navidrome/model/mediafile.go

package model

import (
	"cmp"
	"context"
	"encoding/json"
	"fmt"
	"iter"
	"mime"
	"path/filepath"
	"slices"
	"strings"
	"time"

	"github.com/deluan/rest"
	"github.com/gohugoio/hashstructure"
	"github.com/navidrome/navidrome/conf"
	"github.com/navidrome/navidrome/consts"
	"github.com/navidrome/navidrome/model/criteria"
	"github.com/navidrome/navidrome/utils"
	"github.com/navidrome/navidrome/utils/gg"
	"github.com/navidrome/navidrome/utils/number"
	"github.com/navidrome/navidrome/utils/slice"
	"github.com/zeebo/xxh3"
)

type MediaFile struct {
	Annotations  `structs:"-" hash:"ignore"`
	Bookmarkable `structs:"-" hash:"ignore"`
	ItemImage    `structs:"-" hash:"ignore"`

	// AlbumImage is the parent album's artwork state, hydrated alongside the track's own so a
	// song's Jellyfin album-art tag can be pixel-versioned without a second query.
	AlbumImage ItemImage `structs:"-" json:"-" hash:"ignore"`

	ID          string `structs:"id"  json:"id" hash:"ignore"`
	PID         string `structs:"pid" json:"-" hash:"ignore"`
	LibraryID   int    `structs:"library_id" json:"libraryId" hash:"ignore"`
	LibraryPath string `structs:"-" json:"libraryPath" hash:"ignore"`
	LibraryName string `structs:"-" json:"libraryName" hash:"ignore"`
	FolderID    string `structs:"folder_id" json:"folderId" hash:"ignore"`
	Path        string `structs:"path" json:"path" hash:"ignore"`
	Title       string `structs:"title" json:"title"`
	Album       string `structs:"album" json:"album"`
	ArtistID    string `structs:"artist_id" json:"artistId"` // Deprecated: Use Participants instead
	// Artist is the display name used for the artist.
	Artist        string `structs:"artist" json:"artist"`
	AlbumArtistID string `structs:"album_artist_id" json:"albumArtistId"` // Deprecated: Use Participants instead
	// AlbumArtist is the display name used for the album artist.
	AlbumArtist          string   `structs:"album_artist" json:"albumArtist"`
	AlbumID              string   `structs:"album_id" json:"albumId" hash:"ignore"`
	HasCoverArt          bool     `structs:"has_cover_art" json:"hasCoverArt"`
	TrackNumber          int      `structs:"track_number" json:"trackNumber"`
	DiscNumber           int      `structs:"disc_number" json:"discNumber"`
	DiscSubtitle         string   `structs:"disc_subtitle" json:"discSubtitle,omitempty"`
	Year                 int      `structs:"year" json:"year"`
	Date                 string   `structs:"date" json:"date,omitempty"`
	OriginalYear         int      `structs:"original_year" json:"originalYear"`
	OriginalDate         string   `structs:"original_date" json:"originalDate,omitempty"`
	ReleaseYear          int      `structs:"release_year" json:"releaseYear"`
	ReleaseDate          string   `structs:"release_date" json:"releaseDate,omitempty"`
	Size                 int64    `structs:"size" json:"size"`
	Suffix               string   `structs:"suffix" json:"suffix"`
	Duration             float32  `structs:"duration" json:"duration"`
	BitRate              int      `structs:"bit_rate" json:"bitRate"`
	SampleRate           int      `structs:"sample_rate" json:"sampleRate"`
	BitDepth             *int     `structs:"bit_depth" json:"bitDepth,omitempty"`
	Channels             int      `structs:"channels" json:"channels"`
	Codec                string   `structs:"codec" json:"codec"`
	ProbeData            string   `structs:"probe_data" json:"-" hash:"ignore"`
	Genre                string   `structs:"genre" json:"genre"`
	Genres               Genres   `structs:"-" json:"genres,omitempty"`
	SortTitle            string   `structs:"sort_title" json:"sortTitle,omitempty"`
	SortAlbumName        string   `structs:"sort_album_name" json:"sortAlbumName,omitempty"`
	SortArtistName       string   `structs:"sort_artist_name" json:"sortArtistName,omitempty"`            // Deprecated: Use Participants instead
	SortAlbumArtistName  string   `structs:"sort_album_artist_name" json:"sortAlbumArtistName,omitempty"` // Deprecated: Use Participants instead
	OrderTitle           string   `structs:"order_title" json:"orderTitle,omitempty"`
	OrderAlbumName       string   `structs:"order_album_name" json:"orderAlbumName"`
	OrderArtistName      string   `structs:"order_artist_name" json:"orderArtistName"`            // Deprecated: Use Participants instead
	OrderAlbumArtistName string   `structs:"order_album_artist_name" json:"orderAlbumArtistName"` // Deprecated: Use Participants instead
	Compilation          bool     `structs:"compilation" json:"compilation"`
	Comment              string   `structs:"comment" json:"comment,omitempty"`
	Lyrics               string   `structs:"lyrics" json:"lyrics"`
	BPM                  *int     `structs:"bpm" json:"bpm,omitempty"`
	ExplicitStatus       string   `structs:"explicit_status" json:"explicitStatus"`
	CatalogNum           string   `structs:"catalog_num" json:"catalogNum,omitempty"`
	MbzRecordingID       string   `structs:"mbz_recording_id" json:"mbzRecordingID,omitempty"`
	MbzReleaseTrackID    string   `structs:"mbz_release_track_id" json:"mbzReleaseTrackId,omitempty"`
	MbzAlbumID           string   `structs:"mbz_album_id" json:"mbzAlbumId,omitempty"`
	MbzReleaseGroupID    string   `structs:"mbz_release_group_id" json:"mbzReleaseGroupId,omitempty"`
	MbzArtistID          string   `structs:"mbz_artist_id" json:"mbzArtistId,omitempty"`            // Deprecated: Use Participants instead
	MbzAlbumArtistID     string   `structs:"mbz_album_artist_id" json:"mbzAlbumArtistId,omitempty"` // Deprecated: Use Participants instead
	MbzAlbumType         string   `structs:"mbz_album_type" json:"mbzAlbumType,omitempty"`
	MbzAlbumComment      string   `structs:"mbz_album_comment" json:"mbzAlbumComment,omitempty"`
	RGAlbumGain          *float64 `structs:"rg_album_gain" json:"rgAlbumGain"`
	RGAlbumPeak          *float64 `structs:"rg_album_peak" json:"rgAlbumPeak"`
	RGTrackGain          *float64 `structs:"rg_track_gain" json:"rgTrackGain"`
	RGTrackPeak          *float64 `structs:"rg_track_peak" json:"rgTrackPeak"`

