class.ilCachedLanguage.php

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<?php
require_once('./Services/GlobalCache/classes/class.ilGlobalCache.php');
 
class ilCachedLanguage {
 
        protected $global_cache;
        protected $loaded = false;
        protected $language_key = 'en';
        protected $translations = array();
        protected static $instances = array();
 
 
        protected function __construct($language_key) {
                $this->setLanguageKey($language_key);
                $this->global_cache = ilGlobalCache::getInstance(ilGlobalCache::COMP_CLNG);
                $this->readFromCache();
                if (! $this->getLoaded()) {
                        $this->readFromDB();
                        $this->writeToCache();
                        $this->setLoaded(true);
                }
        }
 
 
        public function isActive() {
                return $this->global_cache->isActive();
        }
 
 
        protected function readFromCache() {
                if ($this->global_cache->isActive()) {
                        $translations = $this->global_cache->get('translations_' . $this->getLanguageKey());
                        if (is_array($translations)) {
                                $this->setTranslations($translations);
                                $this->setLoaded(true);
                        }
                }
        }
 
 
        public function writeToCache() {
                if ($this->global_cache->isActive()) {
                        $this->global_cache->set('translations_' . $this->getLanguageKey(), $this->getTranslations());
                }
        }
 
 
        protected function readFromDB() {
                global $ilDB;
                $q = 'SELECT module, lang_array FROM lng_modules WHERE lang_key = %s';
                $res = $ilDB->queryF($q, array( 'text' ), array( $this->getLanguageKey() ));
                $translations = array();
                while ($set = $ilDB->fetchObject($res)) {
                        $lang_array = unserialize($set->lang_array);
                        if (is_array($lang_array)) {
                                $translations[$set->module] = $lang_array;
                        }
                }
                $this->setTranslations($translations);
        }
 
 
        public static function getInstance($key) {
                if (! isset(self::$instances[$key])) {
                        self::$instances[$key] = new self($key);
                }
 
                return self::$instances[$key];
        }
 
 
        public function flush() {
                if ($this->global_cache->isActive()) {
                        $this->global_cache->flush();
                }
                $this->readFromDB();
                $this->writeToCache();
        }
 
 
        public function setLanguageKey($language_key) {
                $this->language_key = $language_key;
        }
 
 
        public function getLanguageKey() {
                return $this->language_key;
        }
 
 
        public function setLoaded($loaded) {
                $this->loaded = $loaded;
        }
 
 
        public function getLoaded() {
                return $this->loaded;
        }
 
 
        public function setTranslations($translations) {
                $this->translations = $translations;
        }
 
 
        public function getTranslations() {
                return $this->translations;
        }
}
 
?>