app_vue2/use/layout/Menus/billingMenu.ts

import {ItemMenu, ItemsMenu, Menu} from "~/types/interfaces";
import BaseMenu from "~/use/layout/Menus/baseMenu";
import {NuxtConfig} from "@nuxt/types/config";
import {Ability} from "@casl/ability";

/**
 * @category Use/layout/Menus
 * @class BillingMenu
 * Classe pour la construction du Menu Facturation
 */
class BillingMenu extends BaseMenu implements Menu{
  private $ability:Ability;

  /**
   * @constructor
   * Initialisation des services issues du context
   */
  constructor($config:NuxtConfig, $ability:Ability) {
    super($config)
    this.$ability = $ability
  }

  /**
   * Construit le menu Facturation ou null si aucune page accessible
   * @return {ItemMenu | null}
   */
  getMenu():ItemMenu | null {
    const children:ItemsMenu = [];

    if (this.$ability.can('display', 'billing_product_page')) {
      children.push(this.constructMenu('billing_product', 'fa-cube',  '/intangibles/list/', true))
    }

    if (this.$ability.can('display', 'billing_products_by_student_page')) {
      children.push(this.constructMenu('billing_products_by_student', 'fa-cubes',  '/access_intangibles/list/', true))
    }

    if (this.$ability.can('display', 'billing_edition_page')) {
      children.push(this.constructMenu('billing_edition', 'fa-copy',  '/billing_edition', true))
    }

    if (this.$ability.can('display', 'billing_accounting_page')) {
      children.push(this.constructMenu('billing_accounting', 'fa-file-alt',  '/bill_accountings/list/', true))
    }

    if (this.$ability.can('display', 'billing_payment_list_page')) {
      children.push(this.constructMenu('billing_payment_list', 'fa-credit-card',  '/bill_payments_list/list/', true))
    }

    if (this.$ability.can('display', 'pes_page')) {
      children.push(this.constructMenu('pes_export', 'fa-align-justify',  '/pes/list/', true))
    }

    if (this.$ability.can('display', 'berger_levrault_page')) {
      children.push(this.constructMenu('berger_levrault_export', 'fa-align-justify',  '/berger_levraults/list/', true))
    }

    if (this.$ability.can('display', 'jvs_page')) {
      children.push(this.constructMenu('jvs_export', 'fa-align-justify',  '/jvs/list/', true))
    }

    if(children.length === 1){
      return children[0];
    }
    return children.length > 0 ? this.constructMenu('billing', 'fa-euro-sign',  undefined, undefined, children) : null;
  }
}

export const getBillingMenu = ($config:NuxtConfig, $ability:Ability) => new BillingMenu($config, $ability).getMenu()