feat: add peer connections subcommand

Author: bryanchriswhite

app/client/cli/peer/connections.go

@@ -0,0 +1,68 @@
+package peer
+
+import (
+	"fmt"
+	"log"
+	"strconv"
+
+	libp2pNetwork "github.com/libp2p/go-libp2p/core/network"
+	"github.com/spf13/cobra"
+
+	"github.com/pokt-network/pocket/app/client/cli/helpers"
+	"github.com/pokt-network/pocket/p2p/utils"
+	"github.com/pokt-network/pocket/shared/modules"
+)
+
+var (
+	printConnectionsHeader = []string{"Peer ID", "Multiaddr", "Opened", "Direction", "NumStreams"}
+
+	connectionsCmd = &cobra.Command{
+		Use:   "connections",
+		Short: "Print open peer connections",
+		RunE:  connectionsRunE,
+	}
+)
+
+func init() {
+	PeerCmd.AddCommand(connectionsCmd)
+}
+
+func connectionsRunE(cmd *cobra.Command, _ []string) error {
+	bus, ok := helpers.GetValueFromCLIContext[modules.Bus](cmd, helpers.BusCLICtxKey)
+	if !ok {
+		log.Fatal("unable to get bus from context")
+	}
+
+	p2pModule := bus.GetP2PModule()
+	if p2pModule == nil {
+		return fmt.Errorf("no p2p module found on the bus")
+	}
+
+	conns := p2pModule.GetConnections()
+	if err := printConnections(conns); err != nil {
+		return fmt.Errorf("printing connections: %w", err)
+	}
+
+	return nil
+}
+
+func peerConnsRowConsumerFactory(conns []libp2pNetwork.Conn) utils.RowConsumer {
+	return func(provideRow utils.RowProvider) error {
+		for _, conn := range conns {
+			err := provideRow(
+				conn.RemotePeer().String(),
+				conn.RemoteMultiaddr().String(),
+				conn.Stat().Opened.String(),
+				conn.Stat().Direction.String(),
+				strconv.Itoa(conn.Stat().NumStreams),
+			)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+}
+func printConnections(conns []libp2pNetwork.Conn) error {
+	return utils.PrintTable(printConnectionsHeader, peerConnsRowConsumerFactory(conns))
+}