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<?php
class TAuthManager extends TComponent implements IModule
{
const RETURN_URL_VAR='ReturnUrl';
private $_guest='Guest';
private $_initialized=false;
private $_application;
private $_users=null;
private $_loginPage=null;
private $_skipAuthorization=false;
/**
* @return string id of this module
*/
public function getID()
{
return $this->_id;
}
/**
* @param string id of this module
*/
public function setID($value)
{
$this->_id=$value;
}
/**
* Initializes this module.
* This method is required by the IModule interface.
* @param IApplication Prado application, can be null
* @param TXmlElement configuration for this module, can be null
*/
public function init($application,$config)
{
$this->_application=$application;
$application->attachEventHandler('Authentication',array($this,'doAuthentication'));
$application->attachEventHandler('EndRequest',array($this,'leave'));
$application->attachEventHandler('Authorization',array($this,'doAuthorization'));
$this->_initialized=true;
}
public function getGuestName()
{
return $this->_guest;
}
public function setGuestName($value)
{
$this->_guest=$value;
}
public function getUserManager()
{
if($this->_users instanceof TUserManager)
return $this->_users;
else
{
if(($users=$this->_application->getModule($this->_users))===null)
throw new TConfigurationException('authenticator_usermanager_inexistent',$this->_users);
if(!($users instanceof TUserManager))
throw new TConfigurationException('authenticator_usermanager_invalid',$this->_users);
$this->_users=$users;
return $users;
}
}
public function setUserManager($provider)
{
$this->_users=$provider;
}
public function getLoginPage()
{
return $this->_loginPage;
}
public function setLoginPage($pagePath)
{
$this->_loginPage=$pagePath;
}
public function doAuthentication($sender,$param)
{
$this->onAuthenticate($param);
$service=$this->_application->getService();
if(($service instanceof TPageService) && $service->isRequestingPage($this->getLoginPage()))
$this->_skipAuthorization=true;
}
public function doAuthorization($sender,$param)
{
if(!$this->_skipAuthorization)
{
$this->onAuthorize($param);
}
}
public function leave($sender,$param)
{
if($this->_application->getResponse()->getStatusCode()===401)
{
$service=$this->_application->getService();
if($service instanceof TPageService)
{
$returnUrl=$this->_application->getRequest()->getRequestUri();
$url=$service->constructUrl($this->getLoginPage(),array(self::RETURN_URL_VAR=>$returnUrl));
$this->_application->getResponse()->redirect($url);
}
}
}
public function onAuthenticate($param)
{
if($this->hasEventHandler('Authenticate'))
$this->raiseEvent('Authenticate',$this,$this->_application);
if($this->_application->getUser()!==null)
return;
if(($session=$this->_application->getSession())===null)
throw new TConfigurationException('authenticator_session_required');
$session->open();
if(($userManager=$this->getUserManager())===null)
throw new TConfigurationException('authenticator_usermanager_required');
$sessionInfo=$session->getItems()->itemAt($this->generateUserSessionKey());
$user=$userManager->getUser(null)->loadFromString($sessionInfo);
$this->_application->setUser($user);
}
public function onAuthorize($param)
{
if($this->hasEventHandler('Authenticate'))
$this->raiseEvent('Authorize',$this,$this->_application);
if(!$this->_application->getAuthorizationRules()->isUserAllowed($this->_application->getUser(),$this->_application->getRequest()->getRequestType()))
{
$this->_application->getResponse()->setStatusCode(401);
$this->_application->completeRequest();
}
}
protected function generateUserSessionKey()
{
return md5($this->_application->getUniqueID().'prado:user');
}
public function updateSessionUser($user)
{
if(!$user->getIsGuest())
{
if(($session=$this->_application->getSession())===null)
throw new TConfigurationException('authenticator_session_required');
else
$session->getItems()->add($this->generateUserSessionKey(),$user->saveToString());
}
}
public function login($username,$password)
{
if(($userManager=$this->getUserManager())===null)
throw new TConfigurationException('authenticator_usermanager_required');
else
{
if($userManager->validateUser($username,$password))
{
$user=$userManager->getUser($username);
$this->updateSessionUser($user);
$this->_application->setUser($user);
return true;
}
else
return false;
}
}
public function logout()
{
if(($userManager=$this->getUserManager())===null)
throw new TConfigurationException('authenticator_usermanager_required');
else if(($session=$this->_application->getSession())===null)
throw new TConfigurationException('authenticator_session_required');
else
{
$userManager->logout($this->_application->getUser());
$session->destroy();
}
}
}
?>
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