	Tags         Tags         `structs:"tags" json:"tags,omitempty" hash:"ignore"`       // All imported tags from the original file
	Participants Participants `structs:"participants" json:"participants" hash:"ignore"` // All artists that participated in this track

	Missing   bool      `structs:"missing" json:"missing" hash:"ignore"`      // If the file is not found in the library's FS
	BirthTime time.Time `structs:"birth_time" json:"birthTime" hash:"ignore"` // Time of file creation (ctime)
	CreatedAt time.Time `structs:"created_at" json:"createdAt" hash:"ignore"` // Time this entry was created in the DB
	UpdatedAt time.Time `structs:"updated_at" json:"updatedAt" hash:"ignore"` // Time of file last update (mtime)
}

func (mf MediaFile) FullTitle() string {
	if s := mf.Tags.First(TagSubtitle); conf.Server.Subsonic.AppendSubtitle && s != "" {
		return appendSuffix(mf.Title, s)
	}
	return mf.Title
}

func (mf MediaFile) FullAlbumName() string {
	if v := mf.Tags.First(TagAlbumVersion); conf.Server.Subsonic.AppendAlbumVersion && v != "" {
		return appendSuffix(mf.Album, v)
	}
	return mf.Album
}

var bracketPairs = map[byte]byte{'(': ')', '[': ']', '{': '}', '<': '>'}

func appendSuffix(base, suffix string) string {
	suffix = strings.TrimSpace(suffix)
	if len(suffix) >= 2 && bracketPairs[suffix[0]] == suffix[len(suffix)-1] {
		return base + " " + suffix
	}
	return base + " (" + suffix + ")"
}

func (mf MediaFile) ContentType() string {
	return mime.TypeByExtension("." + mf.Suffix)
}

func (mf MediaFile) CoverArtID() ArtworkID {
	// If it has a cover art, return it (if feature is disabled, skip)
	if mf.HasCoverArt && conf.Server.EnableMediaFileCoverArt {
		return artworkIDFromMediaFile(mf)
	}
	// Otherwise fallback to disc (if available) or album cover
	return mf.DiscCoverArtID()
}

