Alerting: Update API to use folders' full paths (#81214)

* update GetUserVisibleNamespaces to use FolderSeriver
* update GetNamespaceByUID to use FolderService.GetFolders
* update GetAlertRulesForScheduling to use FolderService.GetFolders 

* Update API and GetAlertRulesForScheduling to use the folder's full path
* get full path of folder in RouteTestGrafanaRuleConfig

* fix escaping of titles for MySQL

pkg/services/ngalert/api/api_testing.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"context"
 	"errors"
 	"net/http"
 	"net/url"
@@ -18,7 +19,9 @@ import (
 	"github.com/grafana/grafana/pkg/api/response"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/infra/tracing"
+	"github.com/grafana/grafana/pkg/services/auth/identity"
 	contextmodel "github.com/grafana/grafana/pkg/services/contexthandler/model"
+	"github.com/grafana/grafana/pkg/services/dashboards"
 	"github.com/grafana/grafana/pkg/services/datasources"
 	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/folder"
@@ -32,6 +35,10 @@ import (
 	"github.com/grafana/grafana/pkg/util"
 )
 
+type folderService interface {
+	GetNamespaceByUID(ctx context.Context, uid string, orgID int64, user identity.Requester) (*folder.Folder, error)
+}
+
 type TestingApiSrv struct {
 	*AlertingProxy
 	DatasourceCache datasources.CacheService
@@ -43,22 +50,23 @@ type TestingApiSrv struct {
 	featureManager  featuremgmt.FeatureToggles
 	appUrl          *url.URL
 	tracer          tracing.Tracer
+	folderService   folderService
 }
 
 // RouteTestGrafanaRuleConfig returns a list of potential alerts for a given rule configuration. This is intended to be
 // as true as possible to what would be generated by the ruler except that the resulting alerts are not filtered to
 // only Resolved / Firing and ready to send.
 func (srv TestingApiSrv) RouteTestGrafanaRuleConfig(c *contextmodel.ReqContext, body apimodels.PostableExtendedRuleNodeExtended) response.Response {
+	folder, err := srv.folderService.GetNamespaceByUID(c.Req.Context(), body.NamespaceUID, c.OrgID, c.SignedInUser)
+	if err != nil {
+		return toNamespaceErrorResponse(dashboards.ErrFolderAccessDenied)
+	}
 	rule, err := validateRuleNode(
 		&body.Rule,
 		body.RuleGroup,
 		srv.cfg.BaseInterval,
 		c.SignedInUser.GetOrgID(),
-		&folder.Folder{
-			OrgID: c.SignedInUser.GetOrgID(),
-			UID:   body.NamespaceUID,
-			Title: body.NamespaceTitle,
-		},
+		folder,
 		srv.cfg,
 	)
 	if err != nil {
@@ -103,8 +111,7 @@ func (srv TestingApiSrv) RouteTestGrafanaRuleConfig(c *contextmodel.ReqContext,
 		now,
 		rule,
 		results,
-		// TODO remove when switched to full path https://github.com/grafana/grafana/issues/80324
-		state.GetRuleExtraLabels(rule, ngmodels.GetNamespaceKey("", body.NamespaceTitle), includeFolder),
+		state.GetRuleExtraLabels(rule, folder.Fullpath, includeFolder),
 	)
 
 	alerts := make([]*amv2.PostableAlert, 0, len(transitions))