1 files changed, 102 insertions, 0 deletions
diff --git a/library/ajaxchat/chat/lib/class/AJAXChatLanguage.php b/library/ajaxchat/chat/lib/class/AJAXChatLanguage.php
new file mode 100644
index 000000000..b19724710
--- /dev/null
+++ b/library/ajaxchat/chat/lib/class/AJAXChatLanguage.php
@@ -0,0 +1,102 @@
+<?php
+/*
+ * @package AJAX_Chat
+ * @author Sebastian Tschan
+ * @copyright (c) Sebastian Tschan
+ * @license Modified MIT License
+ * @link https://blueimp.net/ajax/
+ */
+
+class AJAXChatLanguage {
+
+	var $_regExpAcceptLangCode;
+	var $_availableLangCodes;
+	var $_defaultLangCode;
+	var $_strictMode;
+	var $_langCode;
+
+	function __construct($availableLangCodes, $defaultLangCode, $langCode=null, $strictMode=false) {
+		$this->_regExpAcceptLangCode = '/^([a-z]{1,8}(?:-[a-z]{1,8})*)(?:;\s*q=(0(?:\.[0-9]{1,3})?|1(?:\.0{1,3})?))?$/i';
+		$this->_availableLangCodes = $availableLangCodes;
+		$this->_defaultLangCode = $defaultLangCode;
+		if($langCode && in_array($langCode, $availableLangCodes)) {
+			$this->_langCode = $langCode;
+		}
+		$this->_strictMode = $strictMode;
+	}
+	
+	// Method to detect the language code from the HTTP_ACCEPT_LANGUAGE header:
+	function detectLangCode() {
+		// If HTTP_ACCEPT_LANGUAGE is empty use defaultLangCode:
+		if(empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
+			$this->_langCode = $this->_defaultLangCode;
+			return;
+		}
+
+		// Split up the HTTP_ACCEPT_LANGUAGE header:
+		$acceptedLanguages = preg_split('/,\s*/', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
+		
+		$currentLangCode = $this->_defaultLangCode;
+		$currentLangQuality = 0.0;
+		
+		foreach($acceptedLanguages as $acceptedLanguage) {
+			// Parse the language string:
+			$match = preg_match($this->_regExpAcceptLangCode, $acceptedLanguage, $matches);
+			// Check if the syntax is valid:
+			if(!$match) {
+				continue;
+			}
+			
+			// Get and split the language code:	
+			$langCodeParts = explode ('-', $matches[1]);
+			
+			// Get the language quality given as float value:
+			if(isset($matches[2])) {
+				$langQuality = (float)$matches[2];
+			} else {
+				// Missing language quality value is maximum quality:
+				$langQuality = 1.0;
+			}
+
+			//  Go through it until the language code is empty:
+			while(count($langCodeParts)) {
+				// Join the current langCodeParts:
+				$langCode = strtolower(join('-', $langCodeParts));
+				// Check if the langCode is in the available list:
+				if(in_array($langCode, $this->_availableLangCodes)) {
+					// Check the quality setting:
+					if ($langQuality > $currentLangQuality) {
+						$currentLangCode = $langCode;
+						$currentLangQuality = $langQuality;
+						break;
+					}
+				}
+				// If strict mode is set, don't minimalize the language code:
+				if($this->_strictMode) {
+					break;
+				}
+				// else chop off the right part:
+				array_pop($langCodeParts);
+			}
+		}
+		
+		$this->_langCode = $currentLangCode;
+	}
+
+	function getLangCode() {
+		if(!$this->_langCode) {
+			$this->detectLangCode();
+		}
+		return $this->_langCode;
+	}
+	
+	function setLangCode($langCode) {
+		$this->_langCode = $langCode;
+	}
+
+	function getLangCodes() {
+		return $this->_availableLangCodes;
+	}
+	
+}
+?>
+\ No newline at end of file