← All changes | classes/models/FrmHoneypot.php +277 -25 6.4 → trunk View file →

		@@ -5,8 +5,26 @@
5	5
6	6	class FrmHoneypot extends FrmValidate {
7	7
8	8	/**
	9	+ * Track the printed selectors so we do not print the same CSS twice.
	10	+ *
	11	+ * @since 6.22
	12	+ *
	13	+ * @var array
	14	+ */
	15	+ private static $printed_honeypot_selectors = array();
	16	+
	17	+ /**
	18	+ * Option type.
	19	+ *
	20	+ * @since 6.21
	21	+ *
	22	+ * @var string
	23	+ */
	24	+ protected $option_type = 'global';
	25	+
	26	+ /**
9	27	* @return string
10	28	*/
11	29	protected function get_option_key() {
12	30	return 'honeypot';
		@@ -14,11 +32,18 @@
14	32
15	33	/**
16	34	* @return bool
17	35	*/
	36	+ private static function is_enabled() {
	37	+ return (bool) FrmAppHelper::get_settings()->honeypot;
	38	+ }
	39	+
	40	+ /**
	41	+ * @return bool
	42	+ */
18	43	public function validate() {
19	44	if ( ! $this->is_option_on() || ! $this->check_honeypot_filter() ) {
20		- // never flag as honeypot spam if disabled.
	45	+ // Never flag as honeypot spam if disabled.
21	46	return true;
22	47	}
23	48	return ! $this->is_honeypot_spam();
24	49	}
		@@ -23,19 +48,48 @@
23	48	return ! $this->is_honeypot_spam();
24	49	}
25	50
26	51	/**
27		- * @return boolean
	52	+ * @return bool
28	53	*/
29	54	private function is_honeypot_spam() {
30		- $honeypot_value = FrmAppHelper::get_param( 'frm_verify', '', 'get', 'sanitize_text_field' );
31		- $is_honeypot_spam = $honeypot_value !== '';
32		- $form = $this->get_form();
33		- $atts = compact( 'form' );
	55	+ $is_honeypot_spam = $this->is_legacy_honeypot_spam();
	56	+
	57	+ if ( ! $is_honeypot_spam ) {
	58	+ $field_id = $this->get_honeypot_field_id();
	59	+
	60	+ if ( ! $field_id ) {
	61	+ return false;
	62	+ }
	63	+
	64	+ $value = $this->get_honeypot_field_value( $field_id );
	65	+ $is_honeypot_spam = '' !== $value;
	66	+ }
	67	+
	68	+ $atts = array(
	69	+ 'form' => $this->get_form(),
	70	+ );
	71	+
	72	+ /**
	73	+ * Filters the honeypot spam check.
	74	+ *
	75	+ * @param bool $is_honeypot_spam Set to `true` if is spam.
	76	+ * @param array $atts Contains `form` and `fields`.
	77	+ */
34	78	return apply_filters( 'frm_process_honeypot', $is_honeypot_spam, $atts );
35	79	}
36	80
37	81	/**
	82	+ * Check the old frm_verify key. We'll continue to consider any entry with an frm_verify value as spam.
	83	+ *
	84	+ * @return bool
	85	+ */
	86	+ private function is_legacy_honeypot_spam() {
	87	+ $legacy_honeypot_value = FrmAppHelper::get_param( 'frm_verify', '', 'get', 'sanitize_text_field' );
	88	+ return '' !== $legacy_honeypot_value;
	89	+ }
	90	+
	91	+ /**
38	92	* @return mixed either true, or false.
39	93	*/
40	94	private function check_honeypot_filter() {
41	95	$form = $this->get_form();
		@@ -42,29 +96,122 @@
42	96	return apply_filters( 'frm_run_honeypot', true, compact( 'form' ) );
43	97	}
44	98
45	99	/**
46		- * @return string
	100	+ * @param int $form_id Form ID.
	101	+ *
	102	+ * @return void
47	103	*/
48		- private function check_honeypot_setting() {
49		- $form = $this->get_form();
50		- $key = $this->get_option_key();
51		- return $form->options[ $key ];
	104	+ public static function maybe_render_field( $form_id ) {
	105	+ $honeypot = new self( $form_id );
	106	+
	107	+ if ( ! $honeypot->should_render_field() ) {
	108	+ return;
	109	+ }
	110	+
	111	+ $max_field_id = FrmDb::get_var(
	112	+ 'frm_fields',
	113	+ array(),
	114	+ 'id',
	115	+ array(
	116	+ 'order_by' => 'id DESC',
	117	+ )
	118	+ );
	119	+
	120	+ global $frm_vars;
	121	+ $offset = isset( $frm_vars['honeypot_selectors'] ) ? count( $frm_vars['honeypot_selectors'] ) + 1 : 1;
	122	+ $honeypot_field_id = $max_field_id ? $max_field_id + $offset : $offset;
	123	+ $class = class_exists( 'FrmProFormState' ) ? 'FrmProFormState' : 'FrmFormState';
	124	+ $class::set_initial_value( 'honeypot_field_id', $honeypot_field_id );
	125	+
	126	+ $honeypot->render_field( $honeypot_field_id );
	127	+ self::maybe_print_honeypot_css();
52	128	}
53	129
54	130	/**
55		- * @param int $form_id
	131	+ * Maybe print honeypot JS.
