Custom Post Type Archive by Date

Hi all

I need to apply this rewrite rule to multiple custom post types.

Currently it is only using one cpt “articles” but i need it to apply to “articles” & “newsletters”

How do i change the code to both these custom post types

/**
 * Custom post type specific rewrite rules
 * @return wp_rewrite Rewrite rules handled by WordPress
 */
function cpt_rewrite_rules($wp_rewrite)
{
    // Here we're hardcoding the CPT in, article in this case
    $rules = cpt_generate_date_archives('article', $wp_rewrite);
    $wp_rewrite->rules = $rules + $wp_rewrite->rules;
    return $wp_rewrite;
}
add_action('generate_rewrite_rules', 'cpt_rewrite_rules');

/**
 * Generate date archive rewrite rules for a given custom post type
 * @param  string $cpt slug of the custom post type
 * @return rules       returns a set of rewrite rules for WordPress to handle
 */
function cpt_generate_date_archives($cpt, $wp_rewrite)
{
    $rules = array();

    $post_type = get_post_type_object($cpt);
    $slug_archive = $post_type->has_archive;
    if ($slug_archive === false) {
        return $rules;
    }
    if ($slug_archive === true) {
        // Here's my edit to the original function, let's pick up
        // custom slug from the post type object if user has
        // specified one.
        $slug_archive = $post_type->rewrite['slug'];
    }

    $dates = array(
        array(
            'rule' => "([0-9]{4})/([0-9]{1,2})/([0-9]{1,2})",
            'vars' => array('year', 'monthnum', 'day')
        ),
        array(
            'rule' => "([0-9]{4})/([0-9]{1,2})",
            'vars' => array('year', 'monthnum')
        ),
        array(
            'rule' => "([0-9]{4})",
            'vars' => array('year')
        )
    );

    foreach ($dates as $data) {
        $query = 'index.php?post_type='.$cpt;
        $rule = $slug_archive.'/'.$data['rule'];

        $i = 1;
        foreach ($data['vars'] as $var) {
            $query.= '&'.$var.'='.$wp_rewrite->preg_index($i);
            $i++;
        }

        $rules[$rule."/?$"] = $query;
        $rules[$rule."/feed/(feed|rdf|rss|rss2|atom)/?$"] = $query."&feed=".$wp_rewrite->preg_index($i);
        $rules[$rule."/(feed|rdf|rss|rss2|atom)/?$"] = $query."&feed=".$wp_rewrite->preg_index($i);
        $rules[$rule."/page/([0-9]{1,})/?$"] = $query."&paged=".$wp_rewrite->preg_index($i);
    }
    return $rules;
}