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<?php
namespace {
/**
* Class implementing the Page Controller pattern for multipage forms
*
* 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: Controller.php 295963 2010-03-08 14:33:43Z avb $
* @link http://pear.php.net/package/HTML_QuickForm2
*/
/** The class representing a page of a multipage form */
// require_once 'HTML/QuickForm2/Controller/Page.php';
/** Object wrapping around session variable used to store controller data */
// require_once 'HTML/QuickForm2/Controller/SessionContainer.php';
/** Class presenting the values stored in session by Controller as submitted ones */
// require_once 'HTML/QuickForm2/DataSource/Session.php';
/**
* Class implementing the Page Controller pattern for multipage forms
*
* This class keeps track of pages and (default) action handlers for the form,
* it manages $_SESSION container for the form values, allows setting
* DataSources for the form as a whole and getting its value.
*
* @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 implements \IteratorAggregate
{
/**
* Key in $_REQUEST array that contains the ID of the Controller
*/
const KEY_ID = '_qfc_id';
/**
* Key in $_SESSION array that contains the Controller data (needs ID substituted via sprintf())
*/
const KEY_CONTAINER = '_%s_container';
/**
* Whether the form is a wizard
* @var boolean
*/
protected $wizard = \true;
/**
* Whether Controller ID should be sent in GET and POST parameters
* @var boolean
*/
protected $propagate = \true;
/**
* Controller ID
* @var string
*/
protected $id = null;
/**
* Contains the pages (instances of HTML_QuickForm2_Controller_Page) of the multipage form
* @var array
*/
protected $pages = array();
/**
* Contains the mapping of action names to handlers (objects implementing HTML_QuickForm2_Controller_Action)
* @var array
*/
protected $handlers = array();
/**
* The action extracted from HTTP request: array('page', 'action')
* @var array
*/
protected $actionName = null;
/**
* A wrapper around session variable used to store form data
* @var HTML_QuickForm2_Controller_SessionContainer
*/
protected $sessionContainer = null;
/**
* Finds a controller name in $_REQUEST
*
* @return string|null Returns nulle if either a KEY_ID is not present
* in $_REQUEST or KEY_CONTAINER is not present in
* $_SESSION
*/
public static function findControllerID()
{
if (empty($_REQUEST[self::KEY_ID]) || empty($_SESSION[\sprintf(self::KEY_CONTAINER, $_REQUEST[self::KEY_ID])])) {
return null;
} else {
return $_REQUEST[self::KEY_ID];
}
}
/**
* Class constructor
*
* Sets the form ID, whether to send this ID in POST and GET parameters,
* wizard / non-wizard behaviour.
*
* Different forms should be given different IDs, as they are used to store
* values in session. If $id is empty, the controller will try to find it
* in $_REQUEST, throwing the exception if this fails.
*
* Wizard forms only allow going to the next page if all the previous ones
* are valid.
*
* @param string Form ID
* @param boolean Whether the form is a wizard
* @param boolean Whether form's ID should be sent with GET and POST parameters
* @throws HTML_QuickForm2_NotFoundException if ID is not given and cannot
* be found in $_REQUEST, or session container is empty
*/
public function __construct($id = null, $wizard = \true, $propagateId = \false)
{
if (empty($id)) {
$propagateId = \true;
$id = self::findControllerID();
}
if (empty($id)) {
throw new \HTML_QuickForm2_NotFoundException('Controller ID not available in $_REQUEST or session ' . 'container is empty, please provide ID to constructor');
}
$this->id = $id;
$this->wizard = (bool) $wizard;
$this->propagate = (bool) $propagateId;
}
/**
* Returns whether the form is a wizard
*
* @return boolean
*/
public function isWizard()
{
return $this->wizard;
}
/**
* Returns the form ID
*
* @return string
*/
public function getId()
{
return $this->id;
}
/**
* Returns whether to send form id with GET and POST parameters
*
* @return boolean
*/
public function propagateId()
{
return $this->propagate;
}
/**
* Returns the session container with the controller data
*
* @return HTML_QuickForm2_Controller_SessionContainer
*/
public function getSessionContainer()
{
if (empty($this->sessionContainer)) {
$this->sessionContainer = new \HTML_QuickForm2_Controller_SessionContainer($this);
}
return $this->sessionContainer;
}
/**
* Removes the session variable containing the controller data
*/
public function destroySessionContainer()
{
unset($_SESSION[\sprintf(self::KEY_CONTAINER, $this->id)]);
$this->sessionContainer = null;
}
/**
* Extracts the name of the page and the action to perform with it from HTTP request data
*
* @return array first element is page name, second is action name
*/
public function getActionName()
{
if (\is_array($this->actionName)) {
return $this->actionName;
}
if (empty($this->pages)) {
throw new \HTML_QuickForm2_NotFoundException('No pages added to the form');
}
$names = \array_map('preg_quote', \array_keys($this->pages));
$regex = '/^_qf_(' . \implode('|', $names) . ')_(.+?)(_x)?$/';
foreach (\array_keys($_REQUEST) as $key) {
if (\preg_match($regex, $key, $matches)) {
$this->actionName = array($matches[1], $matches[2]);
break;
}
}
if (!\is_array($this->actionName)) {
\reset($this->pages);
$this->actionName = array(\key($this->pages), 'display');
}
return $this->actionName;
}
/**
* Processes the request
*
* This finds the page, the action to perform with it and passes the action
* to the page's handle() method.
*
* @throws HTML_QuickForm2_Exception
*/
public function run()
{
list($page, $action) = $this->getActionName();
return $this->pages[$page]->handle($action);
}
/**
* Adds a handler for a specific action
*
* @param string action name
* @param HTML_QuickForm2_Controller_Action the handler for the action
*/
public function addHandler($actionName, \HTML_QuickForm2_Controller_Action $action)
{
$this->handlers[$actionName] = $action;
}
/**
* Handles an action
*
* This will be called if the page itself does not have a handler for a
* specific action. The method also loads and uses default handlers for
* common actions, if specific ones were not added.
