Additions and enhancements (#14)

- add interactive API repl
- enhance cluster status output (use -v)
- add more ccr commands
- refactoring

pkg/es/ccr.go

@@ -85,3 +85,50 @@ func CcrStatus(conf *cfg.Config, leader, follower string) error {
 
 	return nil
 }
+
+func CcrRemoteInfo(conf *cfg.Config, index string) error {
+	res, err := conf.DefaultCluster.ES.Cluster.RemoteInfo().
+		Header("content-type", "application/json").
+		Header("accept", "application/json").
+		Do(context.Background())
+	if err != nil {
+		return fmt.Errorf("failed to retrieve follower info: %s", err)
+	}
+
+	slog.Debug("ccr remote info", "info", res)
+
+	remote := ""
+	var info *types.ClusterRemoteProxyInfo
+
+	for name, data := range res {
+		remote = name
+		info = data.(*types.ClusterRemoteProxyInfo)
+		break
+	}
+
+	if remote == "" {
+		return fmt.Errorf("cluster doesn't follow any other: %s", err)
+	}
+
+	mode := "follower"
+	if checkClusterIsLeader(conf, conf.CurrentCluster) {
+		mode = "leader"
+	}
+
+	table := NewTable(2, 5)
+	table.Addheaders("field", "value")
+
+	table.entries = [][]string{
+		{"Remote Cluster", remote},
+		{"CCR Mode", mode},
+		{"Connected", fmt.Sprintf("%t", info.Connected)},
+		{"Num Proxy Sockets Connected", fmt.Sprintf("%d", info.NumProxySocketsConnected)},
+		{"Proxy Address", info.ProxyAddress},
+	}
+
+	if err := table.PrintMarkdown(); err != nil {
+		return err
+	}
+
+	return nil
+}