API: return resource ID when deleting datasource with UID and library element (#41342)

* API: return resource ID when deleting datasource and library element

* keep status codes consistent

* fix element ID

* add test

* improve response struct

* update endpoints documentation

* LibraryElementIDResponse -> DeleteLibraryElementResponse

pkg/services/libraryelements/api.go

@@ -35,12 +35,15 @@ func (l *LibraryElementService) createHandler(c *models.ReqContext, cmd CreateLi
 
 // deleteHandler handles DELETE /api/library-elements/:uid.
 func (l *LibraryElementService) deleteHandler(c *models.ReqContext) response.Response {
-	err := l.deleteLibraryElement(c.Req.Context(), c.SignedInUser, web.Params(c.Req)[":uid"])
+	id, err := l.deleteLibraryElement(c.Req.Context(), c.SignedInUser, web.Params(c.Req)[":uid"])
 	if err != nil {
 		return toLibraryElementError(err, "Failed to delete library element")
 	}
 
-	return response.Success("Library element deleted")
+	return response.JSON(200, DeleteLibraryElementResponse{
+		Message: "Library element deleted",
+		ID:      id,
+	})
 }
 
 // getHandler handles GET  /api/library-elements/:uid.

pkg/services/libraryelements/database.go

@@ -169,8 +169,9 @@ func (l *LibraryElementService) createLibraryElement(c context.Context, signedIn
 }
 
 // deleteLibraryElement deletes a library element.
-func (l *LibraryElementService) deleteLibraryElement(c context.Context, signedInUser *models.SignedInUser, uid string) error {
-	return l.SQLStore.WithTransactionalDbSession(c, func(session *sqlstore.DBSession) error {
+func (l *LibraryElementService) deleteLibraryElement(c context.Context, signedInUser *models.SignedInUser, uid string) (int64, error) {
+	var elementID int64
+	err := l.SQLStore.WithTransactionalDbSession(c, func(session *sqlstore.DBSession) error {
 		element, err := getLibraryElement(l.SQLStore.Dialect, session, uid, signedInUser.OrgId)
 		if err != nil {
 			return err
@@ -198,8 +199,10 @@ func (l *LibraryElementService) deleteLibraryElement(c context.Context, signedIn
 			return ErrLibraryElementNotFound
 		}
 
+		elementID = element.ID
 		return nil
 	})
+	return elementID, err
 }
 
 // getLibraryElements gets a Library Element where param == value

pkg/services/libraryelements/libraryelements_delete_test.go

@@ -1,6 +1,7 @@
 package libraryelements
 
 import (
+	"encoding/json"
 	"testing"
 
 	"github.com/grafana/grafana/pkg/components/simplejson"
@@ -17,11 +18,17 @@ func TestDeleteLibraryElement(t *testing.T) {
 			require.Equal(t, 404, resp.Status())
 		})
 
-	scenarioWithPanel(t, "When an admin tries to delete a library panel that exists, it should succeed",
+	scenarioWithPanel(t, "When an admin tries to delete a library panel that exists, it should succeed and return correct ID",
 		func(t *testing.T, sc scenarioContext) {
 			sc.ctx.Req = web.SetURLParams(sc.ctx.Req, map[string]string{":uid": sc.initialResult.Result.UID})
 			resp := sc.service.deleteHandler(sc.reqContext)
 			require.Equal(t, 200, resp.Status())
+
+			var result DeleteLibraryElementResponse
+			err := json.Unmarshal(resp.Body(), &result)
+
+			require.NoError(t, err)
+			require.Equal(t, sc.initialResult.Result.ID, result.ID)
 		})
 
 	scenarioWithPanel(t, "When an admin tries to delete a library panel in another org, it should fail",

pkg/services/libraryelements/models.go

@@ -207,3 +207,9 @@ type LibraryElementArrayResponse struct {
 type LibraryElementConnectionsResponse struct {
 	Result []LibraryElementConnectionDTO `json:"result"`
 }
+
+// DeleteLibraryElementResponse is the response struct for deleting a library element.
+type DeleteLibraryElementResponse struct {
+	ID      int64  `json:"id"`
+	Message string `json:"message"`
+}