package class8_2_PhoneBook.phonebook;//package pbook;

// top level policy operations for use from user interface
public class Handler {
   protected History history = new History();
   protected PhoneBook pb = new PhoneBook();

   // add a new phone entry
   public void addEntry(String name, String phone_number) {
      history.doCommand(new AddCommand(pb, new Entry(name, phone_number)));
   }

   // remove an existing entry; does nothing if entry not there
   public void removeEntry(String name) {
      history.doCommand(new RemoveCommand(pb, name));
   }

   // return the history
   public History getHistory() {
      return history;
   }

   // return the phone book
   public PhoneBook getPhoneBook() {
      return pb;
   }

   public void undo() {
      history.undo();
   }

   public void redo() {
      history.redo();
   }

}