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