Method Expand

internal/expand/handler.go:121–158

(ctx context.Context, req *rts.ExpandRequest)

}

func (h *Handler) Expand(ctx context.Context, req *rts.ExpandRequest) (*rts.ExpandResponse, error) {
	var subSet *ketoapi.SubjectSet

	switch sub := req.Subject.Ref.(type) {
	case *rts.Subject_Id:
		return &rts.ExpandResponse{
			Tree: &rts.SubjectTree{
				NodeType: rts.NodeType_NODE_TYPE_LEAF,
				Subject:  rts.NewSubjectID(sub.Id),
			},
		}, nil
	case *rts.Subject_Set:
		subSet = &ketoapi.SubjectSet{
			Namespace: sub.Set.Namespace,
			Object:    sub.Set.Object,
			Relation:  sub.Set.Relation,
		}
	}

	internal, err := h.d.ReadOnlyMapper().FromSubjectSet(ctx, subSet)
	if err != nil {
		return nil, err
	}
	res, err := h.d.ExpandEngine().BuildTree(ctx, internal, int(req.MaxDepth))
	if err != nil {
		return nil, err
	}
	if res == nil {
		return &rts.ExpandResponse{}, nil
	}

	tree, err := h.d.ReadOnlyMapper().ToTree(ctx, res)
	if err != nil {
		return nil, err
	}

	return &rts.ExpandResponse{Tree: tree.ToProto()}, nil
}