Public Dashboards: Adds template variable validation for pubdash on the backend (#52566)

Validates template variables for pubdash on the backend when saving a public dashboard

pkg/services/publicdashboards/api/api.go

@@ -126,6 +126,7 @@ func (api *Api) SavePublicDashboardConfig(c *models.ReqContext) response.Respons
 		PublicDashboard: pubdash,
 	}
 
+	// Save the public dashboard
 	pubdash, err := api.PublicDashboardService.SavePublicDashboardConfig(c.Req.Context(), &dto)
 	if err != nil {
 		return handleDashboardErr(http.StatusInternalServerError, "Failed to save public dashboard configuration", err)

pkg/services/publicdashboards/database/database.go

@@ -34,6 +34,22 @@ func ProvideStore(sqlStore *sqlstore.SQLStore) *PublicDashboardStoreImpl {
 	}
 }
 
+func (d *PublicDashboardStoreImpl) GetDashboard(ctx context.Context, dashboardUid string) (*models.Dashboard, error) {
+	dashboard := &models.Dashboard{Uid: dashboardUid}
+	err := d.sqlStore.WithTransactionalDbSession(ctx, func(sess *sqlstore.DBSession) error {
+		has, err := sess.Get(dashboard)
+		if err != nil {
+			return err
+		}
+		if !has {
+			return ErrPublicDashboardNotFound
+		}
+		return nil
+	})
+
+	return dashboard, err
+}
+
 // Retrieves public dashboard configuration
 func (d *PublicDashboardStoreImpl) GetPublicDashboard(ctx context.Context, accessToken string) (*PublicDashboard, *models.Dashboard, error) {
 	if accessToken == "" {
@@ -58,17 +74,7 @@ func (d *PublicDashboardStoreImpl) GetPublicDashboard(ctx context.Context, acces
 	}
 
 	// find dashboard
-	dashRes := &models.Dashboard{OrgId: pdRes.OrgId, Uid: pdRes.DashboardUid}
-	err = d.sqlStore.WithTransactionalDbSession(ctx, func(sess *sqlstore.DBSession) error {
-		has, err := sess.Get(dashRes)
-		if err != nil {
-			return err
-		}
-		if !has {
-			return ErrPublicDashboardNotFound
-		}
-		return nil
-	})
+	dashRes, err := d.GetDashboard(ctx, pdRes.DashboardUid)
 
 	if err != nil {
 		return nil, nil, err

pkg/services/publicdashboards/database/database_test.go

@@ -24,6 +24,29 @@ var DefaultTimeSettings, _ = simplejson.NewJson([]byte(`{}`))
 // Default time to pass in with seconds rounded
 var DefaultTime = time.Now().UTC().Round(time.Second)
 
+func TestIntegrationGetDashboard(t *testing.T) {
+	var sqlStore *sqlstore.SQLStore
+	var dashboardStore *dashboardsDB.DashboardStore
+	var publicdashboardStore *PublicDashboardStoreImpl
+	var savedDashboard *models.Dashboard
+
+	setup := func() {
+		sqlStore = sqlstore.InitTestDB(t)
+		dashboardStore = dashboardsDB.ProvideDashboardStore(sqlStore)
+		publicdashboardStore = ProvideStore(sqlStore)
+		savedDashboard = insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
+	}
+
+	t.Run("GetDashboard can get original dashboard by uid", func(t *testing.T) {
+		setup()
+
+		dashboard, err := publicdashboardStore.GetDashboard(context.Background(), savedDashboard.Uid)
+
+		require.NoError(t, err)
+		require.Equal(t, savedDashboard.Uid, dashboard.Uid)
+	})
+}
+
 // GetPublicDashboard
 func TestIntegrationGetPublicDashboard(t *testing.T) {
 	var sqlStore *sqlstore.SQLStore

pkg/services/publicdashboards/models/models.go

@@ -45,6 +45,10 @@ var (
 		Reason:     "No Uid for public dashboard specified",
 		StatusCode: 400,
 	}
+	ErrPublicDashboardHasTemplateVariables = PublicDashboardErr{
+		Reason:     "Public dashboard has template variables",
+		StatusCode: 422,
+	}
 )
 
 type PublicDashboard struct {

pkg/services/publicdashboards/public_dashboard_service_mock.go

@@ -64,6 +64,29 @@ func (_m *FakePublicDashboardService) BuildPublicDashboardMetricRequest(ctx cont
 	return r0, r1
 }
 
