DatabaseDriverUninstallValidator.php

<?php

namespace Drupal\Core\Extension;

use Drupal\Core\Database\Connection;
use Drupal\Core\Database\Database;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\StringTranslation\TranslationInterface;

/**
 * Ensures installed modules providing a database driver are not uninstalled.
 */
class DatabaseDriverUninstallValidator implements ModuleUninstallValidatorInterface {
    use StringTranslationTrait;
    
    /**
     * The module extension list.
     *
     * @var \Drupal\Core\Extension\ModuleExtensionList
     */
    protected $moduleExtensionList;
    
    /**
     * The database connection.
     *
     * @var \Drupal\Core\Database\Connection
     */
    protected $connection;
    
    /**
     * Constructs a new DatabaseDriverUninstallValidator.
     *
     * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
     *   The string translation service.
     * @param \Drupal\Core\Extension\ModuleExtensionList $extension_list_module
     *   The module extension list.
     * @param \Drupal\Core\Database\Connection $connection
     *   The database connection.
     */
    public function __construct(TranslationInterface $string_translation, ModuleExtensionList $extension_list_module, Connection $connection) {
        $this->stringTranslation = $string_translation;
        $this->moduleExtensionList = $extension_list_module;
        $this->connection = $connection;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate($module) {
        $reasons = [];
        // @todo Remove the next line of code in
        // https://www.drupal.org/project/drupal/issues/3129043.
        $this->connection = Database::getConnection();
        // When the database driver is provided by a module, then that module
        // cannot be uninstalled.
        if ($module === $this->connection
            ->getProvider()) {
            $module_name = $this->moduleExtensionList
                ->get($module)->info['name'];
            $reasons[] = $this->t("The module '@module_name' is providing the database driver '@driver_name'.", [
                '@module_name' => $module_name,
                '@driver_name' => $this->connection
                    ->driver(),
            ]);
        }
        return $reasons;
    }

}