// DiscCoverArtID returns the disc artwork ID when the media file has a disc number,
// otherwise it returns the album artwork ID.
func (mf MediaFile) DiscCoverArtID() ArtworkID {
	if mf.DiscNumber > 0 {
		return ArtworkID{Kind: KindDiscArtwork, ID: DiscArtworkID(mf.AlbumID, mf.DiscNumber), Hash: mf.ImageHash}
	}
	return mf.AlbumCoverArtID()
}

// AlbumCoverArtID uses AlbumImage, not the track's own ItemImage: an album id must carry the
// album's content hash even when the track resolved art of its own.
func (mf MediaFile) AlbumCoverArtID() ArtworkID {
	return artworkIDFromAlbum(Album{ID: mf.AlbumID, ItemImage: mf.AlbumImage})
}

func (mf MediaFile) StructuredLyrics() (LyricList, error) {
	var lyrics LyricList
	err := json.Unmarshal([]byte(mf.Lyrics), &lyrics)
	if err != nil {
		return nil, err
	}
	return lyrics, nil
}

// HasEmbeddedLyrics reports whether the lyrics column holds any lyrics. It is never "" post-scan;
// no-lyrics is normalized to the "[]" sentinel, so string emptiness alone is meaningless.
func (mf MediaFile) HasEmbeddedLyrics() bool {
	return mf.Lyrics != "" && mf.Lyrics != "[]"
}

// String is mainly used for debugging
func (mf MediaFile) String() string {
	return mf.Path
}

type Work struct {
	Name      string
	MbzWorkID string
}

type Movement struct {
	Name   string
	Number int32
	Count  int32
}

func (mf MediaFile) Works() []Work {
	names := mf.Tags.Values(TagWork)
	if len(names) == 0 {
		return nil
	}
	ids := mf.Tags.Values(TagMusicBrainzWorkID)
	works := make([]Work, 0, len(names))
	for i, name := range names {
		w := Work{Name: name}
		if i < len(ids) {
			w.MbzWorkID = ids[i]
		}
		works = append(works, w)
	}
	return works
}

func (mf MediaFile) Movements() []Movement {
	names := mf.Tags.Values(TagMovementName)
	if len(names) == 0 {
		return nil
	}
	numbers := mf.Tags.Values(TagMovementNumber)
	counts := mf.Tags.Values(TagMovementTotal)
	movements := make([]Movement, 0, len(names))
	for i, name := range names {
		m := Movement{Name: name}
		if i < len(numbers) {
			m.Number = number.ParseInt[int32](numbers[i])
		}
		if i < len(counts) {
			m.Count = number.ParseInt[int32](counts[i])
		}
		movements = append(movements, m)
	}
	return movements
}

// Hash returns a hash of the MediaFile based on its tags and audio properties
func (mf MediaFile) Hash() string {
	opts := &hashstructure.HashOptions{
		IgnoreZeroValue: true,
		ZeroNil:         true,
	}
	hash, _ := hashstructure.Hash(mf, opts)
	sum := xxh3.New()
	sum.Write(fmt.Appendf(nil, "%d", hash))
	sum.Write(mf.Tags.Hash())
	sum.Write(mf.Participants.Hash())
	return fmt.Sprintf("%x", sum.Sum(nil))
}

// Equals compares two MediaFiles by their hash. It does not consider the ID, PID, Path and other identifier fields.
// Check the structure for the fields that are marked with `hash:"ignore"`.
func (mf MediaFile) Equals(other MediaFile) bool {
	return mf.Hash() == other.Hash()
}

// IsEquivalent compares two MediaFiles by path only. Used for matching missing tracks.
func (mf MediaFile) IsEquivalent(other MediaFile) bool {
	return utils.BaseName(mf.Path) == utils.BaseName(other.Path)
}

func (mf MediaFile) AbsolutePath() string {
	return filepath.Join(mf.LibraryPath, mf.Path)
}

