Save IP address with RSVP.

Author: mauteri

includes/core/classes/class-rsvp.php

@@ -227,10 +227,15 @@ public function save( int $user_id, string $status, int $anonymous = 0, int $gue
 		$args = array(
 			'comment_author_url' => get_author_posts_url( $user_id ),
 			'comment_post_ID'    => $post_id,
+			'comment_author_IP'  => '127.0.0.1',
 			'comment_type'       => self::COMMENT_TYPE,
 			'user_id'            => $user_id,
 		);
 
+		if ( ! empty( $_SERVER['REMOTE_ADDR'] ) && rest_is_ip_address( $_SERVER['REMOTE_ADDR'] ) ) {
+			$args['comment_author_IP'] = $_SERVER['REMOTE_ADDR'];
+		}
+
 		if ( empty( $rsvp ) ) {
 			$comment_id = wp_insert_comment( $args );
 		} else {