*
* @param HTML_QuickForm2_Controller_Page form page
* @param string action name
* @throws HTML_QuickForm2_NotFoundException if handler for an action is missing
*/
public function handle(\HTML_QuickForm2_Controller_Page $page, $actionName)
{
if (!isset($this->handlers[$actionName]) && \in_array($actionName, array('next', 'back', 'submit', 'display', 'jump'))) {
$className = 'HTML_QuickForm2_Controller_Action_' . \ucfirst($actionName);
if (!\class_exists($className)) {
\HTML_QuickForm2_Loader::loadClass($className);
}
$this->addHandler($actionName, new $className());
}
if (isset($this->handlers[$actionName])) {
return $this->handlers[$actionName]->perform($page, $actionName);
} else {
throw new \HTML_QuickForm2_NotFoundException("Unhandled action '{$actionName}' for page '{$page->getForm()->getId()}'");
}
}
/**
* Adds a new page to the form
*
* @param HTML_QuickForm2_Controller_Page
*/
public function addPage(\HTML_QuickForm2_Controller_Page $page)
{
$pageId = $page->getForm()->getId();
if (!empty($this->pages[$pageId])) {
throw new \HTML_QuickForm2_InvalidArgumentException("Duplicate page ID '{$pageId}'");
}
$page->setController($this);
$this->pages[$pageId] = $page;
}
/**
* Returns a page
*
* @param string Page ID
* @return HTML_QuickForm2_Controller_Page
* @throws HTML_QuickForm2_NotFoundException if there is no page with
* the given ID
*/
public function getPage($pageId)
{
if (!empty($this->pages[$pageId])) {
return $this->pages[$pageId];
} else {
throw new \HTML_QuickForm2_NotFoundException("Unknown page '{$pageId}'");
}
}
/**
* Returns the page preceding the given one
*
* @param HTML_QuickForm2_Controller_Page
* @return HTML_QuickForm2_Controller_Page|null
*/
public function previousPage(\HTML_QuickForm2_Controller_Page $reference)
{
$previous = null;
foreach ($this->pages as $page) {
if ($page === $reference) {
return $previous;
}
$previous = $page;
}
return null;
}
/**
* Returns the page following the given one
*
* @param HTML_QuickForm2_Controller_Page
* @return HTML_QuickForm2_Controller_Page|null
*/
public function nextPage(\HTML_QuickForm2_Controller_Page $reference)
{
$previous = null;
foreach ($this->pages as $page) {
if ($previous === $reference) {
return $page;
}
$previous = $page;
}
return null;
}
/**
* Checks whether the pages of the controller are valid
*
* @param HTML_QuickForm2_Controller_Page If given, check only the pages
* before (not including) that page
* @return bool
*/
public function isValid(\HTML_QuickForm2_Controller_Page $reference = null)
{
$container = $this->getSessionContainer();
foreach ($this->pages as $id => $page) {
if ($reference === $page) {
return \true;
}
if (!$container->getValidationStatus($id)) {
// We should handle the possible situation when the user has never
// seen a page of a non-modal multipage form
if (!$this->isWizard() && null === $container->getValidationStatus($id)) {
// Empty Session datasource makes the form look submitted
$page->getForm()->setDatasources(\array_merge($container->getDatasources(), array(new \HTML_QuickForm2_DataSource_Session(array()))));
// This will store the "submitted" values in session and
// return validation status
if ($page->storeValues()) {
continue;
}
}
return \false;
}
}
return \true;
}
/**
* Returns the first page that failed validation
*
* @return HTML_QuickForm2_Controller_Page|null
*/
public function getFirstInvalidPage()
{
foreach ($this->pages as $id => $page) {
if (!$this->getSessionContainer()->getValidationStatus($id)) {
return $page;
}
}
return null;
}
/**
* Adds a new data source to the Controller
*
* Note that Controller data sources are stored in session, so your data source
* implementation should properly handle its (un)serialization.
*
* @param HTML_QuickForm2_DataSource Data source
*/
public function addDataSource(\HTML_QuickForm2_DataSource $datasource)
{
$this->getSessionContainer()->storeDatasources(\array_merge($this->getSessionContainer()->getDatasources(), array($datasource)));
}
/**
* Returns the form's values
*
* @return array
*/
public function getValue()
{
$values = array();
foreach (\array_keys($this->pages) as $id) {
$pageValues = $this->getSessionContainer()->getValues($id);
// skip elements representing actions
foreach ($pageValues as $key => $value) {
if (0 !== \strpos($key, '_qf')) {
if (isset($values[$key]) && \is_array($value)) {
$values[$key] = self::arrayMerge($values[$key], $value);
} else {
$values[$key] = $value;
}
}
}
}
return $values;
}
/**
* Merges two arrays
*
* Merges two arrays like the PHP function array_merge_recursive does,
* the difference being that existing integer keys will not be renumbered.
*
* @param array
* @param array
* @return array resulting array
*/
protected static function arrayMerge($a, $b)
{
foreach ($b as $k => $v) {
if (!\is_array($v) || isset($a[$k]) && !\is_array($a[$k])) {
$a[$k] = $v;
} else {
$a[$k] = self::arrayMerge(isset($a[$k]) ? $a[$k] : array(), $v);
}
}
return $a;
}
/**
* Returns an Iterator for the form's pages
*
* @return ArrayIterator
*/
public function getIterator() : \ArrayIterator
{
return new \ArrayIterator($this->pages);
}
}
}