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package service
import (
"context"
"errors"
"fmt"
"io"
mrand "math/rand"
"os"
"path/filepath"
"strings"
"codeberg.org/snonux/player/internal/clock"
"codeberg.org/snonux/player/internal/mediatype"
"codeberg.org/snonux/player/internal/model"
"codeberg.org/snonux/player/internal/probe"
"codeberg.org/snonux/player/internal/repository"
"codeberg.org/snonux/player/internal/thumb"
)
// writeService handles mutations such as upload, soft-delete and restore.
type writeService struct {
store repository.WriteServiceStore
clock clock.Clock
mediaRoot string
thumbGen thumb.Generator
prober probe.Prober
helper *accessHelper
}
// NewWriteService creates a WriteService.
func NewWriteService(store repository.WriteServiceStore, clk clock.Clock, mediaRoot string, thumbGen thumb.Generator, prober probe.Prober, helper *accessHelper) MediaWriteService {
return &writeService{
store: store,
clock: clk,
mediaRoot: mediaRoot,
thumbGen: thumbGen,
prober: prober,
helper: helper,
}
}
func (s *writeService) SoftDeleteMedia(ctx context.Context, mediaID, userID int64) error {
_, err := s.helper.verifyModifyAccess(ctx, mediaID, userID)
if err != nil {
return err
}
return s.store.SoftDeleteMedia(ctx, mediaID)
}
func (s *writeService) RestoreMedia(ctx context.Context, mediaID, userID int64) error {
_, err := s.helper.verifyModifyAccess(ctx, mediaID, userID)
if err != nil {
return err
}
return s.store.RestoreMedia(ctx, mediaID)
}
func (s *writeService) UploadMedia(ctx context.Context, setID, userID int64, filename string, data io.Reader, size int64) (*model.Media, error) {
set, err := s.store.GetSetByID(ctx, setID)
if err != nil {
return nil, fmt.Errorf("get set: %w", err)
}
if set == nil {
return nil, ErrNotFound
}
if err := s.helper.verifySetModifyAccess(ctx, setID, userID); err != nil {
return nil, err
}
if !mediatype.IsSupportedExt(filename) {
return nil, fmt.Errorf("%w: %s", ErrUnsupportedExtension, filepath.Ext(filename))
}
dir := filepath.Clean(filepath.Join(s.mediaRoot, set.RootPath))
if err := os.MkdirAll(dir, 0o755); err != nil {
return nil, fmt.Errorf("mkdir: %w", err)
}
path := uniqueFilename(dir, filename)
if !strings.HasPrefix(filepath.Clean(path), filepath.Clean(dir)+string(filepath.Separator)) {
return nil, errors.New("invalid filename")
}
media, err := s.saveUploadedMedia(ctx, setID, path, data, size)
if err != nil {
os.Remove(path)
return nil, err
}
if err := ImportMediaFile(ctx, s.store, media, s.prober, s.thumbGen); err != nil {
os.Remove(path)
s.store.HardDeleteMedia(ctx, media.ID)
return nil, err
}
return media, nil
}
func (s *writeService) RegenerateThumbnail(ctx context.Context, mediaID, userID int64) error {
media, err := s.helper.verifyModifyAccess(ctx, mediaID, userID)
if err != nil {
return err
}
if media.Type != model.MediaTypeVideo && media.Type != model.MediaTypeImage {
return errors.New("thumbnails can only be generated for video and image files")
}
meta, err := s.prober.Probe(ctx, media.AbsPath)
if err != nil {
return fmt.Errorf("probe media: %w", err)
}
thumbDir := filepath.Join(filepath.Dir(media.AbsPath), ".thumbnails")
if err := os.MkdirAll(thumbDir, 0o755); err != nil {
return fmt.Errorf("mkdir thumbnails: %w", err)
}
thumbName := strings.TrimSuffix(filepath.Base(media.AbsPath), filepath.Ext(media.AbsPath)) + ".jpg"
thumbnailPath := filepath.Join(thumbDir, thumbName)
if err := s.thumbGen.Generate(ctx, media.AbsPath, thumbnailPath, meta.Duration); err != nil {
return fmt.Errorf("generate thumbnail: %w", err)
}
media.ThumbnailPath = thumbnailPath
if err := s.store.UpdateMedia(ctx, media); err != nil {
return fmt.Errorf("update media: %w", err)
}
return nil
}
func (s *writeService) RegenerateSetCover(ctx context.Context, setID int64, folder string, userID int64) error {
if err := s.helper.verifySetModifyAccess(ctx, setID, userID); err != nil {
return err
}
set, err := s.store.GetSetByID(ctx, setID)
if err != nil {
return fmt.Errorf("get set: %w", err)
}
if set == nil {
return ErrNotFound
}
media, err := s.store.ListMedia(ctx, repository.MediaFilter{SetID: &setID})
if err != nil {
return fmt.Errorf("list media: %w", err)
}
prefix := filepath.ToSlash(strings.Trim(folder, "/"))
var candidates []model.Media
for _, m := range media {
if m.DeletedAt != nil {
continue
}
rel := filepath.ToSlash(m.RelPath)
if prefix != "" {
if !strings.HasPrefix(rel, prefix+"/") {
continue
}
suffix := strings.TrimPrefix(rel, prefix+"/")
if strings.Contains(suffix, "/") {
continue
}
} else if strings.Contains(rel, "/") {
continue
}
if m.Type == model.MediaTypeVideo {
candidates = append(candidates, m)
}
}
if len(candidates) == 0 {
return errors.New("no video files available for cover")
}
candidate := candidates[0]
if len(candidates) > 1 {
candidate = candidates[mrand.Intn(len(candidates))]
}
baseDir := filepath.Join(s.mediaRoot, filepath.FromSlash(set.RootPath))
if prefix != "" {
baseDir = filepath.Join(baseDir, filepath.FromSlash(prefix))
}
coverPath := filepath.Join(filepath.Clean(baseDir), ".cover.jpg")
meta, err := s.prober.Probe(ctx, candidate.AbsPath)
if err != nil {
return fmt.Errorf("probe cover candidate: %w", err)
}
if err := s.thumbGen.Generate(ctx, candidate.AbsPath, coverPath, meta.Duration); err != nil {
return fmt.Errorf("generate cover: %w", err)
}
return nil
}
func (s *writeService) saveUploadedMedia(ctx context.Context, setID int64, path string, data io.Reader, size int64) (*model.Media, error) {
f, err := os.Create(path)
if err != nil {
return nil, fmt.Errorf("create file: %w", err)
}
defer f.Close()
n, err := io.Copy(f, data)
if err != nil {
return nil, fmt.Errorf("write file: %w", err)
}
now := s.clock.Now()
media := &model.Media{
SetID: setID,
RelPath: filepath.Base(path),
FileName: filepath.Base(path),
AbsPath: path,
Type: mediatype.TypeForExt(filepath.Base(path)),
FileSizeBytes: n,
CreatedAt: now,
}
_ = size
id, err := s.store.CreateMedia(ctx, media)
if err != nil {
return nil, fmt.Errorf("create media: %w", err)
}
media.ID = id
return media, nil
}
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