102 lines
2.7 KiB
PHP
102 lines
2.7 KiB
PHP
<?php
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/*
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* @package AJAX_Chat
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* @author Sebastian Tschan
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* @copyright (c) Sebastian Tschan
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* @license GNU Affero General Public License
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* @link https://blueimp.net/ajax/
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*/
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class AJAXChatLanguage {
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var $_regExpAcceptLangCode;
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var $_availableLangCodes;
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var $_defaultLangCode;
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var $_strictMode;
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var $_langCode;
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function __construct($availableLangCodes, $defaultLangCode, $langCode=null, $strictMode=false) {
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$this->_regExpAcceptLangCode = '/^([a-z]{1,8}(?:-[a-z]{1,8})*)(?:;\s*q=(0(?:\.[0-9]{1,3})?|1(?:\.0{1,3})?))?$/i';
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$this->_availableLangCodes = $availableLangCodes;
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$this->_defaultLangCode = $defaultLangCode;
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if($langCode && in_array($langCode, $availableLangCodes)) {
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$this->_langCode = $langCode;
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}
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$this->_strictMode = $strictMode;
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}
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// Method to detect the language code from the HTTP_ACCEPT_LANGUAGE header:
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function detectLangCode() {
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// If HTTP_ACCEPT_LANGUAGE is empty use defaultLangCode:
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if(empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
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$this->_langCode = $this->_defaultLangCode;
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return;
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}
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// Split up the HTTP_ACCEPT_LANGUAGE header:
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$acceptedLanguages = preg_split('/,\s*/', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
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$currentLangCode = $this->_defaultLangCode;
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$currentLangQuality = 0.0;
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foreach($acceptedLanguages as $acceptedLanguage) {
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// Parse the language string:
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$match = preg_match($this->_regExpAcceptLangCode, $acceptedLanguage, $matches);
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// Check if the syntax is valid:
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if(!$match) {
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continue;
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}
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// Get and split the language code:
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$langCodeParts = explode ('-', $matches[1]);
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// Get the language quality given as float value:
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if(isset($matches[2])) {
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$langQuality = (float)$matches[2];
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} else {
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// Missing language quality value is maximum quality:
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$langQuality = 1.0;
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}
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// Go through it until the language code is empty:
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while(count($langCodeParts)) {
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// Join the current langCodeParts:
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$langCode = strtolower(join('-', $langCodeParts));
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// Check if the langCode is in the available list:
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if(in_array($langCode, $this->_availableLangCodes)) {
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// Check the quality setting:
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if ($langQuality > $currentLangQuality) {
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$currentLangCode = $langCode;
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$currentLangQuality = $langQuality;
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break;
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}
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}
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// If strict mode is set, don't minimalize the language code:
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if($this->_strictMode) {
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break;
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}
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// else chop off the right part:
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array_pop($langCodeParts);
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}
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}
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$this->_langCode = $currentLangCode;
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}
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function getLangCode() {
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if(!$this->_langCode) {
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$this->detectLangCode();
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}
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return $this->_langCode;
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}
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function setLangCode($langCode) {
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$this->_langCode = $langCode;
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}
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function getLangCodes() {
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return $this->_availableLangCodes;
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}
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}
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?>
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