Kernel.php

<?php

namespace App;

use App\DependencyInjection\Configuration;
use App\DependencyInjection\FeedbackLoader;
use App\DependencyInjection\PagesLoader;
use App\DependencyInjection\YamlFileLoader;
use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Definition\Processor;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\Config\Loader\DelegatingLoader;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Loader\LoaderResolver;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel as BaseKernel;
use Symfony\Component\Routing\RouteCollectionBuilder;
use Symfony\Component\Yaml\Exception\ParseException;
use Symfony\Component\Yaml\Parser;
use Symfony\Component\Yaml\Yaml;

class Kernel extends BaseKernel
{
    use MicroKernelTrait;

    const CONFIG_EXTS = '.{php,xml,yaml,yml}';

    public function getCacheDir()
    {
        return $this->getProjectDir().'/var/cache/'.$this->environment;
    }

    public function getLogDir()
    {
        return $this->getProjectDir().'/var/log';
    }

    public function registerBundles()
    {
        $contents = require $this->getProjectDir().'/config/bundles.php';
        foreach ($contents as $class => $envs) {
            if (isset($envs['all']) || isset($envs[$this->environment])) {
                yield new $class();
            }
        }
    }

    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader)
    {
        $container->setParameter('container.autowiring.strict_mode', true);
        $container->setParameter('container.dumper.inline_class_loader', true);
        $confDir = $this->getProjectDir().'/config';
        $loader->load($confDir.'/packages/*'.self::CONFIG_EXTS, 'glob');
        if (is_dir($confDir.'/packages/'.$this->environment)) {
            $loader->load($confDir.'/packages/'.$this->environment.'/**/*'.self::CONFIG_EXTS, 'glob');
        }
        $loader->load($confDir.'/services'.self::CONFIG_EXTS, 'glob');
        $loader->load($confDir.'/services_'.$this->environment.self::CONFIG_EXTS, 'glob');

        $loader->load($confDir.'/services/**/*'.self::CONFIG_EXTS, 'glob');

        $this->processConfiguration($container);
    }

    protected function configureRoutes(RouteCollectionBuilder $routes)
    {
        $confDir = $this->getProjectDir().'/config';
        if (is_dir($confDir.'/routes/')) {
            $routes->import($confDir.'/routes/*'.self::CONFIG_EXTS, '/', 'glob');
        }
        if (is_dir($confDir.'/routes/'.$this->environment)) {
            $routes->import($confDir.'/routes/'.$this->environment.'/**/*'.self::CONFIG_EXTS, '/', 'glob');
        }
        $routes->import($confDir.'/routes'.self::CONFIG_EXTS, '/', 'glob');
    }

    protected function processConfiguration(ContainerBuilder $container)
    {
        $config = $this->parseConfig();

        $this->processPages($container, $config['pages']);
        $this->processFeedback($container, $config['feedback']);
    }

    protected function processPages(ContainerBuilder $container, array $config)
    {
        $loader = new PagesLoader();
        $loader->load($container, $config);
    }

    protected function processFeedback(ContainerBuilder $container, array $config)
    {
        $loader = new FeedbackLoader();
        $loader->load($container, $config);
    }

    protected function parseConfig()
    {
        $processor = new Processor();
        $configuration = new Configuration();

        return $processor->processConfiguration($configuration, $this->getAppConfig());
    }

    protected function getAppConfig()
    {
        $file = $this->getProjectDir().'/config/config.yaml';

        if (!stream_is_local($file)) {
            throw new \InvalidArgumentException(sprintf('This is not a local file "%s".', $file));
        }

        if (!file_exists($file)) {
            throw new \InvalidArgumentException(sprintf('The file "%s" does not exist.', $file));
        }

        $parser = new Parser();

        try {
            return $parser->parse(file_get_contents($file), Yaml::PARSE_CONSTANT | Yaml::PARSE_CUSTOM_TAGS);
        } catch (ParseException $e) {
            throw new \InvalidArgumentException(sprintf('The file "%s" does not contain valid YAML.', $file), 0, $e);
        }
    }
}