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  • l10n.php 7.00 KiB
    <?php
    /**
     * ownCloud
     *
     * @author Jakob Sack
     * @copyright 2010 Frank Karlitschek karlitschek@kde.org
     *
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
     * License as published by the Free Software Foundation; either
     * version 3 of the License, or any later version.
     *
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
     *
     * You should have received a copy of the GNU Affero General Public
     * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
     *
     */
    
    /**
     * This class is for i18n and l10n
     */
    class OC_L10N{
    	/**
    	 * cache
    	 */
    	protected static $cache = array();
    	
    	/**
    	 * The best language
    	 */
    	protected static $language = '';
    	
    	/**
    	 * Translations
    	 */
    	private $translations = array();
    	
    	/**
    	 * Localization
    	 */
    	private $localizations = array(
    		'date' => 'd.m.Y',
    		'datetime' => 'd.m.Y H:i:s',
    		'time' => 'H:i:s' );
    	
    	/**
    	 * @brief The constructor
    	 * @param $app the app requesting l10n
    	 * @param $lang default: null Language
    	 * @returns OC_L10N-Object
    	 *
    	 * If language is not set, the constructor tries to find the right
    	 * language.
    	 */
    	public function __construct( $app, $lang = null ){
    		global $SERVERROOT;
    		// Find the right language
    		if( is_null( $lang )){
    			$lang = self::findLanguage( $app );
    		}
    
    		// Use cache if possible
    		if(array_key_exists($app.'::'.$lang, self::$cache )){
    
    			$this->translations = self::$cache[$app.'::'.$lang]['t'];
    			$this->localizations = self::$cache[$app.'::'.$lang]['l'];
    		}
    		else{
    			$i18ndir = self::findI18nDir( $app );
    			// Localization is in /l10n, Texts are in $i18ndir
    			// (Just no need to define date/time format etc. twice)
    			if( file_exists( $i18ndir.$lang.'.php' )){
    				// Include the file, save the data from $CONFIG
    				include( $i18ndir.$lang.'.php' );
    				if( isset( $TRANSLATIONS ) && is_array( $TRANSLATIONS )){
    					$this->translations = $TRANSLATIONS;
    				}
    			}
    
    			if( file_exists( $SERVERROOT.'/core/l10n/l10n-'.$lang.'.php' )){
    				// Include the file, save the data from $CONFIG
    				include( $SERVERROOT.'/core/l10n/l10n-'.$lang.'.php' );
    				if( isset( $LOCALIZATIONS ) && is_array( $LOCALIZATIONS )){
    					$this->localizations = array_merge( $this->localizations, $LOCALIZATIONS );
    				}
    			}
    
    			self::$cache[$app.'::'.$lang]['t'] = $this->translations;
    			self::$cache[$app.'::'.$lang]['l'] = $this->localizations;
    		}
    	}
    
    	/**
    	 * @brief Translating
    	 * @param $text The text we need a translation for
    	 * @returns Translation or the same text
    	 *
    	 * Returns the translation. If no translation is found, $text will be
    	 * returned.
    	 */
    	public function t($text){
    		if(array_key_exists($text, $this->translations)){
    			return $this->translations[$text];
    		}
    		return $text;
    	}
    
    	/**
    	 * @brief getTranslations
    	 * @returns Fetch all translations
    	 *
    	 * Returns an associative array with all translations
    	 */
    	public function getTranslations(){
    		return $this->translations;
    	}
    
    	/**
    	 * @brief Localization
    	 * @param $type Type of localization
    	 * @param $params parameters for this localization
    	 * @returns String or false
    	 *
    	 * Returns the localized data.
    	 * 
    	 * Implemented types:
    	 *  - date
    	 *    - Creates a date
    	 *    - l10n-field: date
    	 *    - params: timestamp (int/string)
    	 *  - datetime
    	 *    - Creates date and time
    	 *    - l10n-field: datetime
    	 *    - params: timestamp (int/string)
    	 *  - time
    	 *    - Creates a time
    	 *    - l10n-field: time
    	 *    - params: timestamp (int/string)
    	 */
    	public function l($type, $data){
    		switch($type){
    			// If you add something don't forget to add it to $localizations
    			// at the top of the page
    			case 'date':
    				if( is_string( $data )) $data = strtotime( $data );
    				return date( $this->localizations['date'], $data );
    				break;
    			case 'datetime':
    				if( is_string( $data )) $data = strtotime( $data );
    				return date( $this->localizations['datetime'], $data );
    				break;
    			case 'time':
    				if( is_string( $data )) $data = strtotime( $data );
    				return date( $this->localizations['time'], $data );
    				break;
    			default:
    				return false;
    		}
    	}
    
