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session.php

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<?php
/* SVN FILE: $Id: view_2helpers_2session_8php-source.html 580 2008-07-01 14:45:49Z gwoo $ */
/**
 * Short description for file.
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework <http://www.cakephp.org/>
 * Copyright 2005-2008, Cake Software Foundation, Inc.
 *                              1785 E. Sahara Avenue, Suite 490-204
 *                              Las Vegas, Nevada 89104
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright       Copyright 2005-2008, Cake Software Foundation, Inc.
 * @link                http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package         cake
 * @subpackage      cake.cake.libs.view.helpers
 * @since           CakePHP(tm) v 1.1.7.3328
 * @version         $Revision: 580 $
 * @modifiedby      $LastChangedBy: gwoo $
 * @lastmodified    $Date: 2008-07-01 09:45:49 -0500 (Tue, 01 Jul 2008) $
 * @license         http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Session Helper.
 *
 * Session reading from the view.
 *
 * @package     cake
 * @subpackage  cake.cake.libs.view.helpers
 *
 */
if (!class_exists('cakesession')) {
    uses('session');
}

class SessionHelper extends CakeSession {
/**
 * List of helpers used by this helper
 *
 * @var array
 */
    var $helpers = null;
/**
 * Used to determine if methods implementation is used, or bypassed
 *
 * @var boolean
 */
    var $__active = true;
/**
 * Class constructor
 *
 * @param string $base
 */
    function __construct($base = null) {
        if (Configure::read('Session.start') === true) {
            parent::__construct($base, false);
        } else {
            $this->__active = false;
        }
    }
/**
 * Turn sessions on if 'Session.start' is set to false in core.php
 *
 * @param string $base
 */
    function activate($base = null) {
        $this->__active = true;
    }
/**
 * Used to read a session values set in a controller for a key or return values for all keys.
 *
 * In your view: $session->read('Controller.sessKey');
 * Calling the method without a param will return all session vars
 *
 * @param string $name the name of the session key you want to read
 *
 * @return values from the session vars
 * @access public
 */
    function read($name = null) {
        if ($this->__active === true && $this->__start()) {
            return parent::read($name);
        }
        return false;
    }
/**
 * Used to check is a session key has been set
 *
 * In your view: $session->check('Controller.sessKey');
 *
 * @param string $name
 * @return boolean
 * @access public
 */
    function check($name) {
        if ($this->__active === true && $this->__start()) {
            return parent::check($name);
        }
        return false;
    }
/**
 * Returns last error encountered in a session
 *
 * In your view: $session->error();
 *
 * @return string last error
 * @access public
 */
    function error() {
        if ($this->__active === true && $this->__start()) {
            return parent::error();
        }
        return false;
    }
/**
 * Used to render the message set in Controller::Session::setFlash()
 *
 * In your view: $session->flash('somekey');
 *                  Will default to flash if no param is passed
 *
 * @param string $key The [Message.]key you are rendering in the view.
 * @return string Will echo the value if $key is set, or false if not set.
 * @access public
 */
    function flash($key = 'flash') {
        if ($this->__active === true && $this->__start()) {
            if (parent::check('Message.' . $key)) {
                $flash = parent::read('Message.' . $key);

                if ($flash['layout'] == 'default') {
                    if (!empty($flash['params']['class'])) {
                        $class = $flash['params']['class'];
                    } else {
                        $class = 'message';
                    }
                    $out = '<div id="' . $key . 'Message" class="' . $class . '">' . $flash['message'] . '</div>';
                } elseif ($flash['layout'] == '' || $flash['layout'] == null) {
                    $out = $flash['message'];
                } else {
                    $view =& ClassRegistry::getObject('view');
                    list($tmpLayout, $tmpVars, $tmpTitle) = array($view->layout, $view->viewVars, $view->pageTitle);
                    list($view->layout, $view->viewVars, $view->pageTitle) = array($flash['layout'], $flash['params'], '');
                    $out = $view->renderLayout($flash['message']);
                    list($view->layout, $view->viewVars, $view->pageTitle) = array($tmpLayout, $tmpVars, $tmpTitle);
                }
                echo($out);
                parent::del('Message.' . $key);
                return true;
            }
        }
        return false;
    }
/**
 * Used to check is a session is valid in a view
 *
 * @return boolean
 * @access public
 */
    function valid() {
        if ($this->__active === true && $this->__start()) {
            return parent::valid();
        }
    }
/**
 * Override CakeSession::write().
 * This method should not be used in a view
 *
 * @return boolean
 * @access public
 */
    function write() {
        trigger_error(__('You can not write to a Session from the view', true), E_USER_WARNING);
    }
/**
 * Session id
 *
 * @return string Session id
 * @access public
 */
    function id() {
        return parent::id();
    }
/**
 * Determine if Session has been started
 * and attempt to start it if not
 *
 * @return boolean true if Session is already started, false if
 * Session could not be started
 * @access public
 */
    function __start() {
        if(!parent::started()) {
            parent::start();
        }
        return true;
    }
}
?>

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