support different formats in user timesheet exports (#1222)

src/Twig/TimesheetExtension.php

@@ -0,0 +1,47 @@
+<?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\Twig;
+
+use App\Export\ServiceExport;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class TimesheetExtension extends AbstractExtension
+{
+    /**
+     * @var ServiceExport
+     */
+    private $service;
+
+    public function __construct(ServiceExport $service)
+    {
+        $this->service = $service;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return [
+            new TwigFunction('timesheet_exporter', [$this, 'getTimesheetExporter'], []),
+        ];
+    }
+
+    public function getTimesheetExporter(): array
+    {
+        $ids = [];
+        foreach ($this->service->getTimesheetExporter() as $exporter) {
+            $ids[] = $exporter->getId();
+        }
+
+        return $ids;
+    }
+}