<?php


/**


 * Magento


 *


 * NOTICE OF LICENSE


 *


 * This source file is subject to the Open Software License (OSL 3.0)


 * that is bundled with this package in the file LICENSE.txt.


 * It is also available through the world-wide-web at this URL:


 * http://opensource.org/licenses/osl-3.0.php


 * If you did not receive a copy of the license and are unable to


 * obtain it through the world-wide-web, please send an email


 * to license@magentocommerce.com so we can send you a copy immediately.


 *


 * DISCLAIMER


 *


 * Do not edit or add to this file if you wish to upgrade Magento to newer


 * versions in the future. If you wish to customize Magento for your


 * needs please refer to http://www.magentocommerce.com for more information.


 *


 * @category    Mage


 * @package     Mage_XmlConnect


 * @copyright   Copyright (c) 2011 Magento Inc. (http://www.magentocommerce.com)


 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)


 */





/**


 * Xmlconnect form element collection


 *


 * @category    Mage


 * @package     Mage_XmlConnect


 * @author      Magento Core Team <core@magentocommerce.com>


 */


class Mage_XmlConnect_Model_Simplexml_Form_Element_Collection implements ArrayAccess, IteratorAggregate


{


    /**


     * Elements storage


     *


     * @var array


     */


    private $_elements;





    /**


     * Elements container


     *


     * @var Mage_XmlConnect_Model_Simplexml_Form_Abstract


     */


    private $_container;





    /**


     * Class constructor


     *


     * @param Mage_XmlConnect_Model_Simplexml_Form_Abstract $container


     */


    public function __construct($container)


    {


        $this->_elements = array();


        $this->_container = $container;


    }





    /**


     * Implementation of IteratorAggregate::getIterator()


     *


     * @return ArrayIterator


     */


    public function getIterator()


    {


        return new ArrayIterator($this->_elements);


    }





    /**


     * Implementation of ArrayAccess:offsetSet()


     *


     * @param mixed $key


     * @param mixed $value


     */


    public function offsetSet($key, $value)


    {


        $this->_elements[$key] = $value;


    }





    /**


     * Implementation of ArrayAccess:offsetGet()


     *


     * @param mixed $key


     */


    public function offsetGet($key)


    {


        return $this->_elements[$key];


    }





    /**


     * Implementation of ArrayAccess:offsetUnset()


     *


     * @param mixed $key


     */


    public function offsetUnset($key)


    {


        unset($this->_elements[$key]);


    }





    /**


     * Implementation of ArrayAccess:offsetExists()


     *


     * @param mixed $key


     * @return bool


     */


    public function offsetExists($key)


    {


        return isset($this->_elements[$key]);


    }





    /**


     * Add element to collection


     *


     * @param Mage_XmlConnect_Model_Simplexml_Form_Abstract $element


     * @param bool|string $after


     * @return Mage_XmlConnect_Model_Simplexml_Form_Abstract


     */


    public function add(Mage_XmlConnect_Model_Simplexml_Form_Abstract $element, $after = false)


    {


        // Set the Form for the node


        if ($this->_container->getForm() instanceof Mage_XmlConnect_Model_Simplexml_Form) {


            $element->setContainer($this->_container);


            $element->setForm($this->_container->getForm());


        }





        if ($after === false) {


            $this->_elements[] = $element;


        } elseif ($after === '^') {


            array_unshift($this->_elements, $element);


        } elseif (is_string($after)) {


            $newOrderElements = array();


            foreach ($this->_elements as $index => $currElement) {


                if ($currElement->getId() == $after) {


                    $newOrderElements[] = $currElement;


                    $newOrderElements[] = $element;


                    $this->_elements = array_merge($newOrderElements, array_slice($this->_elements, ++$index));


                    return $element;


                }


                $newOrderElements[] = $currElement;


            }


            $this->_elements[] = $element;


        }





        return $element;


    }





    /**


     * Sort elements by values using a user-defined comparison function


     *


     * @param mixed $callback


     * @return Mage_XmlConnect_Model_Simplexml_Form_Element_Collection


     */


    public function usort($callback)


    {


        usort($this->_elements, $callback);


        return $this;


    }





    /**


     * Remove element from collection


     *


     * @param mixed $elementId


     * @return Mage_XmlConnect_Model_Simplexml_Form_Element_Collection


     */


    public function remove($elementId)


    {


        foreach ($this->_elements as $index => $element) {


            if ($elementId == $element->getId()) {


                unset($this->_elements[$index]);


            }


        }


        return $this;


    }





    /**


     * Count elements in collection


     *


     * @return int


     */


    public function count()


    {


        return count($this->_elements);


    }





    /**


     * Find element by ID


     *


     * @param mixed $elementId


     * @return Mage_XmlConnect_Model_Simplexml_Form_Abstract|null


     */


    public function searchById($elementId)


    {


        foreach ($this->_elements as $element) {


            if ($element->getId() == $elementId) {


                return $element;


            }


        }


        return null;


    }


}