use pre-defined icons in menu as well (#913)

src/Twig/IconExtension.php

@@ -0,0 +1,89 @@
+<?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 Twig\Extension\AbstractExtension;
+use Twig\TwigFilter;
+
+final class IconExtension extends AbstractExtension
+{
+    /**
+     * @var string[]
+     */
+    private static $icons = [
+        'activity' => 'fas fa-tasks',
+        'admin' => 'fas fa-wrench',
+        'calendar' => 'far fa-calendar-alt',
+        'customer' => 'fas fa-user-tie',
+        'copy' => 'far fa-copy',
+        'create' => 'far fa-plus-square',
+        'dashboard' => 'fas fa-tachometer-alt',
+        'delete' => 'far fa-trash-alt',
+        'download' => 'fas fa-download',
+        'duration' => 'far fa-hourglass',
+        'edit' => 'far fa-edit',
+        'filter' => 'fas fa-filter',
+        'help' => 'far fa-question-circle',
+        'invoice' => 'fas fa-file-invoice',
+        'list' => 'fas fa-list',
+        'logout' => 'fas fa-sign-out-alt',
+        'manual' => 'fas fa-book',
+        'money' => 'far fa-money-bill-alt',
+        'print' => 'fas fa-print',
+        'project' => 'fas fa-briefcase',
+        'repeat' => 'fas fa-redo-alt',
+        'start' => 'fas fa-play-circle',
+        'start-small' => 'far fa-play-circle',
+        'stop' => 'fas fa-stop',
+        'stop-small' => 'far fa-stop-circle',
+        'timesheet' => 'fas fa-clock',
+        'trash' => 'far fa-trash-alt',
+        'user' => 'fas fa-users',
+        'visibility' => 'far fa-eye',
+        'settings' => 'fas fa-cog',
+        'export' => 'fas fa-file-export',
+        'pdf' => 'fas fa-file-pdf',
+        'csv' => 'fas fa-table',
+        'ods' => 'fas fa-table',
+        'xlsx' => 'fas fa-file-excel',
+        'on' => 'fas fa-toggle-on',
+        'off' => 'fas fa-toggle-off',
+        'audit' => 'fas fa-history',
+        'home' => 'fas fa-home',
+        'shop' => 'fas fa-shopping-cart',
+        'about' => 'fas fa-info-circle',
+        'debug' => 'far fa-file-alt',
+        'profile-stats' => 'far fa-chart-bar',
+        'profile' => 'fas fa-user-edit',
+        'warning' => 'fas fa-exclamation-triangle',
+        'permissions' => 'fas fa-user-lock',
+        'back' => 'fas fa-long-arrow-alt-left',
+        'tag' => 'fas fa-tags',
+        'avatar' => 'fas fa-user',
+        'timesheet-team' => 'fas fa-user-clock',
+        'plugin' => 'fas fa-plug',
+        'configuration' => 'fas fa-cogs',
+    ];
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getFilters()
+    {
+        return [
+            new TwigFilter('icon', [$this, 'icon']),
+        ];
+    }
+
+    public function icon(string $name, string $default = ''): string
+    {
+        return self::$icons[$name] ?? $default;
+    }
+}