+// GetDashboard provides a mock function with given fields: ctx, dashboardUid
+func (_m *FakePublicDashboardService) GetDashboard(ctx context.Context, dashboardUid string) (*models.Dashboard, error) {
+	ret := _m.Called(ctx, dashboardUid)
+
+	var r0 *models.Dashboard
+	if rf, ok := ret.Get(0).(func(context.Context, string) *models.Dashboard); ok {
+		r0 = rf(ctx, dashboardUid)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*models.Dashboard)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, string) error); ok {
+		r1 = rf(ctx, dashboardUid)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // GetPublicDashboard provides a mock function with given fields: ctx, accessToken
 func (_m *FakePublicDashboardService) GetPublicDashboard(ctx context.Context, accessToken string) (*models.Dashboard, error) {
 	ret := _m.Called(ctx, accessToken)

pkg/services/publicdashboards/public_dashboard_store_mock.go

@@ -5,10 +5,10 @@ package publicdashboards
 import (
 	context "context"
 
-	models "github.com/grafana/grafana/pkg/services/publicdashboards/models"
+	models "github.com/grafana/grafana/pkg/models"
 	mock "github.com/stretchr/testify/mock"
 
-	pkgmodels "github.com/grafana/grafana/pkg/models"
+	publicdashboardsmodels "github.com/grafana/grafana/pkg/services/publicdashboards/models"
 
 	testing "testing"
 )
@@ -39,25 +39,48 @@ func (_m *FakePublicDashboardStore) GenerateNewPublicDashboardUid(ctx context.Co
 	return r0, r1
 }
 
+// GetDashboard provides a mock function with given fields: ctx, dashboardUid
+func (_m *FakePublicDashboardStore) GetDashboard(ctx context.Context, dashboardUid string) (*models.Dashboard, error) {
+	ret := _m.Called(ctx, dashboardUid)
+
+	var r0 *models.Dashboard
+	if rf, ok := ret.Get(0).(func(context.Context, string) *models.Dashboard); ok {
+		r0 = rf(ctx, dashboardUid)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*models.Dashboard)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, string) error); ok {
+		r1 = rf(ctx, dashboardUid)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // GetPublicDashboard provides a mock function with given fields: ctx, accessToken
-func (_m *FakePublicDashboardStore) GetPublicDashboard(ctx context.Context, accessToken string) (*models.PublicDashboard, *pkgmodels.Dashboard, error) {
+func (_m *FakePublicDashboardStore) GetPublicDashboard(ctx context.Context, accessToken string) (*publicdashboardsmodels.PublicDashboard, *models.Dashboard, error) {
 	ret := _m.Called(ctx, accessToken)
 
-	var r0 *models.PublicDashboard
-	if rf, ok := ret.Get(0).(func(context.Context, string) *models.PublicDashboard); ok {
+	var r0 *publicdashboardsmodels.PublicDashboard
+	if rf, ok := ret.Get(0).(func(context.Context, string) *publicdashboardsmodels.PublicDashboard); ok {
 		r0 = rf(ctx, accessToken)
 	} else {
 		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*models.PublicDashboard)
+			r0 = ret.Get(0).(*publicdashboardsmodels.PublicDashboard)
 		}
 	}
 
-	var r1 *pkgmodels.Dashboard
-	if rf, ok := ret.Get(1).(func(context.Context, string) *pkgmodels.Dashboard); ok {
+	var r1 *models.Dashboard
+	if rf, ok := ret.Get(1).(func(context.Context, string) *models.Dashboard); ok {
 		r1 = rf(ctx, accessToken)
 	} else {
 		if ret.Get(1) != nil {
-			r1 = ret.Get(1).(*pkgmodels.Dashboard)
+			r1 = ret.Get(1).(*models.Dashboard)
 		}
 	}
 
