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package service
import (
"context"
"errors"
"fmt"
"io"
"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 := s.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) uniqueFilename(dir, filename string) string {
filename = filepath.Base(filename)
if filename == "." || filename == ".." || filename == "" {
return ""
}
ext := filepath.Ext(filename)
base := strings.TrimSuffix(filename, ext)
candidate := filepath.Join(dir, filename)
if _, err := os.Stat(candidate); os.IsNotExist(err) {
return candidate
}
for i := 1; ; i++ {
candidate = filepath.Join(dir, fmt.Sprintf("%s(%d)%s", base, i, ext))
if _, err := os.Stat(candidate); os.IsNotExist(err) {
return candidate
}
}
}
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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