package org.jtheque.core.managers.view.impl.models;

 /*

  * This file is part of JTheque.

  *

  * JTheque is free software: you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation, either version 3 of the License.

  *

  * JTheque is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  *

  * You should have received a copy of the GNU General Public License

  * along with JTheque.  If not, see <http://www.gnu.org/licenses/>.

  */

 import org.jtheque.core.managers.Managers;

 import org.jtheque.core.managers.message.IMessageManager;

 import org.jtheque.core.managers.message.Message;

 import org.jtheque.utils.bean.IntDate;

 import org.jtheque.utils.collections.CollectionUtils;

 import java.util.ArrayList;

 import java.util.ListIterator;

 /**

  * A model for the messages view.

  *

  * @author Baptiste Wicht

  */

 public final class MessageModel implements IMessageModel {

     private final IMessageManager manager;

     private final Message defaultMessage;

     private final ListIterator<Message> iterator;

     /**

      * Construct a new MessageModel.

      */

     public MessageModel() {

         super();

         manager = Managers.getManager(IMessageManager.class);

         iterator = new ArrayList<Message>(manager.getMessages()).listIterator();

         defaultMessage = new Message();

         defaultMessage.setDate(IntDate.today());

         defaultMessage.setId(-1);

         defaultMessage.setSource("");

         defaultMessage.setMessage("");

         defaultMessage.setTitle("");

     }

     @Override

     public Message getNextMessage() {

         if (!iterator.hasNext()) {

             CollectionUtils.goToFirst(iterator);

         }

         return manager.getMessages().isEmpty() ? defaultMessage : iterator.next();

     }

     @Override

     public Message getCurrentMessage() {

         if (!iterator.hasPrevious()) {

             CollectionUtils.goToLast(iterator);

         }

         return manager.getMessages().isEmpty() ? defaultMessage : iterator.previous();

     }

     @Override

     public Message getPreviousMessage() {

         if (!iterator.hasNext()) {

             CollectionUtils.goToFirst(iterator);

         }

         return manager.getMessages().isEmpty() ? defaultMessage : iterator.next();

     }

     @Override

     public boolean isDefaultMessage() {

         return manager.getMessages().isEmpty();

     }

 }