Chore: Move folder store interface, implementation and test under pkg/services/folder (#62586)

* Chore: Move folder store into folder service package

* Split folder and dashboard store implementations

pkg/services/folder/folderimpl/dashboard_folder_store.go

@@ -0,0 +1,86 @@
+package folderimpl
+
+import (
+	"context"
+
+	"github.com/grafana/grafana/pkg/infra/db"
+	"github.com/grafana/grafana/pkg/services/dashboards"
+	"github.com/grafana/grafana/pkg/services/folder"
+)
+
+// DashboardStore implements the FolderStore interface
+// It fetches folders from the dashboard DB table
+type DashboardFolderStoreImpl struct {
+	store db.DB
+}
+
+func ProvideDashboardFolderStore(sqlStore db.DB) *DashboardFolderStoreImpl {
+	return &DashboardFolderStoreImpl{store: sqlStore}
+}
+
+func (d *DashboardFolderStoreImpl) GetFolderByTitle(ctx context.Context, orgID int64, title string) (*folder.Folder, error) {
+	if title == "" {
+		return nil, dashboards.ErrFolderTitleEmpty
+	}
+
+	// there is a unique constraint on org_id, folder_id, title
+	// there are no nested folders so the parent folder id is always 0
+	dashboard := dashboards.Dashboard{OrgID: orgID, FolderID: 0, Title: title}
+	err := d.store.WithTransactionalDbSession(ctx, func(sess *db.Session) error {
+		has, err := sess.Table(&dashboards.Dashboard{}).Where("is_folder = " + d.store.GetDialect().BooleanStr(true)).Where("folder_id=0").Get(&dashboard)
+		if err != nil {
+			return err
+		}
+		if !has {
+			return dashboards.ErrFolderNotFound
+		}
+		dashboard.SetID(dashboard.ID)
+		dashboard.SetUID(dashboard.UID)
+		return nil
+	})
+	return dashboards.FromDashboard(&dashboard), err
+}
+
+func (d *DashboardFolderStoreImpl) GetFolderByID(ctx context.Context, orgID int64, id int64) (*folder.Folder, error) {
+	dashboard := dashboards.Dashboard{OrgID: orgID, FolderID: 0, ID: id}
+	err := d.store.WithTransactionalDbSession(ctx, func(sess *db.Session) error {
+		has, err := sess.Table(&dashboards.Dashboard{}).Where("is_folder = " + d.store.GetDialect().BooleanStr(true)).Where("folder_id=0").Get(&dashboard)
+		if err != nil {
+			return err
+		}
+		if !has {
+			return dashboards.ErrFolderNotFound
+		}
+		dashboard.SetID(dashboard.ID)
+		dashboard.SetUID(dashboard.UID)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return dashboards.FromDashboard(&dashboard), nil
+}
+
+func (d *DashboardFolderStoreImpl) GetFolderByUID(ctx context.Context, orgID int64, uid string) (*folder.Folder, error) {
+	if uid == "" {
+		return nil, dashboards.ErrDashboardIdentifierNotSet
+	}
+
+	dashboard := dashboards.Dashboard{OrgID: orgID, FolderID: 0, UID: uid}
+	err := d.store.WithTransactionalDbSession(ctx, func(sess *db.Session) error {
+		has, err := sess.Table(&dashboards.Dashboard{}).Where("is_folder = " + d.store.GetDialect().BooleanStr(true)).Where("folder_id=0").Get(&dashboard)
+		if err != nil {
+			return err
+		}
+		if !has {
+			return dashboards.ErrFolderNotFound
+		}
+		dashboard.SetID(dashboard.ID)
+		dashboard.SetUID(dashboard.UID)
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	return dashboards.FromDashboard(&dashboard), nil
+}