<?php
/**
 * Action handler for a 'next' button of wizard-type multipage form
 *
 * PHP version 5
 *
 * LICENSE:
 *
 * Copyright (c) 2006-2010, Alexey Borzov <avb@php.net>,
 *                          Bertrand Mansion <golgote@mamasam.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *    * The names of the authors may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @category   HTML
 * @package    HTML_QuickForm2
 * @author     Alexey Borzov <avb@php.net>
 * @author     Bertrand Mansion <golgote@mamasam.com>
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @version    SVN: $Id: Next.php 293411 2010-01-11 16:51:32Z avb $
 * @link       http://pear.php.net/package/HTML_QuickForm2
 */

/** Interface for Controller action handlers */
// require_once 'HTML/QuickForm2/Controller/Action.php';

/**
 * Action handler for a 'next' button of wizard-type multipage form
 *
 * @category   HTML
 * @package    HTML_QuickForm2
 * @author     Alexey Borzov <avb@php.net>
 * @author     Bertrand Mansion <golgote@mamasam.com>
 * @version    Release: @package_version@
 */
class HTML_QuickForm2_Controller_Action_Next
    implements HTML_QuickForm2_Controller_Action
{
    public function perform(HTML_QuickForm2_Controller_Page $page, $name)
    {
        $valid = $page->storeValues();

        // Wizard and page is invalid: don't go further
        if ($page->getController()->isWizard() && !$valid) {
            return $page->handle('display');
        }

        // More pages?
        if (null !== ($next = $page->getController()->nextPage($page))) {
            return $next->handle('jump');

        // Consider this a 'finish' button, if there is no explicit one
        } elseif($page->getController()->isWizard()) {
            if ($page->getController()->isValid()) {
                return $page->handle('process');
            } else {
                // redirect to the first invalid page
                return $page->getController()->getFirstInvalidPage()->handle('jump');
            }

        } else {
            return $page->handle('display');
        }
    }
}
?>
