fix(robot): handle empty permissions in robot view

pkg/views/robot/view/view.go

@@ -87,7 +87,8 @@ func ViewRobot(robot *models.Robot) {
 		enabledStatus = views.GreenStyle.Render("Enabled")
 	}
 
-	TotalPermissions := strconv.FormatInt(int64(len(robot.Permissions[0].Access)), 10)
+	totalPermissions, namespace := robotPermissionSummary(robot)
+	TotalPermissions := strconv.FormatInt(int64(totalPermissions), 10)
 
 	if robot.ExpiresAt == -1 {
 		expires = "Never"
@@ -127,7 +128,7 @@ func ViewRobot(robot *models.Robot) {
 		permissionsColumns = projectPermissionsColumns
 		resourceStrings = projectResourceStrings
 		systemLevel = false
-		fmt.Printf("\n%s\n\n", views.BoldStyle.Render(fmt.Sprintf("System-level robot with access across projects: %s", robot.Permissions[0].Namespace)))
+		fmt.Printf("\n%s\n\n", views.BoldStyle.Render(fmt.Sprintf("System-level robot with access across projects: %s", namespace)))
 	}
 
 	var permissionRows []table.Row
@@ -216,6 +217,15 @@ func ViewRobot(robot *models.Robot) {
 	}
 }
 
+func robotPermissionSummary(robot *models.Robot) (permissionCount int, namespace string) {
+	namespace = "--"
+	if len(robot.Permissions) == 0 || robot.Permissions[0] == nil {
+		return 0, namespace
+	}
+
+	return len(robot.Permissions[0].Access), robot.Permissions[0].Namespace
+}
+
 func createProjectPermissionRows(perm *models.RobotPermission, availablePerms map[string][]string) []table.Row {
 	var rows []table.Row
 	resActs := map[string][]string{}

pkg/views/robot/view/view_test.go

@@ -0,0 +1,49 @@
+// Copyright Project Harbor Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package view
+
+import (
+	"testing"
+
+	"github.com/goharbor/go-client/pkg/sdk/v2.0/models"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRobotPermissionSummaryWithoutPermissions(t *testing.T) {
+	robot := &models.Robot{}
+
+	permissionCount, namespace := robotPermissionSummary(robot)
+
+	assert.Equal(t, 0, permissionCount)
+	assert.Equal(t, "--", namespace)
+}
+
+func TestRobotPermissionSummaryWithPermissions(t *testing.T) {
+	robot := &models.Robot{
+		Permissions: []*models.RobotPermission{
+			{
+				Namespace: "demo",
+				Access: []*models.Access{
+					{Resource: "repository", Action: "pull"},
+					{Resource: "artifact", Action: "read"},
+				},
+			},
+		},
+	}
+
+	permissionCount, namespace := robotPermissionSummary(robot)
+
+	assert.Equal(t, 2, permissionCount)
+	assert.Equal(t, "demo", namespace)
+}