<?php

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/**

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* WPForms integration module

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*

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* Malicious user detection techniques available:

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*

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* 1. Zero Spam honeypot field

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* 2. Uses the David Walsh technique

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*

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* @package ZeroSpam

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*/

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namespace ZeroSpam\Modules\WPForms;

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// Security Note: Blocks direct access to the plugin PHP files.

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defined( 'ABSPATH' ) || die();

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/**

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* WPForms

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*/

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class WPForms {

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/**

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* Constructor

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*/

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public function __construct() {

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add_action( 'init', array( $this, 'init' ) );

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}

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/**

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* Fires after WordPress has finished loading but before any headers are sent.

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*/

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public function init() {

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add_filter( 'zerospam_setting_sections', array( $this, 'sections' ) );

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add_filter( 'zerospam_settings', array( $this, 'settings' ), 10, 1 );

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add_filter( 'zerospam_types', array( $this, 'types' ), 10, 1 );

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if (

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'enabled' === \ZeroSpam\Core\Settings::get_settings( 'verify_wpforms' ) &&

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\ZeroSpam\Core\Access::process()

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) {

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// Adds Zero Spam's honeypot field.

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add_action( 'wpforms_frontend_output', array( $this, 'honeypot' ), 10, 1 );

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// Load scripts.

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add_action( 'wpforms_frontend_output', array( $this, 'add_scripts' ) );

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// Processes the form.

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add_action( 'wpforms_process', array( $this, 'preprocess_submission' ), 10, 3 );

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}

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}

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/**

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* Adds Zero Spam's honeypot field.

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*/

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public function honeypot() {

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// @codingStandardsIgnoreLine

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echo \ZeroSpam\Core\Utilities::honeypot_field();

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}

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/**

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* Preprocess submission

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*

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* @param array $fields Sanitized entry field values/properties.

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* @param array $entry Original $_POST global.

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* @param array $form_data Form settings/data.

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*/

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public function preprocess_submission( $fields, $entry, $form_data ) {

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// @codingStandardsIgnoreLine

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$post = \ZeroSpam\Core\Utilities::sanitize_array( $_POST );

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// Get the error message.

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$error_message = \ZeroSpam\Core\Utilities::detection_message( 'wpforms_spam_message' );

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// Create the details array for logging & sharing data.

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$details = $fields;

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$details = array_merge( $details, $entry );

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$details = array_merge( $details, $form_data );

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$details['type'] = 'wpforms';

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// Begin validation checks.

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$validation_errors = array();

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// Check individual fields.

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if ( ! empty( $post['wpforms'] ) && ! empty( $post['wpforms']['fields'] ) ) {

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foreach ( $post['wpforms']['fields'] as $key => $field ) {

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if ( is_array( $field ) ) {

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foreach ( $field as $k => $value ) {

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if ( \ZeroSpam\Core\Utilities::is_email( $value ) && \ZeroSpam\Core\Utilities::is_email_domain_blocked( $value ) ) {

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// Email address found & is blocked.

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$validation_errors[] = 'blocked_email_domain';

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} else {

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// Check against disallowed list.

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if ( \ZeroSpam\Core\Utilities::is_disallowed( $value ) ) {

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$validation_errors[] = 'disallowed_list';

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}

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}

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}

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} elseif ( \ZeroSpam\Core\Utilities::is_email( $field ) && \ZeroSpam\Core\Utilities::is_email_domain_blocked( $field ) ) {

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// Email address found & is blocked.

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$validation_errors[] = 'blocked_email_domain';

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} else {

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// Check against disallowed list.

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if ( \ZeroSpam\Core\Utilities::is_disallowed( $field ) ) {

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$validation_errors[] = 'disallowed_list';

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}

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}

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}

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}

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// Check Zero Spam's honeypot field.

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$honeypot_field_name = \ZeroSpam\Core\Utilities::get_honeypot();

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// @codingStandardsIgnoreLine

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if ( isset( $post[ $honeypot_field_name ] ) && ! empty( $post[ $honeypot_field_name ] ) ) {

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// Failed the honeypot check.

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$details['failed'] = 'honeypot';

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$validation_errors[] = 'honeypot';

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}

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// Fire hook for additional validation (ex. David Walsh script).

