gateway: add parentRef field to project group update api

and make all the request fields optional

internal/services/gateway/action/projectgroup.go

@@ -105,8 +105,10 @@ func (h *ActionHandler) CreateProjectGroup(ctx context.Context, req *CreateProje
 }
 
 type UpdateProjectGroupRequest struct {
-	Name       string
-	Visibility cstypes.Visibility
+	Name      *string
+	ParentRef *string
+
+	Visibility *cstypes.Visibility
 }
 
 func (h *ActionHandler) UpdateProjectGroup(ctx context.Context, projectGroupRef string, req *UpdateProjectGroupRequest) (*csapitypes.ProjectGroup, error) {
@@ -123,8 +125,15 @@ func (h *ActionHandler) UpdateProjectGroup(ctx context.Context, projectGroupRef
 		return nil, util.NewErrForbidden(errors.Errorf("user not authorized"))
 	}
 
-	pg.Name = req.Name
-	pg.Visibility = req.Visibility
+	if req.Name != nil {
+		pg.Name = *req.Name
+	}
+	if req.ParentRef != nil {
+		pg.Parent.ID = *req.ParentRef
+	}
+	if req.Visibility != nil {
+		pg.Visibility = *req.Visibility
+	}
 
 	h.log.Infof("updating project group")
 	rp, resp, err := h.configstoreClient.UpdateProjectGroup(ctx, pg.ID, pg.ProjectGroup)

internal/services/gateway/api/projectgroup.go

@@ -100,9 +100,16 @@ func (h *UpdateProjectGroupHandler) ServeHTTP(w http.ResponseWriter, r *http.Req
 		return
 	}
 
+	var visibility *cstypes.Visibility
+	if req.Visibility != nil {
+		v := cstypes.Visibility(*req.Visibility)
+		visibility = &v
+	}
+
 	areq := &action.UpdateProjectGroupRequest{
 		Name:       req.Name,
-		Visibility: cstypes.Visibility(req.Visibility),
+		ParentRef:  req.ParentRef,
+		Visibility: visibility,
 	}
 	projectGroup, err := h.ah.UpdateProjectGroup(ctx, projectGroupRef, areq)
 	if httpError(w, err) {

services/gateway/api/types/projectgroup.go

@@ -21,8 +21,9 @@ type CreateProjectGroupRequest struct {
 }
 
 type UpdateProjectGroupRequest struct {
-	Name       string     `json:"name,omitempty"`
-	Visibility Visibility `json:"visibility,omitempty"`
+	Name       *string     `json:"name,omitempty"`
+	ParentRef  *string     `json:"parent_ref,omitempty"`
+	Visibility *Visibility `json:"visibility,omitempty"`
 }
 
 type ProjectGroupResponse struct {