cleanup global context usage in widgets

src/Twig/Runtime/ThemeEventExtension.php

@@ -0,0 +1,49 @@
+<?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\Runtime;
+
+use App\Event\ThemeEvent;
+use App\Security\CurrentUser;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Twig\Extension\RuntimeExtensionInterface;
+
+final class ThemeEventExtension implements RuntimeExtensionInterface
+{
+    /**
+     * @var EventDispatcherInterface
+     */
+    private $eventDispatcher;
+    /**
+     * @var CurrentUser
+     */
+    private $user;
+
+    public function __construct(EventDispatcherInterface $dispatcher, CurrentUser $user)
+    {
+        $this->eventDispatcher = $dispatcher;
+        $this->user = $user;
+    }
+
+    /**
+     * @param string $eventName
+     * @param mixed|null $payload
+     * @return ThemeEvent
+     */
+    public function trigger(string $eventName, $payload = null): ThemeEvent
+    {
+        $themeEvent = new ThemeEvent($this->user->getUser(), $payload);
+
+        if ($this->eventDispatcher->hasListeners($eventName)) {
+            $this->eventDispatcher->dispatch($themeEvent, $eventName);
+        }
+
+        return $themeEvent;
+    }
+}