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FundacionLQDVI_WebCongresos/www/libraries/joomla/application/application.php

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<?php
/**
* @version $Id: application.php 16449 2010-04-25 21:17:31Z ian $
* @package Joomla.Framework
* @subpackage Application
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
/**
* Base class for a Joomla! application.
*
* Acts as a Factory class for application specific objects and provides many
* supporting API functions. Derived clases should supply the route(), dispatch()
* and render() functions.
*
* @abstract
* @package Joomla.Framework
* @subpackage Application
* @since 1.5
*/
class JApplication extends JObject
{
/**
* The client identifier.
*
* @var integer
* @access protected
* @since 1.5
*/
var $_clientId = null;
/**
* The application message queue.
*
* @var array
* @access protected
*/
var $_messageQueue = array();
/**
* The name of the application
*
* @var array
* @access protected
*/
var $_name = null;
/**
* The scope of the application
*
* @var string
* @access public
*/
var $scope = null;
/**
* Class constructor.
*
* @param integer A client identifier.
*/
function __construct($config = array())
{
jimport('joomla.utilities.utility');
//set the view name
$this->_name = $this->getName();
$this->_clientId = $config['clientId'];
//Enable sessions by default
if(!isset($config['session'])) {
$config['session'] = true;
}
//Set the session default name
if(!isset($config['session_name'])) {
$config['session_name'] = $this->_name;
}
//Set the default configuration file
if(!isset($config['config_file'])) {
$config['config_file'] = 'configuration.php';
}
//create the configuration object
$this->_createConfiguration(JPATH_CONFIGURATION.DS.$config['config_file']);
//create the session if a session name is passed
if($config['session'] !== false) {
$this->_createSession(JUtility::getHash($config['session_name']));
}
$this->set( 'requestTime', gmdate('Y-m-d H:i') );
}
/**
* Returns a reference to the global JApplication object, only creating it if it
* doesn't already exist.
*
* This method must be invoked as:
* <pre> $menu = &JApplication::getInstance();</pre>
*
* @access public
* @param mixed $id A client identifier or name.
* @param array $config An optional associative array of configuration settings.
* @return JApplication The appliction object.
* @since 1.5
*/
function &getInstance($client, $config = array(), $prefix = 'J')
{
static $instances;
if (!isset( $instances )) {
$instances = array();
}
if (empty($instances[$client]))
{
//Load the router object
jimport('joomla.application.helper');
$info =& JApplicationHelper::getClientInfo($client, true);
$path = $info->path.DS.'includes'.DS.'application.php';
if(file_exists($path))
{
require_once $path;
// Create a JRouter object
$classname = $prefix.ucfirst($client);
$instance = new $classname($config);
}
else
{
$error = JError::raiseError(500, 'Unable to load application: '.$client);
return $error;
}
$instances[$client] =& $instance;
}
return $instances[$client];
}
/**
* Initialise the application.
*
* @param array An optional associative array of configuration settings.
* @access public
*/
function initialise($options = array())
{
jimport('joomla.plugin.helper');
//Set the language in the class
$config =& JFactory::getConfig();
// Check that we were given a language in the array (since by default may be blank)
if(isset($options['language'])) {
$config->setValue('config.language', $options['language']);
}
// Set user specific editor
$user =& JFactory::getUser();
$editor = $user->getParam('editor', $this->getCfg('editor'));
$editor = JPluginHelper::isEnabled('editors', $editor) ? $editor : $this->getCfg('editor');
$config->setValue('config.editor', $editor);
}
/**
* Route the application.
*
* Routing is the process of examining the request environment to determine which
* component should receive the request. The component optional parameters
* are then set in the request object to be processed when the application is being
* dispatched.
*
* @abstract
* @access public
*/
function route()
{
// get the full request URI
$uri = clone(JURI::getInstance());
$router =& $this->getRouter();
$result = $router->parse($uri);
JRequest::set($result, 'get', false );
}
/**
* Dispatch the applicaiton.
*
* Dispatching is the process of pulling the option from the request object and
* mapping them to a component. If the component does not exist, it handles
* determining a default component to dispatch.