@@ -72,15 +95,15 @@ func (_m *FakePublicDashboardStore) GetPublicDashboard(ctx context.Context, acce
 }
 
 // GetPublicDashboardConfig provides a mock function with given fields: ctx, orgId, dashboardUid
-func (_m *FakePublicDashboardStore) GetPublicDashboardConfig(ctx context.Context, orgId int64, dashboardUid string) (*models.PublicDashboard, error) {
+func (_m *FakePublicDashboardStore) GetPublicDashboardConfig(ctx context.Context, orgId int64, dashboardUid string) (*publicdashboardsmodels.PublicDashboard, error) {
 	ret := _m.Called(ctx, orgId, dashboardUid)
 
-	var r0 *models.PublicDashboard
-	if rf, ok := ret.Get(0).(func(context.Context, int64, string) *models.PublicDashboard); ok {
+	var r0 *publicdashboardsmodels.PublicDashboard
+	if rf, ok := ret.Get(0).(func(context.Context, int64, string) *publicdashboardsmodels.PublicDashboard); ok {
 		r0 = rf(ctx, orgId, dashboardUid)
 	} else {
 		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*models.PublicDashboard)
+			r0 = ret.Get(0).(*publicdashboardsmodels.PublicDashboard)
 		}
 	}
 
@@ -116,20 +139,20 @@ func (_m *FakePublicDashboardStore) PublicDashboardEnabled(ctx context.Context,
 }
 
 // SavePublicDashboardConfig provides a mock function with given fields: ctx, cmd
-func (_m *FakePublicDashboardStore) SavePublicDashboardConfig(ctx context.Context, cmd models.SavePublicDashboardConfigCommand) (*models.PublicDashboard, error) {
+func (_m *FakePublicDashboardStore) SavePublicDashboardConfig(ctx context.Context, cmd publicdashboardsmodels.SavePublicDashboardConfigCommand) (*publicdashboardsmodels.PublicDashboard, error) {
 	ret := _m.Called(ctx, cmd)
 
-	var r0 *models.PublicDashboard
-	if rf, ok := ret.Get(0).(func(context.Context, models.SavePublicDashboardConfigCommand) *models.PublicDashboard); ok {
+	var r0 *publicdashboardsmodels.PublicDashboard
+	if rf, ok := ret.Get(0).(func(context.Context, publicdashboardsmodels.SavePublicDashboardConfigCommand) *publicdashboardsmodels.PublicDashboard); ok {
 		r0 = rf(ctx, cmd)
 	} else {
 		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(*models.PublicDashboard)
+			r0 = ret.Get(0).(*publicdashboardsmodels.PublicDashboard)
 		}
 	}
 
 	var r1 error
-	if rf, ok := ret.Get(1).(func(context.Context, models.SavePublicDashboardConfigCommand) error); ok {
+	if rf, ok := ret.Get(1).(func(context.Context, publicdashboardsmodels.SavePublicDashboardConfigCommand) error); ok {
 		r1 = rf(ctx, cmd)
 	} else {
 		r1 = ret.Error(1)
@@ -139,11 +162,11 @@ func (_m *FakePublicDashboardStore) SavePublicDashboardConfig(ctx context.Contex
 }
 
 // UpdatePublicDashboardConfig provides a mock function with given fields: ctx, cmd
-func (_m *FakePublicDashboardStore) UpdatePublicDashboardConfig(ctx context.Context, cmd models.SavePublicDashboardConfigCommand) error {
+func (_m *FakePublicDashboardStore) UpdatePublicDashboardConfig(ctx context.Context, cmd publicdashboardsmodels.SavePublicDashboardConfigCommand) error {
 	ret := _m.Called(ctx, cmd)
 
 	var r0 error
-	if rf, ok := ret.Get(0).(func(context.Context, models.SavePublicDashboardConfigCommand) error); ok {
+	if rf, ok := ret.Get(0).(func(context.Context, publicdashboardsmodels.SavePublicDashboardConfigCommand) error); ok {
 		r0 = rf(ctx, cmd)
 	} else {
 		r0 = ret.Error(0)

