A route-action helper to expose current route handling

route-action.js

import Helper from '@ember/component/helper';
import { inject as service } from '@ember-decorators/service';
import { bind } from '@ember/runloop';
import { getOwner } from '@ember/application';

function findHandler(owner, currentRouteInfo, action) {
  const route = owner.lookup(`route:${currentRouteInfo.name}`);
  const handler = route.actions ? route.actions[action] : route[action];
  if (!handler && currentRouteInfo.parent) {
    return findHandler(owner, currentRouteInfo.parent, action);
  } else {
    return {route, handler};
  }
}

export default class RouteActionHelper extends Helper {
  @service router;

  compute([action, ...args], _hash) {
    const {route, handler} = findHandler(getOwner(this), this.router.currentRoute, action);
    if (handler) {
      return bind(route, handler, ...args);
    } else {
      return function() {};
    }
  }
}