Folders: Modify folder service Get() to optionally return fullpath (#81972)

* Folders: Modify Get() to optionally return fullpath

* Set FullPath to folder title if feature flag is off

* Apply suggestion from code review

pkg/services/folder/folderimpl/folder.go

@@ -227,8 +227,10 @@ func (s *Service) Get(ctx context.Context, q *folder.GetFolderQuery) (*folder.Fo
 	}
 
 	if !s.features.IsEnabled(ctx, featuremgmt.FlagNestedFolders) {
+		dashFolder.Fullpath = dashFolder.Title
 		return dashFolder, nil
 	}
+
 	metrics.MFolderIDsServiceCount.WithLabelValues(metrics.Folder).Inc()
 	// nolint:staticcheck
 	if q.ID != nil {
@@ -247,6 +249,10 @@ func (s *Service) Get(ctx context.Context, q *folder.GetFolderQuery) (*folder.Fo
 	f.ID = dashFolder.ID
 	f.Version = dashFolder.Version
 
+	if !s.features.IsEnabled(ctx, featuremgmt.FlagNestedFolders) {
+		f.Fullpath = f.Title // set full path to the folder title (unescaped)
+	}
+
 	return f, err
 }
 

pkg/services/folder/folderimpl/folder_test.go

@@ -1611,6 +1611,106 @@ func TestIntegrationNestedFolderSharedWithMe(t *testing.T) {
 	})
 }
 
+func TestFolderServiceGetFolder(t *testing.T) {
+	db := sqlstore.InitTestDB(t)
+
+	signedInAdminUser := user.SignedInUser{UserID: 1, OrgID: orgID, Permissions: map[int64]map[string][]string{
+		orgID: {
+			dashboards.ActionFoldersCreate: {},
+			dashboards.ActionFoldersWrite:  {dashboards.ScopeFoldersAll},
+			dashboards.ActionFoldersRead:   {dashboards.ScopeFoldersAll},
+		},
+	}}
+
+	guardian.MockDashboardGuardian(&guardian.FakeDashboardGuardian{
+		CanSaveValue: true,
+		CanViewValue: true,
+	})
+
+	getSvc := func(features featuremgmt.FeatureToggles) Service {
+		quotaService := quotatest.New(false, nil)
+		folderStore := ProvideDashboardFolderStore(db)
+
+		cfg := setting.NewCfg()
+
+		featuresFlagOff := featuremgmt.WithFeatures()
+		dashStore, err := database.ProvideDashboardStore(db, db.Cfg, featuresFlagOff, tagimpl.ProvideService(db), quotaService)
+		require.NoError(t, err)
+		nestedFolderStore := ProvideStore(db, db.Cfg)
+
+		b := bus.ProvideBus(tracing.InitializeTracerForTest())
+		ac := acimpl.ProvideAccessControl(cfg)
+
+		return Service{
+			cfg:                  cfg,
+			log:                  log.New("test-folder-service"),
+			dashboardStore:       dashStore,
+			dashboardFolderStore: folderStore,
+			store:                nestedFolderStore,
+			features:             features,
+			bus:                  b,
+			db:                   db,
+			accessControl:        ac,
+			registry:             make(map[string]folder.RegistryService),
+			metrics:              newFoldersMetrics(nil),
+		}
+	}
+
+	folderSvcOn := getSvc(featuremgmt.WithFeatures(featuremgmt.FlagNestedFolders))
+	folderSvcOff := getSvc(featuremgmt.WithFeatures())
+
+	createCmd := folder.CreateFolderCommand{
+		OrgID:        orgID,
+		ParentUID:    "",
+		SignedInUser: &signedInAdminUser,
+	}
+
+	depth := 3
+	folders := CreateSubtreeInStore(t, folderSvcOn.store, &folderSvcOn, depth, "get/folder-", createCmd)
+	f := folders[1]
+
+	testCases := []struct {
+		name             string
+		svc              *Service
+		WithFullpath     bool
+		expectedFullpath string
+	}{
+		{
+			name:             "when flag is off",
+			svc:              &folderSvcOff,
+			expectedFullpath: f.Title,
+		},
+		{
+			name:             "when flag is on and WithFullpath is false",
+			svc:              &folderSvcOn,
+			WithFullpath:     false,
+			expectedFullpath: "",
+		},
+		{
+			name:             "when flag is on and WithFullpath is true",
+			svc:              &folderSvcOn,
+			WithFullpath:     true,
+			expectedFullpath: "get\\/folder-folder-0/get\\/folder-folder-1",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			q := folder.GetFolderQuery{
+				OrgID:        orgID,
+				UID:          &f.UID,
+				WithFullpath: tc.WithFullpath,
+				SignedInUser: &signedInAdminUser,
+			}
+			fldr, err := tc.svc.Get(context.Background(), &q)
+			require.NoError(t, err)
+			require.Equal(t, f.UID, fldr.UID)
+
+			require.Equal(t, tc.expectedFullpath, fldr.Fullpath)
+		})
+	}
+}
+
 func TestFolderServiceGetFolders(t *testing.T) {
 	db := sqlstore.InitTestDB(t)
 	quotaService := quotatest.New(false, nil)
@@ -1687,7 +1787,7 @@ func TestFolderServiceGetFolders(t *testing.T) {
 	})
 }
 
