event/system.go

package event

type System struct {
	busList []*eventBus
}

func NewSystem() *System {
	return &System{[]*eventBus{}}
}

// NewBus params are 0 - emitPrefix
func (s *System) NewBus(params ...string) Bus {
	emitPrefix := ""
	if len(params) != 0 {
		emitPrefix = params[0]
	}

	evtBus := &eventBus{s, emitPrefix, map[string]*[]HandlerFunc{}}
	s.busList = append(s.busList, evtBus)

	return evtBus
}
func (s *System) RemoveBus(bus Bus) {
	where := -1
	for i, b := range s.busList {
		if b == bus { // Pointer comparison somehow?
			where = i
			break
		}
	}

	s.busList = append(s.busList[:where], s.busList[where+1:]...)

}

func (s *System) handleEvent(evt Event) {
	// Pass this event trough all buses
	for _, bus := range s.busList {
		bus.handleEvent(evt)
	}
}