Rj\FrontendBundle\EventListener\InjectLiveReloadListener

Complexity

Total Complexity

8

Size/Duplication

Total Lines	64
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	onKernelResponse()	0	17	3
A	getSubscribedEvents()	0	6	1
A	shouldInject()	0	12	3

<?php

namespace Rj\FrontendBundle\EventListener;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpKernel\KernelEvents;

class InjectLiveReloadListener implements EventSubscriberInterface
{
    /**
     * @var string
     */
    private $url;

    /**
     * @param string $url
     */
    public function __construct($url)
    {
        $this->url = $url;
    }

    /**
     * {@inheritdoc}
     */
    public function onKernelResponse(FilterResponseEvent $event)
    {
        if (!$this->shouldInject($event)) {
            return;
        }

        $response = $event->getResponse();
        $content = $response->getContent();

        $pos = strripos($content, '</body>');
        if (false === $pos) {
            return;
        }

        $script = '<script src="'.$this->url.'"></script>';
        $response->setContent(substr($content, 0, $pos).$script.substr($content, $pos));
    }

    /**
     * {@inheritdoc}
     */
    public static function getSubscribedEvents()
    {
        return [
            KernelEvents::RESPONSE => ['onKernelResponse', -128],
        ];
    }

    /**
     * @param $event
     *
     * @return bool
     */
    private function shouldInject(FilterResponseEvent $event)
    {
        if ($event->getRequestType() !== HttpKernelInterface::MASTER_REQUEST) {
            return false;
        }

        if ($event->getRequest()->isXmlHttpRequest()) {
            return false;
        }

        return $event->getResponse()->headers->has('X-Debug-Token');
    }
}