contact-forms / classes / Validation / CaptchaSpam.php

CaptchaSpam.php in Contact Forms by Cimatti 2.3.5, at classes/Validation/CaptchaSpam.php

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1	<?php
2	/**
3	* Shared base for captcha validations with a configurable spam action
4	* (reCAPTCHA v2 and v3).
5	*
6	* The secret key, the flag key and the per-form spam action live on the
7	* validation object (not on the Element) so they survive the encrypted-form
8	* serialization round trip: Element::__sleep() only keeps attributes, label,
9	* validation and errors.
10	*
11	* Spam action ($spamAction):
12	* - '' / 'reject' - a failed check makes validation fail (visible error).
13	* The empty value only occurs on validators serialized before the spam
14	* action existed (encrypted-form round trip of an already-rendered page);
15	* new renders always receive the explicit value resolved by
16	* accua_forms_captcha_spam_action() ('spam' by default).
17	* - 'spam' / 'trash' / 'delete' - silent classification: a failed check lets
18	* the submission pass validation but flags it via self::$spam_flagged,
19	* keyed by $captchaAction; the submission handler then marks the stored
20	* submission as Spam, trashes it or deletes it, and skips the emails.
21	*
22	* @package Contact Forms
23	*/
24
25	abstract class AccuaForm_Validation_CaptchaSpam extends Validation {
26	protected $privateKey;
27
28	/**
29	* Request-scoped flag key, accuaform_{fid}. For reCAPTCHA v3 it doubles as
30	* the expected Google action; for v2 it is only the registry key.
31	*
32	* @var string
33	*/
34	protected $captchaAction = '';
35	protected $spamAction = '';
36
37	/**
38	* Flag keys (accuaform_{fid}) whose captcha verification failed during this
39	* request while a silent spam action was configured, mapped to the silent
40	* action that validator was configured with. Shared by all captcha
41	* validators (the static lives on this base class).
42	*
43	* The action is recorded rather than a bare true because v2 and v3 have
44	* different defaults ('reject' and 'spam'): on a form carrying both, the
45	* submission handler must follow the action of the field that actually
46	* failed, not the first captcha field it happens to find.
47	*
48	* @var array<string, string>
49	*/
50	protected static $spam_flagged = array();
51
52	/**
53	* Whether the current request's submission for the given flag key was
54	* silently classified as spam.
55	*
56	* @param string $captcha_action The per-form flag key (accuaform_{fid}).
57	* @return bool
58	*/
59	public static function isSpamFlagged( $captcha_action ) {
60	return ! empty( self::$spam_flagged[ $captcha_action ] );
61	}
62
63	/**
64	* The silent spam action of the validator that flagged this request.
65	*
66	* @param string $captcha_action The per-form flag key (accuaform_{fid}).
67	* @return string 'spam', 'trash', 'delete', or '' when nothing was flagged.
68	*/
69	public static function getSpamAction( $captcha_action ) {
70	return isset( self::$spam_flagged[ $captcha_action ] ) ? (string) self::$spam_flagged[ $captcha_action ] : '';
71	}
72
73	/**
74	* Handle a failed verification according to the configured spam action:
75	* fail validation (reject) or flag the submission and let it pass (silent).
76	*
77	* @return bool The value isValid() must return.
78	*/
79	protected function failed() {
80	if ( in_array( $this->spamAction, array( 'spam', 'trash', 'delete' ), true ) ) {
81	self::$spam_flagged[ $this->captchaAction ] = $this->spamAction;
82	return true;
83	}
84	return false;
85	}
86	}
87