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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/

namespace phpbb\event;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
use Symfony\Component\HttpKernel\KernelEvents;
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
use Symfony\Component\HttpFoundation\Response;

class kernel_exception_subscriber implements EventSubscriberInterface
{
	/**
	* Template object
	*
	* @var \phpbb\template\template
	*/
	protected $template;

	/**
	* Language object
	*
	* @var \phpbb\language\language
	*/
	protected $language;

	/**
	* Construct method
	*
	* @param \phpbb\template\template	$template	Template object
	* @param \phpbb\language\language	$language	Language object
	*/
	public function __construct(\phpbb\template\template $template, \phpbb\language\language $language)
	{
		$this->template = $template;
		$this->language = $language;
	}

	/**
	* This listener is run when the KernelEvents::EXCEPTION event is triggered
	*
	* @param GetResponseForExceptionEvent $event
	* @return null
	*/
	public function on_kernel_exception(GetResponseForExceptionEvent $event)
	{
		$exception = $event->getException();

		$message = $exception->getMessage();

		if ($exception instanceof \phpbb\exception\exception_interface)
		{
			$message = $this->language->lang_array($message, $exception->get_parameters());
		}

		if (!$event->getRequest()->isXmlHttpRequest())
		{
			page_header($this->language->lang('INFORMATION'));

			$this->template->assign_vars(array(
				'MESSAGE_TITLE' => $this->language->lang('INFORMATION'),
				'MESSAGE_TEXT'  => $message,
			));

			$this->template->set_filenames(array(
				'body' => 'message_body.html',
			));

			page_footer(true, false, false);

			$response = new Response($this->template->assign_display('body'), 500);
		}
		else
		{
			$data = array();

			if (!empty($message))
			{
				$data['message'] = $message;
			}

			if (defined('DEBUG'))
			{
				$data['trace'] = $exception->getTrace();
			}

			$response = new JsonResponse($data, 500);
		}

		if ($exception instanceof HttpExceptionInterface)
		{
			$response->setStatusCode($exception->getStatusCode());
			$response->headers->add($exception->getHeaders());
		}

		$event->setResponse($response);
	}

	static public function getSubscribedEvents()
	{
		return array(
			KernelEvents::EXCEPTION		=> 'on_kernel_exception',
		);
	}
}