// $Id: SilverpeasUploadPolicy.java 143  2010-01-27 11:01:06 +0100 (mer. 27 janv. 2010) ehsavoie $

 //

 // jupload - A file upload applet.

 // Copyright 2010 The JUpload Team

 //

 // Created: 2010-05-14

 // Creator: ehsavoie

 // Last modified: $Date: 2010-01-27 11:01:06 +0100 (mer. 27 janv. 2010) $

 //

 // This program 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 2 of the License, or (at your option) any later

 // version. This program 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 this program; if not, write to the Free Software Foundation, Inc.,

 // 675 Mass Ave, Cambridge, MA 02139, USA.

 package wjhk.jupload2.policies;

 import java.awt.Color;

 import java.awt.Component;

 import java.awt.Dimension;

 import java.awt.dnd.DropTargetDropEvent;

 import java.io.BufferedReader;

 import java.io.CharArrayWriter;

 import java.io.IOException;

 import java.io.InputStreamReader;

 import java.net.HttpURLConnection;

 import java.net.URL;

 import javax.swing.BoxLayout;

 import javax.swing.JLabel;

 import wjhk.jupload2.context.JUploadContext;

 import wjhk.jupload2.exception.JUploadException;

 import wjhk.jupload2.exception.JUploadExceptionTooBigFile;

 import wjhk.jupload2.gui.JUploadPanel;

 /**

  * Personnalised Policy with no button : use only DragAndDrop or Copy/Paste with automatic upload.<br/>

  * This is given as an example of a personnalized policy to show how JUpload is easy to adapt to your

  * specific needs.

  * <ul>

  *   <li>support for updating the background color.</li>

  *   <li>load an HTML page to be displayed as a message into the Applet: allows a 'richer' label.</li>

  *   <li>pre-validation of files size (when they are added, instead of before upload).</li>

  * </ul>

  * @author ehsavoie

  */

 public class SilverpeasUploadPolicy extends DefaultUploadPolicy {

   /** */

   public static final String MESSAGE_URL = "message";

   /** */

   public static final String COLOR_RED = "bgcolor_r";

   /** */

   public static final String COLOR_BLUE = "bgcolor_b";

   /** */

   public static final String COLOR_GREEN = "bgcolor_g";

   /** */

   public static final String COLOR_ALPHA = "bgcolor_a";

   /**

    * The JUpload constructor for this upload policy. Like all upload policies,

    * this constructor is called by the {@link UploadPolicyFactory}

    *

    * @param juploadContext

    * @throws JUploadException

    */

   public SilverpeasUploadPolicy(JUploadContext juploadContext)

           throws JUploadException {

     super(juploadContext);

     setNbFilesPerRequest(20);

     displayInfo("Loading SilverpeasUploadPolicy ...");

   }

   /**

    * This methods allow the upload policy to override the default disposition

    * of the components on the applet.

    *

    * @see UploadPolicy#addComponentsToJUploadPanel(JUploadPanel)

    */

   @Override

   public void addComponentsToJUploadPanel(JUploadPanel jUploadPanel) {

     // Set the global layout of the panel.

     displayInfo("Displaying SilverpeasUploadPolicy ...");

     jUploadPanel.getJComponent().setLayout(new BoxLayout(jUploadPanel.getJComponent(),

             BoxLayout.Y_AXIS));

     displayInfo("Accessing the message " + getMessage());

     Color color = new Color(getContext().getParameter(COLOR_RED, Color.LIGHT_GRAY.getRed()),

             getContext().getParameter(COLOR_GREEN, Color.LIGHT_GRAY.getGreen()),

             getContext().getParameter(COLOR_BLUE, Color.LIGHT_GRAY.getBlue()),

             getContext().getParameter(COLOR_ALPHA, Color.LIGHT_GRAY.getAlpha()));

     jUploadPanel.getJComponent().setBackground(color);

     jUploadPanel.getStatusLabel().setBackground(color);

     jUploadPanel.getUploadProgressBar().setBackground(color);

     jUploadPanel.getStatusLabel().setText(getMessage());

     jUploadPanel.getStatusLabel().setHorizontalAlignment(JLabel.CENTER);

     jUploadPanel.getStatusLabel().setVerticalAlignment(JLabel.CENTER);

