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<?php
/**
* Contao Open Source CMS
* Copyright (C) 2005-2011 Leo Feyer
*
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, please visit the Free
* Software Foundation website at <http://www.gnu.org/licenses/>.
*
* PHP version 5
* @copyright Leo Unglaub 2012
* @author Leo Unglaub <leo@leo-unglaub.net>
* @package simple_ajax
* @license LGPL
*/
// simple trick for Contao < 2.10
$arrPost = $_POST;
unset($_POST);
// inizialize the contao framework
define('TL_MODE', 'FE');
require('system/initialize.php');
// write the post data back into the array
$_POST = $arrPost;
/**
* Class SimpleAjaxFrontend
* Contain methods to catch ajax requests and send responses back to the client.
*
* Description
* ```````````
*
* The usage of the SimpleAjax extensions is very easy. The extension provides
* the hook $GLOBALS['TL_HOOKS']['simpleAjax'] for extension developers. You
* simply have to register your class/method and the extension will call
* your class if there is an incomming ajax request.
*
* You simply have to deside if it's an ajax request for your module and return
* the data you want.
*
* There are a few thinks you should know about the extension:
* * YOU have the full controll over the response. That also means
* that you have to set the correct header.
* * YOU have to terminate the request after you have send the response.
* * If the ajax request is not for your method you simply have nothing to
* * return.
*
*
* Usage
* `````
* // config.php
* $GLOBALS['TL_HOOKS']['simpleAjaxFrontend'][] = array('MyClassFrontend', 'myMethod');
*
* // MyClassFrontend.php
* class MyClassFrontend extends System
* {
* public function myMethod()
* {
* if ($this->Input->get('acid') == 'myrequest')
* {
* $arrReturn = array('foo', 'bar', 'foobar');
*
* header('Content-Type: application/json');
* echo json_encode($arrReturn);
* exit;
* }
* }
* }
*/
class SimpleAjaxFrontend extends Frontend
{
/**
* Set some important constants
*
* @param void
* @return void
*/
public function __construct()
{
// call the constructor from Frontend
parent::__construct();
// check if a user is logged in
define('BE_USER_LOGGED_IN', $this->getLoginStatus('BE_USER_AUTH'));
define('FE_USER_LOGGED_IN', $this->getLoginStatus('FE_USER_AUTH'));
// set static url's in case the user generated HTML code
$this->setStaticUrl('TL_FILES_URL', $GLOBALS['TL_CONFIG']['staticFiles']);
$this->setStaticUrl('TL_SCRIPT_URL', $GLOBALS['TL_CONFIG']['staticSystem']);
$this->setStaticUrl('TL_PLUGINS_URL', $GLOBALS['TL_CONFIG']['staticPlugins']);
}
/**
* Get the ajax request and call all hooks
*
* @param void
* @return void
*/
public function run()
{
// run the global hook
if (is_array($GLOBALS['TL_HOOKS']['simpleAjax']) && count($GLOBALS['TL_HOOKS']['simpleAjax']) > 0)
{
// execute every registered callback
foreach ($GLOBALS['TL_HOOKS']['simpleAjax'] as $callback)
{
$this->import($callback[0]);
$this->$callback[0]->$callback[1]();
}
}
// run the frontend exclusive hook
if (is_array($GLOBALS['TL_HOOKS']['simpleAjaxFrontend']) && count($GLOBALS['TL_HOOKS']['simpleAjaxFrontend']) > 0)
{
// execute every registered callback
foreach ($GLOBALS['TL_HOOKS']['simpleAjaxFrontend'] as $callback)
{
$this->import($callback[0]);
$this->$callback[0]->$callback[1]();
}
}
// if there is no other output, we generate a 412 error response
header('HTTP/1.1 412 Precondition Failed');
die('Simple Ajax: Invalid AJAX call.');
}
}
// create a SimpleAjax instance and run it
$objSimpleAjaxFrontend = new SimpleAjaxFrontend();
$objSimpleAjaxFrontend->run();
?>