Use the users timezone for showing dates from the database.

In the database the values are now saved in UTC.

src/EventSubscriber/TimezoneListener.php

@@ -0,0 +1,104 @@
+<?php
+/**
+ *
+ * part-db version 0.1
+ * Copyright (C) 2005 Christoph Lechner
+ * http://www.cl-projects.de/
+ *
+ * part-db version 0.2+
+ * Copyright (C) 2009 K. Jacobs and others (see authors.php)
+ * http://code.google.com/p/part-db/
+ *
+ * Part-DB Version 0.4+
+ * Copyright (C) 2016 - 2019 Jan Böhmer
+ * https://github.com/jbtronics
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ */
+
+namespace App\EventSubscriber;
+
+
+use App\Entity\UserSystem\User;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\ControllerEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\Security\Core\Security;
+
+/**
+ * The purpose of this event listener is to set the timezone to the one preferred by the user.
+ * @package App\EventSubscriber
+ */
+class TimezoneListener implements EventSubscriberInterface
+{
+
+    protected $default_timezone;
+    protected $security;
+
+    public function __construct(string $timezone, Security $security)
+    {
+        $this->default_timezone = $timezone;
+        $this->security = $security;
+    }
+
+    public function setTimeZone(ControllerEvent $event)
+    {
+        $timezone = null;
+
+        //Check if the user has set a timezone
+        $user = $this->security->getUser();
+        if ($user instanceof User && !empty($user->getTimezone())) {
+            $timezone = $user->getTimezone();
+        }
+
+        //Fill with default value if needed
+        if ($timezone === null && !empty($this->default_timezone)) {
+            $timezone = $this->default_timezone;
+        }
+
+        //If timezone was configured anywhere set it, otherwise just use the one from php.ini
+        if ($timezone !== null) {
+            date_default_timezone_set($timezone);
+
+        }
+    }
+
+    /**
+     * Returns an array of event names this subscriber wants to listen to.
+     *
+     * The array keys are event names and the value can be:
+     *
+     *  * The method name to call (priority defaults to 0)
+     *  * An array composed of the method name to call and the priority
+     *  * An array of arrays composed of the method names to call and respective
+     *    priorities, or 0 if unset
+     *
+     * For instance:
+     *
+     *  * ['eventName' => 'methodName']
+     *  * ['eventName' => ['methodName', $priority]]
+     *  * ['eventName' => [['methodName1', $priority], ['methodName2']]]
+     *
+     * @return array The event names to listen to
+     */
+    public static function getSubscribedEvents()
+    {
+        //Set the timezone shortly before executing the controller
+        return [
+            KernelEvents::CONTROLLER => 'setTimeZone'
+        ];
+    }
+}