added export module (#538)

src/Export/RendererInterface.php

@@ -0,0 +1,39 @@
+<?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\Export;
+
+use App\Entity\Timesheet;
+use App\Repository\Query\TimesheetQuery;
+use Symfony\Component\HttpFoundation\Response;
+
+interface RendererInterface
+{
+    /**
+     * @param Timesheet[] $timesheets
+     * @param TimesheetQuery $query
+     * @return Response
+     */
+    public function render(array $timesheets, TimesheetQuery $query): Response;
+
+    /**
+     * @return string
+     */
+    public function getId(): string;
+
+    /**
+     * @return string
+     */
+    public function getIcon(): string;
+
+    /**
+     * @return string
+     */
+    public function getTitle(): string;
+}