Use the users timezone for showing dates from the database.

In the database the values are now saved in UTC.

src/Helpers/UTCDateTimeType.php

@@ -0,0 +1,78 @@
+<?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\Helpers;
+
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use Doctrine\DBAL\Types\ConversionException;
+use Doctrine\DBAL\Types\DateTimeType;
+
+/**
+ * This DateTimeType all dates to UTC, so it can be later used with the timezones.
+ * Taken from here: https://www.doctrine-project.org/projects/doctrine-orm/en/2.6/cookbook/working-with-datetime.html
+ * @package App\Helpers
+ */
+class UTCDateTimeType extends DateTimeType
+{
+    private static $utc;
+
+    public function convertToDatabaseValue($value, AbstractPlatform $platform)
+    {
+        if ($value instanceof \DateTime) {
+            $value->setTimezone(self::$utc);
+        }
+
+        return parent::convertToDatabaseValue($value, $platform);
+    }
+
+    public function convertToPHPValue($value, AbstractPlatform $platform)
+    {
+        if (null === $value || $value instanceof \DateTime) {
+            return $value;
+        }
+
+        $converted = \DateTime::createFromFormat(
+            $platform->getDateTimeFormatString(),
+            $value,
+            self::$utc ? self::$utc : self::$utc = new \DateTimeZone('UTC')
+        );
+
+        if (! $converted) {
+            throw ConversionException::conversionFailedFormat(
+                $value,
+                $this->getName(),
+                $platform->getDateTimeFormatString()
+            );
+        }
+
+        return $converted;
+    }
+}