FacetWP - pull in comment data

functions.php

<?php
add_filter( 'facetwp_indexer_row_data', function( $rows, $params ) {

    /* index the comment ratings */
    if ( 'comment_rating' == $params['facet']['source'] ) {
        $post_id = (int) $params['defaults']['post_id'];
        $comments = get_comments( [ 'post_id' => $post_id ] );

        foreach ( $comments as $comment ) {
            $new_row = $params['defaults'];
            $new_row['facet_value'] = $comment->comment_content;
            $new_row['facet_display_value'] = $comment->comment_content;
            $rows[] = $new_row;
        }
    }

    /* index the comment_authors */
    elseif ( 'comment_author' == $params['facet']['source'] ) {
        $post_id = (int) $params['defaults']['post_id'];
        $comments = get_comments( [ 'post_id' => $post_id ] );

        foreach ( $comments as $comment ) {
            $new_row = $params['defaults'];
            $new_row['facet_value'] = $comment->comment_author;
            $new_row['facet_display_value'] = $comment->comment_author;
            $rows[] = $new_row;
        }
    }
    return $rows;
}, 10, 2 );