// AudioCodec returns the audio codec for this file.
// Uses the stored Codec field if available, otherwise infers from Suffix and audio properties.
func (mf MediaFile) AudioCodec() string {
	// If we have a stored codec from scanning, normalize and return it
	if mf.Codec != "" {
		return strings.ToLower(mf.Codec)
	}
	// Fallback: infer from Suffix + BitDepth
	return mf.inferCodecFromSuffix()
}

// inferCodecFromSuffix infers the codec from the file extension when Codec field is empty.
func (mf MediaFile) inferCodecFromSuffix() string {
	switch strings.ToLower(mf.Suffix) {
	case "mp3", "mpga":
		return "mp3"
	case "mp2":
		return "mp2"
	case "ogg", "oga":
		return "vorbis"
	case "opus":
		return "opus"
	case "mpc":
		return "mpc"
	case "wma":
		return "wma"
	case "flac":
		return "flac"
	case "wav":
		return "pcm"
	case "aif", "aiff", "aifc":
		return "pcm"
	case "ape":
		return "ape"
	case "wv", "wvp":
		return "wv"
	case "tta":
		return "tta"
	case "tak":
		return "tak"
	case "shn":
		return "shn"
	case "dsf", "dff":
		return "dsd"
	case "m4a":
		// AAC if BitDepth==0, ALAC if BitDepth>0
		if gg.V(mf.BitDepth) > 0 {
			return "alac"
		}
		return "aac"
	case "m4b", "m4p", "m4r":
		return "aac"
	default:
		return ""
	}
}

type MediaFiles []MediaFile

// ToAlbum creates an Album object based on the attributes of this MediaFiles collection.
// It assumes all mediafiles have the same Album (same ID), or else results are unpredictable.
func (mfs MediaFiles) ToAlbum() Album {
	if len(mfs) == 0 {
		return Album{}
	}
	a := Album{SongCount: len(mfs), Tags: make(Tags), Participants: make(Participants), Discs: Discs{1: ""}}

	// Sorting the mediafiles ensure the results will be consistent
	slices.SortFunc(mfs, func(a, b MediaFile) int { return cmp.Compare(a.Path, b.Path) })

	mbzAlbumIds := make([]string, 0, len(mfs))
	mbzReleaseGroupIds := make([]string, 0, len(mfs))
	comments := make([]string, 0, len(mfs))
	years := make([]int, 0, len(mfs))
	dates := make([]string, 0, len(mfs))
	originalYears := make([]int, 0, len(mfs))
	originalDates := make([]string, 0, len(mfs))
	releaseDates := make([]string, 0, len(mfs))
	rgAlbumGains := make([]*float64, 0, len(mfs))
	rgAlbumPeaks := make([]*float64, 0, len(mfs))
	tags := make(TagList, 0, len(mfs[0].Tags)*len(mfs))

	a.Missing = true
	embedArtPath := ""
	embedArtDisc := 0
	for _, m := range mfs {
		// We assume these attributes are all the same for all songs in an album
		a.ID = m.AlbumID
		a.LibraryID = m.LibraryID
		a.Name = m.Album
		a.AlbumArtist = m.AlbumArtist
		a.AlbumArtistID = m.AlbumArtistID
		a.SortAlbumName = m.SortAlbumName
		a.SortAlbumArtistName = m.SortAlbumArtistName
		a.OrderAlbumName = m.OrderAlbumName
		a.OrderAlbumArtistName = m.OrderAlbumArtistName
		a.MbzAlbumArtistID = m.MbzAlbumArtistID
		a.MbzAlbumType = m.MbzAlbumType
		a.MbzAlbumComment = m.MbzAlbumComment
		a.CatalogNum = m.CatalogNum
		a.Compilation = a.Compilation || m.Compilation

		// Calculated attributes based on aggregations
		a.Duration += m.Duration
		a.Size += m.Size
		years = append(years, m.Year)
		dates = append(dates, m.Date)
		originalYears = append(originalYears, m.OriginalYear)
		originalDates = append(originalDates, m.OriginalDate)
		releaseDates = append(releaseDates, m.ReleaseDate)
		rgAlbumGains = append(rgAlbumGains, m.RGAlbumGain)
		rgAlbumPeaks = append(rgAlbumPeaks, m.RGAlbumPeak)
		comments = append(comments, m.Comment)
		mbzAlbumIds = append(mbzAlbumIds, m.MbzAlbumID)
		mbzReleaseGroupIds = append(mbzReleaseGroupIds, m.MbzReleaseGroupID)
		if m.DiscNumber > 0 {
			a.Discs.Add(m.DiscNumber, m.DiscSubtitle)
		}
		tags = append(tags, m.Tags.FlattenAll()...)
		a.Participants.Merge(m.Participants)

