added json, xml and txt invoice renderer (#1576)

src/Invoice/Renderer/XmlRenderer.php

@@ -0,0 +1,53 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Invoice\Renderer;
+
+use App\Entity\InvoiceDocument;
+use App\Invoice\InvoiceFilename;
+use App\Invoice\InvoiceModel;
+use App\Invoice\RendererInterface;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\ResponseHeaderBag;
+use Twig\Environment;
+
+final class XmlRenderer implements RendererInterface
+{
+    /**
+     * @var Environment
+     */
+    private $twig;
+
+    public function __construct(Environment $twig)
+    {
+        $this->twig = $twig;
+    }
+
+    public function supports(InvoiceDocument $document): bool
+    {
+        return stripos($document->getFilename(), '.xml.twig') !== false;
+    }
+
+    public function render(InvoiceDocument $document, InvoiceModel $model): Response
+    {
+        $content = $this->twig->render('@invoice/' . basename($document->getFilename()), [
+            'model' => $model
+        ]);
+        $filename = (string) new InvoiceFilename($model);
+
+        $response = new Response($content);
+
+        $disposition = $response->headers->makeDisposition(ResponseHeaderBag::DISPOSITION_ATTACHMENT, $filename . '.xml');
+
+        $response->headers->set('Content-Type', 'application/xml');
+        $response->headers->set('Content-Disposition', $disposition);
+
+        return $response;
+    }
+}