formidable / classes / models / FrmSpamCheckStopForumSpam.php

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

114 lines 2.6 KB

Raw Download Zip

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
43	if ( ! $emails ) {
44	return false;
45	}
46
47	unset( $request_data['ip'] );
48	$request_data['email'] = $emails;
49	$response = $this->send_request( $request_data );
50
51	return $this->response_is_spam( $response );
52	}
53
54	/**
55	* Checks if this spam check is enabled.
56	*
57	* @return bool
58	*/
59	protected function is_enabled() {
60	$form = FrmForm::getOne( $this->values['form_id'] );
61	return $form && ! empty( $form->options['stopforumspam'] );
62	}
63
64	/**
65	* Sends API request.
66	*
67	* @param array $request_data Request data.
68	*
69	* @return string
70	*/
71	private function send_request( $request_data ) {
72	/**
73	* Filters the data to be passed to the stopforumspam request URL.
74	*
75	* @since 6.21
76	*
77	* @param array $request_data Request data.
78	* @param array $args Contains `values`.
79	*/
80	$request_data = apply_filters( 'frm_stopforumspam_request_data', $request_data, array( 'values' => $this->values ) );
81
82	/**
83	* Filters the stopforumspam API URL.
84	*
85	* @since 6.21
86	*
87	* @param string $api_url API URL.
88	* @param array $args Contains `values`.
89	*/
90	$api_url = apply_filters( 'frm_stopforumspam_api_url', 'https://api.stopforumspam.org/api', array( 'values' => $this->values ) );
91
92	$url = add_query_arg( $request_data, $api_url );
93	$response = wp_remote_get( $url, array( 'timeout' => 15 ) );
94
95	return wp_remote_retrieve_body( $response );
96	}
97
98	/**
99	* Checks if the response is spam.
100	*
101	* @param string $response Response body.
102	*
103	* @return bool
104	*/
105	private function response_is_spam( $response ) {
106	if ( ! $response ) {
107	// Request failed or error happened.
108	return false;
109	}
110
111	return str_contains( $response, '<appears>yes</appears>' ) \|\| str_contains( $response, '<appears>1</appears>' );
112	}
113	}
114