enhancement(activitylog): enhance activitylog graph endpoint

- make use of libregraph artifacts
- add a basic activity kql ast parser

services/activitylog/pkg/service/response.go

@@ -7,6 +7,8 @@ import (
 	provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
 	"github.com/cs3org/reva/v2/pkg/storagespace"
 	"github.com/cs3org/reva/v2/pkg/utils"
+	libregraph "github.com/owncloud/libre-graph-api-go"
+
 	"github.com/owncloud/ocis/v2/ocis-pkg/l10n"
 )
 
@@ -29,14 +31,7 @@ var (
 
 // GetActivitiesResponse is the response on GET activities requests
 type GetActivitiesResponse struct {
-	Activities []Activity `json:"value"`
-}
-
-// Activity represents an activity as it is returned to the client
-type Activity struct {
-	ID       string   `json:"id"`
-	Times    Times    `json:"times"`
-	Template Template `json:"template"`
+	Activities []libregraph.Activity `json:"value"`
 }
 
 // Resource represents an item such as a file or folder
@@ -51,23 +46,12 @@ type Actor struct {
 	DisplayName string `json:"displayName"`
 }
 
-// Times represents the timestamps of the Activity
-type Times struct {
-	RecordedTime time.Time `json:"recordedTime"`
-}
-
-// Template contains activity details
-type Template struct {
-	Message   string                 `json:"message"`
-	Variables map[string]interface{} `json:"variables"`
-}
-
 // NewActivity creates a new activity
-func NewActivity(message string, res Resource, user Actor, ts Times, eventID string) Activity {
-	return Activity{
-		ID:    eventID,
+func NewActivity(message string, res Resource, user Actor, ts libregraph.ActivityTimes, eventID string) libregraph.Activity {
+	return libregraph.Activity{
+		Id:    eventID,
 		Times: ts,
-		Template: Template{
+		Template: libregraph.ActivityTemplate{
 			Message: message,
 			Variables: map[string]interface{}{
 				"resource": res,
@@ -78,26 +62,26 @@ func NewActivity(message string, res Resource, user Actor, ts Times, eventID str
 }
 
 // ResponseData returns the relevant response data for the activity
-func (s *ActivitylogService) ResponseData(ref *provider.Reference, uid *user.UserId, username string, ts time.Time) (Resource, Actor, Times, error) {
+func (s *ActivitylogService) ResponseData(ref *provider.Reference, uid *user.UserId, username string, ts time.Time) (Resource, Actor, libregraph.ActivityTimes, error) {
 	gwc, err := s.gws.Next()
 	if err != nil {
-		return Resource{}, Actor{}, Times{}, err
+		return Resource{}, Actor{}, libregraph.ActivityTimes{}, err
 	}
 
 	ctx, err := utils.GetServiceUserContext(s.cfg.ServiceAccount.ServiceAccountID, gwc, s.cfg.ServiceAccount.ServiceAccountSecret)
 	if err != nil {
-		return Resource{}, Actor{}, Times{}, err
+		return Resource{}, Actor{}, libregraph.ActivityTimes{}, err
 	}
 
 	info, err := utils.GetResource(ctx, ref, gwc)
 	if err != nil {
-		return Resource{}, Actor{}, Times{}, err
+		return Resource{}, Actor{}, libregraph.ActivityTimes{}, err
 	}
 
 	if username == "" {
 		u, err := utils.GetUser(uid, gwc)
 		if err != nil {
-			return Resource{}, Actor{}, Times{}, err
+			return Resource{}, Actor{}, libregraph.ActivityTimes{}, err
 		}
 		username = u.GetUsername()
 	}
@@ -108,7 +92,7 @@ func (s *ActivitylogService) ResponseData(ref *provider.Reference, uid *user.Use
 		}, Actor{
 			ID:          uid.GetOpaqueId(),
 			DisplayName: username,
-		}, Times{
+		}, libregraph.ActivityTimes{
 			RecordedTime: ts,
 		}, nil