formidable / classes / models / FrmSpamCheckStopForumSpam.php

FrmSpamCheckStopForumSpam.php in Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More 6.22, at classes/models/FrmSpamCheckStopForumSpam.php

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1	<?php
2	/**
3	* Check spam using stopforumspam API
4	*
5	* @since 6.21
6	*
7	* @package Formidable
8	*/
9
10	if ( ! defined( 'ABSPATH' ) ) {
11	die( 'You are not allowed to call this page directly.' );
12	}
13
14	/**
15	* Class FrmSpamCheckStopForumSpam
16	*/
17	class FrmSpamCheckStopForumSpam extends FrmSpamCheck {
18
19	/**
20	* Checks spam.
21	*
22	* @return bool
23	*/
24	protected function check() {
25	$ip_address = FrmAppHelper::get_ip_address();
26	$whitelist_ip = FrmAntiSpamController::get_allowed_ips();
27	$request_data = array();
28
29	if ( ! in_array( $ip_address, $whitelist_ip, true ) ) {
30	$request_data['ip'] = $ip_address;
31	}
32
33	if ( $request_data ) {
34	$response = $this->send_request( $request_data );
35
36	if ( $this->response_is_spam( $response ) ) {
37	return true;
38	}
39	}
40
41	$emails = FrmAntiSpamController::extract_emails_from_values( $this->values['item_meta'] );
42	if ( ! $emails ) {
43	return false;
44	}
45
46	unset( $request_data['ip'] );
47	$request_data['email'] = $emails;
48	$response = $this->send_request( $request_data );
49
50	return $this->response_is_spam( $response );
51	}
52
53	/**
54	* Checks if this spam check is enabled.
55	*
56	* @return bool
57	*/
58	protected function is_enabled() {
59	$form = FrmForm::getOne( $this->values['form_id'] );
60	return $form && ! empty( $form->options['stopforumspam'] );
61	}
62
63	/**
64	* Sends API request.
65	*
66	* @param array $request_data Request data.
67	* @return string
68	*/
69	private function send_request( $request_data ) {
70	/**
71	* Filters the data to be passed to the stopforumspam request URL.
72	*
73	* @since 6.21
74	*
75	* @param array $request_data Request data.
76	* @param array $args Contains `values`.
77	*/
78	$request_data = apply_filters( 'frm_stopforumspam_request_data', $request_data, array( 'values' => $this->values ) );
79
80	/**
81	* Filters the stopforumspam API URL.
82	*
83	* @since 6.21
84	*
85	* @param string $api_url API URL.
86	* @param array $args Contains `values`.
87	*/
88	$api_url = apply_filters( 'frm_stopforumspam_api_url', 'https://api.stopforumspam.org/api', array( 'values' => $this->values ) );
89
90	$url = add_query_arg( $request_data, $api_url );
91
92	$response = wp_remote_get( $url, array( 'timeout' => 15 ) );
93
94	return wp_remote_retrieve_body( $response );
95	}
96
97	/**
98	* Checks if the response is spam.
99	*
100	* @param string $response Response body.
101	* @return bool
102	*/
103	private function response_is_spam( $response ) {
104	if ( ! $response ) {
105	// Request failed or error happened.
106	return false;
107	}
108
109	return false !== strpos( $response, '<appears>yes</appears>' ) \|\| false !== strpos( $response, '<appears>1</appears>' );
110	}
111	}
112