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$errors = apply_filters( 'zerospam_preprocess_wpforms_submission', array(), $post, 'wpforms_spam_message' );

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if ( ! empty( $errors ) ) {

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foreach ( $errors as $key => $message ) {

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$validation_errors[] = str_replace( 'zerospam_', '', $key );

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}

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}

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if ( ! empty( $validation_errors ) ) {

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// Failed validations, log & send details if enabled.

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foreach ( $validation_errors as $key => $fail ) {

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$details['failed'] = $fail;

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// Log the detection if enabled.

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if ( 'enabled' === \ZeroSpam\Core\Settings::get_settings( 'log_blocked_wpforms' ) ) {

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\ZeroSpam\Includes\DB::log( 'wpforms', $details );

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}

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// Share the detection if enabled.

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if ( 'enabled' === \ZeroSpam\Core\Settings::get_settings( 'share_data' ) ) {

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do_action( 'zerospam_share_detection', $details );

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}

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}

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wpforms()->process->errors[ $form_data['id'] ]['header'] = $error_message;

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}

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}

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/**

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* Add to the detection types array

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*

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* @param array $types Array of available detection types.

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*/

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public function types( $types ) {

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$types['wpforms'] = array(

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'label' => __( 'WPForms', 'zero-spam' ),

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'color' => '#e27730',

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);

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return $types;

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}

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/**

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* Load the scripts

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*/

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public function add_scripts() {

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// Only add scripts to the appropriate pages.

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if ( 'enabled' === \ZeroSpam\Core\Settings::get_settings( 'davidwalsh' ) ) {

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wp_enqueue_script( 'zerospam-davidwalsh' );

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add_action(

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'wp_enqueue_scripts',

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function () {

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wp_add_inline_script( 'zerospam-davidwalsh', 'document.addEventListener("DOMContentLoaded", function() { jQuery(".wpforms-form").ZeroSpamDavidWalsh(); });' );

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}

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);

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}

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}

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/**

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* Admin setting sections

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*

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* @param array $sections Array of admin setting sections.

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*/

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public function sections( $sections ) {

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$sections['wpforms'] = array(

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'title' => __( 'WPForms', 'zero-spam' ),

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'icon' => 'modules/wpforms/icon-wpforms.svg',

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'supports' => array( 'honeypot', 'davidwalsh', 'email', 'words' ),

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);

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return $sections;

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}

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/**

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* Admin settings

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*

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* @param array $settings Array of available settings.

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*/

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public function settings( $settings ) {

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$options = get_option( 'zero-spam-wpforms' );

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$settings['verify_wpforms'] = array(

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'title' => __( 'Protect WPForms Submissions', 'zero-spam' ),

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'desc' => __( 'Protects & monitors WPForms submissions.', 'zero-spam' ),

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'section' => 'wpforms',

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'module' => 'wpforms',

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'type' => 'checkbox',

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'options' => array(

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'enabled' => false,

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),

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'value' => ! empty( $options['verify_wpforms'] ) ? $options['verify_wpforms'] : false,

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'recommended' => 'enabled',

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);

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$message = __( 'Your IP has been flagged as spam/malicious.', 'zero-spam' );

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$settings['wpforms_spam_message'] = array(

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'title' => __( 'Flagged Message', 'zero-spam' ),

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'desc' => __( 'Message displayed when a submission has been flagged.', 'zero-spam' ),

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'section' => 'wpforms',

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'module' => 'wpforms',

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'type' => 'text',

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'field_class' => 'large-text',

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'placeholder' => $message,

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'value' => ! empty( $options['wpforms_spam_message'] ) ? $options['wpforms_spam_message'] : $message,

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'recommended' => $message,

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);

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$settings['log_blocked_wpforms'] = array(

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'title' => __( 'Log Blocked WPForms Submissions', 'zero-spam' ),

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'section' => 'wpforms',

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'module' => 'wpforms',

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'type' => 'checkbox',

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'desc' => wp_kses(

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__( 'When enabled, stores blocked WPForms submissions in the database.', 'zero-spam' ),

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array( 'strong' => array() )

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),

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'options' => array(

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'enabled' => false,

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),

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'value' => ! empty( $options['log_blocked_wpforms'] ) ? $options['log_blocked_wpforms'] : false,

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'recommended' => 'enabled',

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);

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return $settings;

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}

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}

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