/*
 * BookmarkServlet.java
 *
 * Version: $Revision: $
 *
 * Date: $Date: $
 *
 * Copyright (c) 2007, Hewlett-Packard Company and Massachusetts
 * Institute of Technology.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the Hewlett-Packard Company nor the name of the
 * Massachusetts Institute of Technology nor the names of their
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package org.dspace.app.webui.servlet;

import java.io.IOException;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.dspace.authorize.AuthorizeException;
import org.dspace.core.Context;
import org.dspace.content.Item;
import org.dspace.eperson.BookmarkManager;
import org.dspace.app.webui.util.JSPManager;

/**
 * Servlet for constructing the components of the "My DSpace" page. Based on the work of SubscribeServlet.java
 *
 * @author Desmond Elliott
 * @version $Revision: $
 */
public class BookmarkServlet extends DSpaceServlet
{
    /** Logger */
    private static Logger log = Logger.getLogger(BookmarkServlet.class);

    protected void doDSGet(Context context, HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException,
            SQLException, AuthorizeException
    {
        // Simply show list of bookmarks
        showBookmarks(context, request, response, false);
    }

    protected void doDSPost(Context context, HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException,
            SQLException, AuthorizeException
    {

    }

    /**
     * Show the list of bookmarks
     *
     * @param context
     *            DSpace context
     * @param request
     *            HTTP request
     * @param response
     *            HTTP response
     * @param updated
     *            if <code>true</code>, write a message indicating that
     *            updated bookmarks have been stored
     */
    private void showBookmarks(Context context, HttpServletRequest request,
            HttpServletResponse response, boolean updated)
            throws ServletException, IOException, SQLException
    {
        String tag = request.getParameter("tag"); // to allow restriction to a given tag
        String users = request.getParameter("allusers"); // to allow restriction to a given tag
        boolean allUsers = (users != null) && ("on".equalsIgnoreCase(users));

        // Bookmarked items
        Item[] bookmarks = null;
        if ((tag == null) || "".equals(tag)) {
            if (allUsers) bookmarks = null;
            else bookmarks = BookmarkManager.getBookmarks(context, context.getCurrentUser());
        }
        else {
            if (allUsers) bookmarks = BookmarkManager.getBookmarks(context, tag);
            else bookmarks = BookmarkManager.getBookmarks(context, context.getCurrentUser(), tag);
            request.setAttribute("tag", tag);
        }
        request.setAttribute("allusers", new Boolean(allUsers));
        request.setAttribute("bookmarks", bookmarks);
        request.setAttribute("updated", new Boolean(updated));

        JSPManager.showJSP(request, response, "/mydspace/bookmarks.jsp");

    }
}