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<?php |
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/** |
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* PrivateBin |
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* |
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* a zero-knowledge paste bin |
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* |
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* @link https://github.com/PrivateBin/PrivateBin |
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* @copyright 2012 Sébastien SAUVAGE (sebsauvage.net) |
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* @license https://www.opensource.org/licenses/zlib-license.php The zlib/libpng License |
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* @version 1.1.1 |
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*/ |
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namespace PrivateBin; |
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/** |
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* I18n |
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* |
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* provides internationalization tools like translation, browser language detection, etc. |
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*/ |
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class I18n |
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{ |
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/** |
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* language |
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* |
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* @access protected |
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* @static |
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* @var string |
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*/ |
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protected static $_language = 'en'; |
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/** |
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* language fallback |
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* |
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* @access protected |
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* @static |
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* @var string |
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*/ |
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protected static $_languageFallback = 'en'; |
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/** |
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* language labels |
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* |
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* @access protected |
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* @static |
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* @var array |
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*/ |
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protected static $_languageLabels = array(); |
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/** |
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* available languages |
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* |
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* @access protected |
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* @static |
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* @var array |
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*/ |
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protected static $_availableLanguages = array(); |
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/** |
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* path to language files |
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* |
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* @access protected |
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* @static |
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* @var string |
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*/ |
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protected static $_path = ''; |
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/** |
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* translation cache |
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* |
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* @access protected |
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* @static |
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* @var array |
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*/ |
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protected static $_translations = array(); |
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/** |
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* translate a string, alias for translate() |
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* |
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* @access public |
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* @static |
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* @param string $messageId |
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* @param mixed $args one or multiple parameters injected into placeholders |
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* @return string |
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*/ |
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public static function _($messageId) |
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{ |
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return forward_static_call_array('self::translate', func_get_args()); |
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} |
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/** |
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* translate a string |
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* |
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* @access public |
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* @static |
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* @param string $messageId |
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* @param mixed $args one or multiple parameters injected into placeholders |
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* @return string |
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*/ |
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public static function translate($messageId) |
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{ |
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if (empty($messageId)) { |
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return $messageId; |
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} |
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if (count(self::$_translations) === 0) { |
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self::loadTranslations(); |
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} |
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$messages = $messageId; |
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if (is_array($messageId)) { |
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$messageId = count($messageId) > 1 ? $messageId[1] : $messageId[0]; |
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} |
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if (!array_key_exists($messageId, self::$_translations)) { |
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self::$_translations[$messageId] = $messages; |
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} |
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$args = func_get_args(); |
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if (is_array(self::$_translations[$messageId])) { |
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$number = (int) $args[1]; |
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$key = self::_getPluralForm($number); |
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$max = count(self::$_translations[$messageId]) - 1; |
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if ($key > $max) { |
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$key = $max; |
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} |
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$args[0] = self::$_translations[$messageId][$key]; |
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$args[1] = $number; |
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} else { |
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$args[0] = self::$_translations[$messageId]; |
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} |
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return call_user_func_array('sprintf', $args); |
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} |
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/** |
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* loads translations |
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* |
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* From: https://stackoverflow.com/questions/3770513/detect-browser-language-in-php#3771447 |
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* |
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* @access public |
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* @static |
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*/ |
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public static function loadTranslations() |
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{ |
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$availableLanguages = self::getAvailableLanguages(); |
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// check if the lang cookie was set and that language exists |
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if ( |
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array_key_exists('lang', $_COOKIE) && |
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($key = array_search($_COOKIE['lang'], $availableLanguages)) !== false |
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) { |
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$match = $availableLanguages[$key]; |
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} |
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// find a translation file matching the browsers language preferences |
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else { |
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$match = self::_getMatchingLanguage( |
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self::getBrowserLanguages(), $availableLanguages |
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); |
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} |
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// load translations |
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self::$_language = $match; |
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self::$_translations = ($match == 'en') ? array() : json_decode( |
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file_get_contents(self::_getPath($match . '.json')), |
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true |
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); |
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} |
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/** |
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* get list of available translations based on files found |
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* |
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* @access public |
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* @static |
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* @return array |
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*/ |
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public static function getAvailableLanguages() |
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{ |
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if (count(self::$_availableLanguages) == 0) { |
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$i18n = dir(self::_getPath()); |
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while (false !== ($file = $i18n->read())) { |
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if (preg_match('/^([a-z]{2}).json$/', $file, $match) === 1) { |
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self::$_availableLanguages[] = $match[1]; |
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} |
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} |
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self::$_availableLanguages[] = 'en'; |
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} |
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return self::$_availableLanguages; |
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} |
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/** |
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* detect the clients supported languages and return them ordered by preference |
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* |
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* From: https://stackoverflow.com/questions/3770513/detect-browser-language-in-php#3771447 |
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* |
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* @access public |
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* @static |
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* @return array |
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*/ |
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public static function getBrowserLanguages() |
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{ |
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$languages = array(); |
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if (array_key_exists('HTTP_ACCEPT_LANGUAGE', $_SERVER)) { |
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$languageRanges = explode(',', trim($_SERVER['HTTP_ACCEPT_LANGUAGE'])); |
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foreach ($languageRanges as $languageRange) { |
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if (preg_match( |
