[#1793] node: Serve NetmapService.NetmapSnapshot RPC

There is no more need to serve the same request on Control API.

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

cmd/neofs-cli/modules/netmap/snapshot.go

@@ -0,0 +1,63 @@
+package netmap
+
+import (
+	"encoding/hex"
+
+	internalclient "github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/client"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/common"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/commonflags"
+	"github.com/nspcc-dev/neofs-node/cmd/neofs-cli/internal/key"
+	"github.com/nspcc-dev/neofs-sdk-go/netmap"
+	"github.com/spf13/cobra"
+)
+
+var snapshotCmd = &cobra.Command{
+	Use:   "snapshot",
+	Short: "Request current local snapshot of the network map",
+	Long:  `Request current local snapshot of the network map`,
+	Run: func(cmd *cobra.Command, args []string) {
+		p := key.GetOrGenerate(cmd)
+		cli := internalclient.GetSDKClientByFlag(cmd, p, commonflags.RPC)
+
+		var prm internalclient.NetMapSnapshotPrm
+		prm.SetClient(cli)
+
+		res, err := internalclient.NetMapSnapshot(prm)
+		common.ExitOnErr(cmd, "rpc error: %w", err)
+
+		prettyPrintNetMap(cmd, res.NetMap())
+	},
+}
+
+func initSnapshotCmd() {
+	commonflags.Init(snapshotCmd)
+	commonflags.InitAPI(snapshotCmd)
+}
+
+func prettyPrintNetMap(cmd *cobra.Command, nm netmap.NetMap) {
+	cmd.Println("Epoch:", nm.Epoch())
+
+	nodes := nm.Nodes()
+	for i := range nodes {
+		var strState string
+
+		switch {
+		case nodes[i].IsOnline():
+			strState = "ONLINE"
+		case nodes[i].IsOffline():
+			strState = "OFFLINE"
+		}
+
+		cmd.Printf("Node %d: %s %s ", i+1, hex.EncodeToString(nodes[i].PublicKey()), strState)
+
+		netmap.IterateNetworkEndpoints(nodes[i], func(endpoint string) {
+			cmd.Printf("%s ", endpoint)
+		})
+
+		cmd.Println()
+
+		nodes[i].IterateAttributes(func(key, value string) {
+			cmd.Printf("\t%s: %s\n", key, value)
+		})
+	}
+}