pkg/services/publicdashboards/publicdashboard.go

@@ -14,6 +14,7 @@ import (
 type Service interface {
 	BuildAnonymousUser(ctx context.Context, dashboard *models.Dashboard) (*models.SignedInUser, error)
 	GetPublicDashboard(ctx context.Context, accessToken string) (*models.Dashboard, error)
+	GetDashboard(ctx context.Context, dashboardUid string) (*models.Dashboard, error)
 	GetPublicDashboardConfig(ctx context.Context, orgId int64, dashboardUid string) (*PublicDashboard, error)
 	SavePublicDashboardConfig(ctx context.Context, dto *SavePublicDashboardConfigDTO) (*PublicDashboard, error)
 	BuildPublicDashboardMetricRequest(ctx context.Context, dashboard *models.Dashboard, publicDashboard *PublicDashboard, panelId int64) (dtos.MetricRequest, error)
@@ -23,6 +24,7 @@ type Service interface {
 //go:generate mockery --name Store --structname FakePublicDashboardStore --inpackage --filename public_dashboard_store_mock.go
 type Store interface {
 	GetPublicDashboard(ctx context.Context, accessToken string) (*PublicDashboard, *models.Dashboard, error)
+	GetDashboard(ctx context.Context, dashboardUid string) (*models.Dashboard, error)
 	GetPublicDashboardConfig(ctx context.Context, orgId int64, dashboardUid string) (*PublicDashboard, error)
 	GenerateNewPublicDashboardUid(ctx context.Context) (string, error)
 	SavePublicDashboardConfig(ctx context.Context, cmd SavePublicDashboardConfigCommand) (*PublicDashboard, error)

pkg/services/publicdashboards/service/service.go

@@ -10,10 +10,10 @@ import (
 	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/models"
-	"github.com/grafana/grafana/pkg/services/dashboards"
 	"github.com/grafana/grafana/pkg/services/datasources"
 	"github.com/grafana/grafana/pkg/services/publicdashboards"
 	. "github.com/grafana/grafana/pkg/services/publicdashboards/models"
+	"github.com/grafana/grafana/pkg/services/publicdashboards/validation"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
@@ -42,6 +42,16 @@ func ProvideService(
 	}
 }
 
+func (pd *PublicDashboardServiceImpl) GetDashboard(ctx context.Context, dashboardUid string) (*models.Dashboard, error) {
+	dashboard, err := pd.store.GetDashboard(ctx, dashboardUid)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return dashboard, err
+}
+
 // Gets public dashboard via access token
 func (pd *PublicDashboardServiceImpl) GetPublicDashboard(ctx context.Context, accessToken string) (*models.Dashboard, error) {
 	pubdash, d, err := pd.store.GetPublicDashboard(ctx, accessToken)
@@ -78,8 +88,13 @@ func (pd *PublicDashboardServiceImpl) GetPublicDashboardConfig(ctx context.Conte
 // SavePublicDashboardConfig is a helper method to persist the sharing config
 // to the database. It handles validations for sharing config and persistence
 func (pd *PublicDashboardServiceImpl) SavePublicDashboardConfig(ctx context.Context, dto *SavePublicDashboardConfigDTO) (*PublicDashboard, error) {
-	if len(dto.DashboardUid) == 0 {
-		return nil, dashboards.ErrDashboardIdentifierNotSet
+	dashboard, err := pd.GetDashboard(ctx, dto.DashboardUid)
+	if err != nil {
+		return nil, err
+	}
+	err = validation.ValidateSavePublicDashboard(dto, dashboard)
+	if err != nil {
+		return nil, err
 	}
 
 	// set default value for time settings

pkg/services/publicdashboards/service/service_test.go

@@ -120,7 +120,7 @@ func TestSavePublicDashboard(t *testing.T) {
 		sqlStore := sqlstore.InitTestDB(t)
 		dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
 		publicdashboardStore := database.ProvideStore(sqlStore)
-		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
+		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, []map[string]interface{}{})
 
 		service := &PublicDashboardServiceImpl{
 			log:   log.New("test.logger"),
@@ -164,7 +164,7 @@ func TestSavePublicDashboard(t *testing.T) {
 		sqlStore := sqlstore.InitTestDB(t)
 		dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
 		publicdashboardStore := database.ProvideStore(sqlStore)
-		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
+		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, []map[string]interface{}{})
 
 		service := &PublicDashboardServiceImpl{
 			log:   log.New("test.logger"),
@@ -190,7 +190,32 @@ func TestSavePublicDashboard(t *testing.T) {
 		assert.Equal(t, defaultPubdashTimeSettings, pubdash.TimeSettings)
 	})
 
