Add show user command (#207)

Signed-off-by: Congqi Xia <congqi.xia@zilliz.com>

models/user.go

@@ -0,0 +1,25 @@
+package models
+
+import (
+	"path"
+
+	internalpbv2 "github.com/milvus-io/birdwatcher/proto/v2.2/internalpb"
+)
+
+type UserInfo struct {
+	Username          string
+	EncryptedPassword string
+	Tenant            string
+	IsSuper           bool
+	Sha256Password    string
+}
+
+func NewUserInfo(info *internalpbv2.CredentialInfo, key string) *UserInfo {
+	return &UserInfo{
+		Username:          path.Base(key),
+		EncryptedPassword: info.GetEncryptedPassword(),
+		Tenant:            info.GetTenant(),
+		IsSuper:           info.GetIsSuper(),
+		Sha256Password:    info.GetSha256Password(),
+	}
+}

states/etcd/common/list.go

@@ -2,13 +2,41 @@ package common
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 
 	"github.com/golang/protobuf/proto"
 	clientv3 "go.etcd.io/etcd/client/v3"
 	"google.golang.org/protobuf/runtime/protoiface"
 )
 
+func ListJSONObjects[T any, P interface{ *T }](ctx context.Context, cli clientv3.KV, prefix string, filters ...func(t P) bool) ([]P, []string, error) {
+	resp, err := cli.Get(ctx, prefix, clientv3.WithPrefix())
+	if err != nil {
+		return nil, nil, err
+	}
+	result := make([]P, 0, len(resp.Kvs))
+	keys := make([]string, 0, len(resp.Kvs))
+LOOP:
+	for _, kv := range resp.Kvs {
+		var elem T
+		err = json.Unmarshal(kv.Value, &elem)
+		if err != nil {
+			fmt.Println(err.Error())
+			continue
+		}
+
+		for _, filter := range filters {
+			if !filter(&elem) {
+				continue LOOP
+			}
+		}
+		result = append(result, &elem)
+		keys = append(keys, string(kv.Key))
+	}
+	return result, keys, nil
+}
+
 // ListProtoObjects returns proto objects with specified prefix.
 func ListProtoObjects[T any, P interface {
 	*T

states/etcd/common/user.go

@@ -0,0 +1,29 @@
+package common
+
+import (
+	"context"
+	"path"
+
+	"github.com/milvus-io/birdwatcher/models"
+	internalpbv2 "github.com/milvus-io/birdwatcher/proto/v2.2/internalpb"
+	"github.com/samber/lo"
+	clientv3 "go.etcd.io/etcd/client/v3"
+)
+
+const (
+	userPrefix = `root-coord/credential/users`
+)
+
+func ListUsers(ctx context.Context, cli clientv3.KV, basePath string) ([]*models.UserInfo, error) {
+	prefix := path.Join(basePath, userPrefix)
+
+	infos, keys, err := ListJSONObjects[internalpbv2.CredentialInfo](ctx, cli, prefix)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return lo.Map(infos, func(info *internalpbv2.CredentialInfo, idx int) *models.UserInfo {
+		return models.NewUserInfo(info, keys[idx])
+	}), nil
+}

states/etcd/show/user.go

@@ -0,0 +1,47 @@
+package show
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/cockroachdb/errors"
+	"github.com/milvus-io/birdwatcher/framework"
+	"github.com/milvus-io/birdwatcher/models"
+	"github.com/milvus-io/birdwatcher/states/etcd/common"
+)
+
+type UserParam struct {
+	framework.ParamBase `use:"show user" desc:"display user info from rootcoord meta"`
+	// DatabaseName        string `name:"name" default:"" desc:"database name to filter with"`
+}
+
+// DatabaseCommand returns show database comand.
+func (c *ComponentShow) UserCommand(ctx context.Context, p *UserParam) (*Users, error) {
+	users, err := common.ListUsers(ctx, c.client, c.basePath)
+	if err != nil {
+		fmt.Println("failed to list database info", err.Error())
+		return nil, errors.Wrap(err, "failed to list database info")
+	}
+
+	return framework.NewListResult[Users](users), nil
+}
+
+type Users struct {
+	framework.ListResultSet[*models.UserInfo]
+}
+
+func (rs *Users) PrintAs(format framework.Format) string {
+	switch format {
+	case framework.FormatDefault, framework.FormatPlain:
+		sb := &strings.Builder{}
+		for _, user := range rs.Data {
+			//rs.printDatabaseInfo(sb, database)
+			sb.WriteString(fmt.Sprintf("Username: %s Tenant:%s\n", user.Username, user.Tenant))
+		}
+		fmt.Fprintf(sb, "--- Total Users(s): %d\n", len(rs.Data))
+		return sb.String()
+	default:
+	}
+	return ""
+}