<?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_Tax
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


class Mage_Tax_Model_Class_Source_Product extends Mage_Eav_Model_Entity_Attribute_Source_Abstract
{
    public function getAllOptions($withEmpty = false)
    {
        if (is_null($this->_options)) {
            $this->_options = Mage::getResourceModel('tax/class_collection')
                ->addFieldToFilter('class_type', 'PRODUCT')
                ->load()
                ->toOptionArray();
        }

        $options = $this->_options;
        array_unshift($options, array('value'=>'0', 'label'=>Mage::helper('tax')->__('None')));
        if ($withEmpty) {
            array_unshift($options, array('value'=>'', 'label'=>Mage::helper('tax')->__('-- Please Select --')));
        }
        return $options;
    }

    /**
     * Get a text for option value
     *
     * @param string|integer $value
     * @return string
     */
    public function getOptionText($value)
    {
        $options = $this->getAllOptions(false);

        foreach ($options as $item) {
            if ($item['value'] == $value) {
                return $item['label'];
            }
        }
        return false;
    }

    public function toOptionArray()
    {
        return $this->getAllOptions();
    }

    /**
     * Get Column(s) names for flat data building
     *
     * @return array
     */
    public function getFlatColums()
    {
        $columns = array();
        $columns[$this->getAttribute()->getAttributeCode()] = array(
            'type'      => 'int',
            'unsigned'  => false,
            'is_null'   => true,
            'default'   => null,
            'extra'     => null
        );
        return $columns;
   }

    /**
     * Retrieve Select for update Attribute value in flat table
     *
     * @param   int $store
     * @return  Varien_Db_Select|null
     */
    public function getFlatUpdateSelect($store)
    {
        return Mage::getResourceModel('eav/entity_attribute_option')
            ->getFlatUpdateSelect($this->getAttribute(), $store, false);
    }
}
