package org.jtheque.core.managers.message;

 /*

  * 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.utils.file.ReadingException;

 import org.jtheque.core.utils.file.XMLException;

 import org.jtheque.core.utils.file.XMLReader;

 import org.jtheque.utils.bean.IntDate;

 import org.jtheque.utils.io.FileUtils;

 import java.net.MalformedURLException;

 import java.net.URL;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.List;

 /**

  * @author Baptiste Wicht

  */

 final class MessageFileReader {

     /**

      * Construct a new MessageFileReader. This constructor is private because

      * all methods are static.

      */

     private MessageFileReader() {

         super();

     }

     /**

      * Read a messages file and return it.

      *

      * @param strUrl The URL of the file.

      * @return The versions file.

      * @throws ReadingException Thrown when an error occurs during the reading.

      */

     public static MessageFile readMessagesFile(String strUrl) throws ReadingException {

         URL url;

         try {

             url = new URL(strUrl);

         } catch (MalformedURLException e) {

             throw new ReadingException("Unable to get the messages. ", e);

         }

         return readMessagesFile(url);

     }

     /**

      * Read a messages file and return it.

      *

      * @param url The URL of the file.

      * @return The messages file.

      * @throws ReadingException Thrown when an error occurs during the reading.

      */

     private static MessageFile readMessagesFile(URL url) throws ReadingException {

         MessageFile messageFile = new MessageFile();

         XMLReader reader = new XMLReader();

         List<Message> messages = new ArrayList<Message>(10);

         try {

             reader.openURL(url);

             messageFile.setSource(reader.readString("source", reader.getRootElement()));

             for (Object currentNode : reader.getNodes("messages/message", reader.getRootElement())) {

                 Message message = new Message();

                 message.setId(reader.readInt("id", currentNode));

                 message.setDate(new IntDate(reader.readInt("date", currentNode)));

                 message.setTitle(reader.readString("title", currentNode));

                 message.setMessage(reader.readString("message", currentNode));

                 message.setSource(messageFile.getSource());

                 messages.add(message);

             }

             Collections.sort(messages);

             messageFile.setMessages(messages);

             FileUtils.close(reader);

         } catch (XMLException e) {

             throw new ReadingException("Unable to read message's file. ", e);

         }

         return messageFile;

     }

 }