-	t.Run("PLACEHOLDER - dashboard with template variables cannot be saved", func(t *testing.T) {})
+	t.Run("Validate pubdash whose dashboard has template variables returns error", func(t *testing.T) {
+		sqlStore := sqlstore.InitTestDB(t)
+		dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
+		publicdashboardStore := database.ProvideStore(sqlStore)
+		templateVars := make([]map[string]interface{}, 1)
+		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, templateVars)
+
+		service := &PublicDashboardServiceImpl{
+			log:   log.New("test.logger"),
+			store: publicdashboardStore,
+		}
+
+		dto := &SavePublicDashboardConfigDTO{
+			DashboardUid: dashboard.Uid,
+			OrgId:        dashboard.OrgId,
+			UserId:       7,
+			PublicDashboard: &PublicDashboard{
+				IsEnabled:    true,
+				DashboardUid: "NOTTHESAME",
+				OrgId:        9999999,
+			},
+		}
+
+		_, err := service.SavePublicDashboardConfig(context.Background(), dto)
+		require.Error(t, err)
+	})
 }
 
 func TestUpdatePublicDashboard(t *testing.T) {
@@ -198,7 +223,7 @@ func TestUpdatePublicDashboard(t *testing.T) {
 		sqlStore := sqlstore.InitTestDB(t)
 		dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
 		publicdashboardStore := database.ProvideStore(sqlStore)
-		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
+		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, []map[string]interface{}{})
 
 		service := &PublicDashboardServiceImpl{
 			log:   log.New("test.logger"),
@@ -265,7 +290,7 @@ func TestUpdatePublicDashboard(t *testing.T) {
 		sqlStore := sqlstore.InitTestDB(t)
 		dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
 		publicdashboardStore := database.ProvideStore(sqlStore)
-		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
+		dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, []map[string]interface{}{})
 
 		service := &PublicDashboardServiceImpl{
 			log:   log.New("test.logger"),
@@ -323,7 +348,7 @@ func TestUpdatePublicDashboard(t *testing.T) {
 func TestBuildAnonymousUser(t *testing.T) {
 	sqlStore := sqlstore.InitTestDB(t)
 	dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
-	dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
+	dashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, []map[string]interface{}{})
 	publicdashboardStore := database.ProvideStore(sqlStore)
 	service := &PublicDashboardServiceImpl{
 		log:   log.New("test.logger"),
@@ -346,8 +371,8 @@ func TestBuildPublicDashboardMetricRequest(t *testing.T) {
 	dashboardStore := dashboardsDB.ProvideDashboardStore(sqlStore)
 	publicdashboardStore := database.ProvideStore(sqlStore)
 
-	publicDashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true)
-	nonPublicDashboard := insertTestDashboard(t, dashboardStore, "testNonPublicDashie", 1, 0, true)
+	publicDashboard := insertTestDashboard(t, dashboardStore, "testDashie", 1, 0, true, []map[string]interface{}{})
+	nonPublicDashboard := insertTestDashboard(t, dashboardStore, "testNonPublicDashie", 1, 0, true, []map[string]interface{}{})
 
 	service := &PublicDashboardServiceImpl{
 		log:   log.New("test.logger"),
@@ -441,7 +466,7 @@ func TestBuildPublicDashboardMetricRequest(t *testing.T) {
 }
 
 func insertTestDashboard(t *testing.T, dashboardStore *dashboardsDB.DashboardStore, title string, orgId int64,
-	folderId int64, isFolder bool, tags ...interface{}) *models.Dashboard {
+	folderId int64, isFolder bool, templateVars []map[string]interface{}, tags ...interface{}) *models.Dashboard {
 	t.Helper()
 	cmd := models.SaveDashboardCommand{
 		OrgId:    orgId,
@@ -490,6 +515,9 @@ func insertTestDashboard(t *testing.T, dashboardStore *dashboardsDB.DashboardSto
 					},
 				},
 			},
+			"templating": map[string]interface{}{
+				"list": templateVars,
+			},
 		}),
 	}
 	dash, err := dashboardStore.SaveDashboard(cmd)

