/
BrowserLocaleGuesser.php
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/
BrowserLocaleGuesser.php
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<?php
/**
* This file is part of the LuneticsLocaleBundle package.
*
* <https://github.com/lunetics/LocaleBundle/>
*
* For the full copyright and license information, please view the LICENSE
* file that is distributed with this source code.
*/
namespace Lunetics\LocaleBundle\LocaleGuesser;
use Symfony\Component\HttpFoundation\Request;
use Lunetics\LocaleBundle\Validator\MetaValidator;
/**
* Locale Guesser for detecing the locale from the browser Accept-language string
*
* @author Matthias Breddin <mb@lunetics.com>
* @author Christophe Willemsen <willemsen.christophe@gmail.com>
*/
class BrowserLocaleGuesser implements LocaleGuesserInterface
{
/**
* @var string
*/
private $identifiedLocale;
/**
* @var MetaValidator
*/
private $metaValidator;
/**
* Constructor
*
* @param MetaValidator $metaValidator MetaValidator
*/
public function __construct(MetaValidator $metaValidator)
{
$this->metaValidator = $metaValidator;
}
/**
* Guess the locale based on the browser settings
*
* @param Request $request
*
* @return boolean
*/
public function guessLocale(Request $request)
{
$validator = $this->metaValidator;
// Get the preferred locale from the Browser.
$preferredLocale = $request->getPreferredLanguage();
$availableLocales = $request->getLanguages();
if (!$preferredLocale OR count($availableLocales) === 0) {
return false;
}
// If the preferred primary locale is allowed, return the locale.
if ($validator->isAllowed($preferredLocale)) {
$this->identifiedLocale = $preferredLocale;
return true;
}
// Get a list of available and allowed locales and return the first result
$matchLocale = function ($v) use ($validator) {
return $validator->isAllowed($v);
};
$result = array_values(array_filter($availableLocales, $matchLocale));
if (!empty($result)) {
$this->identifiedLocale = $result[0];
return true;
}
return false;
}
/**
* {@inheritDoc}
*/
public function getIdentifiedLocale()
{
if (null === $this->identifiedLocale) {
return false;
}
return $this->identifiedLocale;
}
}