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<?php
/* Icinga Web 2 | (c) 2021 Icinga GmbH | GPLv2+ */
namespace Icinga\Web;
/**
* Class UserAgent
*
* This class helps to get user agent information like OS type and browser name
*
* @package Icinga\Web
*/
class UserAgent
{
/**
* $_SERVER['HTTP_USER_AGENT'] output string
*
* @var string|null
*/
private $agent;
public function __construct($agent = null)
{
$this->agent = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null;
if ($agent) {
$this->agent = $agent->http_user_agent;
}
}
/**
* Return $_SERVER['HTTP_USER_AGENT'] output string of given or current device
*
* @return string
*/
public function getAgent()
{
return $this->agent;
}
/**
* Get Browser name
*
* @return string Browser name or unknown if not found
*/
public function getBrowser()
{
// key => regex value
$browsers = [
"Internet Explorer" => "/MSIE(.*)/i",
"Seamonkey" => "/Seamonkey(.*)/i",
"MS Edge" => "/Edg(.*)/i",
"Opera" => "/Opera(.*)/i",
"Opera Browser" => "/OPR(.*)/i",
"Chromium" => "/Chromium(.*)/i",
"Firefox" => "/Firefox(.*)/i",
"Google Chrome" => "/Chrome(.*)/i",
"Safari" => "/Safari(.*)/i"
];
//TODO find a way to return also the version of the browser
foreach ($browsers as $browser => $regex) {
if (preg_match($regex, $this->agent)) {
return $browser;
}
}
return 'unknown';
}
/**
* Get Operating system information
*
* @return string os information
*/
public function getOs()
{
// get string before the first appearance of ')'
$device = strstr($this->agent, ')', true);
if (! $device) {
return 'unknown';
}
// return string after the first appearance of '('
return substr($device, strpos($device, '(') + 1);
}
}
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