<?php

defined('ABSPATH') or exit;

$posts = get_posts([ 'post_type' => 'boxzilla-box' ]);

if (! empty($posts)) {
    foreach ($posts as $post) {
        $settings = get_post_meta($post->ID, 'boxzilla_options', true);

        if (! is_array($settings)) {
            continue;
        }

        // translate from days to hours
        $new_value = intval($settings['cookie']) * 24;

        // store in new location
        $settings['cookie'] = [
            'dismissed' => $new_value,
        ];
        update_post_meta($post->ID, 'boxzilla_options', $settings);
    }
}