[#165] cli: Refactor collectObjectRelatives

Resolve funlen linter

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

cmd/frostfs-cli/modules/object/util.go

@@ -339,8 +339,6 @@ func initFlagSession(cmd *cobra.Command, verb string) {
 // container.
 //
 // The object itself is not included in the result.
-//
-// nolint: funlen
 func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID, obj oid.ID) []oid.ID {
 	common.PrintVerbose(cmd, "Fetching raw object header...")
 
@@ -372,13 +370,28 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 
 	splitInfo := errSplit.SplitInfo()
 
+	if members, ok := tryGetSplitMembersByLinkingObject(cmd, splitInfo, prmHead, cnr); ok {
+		return members
+	}
+
+	if members, ok := tryGetSplitMembersBySplitID(cmd, splitInfo, cli, cnr); ok {
+		return members
+	}
+
+	return tryRestoreChainInReverse(cmd, splitInfo, prmHead, cli, cnr, obj)
+}
+
+func tryGetSplitMembersByLinkingObject(cmd *cobra.Command, splitInfo *object.SplitInfo, prmHead internal.HeadObjectPrm, cnr cid.ID) ([]oid.ID, bool) {
 	// collect split chain by the descending ease of operations (ease is evaluated heuristically).
 	// If any approach fails, we don't try the next since we assume that it will fail too.
 
 	if idLinking, ok := splitInfo.Link(); ok {
 		common.PrintVerbose(cmd, "Collecting split members using linking object %s...", idLinking)
 
+		var addrObj oid.Address
+		addrObj.SetContainer(cnr)
 		addrObj.SetObject(idLinking)
+
 		prmHead.SetAddress(addrObj)
 		prmHead.SetRawFlag(false)
 		// client is already set
@@ -390,14 +403,17 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 			common.PrintVerbose(cmd, "Received split members from the linking object: %v", children)
 
 			// include linking object
-			return append(children, idLinking)
+			return append(children, idLinking), true
 		}
 
 		// linking object is not required for
 		// object collecting
 		common.PrintVerbose(cmd, "failed to get linking object's header: %w", err)
 	}
+	return nil, false
+}
 
+func tryGetSplitMembersBySplitID(cmd *cobra.Command, splitInfo *object.SplitInfo, cli *client.Client, cnr cid.ID) ([]oid.ID, bool) {
 	if idSplit := splitInfo.SplitID(); idSplit != nil {
 		common.PrintVerbose(cmd, "Collecting split members by split ID...")
 
@@ -412,12 +428,18 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 		res, err := internal.SearchObjects(prm)
 		commonCmd.ExitOnErr(cmd, "failed to search objects by split ID: %w", err)
 
-		members := res.IDList()
+		parts := res.IDList()
 
 		common.PrintVerbose(cmd, "Found objects by split ID: %v", res.IDList())
 
-		return members
+		return parts, true
 	}
+	return nil, false
+}
+
+func tryRestoreChainInReverse(cmd *cobra.Command, splitInfo *object.SplitInfo, prmHead internal.HeadObjectPrm, cli *client.Client, cnr cid.ID, obj oid.ID) []oid.ID {
+	var addrObj oid.Address
+	addrObj.SetContainer(cnr)
 
 	idMember, ok := splitInfo.LastPart()
 	if !ok {
@@ -427,6 +449,8 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 	common.PrintVerbose(cmd, "Traverse the object split chain in reverse...", idMember)
 
 	var res *internal.HeadObjectRes
+	var err error
+
 	chain := []oid.ID{idMember}
 	chainSet := map[oid.ID]struct{}{idMember: {}}
 
@@ -437,6 +461,7 @@ func collectObjectRelatives(cmd *cobra.Command, cli *client.Client, cnr cid.ID,
 		common.PrintVerbose(cmd, "Reading previous element of the split chain member %s...", idMember)
 
 		addrObj.SetObject(idMember)
+		prmHead.SetAddress(addrObj)
 
 		res, err = internal.HeadObject(prmHead)
 		commonCmd.ExitOnErr(cmd, "failed to read split chain member's header: %w", err)