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// Package scanner implements media library scanning logic.
package scanner
import (
"context"
"fmt"
"io/fs"
"path/filepath"
"strings"
"codeberg.org/snonux/play/internal/clock"
"codeberg.org/snonux/play/internal/model"
"codeberg.org/snonux/play/internal/probe"
"codeberg.org/snonux/play/internal/repository"
"codeberg.org/snonux/play/internal/thumb"
)
// Scanner defines the filesystem scanning contract.
type Scanner interface {
Scan(ctx context.Context, root string) error
}
// FSScanner recursively scans media root for sets and media files.
type FSScanner struct {
store repository.ScannerStore
prober probe.Prober
thumbGen thumb.Generator
clock clock.Clock
mediaRoot string
fs FS
}
// NewFSScanner creates a filesystem scanner with injected dependencies.
func NewFSScanner(store repository.ScannerStore, prober probe.Prober, thumbGen thumb.Generator, clk clock.Clock, mediaRoot string) Scanner {
return &FSScanner{
store: store,
prober: prober,
thumbGen: thumbGen,
clock: clk,
mediaRoot: mediaRoot,
fs: osFS{},
}
}
// Scan walks immediate subdirectories of root, treating each as a set.
func (s *FSScanner) Scan(ctx context.Context, root string) error {
entries, err := s.fs.ReadDir(root)
if err != nil {
return fmt.Errorf("read media root %q: %w", root, err)
}
for _, entry := range entries {
if !entry.IsDir() {
continue
}
setPath := filepath.Join(root, entry.Name())
if err := s.scanSet(ctx, root, setPath); err != nil {
return err
}
}
return nil
}
func (s *FSScanner) scanSet(ctx context.Context, root, setPath string) error {
setName := filepath.Base(setPath)
relRoot, err := filepath.Rel(root, setPath)
if err != nil {
relRoot = setName
}
sets, err := s.store.ListSets(ctx)
if err != nil {
return fmt.Errorf("list sets for %q: %w", setName, err)
}
var setID int64
var set *model.Set
for i := range sets {
if sets[i].RootPath == relRoot {
set = &sets[i]
break
}
}
if set == nil {
newSet := &model.Set{
Name: setName,
RootPath: relRoot,
CreatedAt: s.clock.Now(),
}
id, err := s.store.CreateSet(ctx, newSet)
if err != nil {
return fmt.Errorf("create set %q: %w", setName, err)
}
setID = id
} else {
setID = set.ID
}
// Build map of existing media for quick lookup.
existing := make(map[string]bool)
mediaList, err := s.store.ListMedia(ctx, repository.MediaFilter{SetID: &setID})
if err != nil {
return fmt.Errorf("list media for set %q: %w", setName, err)
}
for _, m := range mediaList {
existing[m.RelPath] = true
}
// Walk set directory recursively.
walkErr := s.fs.WalkDir(setPath, func(path string, d fs.DirEntry, err error) error {
if err != nil {
return fmt.Errorf("walk %q: %w", path, err)
}
if d.IsDir() {
return nil
}
if !isMediaFile(path) {
return nil
}
relPath, err := filepath.Rel(setPath, path)
if err != nil {
return fmt.Errorf("rel path for %q: %w", path, err)
}
if existing[relPath] {
return nil
}
info, err := s.fs.Stat(path)
if err != nil {
return fmt.Errorf("stat %q: %w", path, err)
}
meta, err := s.prober.Probe(ctx, path)
if err != nil {
// Skip unprobeable/corrupt files instead of aborting the whole scan.
fmt.Printf("[scanner] skipping unprobeable file %q: %v\n", path, err)
return nil
}
meta.FileSizeBytes = info.Size()
mediaType := mediaTypeFromExt(path)
var thumbnailPath string
if mediaType == model.MediaTypeVideo {
thumbDir := filepath.Join(setPath, ".thumbnails")
if err := s.fs.MkdirAll(thumbDir, 0o755); err != nil {
return fmt.Errorf("mkdir thumbnails %q: %w", thumbDir, err)
}
thumbName := strings.TrimSuffix(filepath.Base(path), filepath.Ext(path)) + ".jpg"
thumbnailPath = filepath.Join(thumbDir, thumbName)
if err := s.thumbGen.Generate(ctx, path, thumbnailPath, meta.Duration); err != nil {
// Skip thumbnail generation errors (e.g., corrupt or audio-only video files)
// and continue scanning without a thumbnail.
fmt.Printf("[scanner] skipping thumbnail for %q: %v\n", path, err)
thumbnailPath = ""
}
}
media := &model.Media{
SetID: setID,
RelPath: relPath,
FileName: filepath.Base(path),
AbsPath: path,
Type: mediaType,
Duration: meta.Duration,
Codec: meta.Codec,
Resolution: meta.Resolution,
Bitrate: meta.Bitrate,
FileSizeBytes: meta.FileSizeBytes,
ThumbnailPath: thumbnailPath,
CreatedAt: s.clock.Now(),
}
if _, err := s.store.CreateMedia(ctx, media); err != nil {
return fmt.Errorf("create media %q: %w", path, err)
}
return nil
})
if walkErr != nil {
return fmt.Errorf("scan set %q: %w", setName, walkErr)
}
return nil
}
var mediaExtensions = map[string]struct{}{
".mp4": {}, ".mkv": {}, ".avi": {}, ".mov": {}, ".webm": {},
".mp3": {}, ".flac": {}, ".wav": {}, ".aac": {}, ".ogg": {}, ".m4a": {}, ".opus": {},
}
func isMediaFile(path string) bool {
base := filepath.Base(path)
// Skip macOS resource fork files (._*)
if strings.HasPrefix(base, "._") {
return false
}
ext := strings.ToLower(filepath.Ext(path))
_, ok := mediaExtensions[ext]
return ok
}
func mediaTypeFromExt(path string) model.MediaType {
ext := strings.ToLower(filepath.Ext(path))
switch ext {
case ".mp4", ".mkv", ".avi", ".mov", ".webm":
return model.MediaTypeVideo
default:
return model.MediaTypeAudio
}
}
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