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<?php

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if ( ! defined( 'ABSPATH' ) || ! class_exists( 'NF_Abstracts_Action' ) ) {

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exit;

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}

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/**

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* Class NF_Actions_Akismet

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final class NF_Actions_Akismet extends NF_Abstracts_Action {

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/**

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* @var string

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protected $_name = 'akismet';

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/**

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* @var array

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protected $_tags = array( 'spam', 'filtering', 'akismet' );

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/**

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* @var string

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protected $_timing = 'normal';

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/**

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* @var int

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protected $_priority = '10';

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/**

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* @var string

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protected $_group = 'core';

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/**

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* Constructor

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public function __construct() {

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parent::__construct();

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$this->_nicename = esc_html__( 'Akismet Anti-Spam', 'ninja-forms' );

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$settings = Ninja_Forms::config( 'ActionAkismetSettings' );

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$this->_settings = array_merge( $this->_settings, $settings );

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add_filter( 'ninja_forms_action_type_settings', array( $this, 'maybe_remove_action' ) );

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}

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/**

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* Remove the action registration if Akismet functions not available.

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* @param array $action_type_settings

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* @return array

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public function maybe_remove_action( $action_type_settings ) {

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if ( ! $this->akismet_available() ) {

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unset( $action_type_settings[ $this->_name ] );

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}

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return $action_type_settings;

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}

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/**

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* Is Akismet installed and connected with a valid key?

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* @return bool

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protected function akismet_available() {

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if ( ! is_callable( array( 'Akismet', 'get_api_key' ) ) ) {

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// Not installed and activated

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return false;

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}

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$akismet_key = Akismet::get_api_key();

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if ( empty( $akismet_key ) ) {

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// No key entered

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return false;

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}

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

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}

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/**

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* Process the action

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* @param array $action_settings

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* @param int $form_id

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* @param array $data

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* @return array

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public function process( $action_settings, $form_id, $data ) {

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if ( ! $this->akismet_available() ) {

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return $data;

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}

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if ( $this->is_submission_spam( $action_settings['name'], $action_settings['email'], $action_settings['url'], $action_settings['message'] ) ) {

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$data['errors']['form']['spam'] = esc_html__( 'There was an error trying to send your message. Please try again later', 'ninja-forms' );

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}

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return $data;

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}

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/**

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* Verify submission

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* @param $name

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* @param $email

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* @param $url

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* @param $message

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* @return bool

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protected function is_submission_spam( $name, $email, $url, $message ) {

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$body_request = array(

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'blog' => get_option( 'home' ),

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'blog_lang' => get_locale(),

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'permalink' => get_permalink(),

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'comment_type' => 'contact-form',

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'comment_author' => $name,

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'comment_author_email' => $email,

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'comment_author_url' => $url,

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'comment_content' => $message,

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'user_agent' => ( isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : null ),

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);

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if ( method_exists( 'Akismet', 'http_post' ) ) {

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$body_request['user_ip'] = Akismet::get_ip_address();

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$response = Akismet::http_post( build_query( $body_request ), 'comment-check' );

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} else {

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global $akismet_api_host, $akismet_api_port;

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$body_request['user_ip'] = ( isset( $_SERVER['REMOTE_ADDR'] ) ? $_SERVER['REMOTE_ADDR'] : null );

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$response = akismet_http_post( build_query( $body_request ), $akismet_api_host, '/1.1/comment-check', $akismet_api_port );

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}

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if ( ! empty( $response ) && isset( $response[1] ) && 'true' == trim( $response[1] ) ) {

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// Spam!

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return true;

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}

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return false;

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}

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}

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