/**
 * This is experimental translate adapter using Google Translate services
 * Tries to translate from language specified in $options['source'] to language given in $locale
 * and caches the result *
 * @category   Zend
 * @package    Zend_Translate
 * @author     Michal "Techi" Vrchota <[email protected]>
 * @license    http://www.gnu.org/licenses/gpl-3.0.txt GNU General Public License v 3.0 */
 
/** Zend_Locale */
require_once 'Zend/Locale.php';
 /** Zend_Translate_Adapter */
require_once 'Zend/Translate/Adapter.php';
 
 
class Techi_Translate_Adapter_Google extends Zend_Translate_Adapter{
        /**
     * Generates the adapter
     *
     * @param  array               $data     Translation data     * @param  string|Zend_Locale  $locale   OPTIONAL Locale/Language to set, identical with locale identifier,
     *                                       see Zend_Locale for more information
     * @param  array               $options  OPTIONAL Options to set
     */
        public function __construct($data, $locale = null, array $options = array())        {
                parent::__construct($data, $locale, $options);
        }
 
        /**         * Translate message
         *
         * @param string $messageId
         * @param Zend_Locale|string $locale
         * @return string         */
 
        public function translate($messageId, $locale = null)
        {
                if ($locale === null) {                        $locale = $this->_options['locale'];
                }
                if (!Zend_Locale::isLocale($locale, true)) {
                        if (!Zend_Locale::isLocale($locale, false)) {
                                // language does not exist, return original string                                return $messageId;
                        }
                        $locale = new Zend_Locale($locale);
                }
                 $source = $this->_options['source'];
 
                if ($source == $locale)
                {
                        return $messageId;                }
 
 
                $frontendOptions = array(
                'lifetime' => 9999999999, // infinity?                'automatic_serialization' => true
                );
 
                $backendOptions = array(
                'cache_dir' => './tmp/' // Directory where to put the cache files                );
 
                // getting a Zend_Cache_Core object
                $cache = Zend_Cache::factory('Core',
                'File',                $frontendOptions,
                $backendOptions);
 
                $langpair = $source.'|'.$locale;
                 $cacheId = 'translation_'.str_replace('|','_',$langpair).'_'.MD5($messageId);
 
                if(!$result = $cache->load($cacheId)) {
 
 
                        $client = new Zend_Http_Client('http://ajax.googleapis.com/ajax/services/language/translate', array(
                        'maxredirects' => 0,
                        'timeout'      => 30));
                         $client->setParameterGet(array(
                        'v' => '1.0',
                        'q' => $messageId,
                        'langpair' => $langpair
                        )); 
                        $response = $client->request();
 
 
                         $data = $response->getBody();
 
                        $server_result = json_decode($data);
 
                        $status = $server_result->responseStatus; // should be 200                        $details = $server_result->responseDetails;
 
                        $result = $server_result->responseData->translatedText;
 
                         $cache->save($result, $cacheId, array('translation'));
 
                }
 
                return $result; 
        }
 
        /**
     * Load translation data     *
     * @param  string|array  $data
     * @param  string        $locale  Locale/Language to add data for, identical with locale identifier,
     *                                see Zend_Locale for more information
     * @param  array         $options OPTIONAL Options to use     */
        protected function _loadTranslationData($data, $locale, array $options = array())
        {
                $options = $options + $this->_options;
                if (($options['clear'] == true) ||  !isset($this->_translate[$locale])) {                        $this->_translate[$locale] = array();
                }
 
 
                $this->_translate[$locale] = $data + $this->_translate[$locale] + array($locale);        }
 
    /**
     * returns the adapters name
     *     
     * @return string
     */
     public function toString()
     {
             return "Google";        
     }
}