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'/(\*|[a-zA-Z0-9]{1,8}(?:-[a-zA-Z0-9]{1,8})*)(?:\s*;\s*q\s*=\s*(0(?:\.\d{0,3})|1(?:\.0{0,3})))?/', |
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trim($languageRange), $match |
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)) { |
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if (!isset($match[2])) { |
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$match[2] = '1.0'; |
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} else { |
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$match[2] = (string) floatval($match[2]); |
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} |
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if (!isset($languages[$match[2]])) { |
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$languages[$match[2]] = array(); |
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} |
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$languages[$match[2]][] = strtolower($match[1]); |
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} |
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} |
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krsort($languages); |
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} |
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return $languages; |
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} |
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/** |
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* get currently loaded language |
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* |
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* @access public |
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* @static |
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* @return string |
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*/ |
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public static function getLanguage() |
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{ |
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return self::$_language; |
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} |
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/** |
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* get list of language labels |
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* |
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* Only for given language codes, otherwise all labels. |
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* |
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* @access public |
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* @static |
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* @param array $languages |
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* @return array |
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*/ |
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public static function getLanguageLabels($languages = array()) |
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{ |
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$file = self::_getPath('languages.json'); |
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if (count(self::$_languageLabels) == 0 && is_readable($file)) { |
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self::$_languageLabels = json_decode(file_get_contents($file), true); |
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} |
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if (count($languages) == 0) { |
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return self::$_languageLabels; |
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} |
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return array_intersect_key(self::$_languageLabels, array_flip($languages)); |
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} |
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/** |
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* set the default language |
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* |
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* @access public |
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* @static |
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* @param string $lang |
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*/ |
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public static function setLanguageFallback($lang) |
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{ |
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if (in_array($lang, self::getAvailableLanguages())) { |
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self::$_languageFallback = $lang; |
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} |
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} |
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/** |
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* get language file path |
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* |
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* @access protected |
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* @static |
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* @param string $file |
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* @return string |
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*/ |
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protected static function _getPath($file = '') |
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{ |
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if (strlen(self::$_path) == 0) { |
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self::$_path = PUBLIC_PATH . DIRECTORY_SEPARATOR . 'i18n'; |
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} |
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return self::$_path . (strlen($file) ? DIRECTORY_SEPARATOR . $file : ''); |
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} |
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/** |
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* determines the plural form to use based on current language and given number |
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* |
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* From: http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html |
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* |
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* @access protected |
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* @static |
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* @param int $n |
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* @return int |
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*/ |
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protected static function _getPluralForm($n) |
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{ |
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switch (self::$_language) { |
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case 'fr': |
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case 'oc': |
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case 'zh': |
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return $n > 1 ? 1 : 0; |
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case 'pl': |
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return $n == 1 ? 0 : ($n % 10 >= 2 && $n % 10 <= 4 && ($n % 100 < 10 || $n % 100 >= 20) ? 1 : 2); |
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case 'ru': |
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return $n % 10 == 1 && $n % 100 != 11 ? 0 : ($n % 10 >= 2 && $n % 10 <= 4 && ($n % 100 < 10 || $n % 100 >= 20) ? 1 : 2); |
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case 'sl': |
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return $n % 100 == 1 ? 1 : ($n % 100 == 2 ? 2 : ($n % 100 == 3 || $n % 100 == 4 ? 3 : 0)); |
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// de, en, es, it, no, pt |
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default: |
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return $n != 1 ? 1 : 0; |
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} |
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} |
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/** |
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* compares two language preference arrays and returns the preferred match |
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* |
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* From: https://stackoverflow.com/questions/3770513/detect-browser-language-in-php#3771447 |
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* |
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* @access protected |
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* @static |
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* @param array $acceptedLanguages |
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* @param array $availableLanguages |
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* @return string |
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*/ |
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protected static function _getMatchingLanguage($acceptedLanguages, $availableLanguages) |
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{ |
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$matches = array(); |
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$any = false; |
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foreach ($acceptedLanguages as $acceptedQuality => $acceptedValues) { |
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$acceptedQuality = floatval($acceptedQuality); |
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if ($acceptedQuality === 0.0) { |
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continue; |
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} |
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foreach ($availableLanguages as $availableValue) { |
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$availableQuality = 1.0; |
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foreach ($acceptedValues as $acceptedValue) { |
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if ($acceptedValue === '*') { |
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$any = true; |
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} |
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$matchingGrade = self::_matchLanguage($acceptedValue, $availableValue); |
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if ($matchingGrade > 0) { |
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$q = (string) ($acceptedQuality * $availableQuality * $matchingGrade); |
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8 |
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if (!isset($matches[$q])) { |
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8 |
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$matches[$q] = array(); |
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} |
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8 |
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if (!in_array($availableValue, $matches[$q])) { |
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$matches[$q][] = $availableValue; |
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} |
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} |
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} |
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} |
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} |
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if (count($matches) === 0 && $any) { |
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1 |
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if (count($availableLanguages) > 0) { |
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1 |
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$matches['1.0'] = $availableLanguages; |
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} |
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} |
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68 |
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if (count($matches) === 0) { |
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return self::$_languageFallback; |
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} |
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9 |
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krsort($matches); |
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9 |
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$topmatches = current($matches); |
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9 |
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return current($topmatches); |
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} |
365
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|
366
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/** |
367
|
|
|
* compare two language IDs and return the degree they match |
368
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* |
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* From: https://stackoverflow.com/questions/3770513/detect-browser-language-in-php#3771447 |
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* |
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* @access protected |
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* @static |
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* @param string $a |
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* @param string $b |
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* @return float |
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*/ |
377
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11 |
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protected static function _matchLanguage($a, $b) |
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{ |
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11 |
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$a = explode('-', $a); |
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|
11 |
|
$b = explode('-', $b); |
381
|
11 |
|
for ($i = 0, $n = min(count($a), count($b)); $i < $n; ++$i) { |
382
|
11 |
|
if ($a[$i] !== $b[$i]) { |
383
|
11 |
|
break; |
384
|
|
|
} |
385
|
|
|
} |
386
|
11 |
|
return $i === 0 ? 0 : (float) $i / count($a); |
387
|
|
|
} |
388
|
|
|
} |
389
|
|
|
|