[#172] client/container: Support listing containers with `containersOf`

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/morph/client/container/client.go

@@ -22,12 +22,13 @@ type Client struct {
 }
 
 const (
-	putMethod     = "put"
-	deleteMethod  = "delete"
-	getMethod     = "get"
-	listMethod    = "list"
-	eaclMethod    = "eACL"
-	setEACLMethod = "setEACL"
+	putMethod          = "put"
+	deleteMethod       = "delete"
+	getMethod          = "get"
+	listMethod         = "list"
+	containersOfMethod = "containersOf"
+	eaclMethod         = "eACL"
+	setEACLMethod      = "setEACL"
 
 	startEstimationMethod = "startContainerEstimation"
 	stopEstimationMethod  = "stopContainerEstimation"

pkg/morph/client/container/containers_of.go

@@ -0,0 +1,53 @@
+package container
+
+import (
+	"errors"
+	"fmt"
+
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/morph/client"
+	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
+	"github.com/nspcc-dev/neo-go/pkg/rpcclient/unwrap"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
+)
+
+// ContainersOf returns a list of container identifiers belonging
+// to the specified user of FrostFS system. If idUser is nil, returns the list of all containers.
+//
+// If remote RPC does not support neo-go session API, fallback to List() method.
+func (c *Client) ContainersOf(idUser *user.ID) ([]cid.ID, error) {
+	var rawID []byte
+
+	if idUser != nil {
+		rawID = idUser.WalletBytes()
+	}
+
+	var cidList []cid.ID
+	cb := func(item stackitem.Item) error {
+		rawID, err := client.BytesFromStackItem(item)
+		if err != nil {
+			return fmt.Errorf("could not get byte array from stack item (%s): %w", containersOfMethod, err)
+		}
+
+		var id cid.ID
+
+		err = id.Decode(rawID)
+		if err != nil {
+			return fmt.Errorf("decode container ID: %w", err)
+		}
+
+		cidList = append(cidList, id)
+		return nil
+	}
+
+	cnrHash := c.client.ContractAddress()
+	err := c.client.Morph().TestInvokeIterator(cb, cnrHash, containersOfMethod, rawID)
+	if err != nil {
+		if errors.Is(err, unwrap.ErrNoSessionID) {
+			return c.List(idUser)
+		}
+		return nil, err
+	}
+
+	return cidList, nil
+}