Lesson Reply Notification

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
*/

apply_filters( 'wp_mail_from', 'david@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;

            ob_start();
            ?>
            <p><?php printf(__('Muy buenas %s', 'scv'), $parent->comment_author) ?>,</p>

            <p><?php printf(__('%s ha respondido a tu duda de la lección: ', 'scv'), $comment->comment_author) ?>

            <a href="<?php echo get_permalink($parent->comment_post_ID) ?>"><?php echo get_the_title($parent->comment_post_ID) ?></a></p>

            <p><em><?php echo esc_html($comment->comment_content) ?></em></p>

            <p><a href="<?php echo get_comment_link($parent->comment_ID) ?>"><?php echo __('Ver respuesta dentro del sitio.', 'scv') ?></a></p>
            <?php
            $body = ob_get_clean();

            $subject = __( '[Club SiliCodeValley] Nueva respuesta a tu duda', 'scv' );
            $headers = array('Content-Type: text/html; charset=UTF-8');

            wp_mail($email, $subject, $body, $headers );

        }

    }
}