28.java

if ((((notification.orderID == orderID)
  || (notification.customerID == customerID)
  || (eventIDs.contains(notification.eventID)) && (notification.type.toAllStaff || notification.type.toAllOrders))
  || (isAdmin && eventIDs.contains(notification.eventID))
  && (userID != notification.senderID || notification.senderID == null))) {
    send(notification);
}

//

boolean orderMatches = notification.orderID == orderID;
boolean customerMatches = notification.customerID == customerID;
boolean eventMatches = eventIDs.contains(notification.eventID);
boolean addressedToAll = notification.type.toAllStaff || notification.type.toAllOrders;
boolean shouldSendByEvent = eventMatches && (addressedToAll || isAdmin);
boolean senderIsNotReceiver = userID != notification.senderID || notification.senderID == null;
boolean notificationMatchesUser = senderIsNotReceiver && (orderMatches || customerMatches || shouldSendByEvent);

if (notificationMatchesUser) {
    send(notification);
}

//

  if (notificationMatchesUser(notification, isAdmin, orderID, customerID, eventIDs, userID)) {
    send(notification);
  }

// ...

boolean notificationMatchesUser(Notification notification, String orderID, String customerID, List<String> eventIDs, boolean isAdmin, String userID) {
  boolean orderMatches = notification.orderID == orderID;
  boolean customerMatches = notification.customerID == customerID;
  boolean eventMatches = eventIDs.contains(notification.eventID);
  boolean addressedToAll = notification.type.toAllStaff || notification.type.toAllOrders;
  boolean shouldSendByEvent = eventMatches && (addressedToAll || isAdmin);
  boolean senderIsNotReceiver = userID != notification.senderID || notification.senderID == null;
    
  return senderIsNotReceiver && (orderMatches || customerMatches || shouldSendByEvent);
}

//

  if (notificationMatchesUser(notification, context)) {
    send(notification);
  }
  // ...

public class NotificationContext {
  private String orderID;
  private String customerID;
  private List<String> eventIDs;
  private String userID;
  private boolean isAdmin;
  // ...
}