-func CreateSubtreeInStore(t *testing.T, store *sqlStore, service *Service, depth int, prefix string, cmd folder.CreateFolderCommand) []*folder.Folder {
+func CreateSubtreeInStore(t *testing.T, store store, service *Service, depth int, prefix string, cmd folder.CreateFolderCommand) []*folder.Folder {
 	t.Helper()
 
 	folders := make([]*folder.Folder, 0, depth)

pkg/services/folder/folderimpl/sqlstore.go

@@ -171,27 +171,55 @@ func (ss *sqlStore) Update(ctx context.Context, cmd folder.UpdateFolderCommand)
 	return foldr.WithURL(), err
 }
 
+// If WithFullpath is true it computes also the full path of a folder.
+// The full path is a string that contains the titles of all parent folders separated by a slash.
+// For example, if the folder structure is:
+//
+//	A
+//	└── B
+//	    └── C
+//
+// The full path of C is "A/B/C".
+// The full path of B is "A/B".
+// The full path of A is "A".
+// If a folder contains a slash in its title, it is escaped with a backslash.
+// For example, if the folder structure is:
+//
+//	A
+//	└── B/C
+//
+// The full path of C is "A/B\/C".
 func (ss *sqlStore) Get(ctx context.Context, q folder.GetFolderQuery) (*folder.Folder, error) {
 	foldr := &folder.Folder{}
 	err := ss.db.WithDbSession(ctx, func(sess *db.Session) error {
 		exists := false
 		var err error
+		s := strings.Builder{}
+		s.WriteString("SELECT *")
+		if q.WithFullpath {
+			s.WriteString(fmt.Sprintf(`, %s AS fullpath`, getFullpathSQL(ss.db.GetDialect())))
+		}
+		s.WriteString(" FROM folder f0")
+		if q.WithFullpath {
+			s.WriteString(getFullpathJoinsSQL())
+		}
 		switch {
 		case q.UID != nil:
-			exists, err = sess.SQL("SELECT * FROM folder WHERE uid = ? AND org_id = ?", q.UID, q.OrgID).Get(foldr)
+			s.WriteString(" WHERE f0.uid = ? AND f0.org_id = ?")
+			exists, err = sess.SQL(s.String(), q.UID, q.OrgID).Get(foldr)
 		// nolint:staticcheck
 		case q.ID != nil:
+			s.WriteString(" WHERE f0.id = ?")
 			metrics.MFolderIDsServiceCount.WithLabelValues(metrics.Folder).Inc()
-			exists, err = sess.SQL("SELECT * FROM folder WHERE id = ?", q.ID).Get(foldr)
+			exists, err = sess.SQL(s.String(), q.ID).Get(foldr)
 		case q.Title != nil:
-			s := strings.Builder{}
-			s.WriteString("SELECT * FROM folder WHERE title = ? AND org_id = ?")
+			s.WriteString(" WHERE f0.title = ? AND f0.org_id = ?")
 			args := []any{*q.Title, q.OrgID}
 			if q.ParentUID != nil {
-				s.WriteString(" AND parent_uid = ?")
+				s.WriteString(" AND f0.parent_uid = ?")
 				args = append(args, *q.ParentUID)
 			} else {
-				s.WriteString(" AND parent_uid IS NULL")
+				s.WriteString(" AND f0.parent_uid IS NULL")
 			}
 			exists, err = sess.SQL(s.String(), args...).Get(foldr)
 		default:
@@ -207,6 +235,7 @@ func (ss *sqlStore) Get(ctx context.Context, q folder.GetFolderQuery) (*folder.F
 		return nil
 	})
 
