func putVolumeSingle(call *Call, isbn isbn13.ISBN13) (info *data.BookMetaData, err error) {
call.Context.Debugf("Updating %d", isbn)
decode := json.NewDecoder(call.Request.Body)
info = new(data.BookMetaData)
if err = decode.Decode(info); err == nil {
call.Context.Debugf("Raw decoded entity: %v", info)
info.ISBN = isbn.String()
normalize(call, info)
call.Context.Debugf("Normalized decoded entity: %v", info)
persistence.UpdateBookshelf(call.Context, func(t *tx.Transaction, shelf *data.Bookshelf) error {
if ptr := shelf.LookupInfo(isbn); ptr != nil {
*ptr = *info
t.Put = []tx.KeyDeriver{ptr}
} else {
info.Parent = shelf
shelf.Books = append(shelf.Books, *info)
t.Put = []tx.KeyDeriver{info}
}
return nil
})
}
return info, err
}
func deleteVolumeSingle(call *Call, isbn isbn13.ISBN13) (info *data.BookMetaData, err error) {
call.Context.Infof("Deleting ISBN %d", isbn)
err = persistence.UpdateBookshelf(call.Context, func(t *tx.Transaction, shelf *data.Bookshelf) error {
for i := range shelf.Books {
if ptr := &shelf.Books[i]; ptr.ISBN == isbn.String() {
shelf.Books = append(shelf.Books[:i], shelf.Books[i+1:]...)
t.Delete = []tx.KeyDeriver{ptr}
return nil
}
}
call.StatusCode = http.StatusNotFound
return errors.New("ISBN not found")
})
return
}