     Dimension appletSize = getContext().getApplet().getSize();

     Dimension preferredAppletSize = getContext().getApplet().getPreferredSize();

     Dimension maxAppletSize = getContext().getApplet().getMaximumSize();

     jUploadPanel.getStatusLabel().setAlignmentX(Component.CENTER_ALIGNMENT);

     jUploadPanel.getStatusLabel().setAlignmentY(Component.CENTER_ALIGNMENT);

     jUploadPanel.getStatusLabel().setPreferredSize(new Dimension(preferredAppletSize.width, preferredAppletSize.height

             - 25));

     jUploadPanel.getStatusLabel().setSize(new Dimension(appletSize.width, appletSize.height - 25));

     jUploadPanel.getStatusLabel().setMaximumSize(new Dimension(maxAppletSize.width, maxAppletSize.height

             - 25));

     jUploadPanel.getStatusLabel().setMinimumSize(new Dimension(appletSize.width, appletSize.height

             - 25));

     jUploadPanel.getStatusLabel().setBackground(new Color(DEFAULT_ALBUM_ID));

     jUploadPanel.getJComponent().add(jUploadPanel.getStatusLabel());

     jUploadPanel.getJComponent().setAlignmentX(Component.CENTER_ALIGNMENT);

     jUploadPanel.getUploadProgressBar().setAlignmentX(Component.CENTER_ALIGNMENT);

     jUploadPanel.getUploadProgressBar().setAlignmentY(Component.CENTER_ALIGNMENT);

     jUploadPanel.getUploadProgressBar().setPreferredSize(

             new Dimension(preferredAppletSize.width, 20));

     jUploadPanel.getUploadProgressBar().setSize(new Dimension(appletSize.width, 20));

     jUploadPanel.getUploadProgressBar().setMaximumSize(new Dimension(maxAppletSize.width, 20));

     jUploadPanel.getUploadProgressBar().setMinimumSize(new Dimension(appletSize.width, 20));

     jUploadPanel.getUploadProgressBar().setStringPainted(false);

     jUploadPanel.getUploadProgressBar().setBorderPainted(false);

     // Then, add on the screen of the only component that is visible.

     jUploadPanel.getJComponent().add(jUploadPanel.getUploadProgressBar());

     // Now, we add the log window.

     jUploadPanel.showOrHideLogWindow();

     jUploadPanel.getJComponent().add(jUploadPanel.getJLogWindowPane());

     displayInfo("Displaying SilverpeasUploadPolicy ...");

   }

   /**

    * Loads the message from the specified URL.

    * @return the remote message.

    */

   protected String getMessage() {

     displayInfo("The message to be displayed is " + juploadContext.getParameter(MESSAGE_URL, ""));

     String urlContent = juploadContext.getParameter(MESSAGE_URL, "");

     String content = urlContent;

     HttpURLConnection connection = null;

     BufferedReader in = null;

     try {

       URL url = new URL(urlContent);

       connection = (HttpURLConnection) url.openConnection();

       connection.connect();

       in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));

       displayInfo("Getting data ...");

       CharArrayWriter text = new CharArrayWriter();

       int size = 0;

       char[] buffer = new char[8];

       while ((size = in.read(buffer)) >= 0) {

         text.write(buffer, 0, size);

       }

       content = text.toString();

     } catch (IOException ioex) {

       displayErr(ioex);

     } finally {

       try {

         if (in != null) {

           in.close();

         }

       } catch (IOException ex) {

         displayErr(ex);

       }

       connection.disconnect();

     }

     return content;

   }

   /**

    * Default reaction after a successful drop operation: no action.

    *

    * @see UploadPolicy#afterFileDropped(DropTargetDropEvent)

    */

   @Override

   public void afterFileDropped(DropTargetDropEvent dropEvent) {

     getContext().getUploadPanel().doStartUpload();

   }

   /**

    * @param description

    * @see UploadPolicy#sendDebugInformation(String, Exception) */

   @Override

   public void sendDebugInformation(String description, Exception exception) {

     if (exception instanceof JUploadExceptionTooBigFile) {

        getContext().getUploadPanel().getFilePanel().removeAll();

     }

     super.sendDebugInformation(description, exception);

   }

 }