		// Find the MediaFile with cover art and the lowest disc number to use for album cover
		embedArtPath, embedArtDisc = firstArtPath(embedArtPath, embedArtDisc, m)

		if m.ExplicitStatus == "c" && a.ExplicitStatus != "e" {
			a.ExplicitStatus = "c"
		} else if m.ExplicitStatus == "e" {
			a.ExplicitStatus = "e"
		}

		a.UpdatedAt = newer(a.UpdatedAt, m.UpdatedAt)
		a.CreatedAt = older(a.CreatedAt, m.BirthTime)
		a.Missing = a.Missing && m.Missing
	}

	a.EmbedArtPath = embedArtPath
	a.SetTags(tags)
	a.FolderIDs = slice.Unique(slice.Map(mfs, func(m MediaFile) string { return m.FolderID }))
	a.Date, _ = allOrNothing(dates)
	a.OriginalDate, _ = allOrNothing(originalDates)
	a.ReleaseDate, _ = allOrNothing(releaseDates)
	a.MinYear, a.MaxYear = minMax(years)
	a.MinOriginalYear, a.MaxOriginalYear = minMax(originalYears)
	a.Comment, _ = allOrNothing(comments)
	a.MbzAlbumID = slice.MostFrequent(mbzAlbumIds)
	a.MbzReleaseGroupID = slice.MostFrequent(mbzReleaseGroupIds)
	a.RGAlbumGain = mostFrequentPtr(rgAlbumGains)
	a.RGAlbumPeak = mostFrequentPtr(rgAlbumPeaks)
	fixAlbumArtist(&a)

	return a
}

func allOrNothing(items []string) (string, int) {
	if len(items) == 0 {
		return "", 0
	}
	items = slice.Unique(items)
	if len(items) != 1 {
		return "", len(items)
	}
	return items[0], 1
}

func minMax(items []int) (int, int) {
	var mn, mx = items[0], items[0]
	for _, value := range items {
		mx = max(mx, value)
		if mn == 0 {
			mn = value
		} else if value > 0 {
			mn = min(mn, value)
		}
	}
	return mn, mx
}

// mostFrequentPtr returns a pointer to the most common non-nil value, or nil if
// none. It counts by dereferenced value so a genuine 0.0 is a real candidate
// (slice.MostFrequent skips the zero value and compares pointers by identity).
func mostFrequentPtr(items []*float64) *float64 {
	var counts map[float64]int
	var best float64
	var bestCount int
	for _, it := range items {
		if it == nil {
			continue
		}
		if counts == nil {
			counts = map[float64]int{}
		}
		counts[*it]++
		if counts[*it] > bestCount {
			bestCount = counts[*it]
			best = *it
		}
	}
	if bestCount == 0 {
		return nil
	}
	return &best
}

func newer(t1, t2 time.Time) time.Time {
	if t1.After(t2) {
		return t1
	}
	return t2
}

func older(t1, t2 time.Time) time.Time {
	if t1.IsZero() {
		return t2
	}
	if t2.IsZero() {
		return t1
	}
	if t1.After(t2) {
		return t2
	}
	return t1
}

// fixAlbumArtist sets the AlbumArtist to "Various Artists" if the album has more than one artist
// or if it is a compilation
func fixAlbumArtist(a *Album) {
	if !a.Compilation {
		if a.AlbumArtistID == "" {
			artist := a.Participants.First(RoleArtist)
			a.AlbumArtistID = artist.ID
			a.AlbumArtist = artist.Name
		}
		return
	}
	albumArtistIds := slice.Map(a.Participants[RoleAlbumArtist], func(p Participant) string { return p.ID })
	if len(slice.Unique(albumArtistIds)) > 1 {
		a.AlbumArtist = consts.VariousArtists
		a.AlbumArtistID = consts.VariousArtistsID
	}
}

// firstArtPath determines which media file path should be used for album artwork
// based on disc number (preferring lower disc numbers) and path (for consistency)
func firstArtPath(currentPath string, currentDisc int, m MediaFile) (string, int) {
	if !m.HasCoverArt {
		return currentPath, currentDisc
	}