56	132	*
	133	+ * @since 6.21
	134	+ *
57	135	* @return void
58	136	*/
59		- public static function maybe_render_field( $form_id ) {
60		- $honeypot = new self( $form_id );
61		- if ( $honeypot->should_render_field() ) {
62		- $honeypot->render_field();
	137	+ public static function maybe_print_honeypot_js() {
	138	+ if ( FrmAppHelper::is_admin() || ! self::is_enabled() ) {
	139	+ return;
63	140	}
	141	+
	142	+ $css = self::get_honeypot_field_css();
	143	+
	144	+ if ( ! $css ) {
	145	+ return;
	146	+ }
	147	+
	148	+ // There must be no empty lines inside the script. Otherwise, wpautop adds <p> tags which break script execution.
	149	+ printf(
	150	+ "<script>
	151	+ ( function() {
	152	+ const style = document.createElement( 'style' );
	153	+ style.appendChild( document.createTextNode( '%s' ) );
	154	+ document.head.appendChild( style );
	155	+ document.currentScript?.remove();
	156	+ } )();
	157	+ </script>",
	158	+ esc_js( $css )
	159	+ );
	160	+
	161	+ global $frm_vars;
	162	+ self::$printed_honeypot_selectors = $frm_vars['honeypot_selectors'];
64	163	}
65	164
66	165	/**
	166	+ * Maybe print honeypot CSS in case JS doesn't run.
	167	+ *
	168	+ * @since 6.21
	169	+ *
	170	+ * @return void
	171	+ */
	172	+ public static function maybe_print_honeypot_css() {
	173	+ // Print the CSS if form is loaded by API.
	174	+ if ( ! FrmFormsHelper::form_is_loaded_by_api() ) {
	175	+ return;
	176	+ }
	177	+
	178	+ $css = self::get_honeypot_field_css();
	179	+
	180	+ if ( $css ) {
	181	+ echo '<style>' . esc_html( $css ) . '</style>';
	182	+ }
	183	+ }
	184	+
	185	+ /**
	186	+ * Gets honeypot field CSS.
	187	+ *
	188	+ * @return string
	189	+ */
	190	+ private static function get_honeypot_field_css() {
	191	+ global $frm_vars;
	192	+
	193	+ if ( empty( $frm_vars['honeypot_selectors'] ) ) {
	194	+ return '';
	195	+ }
	196	+
	197	+ $selectors = $frm_vars['honeypot_selectors'];
	198	+
	199	+ if ( self::$printed_honeypot_selectors ) {
	200	+ $selectors = array_diff( $selectors, self::$printed_honeypot_selectors );
	201	+
	202	+ if ( ! $selectors ) {
	203	+ return '';
	204	+ }
	205	+ }
	206	+
	207	+ return sprintf(
	208	+ '%s {visibility:hidden;overflow:hidden;width:0;height:0;position:absolute;}',
	209	+ implode( ',', $selectors )
	210	+ );
	211	+ }
	212	+
	213	+ /**
67	214	* @return bool
68	215	*/
69	216	public function should_render_field() {
70	217	return $this->is_option_on() && $this->check_honeypot_filter();
		@@ -70,19 +217,124 @@
70	217	return $this->is_option_on() && $this->check_honeypot_filter();
71	218	}
72	219
73	220	/**
	221	+ * @param int $honeypot_field_id
	222	+ *
74	223	* @return void
75	224	*/
76		- public function render_field() {
77		- $honeypot = $this->check_honeypot_setting();
78		- $form = $this->get_form();
	225	+ public function render_field( $honeypot_field_id = 0 ) {
	226	+ if ( ! $honeypot_field_id ) {
	227	+ return;
	228	+ }
	229	+
	230	+ $field_id = $honeypot_field_id;
	231	+ $field_key = $this->get_honeypot_field_key();
	232	+ $input_attrs = array(
	233	+ 'id' => 'field_' . $field_key,
	234	+ 'type' => 'text',
	235	+ 'class' => 'frm_form_field form-field frm_verify',
	236	+ 'name' => 'item_meta[' . $field_id . ']',
	237	+ 'value' => $this->get_honeypot_field_value( $field_id ),
	238	+ );
	239	+
	240	+ $container_id = 'frm_field_' . $field_id . '_container';
	241	+ $this->track_html_id( $container_id );
	242	+ // phpcs:disable Generic.WhiteSpace.ScopeIndent
79	243	?>
