<?php

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/**

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*

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* Class PPW_Recaptcha

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*/

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class PPW_Recaptcha {

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const TYPE_PARAM = 'ppwp_type';

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const TYPE_VALUE = 'recaptcha';

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const RECAPTCHA_V3_TYPE = 'recaptcha_v3';

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const RECAPTCHA_V2_CHECKBOX_TYPE = 'recaptcha_v2_checkbox';

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const RECAPTCHA_V2_INVISIBLE_TYPE = 'recaptcha_v2_invisible';

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const SINGLE_PASSWORD = 'single';

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const PCP_PASSWORD = 'pcp';

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const SITEWIDE_PASSWORD = 'sitewide';

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private $show_message = false;

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/**

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* @var PPW_Recaptcha

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*/

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protected static $instance;

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/**

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* @return PPW_Recaptcha

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*/

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public static function get_instance() {

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if ( null == self::$instance ) {

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self::$instance = new self();

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}

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return self::$instance;

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}

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/**

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* Recaptcha error message.

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*

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* @return string

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*/

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public function get_error_message() {

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$message = get_theme_mod( 'ppwp_form_error_recaptcha_message_text', PPW_Constants::DEFAULT_ERROR_RECAPTCHA_MESSAGE );

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$message = wp_kses_post( $message );

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return _x( $message, PPW_Constants::CONTEXT_PASSWORD_FORM, PPW_Constants::DOMAIN );

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}

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/**

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* Register hooks.

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* @since 1.0.0

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*/

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public function register() {

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add_filter( 'ppwp_customize_ppf', array( $this, 'maybe_customize_error_message' ), 25 );

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add_filter( 'ppwp_ppf_redirect_url', array( $this, 'maybe_add_blocked_message' ), 20, 2 );

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add_filter( 'ppwp_ppf_referrer_url', array( $this, 'maybe_remove_recaptcha_query' ), 10, 2 );

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add_filter( 'ppwpea_recaptcha_v2_site_key', array( $this, 'get_ppwpea_recaptcha_v2_api_key' ), 10 );

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add_filter( 'ppwpea_recaptcha_v2_secret', array( $this, 'get_ppwpea_recaptcha_v2_api_secret' ), 10 );

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add_action( 'wp_footer', array( $this, 'load_js_in_footer' ), 10 );

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add_action( 'ppw_custom_footer_form_entire_site', array( $this, 'maybe_load_sitewide_recaptcha_js' ), 10 );

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add_action( 'ppw_sitewide_above_submit_button', array( $this, 'maybe_add_recaptcha_input_below_sitewide_form' ), 10 );

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add_action( 'ppw_sitewide_custom_internal_css', array( $this, 'customize_sitewide_css' ), 10 );

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add_filter( 'ppw_sitewide_valid_password', array( $this, 'validate_sitewide_password' ), 10 );

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}

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/**

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* Remove blocked query if user enter right password.

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*

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* @param string $referrer_url Referrer URL.

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*

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* @return string

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*/

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public function maybe_remove_recaptcha_query( $referrer_url ) {

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

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return $referrer_url;

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}

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if ( $this->has_recaptcha_parameter( $referrer_url ) ) {

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$referrer_url = add_query_arg( self::TYPE_PARAM, false, $referrer_url );

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}

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return $referrer_url;

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}

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public function using_recaptcha() {

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return ppw_core_get_setting_type_bool_by_option_name( PPW_Constants::USING_RECAPTCHA, PPW_Constants::EXTERNAL_OPTIONS );

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}

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/**

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* Add blocked message if user turn on option.

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*

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* @param string $redirect_url Redirect URL.

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* @param array $params Parameters.

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*

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* @return string

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*/

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public function maybe_add_blocked_message( $redirect_url, $params ) {

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

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return $redirect_url;

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}

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if ( $params['is_valid'] ) {

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return $redirect_url;

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}

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if ( ! $this->show_message ) {

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// Remove blocked parameter if URL has it.

