<?php
/*
 * Copyright 2007-2011 Charles du Jeu <contact (at) cdujeu.me>
 * This file is part of AjaXplorer.
 *
 * AjaXplorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * AjaXplorer 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 AjaXplorer.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The latest code can be found at <http://www.ajaxplorer.info/>.
 *
 * This functions are necessary to implement the bridge between Ajaxplorer
 * and other CMS's.
 */

/**
 * 
 * @param HttpClient $client
 * @return array
 */
function extractResponseCookies($client){
	//AJXP_Logger::debug(print_r($client, true));
	$cooks = $client->getHeader("set-cookie");
	if(empty($cooks)) return array();
	if(is_string($cooks)){
		$cooks = array($cooks);
	}
	$cookies = array();
	foreach ($cooks as $cookieString){
		list($name,$value) = explode("=", $cookieString);
        $ar = explode(";", $value);
		$value = array_shift($ar);
		$cookies[$name] = $value;
	}
	return $cookies;
}

function wordpress_remote_auth($host, $uri, $login, $pass, $formId = ""){
	$client = new HttpClient($host);
	$client->setHandleRedirects(false);
	$client->setHeadersOnly(true);		
	$res = $client->post($uri."/wp-login.php", array(
		"log" => $login, 
		"pwd" => $pass, 
		"wp-submit" => "Log In", 
		"testcookie" => 1)
	);
	$newCookies = extractResponseCookies($client);
	if(isSet($newCookies["AjaXplorer"])){
		return $newCookies["AjaXplorer"];
	}
	return "";
}

function joomla_remote_auth($host, $uri, $login, $pass, $formId = ""){
	
	$client = new HttpClient($host);
	$client->setHandleRedirects(false);
	$res = $client->get($uri);
	$content = $client->getContent();
    $postData = array(
   		"username" => $login,
   		"password" => $pass,
   		"Submit"   => "Log in",
   		"remember" => "yes"
   	);
    $xmlDoc = @DOMDocument::loadHTML($content);
    if($xmlDoc === false){
        $pos1 = strpos($content, "<form ");
        $pos2 = strpos($content, "</form>", $pos1);
        $content = substr($content, $pos1, $pos2 + "7" - $pos1);
        $xmlDoc = @DOMDocument::loadHTML($content);
    }
    if($xmlDoc !== false){
       	$xPath = new DOMXPath($xmlDoc);
       	if($formId == "") $formId = "login-form";
       	$nodes = $xPath->query('//form[@id="'.$formId.'"]');
       	if(!$nodes->length) {
       		return "";
       	}
       	$form = $nodes->item(0);
       	$postUri = $form->getAttribute("action");
       	$hiddens = $xPath->query('//input[@type="hidden"]', $form);
        foreach($hiddens as $hiddenNode){
       		$postData[$hiddenNode->getAttribute("name")] = $hiddenNode->getAttribute("value");
       	}
    }else{
        // Grab all inputs and hardcode $postUri.
        if(preg_match_all("<input type=\"hidden\" name=\"(.*)\" value=\"(.*)\">", $content, $matches)){
            foreach($matches[0] as $key => $match){
                $postData[$matches[1][$key]] = $matches[2][$key];
            }
            $postUri = "/login-form";
        }
    }
	//AJXP_Logger::debug("Carry on ". $hiddens->length);
	$client->setHandleRedirects(false);
	$client->setHeadersOnly(true);
	$client->setCookies(extractResponseCookies($client));
	$res2 = $client->post($postUri, $postData);
	$newCookies = extractResponseCookies($client);
	if(isSet($newCookies["AjaXplorer"])){
		return $newCookies["AjaXplorer"];
	}
	return "";
}

function drupal_remote_auth($host, $uri, $login, $pass, $formId = ""){
	
	$client = new HttpClient($host);
	$client->setHandleRedirects(false);
	$res = $client->get($uri);
	$content = $client->getContent();
	$xmlDoc = DOMDocument::loadHTML($content);
	$xPath = new DOMXPath($xmlDoc);
	if($formId == "") $formId = "user-login-form";
	$nodes = $xPath->query('//form[@id="'.$formId.'"]');
	if(!$nodes->length) {
		return "";
	}
	$form = $nodes->item(0);
	$postUri = $form->getAttribute("action");
	$hiddens = $xPath->query('//input[@type="hidden"]', $form);
	AJXP_Logger::debug("Carry on Drupal hiddens ". $hiddens->length);
	$postData = array(
		"name" => $login, 
		"pass" => $pass,
		"Submit"   => "Log in"
	);
	foreach($hiddens as $hiddenNode){
		$postData[$hiddenNode->getAttribute("name")] = $hiddenNode->getAttribute("value");
	}
	$client->setHandleRedirects(false);
	$client->setHeadersOnly(true);
	$client->setCookies(extractResponseCookies($client));
	$res2 = $client->post($postUri, $postData);
	$newCookies = extractResponseCookies($client);
	if(isSet($newCookies["AjaXplorer"])){
		return $newCookies["AjaXplorer"];
	}
	return "";
}
?>
