<?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_CatalogInventory
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Adminhtml catalog inventory "Minimum Qty Allowed in Shopping Cart" field
 *
 * @category   Mage
 * @package    Mage_CatalogInventory
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_CatalogInventory_Block_Adminhtml_Form_Field_Minsaleqty extends Mage_Adminhtml_Block_System_Config_Form_Field_Array_Abstract
{
    /**
     * @var Mage_CatalogInventory_Block_Adminhtml_Form_Field_Customergroup
     */
    protected $_groupRenderer;

    /**
     * Retrieve group column renderer
     *
     * @return Mage_CatalogInventory_Block_Adminhtml_Form_Field_Customergroup
     */
    protected function _getGroupRenderer()
    {
        if (!$this->_groupRenderer) {
            $this->_groupRenderer = $this->getLayout()->createBlock(
                'cataloginventory/adminhtml_form_field_customergroup', '',
                array('is_render_to_js_template' => true)
            );
            $this->_groupRenderer->setClass('customer_group_select');
            $this->_groupRenderer->setExtraParams('style="width:120px"');
        }
        return $this->_groupRenderer;
    }

    /**
     * Prepare to render
     */
    protected function _prepareToRender()
    {
        $this->addColumn('customer_group_id', array(
            'label' => Mage::helper('customer')->__('Customer Group'),
            'renderer' => $this->_getGroupRenderer(),
        ));
        $this->addColumn('min_sale_qty', array(
            'label' => Mage::helper('cataloginventory')->__('Minimum Qty'),
            'style' => 'width:100px',
        ));
        $this->_addAfter = false;
        $this->_addButtonLabel = Mage::helper('cataloginventory')->__('Add Minimum Qty');
    }

    /**
     * Prepare existing row data object
     *
     * @param Varien_Object
     */
    protected function _prepareArrayRow(Varien_Object $row)
    {
        $row->setData(
            'option_extra_attr_' . $this->_getGroupRenderer()->calcOptionHash($row->getData('customer_group_id')),
            'selected="selected"'
        );
    }
}
