Add options to the user.Count method

  Fixes #16269, exclude the admin account by default
  Add excludeDefaultAdmin method -- exclude default admin by option
  Update authModeCanBeModified method -- the user count should be 0 without admin

Signed-off-by: stonezdj <stonezdj@gmail.com>

src/controller/config/controller.go

@@ -195,5 +195,5 @@ func (c *controller) authModeCanBeModified(ctx context.Context) (bool, error) {
 	if err != nil {
 		return false, err
 	}
-	return cnt == 1, nil // admin user only
+	return cnt == 0, nil
 }

src/pkg/user/manager.go

@@ -41,7 +41,7 @@ type Manager interface {
 	// List users according to the query
 	List(ctx context.Context, query *q.Query, options ...models.Option) (commonmodels.Users, error)
 	// Count counts the number of users according to the query
-	Count(ctx context.Context, query *q.Query) (int64, error)
+	Count(ctx context.Context, query *q.Query, options ...models.Option) (int64, error)
 	// Create creates the user, the password of input should be plaintext
 	Create(ctx context.Context, user *commonmodels.User) (int, error)
 	// Delete deletes the user by updating user's delete flag and update the name and Email
@@ -116,7 +116,11 @@ func (m *manager) MatchLocalPassword(ctx context.Context, usernameOrEmail, passw
 	return nil, nil
 }
 
-func (m *manager) Count(ctx context.Context, query *q.Query) (int64, error) {
+func (m *manager) Count(ctx context.Context, query *q.Query, options ...models.Option) (int64, error) {
+	opts := models.NewOptions(options...)
+	if !opts.IncludeDefaultAdmin {
+		query = excludeDefaultAdmin(query)
+	}
 	return m.dao.Count(ctx, query)
 }
 
@@ -191,11 +195,22 @@ func (m *manager) List(ctx context.Context, query *q.Query, options ...models.Op
 	}
 	opts := models.NewOptions(options...)
 	if !opts.IncludeDefaultAdmin {
-		query.Keywords["user_id__gt"] = 1
+		query = excludeDefaultAdmin(query)
 	}
 	return m.dao.List(ctx, query)
 }
 
+func excludeDefaultAdmin(query *q.Query) (qu *q.Query) {
+	if query == nil {
+		query = q.New(q.KeyWords{})
+	}
+	if query.Keywords == nil {
+		query.Keywords = q.KeyWords{}
+	}
+	query.Keywords["user_id__gt"] = 1
+	return query
+}
+
 func injectPasswd(u *commonmodels.User, password string) {
 	salt := utils.GenerateRandomString()
 	u.Password = utils.Encrypt(password, salt, utils.SHA256)