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if ( $this->has_recaptcha_parameter( $redirect_url ) ) {

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$redirect_url = add_query_arg( self::TYPE_PARAM, false, $redirect_url );

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}

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return $redirect_url;

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}

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$redirect_url = add_query_arg( self::TYPE_PARAM, self::TYPE_VALUE, $redirect_url );

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return $redirect_url;

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}

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/**

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* Has recaptcha parameter on URL.

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*

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* @param string $url $url URL.

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* @param string $query_value Query value.

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*

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* @return bool

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*/

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private function has_recaptcha_parameter( $url = '', $query_value = self::TYPE_VALUE ) {

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if ( empty( $url ) ) {

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$query_params = ppw_core_get_query_param();

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} else {

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$query_params = ppw_core_get_param_in_url( $url );

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}

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if ( ! isset( $query_params[ self::TYPE_PARAM ] ) ) {

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return false;

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}

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return $query_value === $query_params[ self::TYPE_PARAM ];

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}

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/**

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* Customize error message.

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*

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* @param array $params Parameters.

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*

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* @return array

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*/

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public function maybe_customize_error_message( $params ) {

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

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return $params;

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}

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if ( $this->has_recaptcha_parameter() ) {

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$message = $this->get_error_message();

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$params['error_msg'] = apply_filters( 'ppw_recaptcha_error_message', $message, $params );

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}

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return $params;

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}

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/**

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* Validate recaptcha.

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*

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* @return bool

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*/

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public function is_valid_recaptcha() {

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$_post = wp_unslash( $_POST ); // phpcs:ignore WordPress.Security.NonceVerification.Missing -- We no need to handle nonce verification here because already handle on parent function.

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if ( ! isset( $_post['g-recaptcha-response'] ) ) {

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$this->show_message = true;

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return false;

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}

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$result = $this->verify_recaptcha( $_post['g-recaptcha-response'] );

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if ( ! $result['success'] ) {

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$this->show_message = true;

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return false;

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}

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return true;

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}

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/**

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* Get limit score.

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*

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* @return double

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*/

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public function get_limit_score() {

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$score = ppw_core_get_settings_by_option_name( PPW_Constants::RECAPTCHA_SCORE, PPW_Constants::EXTERNAL_OPTIONS );

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if ( is_null( $score ) ) {

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return (double) 0.5;

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}

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return (double) $score;

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}

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/**

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* Get setting api key of recaptcha with current type.

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*

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* @param string $type Recaptcha type.

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* @param string $default Default value.

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*

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* @return string

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*/

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public function get_setting_api_key( $type = '', $default = '' ) {

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if ( empty( $type ) ) {

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$type = $this->get_recaptcha_type();

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}

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switch ( $type ) {

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case self::RECAPTCHA_V3_TYPE:

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return $this->get_recaptcha_v3_api_key();

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case self::RECAPTCHA_V2_CHECKBOX_TYPE:

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return $this->get_recaptcha_v2_api_key();

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default:

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return $default;

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}

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}

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/**

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* Get setting api secret of recaptcha with current type.

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*

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* @param string $type Recaptcha type.

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* @param string $default Default value.

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*

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* @return string

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*/

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public function get_setting_api_secret( $type = '', $default = '' ) {

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if ( empty( $type ) ) {

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$type = $this->get_recaptcha_type();

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}

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switch ( $type ) {

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case self::RECAPTCHA_V3_TYPE:

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return $this->get_recaptcha_v3_api_secret();

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case self::RECAPTCHA_V2_CHECKBOX_TYPE:

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return $this->get_recaptcha_v2_api_secret();

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default:

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return $default;

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}

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}

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/**

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* Get recaptcha v3 API key.

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*

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* @return string

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*/

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public function get_recaptcha_v3_api_key() {

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return ppw_core_get_setting_type_string_by_option_name( PPW_Constants::RECAPTCHA_API_KEY, PPW_Constants::EXTERNAL_OPTIONS );

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}

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/**

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* Get recaptcha v3 API secret.

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*

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* @return string

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*/

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public function get_recaptcha_v3_api_secret() {

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return ppw_core_get_setting_type_string_by_option_name( PPW_Constants::RECAPTCHA_API_SECRET, PPW_Constants::EXTERNAL_OPTIONS );

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}

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/**

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* Get recaptcha v2 API key.

