Start work on export

For now:
 - ebook
 - mobi
 - pdf
 - csv

src/Wallabag/CoreBundle/Controller/ExportController.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Wallabag\CoreBundle\Controller;
+
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+use Wallabag\CoreBundle\Entity\Entry;
+use Wallabag\CoreBundle\Helper\EntriesExport;
+
+class ExportController extends Controller
+{
+    /**
+     * Gets all entries for current user.
+     *
+     * @Route("/export/{category}.{format}", name="ebook", requirements={
+     *     "_format": "epub|mobi|pdf|json|xml|txt|csv"
+     * })
+     */
+    public function getEntriesAction($format, $category)
+    {
+        $repository = $this->getDoctrine()->getRepository('WallabagCoreBundle:Entry');
+        switch ($category) {
+            case 'all':
+                $method = 'All';
+                break;
+
+            case 'unread':
+                $method = 'Unread';
+                break;
+
+            case 'starred':
+                $method = 'Starred';
+                break;
+
+            case 'archive':
+                $method = 'Archive';
+                break;
+
+            default:
+                break;
+        }
+
+        $methodBuilder = 'getBuilderFor'.$method.'ByUser';
+        $qb = $repository->$methodBuilder($this->getUser()->getId());
+        $entries = $qb->getQuery()->getResult();
+
+        $export = new EntriesExport($entries);
+        $export->setMethod($method);
+        $export->exportAs($format);
+    }
+
+    /**
+     * Gets one entry content.
+     *
+     * @param Entry $entry
+     *
+     * @Route("/export/id/{id}.{format}", requirements={"id" = "\d+"}, name="ebook_entry")
+     */
+    public function getEntryAction(Entry $entry, $format)
+    {
+        $export = new EntriesExport(array($entry));
+        $export->setMethod('entry');
+        $export->exportAs($format);
+    }
+}