist_name"`
	PodcastEpisodeType          string           `json:"podcast_episode_type"`
	PubDate                     string           `json:"pub_date"`
	DownloadInfo                []DownloadInfo   `json:"download_info"`
}

// DeJSON deserializes a Track from JSON data.
func (t *Track) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	track := &Track{BaseModel: *NewBaseModel(c)}

	// Simple fields
	if v, ok := raw["id"]; ok {
		json.Unmarshal(v, &track.ID)
	}
	if v, ok := raw["title"]; ok {
		json.Unmarshal(v, &track.Title)
	}
	if v, ok := raw["duration_ms"]; ok {
		json.Unmarshal(v, &track.DurationMs)
	}
	if v, ok := raw["storage_dir"]; ok {
		json.Unmarshal(v, &track.StorageDir)
	}
	if v, ok := raw["cover_uri"]; ok {
		json.Unmarshal(v, &track.CoverURI)
	}
	if v, ok := raw["genre"]; ok {
		json.Unmarshal(v, &track.Genre)
	}
	if v, ok := raw["version"]; ok {
		json.Unmarshal(v, &track.Version)
	}
	if v, ok := raw["explicit"]; ok {
		json.Unmarshal(v, &track.Explicit)
	}
	if v, ok := raw["available"]; ok {
		json.Unmarshal(v, &track.Available)
	}
	if v, ok := raw["available_for_premium_users"]; ok {
		json.Unmarshal(v, &track.AvailableForPremiumUsers)
	}
	if v, ok := raw["r128"]; ok {
		json.Unmarshal(v, &track.R128)
	}
	if v, ok := raw["track_sharing_flag"]; ok {
		json.Unmarshal(v, &track.TrackSharingFlag)
	}
	if v, ok := raw["available_as_ringtone"]; ok {
		json.Unmarshal(v, &track.AvailableAsRingtone)
	}
	if v, ok := raw["ringtone_id"]; ok {
		json.Unmarshal(v, &track.RingtoneID)
	}

	// Nested objects
	if v, ok := raw["artists"]; ok {
		var artists []Artist
		if err := json.Unmarshal(v, &artists); err == nil {
			track.Artists = artists
		}
	}
	if v, ok := raw["albums"]; ok {
		var albums []Album
		if err := json.Unmarshal(v, &albums); err == nil {
			track.Albums = albums
		}
	}
	if v, ok := raw["major"]; ok {
		var major Major
		if err := json.Unmarshal(v, &major); err == nil {
			track.Major = &major
		}
	}
	if v, ok := raw["lyrics_info"]; ok {
		var lyrics TrackLyricsInfo
		if err := json.Unmarshal(v, &lyrics); err == nil {
			track.LyricsInfo = &lyrics
		}
	}
	if v, ok := raw["similar_tracks"]; ok {
		var similar []Track
		if err := json.Unmarshal(v, &similar); err == nil {
			track.SimilarTracks = similar
		}
	}
	if v, ok := raw["download_info"]; ok {
		var downloadInfo []DownloadInfo
		if err := json.Unmarshal(v, &downloadInfo); err == nil {
			track.DownloadInfo = downloadInfo
		}
	}
	if v, ok := raw["position"]; ok {
		var pos TrackPosition
		if err := json.Unmarshal(v, &pos); err == nil {
			track.Position = &pos
		}
	}

	return track, nil
}

// DeList deserializes a list of Tracks from JSON data.
func (t *Track) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		track := &Track{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, track); err != nil {
			continue
		}
		result = append(result, track)
	}
	return result, nil
}

// GetDownloadInfo returns download info for a specific quality, or nil if not found.
func (t *Track) GetDownloadInfo(quality string) *DownloadInfo {
	for _, info := range t.DownloadInfo {
		if info.Quality == quality {
			return &info
		}
	}
	return nil
}

// Major represents major label info for a track.
type Major struct {
	ID          JSONID `json:"id"`
	Name        string `json:"name"`
	Description string `json:"description"`
}

// TrackLyricsInfo represents lyrics availability info for a track.
type TrackLyricsInfo struct {
	BaseModel
	HasAvailableSyncLyrics  bool `json:"has_available_sync_lyrics"`
	HasAvailableTextLyrics  bool `json:"has_available_text_lyrics"`
}

// DeJSON deserializes TrackLyricsInfo from JSON data.
func (tli *TrackLyricsInfo) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	info := &TrackLyricsInfo{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["has_available_sync_lyrics"]; ok {
		json.Unmarshal(v, &info.HasAvailableSyncLyrics)
	}
	if v, ok := raw["has_available_text_lyrics"]; ok {
		json.Unmarshal(v, &info.HasAvailableTextLyrics)
	}

	return info, nil
}

// DeList deserializes a list of TrackLyricsInfo from JSON data.
func (tli *TrackLyricsInfo) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		info := &TrackLyricsInfo{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, info); err != nil {
			continue
		}
		result = append(result, info)
	}
	return result, nil
}

