func (r *registry) rendererForTopology(topologyID string, values url.Values, rpt report.Report) (render.Renderer, render.Decorator, error) {
topology, ok := r.get(topologyID)
if !ok {
return nil, nil, fmt.Errorf("topology not found: %s", topologyID)
}
topology = updateFilters(rpt, []APITopologyDesc{topology})[0]
var filters []render.FilterFunc
for _, group := range topology.Options {
value := values.Get(group.ID)
for _, opt := range group.Options {
if opt.filter == nil {
continue
}
if (value == "" && group.Default == opt.Value) || (opt.Value != "" && opt.Value == value) {
filters = append(filters, opt.filter)
}
}
}
var decorator render.Decorator
if len(filters) > 0 {
decorator = func(renderer render.Renderer) render.Renderer {
return render.MakeFilter(render.ComposeFilterFuncs(filters...), renderer)
}
}
return topology.renderer, decorator, nil
}
func filterNonKubeSystem(renderer render.Renderer) render.Renderer {
return render.MakeFilter(render.Complement(render.IsNamespace("kube-system")), renderer)
}