Use DatetimeImmutable instead of DateTime wherever possible

src/Doctrine/Types/UTCDateTimeImmutableType.php

@@ -0,0 +1,97 @@
+<?php
+/**
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ * Copyright (C) 2019 - 2022 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 Affero General Public License as published
+ * by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\Doctrine\Types;
+
+use DateTime;
+use DateTimeInterface;
+use DateTimeZone;
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use Doctrine\DBAL\Types\ConversionException;
+use Doctrine\DBAL\Types\DateTimeImmutableType;
+use Doctrine\DBAL\Types\DateTimeType;
+use Doctrine\DBAL\Types\Exception\InvalidFormat;
+
+/**
+ * This DateTimeImmutableType all dates to UTC, so it can be later used with the timezones.
+ * Taken (and adapted) from here: https://www.doctrine-project.org/projects/doctrine-orm/en/2.6/cookbook/working-with-datetime.html.
+ */
+class UTCDateTimeImmutableType extends DateTimeImmutableType
+{
+    private static ?DateTimeZone $utc_timezone = null;
+
+    /**
+     * {@inheritdoc}
+     *
+     * @param T $value
+     *
+     * @return (T is null ? null : string)
+     *
+     * @template T
+     */
+    public function convertToDatabaseValue($value, AbstractPlatform $platform): ?string
+    {
+        if (!self::$utc_timezone instanceof \DateTimeZone) {
+            self::$utc_timezone = new DateTimeZone('UTC');
+        }
+
+        if ($value instanceof \DateTimeImmutable) {
+            $value = $value->setTimezone(self::$utc_timezone);
+        }
+
+        return parent::convertToDatabaseValue($value, $platform);
+    }
+
+    /**
+     * {@inheritDoc}
+     *
+     * @param T $value
+     *
+     * @template T
+     */
+    public function convertToPHPValue($value, AbstractPlatform $platform): ?\DateTimeImmutable
+    {
+        if (!self::$utc_timezone instanceof \DateTimeZone) {
+            self::$utc_timezone = new DateTimeZone('UTC');
+        }
+
+        if (null === $value || $value instanceof \DateTimeImmutable) {
+            return $value;
+        }
+
+        $converted = \DateTimeImmutable::createFromFormat(
+            $platform->getDateTimeFormatString(),
+            $value,
+            self::$utc_timezone
+        );
+
+        if (!$converted) {
+            throw InvalidFormat::new(
+                $value,
+                static::class,
+                $platform->getDateTimeFormatString(),
+            );
+        }
+
+        return $converted;
+    }
+}