/**
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE and NOTICE files at the root of the source
 * tree and available online at
 *
 * http://www.dspace.org/license/
 */
package org.dspace.app.webui.servlet.admin;

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

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

import org.dspace.app.webui.servlet.DSpaceServlet;
import org.dspace.app.webui.util.JSPManager;
import org.dspace.app.webui.util.UIUtil;
import org.dspace.authorize.AuthorizeException;
import org.dspace.core.Context;
import org.dspace.eperson.EPerson;

/**
 * Servlet browsing through e-people and selecting them
 * 
 * @author Robert Tansley
 * @version $Revision$
 */
public class EPersonListServlet extends DSpaceServlet
{
	protected void doDSPost(Context context, HttpServletRequest request, 
			HttpServletResponse response) throws ServletException, IOException, 
			SQLException, AuthorizeException 
	{
		doDSGet(context, request, response);
	}

	protected void doDSGet(Context context, HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException,
            SQLException, AuthorizeException
    {
        // Are we for selecting a single or multiple epeople?
        boolean multiple = UIUtil.getBoolParameter(request, "multiple");

        // What are we sorting by. Lastname is default
        int sortBy = EPerson.LASTNAME;

        String sbParam = request.getParameter("sortby");

        if ((sbParam != null) && sbParam.equals("lastname"))
        {
            sortBy = EPerson.LASTNAME;
        }
        else if ((sbParam != null) && sbParam.equals("email"))
        {
            sortBy = EPerson.EMAIL;
        }
        else if ((sbParam != null) && sbParam.equals("id"))
        {
            sortBy = EPerson.ID;
        }
        else if ((sbParam != null) && sbParam.equals("language"))
        {
            sortBy = EPerson.LANGUAGE;
        }

        // What's the index of the first eperson to show? Default is 0
        int first = UIUtil.getIntParameter(request, "first");
        int offset = UIUtil.getIntParameter(request, "offset");
        if (first == -1)
        {
            first = 0;
        }
        if (offset == -1)
        {
            offset = 0;
        }
        

        EPerson[] epeople;
        String search = request.getParameter("search");
        if (search != null && !search.equals(""))
        {
            epeople = EPerson.search(context, search);
            request.setAttribute("offset", Integer.valueOf(offset));
        }
        else
        {
            // Retrieve the e-people in the specified order
            epeople = EPerson.findAll(context, sortBy);
            request.setAttribute("offset", Integer.valueOf(0));
        }        
        
        // Set attributes for JSP
        request.setAttribute("sortby", Integer.valueOf(sortBy));
        request.setAttribute("first", Integer.valueOf(first));
        request.setAttribute("epeople", epeople);
        request.setAttribute("search", search);
        
        if (multiple)
        {
            request.setAttribute("multiple", Boolean.TRUE);
        }

        JSPManager.showJSP(request, response, "/tools/eperson-list.jsp");
    }
}