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<?php
/**
* Timezone Awareness Decorator.
*
* @package Silla.IO
* @subpackage Core\Modules\DB\Decorators
* @author Plamen Nikolov <plamen@athlonsofia.com>
* @copyright Copyright (c) 2015, Silla.io
* @license http://opensource.org/licenses/GPL-3.0 GNU General Public License, version 3.0 (GPLv3)
*/
namespace Core\Modules\DB\Decorators;
use Core;
use Core\Base;
use Core\Helpers;
use Core\Modules\DB;
/**
* Class Timezones Decorator Implementation definition.
*/
abstract class TimezoneAwareness implements DB\Interfaces\Decorator
{
/**
* Timezone aware fields.
*
* @var array
* @static
*/
private static $timezoneAwareFields = array();
/**
* Decorator entry point.
*
* @param Base\Model $resource Currently processed resource.
*
* @static
* @access public
*
* @return void
*/
public static function decorate(Base\Model $resource)
{
if (date_default_timezone_get() !== 'UTC') {
$resource->on('beforePopulate', array(__CLASS__, 'init'));
$resource->on('beforeSave', array(__CLASS__, 'remove'));
$resource->on('afterSave', array(__CLASS__, 'add'));
$resource->on('afterCreate', array(__CLASS__, 'add'));
}
}
/**
* Initialize serialization.
*
* @param Interfaces\TimezoneAwareness $resource Currently processed resource.
*
* @static
* @access public
*
* @return void
*/
public static function init(Interfaces\TimezoneAwareness $resource)
{
self::$timezoneAwareFields = $resource::timezoneAwareFields();
}
/**
* Removes timezone effect.
*
* @param Interfaces\TimezoneAwareness $resource Currently processed resource.
*
* @static
* @access public
*
* @return void
*/
public static function remove(Interfaces\TimezoneAwareness $resource)
{
if (date_default_timezone_get() !== 'UTC') {
self::removeTimezoneEffect($resource);
}
}
/**
* Applies timezone effect.
*
* @param Interfaces\TimezoneAwareness $resource Currently processed resource.
*
* @static
* @access public
*
* @return void
*/
public static function add(Interfaces\TimezoneAwareness $resource)
{
if (date_default_timezone_get() !== 'UTC') {
self::applyTimezoneEffect($resource);
}
}
/**
* Calculates timezone offset which needs to be added.
*
* @param Interfaces\TimezoneAwareness $resource Currently processed resource.
*
* @static
* @access private
*
* @return void
*/
private static function applyTimezoneEffect(Interfaces\TimezoneAwareness $resource)
{
foreach ($resource::timezoneAwareFields() as $datetime_field) {
if ($resource->{$datetime_field}) {
$resource->{$datetime_field} = Helpers\DateTime::format($resource->{$datetime_field});
}
}
}
/**
* Calculates timezone offset which needs to be removed.
*
* @param Interfaces\TimezoneAwareness $resource Currently processed resource.
*
* @static
* @access private
*
* @return void
*/
private static function removeTimezoneEffect(Interfaces\TimezoneAwareness $resource)
{
foreach ($resource::timezoneAwareFields() as $datetime_field) {
if ($resource->{$datetime_field}) {
$resource->{$datetime_field} = Helpers\DateTime::formatGmt($resource->{$datetime_field});
}
}
}
}