discourse/app/assets/javascripts/admin/controllers/admin-site-settings-category.js.es6

import { inject } from "@ember/controller";
import Controller from "@ember/controller";
import computed from "ember-addons/ember-computed-decorators";

export default Controller.extend({
  categoryNameKey: null,
  adminSiteSettings: inject(),

  @computed("adminSiteSettings.visibleSiteSettings", "categoryNameKey")
  category(categories, nameKey) {
    return (categories || []).findBy("nameKey", nameKey);
  },

  @computed("category")
  filteredContent(category) {
    return category ? category.siteSettings : [];
  }
});