Contao 4 manager plugin

The Contao managed edition is a self-configuring application, which registers bundles automatically based on their plugin class. The Contao manager bundle is required to create this class.

The plugin class

It is recommended to create the plugin in src/ContaoManager/Plugin.php.

<?php

namespace Vendor\SomeBundle\ContaoManager;

class Plugin
{
}

composer.json

The plugin class then needs to be registered in the composer.json extra section. You also have to add a dev requirement and a conflict as shown below.

{
    "require-dev": {
        "contao/manager-plugin": "^2.0"
    },
    "conflict": {
        "contao/manager-plugin": "<2.0 || >=3.0"
    },
    "extra": {
        "contao-manager-plugin": "Vendor\\SomeBundle\\ContaoManager\\Plugin"
    }
}

If your bundle uses other bundles, which are not yet registered in the kernel, you can add them by implementing the BundlePluginInterface interface. The following example registers the KnpMenuBundle class:

<?php

namespace Vendor\SomeBundle\ContaoManager;

use Contao\ManagerPlugin\Bundle\Config\BundleConfig;
use Contao\ManagerPlugin\Bundle\BundlePluginInterface;
use Contao\ManagerPlugin\Bundle\Parser\ParserInterface;
use Knp\Bundle\MenuBundle\KnpMenuBundle;

class Plugin implements BundlePluginInterface
{
    public function getBundles(ParserInterface $parser)
    {
        return [
            BundleConfig::create(KnpMenuBundle::class),
        ];
    }
}

This is the equivalent of registering the KnpMenuBundle class in the registerBundles() method of the regular Symfony app kernel, except it is done automatically as soon as your bundle is installed.

Configuring the container

If your bundle adds configuration options to the Symfony kernel or if you want to adjust the existing configuration, you can do so by implementing the ConfigPluginInterface.

<?php

namespace Vendor\SomeBundle\ContaoManager;

use Contao\ManagerPlugin\Config\ConfigPluginInterface;
use Symfony\Component\Config\Loader\LoaderInterface;

class Plugin implements ConfigPluginInterface
{
    public function registerContainerConfiguration(LoaderInterface $loader, array $config)
    {
        $loader->load('@VendorSomeBundle/Resources/config/config.yml');
    }
}

You can also add a configuration in a specific environment only:

<?php

namespace Vendor\SomeBundle\ContaoManager;

use Contao\ManagerPlugin\Config\ConfigPluginInterface;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;

class Plugin implements ConfigPluginInterface
{
    public function registerContainerConfiguration(LoaderInterface $loader, array $config)
    {
        $loader->load(
            function (ContainerBuilder $container) use ($loader) {
                if ('dev' === $container->getParameter('kernel.environment')) {
                    $loader->load('@VendorSomeBundle/Resources/config/config_dev.yml');
                }
            }
        );
    }
}

This is the equivalent of adjusting the app/config/config.yml file of a regular Symfony application.

Adding custom routes

If your bundle adds custom routes to the Symfony router, you can implement the RoutingPluginInterface interface.

<?php

namespace Vendor\SomeBundle\ContaoManager;

use Contao\ManagerPlugin\Routing\RoutingPluginInterface;
use Symfony\Component\Config\Loader\LoaderResolverInterface;
use Symfony\Component\HttpKernel\KernelInterface;

class Plugin implements RoutingPluginInterface
{
    public function getRouteCollection(LoaderResolverInterface $resolver, KernelInterface $kernel)
    {
        $file = '@VendorSomeBundle/Resources/config/routing.yml';

        return $resolver->resolve($file)->load($file);
    }
}

This is the equivalent of adjusting the app/config/routing.yml file of a regular Symfony application.

Loading dependencies

If your bundle depends on one or more other bundles to be loaded first, so it can override certain parts of them, you can ensure that these bundles are loaded first by implementing the DependentPluginInterface.

<?php

namespace Vendor\SomeBundle\ContaoManager;

use Contao\ManagerPlugin\Dependency\DependentPluginInterface;

class Plugin implements DependentPluginInterface
{
    public function getPackageDependencies()
    {
        return ['contao/news-bundle'];
    }
}