<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace App\EventSubscriber;
use Doctrine\DBAL\Exception\DriverException;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Console\ConsoleEvents;
use Symfony\Component\Console\Event\ConsoleErrorEvent;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\ExceptionEvent;
use Symfony\Component\HttpKernel\KernelEvents;
/**
* This application uses by default an SQLite database to store its information.
* That's why the 'sqlite3' extension must be enabled in PHP. This event
* subscriber listens to console events and in case of an exception caused by
* a disabled 'sqlite3' extension, it displays a meaningful error message.
*
* @author Javier Eguiluz <javier.eguiluz@gmail.com>
*/
class CheckRequirementsSubscriber implements EventSubscriberInterface
{
private $entityManager;
public function __construct(EntityManagerInterface $entityManager)
{
$this->entityManager = $entityManager;
}
// Event Subscribers must define this method to declare the events they
// listen to. You can listen to several events, execute more than one method
// for each event and set the priority of each event too.
// See https://symfony.com/doc/current/event_dispatcher.html#creating-an-event-subscriber
public static function getSubscribedEvents(): array
{
return [
// Errors are one of the events defined by the Console. See the
// rest here: https://symfony.com/doc/current/components/console/events.html
ConsoleEvents::ERROR => 'handleConsoleError',
// See: https://symfony.com/doc/current/components/http_kernel.html#component-http-kernel-event-table
KernelEvents::EXCEPTION => 'handleKernelException',
];
}
/**
* This method checks if there has been an error in a command related to
* the database and then, it checks if the 'sqlite3' PHP extension is enabled
* or not to display a better error message.
*/
public function handleConsoleError(ConsoleErrorEvent $event): void
{
$commandNames = ['doctrine:fixtures:load', 'doctrine:database:create', 'doctrine:schema:create', 'doctrine:database:drop'];
if ($event->getCommand() && \in_array($event->getCommand()->getName(), $commandNames, true)) {
if ($this->isSQLitePlatform() && !\extension_loaded('sqlite3')) {
$io = new SymfonyStyle($event->getInput(), $event->getOutput());
$io->error('This command requires to have the "sqlite3" PHP extension enabled because, by default, the Symfony Demo application uses SQLite to store its information.');
}
}
}
/**
* This method checks if the triggered exception is related to the database
* and then, it checks if the required 'sqlite3' PHP extension is enabled.
*/
public function handleKernelException(ExceptionEvent $event): void
{
$exception = $event->getThrowable();
// Since any exception thrown during a Twig template rendering is wrapped
// in a Twig_Error_Runtime, we must get the original exception.
$previousException = $exception->getPrevious();
// Driver exception may happen in controller or in twig template rendering
$isDriverException = ($exception instanceof DriverException || $previousException instanceof DriverException);
// Check if SQLite is enabled
if ($isDriverException && $this->isSQLitePlatform() && !\extension_loaded('sqlite3')) {
$event->setThrowable(new \Exception('PHP extension "sqlite3" must be enabled because, by default, the Symfony Demo application uses SQLite to store its information.'));
}
}
/**
* Checks if the application is using SQLite as its database.
*/
private function isSQLitePlatform(): bool
{
$databasePlatform = $this->entityManager->getConnection()->getDatabasePlatform();
return $databasePlatform ? 'sqlite' === $databasePlatform->getName() : false;
}
}