提取cover服务

internal/service/cover_svc.go

@@ -0,0 +1,54 @@
+package service
+
+import (
+	"butterfliu/config"
+	"butterfliu/internal/model"
+	"butterfliu/internal/repository"
+	"butterfliu/internal/util"
+	"errors"
+	"path"
+	"strconv"
+)
+
+type CoverService struct {
+	mediaRepo *repository.MediaRepository
+	songRepo  *repository.SongRepository
+	albumRepo *repository.AlbumRepository
+}
+
+func NewCoverService(mediaRepo *repository.MediaRepository, songRepo *repository.SongRepository, albumRepo *repository.AlbumRepository) *CoverService {
+	return &CoverService{
+		mediaRepo: mediaRepo,
+		songRepo:  songRepo,
+		albumRepo: albumRepo,
+	}
+}
+
+func (s *CoverService) getMediaFile(id int) (model.MediaFile, error) {
+	song, err := s.songRepo.Get(id)
+	if err != nil {
+		return model.MediaFile{}, err
+	}
+	return s.mediaRepo.Get(song.MediaFileID)
+}
+
+func (s *CoverService) GetSongCover(id int) (string, error) {
+	file, err := s.getMediaFile(id)
+	if err != nil {
+		return "", err
+	}
+	util.ExtractCover(file.Path, id)
+	conf := config.LoadConfig()
+	return path.Join(conf.GetCachePath("cover"), strconv.Itoa(id)+".jpg"), nil
+}
+
+func (s *CoverService) GetAlbumCover(id int) (string, error) {
+	songs, err := s.albumRepo.GetSongIDs(id)
+	if err != nil {
+		return "", err
+	}
+	if len(songs) == 0 {
+		return "", errors.New("no songs found for album")
+	}
+	return s.GetSongCover(songs[0])
+}