*
* @abstract
* @access public
*/
function dispatch($component)
{
$document =& JFactory::getDocument();
$document->setTitle( $this->getCfg('sitename' ). ' - ' .JText::_( 'Administration' ));
$document->setDescription( $this->getCfg('MetaDesc') );
$contents = JComponentHelper::renderComponent($component);
$document->setBuffer($contents, 'component');
}
/**
* Render the application.
*
* Rendering is the process of pushing the document buffers into the template
* placeholders, retrieving data from the document and pushing it into
* the JResponse buffer.
*
* @abstract
* @access public
*/
function render()
{
$params = array(
'template' => $this->getTemplate(),
'file' => 'index.php',
'directory' => JPATH_THEMES
);
$document =& JFactory::getDocument();
$data = $document->render($this->getCfg('caching'), $params );
JResponse::setBody($data);
}
/**
* Exit the application.
*
* @access public
* @param int Exit code
*/
function close( $code = 0 ) {
exit($code);
}
/**
* Redirect to another URL.
*
* Optionally enqueues a message in the system message queue (which will be displayed
* the next time a page is loaded) using the enqueueMessage method. If the headers have
* not been sent the redirect will be accomplished using a "301 Moved Permanently" or "303 See Other"
* code in the header pointing to the new location depending upon the moved flag. If the headers
* have already been sent this will be accomplished using a JavaScript statement.
*
* @access public
* @param string $url The URL to redirect to. Can only be http/https URL
* @param string $msg An optional message to display on redirect.
* @param string $msgType An optional message type.
* @param boolean True if the page is 301 Permanently Moved, otherwise 303 See Other is assumed.
* @return none; calls exit().
* @since 1.5
* @see JApplication::enqueueMessage()
*/
function redirect( $url, $msg='', $msgType='message', $moved = false )
{
// check for relative internal links
if (preg_match( '#^index[2]?.php#', $url )) {
$url = JURI::base() . $url;
}
// Strip out any line breaks
$url = preg_split("/[\r\n]/", $url);
$url = $url[0];
// If we don't start with a http we need to fix this before we proceed
// We could validly start with something else (e.g. ftp), though this would
// be unlikely and isn't supported by this API
if(!preg_match( '#^http#i', $url )) {
$uri =& JURI::getInstance();
$prefix = $uri->toString(Array('scheme', 'user', 'pass', 'host', 'port'));
if($url[0] == '/') {
// we just need the prefix since we have a path relative to the root
$url = $prefix . $url;
} else {
// its relative to where we are now, so lets add that
$parts = explode('/', $uri->toString(Array('path')));
array_pop($parts);
$path = implode('/',$parts).'/';
$url = $prefix . $path . $url;
}
}
// If the message exists, enqueue it
if (trim( $msg )) {
$this->enqueueMessage($msg, $msgType);
}
// Persist messages if they exist
if (count($this->_messageQueue))
{
$session =& JFactory::getSession();
$session->set('application.queue', $this->_messageQueue);
}
// If the headers have been sent, then we cannot send an additional location header
// so we will output a javascript redirect statement.
if (headers_sent()) {
echo "<script>document.location.href='$url';</script>\n";
} else {
header($moved ? 'HTTP/1.1 301 Moved Permanently' : 'HTTP/1.1 303 See other');
header('Location: '.$url);
}
$this->close();
}
/**
* Enqueue a system message.
*
* @access public
* @param string $msg The message to enqueue.
* @param string $type The message type.
* @return void
* @since 1.5
*/
function enqueueMessage( $msg, $type = 'message' )
{
// For empty queue, if messages exists in the session, enqueue them first
if (!count($this->_messageQueue))
{
$session =& JFactory::getSession();
$sessionQueue = $session->get('application.queue');
if (count($sessionQueue)) {
$this->_messageQueue = $sessionQueue;
$session->set('application.queue', null);
}
}
// Enqueue the message
$this->_messageQueue[] = array('message' => $msg, 'type' => strtolower($type));
}
/**
* Get the system message queue.
*
* @access public
* @return The system message queue.
