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<?php
/**
* Piwik - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\DeviceDetector;
use DeviceDetector\DeviceDetector;
use Piwik\Common;
class DeviceDetectorFactory
{
protected static $deviceDetectorInstances = array();
/**
* Returns an instance of DeviceDetector for the given user agent. Uses template method pattern
* and calls getDeviceDetectionInfo() when it doesn't find a matching instance in the cache.
* @param string $userAgent
* @return DeviceDetector|mixed
*/
public function makeInstance($userAgent)
{
$userAgent = self::getNormalizedUserAgent($userAgent);
if (array_key_exists($userAgent, self::$deviceDetectorInstances)) {
return self::$deviceDetectorInstances[$userAgent];
}
$deviceDetector = $this->getDeviceDetectionInfo($userAgent);
self::$deviceDetectorInstances[$userAgent] = $deviceDetector;
return $deviceDetector;
}
public static function getNormalizedUserAgent($userAgent)
{
return Common::mb_substr(trim($userAgent), 0, 500);
}
/**
* Creates a new DeviceDetector for the user agent. Called by makeInstance() when no matching instance
* was found in the cache.
* @param $userAgent
* @return DeviceDetector
*/
protected function getDeviceDetectionInfo($userAgent)
{
$deviceDetector = new DeviceDetector($userAgent);
$deviceDetector->discardBotInformation();
$deviceDetector->setCache(new DeviceDetectorCache(86400));
$deviceDetector->parse();
return $deviceDetector;
}
public static function clearInstancesCache()
{
self::$deviceDetectorInstances = array();
}
}
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