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<?php
if ( ! defined( 'ABSPATH' ) || ! class_exists( 'NF_Abstracts_Action' ) ) {
exit;
}
/**
* Class NF_Actions_Akismet
*/
final class NF_Actions_Akismet extends NF_Abstracts_Action {
/**
* @var string
*/
protected $_name = 'akismet';
/**
* @var array
*/
protected $_tags = array( 'spam', 'filtering', 'akismet' );
/**
* @var string
*/
protected $_timing = 'normal';
/**
* @var int
*/
protected $_priority = '10';
/**
* Constructor
*/
public function __construct() {
parent::__construct();
$this->_nicename = esc_html__( 'Akismet Anti-Spam', 'ninja-forms' );
$settings = Ninja_Forms::config( 'ActionAkismetSettings' );
$this->_settings = array_merge( $this->_settings, $settings );
add_filter( 'ninja_forms_action_type_settings', array( $this, 'maybe_remove_action' ) );
}
/**
* 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( $action_settings, $form_id, $data ) {
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;
}
}