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<?php
namespace Bitrix\ABTest;
use Bitrix\Main;
use Bitrix\Main\Type;
class Helper
{
/**
* Returns active A/B-test
*
* @return array|null
*/
public static function getActiveTest()
{
static $abtest;
static $defined;
if (!defined('SITE_ID') || !SITE_ID)
return null;
if (empty($defined))
{
$cache = new \CPHPCache();
if ($cache->initCache(30*24*3600, 'abtest_active_'.SITE_ID, 'abtest/'))
{
$abtest = $cache->getVars();
}
else
{
$abtest = ABTestTable::getList(array(
'order' => array('SORT' => 'ASC'),
'filter' => array(
'=SITE_ID' => SITE_ID,
'=ACTIVE' => 'Y',
'<=START_DATE' => new Type\DateTime()
),
'limit' => 1
))->fetch() ?: [];
$cache->startDataCache();
$cache->endDataCache($abtest);
}
$defined = true;
if (!empty($abtest))
{
if (!$abtest['MIN_AMOUNT'])
{
$capacity = AdminHelper::getSiteCapacity($abtest['SITE_ID']);
if ($capacity['min'] > 0)
{
$result = ABTestTable::update($abtest['ID'], array('MIN_AMOUNT' => $capacity['min']));
if ($result->isSuccess())
{
$cache->clean('abtest_active_'.SITE_ID, '/abtest');
$abtest['MIN_AMOUNT'] = $capacity['min'];
}
}
}
if (intval($abtest['DURATION']) == -1)
{
if (intval($abtest['MIN_AMOUNT']) > 0)
{
$capacity = AdminHelper::getTestCapacity($abtest['ID']);
if ($capacity['A'] >= $abtest['MIN_AMOUNT'] && $capacity['B'] >= $abtest['MIN_AMOUNT'])
{
Helper::stopTest($abtest['ID'], true);
$abtest = null;
}
}
}
else if (intval($abtest['DURATION']) > 0)
{
$end = clone $abtest['START_DATE'];
$end->add(intval($abtest['DURATION']).' days');
if (time() > $end->format('U'))
{
Helper::stopTest($abtest['ID'], true);
$abtest = null;
}
}
}
}
return $abtest;
}
/**
* Returns an A/B-test context array
*
* @param array $abtest A/B-test.
* @param string $section Section.
* @return array
*/
private static function context($abtest, $section)
{
return array(
'abtest' => intval($abtest['ID']),
'section' => $section,
'data' => $abtest['TEST_DATA']
);
}
/**
* Returns current A/B-test context
*
* @return array|null
*/
public static function getContext()
{
global $USER, $APPLICATION;
static $context;
if (!defined('SITE_ID') || !SITE_ID)
return null;
if (empty($context))
{
$activeTest = Helper::getActiveTest();
$isAbtestAdmin = is_object($USER) && $USER->canDoOperation('view_other_settings');
if ($isAbtestAdmin && !empty($_SESSION['ABTEST_MODE']))
{
if ($_SESSION['ABTEST_MODE'] == 'reset')
{
if (!empty($activeTest))
$context = Helper::context($activeTest, 'N');
unset($_SESSION['ABTEST_MODE']);
}
else if (preg_match('/^(\d+)\|(A|B|N)$/', $_SESSION['ABTEST_MODE'], $matches))
{
if (!empty($activeTest) && $activeTest['ID'] == intval($matches[1]))
{
$context = Helper::context($activeTest, $matches[2]);
unset($_SESSION['ABTEST_MODE']);
}
else
{
$abtest = ABTestTable::getList(array(
'filter' => array('=ID' => intval($matches[1]), 'ENABLED' => 'Y')
))->fetch();
if (!empty($abtest) && $abtest['SITE_ID'] == SITE_ID)
$context = Helper::context($abtest, $matches[2]);
}
}
}
$cookieValue = $APPLICATION->get_cookie('ABTEST_'.SITE_ID);
if (empty($context) && !empty($activeTest))
{
$abtest = $activeTest;
if (!empty($cookieValue))
{
if (preg_match('/^'.intval($abtest['ID']).'\|(A|B|N)$/i', $cookieValue, $matches))
$section = $matches[1];
}
if (empty($section))
{
$dice = mt_rand(1, 100);
if ($dice <= intval($abtest['PORTION'])/2)
$section = 'A';
else if ($dice <= intval($abtest['PORTION']))
$section = 'B';
else
$section = 'N';
}
$context = Helper::context($abtest, $section);
}
if (empty($activeTest) || $activeTest['ID'] == $context['abtest'])
{
$newValue = empty($activeTest) ? null : sprintf('%u|%s', $context['abtest'], $context['section']);
if (!(empty($cookieValue) && empty($newValue)) && $cookieValue !== $newValue)
{
$cookie = new Main\Web\Cookie(sprintf('ABTEST_%s', SITE_ID), $newValue);
Main\Context::getCurrent()->getResponse()->addCookie($cookie);
}
}
}
return $context;
}
/**
* Returns alternative test value for current A/B-test context
*
* @param string $type Test type.
* @param string $value Test original value.
* @return string|null
*/
public static function getAlternative($type, $value)
{
$result = null;
if ($context = Helper::getContext())
{
foreach ($context['data']['list'] as $item)
{
if ($item['type'] == $type && $item['old_value'] == $value)
{
$result = $item['new_value'];
break;
}
}
}
return $result;
}
/**
* Starts an A/B-test
*
* @param int $id A/B-test ID.
* @return bool
*/
public static function startTest($id)
{
global $USER;
if ($abtest = ABTestTable::getById($id)->fetch())
{
$fields = array(
'START_DATE' => new Type\DateTime(),
'STOP_DATE' => null,
'ACTIVE' => 'Y',
'USER_ID' => $USER->getID()
);
if (!$abtest['MIN_AMOUNT'])
{
$capacity = AdminHelper::getSiteCapacity($abtest['SITE_ID']);
if ($capacity['min'] > 0)
$fields['MIN_AMOUNT'] = $capacity['min'];
}
$result = ABTestTable::update(intval($id), $fields);
if ($result->isSuccess())
{
Helper::clearCache($abtest['SITE_ID']);
return true;
}
}
return false;
}
/**
* Stops an A/B-test
*
* @param int $id A/B-test ID.
* @param bool $auto Auto-stop flag.
* @return bool
*/
public static function stopTest($id, $auto = false)
{
global $USER;
if ($abtest = ABTestTable::getById($id)->fetch())
{
$fields = array(
'STOP_DATE' => new Type\DateTime(),
'ACTIVE' => 'N',
);
if (!$auto)
$fields['USER_ID'] = $USER->getID();
$result = ABTestTable::update(intval($id), $fields);
if ($result->isSuccess())
{
Helper::clearCache($abtest['SITE_ID']);
return true;
}
}
return false;
}
/**
* Deletes an A/B-test
*
* @param int $id A/B-test ID.
* @return bool
*/
public static function deleteTest($id)
{
if ($abtest = ABTestTable::getById($id)->fetch())
{
$result = ABTestTable::delete(intval($id));
if ($result->isSuccess())
{
if ($abtest['ACTIVE'] == 'Y')
Helper::clearCache($abtest['SITE_ID']);
return true;
}
}
return false;
}
/**
* Cleans active A/B-test cache
*
* @param int $siteId Site ID.
* @return void
*/
public static function clearCache($siteId)
{
$cache = new \CPHPCache();
$cache->clean('abtest_active_'.$siteId, '/abtest');
}
}