Enfold Font Uploader

add_action('acf/save_post', 'res_add_font_to_avia', 5);
function res_add_font_to_avia($post_id)
{
    if (isset($_POST['acf']['field_62f356532c89d'])) {
        $font_uploader = new avia_font_manager();

        $old_font = get_field('theme_options_font', 'option');
        if (is_array($old_font)) {
            $old_font_ID = (int)$old_font['ID'];
        } else {
            $old_font_ID = (int)$old_font;
        }
        $new_font_ID = (int)$_POST['acf']['field_62f356532c89d'];
        if ($new_font_ID) {
            // check if old font and new font are equal
            if ($new_font_ID === $old_font_ID) return;

            // add new font
            $font_name = res_upload_font($new_font_ID, $font_uploader);

            // Update font title to have reference for deletion
            $font = array(
                'ID'         => $new_font_ID,
                'post_title' => $font_name,
            );
            wp_update_post($font);
        } else {
            // Delete font folder and font
            $font_name = get_the_title($old_font_ID);
            wp_delete_attachment($old_font_ID);
            if ($font_name) {
                $new_name = trailingslashit($font_uploader->paths['fontdir']) . $font_name;
                $font_uploader->delete_folder($new_name);

                $fonts = get_option('avia_builder_fonts');
                if (isset($fonts[$font_name])) {
                    unset($fonts[$font_name]);
                    update_option('avia_builder_fonts', $fonts);
                }
            }
        }
    }
}

function res_upload_font($attachment_id, $font_uploader)
{
    if (!$attachment_id) return '';

    $path = realpath(get_attached_file($attachment_id));
    $unzipped = $font_uploader->zip_flatten($path, array('\.eot', '\.svg', '\.ttf', '\.woff', '\.woff2', '\.json'));

    if ($unzipped) {
        $font_uploader->create_config();
    }

    if ($font_uploader->font_name == 'unknown') {
        $font_uploader->delete_folder($font_uploader->paths['tempdir']);
        exit('Was not able to retrieve the Font name from your Uploaded Folder');
    }

    return $font_uploader->font_name;
}