* @since 1.5
*/
function getMessageQueue()
{
// For empty queue, if messages exists in the session, enqueue them
if (!count($this->_messageQueue))
{
$session =& JFactory::getSession();
$sessionQueue = $session->get('application.queue');
if (count($sessionQueue)) {
$this->_messageQueue = $sessionQueue;
$session->set('application.queue', null);
}
}
return $this->_messageQueue;
}
/**
* Gets a configuration value.
*
* @access public
* @param string The name of the value to get.
* @return mixed The user state.
* @example application/japplication-getcfg.php Getting a configuration value
*/
function getCfg( $varname )
{
$config =& JFactory::getConfig();
return $config->getValue('config.' . $varname);
}
/**
* Method to get the application name
*
* The dispatcher name by default parsed using the classname, or it can be set
* by passing a $config['name'] in the class constructor
*
* @access public
* @return string The name of the dispatcher
* @since 1.5
*/
function getName()
{
$name = $this->_name;
if (empty( $name ))
{
$r = null;
if ( !preg_match( '/J(.*)/i', get_class( $this ), $r ) ) {
JError::raiseError(500, "JApplication::getName() : Can\'t get or parse class name.");
}
$name = strtolower( $r[1] );
}
return $name;
}
/**
* Gets a user state.
*
* @access public
* @param string The path of the state.
* @return mixed The user state.
*/
function getUserState( $key )
{
$session =& JFactory::getSession();
$registry =& $session->get('registry');
if(!is_null($registry)) {
return $registry->getValue($key);
}
return null;
}
/**
* Sets the value of a user state variable.
*
* @access public
* @param string The path of the state.
* @param string The value of the variable.
* @return mixed The previous state, if one existed.
*/
function setUserState( $key, $value )
{
$session =& JFactory::getSession();
$registry =& $session->get('registry');
if(!is_null($registry)) {
return $registry->setValue($key, $value);
}
return null;
}
/**
* Gets the value of a user state variable.
*
* @access public
* @param string The key of the user state variable.
* @param string The name of the variable passed in a request.
* @param string The default value for the variable if not found. Optional.
* @param string Filter for the variable, for valid values see {@link JFilterInput::clean()}. Optional.
* @return The request user state.
*/
function getUserStateFromRequest( $key, $request, $default = null, $type = 'none' )
{
$old_state = $this->getUserState( $key );
$cur_state = (!is_null($old_state)) ? $old_state : $default;
$new_state = JRequest::getVar($request, null, 'default', $type);
// Save the new value only if it was set in this request
if ($new_state !== null) {
$this->setUserState($key, $new_state);
} else {
$new_state = $cur_state;
}
return $new_state;
}
/**
* Registers a handler to a particular event group.
*
* @static
* @param string The event name.
* @param mixed The handler, a function or an instance of a event object.
* @return void
* @since 1.5
*/
function registerEvent($event, $handler)
{
$dispatcher =& JDispatcher::getInstance();
$dispatcher->register($event, $handler);
}
/**
* Calls all handlers associated with an event group.
*
* @static
* @param string The event name.
* @param array An array of arguments.
* @return array An array of results from each function call.
* @since 1.5
*/
function triggerEvent($event, $args=null)
{
$dispatcher =& JDispatcher::getInstance();
return $dispatcher->trigger($event, $args);
}
/**
* Login authentication function.
*
* Username and encoded password are passed the the onLoginUser event which
* is responsible for the user validation. A successful validation updates
* the current session record with the users details.
*
* Username and encoded password are sent as credentials (along with other
* possibilities) to each observer (authentication plugin) for user
* validation. Successful validation will update the current session with
* the user details.
*
* @param array Array( 'username' => string, 'password' => string )
* @param array Array( 'remember' => boolean )
* @return boolean True on success.