+	foldr.Fullpath = strings.TrimLeft(foldr.Fullpath, "/")
 	return foldr.WithURL(), err
 }
 
@@ -274,15 +303,16 @@ func (ss *sqlStore) GetChildren(ctx context.Context, q folder.GetChildrenQuery)
 			args = append(args, q.UID, q.OrgID)
 		}
 
-		if q.FolderUIDs != nil {
-			sql.WriteString(" AND uid IN (?")
-			for range q.FolderUIDs[1:] {
-				sql.WriteString(", ?")
-			}
-			sql.WriteString(")")
-			for _, uid := range q.FolderUIDs {
+		if len(q.FolderUIDs) > 0 {
+			sql.WriteString(" AND uid IN (")
+			for i, uid := range q.FolderUIDs {
+				if i > 0 {
+					sql.WriteString(", ")
+				}
+				sql.WriteString("?")
 				args = append(args, uid)
 			}
+			sql.WriteString(")")
 		}
 		sql.WriteString(" ORDER BY title ASC")
 

pkg/services/folder/folderimpl/sqlstore_test.go

@@ -3,6 +3,7 @@ package folderimpl
 import (
 	"context"
 	"fmt"
+	"path"
 	"slices"
 	"sort"
 	"testing"
@@ -391,11 +392,7 @@ func TestIntegrationGet(t *testing.T) {
 		UID:         util.GenerateShortUID(),
 		ParentUID:   f.UID,
 	})
-
-	t.Cleanup(func() {
-		err := folderStore.Delete(context.Background(), []string{f.UID}, orgID)
-		require.NoError(t, err)
-	})
+	require.NoError(t, err)
 
 	t.Run("should gently fail in case of bad request", func(t *testing.T) {
 		_, err = folderStore.Get(context.Background(), folder.GetFolderQuery{})
@@ -466,6 +463,24 @@ func TestIntegrationGet(t *testing.T) {
 		assert.NotEmpty(t, ff.Updated)
 		assert.NotEmpty(t, ff.URL)
 	})
+
+	t.Run("get folder with fullpath should set fullpath as expected", func(t *testing.T) {
+		ff, err := folderStore.Get(context.Background(), folder.GetFolderQuery{
+			UID:          &subfolderWithSameName.UID,
+			OrgID:        orgID,
+			WithFullpath: true,
+		})
+		require.NoError(t, err)
+		assert.Equal(t, subfolderWithSameName.UID, ff.UID)
+		assert.Equal(t, subfolderWithSameName.OrgID, ff.OrgID)
+		assert.Equal(t, subfolderWithSameName.Title, ff.Title)
+		assert.Equal(t, subfolderWithSameName.Description, ff.Description)
+		assert.Equal(t, path.Join(f.Title, subfolderWithSameName.Title), ff.Fullpath)
+		assert.Equal(t, f.UID, ff.ParentUID)
+		assert.NotEmpty(t, ff.Created)
+		assert.NotEmpty(t, ff.Updated)
+		assert.NotEmpty(t, ff.URL)
+	})
 }
 
 func TestIntegrationGetParents(t *testing.T) {

pkg/services/folder/model.go

@@ -147,10 +147,11 @@ type DeleteFolderCommand struct {
 type GetFolderQuery struct {
 	UID *string
 	// Deprecated: use FolderUID instead
-	ID        *int64
-	Title     *string
-	ParentUID *string
-	OrgID     int64
+	ID           *int64
+	Title        *string
+	ParentUID    *string
+	OrgID        int64
+	WithFullpath bool
 
 	SignedInUser identity.Requester `json:"-"`
 }

pkg/services/folder/service.go

@@ -18,6 +18,7 @@ type Service interface {
 	// specificity (UID, ID, Title).
 	// When fetching a folder by Title, callers can optionally define a ParentUID.
 	// If ParentUID is not set then the folder will be fetched from the root level.
+	// If WithFullpath is true it computes also the full path of a folder.
 	Get(ctx context.Context, q *GetFolderQuery) (*Folder, error)
 
 	// Update is used to update a folder's UID, Title and Description. To change