// DownloadInfo represents file download info for a track.
type DownloadInfo struct {
	Quality         string `json:"quality"`
	Codec           string `json:"codec"`
	Bitrate         int    `json:"bitrate"`
	Size            int64  `json:"size"`
	URL             string `json:"url"`
	DirectLink      bool   `json:"direct_link"`
	DownloadInfoURL string `json:"download_info_url"`
	DirectLinkURL   string `json:"-"` // Computed signed download URL
}

// Normalization represents track normalization values.
type Normalization struct {
	BaseModel
	Gain float64 `json:"gain"`
	Peak int     `json:"peak"`
}

// MetaData represents track metadata.
type MetaData struct {
	BaseModel
	Album     string `json:"album"`
	Volume    int    `json:"volume"`
	Year      int    `json:"year"`
	Number    int    `json:"number"`
	Genre     string `json:"genre"`
	Lyricist  string `json:"lyricist"`
	Version   string `json:"version"`
	Composer  string `json:"composer"`
}

// Fade represents fade parameters for a track.
type Fade struct {
	BaseModel
	InStart  float64 `json:"in_start"`
	InStop   float64 `json:"in_stop"`
	OutStart float64 `json:"out_start"`
	OutStop  float64 `json:"out_stop"`
}

// SmartPreviewParams represents smart preview parameters.
type SmartPreviewParams struct {
	BaseModel
	DurationMs int   `json:"duration_ms"`
	Fade       *Fade `json:"fade"`
}

// CoverDerivedColors represents derived colors from cover art.
type CoverDerivedColors struct {
	BaseModel
	Average       string `json:"average"`
	WaveText      string `json:"wave_text"`
	MiniPlayer    string `json:"mini_player"`
	Accent        string `json:"accent"`
}

// CustomWave represents a custom wave for playlists.
type CustomWave struct {
	BaseModel
	Title               string `json:"title"`
	AnimationURL        string `json:"animation_url"`
	Position            string `json:"position"`
	Header              string `json:"header"`
	BackgroundImageURL  string `json:"background_image_url"`
	SquareAgentAnimation string `json:"square_agent_animation"`
}

// TrackId represents a track ID reference.
type TrackId struct {
	BaseModel
	ID       JSONID `json:"id"`
	TrackID  JSONID `json:"track_id"`
	AlbumID  JSONID `json:"album_id"`
	From     string `json:"from"`
}

// DeJSON deserializes a TrackId from JSON data.
func (ti *TrackId) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	tid := &TrackId{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["id"]; ok {
		json.Unmarshal(v, &tid.ID)
	}
	if v, ok := raw["track_id"]; ok {
		json.Unmarshal(v, &tid.TrackID)
	}
	if v, ok := raw["album_id"]; ok {
		json.Unmarshal(v, &tid.AlbumID)
	}
	if v, ok := raw["from"]; ok {
		json.Unmarshal(v, &tid.From)
	}

	return tid, nil
}

// DeList deserializes a list of TrackId from JSON data.
func (ti *TrackId) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		tid := &TrackId{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, tid); err != nil {
			continue
		}
		result = append(result, tid)
	}
	return result, nil
}

// TrackFullInfo represents full track info.
type TrackFullInfo struct {
	BaseModel
	Track           *Track   `json:"track"`
	SimilarTracks   []Track  `json:"similar_tracks"`
	AlsoInAlbums    []Track  `json:"also_in_albums"`
	Aliases         []string `json:"aliases"`
	Artists         []Artist `json:"artists"`
}

// DeJSON deserializes a TrackFullInfo from JSON data.
func (tfi *TrackFullInfo) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	info := &TrackFullInfo{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["track"]; ok {
		var track Track
		if err := json.Unmarshal(v, &track); err == nil {
			info.Track = &track
		}
	}
	if v, ok := raw["similar_tracks"]; ok {
		var tracks []Track
		if err := json.Unmarshal(v, &tracks); err == nil {
			info.SimilarTracks = tracks
		}
	}
	if v, ok := raw["also_in_albums"]; ok {
		var tracks []Track
		if err := json.Unmarshal(v, &tracks); err == nil {
			info.AlsoInAlbums = tracks
		}
	}
	if v, ok := raw["aliases"]; ok {
		json.Unmarshal(v, &info.Aliases)
	}
	if v, ok := raw["artists"]; ok {
		var artists []Artist
		if err := json.Unmarshal(v, &artists); err == nil {
			info.Artists = artists
		}
	}

	return info, nil
}

// DeList deserializes a list of TrackFullInfo from JSON data.
func (tfi *TrackFullInfo) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		info := &TrackFullInfo{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, info); err != nil {
			continue
		}
		result = append(result, info)
	}
	return result, nil
}