80		- <div class="frm_verify" <?php echo in_array( $honeypot, array( true, 'strict' ), true ) ? '' : 'aria-hidden="true"'; ?>>
81		- <label for="frm_email_<?php echo esc_attr( $form->id ); ?>">
82		- <?php esc_html_e( 'If you are human, leave this field blank.', 'formidable' ); ?>
83		- </label>
84		- <input type="<?php echo esc_attr( 'strict' === $honeypot ? 'email' : 'text' ); ?>" class="frm_verify" id="frm_email_<?php echo esc_attr( $form->id ); ?>" name="frm_verify" value="<?php echo esc_attr( FrmAppHelper::get_param( 'frm_verify', '', 'get', 'wp_kses_post' ) ); ?>" <?php FrmFormsHelper::maybe_hide_inline(); ?> />
85		- </div>
	244	+ <div id="<?php echo esc_attr( $container_id ); ?>">
	245	+ <label for="<?php echo esc_attr( $input_attrs['id'] ); ?>" <?php FrmFormsHelper::maybe_hide_inline(); ?>>
	246	+ <?php esc_html_e( 'If you are human, leave this field blank.', 'formidable' ); ?>
	247	+ </label>
	248	+ <input <?php FrmAppHelper::array_to_html_params( $input_attrs, true ); ?> <?php FrmFormsHelper::maybe_hide_inline(); ?> />
	249	+ </div>
86	250	<?php
	251	+ // phpcs:enable Generic.WhiteSpace.ScopeIndent
	252	+ }
	253	+
	254	+ /**
	255	+ * @param string $html_id
	256	+ *
	257	+ * @return void
	258	+ */
	259	+ private function track_html_id( $html_id ) {
	260	+ global $frm_vars;
	261	+
	262	+ if ( ! isset( $frm_vars['honeypot_selectors'] ) ) {
	263	+ $frm_vars['honeypot_selectors'] = array();
	264	+ }
	265	+
	266	+ $frm_vars['honeypot_selectors'][] = '#' . $html_id;
	267	+ }
	268	+
	269	+ /**
	270	+ * @return int
	271	+ */
	272	+ private function get_honeypot_field_id() {
	273	+ $class = class_exists( 'FrmProFormState' ) ? 'FrmProFormState' : 'FrmFormState';
	274	+ return $class::get_from_request( 'honeypot_field_id', 0 );
	275	+ }
	276	+
	277	+ /**
	278	+ * @return string
	279	+ */
	280	+ private function get_honeypot_field_key() {
	281	+ return FrmAppHelper::generate_new_key( 5 );
	282	+ }
	283	+
	284	+ /**
	285	+ * Gets honeypot field value.
	286	+ *
	287	+ * @param string $field_id Field ID.
	288	+ *
	289	+ * @return string
	290	+ */
	291	+ private function get_honeypot_field_value( $field_id ) {
	292	+ $item_meta = FrmAppHelper::get_simple_request(
	293	+ array(
	294	+ 'param' => 'item_meta',
	295	+ 'default' => array(),
	296	+ 'type' => 'post',
	297	+ )
	298	+ );
	299	+
	300	+ if ( ! $item_meta || ! is_array( $item_meta ) ) {
	301	+ return '';
	302	+ }
	303	+
	304	+ return $item_meta[ $field_id ] ?? '';
	305	+ }
	306	+
	307	+ /**
	308	+ * Generate a random class name for our honeypot so it is less easy to detect.
	309	+ *
	310	+ * @return string The generated class name.
	311	+ */
	312	+ public static function generate_class_name() {
	313	+ $class_name = self::get_honeypot_class_name();
	314	+
	315	+ if ( 'frm_verify' !== $class_name ) {
	316	+ // Re-use the option.
	317	+ // We can't generate a new class too often or the field may not be hidden.
	318	+ return $class_name;
	319	+ }
	320	+
	321	+ $prefix = 'frm__';
	322	+ $class_name = $prefix . uniqid();
	323	+ update_option( 'frm_honeypot_class', $class_name );
	324	+ return $class_name;
	325	+ }
	326	+
	327	+ /**
	328	+ * @return string The current class name to use the for Honeypot field.
	329	+ */
	330	+ private static function get_honeypot_class_name() {
	331	+ $option = get_option( 'frm_honeypot_class' );
	332	+
	333	+ if ( ! is_string( $option ) ) {
	334	+ // For backward compatibility use the old class name.
	335	+ return 'frm_verify';
	336	+ }
	337	+
	338	+ return $option;
87	339	}
88	340	}