* @access public
* @since 1.5
*/
function login($credentials, $options = array())
{
// Get the global JAuthentication object
jimport( 'joomla.user.authentication');
$authenticate = & JAuthentication::getInstance();
$response = $authenticate->authenticate($credentials, $options);
if ($response->status === JAUTHENTICATE_STATUS_SUCCESS)
{
$session = &JFactory::getSession();
// we fork the session to prevent session fixation issues
$session->fork();
$this->_createSession($session->getId());
// Import the user plugin group
JPluginHelper::importPlugin('user');
// OK, the credentials are authenticated. Lets fire the onLogin event
$results = $this->triggerEvent('onLoginUser', array((array)$response, $options));
/*
* If any of the user plugins did not successfully complete the login routine
* then the whole method fails.
*
* Any errors raised should be done in the plugin as this provides the ability
* to provide much more information about why the routine may have failed.
*/
if (!in_array(false, $results, true))
{
// Set the remember me cookie if enabled
if (isset($options['remember']) && $options['remember'])
{
jimport('joomla.utilities.simplecrypt');
jimport('joomla.utilities.utility');
//Create the encryption key, apply extra hardening using the user agent string
$key = JUtility::getHash(@$_SERVER['HTTP_USER_AGENT']);
$crypt = new JSimpleCrypt($key);
$rcookie = $crypt->encrypt(serialize($credentials));
$lifetime = time() + 365*24*60*60;
setcookie( JUtility::getHash('JLOGIN_REMEMBER'), $rcookie, $lifetime, '/' );
}
return true;
}
}
// Trigger onLoginFailure Event
$this->triggerEvent('onLoginFailure', array((array)$response));
// If silent is set, just return false
if (isset($options['silent']) && $options['silent']) {
return false;
}
// Return the error
return JError::raiseWarning('SOME_ERROR_CODE', JText::_('E_LOGIN_AUTHENTICATE'));
}
/**
* Logout authentication function.
*
* Passed the current user information to the onLogoutUser event and reverts the current
* session record back to 'anonymous' parameters.
*
* @param int $userid The user to load - Can be an integer or string - If string, it is converted to ID automatically
* @param array $options Array( 'clientid' => array of client id's )
*
* @access public
*/
function logout($userid = null, $options = array())
{
// Initialize variables
$retval = false;
// Get a user object from the JApplication
$user = &JFactory::getUser($userid);
// Build the credentials array
$parameters['username'] = $user->get('username');
$parameters['id'] = $user->get('id');
// Set clientid in the options array if it hasn't been set already
if(empty($options['clientid'])) {
$options['clientid'][] = $this->getClientId();
}
// Import the user plugin group
JPluginHelper::importPlugin('user');
// OK, the credentials are built. Lets fire the onLogout event
$results = $this->triggerEvent('onLogoutUser', array($parameters, $options));
/*
* If any of the authentication plugins did not successfully complete
* the logout routine then the whole method fails. Any errors raised
* should be done in the plugin as this provides the ability to provide
* much more information about why the routine may have failed.
*/
if (!in_array(false, $results, true)) {
setcookie( JUtility::getHash('JLOGIN_REMEMBER'), false, time() - 86400, '/' );
return true;
}
// Trigger onLoginFailure Event
$this->triggerEvent('onLogoutFailure', array($parameters));
return false;
}
/**
* Gets the name of the current template.
*
* @return string
*/
function getTemplate()
{
return 'system';
}
/**
* Return a reference to the application JRouter object.
*
* @access public
* @param array $options An optional associative array of configuration settings.
* @return JRouter.
* @since 1.5
*/
function &getRouter($name = null, $options = array())
{
if(!isset($name)) {
$name = $this->_name;
}
jimport( 'joomla.application.router' );
$router =& JRouter::getInstance($name, $options);
if (JError::isError($router)) {
$null = null;
return $null;
}
return $router;
}
/**
* Return a reference to the application JPathway object.
*
* @access public
* @param array $options An optional associative array of configuration settings.
* @return object JPathway.
* @since 1.5
*/
function &getPathway($name = null, $options = array())
{
if(!isset($name)) {
$name = $this->_name;
}
jimport( 'joomla.application.pathway' );
$pathway =& JPathway::getInstance($name, $options);
if (JError::isError($pathway)) {
$null = null;
return $null;
}
return $pathway;
}
/**
* Return a reference to the application JPathway object.
