dreamjob/lib/Cake/Model/Datasource/Session/DatabaseSession.php

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2014-02-18 12:10:29 +01:00
<?php
/**
* Database Session save handler. Allows saving session information into a model.
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Model.Datasource.Session
* @since CakePHP(tm) v 2.0
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
App::uses('CakeSessionHandlerInterface', 'Model/Datasource/Session');
App::uses('ClassRegistry', 'Utility');
/**
* DatabaseSession provides methods to be used with CakeSession.
*
* @package Cake.Model.Datasource.Session
*/
class DatabaseSession implements CakeSessionHandlerInterface {
/**
* Reference to the model handling the session data
*
* @var Model
*/
protected $_model;
/**
* Number of seconds to mark the session as expired
*
* @var integer
*/
protected $_timeout;
/**
* Constructor. Looks at Session configuration information and
* sets up the session model.
*
*/
public function __construct() {
$modelName = Configure::read('Session.handler.model');
if (empty($modelName)) {
$settings = array(
'class' => 'Session',
'alias' => 'Session',
'table' => 'cake_sessions',
);
} else {
$settings = array(
'class' => $modelName,
'alias' => 'Session',
);
}
$this->_model = ClassRegistry::init($settings);
$this->_timeout = Configure::read('Session.timeout') * 60;
}
/**
* Method called on open of a database session.
*
* @return boolean Success
*/
public function open() {
return true;
}
/**
* Method called on close of a database session.
*
* @return boolean Success
*/
public function close() {
return true;
}
/**
* Method used to read from a database session.
*
* @param integer|string $id The key of the value to read
* @return mixed The value of the key or false if it does not exist
*/
public function read($id) {
$row = $this->_model->find('first', array(
'conditions' => array($this->_model->primaryKey => $id)
));
if (empty($row[$this->_model->alias]['data'])) {
return false;
}
return $row[$this->_model->alias]['data'];
}
/**
* Helper function called on write for database sessions.
*
* @param integer $id ID that uniquely identifies session in database
* @param mixed $data The value of the data to be saved.
* @return boolean True for successful write, false otherwise.
*/
public function write($id, $data) {
if (!$id) {
return false;
}
$expires = time() + $this->_timeout;
$record = compact('id', 'data', 'expires');
$record[$this->_model->primaryKey] = $id;
return $this->_model->save($record);
}
/**
* Method called on the destruction of a database session.
*
* @param integer $id ID that uniquely identifies session in database
* @return boolean True for successful delete, false otherwise.
*/
public function destroy($id) {
return $this->_model->delete($id);
}
/**
* Helper function called on gc for database sessions.
*
* @param integer $expires Timestamp (defaults to current time)
* @return boolean Success
*/
public function gc($expires = null) {
if (!$expires) {
$expires = time();
} else {
$expires = time() - $expires;
}
return $this->_model->deleteAll(array($this->_model->alias . ".expires <" => $expires), false, false);
}
}