pkg/services/publicdashboards/validation/validation_test.go

@@ -0,0 +1,60 @@
+package validation
+
+import (
+	"testing"
+
+	"github.com/grafana/grafana/pkg/components/simplejson"
+	"github.com/grafana/grafana/pkg/models"
+	publicdashboardModels "github.com/grafana/grafana/pkg/services/publicdashboards/models"
+	"github.com/stretchr/testify/require"
+)
+
+func TestValidateSavePublicDashboard(t *testing.T) {
+	t.Run("Returns validation error when dto has no dashboard uid", func(t *testing.T) {
+		dashboard := models.NewDashboard("dashboardTitle")
+		dto := &publicdashboardModels.SavePublicDashboardConfigDTO{DashboardUid: "", OrgId: 1, UserId: 1, PublicDashboard: nil}
+
+		err := ValidateSavePublicDashboard(dto, dashboard)
+		require.ErrorContains(t, err, "Unique identifier needed to be able to get a dashboard")
+	})
+
+	t.Run("Returns no validation error when dto has dashboard uid", func(t *testing.T) {
+		dashboard := models.NewDashboard("dashboardTitle")
+		dto := &publicdashboardModels.SavePublicDashboardConfigDTO{DashboardUid: "abc123", OrgId: 1, UserId: 1, PublicDashboard: nil}
+
+		err := ValidateSavePublicDashboard(dto, dashboard)
+		require.NoError(t, err)
+	})
+
+	t.Run("Returns validation error when dashboard has template variables", func(t *testing.T) {
+		templateVars := []byte(`{
+			"templating": {
+				 "list": [
+				   {
+					  "name": "templateVariableName"
+				   }
+				]
+			}
+		}`)
+		dashboardData, _ := simplejson.NewJson(templateVars)
+		dashboard := models.NewDashboardFromJson(dashboardData)
+		dto := &publicdashboardModels.SavePublicDashboardConfigDTO{DashboardUid: "abc123", OrgId: 1, UserId: 1, PublicDashboard: nil}
+
+		err := ValidateSavePublicDashboard(dto, dashboard)
+		require.ErrorContains(t, err, "Public dashboard has template variables")
+	})
+
+	t.Run("Returns no validation error when dashboard has no template variables", func(t *testing.T) {
+		templateVars := []byte(`{
+			"templating": {
+				 "list": []
+			}
+		}`)
+		dashboardData, _ := simplejson.NewJson(templateVars)
+		dashboard := models.NewDashboardFromJson(dashboardData)
+		dto := &publicdashboardModels.SavePublicDashboardConfigDTO{DashboardUid: "abc123", OrgId: 1, UserId: 1, PublicDashboard: nil}
+
+		err := ValidateSavePublicDashboard(dto, dashboard)
+		require.NoError(t, err)
+	})
+}

pkg/services/publicdashboards/validation/validator.go

@@ -0,0 +1,27 @@
+package validation
+
+import (
+	"github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/services/dashboards"
+	publicDashboardModels "github.com/grafana/grafana/pkg/services/publicdashboards/models"
+)
+
+func ValidateSavePublicDashboard(dto *publicDashboardModels.SavePublicDashboardConfigDTO, dashboard *models.Dashboard) error {
+	var err error
+
+	if len(dto.DashboardUid) == 0 {
+		return dashboards.ErrDashboardIdentifierNotSet
+	}
+
+	if hasTemplateVariables(dashboard) {
+		return publicDashboardModels.ErrPublicDashboardHasTemplateVariables
+	}
+
+	return err
+}
+
+func hasTemplateVariables(dashboard *models.Dashboard) bool {
+	templateVariables := dashboard.Data.Get("templating").Get("list").MustArray()
+
+	return len(templateVariables) > 0
+}