*
* @access public
* @param array $options An optional associative array of configuration settings.
* @return object JMenu.
* @since 1.5
*/
function &getMenu($name = null, $options = array())
{
if(!isset($name)) {
$name = $this->_name;
}
jimport( 'joomla.application.menu' );
$menu =& JMenu::getInstance($name, $options);
if (JError::isError($menu)) {
$null = null;
return $null;
}
return $menu;
}
/**
* Create the configuration registry
*
* @access private
* @param string $file The path to the configuration file
* return JConfig
*/
function &_createConfiguration($file)
{
jimport( 'joomla.registry.registry' );
require_once( $file );
// Create the JConfig object
$config = new JConfig();
// Get the global configuration object
$registry =& JFactory::getConfig();
// Load the configuration values into the registry
$registry->loadObject($config);
return $config;
}
/**
* Create the user session.
*
* Old sessions are flushed based on the configuration value for the cookie
* lifetime. If an existing session, then the last access time is updated.
* If a new session, a session id is generated and a record is created in
* the #__sessions table.
*
* @access private
* @param string The sessions name.
* @return object JSession on success. May call exit() on database error.
* @since 1.5
*/
function &_createSession( $name )
{
$options = array();
$options['name'] = $name;
switch($this->_clientId) {
case 0:
if($this->getCfg('force_ssl') == 2) {
$options['force_ssl'] = true;
}
break;
case 1:
if($this->getCfg('force_ssl') >= 1) {
$options['force_ssl'] = true;
}
break;
}
$session =& JFactory::getSession($options);
jimport('joomla.database.table');
$storage = & JTable::getInstance('session');
$storage->purge($session->getExpire());
// Session exists and is not expired, update time in session table
if ($storage->load($session->getId())) {
$storage->update();
return $session;
}
//Session doesn't exist yet, initalise and store it in the session table
$session->set('registry', new JRegistry('session'));
$session->set('user', new JUser());
if (!$storage->insert( $session->getId(), $this->getClientId())) {
jexit( $storage->getError());
}
return $session;
}
/**
* Gets the client id of the current running application.
*
* @access public
* @return int A client identifier.
* @since 1.5
*/
function getClientId( )
{
return $this->_clientId;
}
/**
* Is admin interface?
*
* @access public
* @return boolean True if this application is administrator.
* @since 1.0.2
*/
function isAdmin()
{
return ($this->_clientId == 1);
}
/**
* Is site interface?
*
* @access public
* @return boolean True if this application is site.
* @since 1.5
*/
function isSite()
{
return ($this->_clientId == 0);
}
/**
* Deprecated functions
*/
/**
* Deprecated, use JPathWay->addItem() method instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JPathWay::addItem()
*/
function appendPathWay( $name, $link = null )
{
/*
* To provide backward compatability if no second parameter is set
* set it to null
*/
if ($link == null) {
$link = '';
}
$pathway =& $this->getPathway();
if( defined( '_JLEGACY' ) && $link == '' )
{
$matches = array();
$links = preg_match_all ( '/<a[^>]+href="([^"]*)"[^>]*>([^<]*)<\/a>/ui', $name, $matches, PREG_SET_ORDER );
foreach( $matches AS $match) {
// Add each item to the pathway object
if( !$pathway->addItem( $match[2], $match[1] ) ) {
return false;
}
}
return true;
}
else
{
// Add item to the pathway object
if ($pathway->addItem($name, $link)) {
return true;
}
}
return false;
}
/**
* Deprecated, use JPathway->getPathWayNames() method instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JPathWay::getPathWayNames()
*/
function getCustomPathWay()
{
$pathway = $this->getPathway();
return $pathway->getPathWayNames();
}
/**
* Deprecated, use JDocument->get( 'head' ) instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JDocument
* @see JObject::get()
*/
function getHead()
{
$document=& JFactory::getDocument();
return $document->get('head');
}
/**
* Deprecated, use JDocument->setMetaData instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @param string Name of the metadata tag
* @param string Content of the metadata tag
* @param string Deprecated, ignored
* @param string Deprecated, ignored
* @see JDocument::setMetaData()
*/
function addMetaTag( $name, $content, $prepend = '', $append = '' )
{
$document=& JFactory::getDocument();
$document->setMetadata($name, $content);
}
/**
* Deprecated, use JDocument->setMetaData instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @param string Name of the metadata tag
* @param string Content of the metadata tag
* @see JDocument::setMetaData()
*/
function appendMetaTag( $name, $content )
{
$this->addMetaTag($name, $content);
}
/**
* Deprecated, use JDocument->setMetaData instead
*
* @since 1.0
* @deprecated As of version 1.5
* @param string Name of the metadata tag
* @param string Content of the metadata tag
* @see JDocument::setMetaData()
*/
function prependMetaTag( $name, $content )
{
$this->addMetaTag($name, $content);
}
/**
* Deprecated, use JDocument->addCustomTag instead (only when document type is HTML).
