Lesson Reply Notification 6

lessons-reply-notification.php

<?php
/*
Plugin Name: Lesson Reply Notification
Description: Send and email to the student, when he receives a response
Author: David Perálvarez
Version: 1.0
Author URI: https://silicodevalley.com
*/

add_action( 'wp_insert_comment', 'scv_comment_notification',  99, 2 );
function scv_comment_notification( $commentId, $comment ) {

    if (($comment->comment_approved == 1) && ($comment->comment_parent > 0)) {

        $parent = get_comment($comment->comment_parent);
        $email  = $parent->comment_author_email;

        // Check comments are from lessons
        $postId = $parent->comment_post_ID;
        $postType = get_post_type($postId);
        if($postType == 'lesson'){

            // Parent comment author == new comment author
            // In this case, we don't send a notification.
            if ($email == $comment->comment_author_email) return false;
            
        }

    }
}