Use the users timezone for showing dates from the database.

In the database the values are now saved in UTC.

config/packages/doctrine.yaml

@@ -16,6 +16,9 @@ doctrine:
             collate: utf8mb4_unicode_ci
 
         url: '%env(resolve:DATABASE_URL)%'
+        types:
+            datetime: App\Helpers\UTCDateTimeType
+            date: App\Helpers\UTCDateTimeType
 
         schema_filter: ~^(?!internal|log)~
 

config/services.yaml

@@ -6,6 +6,7 @@
 
 parameters:
     locale: 'en'                # Set the default language to use her
+    timezone: 'Europe/Berlin'
     partdb_title: 'Part-DB'     # The title shown inside of Part-DB (e.g. in the navbar and on homepage)
     banner: ''                  # The info text shown in the homepage
     use_gravatar: true          # Set to false, if no Gravatar images should be used for user profiles.
@@ -69,6 +70,10 @@ services:
       arguments:
         $base_currency: '%default_currency%'
 
+    App\EventSubscriber\TimezoneListener:
+        arguments:
+            $timezone: '%timezone%'
+
     App\Services\TranslationExtractor\PermissionExtractor:
         tags:
             - { name: 'translation.extractor', alias: 'permissionExtractor'}

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'
+        ];
+    }
+}

src/Form/UserSettingsType.php

@@ -68,6 +68,7 @@ class UserSettingsType extends AbstractType
                 'attr' => ['class' => 'selectpicker', 'data-live-search' => true],
                 'placeholder' => $this->trans->trans('user_settings.timezone.placeholder'),
                 'label' => $this->trans->trans('user.timezone.label'),
+                'preferred_choices' => ['Europe/Berlin']
                 ])
             ->add('theme', ChoiceType::class, [
                 'required' => false,

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;
+    }
+}