func (s *Storage) DeleteThumbnails(parentAttId string, blob tenpu.BlobStorage, meta tenpu.MetaStorage) (err error) {
thumbs := s.ThumbnailByParentId(parentAttId)
// log.Println("Delete thumbnail num:", len(thumbs))
var thumbAttIds []string
for _, thumb := range thumbs {
thumbAttIds = append(thumbAttIds, thumb.BodyId)
}
for _, thumbAttId := range thumbAttIds {
err = blob.Delete(thumbAttId)
if err != nil && err != mgo.ErrNotFound {
return
}
err = meta.Remove(thumbAttId)
if err != nil {
return
}
}
err = s.RemoveAll(parentAttId)
return
}
func resizeAndStore(storage tenpu.BlobStorage, meta tenpu.MetaStorage, thumbnailStorage *Storage, att *tenpu.Attachment, spec *ThumbnailSpec, thumbName string, id string) (thumb *Thumbnail, err error) {
var buf bytes.Buffer
storage.Copy(att, &buf)
if buf.Len() == 0 {
return
}
thumbAtt := &tenpu.Attachment{}
body, width, height, err := resizeThumbnail(&buf, spec)
if err != nil {
return
}
err = storage.Put(att.Filename, att.ContentType, body, thumbAtt)
if err != nil {
return
}
err = meta.Put(thumbAtt)
if err != nil {
return
}
thumb = &Thumbnail{
Name: thumbName,
ParentId: id,
BodyId: thumbAtt.Id,
Width: int64(width),
Height: int64(height),
}
err = thumbnailStorage.Put(thumb)
return
}