Extending Bolt / Adding Pages in the backend

Create a page in the Bolt's backend¶

You can add pages to Bolt's backend by creating a custom Controller in the src folder of your project.

To configure it as a backend Controller, two steps are necessary:

• The Controller class needs to implement the BackendZoneInterface that Bolt provides
• The routes.yaml file needs to add Bolt backend prefix for the controller's routes.

Creating a backend page Controller¶

<?php

namespace App;

use Symfony\Component\Routing\Annotation\Route;
use Bolt\Controller\Backend\BackendZoneInterface;
use Symfony\Component\HttpFoundation\Response;

class UserContentController extends TwigAwareController implements BackendZoneInterface
{
    /**
     * @Route("/content-user/", name="app_content_user")
     */
    public function viewEdits(): Response
    {
        // content_user.html.twig is a custom file 
        // that needs to be located in the `templates`
        // folder in the root of your project.
        return $this->render('content_user.html.twig', [
            'title' => 'User content'
        ]);
    }
}

Defining the controller route with the backend url prefix¶

Locate the config/routes.yaml file and add the following after project:

app_panel:
    resource: '../src/UserContentController.php'
    prefix: '%bolt.backend_url%'
    type: annotation

Make sure to replace UserContentController.php with the name of your Controller class.

Using a Twig template to render the page¶

You can use any Twig template of your choosing to render the page. In this example, the Controller defined content_user.html.twig as the template that will be used to generate the response. Make sure to create a file with that name in the templates folder in the root of your project.

For example, the content_user.html.twig file may contain the following:

{% extends '@bolt/_base/layout.html.twig' %}

{% block title %}
   This is the title of the page
{% endblock %}

{% block main %}
    <p>This is the content for a user. It is currently empty.</p>
{% endblock %}

Provided templates¶

Bolt provides two templates that you can extend when creating custom backend pages:

All available templates that Bolt uses under the hood are available in Bolt's repository.

Add a page to Bolt's sidebar menu¶

Bolt allows the sidebar menu to be extended to add extra items and links. To do so, create a class inside the src folder of your project that implements the ExtensionBackendMenuInterface.

The example below defines a new menu section for the User Content page shown above.

<?php

namespace App;

use Bolt\Menu\ExtensionBackendMenuInterface;
use Knp\Menu\MenuItem;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;

class UserContentMenu implements ExtensionBackendMenuInterface
{
    /** @var UrlGeneratorInterface */
    private $urlGenerator;

    public function __construct(UrlGeneratorInterface $urlGenerator)
    {
        $this->urlGenerator = $urlGenerator;
    }

    public function addItems(MenuItem $menu): void
    {
        // This adds a new heading
        $menu->addChild('User Content Extension', [
            'extras' => [
                'name' => 'User Content Extension',
                'type' => 'separator',
            ]
        ]);

        // This adds the link
        $menu->addChild('Content list', [
           'uri' => $this->urlGenerator->generate('app_content_user'),
            'extras' => [
                'icon' => 'fa-user-circle'
            ]
        ]);
    }
}