[site-reviews] set the assigned_posts value from an URL parameter

/**
 * Set the assigned_posts value from an URL parameter (?assigned_post=)
 * Example: https://domain.com?assigned_post=4
 * @param array $fields
 * @return array
 */
add_filter('site-reviews/review-form/fields/hidden', function ($fields) {
    if (!isset($fields['assigned_posts']) || !isset($fields['assigned_posts']->field)) {
        return $fields;
    }
    if ($postId = intval(filter_input(INPUT_GET, 'assigned_post'))) {
        $fields['assigned_posts']->field['value'] = $postId;
    }
    return $fields;
});