[#233] services/object: Implement new Get algorithm

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/services/object/get/local.go

@@ -0,0 +1,37 @@
+package getsvc
+
+import (
+	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-node/pkg/core/object"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+)
+
+func (exec *execCtx) executeLocal() {
+	var err error
+
+	exec.collectedObject, err = exec.svc.localStorage.Get(exec.address())
+
+	var errSplitInfo *objectSDK.SplitInfoError
+
+	switch {
+	default:
+		exec.status = statusUndefined
+		exec.err = err
+
+		exec.log.Debug("local get failed",
+			zap.String("error", err.Error()),
+		)
+	case err == nil:
+		exec.status = statusOK
+		exec.err = nil
+		exec.writeCollectedObject()
+	case errors.Is(err, object.ErrAlreadyRemoved):
+		exec.status = statusINHUMED
+		exec.err = object.ErrAlreadyRemoved
+	case errors.As(err, &errSplitInfo):
+		exec.status = statusVIRTUAL
+		mergeSplitInfo(exec.splitInfo(), errSplitInfo.SplitInfo())
+		exec.err = objectSDK.NewSplitInfoError(exec.infoSplit)
+	}
+}