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*

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* @return string

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*/

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public function get_recaptcha_v2_api_key() {

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return ppw_core_get_setting_type_string_by_option_name( PPW_Constants::RECAPTCHA_V2_CHECKBOX_API_KEY, PPW_Constants::EXTERNAL_OPTIONS );

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}

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/**

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* Get recaptcha v2 API secret.

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*

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* @return string

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*/

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public function get_recaptcha_v2_api_secret() {

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return ppw_core_get_setting_type_string_by_option_name( PPW_Constants::RECAPTCHA_V2_CHECKBOX_API_SECRET, PPW_Constants::EXTERNAL_OPTIONS );

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}

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/**

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* Get recaptcha type.

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*

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* @return string

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*/

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public function get_recaptcha_type() {

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$recaptcha_type = ppw_core_get_setting_type_string_by_option_name( PPW_Constants::RECAPTCHA_TYPE, PPW_Constants::EXTERNAL_OPTIONS );

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return $recaptcha_type ? $recaptcha_type : self::RECAPTCHA_V3_TYPE;

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}

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/**

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* Get password types selected.

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*

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* @return string[]

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*/

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public function get_password_types() {

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$password_types = ppw_core_get_setting_type_array_by_option_name( PPW_Constants::RECAPTCHA_PASSWORD_TYPES, PPW_Constants::EXTERNAL_OPTIONS );

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return $password_types ? $password_types : array( 'single' );

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}

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/**

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* Using single recaptcha

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*

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* @return bool

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*/

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public function using_single_recaptcha() {

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return $this->using_recaptcha() && in_array( self::SINGLE_PASSWORD, $this->get_password_types() );

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}

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/**

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* Using sitewide recaptcha

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*

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* @return bool

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*/

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public function using_sitewide_recaptcha() {

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return $this->using_recaptcha() && in_array( self::SITEWIDE_PASSWORD, $this->get_password_types() );

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}

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/**

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* Using sitewide recaptcha

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*

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* @return bool

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*/

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public function using_pcp_recaptcha() {

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return $this->using_recaptcha() && in_array( self::PCP_PASSWORD, $this->get_password_types() );

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}

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/**

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* Load recaptcha v2 javascript.

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*/

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public function load_recaptcha_v2_js() {

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ob_start();

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?>

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<script src="https://www.google.com/recaptcha/api.js" async defer></script>

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<?php

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echo ob_get_clean(); // phpcs:ignore -- we cannot escape ob_start ob_get_clean(), there are no variable to escape in statement above

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}

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/**

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* Load recaptcha v3 javascript.

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*/

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public function load_recaptcha_v3_js() {

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$recaptcha_key = $this->get_recaptcha_v3_api_key();

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ob_start();

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?>

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<script src="https://www.google.com/recaptcha/api.js?render=<?php echo esc_attr( $recaptcha_key ); ?>"></script>

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<script>

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grecaptcha.ready(function () {

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grecaptcha.execute('<?php echo esc_attr( $recaptcha_key ); ?>', {action: 'enter_password'}).then(function (token) {

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var recaptchaResponse = document.getElementById('ppwRecaptchaResponse');

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recaptchaResponse.value = token;

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});

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});

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</script>

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<?php

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echo ob_get_clean(); // phpcs:ignore -- we already escape the $recaptcha_key above

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}

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[361] Fix | Delete

/**

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* Verify google recaptcha V3.

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*

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* @param string $recaptcha_response Recaptcha response.

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*

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* @return array

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*/

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public function verify_recaptcha( $recaptcha_response ) {

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$default = array(

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'success' => false,

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'message' => '',

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);

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if ( ! $recaptcha_response ) {

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return $default;

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}

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$secret = $this->get_setting_api_secret();

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if ( ! $secret ) {

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return $default;

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}

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$response = wp_remote_post(

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'https://www.google.com/recaptcha/api/siteverify',

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array(

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'method' => 'POST',

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'timeout' => 45,

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'redirection' => 5,

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'httpversion' => '1.0',

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'blocking' => true,

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'headers' => array(),

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'body' => array(

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'secret' => $secret,

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'response' => $recaptcha_response,

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),

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'cookies' => array(),

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)

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);

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if ( is_wp_error( $response ) ) {

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return $default;

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}

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$body = wp_remote_retrieve_body( $response );

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$body = json_decode( $body );

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// Whether this request was a valid reCAPTCHA token for your site.

