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<?php
/**
* ua-parser
*
* Copyright (c) 2011-2013 Dave Olsen, http://dmolsen.com
* Copyright (c) 2013-2014 Lars Strojny, http://usrportage.de
*
* Released under the MIT license
*/
namespace UAParser;
use UAParser\Exception\FileNotFoundException;
abstract class AbstractParser
{
/** @var array */
protected $regexes = [];
public function __construct(array $regexes)
{
$this->regexes = $regexes;
}
protected static function tryMatch(array $regexes, string $userAgent): array
{
foreach ($regexes as $regex) {
if (preg_match($regex['regex'], $userAgent, $matches)) {
$defaults = [
1 => 'Other',
2 => null,
3 => null,
4 => null,
5 => null,
];
return [$regex, $matches + $defaults];
}
}
return [null, null];
}
protected static function multiReplace(array $regex, string $key, ?string $default, array $matches): ?string
{
if (!isset($regex[$key])) {
return self::emptyStringToNull($default);
}
$replacement = preg_replace_callback(
'|\$(?P<key>\d)|',
static function ($m) use ($matches) {
return $matches[$m['key']] ?? '';
},
$regex[$key]
);
return self::emptyStringToNull($replacement);
}
private static function emptyStringToNull(?string $string): ?string
{
$string = trim($string ?? '');
return $string === '' ? null : $string;
}
}