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<?php namespace Fisharebest\Localization; |
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use DomainException; |
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use Fisharebest\Localization\Locale\LocaleInterface; |
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/** |
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* Class Locale - Static functions to generate and compare locales. |
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* |
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* @author Greg Roach <[email protected]> |
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* @copyright (c) 2018 Greg Roach |
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* @license GPLv3+ |
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*/ |
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class Locale |
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{ |
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/** |
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* Callback for PHP sort functions - allows lists of locales to be sorted. |
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* Diacritics are removed and text is capitalized to allow fast/simple sorting. |
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* |
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* @param LocaleInterface $x |
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* @param LocaleInterface $y |
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* |
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* @return int |
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*/ |
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public static function compare(LocaleInterface $x, LocaleInterface $y) |
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{ |
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return strcmp($x->endonymSortable(), $y->endonymSortable()); |
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} |
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/** |
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* Create a locale from a language tag (or locale code). |
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* |
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* @param string $code |
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* |
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* @return LocaleInterface |
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* @throws DomainException |
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*/ |
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public static function create($code) |
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{ |
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$class = __NAMESPACE__ . '\Locale\Locale' . implode(array_map(function ($x) { |
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return ucfirst(strtolower($x)); |
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}, preg_split('/[^a-zA-Z0-9]+/', $code))); |
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if (class_exists($class)) { |
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return new $class(); |
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} else { |
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throw new DomainException($code); |
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} |
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} |
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/** |
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* Create a locale from a language tag (or locale code). |
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* |
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* @param string[] $server The $_SERVER array |
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* @param LocaleInterface[] $available All locales supported by the application |
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* @param LocaleInterface $default Locale to show in no matching locales |
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* |
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* @return LocaleInterface |
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*/ |
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public static function httpAcceptLanguage(array $server, array $available, LocaleInterface $default) |
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{ |
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if (!empty($server['HTTP_ACCEPT_LANGUAGE'])) { |
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$http_accept_language = strtolower(str_replace(' ', '', $server['HTTP_ACCEPT_LANGUAGE'])); |
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preg_match_all('/(?:([a-z][a-z0-9_-]+)(?:;q=([0-9.]+))?)/', $http_accept_language, $match); |
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$preferences = array_map(function ($x) { |
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return $x === '' ? 1.0 : (float) $x; |
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}, array_combine($match[1], $match[2])); |
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// Need a stable sort, as the original order is significant |
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$preferences = array_map(function ($x) { |
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static $n = 0; |
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return array($x, --$n); |
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}, $preferences); |
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arsort($preferences); |
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$preferences = array_map(function ($x) { |
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return $x[0]; |
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}, $preferences); |
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// If "de-DE" requested, but not "de", then add it at a lower priority |
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foreach ($preferences as $code => $priority) { |
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if (preg_match('/^([a-z]+)[^a-z]/', $code, $match) && !isset($preferences[$match[1]])) { |
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$preferences[$match[1]] = $priority * 0.5; |
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} |
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} |
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foreach (array_keys($preferences) as $code) { |
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try { |
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$locale = Locale::create($code); |
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if (in_array($locale, $available)) { |
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return $locale; |
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} |
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} catch (DomainException $ex) { |
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// An unknown locale? Ignore it. |
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} |
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} |
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} |
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return $default; |
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} |
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} |
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fisharebest /
localization
