<?php

namespace Swissup\Recaptcha\Block;

class Recaptcha extends \Magento\Framework\View\Element\Template
{
/**
* Captcha data
*
* @var \Magento\Captcha\Helper\Data
*/
protected $_captchaData = null;

/**
* @var string
*/
protected $_template = 'Swissup_Recaptcha::recaptcha/recaptcha.phtml';

/**
* @param \Magento\Framework\View\Element\Template\Context $context
* @param \Magento\Captcha\Helper\Data $captchaData
* @param array $data
*/
public function __construct(
\Magento\Framework\View\Element\Template\Context $context,
\Magento\Captcha\Helper\Data $captchaData,
array $data = []
) {
$this->_captchaData = $captchaData;
parent::__construct($context, $data);
}

/**
* Returns captcha model
*
* @return \Swissup\Recaptcha\Model\Recaptcha
*/
public function getCaptchaModel()
{
return $this->_captchaData->getCaptcha($this->getFormId());
}

/**
* Get options tio initialize JS widget
*
* @param string $format
* @return string|array
*/
public function getOptions($format = 'json')
{
$imageUrl = $this->getViewFileUrl('images/loader-2.gif');
$options = ['imageLoader' => $this->escapeUrl($imageUrl)]
+ $this->getCaptchaModel()->getJsOptions();

if ($format == 'json') {
return json_encode($options);
}

return $options;
}

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