translate time-tracking in login screen and browser title (#738)

src/Twig/TitleExtension.php

@@ -0,0 +1,57 @@
+<?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\Constants;
+use App\Entity\Timesheet;
+use App\Utils\Duration;
+use App\Utils\LocaleSettings;
+use NumberFormatter;
+use Symfony\Component\Intl\Intl;
+use Symfony\Contracts\Translation\TranslatorInterface;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFilter;
+use Twig\TwigFunction;
+
+class TitleExtension extends AbstractExtension
+{
+    /**
+     * @var TranslatorInterface
+     */
+    protected $translator;
+
+    /**
+     * @param TranslatorInterface $translator
+     */
+    public function __construct(TranslatorInterface $translator)
+    {
+        $this->translator = $translator;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFunctions()
+    {
+        return [
+            new TwigFunction('get_title', [$this, 'generateTitle']),
+        ];
+    }
+
+    /**
+     * @param null|string $prefix
+     * @param string $delimiter
+     * @return string
+     */
+    public function generateTitle(?string $prefix = null, string $delimiter = ' – ')
+    {
+        return ($prefix ?? '') . 'Kimai' . $delimiter . $this->translator->trans('time_tracking', [], 'messages');
+    }
+}