+// get the full comment history for a given comment, as an array in reverse chronological order
+function akismet_get_comment_history( $comment_id ) {
+
+ // failsafe for old WP versions
+ if ( !function_exists('add_comment_meta') )
+ return false;
+
+ $history = get_comment_meta( $comment_id, 'akismet_history', false );
+ usort( $history, 'akismet_cmp_time' );
+ return $history;
+}
+
+function akismet_cmp_time( $a, $b ) {
+ return $a['time'] > $b['time'] ? -1 : 1;
+}
+
+// this fires on wp_insert_comment. we can't update comment_meta when akismet_auto_check_comment() runs
+// because we don't know the comment ID at that point.
+function akismet_auto_check_update_meta( $id, $comment ) {
+ global $akismet_last_comment;
+
+ // failsafe for old WP versions
+ if ( !function_exists('add_comment_meta') )
+ return false;
+
+ if ( !isset( $akismet_last_comment['comment_author_email'] ) )
+ $akismet_last_comment['comment_author_email'] = '';
+
+ // wp_insert_comment() might be called in other contexts, so make sure this is the same comment
+ // as was checked by akismet_auto_check_comment
+ if ( is_object($comment) && !empty($akismet_last_comment) && is_array($akismet_last_comment) ) {
+ if ( isset($akismet_last_comment['comment_post_ID']) && intval($akismet_last_comment['comment_post_ID']) == intval($comment->comment_post_ID)
+ && $akismet_last_comment['comment_author'] == $comment->comment_author
+ && $akismet_last_comment['comment_author_email'] == $comment->comment_author_email ) {
+ // normal result: true or false
+ if ( $akismet_last_comment['akismet_result'] == 'true' ) {
+ update_comment_meta( $comment->comment_ID, 'akismet_result', 'true' );
+ akismet_update_comment_history( $comment->comment_ID, __('Akismet caught this comment as spam'), 'check-spam' );
+ if ( $comment->comment_approved != 'spam' )
+ akismet_update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s'), $comment->comment_approved), 'status-changed'.$comment->comment_approved );
+ } elseif ( $akismet_last_comment['akismet_result'] == 'false' ) {
+ update_comment_meta( $comment->comment_ID, 'akismet_result', 'false' );
+ akismet_update_comment_history( $comment->comment_ID, __('Akismet cleared this comment'), 'check-ham' );
+ if ( $comment->comment_approved == 'spam' ) {
+ if ( wp_blacklist_check($comment->comment_author, $comment->comment_author_email, $comment->comment_author_url, $comment->comment_content, $comment->comment_author_IP, $comment->comment_agent) )
+ akismet_update_comment_history( $comment->comment_ID, __('Comment was caught by wp_blacklist_check'), 'wp-blacklisted' );
+ else
+ akismet_update_comment_history( $comment->comment_ID, sprintf( __('Comment status was changed to %s'), $comment->comment_approved), 'status-changed-'.$comment->comment_approved );
+ }
+ // abnormal result: error
+ } else {
+ update_comment_meta( $comment->comment_ID, 'akismet_error', time() );
+ akismet_update_comment_history( $comment->comment_ID, sprintf( __('Akismet was unable to check this comment (response: %s), will automatically retry again later.'), substr($akismet_last_comment['akismet_result'], 0, 50)), 'check-error' );
+ }
+
+ // record the complete original data as submitted for checking
+ if ( isset($akismet_last_comment['comment_as_submitted']) )
+ update_comment_meta( $comment->comment_ID, 'akismet_as_submitted', $akismet_last_comment['comment_as_submitted'] );
+ }
+ }
+}
+
+add_action( 'wp_insert_comment', 'akismet_auto_check_update_meta', 10, 2 );
+
+
+function akismet_auto_check_comment( $commentdata ) {
+ global $akismet_api_host, $akismet_api_port, $akismet_last_comment;
+
+ $comment = $commentdata;
+ $comment['user_ip'] = akismet_get_ip_address();
+ $comment['user_agent'] = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null;
+ $comment['referrer'] = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null;
+ $comment['blog'] = get_option('home');
+ $comment['blog_lang'] = get_locale();
+ $comment['blog_charset'] = get_option('blog_charset');
+ $comment['permalink'] = get_permalink($comment['comment_post_ID']);
+
+ if ( !empty( $comment['user_ID'] ) ) {
+ $comment['user_role'] = akismet_get_user_roles( $comment['user_ID'] );
+ }
+
+ $akismet_nonce_option = apply_filters( 'akismet_comment_nonce', get_option( 'akismet_comment_nonce' ) );
+ $comment['akismet_comment_nonce'] = 'inactive';
+ if ( $akismet_nonce_option == 'true' || $akismet_nonce_option == '' ) {
+ $comment['akismet_comment_nonce'] = 'failed';
+ if ( isset( $_POST['akismet_comment_nonce'] ) && wp_verify_nonce( $_POST['akismet_comment_nonce'], 'akismet_comment_nonce_' . $comment['comment_post_ID'] ) )
+ $comment['akismet_comment_nonce'] = 'passed';
+
+ // comment reply in wp-admin
+ if ( isset( $_POST['_ajax_nonce-replyto-comment'] ) && check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment' ) )
+ $comment['akismet_comment_nonce'] = 'passed';
+
+ }
+
+ if ( akismet_test_mode() )
+ $comment['is_test'] = 'true';
+
+ foreach ($_POST as $key => $value ) {
+ if ( is_string($value) )
+ $comment["POST_{$key}"] = $value;
+ }
+
+ $ignore = array( 'HTTP_COOKIE', 'HTTP_COOKIE2', 'PHP_AUTH_PW' );
+
+ foreach ( $_SERVER as $key => $value ) {
+ if ( !in_array( $key, $ignore ) && is_string($value) )
+ $comment["$key"] = $value;
+ else
+ $comment["$key"] = '';
+ }
+
+ $post = get_post( $comment['comment_post_ID'] );
+ $comment[ 'comment_post_modified_gmt' ] = $post->post_modified_gmt;