<?php
/**
 * Native Lanauge Support: Translator Service GoogleAPIs
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBNLS_Translator_Service');

/**
 * Native Lanauge Support: Translator Service GoogleAPIs
 *
 *
 * Utilize Google API Cloud Translation
 * See https://cloud.google.com/translate/docs/basic/translate-text-basic
 *
 * @version 0.2.0
 * @package WB
 * @subpackage nls
 */
class WBNLS_Translator_Service_GoogleAPIs extends WBNLS_Translator_Service
{
    /**
     * @var WBRest_Client
     */
    private $client;

    /**
     * Construtor
     *
     * @param array configation parameters
     */
    public function __construct($parameter = array())
    {
        /** @var WBRest_Client */
        $this->client   =   WBClass::create('WBRest_Client');
        $this->client->configure(array(
                                        'server'        =>  'translation.googleapis.com',
                                        'pathprefix'    =>  'language/translate/v2'
                                    ));

        $this->client->setHeader('Accept', 'application/json');
        $this->client->setHeader('Content-Type', 'application/json');
    }

    /**
     * 2nd Construtor
     *
     * @see configure()
     */
    protected function init()
    {
        $this->client->setHeader('X-goog-api-key', $this->config['apikey']);
        $this->client->setHeader('Authorization', '$(gcloud auth print-access-token)');
    }

    /**
     * Translate List of String
     *
     * @param array list of associative arrays
     * @param string key in associative array
     * @return bool true on success
     */
    public function translateList(&$list, $key = 'msg')
    {
        $body   =   array(
                            'source'    =>  substr($this->getSourceLang(), 0, 2),
                            'target'    =>  substr($this->getTargetLang(), 0, 2),
                            'format'    =>  'text',
                            'q'         =>  array()
                        );

        foreach ($list as $l) {
            $body['q'][]    =   $l[$key];
        }

        if(!$this->client->post('/', $body)) {
            return false;
        }

        $res    =   $this->client->getRespone();
        $trans  =   $res->getContent();
        if (empty($trans['data']) || empty($trans['data']['translations'])) {
            return false;
        }
        $trans  =   $trans['data']['translations'];
        if (count($list) != count($trans)) {
            return false;
        }
        foreach ($list as $i => &$l) {
            $l[$key . '_trans']   =   $trans[$i]['translatedText'];
        }
        return true;
    }
}