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<?php

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/**

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* The Akismet integration module

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* @link https://akismet.com/development/api/

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wpcf7_include_module_file( 'akismet/service.php' );

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add_action(

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'wpcf7_init',

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'wpcf7_akismet_register_service',

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30, 0

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);

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/**

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* Registers the Akismet service.

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function wpcf7_akismet_register_service() {

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$integration = WPCF7_Integration::get_instance();

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$integration->add_service( 'akismet',

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WPCF7_Akismet::get_instance()

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);

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}

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add_filter( 'wpcf7_spam', 'wpcf7_akismet', 10, 2 );

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function wpcf7_akismet( $spam, $submission ) {

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if ( $spam ) {

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return $spam;

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}

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if ( ! wpcf7_akismet_is_available() ) {

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return false;

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}

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if ( ! $params = wpcf7_akismet_submitted_params() ) {

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return false;

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}

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$comment = array(

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'comment_type' => 'contact-form',

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'comment_author' => $params['author'],

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'comment_author_email' => $params['author_email'],

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'comment_author_url' => $params['author_url'],

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'comment_content' => $params['content'],

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'blog' => home_url(),

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'blog_lang' => get_locale(),

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'blog_charset' => get_option( 'blog_charset' ),

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'user_ip' => $submission->get_meta( 'remote_ip' ),

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'user_agent' => $submission->get_meta( 'user_agent' ),

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'referrer' => $_SERVER['HTTP_REFERER'] ?? '',

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);

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$datetime = date_create_immutable(

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'@' . $submission->get_meta( 'timestamp' )

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);

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if ( $datetime ) {

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$comment['comment_date_gmt'] = $datetime->format( DATE_ATOM );

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}

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if ( $permalink = get_permalink() ) {

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$comment['permalink'] = $permalink;

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}

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$server_vars = array_diff_key(

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$_SERVER,

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array_flip( array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' ) )

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);

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$comment = array_merge( $comment, $server_vars );

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$comment = apply_filters( 'wpcf7_akismet_parameters', $comment );

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if ( wpcf7_akismet_comment_check( $comment ) ) {

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$spam = true;

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$submission->add_spam_log( array(

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'agent' => 'akismet',

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'reason' => __( "Akismet returns a spam response.", 'contact-form-7' ),

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) );

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} else {

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$spam = false;

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}

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return $spam;

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}

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/**

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* Returns true if Akismet is active and has a valid API key.

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function wpcf7_akismet_is_available() {

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if ( is_callable( array( 'Akismet', 'get_api_key' ) ) ) {

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return (bool) Akismet::get_api_key();

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}

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return false;

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}

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/**

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* Returns an array of parameters based on the current form submission.

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* Returns false if Akismet is not active on the contact form.

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function wpcf7_akismet_submitted_params() {

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$akismet_tags = array_filter(

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wpcf7_scan_form_tags(),

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static function ( $tag ) {

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$akismet_option = $tag->get_option( 'akismet',

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'(author|author_email|author_url)',

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true

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);

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return (bool) $akismet_option;

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}

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);

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if ( ! $akismet_tags ) { // Akismet is not active on this contact form.

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return false;

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}

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$params = array(

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'author' => '',

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'author_email' => '',

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'author_url' => '',

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'content' => '',

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);

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foreach ( (array) $_POST as $key => $val ) {

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if ( '_wpcf7' == substr( $key, 0, 6 )

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or '_wpnonce' == $key ) {

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continue;

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}

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$vals = array_filter(

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wpcf7_array_flatten( $val ),

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static function ( $val ) {

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return '' !== trim( $val );

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}

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);

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if ( empty( $vals ) ) {

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continue;

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}

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if ( $tags = wpcf7_scan_form_tags( array( 'name' => $key ) ) ) {

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$tag = $tags[0];

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$akismet_option = $tag->get_option( 'akismet',

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'(author|author_email|author_url)',

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true

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);

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if ( 'author' === $akismet_option ) {

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$params['author'] = sprintf(

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'%s %s',

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$params['author'],

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implode( ' ', $vals )

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);

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continue;

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}

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if ( 'author_email' === $akismet_option

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and '' === $params['author_email'] ) {

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$params['author_email'] = $vals[0];

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continue;

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}

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if ( 'author_url' === $akismet_option

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and '' === $params['author_url'] ) {

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$params['author_url'] = $vals[0];

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continue;

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}

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$vals = array_filter(

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$vals,

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static function ( $val ) use ( $tag ) {

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if ( wpcf7_form_tag_supports( $tag->type, 'selectable-values' )

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and in_array( $val, $tag->labels ) ) {

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return false;

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} else {

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return true;

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}

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}

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);

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}

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if ( $vals ) {

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$params['content'] .= "\n\n" . implode( ', ', $vals );

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}

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}

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$params = array_map( 'trim', $params );

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return $params;

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}

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/**

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* Sends data to Akismet.

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* @param array $comment Submission and environment data.

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* @return bool True if Akismet called it spam, or false otherwise.

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function wpcf7_akismet_comment_check( $comment ) {

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$spam = false;

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$query_string = wpcf7_build_query( $comment );

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if ( is_callable( array( 'Akismet', 'http_post' ) ) ) {

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$response = Akismet::http_post( $query_string, 'comment-check' );

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} else {

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return $spam;

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}

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if ( 'true' == $response[1] ) {

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$spam = true;

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}

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if ( $submission = WPCF7_Submission::get_instance() ) {

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$submission->push( 'akismet', array(

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'comment' => $comment,

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'spam' => $spam,

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) );

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}

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return apply_filters( 'wpcf7_akismet_comment_check', $spam, $comment );

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}

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add_filter( 'wpcf7_posted_data', 'wpcf7_akismet_posted_data', 10, 1 );

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/**

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* Removes Akismet-related properties from the posted data.

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* This does not affect the $_POST variable itself.

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* @link https://plugins.trac.wordpress.org/browser/akismet/tags/5.0/_inc/akismet-frontend.js

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function wpcf7_akismet_posted_data( $posted_data ) {

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if ( wpcf7_akismet_is_available() ) {

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$posted_data = array_diff_key(

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$posted_data,

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array(

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'ak_bib' => '',

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'ak_bfs' => '',

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'ak_bkpc' => '',

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'ak_bkp' => '',

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'ak_bmc' => '',

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'ak_bmcc' => '',

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'ak_bmk' => '',

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'ak_bck' => '',

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'ak_bmmc' => '',

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'ak_btmc' => '',

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'ak_bsc' => '',

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'ak_bte' => '',

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'ak_btec' => '',

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'ak_bmm' => '',

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)

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);

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}

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return $posted_data;

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}

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add_filter(

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'wpcf7_default_template',

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'wpcf7_akismet_default_template',

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10, 2

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);

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function wpcf7_akismet_default_template( $template, $prop ) {

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if ( ! wpcf7_akismet_is_available() ) {

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return $template;

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}

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if ( 'form' === $prop ) {

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$template = str_replace(

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array(

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'[text* your-name ',

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'[email* your-email ',

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array(

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'[text* your-name akismet:author ',

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'[email* your-email akismet:author_email ',

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$template

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);

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$privacy_notice = sprintf( '%s %s',

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__( "This form uses Akismet to reduce spam.", 'contact-form-7' ),

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wpcf7_link(

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'https://akismet.com/privacy/',

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__( "Learn how your data is processed.", 'contact-form-7' ),

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array(

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'target' => '_blank',

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'rel' => 'nofollow noopener',

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)

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)

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);

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$template .= "\n\n" . $privacy_notice;

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}

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return $template;

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}

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