From 14b6e4056231e12b4826432dfd7d5c60796e08b2 Mon Sep 17 00:00:00 2001
From: Johannes Meyer <johannes.meyer@icinga.com>
Date: Tue, 16 Apr 2019 15:57:27 +0200
Subject: [PATCH] DbConnection: Set current user's timezone on the connection

resolves #3525
---
 library/Icinga/Data/Db/DbConnection.php | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/library/Icinga/Data/Db/DbConnection.php b/library/Icinga/Data/Db/DbConnection.php
index e1b59011c..3681d9908 100644
--- a/library/Icinga/Data/Db/DbConnection.php
+++ b/library/Icinga/Data/Db/DbConnection.php
@@ -3,6 +3,8 @@
 
 namespace Icinga\Data\Db;
 
+use DateTime;
+use DateTimeZone;
 use Exception;
 use Icinga\Data\Inspectable;
 use Icinga\Data\Inspection;
@@ -205,6 +207,7 @@ class DbConnection implements Selectable, Extensible, Updatable, Reducible, Insp
                     $driverOptions[PDO::MYSQL_ATTR_INIT_COMMAND] .= ', NAMES ' . $adapterParamaters['charset'];
                     unset($adapterParamaters['charset']);
                 }
+                $driverOptions[PDO::MYSQL_ATTR_INIT_COMMAND] .= ', time_zone=\'' . $this->getTimezoneOffset() . '\'';
                 $driverOptions[PDO::MYSQL_ATTR_INIT_COMMAND] .=';';
                 $defaultPort = 3306;
                 break;
@@ -287,6 +290,22 @@ class DbConnection implements Selectable, Extensible, Updatable, Reducible, Insp
         return $this;
     }
 
+    /**
+     * Get offset from the current default timezone to GMT
+     *
+     * @return string
+     */
+    public function getTimezoneOffset()
+    {
+        $tz = new DateTimeZone(date_default_timezone_get());
+        $offset = $tz->getOffset(new DateTime());
+        $prefix = $offset >= 0 ? '+' : '-';
+        $offset = abs($offset);
+        $hours = (int) floor($offset / 3600);
+        $minutes = (int) floor(($offset % 3600) / 60);
+        return sprintf('%s%d:%02d', $prefix, $hours, $minutes);
+    }
+
     /**
      * Count all rows of the result set
      *