[Config] Default configuration overriding

[fsoedjede]

Environment

Symfony 4.4.2
PHP 7.3

Subject

I think there is an issue with configuration overriding.
When I set a default configuration, the overriding applies to only first level in the array.
I want to add parameters to filebrowserImageBrowseRouteParameters but currently I need to redefine all keys of filebrowserImageBrowseRouteParameters in order to make it work

Steps to reproduce

1. Create a form

use FOS\CKEditorBundle\Form\Type\CKEditorType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class NewsType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('summary',CKEditorType::class, array(
                'required' => false,
                'config_name' => 'admin',
                'config' => [
                    'filebrowserImageBrowseRouteParameters' => [
                        'context' => 'news'
                    ],
                    'filebrowserUploadRouteParameters' => [
                        'context' => 'news'
                    ],
                ]
            ));
    }
}

2. Define default config:

fos_ck_editor:
    default_config: admin
    configs:
        admin:
            filebrowserBrowseRoute: admin_media_browser
            filebrowserImageBrowseRoute: admin_media_browser
            filebrowserImageBrowseRouteParameters:
                provider: image
                action: browser
            filebrowserUploadMethod: form
            filebrowserUploadRoute: admin_media_upload
            filebrowserUploadRouteParameters:
                provider: image
                action: upload

Expected results

At the end of FOS\CKEditorBundle\Form\Type\CKEditorType::resolveConfig,

$config['filebrowserImageBrowseRouteParameters'] should contain 3 items: provider, action and context

Actual results

$config['filebrowserImageBrowseRouteParameters'] contains only one item: context

The upload does not work in that context.

How to fix

In the file https://github.com/FriendsOfSymfony/FOSCKEditorBundle/blob/2.x/src/Form/Type/CKEditorType.php#L72

Prevously:

$config = array_merge($this->configuration->getConfig($options['config_name']), $config);

Proposal:

$config = array_merge_recursive($this->configuration->getConfig($options['config_name']), $config);

There may be a BC break if that change is made

Regards

[fsoedjede]

Bad idea. it does not now well. Maybe we can add condition to merge array items?