feat: rename file only when storagePath exists

storage/alist/alist.go

@@ -147,3 +147,8 @@ func (a *Alist) NotSupportStream() string {
 func (a *Alist) JoinStoragePath(task types.Task) string {
 	return path.Join(a.config.BasePath, task.StoragePath)
 }
+
+func (a *Alist) Exists(ctx context.Context, storagePath string) bool {
+	// TODO: Implement it.
+	return false
+}

storage/local/local.go

@@ -63,3 +63,11 @@ func (l *Local) Save(ctx context.Context, r io.Reader, storagePath string) error
 	_, err = io.Copy(file, r)
 	return err
 }
+
+func (l *Local) Exists(ctx context.Context, storagePath string) bool {
+	absPath, err := filepath.Abs(storagePath)
+	if err != nil {
+		return false
+	}
+	return fileutil.IsExist(absPath)
+}

storage/minio/client.go

@@ -70,3 +70,17 @@ func (m *Minio) Save(ctx context.Context, r io.Reader, storagePath string) error
 
 	return nil
 }
+
+func (m *Minio) Exists(ctx context.Context, storagePath string) bool {
+	common.Log.Debugf("Checking if file exists at %s", storagePath)
+	// TODO: test it.
+	_, err := m.client.StatObject(ctx, m.config.BucketName, storagePath, minio.StatObjectOptions{})
+	if err != nil {
+		if minio.ToErrorResponse(err).Code == "NoSuchKey" {
+			return false // File does not exist
+		}
+		return false
+	}
+
+	return true
+}

storage/storage.go

@@ -21,6 +21,7 @@ type Storage interface {
 	Name() string
 	JoinStoragePath(task types.Task) string
 	Save(ctx context.Context, reader io.Reader, storagePath string) error
+	Exists(ctx context.Context, storagePath string) bool
 }
 
 type StorageNotSupportStream interface {

storage/webdav/errs.go

@@ -5,4 +5,5 @@ import "errors"
 var (
 	ErrFailedToCreateDirectory = errors.New("webdav: failed to create directory")
 	ErrFailedToWriteFile       = errors.New("webdav: failed to write file")
+	ErrFailedToCheckFileExists = errors.New("webdav: failed to check if file exists")
 )

storage/webdav/webdav.go

@@ -57,3 +57,13 @@ func (w *Webdav) Save(ctx context.Context, r io.Reader, storagePath string) erro
 	}
 	return nil
 }
+
+func (w *Webdav) Exists(ctx context.Context, storagePath string) bool {
+	common.Log.Debugf("Checking if file exists at %s", storagePath)
+	exists, err := w.client.Exists(ctx, storagePath)
+	if err != nil {
+		common.Log.Errorf("Failed to check if file exists at %s: %v", storagePath, err)
+		return false
+	}
+	return exists
+}