core/app/CMS/Handlers/BaseHandler.php

<?php

namespace App\CMS\Handlers;

use App\CMS\Contracts\Modules\BaseModuleHandler;
use App\CMS\Enumerations\TemplatePathsHumanReadableRootOnly;
use App\CMS\Enumerations\WidgetTypes;
use App\CMS\Repositories\Module;
use App\Models\ActionLog\ActionLog;
use App\Models\Content\Content;
use App\Models\FileManager\File;
use App\Models\Settings;
use App\Models\Templates\Template;
use App\Models\User;
use App\Models\Widgets\Widget;
use App\Models\Widgets\WidgetArea;

abstract class BaseHandler implements BaseModuleHandler
{
    /**
     * Register admin menu (or multiple ones)
     * This cannot be in ServiceProvider because Session is started at middleware. And ServiceProvider is called before
     * starting any middleware..
     *
     * @param User $user model of logged user
     */
    public static function registerAdminMenu(User $user)
    {
        $menu = \Menu::instance('mainMenu');
        if (!is_null($menu)) {
            // menus were already defined
            return;
        }

        // create instance of main menu
        \Menu::create('mainMenu', function ($menu) use ($user) {
            //            $menu->route('admin.dashboard', trans('admin/mainMenu.dashboard'), [], 10, ['icon' => 'fa fa-fw fa-dashboard']);

            /**
             * Content pages
             * Submenus can be registered later
             */
            $contentModules = app(Module::class)->getContentModules();

            if ($user->can('manage', Content::class) && !$contentModules->isEmpty()) {
                $menu->dropdown(trans('admin/mainMenu.contentPages'), function ($sub) {
                    $sub->route('content.order', trans('admin/mainMenu.contentOrder'), [], 999, ['icon' => 'fa fa-fw fa-reorder']);
                    $sub->route('content.overview', trans('admin/mainMenu.contentPageOverview'), [], 10000, ['icon' => 'fa fa-fw fa-list']);
                }, 20, ['icon' => 'fa fa-fw fa-database']);
            }

            /**
             * File manager
             */
            if ($user->can('manage', File::class)) {
                $menu->route('upload.overview', trans('admin/mainMenu.fileManager'), [], 40, ['icon' => 'fa fa-fw fa-folder']);
            }

            /**
             * Widgets and widget areas
             */
            if ($user->can('manage', Widget::class) || $user->can('manage', WidgetArea::class)) {
                $menu->dropdown(trans('admin/mainMenu.widgets'), function ($sub) use ($user) {
                    // create list of all widget types
                    $widgets = WidgetTypes::getWithTranslations();

                    if (!empty($widgets) && $user->can('create', Widget::class)) {
                        $sub->dropdown(trans('admin/mainMenu.newWidget'), function ($sub) use ($widgets) {
                            $i = 1;
                            foreach ($widgets as $type => $name) {
                                $sub->route('widgets.new', $name, ['type' => $type], $i++);
                            }
                        }, 10, ['icon' => 'fa fa-fw fa-plus']);
                    }
                    if ($user->can('manage', Widget::class)) {
                        $sub->route('widgets.overview', trans('admin/mainMenu.widgetsOverview'), [], 20, ['icon' => 'fa fa-fw fa-list']);
                    }

                    // menu for widget areas
                    if ($user->can('manage', WidgetArea::class)) {
                        $sub->dropdown(trans('admin/mainMenu.widgetAreas'), function ($sub) use ($user) {
                            if ($user->can('create', WidgetArea::class)) {
                                $sub->route('widgetareas.new', trans('admin/mainMenu.newWidgetArea'), [], 1, ['icon' => 'fa fa-fw fa-plus']);
                            }
                            $sub->route('widgetareas.overview', trans('admin/mainMenu.widgetAreaOverview'), [], 2, ['icon' => 'fa fa-fw fa-list']);
                        }, 50, ['icon' => 'fa fa-fw fa-object-group']);
                    }
                }, 50, ['icon' => 'fa fa-fw fa-puzzle-piece']);
            }

            /**
             * Divide system entries and other links in menu
             */
            $menu->addDivider(9999);

            $menu->dropdown(trans('admin/mainMenu.system'), function ($sub) use ($user) {

                /**
                 * User management
                 */
                if ($user->can('manage', User::class)) {
                    $sub->dropdown(trans('admin/mainMenu.userManagement'), function ($sub) use ($user) {
                        if ($user->can('create', User::class)) {
                            $sub->route('users.new', trans('admin/mainMenu.newUser'), [], 10, ['icon' => 'fa fa-fw fa-user-plus']);
                        }
                        $sub->route('users.overview', trans('admin/mainMenu.usersOverview'), [], 30, ['icon' => 'fa fa-fw fa-users']);
                    }, 20, ['icon' => 'fa fa-fw fa-users']);
                }

                /**
                 * Templates
                 */
                if ($user->can('manage', Template::class)) {
                    $templatePaths = TemplatePathsHumanReadableRootOnly::getWithTranslations();
                    if (!empty($templatePaths)) {
                        $sub->dropdown(trans('admin/mainMenu.templates'), function ($sub) use ($templatePaths) {
                            $i = 1;
                            foreach ($templatePaths as $id => $name) {
                                $sub->route('templates.overview', $name, ['id' => $id], $i++);
                            }
                        }, 60, ['icon' => 'fa fa-fw fa-file-code-o']);
                    }
                }

                if ($user->can('manage', ActionLog::class)) {
                    $sub->route('log.overview', trans('admin/mainMenu.actionLog'), [], 70, ['icon' => 'fa fa-fw fa-history']);
                }

                if ($user->can('manage', Settings::class)) {
                    $sub->route('settings.overview', trans('admin/mainMenu.settings'), [], 80, ['icon' => 'fa fa-fw fa-gear']);
                    $sub->route('permissions.index', trans('admin/mainMenu.permissions'), [], 90, ['icon' => 'fa fa-fw fa-key']);
                }
            }, 10000, ['icon' => 'fa fa-fw fa-gears']);
        });

        // create menu with user profile
        \Menu::create('profileMenu', function ($menu) use ($user) {
            $menu->route('users.detail', trans('admin/userManagement.profile'), ['user' => $user], 10, ['icon' => 'fa fa-fw fa-user icon']);
            $menu->addDivider(999);
            $menu->route('logout', trans('admin/common.logout'), [], 1000, ['icon' => 'fa fa-fw fa-power-off icon']);
        });
    }
}