[#80] storageroup: Implement function to collect structure from container

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich 2020-12-17 19:13:34 +03:00 committed by Alex Vanin
parent 44466f4a29
commit 43ee94a572

View file

@ -0,0 +1,56 @@
package storagegroup
import (
"github.com/nspcc-dev/neofs-api-go/pkg"
"github.com/nspcc-dev/neofs-api-go/pkg/client"
"github.com/nspcc-dev/neofs-api-go/pkg/container"
objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
"github.com/nspcc-dev/neofs-api-go/pkg/storagegroup"
"github.com/nspcc-dev/neofs-node/pkg/core/object"
objutil "github.com/nspcc-dev/neofs-node/pkg/services/object/util"
"github.com/nspcc-dev/tzhash/tz"
)
// CollectMembers creates new storage group structure and fills it
// with information about members collected via HeadReceiver.
//
// Resulting storage group consists of physically stored objects only.
func CollectMembers(r objutil.HeadReceiver, cid *container.ID, members []*objectSDK.ID) (*storagegroup.StorageGroup, error) {
var (
sumPhySize uint64
phyMembers []*objectSDK.ID
phyHashes [][]byte
addr = objectSDK.NewAddress()
sg = storagegroup.New()
)
addr.SetContainerID(cid)
for i := range members {
addr.SetObjectID(members[i])
if err := objutil.IterateAllSplitLeaves(r, addr, func(leaf *object.Object) {
phyMembers = append(phyMembers, leaf.ID())
sumPhySize += leaf.PayloadSize()
phyHashes = append(phyHashes, leaf.PayloadHomomorphicHash().Sum())
}); err != nil {
return nil, err
}
}
sumHash, err := tz.Concat(phyHashes)
if err != nil {
return nil, err
}
cs := pkg.NewChecksum()
tzHash := [client.TZSize]byte{}
copy(tzHash[:], sumHash)
cs.SetTillichZemor(tzHash)
sg.SetMembers(phyMembers)
sg.SetValidationDataSize(sumPhySize)
sg.SetValidationDataHash(cs)
return sg, nil
}