	// If current has no disc number (currentDisc == 0) or new file has lower disc number
	if currentDisc == 0 || (m.DiscNumber < currentDisc && m.DiscNumber > 0) {
		return m.Path, m.DiscNumber
	}

	// If disc numbers are equal, use path for ordering
	if m.DiscNumber == currentDisc {
		if m.Path < currentPath || currentPath == "" {
			return m.Path, m.DiscNumber
		}
	}

	return currentPath, currentDisc
}

// ToM3U8 exports the playlist to the Extended M3U8 format, as specified in
// https://docs.fileformat.com/audio/m3u/#extended-m3u
func (mfs MediaFiles) ToM3U8(title string, absolutePaths bool) string {
	buf := strings.Builder{}
	buf.WriteString("#EXTM3U\n")
	buf.WriteString(fmt.Sprintf("#PLAYLIST:%s\n", title))
	for _, t := range mfs {
		buf.WriteString(fmt.Sprintf("#EXTINF:%.f,%s - %s\n", t.Duration, t.Artist, t.Title))
		if absolutePaths {
			buf.WriteString(t.AbsolutePath() + "\n")
		} else {
			buf.WriteString(t.Path + "\n")
		}
	}
	return buf.String()
}

type MediaFileCursor iter.Seq2[MediaFile, error]

type MediaFileRepository interface {
	rest.Repository[MediaFile]
	CountAll(ctx context.Context, options ...QueryOptions) (int64, error)
	CountBySuffix(ctx context.Context, options ...QueryOptions) (map[string]int64, error)
	Exists(ctx context.Context, id string) (bool, error)
	Put(ctx context.Context, m *MediaFile) error
	UpdateProbeData(ctx context.Context, id string, data string) error
	Get(ctx context.Context, id string) (*MediaFile, error)
	GetWithParticipants(ctx context.Context, id string) (*MediaFile, error)
	GetAll(ctx context.Context, options ...QueryOptions) (MediaFiles, error)
	// GetRandom returns up to options.Max media files in random order, applying the same
	// filters as GetAll. Sort/Order are ignored.
	GetRandom(ctx context.Context, options ...QueryOptions) (MediaFiles, error)
	GetAllByTags(ctx context.Context, tag TagName, values []string, options ...QueryOptions) (MediaFiles, error)
	// MatchesCriteria reports whether the media file matches the criteria's rule
	// expression, using the logged user's annotations. Limit and offset are ignored.
	MatchesCriteria(ctx context.Context, id string, c criteria.Criteria) (bool, error)
	GetCursor(ctx context.Context, options ...QueryOptions) (MediaFileCursor, error)
	// GetAlbumIDsByFolder returns the distinct IDs of albums with non-missing tracks in the given
	// folders or their direct children.
	GetAlbumIDsByFolder(ctx context.Context, lib Library, folderIDs ...string) ([]string, error)
	// GetCursorWithArtwork streams like GetCursor, hydrated, so callers that render images don't
	// pay the scanner's per-row cost; it uses the same id pre-pass as the other cursors.
	GetCursorWithArtwork(ctx context.Context, options ...QueryOptions) (MediaFileCursor, error)
	Delete(ctx context.Context, id string) error
	DeleteMissing(ctx context.Context, ids []string) error
	DeleteAllMissing(ctx context.Context) (int64, error)
	FindByPaths(ctx context.Context, paths []string) (MediaFiles, error)
	// ReassignReferences moves annotations, bookmarks and playlist entries from prevID to newID,
	// keeping newID's own row wherever a user has both.
	ReassignReferences(ctx context.Context, prevID, newID string) error

	// The following methods are used exclusively by the scanner:
	MarkMissing(ctx context.Context, missing bool, mfs ...*MediaFile) error
	MarkMissingByFolder(ctx context.Context, missing bool, folderIDs ...string) error
	GetMissingAndMatching(ctx context.Context, libId int) (MediaFileCursor, error)
	FindRecentFilesByMBZTrackID(ctx context.Context, missing MediaFile, since time.Time) (MediaFiles, error)
	FindRecentFilesByProperties(ctx context.Context, missing MediaFile, since time.Time) (MediaFiles, error)

	AnnotatedRepository
	BookmarkableRepository
	SearchableRepository[MediaFiles]
}