<?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_Captcha
 * @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)
 */

/**
 * Captcha block
 *
 * @category   Core
 * @package    Mage_Captcha
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Captcha_Block_Captcha_Zend extends Mage_Core_Block_Template
{
    protected $_template = 'captcha/zend.phtml';

    /**
     * @var string
     */
    protected $_captcha;

    /**
     * Returns template path
     *
     * @return string
     */
    public function getTemplate()
    {
        return $this->getIsAjax() ? '' : $this->_template;
    }

    /**
     * Returns URL to controller action which returns new captcha image
     *
     * @return string
     */
    public function getRefreshUrl()
    {
        return Mage::getUrl(
            Mage::app()->getStore()->isAdmin() ? 'adminhtml/refresh/refresh' : 'captcha/refresh',
            array('_secure' => Mage::app()->getStore()->isCurrentlySecure())
        );
    }

    /**
     * Renders captcha HTML (if required)
     *
     * @return string
     */
    protected function _toHtml()
    {
        if ($this->getCaptchaModel()->isRequired()) {
            $this->getCaptchaModel()->generate();
            return parent::_toHtml();
        }
        return '';
    }

    /**
     * Returns captcha model
     *
     * @return Mage_Captcha_Model_Abstract
     */
    public function getCaptchaModel()
    {
        return Mage::helper('captcha')->getCaptcha($this->getFormId());
    }
}