translater/inc/lib.translater.microsoft.php

<?php
# -- BEGIN LICENSE BLOCK ----------------------------------
#
# This file is part of translater, a plugin for Dotclear 2.
# 
# Copyright (c) 2009-2013 Jean-Christian Denis and contributors
# contact@jcdenis.fr
# 
# Licensed under the GPL version 2.0 license.
# A copy of this license is available in LICENSE file or at
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK ------------------------------------

if (!defined('DC_CONTEXT_ADMIN')){return;}

/**
 * Microsoft proposal tool.
 *
 * This uses Microsoft API to translate strings
 */
class microsoftProposalTool extends translaterProposalTool
{
	private $client = null; //ex: b6057813-234b-4154-b324-6342c27f608f
	private $secret = null; //ex: DsdDScn/+xdSFF1GDxdx1wbkKPphAfAVSH5VXDBVDI=
	
	protected function setup()
	{
		$this->setActive(false);
		$this->client = $this->core->blog->settings->translater->translater_microsoft_proposal_client;
		$this->secret = $this->core->blog->settings->translater->translater_microsoft_proposal_secret;
		
		$this->setName(__('Bing'));
		$this->setDesc(__('Microsoft Bing translation tool'));
		$this->setActive(!empty($this->client) && !empty($this->secret));
	}
	
	public function form()
	{
		return
		'<p><label class="classic" for="translater_microsoft_proposal_client">'.
		__('Application client ID').'<br />'.
		form::field('translater_microsoft_proposal_client',65,255,$this->client).
		'</label></p>'.
		'<p><label class="classic" for="translater_microsoft_proposal_secret">'.
		__('Application client Secret').'<br />'.
		form::field('translater_microsoft_proposal_secret',65,255,$this->secret).
		'</label></p>'.
		'<p>'.__('You must have:').'</p>'.
		'<ul>'.
		'<li><a href="https://datamarket.azure.com/account">'.__('A Microsoft Windows Azure account').'</a></li>'.
		'<li><a href="https://datamarket.azure.com/dataset/bing/microsofttranslator">'.__('A valid subscription to Microsoft Translator').'</a></li>'.
		'<li><a href="https://datamarket.azure.com/developer/applications/">'.__('And register an application').'</a></li>'.
		'</ul>';
	}
	
	public function save()
	{
		$client = empty($_POST['translater_microsoft_proposal_client']) ? 
			'' : $_POST['translater_microsoft_proposal_client'];
		$secret = empty($_POST['translater_microsoft_proposal_secret']) ? 
			'' : $_POST['translater_microsoft_proposal_secret'];
		
		$this->core->blog->settings->translater->put('translater_microsoft_proposal_client',$client,'string','',true,true);
		$this->core->blog->settings->translater->put('translater_microsoft_proposal_secret',$secret,'string','',true,true);
	}
	
	public function translate($str,$from,$to)
	{
		try {
			return $this->doYourFuckingJob($this->client,$this->secret,$str,$from,$to);
		}
		catch (Exception $e) {}
		return '';
	}
	
	//
	// Microsoft fucking oAuth
	//
	
	private function doYourFuckingJob($client,$secret,$str,$from,$to)
	{
		try {
		    //Client ID of the application.
		    $clientID       = $client;
		    //Client Secret key of the application.
		    $clientSecret = $secret;
		    //OAuth Url.
		    $authUrl      = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13/";
		    //Application Scope Url
		    $scopeUrl     = "http://api.microsofttranslator.com";
		    //Application grant type
		    $grantType    = "client_credentials";
			
		    //Get the Access token.
		    $accessToken  = $this->getTokens($grantType, $scopeUrl, $clientID, $clientSecret, $authUrl);
		    //Create the authorization Header string.
		    $authHeader = "Authorization: Bearer ". $accessToken;
			
		    //Set the params.//
		    $fromLanguage = $from;
		    $toLanguage   = $to;
		    $inputStr     = $str;
		    $contentType  = 'text/plain';
		    $category     = 'general';
		    
		    $params = "text=".urlencode($inputStr)."&to=".$toLanguage."&from=".$fromLanguage;
		    $translateUrl = "http://api.microsofttranslator.com/v2/Http.svc/Translate?$params";
		    
