dependencies.php

<?php
declare(strict_types=1);

use DI\ContainerBuilder;

use Monolog\Handler\StreamHandler;
use Monolog\Logger;
use Monolog\Processor\UidProcessor;

use Psr\Container\ContainerInterface;
use Psr\Log\LoggerInterface;

use Doctrine\Common\Annotations\AnnotationReader;
use Doctrine\Common\Cache\FilesystemCache;
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\Mapping\Driver\AnnotationDriver;
use Doctrine\ORM\Tools\Setup;

use Slim\Views\Twig;
use Slim\Flash\Messages;

return function (ContainerBuilder $containerBuilder) {
    $containerBuilder->addDefinitions(
        [
        LoggerInterface::class => function (ContainerInterface $c) {
            $settings = $c->get('settings');

            $loggerSettings = $settings['logger'];
            $logger = new Logger($loggerSettings['name']);

            $processor = new UidProcessor();
            $logger->pushProcessor($processor);

            $handler = new StreamHandler($loggerSettings['path'], $loggerSettings['level']);
            $logger->pushHandler($handler);

            return $logger;
        },

        EntityManager::class => function (ContainerInterface $container): EntityManager {
            $settings = $container->get('settings');

            $config = Setup::createAnnotationMetadataConfiguration(
                $settings['doctrine']['metadata_dirs'],
                $settings['doctrine']['dev_mode']
            );

            $config->setMetadataDriverImpl(
                new AnnotationDriver(
                    new AnnotationReader,
                    $settings['doctrine']['metadata_dirs']
                )
            );

            $config->setMetadataCacheImpl(
                new FilesystemCache(
                    $settings['doctrine']['cache_dir']
                )
            );

            return EntityManager::create(
                $settings['doctrine']['connection'],
                $config
            );
        },
        Twig::class => function (ContainerInterface $container) {
            $settings = $container->get('settings');
            $twigSettings = $settings['twig'];

            $options = $twigSettings['options'];
            $options['cache'] = $options['cache_enabled'] ? $options['cache_path'] : false;

            $twig = Twig::create($twigSettings['paths'], $options);

            // Add extension here
            // ...

            return $twig;
        },
        Messages::class => function (ContainerInterface $container) {
            return new Messages();
            }
        ]
    );
};