<?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_Paypal
 * @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)
 */

/**
 * Paypal Data helper
 */
class Mage_Paypal_Helper_Data extends Mage_Core_Helper_Abstract
{
    /**
     * Cache for shouldAskToCreateBillingAgreement()
     *
     * @var bool
     */
    protected static $_shouldAskToCreateBillingAgreement = null;

    /**
     * Check whether customer should be asked confirmation whether to sign a billing agreement
     *
     * @param Mage_Paypal_Model_Config $config
     * @param int $customerId
     * @return bool
     */
    public function shouldAskToCreateBillingAgreement(Mage_Paypal_Model_Config $config, $customerId)
    {
        if (null === self::$_shouldAskToCreateBillingAgreement) {
            self::$_shouldAskToCreateBillingAgreement = false;
            if ($customerId && $config->shouldAskToCreateBillingAgreement()) {
                if (Mage::getModel('sales/billing_agreement')->needToCreateForCustomer($customerId)) {
                    self::$_shouldAskToCreateBillingAgreement = true;
                }
            }
        }
        return self::$_shouldAskToCreateBillingAgreement;
    }

    /**
     * Return backend config for element like JSON
     *
     * @param Varien_Data_Form_Element_Abstract $element
     * @return string
     */
    public function getElementBackendConfig(Varien_Data_Form_Element_Abstract $element) {
        $config = $element->getFieldConfig()->backend_congif;
        if (!$config) {
            return false;
        }
        $config = $config->asCanonicalArray();
        if (isset($config['enable_for_countries'])) {
            $config['enable_for_countries'] = explode(',', str_replace(' ', '', $config['enable_for_countries']));
        }
        if (isset($config['disable_for_countries'])) {
            $config['disable_for_countries'] = explode(',', str_replace(' ', '', $config['disable_for_countries']));
        }
        return Mage::helper('core')->jsonEncode($config);
    }
}