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<?php |
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/** |
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* Quantum PHP Framework |
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* |
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* An open source software development framework for PHP |
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* |
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* @package Quantum |
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* @author Arman Ag. <[email protected]> |
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* @copyright Copyright (c) 2018 Softberg LLC (https://softberg.org) |
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* @link http://quantum.softberg.org/ |
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* @since 2.9.9 |
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*/ |
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namespace Quantum\Libraries\Lang\Factories; |
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use Quantum\Libraries\Lang\Exceptions\LangException; |
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use Quantum\Config\Exceptions\ConfigException; |
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use Quantum\Di\Exceptions\DiException; |
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use Quantum\Libraries\Lang\Translator; |
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use Quantum\Libraries\Lang\Lang; |
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use Quantum\Http\Request; |
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use Quantum\Loader\Setup; |
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use ReflectionException; |
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/** |
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* Class LangFactory |
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* @package Quantum\Libraries\Lang |
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*/ |
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class LangFactory |
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{ |
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/** |
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* @var Lang|null Cached Lang instance |
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*/ |
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private static $instance = null; |
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/** |
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* @return Lang |
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* @throws ConfigException |
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* @throws LangException |
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* @throws DiException |
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* @throws ReflectionException |
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*/ |
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public static function get(): Lang |
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{ |
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if (self::$instance !== null) { |
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return self::$instance; |
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} |
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list($isEnabled, $supported, $default) = self::loadLangConfig(); |
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$lang = self::detectLanguage($supported, $default); |
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$translator = new Translator($lang); |
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return self::$instance = new Lang($lang, $isEnabled, $translator); |
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} |
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/** |
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* @return array |
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* @throws ConfigException |
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* @throws DiException |
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* @throws ReflectionException |
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*/ |
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private static function loadLangConfig(): array |
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{ |
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if (!config()->has('lang')) { |
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config()->import(new Setup('config', 'lang')); |
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} |
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return [ |
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filter_var(config()->get('lang.enabled'), FILTER_VALIDATE_BOOLEAN), |
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(array)config()->get('lang.supported'), |
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config()->get('lang.default'), |
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]; |
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} |
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/** |
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* @param array $supported |
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* @param string|null $default |
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* @return string |
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* @throws LangException |
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*/ |
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private static function detectLanguage(array $supported, ?string $default): string |
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{ |
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$lang = self::getLangFromQuery($supported); |
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if (empty($lang)) { |
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$lang = self::getLangFromUrlSegment($supported); |
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} |
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if (empty($lang)) { |
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$lang = self::getLangFromHeader($supported); |
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} |
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if (empty($lang)) { |
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$lang = $default; |
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} |
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if (!$lang) { |
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throw LangException::misconfiguredDefaultConfig(); |
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} |
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return $lang; |
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} |
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/** |
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* @param array $supported |
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* @return string|null |
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*/ |
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private static function getLangFromQuery(array $supported): ?string |
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{ |
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$queryLang = Request::getQueryParam('lang'); |
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return $queryLang && in_array($queryLang, $supported) ? $queryLang : null; |
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} |
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/** |
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* @param array $supported |
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* @return string|null |
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*/ |
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private static function getLangFromUrlSegment(array $supported): ?string |
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{ |
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$segmentIndex = (int)config()->get('lang.url_segment'); |
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if (!empty(route_prefix()) && $segmentIndex == 1) { |
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$segmentIndex++; |
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} |
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$segmentLang = Request::getSegment($segmentIndex); |
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return $segmentLang && in_array($segmentLang, $supported) ? $segmentLang : null; |
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} |
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/** |
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* @param array $supported |
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* @return string|null |
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*/ |
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private static function getLangFromHeader(array $supported): ?string |
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{ |
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$acceptedLang = server()->acceptedLang(); |
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return $acceptedLang && in_array($acceptedLang, $supported) ? $acceptedLang : null; |
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} |
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} |
softberg /
quantum-php-core
