88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
package localstore
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import (
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"encoding/binary"
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"io"
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objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
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"github.com/nspcc-dev/neofs-node/pkg/core/object"
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"github.com/pkg/errors"
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)
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// ObjectMeta represents meta information about
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// the object that is stored in meta storage.
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type ObjectMeta struct {
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head *object.Object
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savedAtEpoch uint64
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}
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// SavedAtEpoch returns the number of epoch
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// at which the object was saved locally.
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func (m *ObjectMeta) SavedAtEpoch() uint64 {
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if m != nil {
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return m.savedAtEpoch
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}
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return 0
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}
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// Head returns the object w/o payload.
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func (m *ObjectMeta) Head() *object.Object {
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if m != nil {
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return m.head
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}
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return nil
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}
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// AddressFromMeta extracts the Address from object meta.
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func AddressFromMeta(m *ObjectMeta) *objectSDK.Address {
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return m.Head().Address()
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}
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func metaFromObject(o *object.Object) *ObjectMeta {
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// FIXME: remove hard-code
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meta := new(ObjectMeta)
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meta.savedAtEpoch = 10
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raw := object.NewRaw()
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raw.SetID(o.GetID())
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raw.SetContainerID(o.GetContainerID())
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raw.SetOwnerID(o.GetOwnerID())
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// TODO: set other meta fields
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meta.head = raw.Object()
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return meta
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}
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func metaToBytes(m *ObjectMeta) ([]byte, error) {
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data := make([]byte, 8)
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binary.BigEndian.PutUint64(data, m.savedAtEpoch)
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objBytes, err := objectBytes(m.head)
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if err != nil {
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return nil, err
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}
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return append(data, objBytes...), nil
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}
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func metaFromBytes(data []byte) (*ObjectMeta, error) {
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if len(data) < 8 {
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return nil, io.ErrUnexpectedEOF
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}
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obj, err := object.FromBytes(data[8:])
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if err != nil {
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return nil, errors.Wrap(err, "could not get object address from bytes")
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}
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meta := new(ObjectMeta)
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meta.savedAtEpoch = binary.BigEndian.Uint64(data)
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meta.head = obj
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return meta, nil
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}
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