Add rss for entries

will fix #1000

src/Wallabag/CoreBundle/ParamConverter/UsernameRssTokenConverter.php

@@ -0,0 +1,92 @@
+<?php
+
+namespace Wallabag\CoreBundle\ParamConverter;
+
+use Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\ParamConverterInterface;
+use Doctrine\Common\Persistence\ManagerRegistry;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Wallabag\CoreBundle\Entity\User;
+
+/**
+ * ParamConverter used in the RSS controller to retrieve the right user according to
+ * username & token given in the url.
+ *
+ * @see http://stfalcon.com/en/blog/post/symfony2-custom-paramconverter
+ */
+class UsernameRssTokenConverter implements ParamConverterInterface
+{
+    private $registry;
+
+    /**
+     * @param ManagerRegistry $registry Manager registry
+     */
+    public function __construct(ManagerRegistry $registry = null)
+    {
+        $this->registry = $registry;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * Check, if object supported by our converter
+     */
+    public function supports(ParamConverter $configuration)
+    {
+        // If there is no manager, this means that only Doctrine DBAL is configured
+        // In this case we can do nothing and just return
+        if (null === $this->registry || !count($this->registry->getManagers())) {
+            return false;
+        }
+
+        // Check, if option class was set in configuration
+        if (null === $configuration->getClass()) {
+            return false;
+        }
+
+        // Get actual entity manager for class
+        $em = $this->registry->getManagerForClass($configuration->getClass());
+
+        // Check, if class name is what we need
+        if ('Wallabag\CoreBundle\Entity\User' !== $em->getClassMetadata($configuration->getClass())->getName()) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * Applies converting
+     *
+     * @throws \InvalidArgumentException When route attributes are missing
+     * @throws NotFoundHttpException     When object not found
+     */
+    public function apply(Request $request, ParamConverter $configuration)
+    {
+        $username = $request->attributes->get('username');
+        $rssToken  = $request->attributes->get('token');
+
+        // Check, if route attributes exists
+        if (null === $username || null === $rssToken) {
+            throw new \InvalidArgumentException('Route attribute is missing');
+        }
+
+        // Get actual entity manager for class
+        $em = $this->registry->getManagerForClass($configuration->getClass());
+
+        $userRepository = $em->getRepository($configuration->getClass());
+
+        // Try to find user by its username and config rss_token
+        $user = $userRepository->findOneByUsernameAndRsstoken($username, $rssToken);
+
+        if (null === $user || !($user instanceof User)) {
+            throw new NotFoundHttpException(sprintf('%s not found.', $configuration->getClass()));
+        }
+
+        // Map found user to the route's parameter
+        $request->attributes->set($configuration->getName(), $user);
+    }
+}