mail-account-admin/src/Dependencies.php

<?php
declare(strict_types=1);

namespace MailAccountAdmin;

use DI\Container;
use MailAccountAdmin\Login\LoginController;
use PDO;
use Psr\Container\ContainerInterface;
use Slim\Views\Twig;

class Dependencies
{
    public const SETTINGS = 'settings';
    public const TWIG = 'view';
    private const TWIG_TEMPLATE_DIR = __DIR__ . '/../templates';
    public const DATABASE = 'database';

    public static function createContainer(Settings $settings): Container
    {
        $container = new Container();

        // App settings
        $container->set(self::SETTINGS, $settings);

        // Twig template engine
        $container->set(self::TWIG, function (ContainerInterface $c) {
            /** @var Settings $settings */
            $settings = $c->get(self::SETTINGS);

            return Twig::create(self::TWIG_TEMPLATE_DIR, $settings->getTwigSettings());
        });

        // Database connection
        $container->set(self::DATABASE, function (ContainerInterface $c) {
            /** @var Settings $settings */
            $settings = $c->get(self::SETTINGS);
            $dbSettings = $settings->getDatabaseSettings();

            return new PDO(
                "mysql:dbname={$dbSettings['dbname']};host={$dbSettings['host']};port={$dbSettings['port']}",
                $dbSettings['username'],
                $dbSettings['password'],
                [
                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                ],
            );
        });

        // Login, registration, authentication
        $container->set(LoginController::class, function (ContainerInterface $c) {
            return new LoginController(
                $c->get(self::TWIG)
            );
        });

        return $container;
    }
}