*
* @since 1.0
* @deprecated As of version 1.5
* @param string Valid HTML
* @see JDocumentHTML::addCustomTag()
*/
function addCustomHeadTag( $html )
{
$document=& JFactory::getDocument();
if($document->getType() == 'html') {
$document->addCustomTag($html);
}
}
/**
* Deprecated.
*
* @since 1.0
* @deprecated As of version 1.5
*/
function getBlogSectionCount( )
{
$menus = &JSite::getMenu();
return count($menus->getItems('type', 'content_blog_section'));
}
/**
* Deprecated.
*
* @since 1.0
* @deprecated As of version 1.5
*/
function getBlogCategoryCount( )
{
$menus = &JSite::getMenu();
return count($menus->getItems('type', 'content_blog_category'));
}
/**
* Deprecated.
*
* @since 1.0
* @deprecated As of version 1.5
*/
function getGlobalBlogSectionCount( )
{
$menus = &JSite::getMenu();
return count($menus->getItems('type', 'content_blog_section'));
}
/**
* Deprecated.
*
* @since 1.0
* @deprecated As of version 1.5
*/
function getStaticContentCount( )
{
$menus = &JSite::getMenu();
return count($menus->getItems('type', 'content_typed'));
}
/**
* Deprecated.
*
* @since 1.0
* @deprecated As of version 1.5
*/
function getContentItemLinkCount( )
{
$menus = &JSite::getMenu();
return count($menus->getItems('type', 'content_item_link'));
}
/**
* Deprecated, use JApplicationHelper::getPath instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JApplicationHelper::getPath()
*/
function getPath($varname, $user_option = null)
{
jimport('joomla.application.helper');
return JApplicationHelper::getPath ($varname, $user_option);
}
/**
* Deprecated, use JURI::base() instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JURI::base()
*/
function getBasePath($client=0, $addTrailingSlash = true)
{
return JURI::base();
}
/**
* Deprecated, use JFactory::getUser instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JFactory::getUser()
*/
function &getUser()
{
$user =& JFactory::getUser();
return $user;
}
/**
* Deprecated, use ContentHelper::getItemid instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see ContentHelperRoute::getArticleRoute()
*/
function getItemid( $id )
{
require_once JPATH_SITE.DS.'components'.DS.'com_content'.DS.'helpers'.DS.'route.php';
// Load the article data to know what section/category it is in.
$article =& JTable::getInstance('content');
$article->load($id);
$needles = array(
'article' => (int) $id,
'category' => (int) $article->catid,
'section' => (int) $article->sectionid,
);
$item = ContentHelperRoute::_findItem($needles);
$return = is_object($item) ? $item->id : null;
return $return;
}
/**
* Deprecated, use JDocument::setTitle instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JDocument::setTitle()
*/
function setPageTitle( $title=null )
{
$document=& JFactory::getDocument();
$document->setTitle($title);
}
/**
* Deprecated, use JDocument::getTitle instead.
*
* @since 1.0
* @deprecated As of version 1.5
* @see JDocument::getTitle()
*/
function getPageTitle()
{
$document=& JFactory::getDocument();
return $document->getTitle();
}
}
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