		    //Get the curlResponse.
		    $curlResponse = $this->curlRequest($translateUrl, $authHeader);
		    
		    //Interprets a string of XML into an object.
		    $xmlObj = simplexml_load_string($curlResponse);
		    foreach((array)$xmlObj[0] as $val){
			   $translatedStr = $val;
		    }
		    
		    return (string) $translatedStr;
		    /*
		    echo "<table border=2px>";
		    echo "<tr>";
		    echo "<td><b>From $fromLanguage</b></td><td><b>To $toLanguage</b></td>";
		    echo "</tr>";
		    echo "<tr><td>".$inputStr."</td><td>".$translatedStr."</td></tr>";
		    echo "</table>";
		    */
		} catch (Exception $e) {
		    throw $e;
		}
	}
	
    /*
     * Get the access token.
     *
     * @param string $grantType    Grant type.
     * @param string $scopeUrl     Application Scope URL.
     * @param string $clientID     Application client ID.
     * @param string $clientSecret Application client ID.
     * @param string $authUrl      Oauth Url.
     *
     * @return string.
     */
	private function getTokens($grantType, $scopeUrl, $clientID, $clientSecret, $authUrl)
	{
        try {
            //Initialize the Curl Session.
            $ch = curl_init();
            //Create the request Array.
            $paramArr = array (
                 'grant_type'    => $grantType,
                 'scope'         => $scopeUrl,
                 'client_id'     => $clientID,
                 'client_secret' => $clientSecret
            );
            //Create an Http Query.//
            $paramArr = http_build_query($paramArr);
            //Set the Curl URL.
            curl_setopt($ch, CURLOPT_URL, $authUrl);
            //Set HTTP POST Request.
            curl_setopt($ch, CURLOPT_POST, TRUE);
            //Set data to POST in HTTP "POST" Operation.
            curl_setopt($ch, CURLOPT_POSTFIELDS, $paramArr);
            //CURLOPT_RETURNTRANSFER- TRUE to return the transfer as a string of the return value of curl_exec().
            curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
            //CURLOPT_SSL_VERIFYPEER- Set FALSE to stop cURL from verifying the peer's certificate.
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            //Execute the  cURL session.
            $strResponse = curl_exec($ch);
            //Get the Error Code returned by Curl.
            $curlErrno = curl_errno($ch);
            if($curlErrno){
                $curlError = curl_error($ch);
            curl_close($ch);
                throw new Exception($curlError);
            }
            //Close the Curl Session.
            curl_close($ch);
            //Decode the returned JSON string.
            $objResponse = json_decode($strResponse);
            if (@$objResponse->error){
                throw new Exception($objResponse->error_description);
            }
            return $objResponse->access_token;
        } catch (Exception $e) {
            throw $e;
        }
    }
    
    /*
     * Create and execute the HTTP CURL request.
     *
     * @param string $url        HTTP Url.
     * @param string $authHeader Authorization Header string.
     * @param string $postData   Data to post.
     *
     * @return string.
     *
     */
    private function curlRequest($url, $authHeader) {
        //Initialize the Curl Session.
        $ch = curl_init();
        //Set the Curl url.
        curl_setopt ($ch, CURLOPT_URL, $url);
        //Set the HTTP HEADER Fields.
        curl_setopt ($ch, CURLOPT_HTTPHEADER, array($authHeader,"Content-Type: text/xml"));
        //CURLOPT_RETURNTRANSFER- TRUE to return the transfer as a string of the return value of curl_exec().
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);
        //CURLOPT_SSL_VERIFYPEER- Set FALSE to stop cURL from verifying the peer's certificate.
        curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, False);
        //Execute the  cURL session.
        $curlResponse = curl_exec($ch);
        //Get the Error Code returned by Curl.
        $curlErrno = curl_errno($ch);
        if ($curlErrno) {
            $curlError = curl_error($ch);
			curl_close($ch);
            throw new Exception($curlError);
        }
        //Close a cURL session.
        curl_close($ch);
        return $curlResponse;
    }
}
?>