Build a Menu with Recursive Functions

MenuController.php

<?php

namespace HighStatus\Http\Controllers\Admin;

use HighStatus\Services\MenuServiceInterface;
use Illuminate\Support\Facades\Route;

class MenuController extends Controller
{
    private $menuService;

    public function __construct(MenuServiceInterface $menuService)
    {
        $this->menuService = $menuService;
    }

    public function getMenus(string $className = null)
    {
        return $this->renderMenu($this->childrenParsing(), $className);
    }

    private function renderMenu(array $menus, string $className = null, int $int = 0)
    {
        $htmlView = null;
        foreach ($menus as $key => $menu) {
            $childCount = count($menu['children']);
            $dropDownIcon = ($childCount > 0 ? '<span class="fa arrow"></span>' : '');
            $htmlView .= '<li class="' . (Route::getFacadeRoot()->current()->uri() === $menu['route'] ? 'active' : '') .
                '" ><a href="' . url($menu['route']) . '"><i class="' . $menu['class_icon'] . '"></i>
                <span class="nav-label">' . $menu['name'] . '</span>' . $dropDownIcon . '</a>';
            if ($childCount > 0 && is_array($menu['children'])) {
                $htmlView .= '<ul class="' . $className . '">';
                $htmlView .= $this->renderMenu($menu['children'], $className, --$int + 1);
                $htmlView .= '</ul>';
            }
            $htmlView .= '</li>';
        }
        return $htmlView;
    }

    private function childrenParsing(int $compositeId = 0)
    {
        $treeMenu = [];
        $menus = $this->menuService->getChild($compositeId);
        foreach ($menus as $key => $menu) {
            if (!empty($menu->id)) {
                $treeMenu[] = [
                    'id' => $menu->id,
                    'composite_id' => $menu->id,
                    'name' => $menu->name,
                    'route' => $menu->route,
                    'class_icon' => $menu->class_icon,
                    'children' => $this->childrenParsing($menu->id),
                ];
            }
        }
        return $treeMenu;
    }
}

MenuServiceInterface.php

<?php

namespace HighStatus\Services;

interface MenuServiceInterface
{
    public function add(array $data);

    public function remove();

    public function getChild(int $id);
}

MenuService.php

<?php

namespace HighStatus\Services;

use HighStatus\Models\Menu\Menu;
use Illuminate\Support\Facades\DB;

class MenuService implements MenuServiceInterface
{
    public function add(array $data)
    {
        return Menu::create($data);
    }

    public function remove()
    {
    }

    public function getChild(int $id)
    {
        return DB::select('SELECT * FROM menu
                WHERE composite_id = ?
                ORDER BY CASE
                WHEN name = "Dashboard" THEN 0 ELSE 1 END, name', [$id]);
    }
}

MenuTrait.php

<?php

namespace HighStatus\Traits;

use HighStatus\Http\Controllers\Admin\MenuController;
use HighStatus\Services\MenuService;

trait Menu
{
    public static function displayMenu(string $navClassName = null)
    {
        $menu = new MenuController(new MenuService());
        echo $menu->getMenus($navClassName);
    }
}

View [layout.blade.php]

<?php

HomeController::displayMenu('nav nav-second-level collapse');