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Edit File: Akismet.php

<?php

use NinjaForms\Includes\Abstracts\SotAction;
use NinjaForms\Includes\Traits\SotGetActionProperties;
use NinjaForms\Includes\Interfaces\SotAction as InterfacesSotAction;

// @codeCoverageIgnoreStart
if (! defined('ABSPATH') ) {
	exit;
}
// @codeCoverageIgnoreEnd

/**
 * Class NF_Actions_Akismet
 */
final class NF_Actions_Akismet extends SotAction implements InterfacesSotAction
{
	use SotGetActionProperties;

/**
	 * @var array
	 */
	protected $_tags = array('spam', 'filtering', 'akismet');

/**
	 * Constructor
	 */
	public function __construct()
	{
		parent::__construct();

$this->_name = 'akismet';
		$this->_group = 'core';
		$this->_timing = 'normal';
		$this->_priority = '10';

add_action('init', [$this, 'initHook']);
		add_filter('ninja_forms_action_type_settings', array($this, 'maybe_remove_action'));
	}

public function initHook(): void
	{
		$this->_nicename = esc_html__('Akismet Anti-Spam', 'ninja-forms');

$settings        = Ninja_Forms::config('ActionAkismetSettings');
		$this->_settings = array_merge($this->_settings, $settings);
	}

/**
	 * Remove the action registration if Akismet functions not available.
	 *
	 * @param array $action_type_settings
	 *
	 * @return array
	 */
	public function maybe_remove_action($action_type_settings)
	{
		if (! $this->akismet_available()) {
			unset($action_type_settings[$this->_name]);
		}

return $action_type_settings;
	}

/**
	 * Is Akismet installed and connected with a valid key?
	 *
	 * @return bool
	 */
	protected function akismet_available()
	{
		if (! is_callable(array('Akismet', 'get_api_key'))) {
			// Not installed and activated
			return false;
		}

$akismet_key = Akismet::get_api_key();
		if (empty($akismet_key)) {
			// No key entered
			return false;
		}

return 'valid' === Akismet::verify_key($akismet_key);
	}

/**
	 * Process the action
	 *
	 * @param array $action_settings
	 * @param int   $form_id
	 * @param array $data
	 *
	 * @return array
	 */
	public function process(array $action_settings, int $form_id, array $data): array
	{
		if (! $this->akismet_available()) {
			return $data;
		}

if ($this->is_submission_spam($action_settings['name'], $action_settings['email'], $action_settings['url'], $action_settings['message'])) {
			$data['errors']['form']['spam'] = esc_html__('There was an error trying to send your message. Please try again later', 'ninja-forms');
		}

return $data;
	}

/**
	 * Verify submission
	 *
	 * @param $name
	 * @param $email
	 * @param $url
	 * @param $message
	 *
	 * @return bool
	 */
	protected function is_submission_spam($name, $email, $url, $message)
	{
		$body_request = array(
			'blog'                 => get_option('home'),
			'blog_lang'            => get_locale(),
			'permalink'            => get_permalink(),
			'comment_type'         => 'contact-form',
			'comment_author'       => $name,
			'comment_author_email' => $email,
			'comment_author_url'   => $url,
			'comment_content'      => $message,
			'user_agent'           => (isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null),
		);

if (method_exists('Akismet', 'http_post')) {
			$body_request['user_ip'] = Akismet::get_ip_address();
			$response                = Akismet::http_post(build_query($body_request), 'comment-check');
		} else {
			global $akismet_api_host, $akismet_api_port;
			$body_request['user_ip'] = (isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : null);
			$response                = akismet_http_post(build_query($body_request), $akismet_api_host, '/1.1/comment-check', $akismet_api_port);
		}

if (! empty($response) && isset($response[1]) && 'true' == trim($response[1])) {
			// Spam!
			return true;
		}

return false;
	}
}

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