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$success = isset( $body->success ) && $body->success;

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$external = true;

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if ( $this->get_recaptcha_type() === self::RECAPTCHA_V3_TYPE ) {

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$limit_score = $this->get_limit_score();

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// The score for this request (0.0 - 1.0) 1.0 is very likely a good interaction, 0.0 is very likely a bot.

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$score = isset( $body->score ) ? (double) $body->score : 0;

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$external = $score > $limit_score;

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}

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$default['success'] = $success && $external;

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return $default;

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}

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[421] Fix | Delete

/**

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* Load PPWPEA api key.

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*

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* @param string $key Recaptcha API key.

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*

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* @return string

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*/

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public function get_ppwpea_recaptcha_v2_api_key( $key ) {

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return $this->get_recaptcha_v2_api_key();

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}

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[432] Fix | Delete

/**

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* Load PPWPEA api secret.

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*

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* @param string $secret Recaptcha API secret.

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*

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* @return string

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*/

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public function get_ppwpea_recaptcha_v2_api_secret( $secret ) {

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return $this->get_recaptcha_v2_api_secret();

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}

[442] Fix | Delete

[443] Fix | Delete

public function maybe_load_sitewide_recaptcha_js() {

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

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return;

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}

[447] Fix | Delete

[448] Fix | Delete

$this->add_recaptcha_to_head();

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}

[450] Fix | Delete

[451] Fix | Delete

/**

[452] Fix | Delete

* Add recaptcha to head.

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*/

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public function add_recaptcha_to_head() {

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$recaptcha_type = $this->get_recaptcha_type();

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switch ( $recaptcha_type ) {

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case self::RECAPTCHA_V3_TYPE:

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$this->load_recaptcha_v3_js();

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break;

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case self::RECAPTCHA_V2_CHECKBOX_TYPE:

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case self::RECAPTCHA_V2_INVISIBLE_TYPE:

[462] Fix | Delete

$this->load_recaptcha_v2_js();

[463] Fix | Delete

break;

[464] Fix | Delete

}

[465] Fix | Delete

}

[466] Fix | Delete

[467] Fix | Delete

/**

[468] Fix | Delete

* Add recaptcha input below sitewide form.

[469] Fix | Delete

*/

[470] Fix | Delete

public function maybe_add_recaptcha_input_below_sitewide_form() {

[471] Fix | Delete

$recaptcha_input = $this->get_recaptcha_input();

[472] Fix | Delete

if ( ! empty( $recaptcha_input ) ) {

[473] Fix | Delete

echo $recaptcha_input;

[474] Fix | Delete

}

[475] Fix | Delete

}

[476] Fix | Delete

[477] Fix | Delete

/**

[478] Fix | Delete

* Get recaptcha input.

[479] Fix | Delete

*

[480] Fix | Delete

* @return string

[481] Fix | Delete

*/

[482] Fix | Delete

public function get_recaptcha_input() {

[483] Fix | Delete

switch ( $this->get_recaptcha_type() ) {

[484] Fix | Delete

case PPW_Recaptcha::RECAPTCHA_V2_CHECKBOX_TYPE:

[485] Fix | Delete

$site_key = $this->get_recaptcha_v2_api_key();

[486] Fix | Delete

[487] Fix | Delete

return '<div class="ppw-recaptcha g-recaptcha" data-sitekey="' . $site_key . '"></div>';

[488] Fix | Delete

default:

[489] Fix | Delete

return '<input type="hidden" name="g-recaptcha-response" id="ppwRecaptchaResponse" />';

[490] Fix | Delete

}

[491] Fix | Delete

}

[492] Fix | Delete

[493] Fix | Delete

/**

[494] Fix | Delete

* Customize sitewide css.

[495] Fix | Delete

*/

[496] Fix | Delete

public function customize_sitewide_css() {

[497] Fix | Delete

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

[498] Fix | Delete

return;

[499] Fix | Delete