// SimilarTracks represents similar tracks.
type SimilarTracks struct {
	BaseModel
	Track          *Track  `json:"track"`
	SimilarTracks  []Track `json:"similar_tracks"`
}

// DeJSON deserializes SimilarTracks from JSON data.
func (st *SimilarTracks) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	similar := &SimilarTracks{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["track"]; ok {
		var track Track
		if err := json.Unmarshal(v, &track); err == nil {
			similar.Track = &track
		}
	}
	if v, ok := raw["similar_tracks"]; ok {
		var tracks []Track
		if err := json.Unmarshal(v, &tracks); err == nil {
			similar.SimilarTracks = tracks
		}
	}

	return similar, nil
}

// DeList deserializes a list of SimilarTracks from JSON data.
func (st *SimilarTracks) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		similar := &SimilarTracks{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, similar); err != nil {
			continue
		}
		result = append(result, similar)
	}
	return result, nil
}

// TrackTrailer represents track trailer info.
type TrackTrailer struct {
	BaseModel
	Title   string `json:"title"`
	Track   *Track `json:"track"`
}

// DeJSON deserializes a TrackTrailer from JSON data.
func (tt *TrackTrailer) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	trailer := &TrackTrailer{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["title"]; ok {
		json.Unmarshal(v, &trailer.Title)
	}
	if v, ok := raw["track"]; ok {
		var track Track
		if err := json.Unmarshal(v, &track); err == nil {
			trailer.Track = &track
		}
	}

	return trailer, nil
}

// DeList deserializes a list of TrackTrailer from JSON data.
func (tt *TrackTrailer) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		trailer := &TrackTrailer{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, trailer); err != nil {
			continue
		}
		result = append(result, trailer)
	}
	return result, nil
}

// FileInfo represents file info for a track.
type FileInfo struct {
	BaseModel
	DownloadInfo *FileDownloadInfo `json:"download_info"`
}

// DeJSON deserializes FileInfo from JSON data.
func (fi *FileInfo) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	info := &FileInfo{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["download_info"]; ok {
		var di FileDownloadInfo
		json.Unmarshal(v, &di)
		info.DownloadInfo = &di
	}

	return info, nil
}

// DeList deserializes a list of FileInfo from JSON data.
func (fi *FileInfo) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		info := &FileInfo{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, info); err != nil {
			continue
		}
		result = append(result, info)
	}
	return result, nil
}

// FileDownloadInfo represents file download info.
type FileDownloadInfo struct {
	BaseModel
	TrackID   string `json:"track_id"`
	Quality   string `json:"quality"`
	Codec     string `json:"codec"`
	Bitrate   int    `json:"bitrate"`
	Transport string `json:"transport"`
	URL       string `json:"url"`
	URLs      []string `json:"urls"`
	RealID    string `json:"real_id"`
	Gain      bool   `json:"gain"`
	Key       string `json:"key"`
}

// DeJSON deserializes FileDownloadInfo from JSON data.
func (fdi *FileDownloadInfo) DeJSON(data []byte, c ClientInterface) (Model, error) {
	var raw map[string]json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return nil, err
	}

	info := &FileDownloadInfo{BaseModel: *NewBaseModel(c)}

	if v, ok := raw["track_id"]; ok {
		json.Unmarshal(v, &info.TrackID)
	}
	if v, ok := raw["quality"]; ok {
		json.Unmarshal(v, &info.Quality)
	}
	if v, ok := raw["codec"]; ok {
		json.Unmarshal(v, &info.Codec)
	}
	if v, ok := raw["bitrate"]; ok {
		json.Unmarshal(v, &info.Bitrate)
	}
	if v, ok := raw["transport"]; ok {
		json.Unmarshal(v, &info.Transport)
	}
	if v, ok := raw["url"]; ok {
		json.Unmarshal(v, &info.URL)
	}
	if v, ok := raw["urls"]; ok {
		json.Unmarshal(v, &info.URLs)
	}
	if v, ok := raw["real_id"]; ok {
		json.Unmarshal(v, &info.RealID)
	}
	if v, ok := raw["gain"]; ok {
		json.Unmarshal(v, &info.Gain)
	}
	if v, ok := raw["key"]; ok {
		json.Unmarshal(v, &info.Key)
	}

	return info, nil
}

// DeList deserializes a list of FileDownloadInfo from JSON data.
func (fdi *FileDownloadInfo) DeList(data []byte, c ClientInterface) ([]Model, error) {
	var rawList []json.RawMessage
	if err := json.Unmarshal(data, &rawList); err != nil {
		return nil, err
	}

	result := make([]Model, 0, len(rawList))
	for _, item := range rawList {
		info := &FileDownloadInfo{BaseModel: *NewBaseModel(c)}
		if err := json.Unmarshal(item, info); err != nil {
			continue
		}
		result = append(result, info)
	}
	return result, nil
}