package writecache import ( "errors" "fmt" "github.com/nspcc-dev/neofs-sdk-go/object" "go.etcd.io/bbolt" ) // ErrNoDefaultBucket is returned by IterateDB when default bucket for objects is missing. var ErrNoDefaultBucket = errors.New("no default bucket") // IterateDB iterates over all objects stored in bbolt.DB instance and passes them to f until error return. // It is assumed that db is an underlying database of some WriteCache instance. // // Returns ErrNoDefaultBucket if there is no default bucket in db. // // DB must not be nil and should be opened. func IterateDB(db *bbolt.DB, f func(*object.Address) error) error { return db.View(func(tx *bbolt.Tx) error { b := tx.Bucket(defaultBucket) if b == nil { return ErrNoDefaultBucket } var addr *object.Address return b.ForEach(func(k, v []byte) error { if addr == nil { addr = object.NewAddress() } err := addr.Parse(string(k)) if err != nil { return fmt.Errorf("could not parse object address: %w", err) } return f(addr) }) }) }