added export module (#538)

src/Export/Renderer/CsvRenderer.php

@@ -0,0 +1,71 @@
+<?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\Renderer;
+
+use App\Export\RendererInterface;
+use PhpOffice\PhpSpreadsheet\IOFactory;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+
+class CsvRenderer extends AbstractSpreadsheetRenderer implements RendererInterface
+{
+    /**
+     * @return string
+     */
+    public function getFileExtension(): string
+    {
+        return '.csv';
+    }
+
+    /**
+     * @return string
+     */
+    protected function getContentType(): string
+    {
+        return 'text/csv';
+    }
+
+    /**
+     * @param Spreadsheet $spreadsheet
+     * @return bool|string
+     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
+     */
+    protected function saveSpreadsheet(Spreadsheet $spreadsheet): string
+    {
+        $filename = tempnam(sys_get_temp_dir(), 'kimai-export-csv');
+        $writer = IOFactory::createWriter($spreadsheet, 'Csv');
+        $writer->save($filename);
+
+        return $filename;
+    }
+
+    /**
+     * @return string
+     */
+    public function getId(): string
+    {
+        return 'csv';
+    }
+
+    /**
+     * @return string
+     */
+    public function getIcon(): string
+    {
+        return 'csv';
+    }
+
+    /**
+     * @return string
+     */
+    public function getTitle(): string
+    {
+        return 'csv';
+    }
+}