public static function order_contains_sponsorship($order)
 {
     if (!is_object($order)) {
         $order = new WC_Order($order);
     }
     $contains_contribution = false;
     foreach ($order->get_items() as $order_item) {
         if (WC_Sponsorship_Product::is_sponsorship_contribution_level($order_item['product_id'])) {
             $contains_contribution = true;
             break;
         }
     }
     return $contains_contribution;
 }
 function track_order($order)
 {
     if (!is_object($order)) {
         $order = new WC_Order($order);
     }
     $projects = array();
     foreach ($order->get_items() as $order_item) {
         if (WC_Sponsorship_Product::is_sponsorship_contribution_level($order_item['product_id'])) {
             $cl = get_post($order_item['product_id']);
             if (!in_array($cl->post_parent, $projects)) {
                 $projects[] = $cl->post_parent;
             }
         }
     }
     foreach ($projects as $project) {
         update_post_meta($order->id, '_sponsorship_project', $project);
     }
 }
 public static function check_project_duedate($project_id)
 {
     $data = get_post_meta($project_id, '_sponsorship', true);
     $days_left = 0;
     if ($data['end']['date']) {
         $now = strtotime(date("Y-m-d"));
         // or your date as well
         $then = strtotime($data['end']['date']);
         $datediff = $then - $now;
         // add 1 additional day so if current day, it is not the last day
         $days_left = floor($datediff / (60 * 60 * 24)) + 1;
         if ($days_left < 0) {
             $days_left = 0;
         }
     }
     if (!$days_left) {
         $days_left = false;
         // cancel all orders
         WC_Sponsorship_Product::cancel_project_orders($project_id);
     } else {
         $days_left = true;
     }
     return $days_left;
 }
 function get_wc_sponsorship_sidebar($name)
 {
     global $product;
     if (is_single() && WC_Sponsorship_Product::is_sponsorship($product) && 'Sponsorship Sidebar' != $name) {
         load_template($this->plugin_path() . '/classes/class-wc-sponsorship-sidebar.php', true);
         static $class = "wc-sponsorship-hidden";
         $this->wc_sponsorship_sidebar_class_replace($class);
     }
 }