package blobstor import ( "errors" "github.com/nspcc-dev/neofs-api-go/pkg/object" "github.com/nspcc-dev/neofs-node/pkg/local_object_storage/blobstor/fstree" ) // ExistsPrm groups the parameters of Exists operation. type ExistsPrm struct { address } // ExistsRes groups resulting values of Exists operation. type ExistsRes struct { exists bool } // Exists returns the fact that the object is in BLOB storage. func (r ExistsRes) Exists() bool { return r.exists } // Exists checks if object is presented in BLOB storage. // // Returns any error encountered that did not allow // to completely check object existence. func (b *BlobStor) Exists(prm *ExistsPrm) (*ExistsRes, error) { // check presence in shallow dir first (cheaper) exists, err := b.existsBig(prm.addr) if !exists { // TODO: do smth if err != nil // check presence in blobovnicza exists, err = b.existsSmall(prm.addr) } if err != nil { return nil, err } return &ExistsRes{ exists: exists, }, err } // checks if object is presented in shallow dir. func (b *BlobStor) existsBig(addr *object.Address) (bool, error) { _, err := b.fsTree.Exists(addr) if errors.Is(err, fstree.ErrFileNotFound) { return false, nil } return err == nil, err } // checks if object is presented in blobovnicza. func (b *BlobStor) existsSmall(addr *object.Address) (bool, error) { // TODO: implement return false, nil }