    	/**
    	 * @brief Choose a language
    	 * @param $texts Associative Array with possible strings
    	 * @returns String
    	 *
    	 * $text is an array 'de' => 'hallo welt', 'en' => 'hello world', ...
    	 *
    	 * This function is useful to avoid loading thousands of files if only one
    	 * simple string is needed, for example in appinfo.php
    	 */
    	public static function selectLanguage( $text ){
    		$lang = self::findLanguage( array_keys( $text ));
    		return $text[$lang];
    	}
    
    	/**
    	 * @brief find the best language
    	 * @param $app Array or string, details below
    	 * @returns language
    	 *
    	 * If $app is an array, ownCloud assumes that these are the available
    	 * languages. Otherwise ownCloud tries to find the files in the l10n 
    	 * folder.
    	 *
    	 * If nothing works it returns 'en'
    	 */
    	public static function findLanguage( $app = null ){
    		if( !is_array( $app) && self::$language != '' ){
    			return self::$language;
    		}
    
    		$available = array();
    		if( is_array( $app )){
    			$available = $app;
    		}
    		else{
    			$available=self::findAvailableLanguages( $app );
    		}
    		if( OC_User::getUser() && OC_Preferences::getValue( OC_User::getUser(), 'core', 'lang' )){
    			$lang = OC_Preferences::getValue( OC_User::getUser(), 'core', 'lang' );
    			self::$language = $lang;
    			if( array_search( $lang, $available ) !== false ){
    				return $lang;
    			}
    		}
    
    		if( isset( $_SERVER['HTTP_ACCEPT_LANGUAGE'] )){
    			$accepted_languages = preg_split( '/,\s*/', $_SERVER['HTTP_ACCEPT_LANGUAGE'] );
    			foreach( $accepted_languages as $i ){
    				$temp = explode( ';', $i );
    				if( array_search( $temp[0], $available ) !== false ){
    					return $temp[0];
    				}
    			}
    		}
    
    		// Last try: English
    		return 'en';
    	}
    
    	/**
    	 * @brief find the l10n directory
    	 * @param $app App that needs to be translated
    	 * @returns directory
    	 */
    	protected static function findI18nDir( $app ){
    		global $SERVERROOT;
    		
    		// find the i18n dir
    		$i18ndir = $SERVERROOT.'/core/l10n/';
    		if( $app != '' ){
    			// Check if the app is in the app folder
    			if( file_exists( $SERVERROOT.'/apps/'.$app.'/l10n/' )){
    				$i18ndir = $SERVERROOT.'/apps/'.$app.'/l10n/';
    			}
    			else{
    				$i18ndir = $SERVERROOT.'/'.$app.'/l10n/';
    			}
    		}
    		return $i18ndir;
    	}
    
    	/**
    	 * @brief find all available languages for an app
    	 * @param $app App that needs to be translated
    	 * @returns array an array of available languages
    	 */
    	public static function findAvailableLanguages( $app=null ){
    		$available=array('en');//english is always available
    		$dir = self::findI18nDir( $app );
    		if( file_exists($dir)){
    			$dh = opendir($dir);
    			while(( $file = readdir( $dh )) !== false ){
    				if( substr( $file, -4, 4 ) == '.php' and strlen($file)==6 ){
    					$i = substr( $file, 0, -4 );
    					if( $i != '' ){
    						$available[] = $i;
    					}
    				}
    			}
    			closedir($dh);
    		}
    		return $available;
    	}
    }