cx-newsletter/activities/2-dashboard_activity.php

<?php

namespace cx_newsletter;

class dashboard_activity
extends activity {
    public function show_after_button() : null {
        return null;
    }

    public function get_site_template_name() : string {
        return 'dashboard';
    }

    public function process() : self {
        $messages_mapper = new messages_mapper(
            $this->get_database(),
            $this->get_tables()
        );

        $customers_mapper = new customers_mapper(
            $this->get_database(),
            $this->get_tables()
        );

        $this->set('messages_count', $messages_mapper->count());
        $this->set('customers_count', $customers_mapper->count());

        $messages_link = \menu_page_url(
            'cx_newsletter_manage_messages', 
            false
        );
        
        $customers_link = \menu_page_url(
            'cx_newsletter_manage_customers', 
            false
        );
        
        $campaigns_link = \menu_page_url(
            'cx_newsletter_show_campaigns', 
            false
        );

        $this->set('manage_messages_link', $messages_link);
        $this->set('manage_customers_link', $customers_link);
        $this->set('show_campaigns_link', $campaigns_link);

        return $this;
    }
}