source: trunk/www/views/trashcan/index.jsp @ 3550

<%-- $Id: index.jsp 3550 2007-07-05 11:18:28Z martin $
  ------------------------------------------------------------------
  Copyright (C) 2006 Nicklas Nordborg

  This file is part of BASE - BioArray Software Environment.
  Available at http://base.thep.lu.se/

  BASE 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.

  BASE 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., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA. 
  ------------------------------------------------------------------

  @author Nicklas
  @version 2.0
--%>
<%@ page session="false"
  import="net.sf.basedb.core.SessionControl"
  import="net.sf.basedb.core.DbControl"
  import="net.sf.basedb.core.Item"
  import="net.sf.basedb.core.ItemContext"
  import="net.sf.basedb.core.BasicItem"
  import="net.sf.basedb.core.Removable"
  import="net.sf.basedb.core.Permission"
  import="net.sf.basedb.core.Trashcan"
  import="net.sf.basedb.core.ItemInUseException"
  import="net.sf.basedb.core.PermissionDeniedException"
  import="net.sf.basedb.clients.web.Base"
  import="net.sf.basedb.clients.web.WebException"
  import="net.sf.basedb.util.Values"
  import="net.sf.basedb.clients.web.util.HTML"
  import="java.util.Enumeration"
  import="java.util.Set"
  import="java.util.HashSet"
  import="java.util.List"
  import="java.util.LinkedList"
  import="java.util.Iterator"
%>
<%@ taglib prefix="base" uri="/WEB-INF/base.tld" %>
<%!
  private static final ItemContext defaultContext = Base.createDefaultContext("", "type,name");
  private static final Item itemType = Item.SYSTEM;
  private static final String subContext = "trashcan";
%>
<%
final SessionControl sc = Base.getExistingSessionControl(pageContext, true);
final String ID = sc.getId();
final String cmd = request.getParameter("cmd");
final String root = request.getContextPath()+"/";

final String listPage = "list_trash.jsp?ID="+ID;
final String viewPage = "view_item.jsp?ID="+ID;

String forward = null;
String redirect = null;
String message = null;
DbControl dc = null;

try
{
  if (cmd == null || "List".equals(cmd))
  {
    // Display the list page without updatinging the current context
    Base.getAndSetCurrentContext(sc, itemType, subContext, null, defaultContext);
    redirect = listPage;
  }
  else if ("UpdateContext".equals(cmd))
  {
    // Display the list page after updating the current context from the request parameters
    Base.getAndSetCurrentContext(sc, itemType, subContext, pageContext, defaultContext);
    redirect = listPage;
  }
  else if ("LoadContext".equals(cmd))
  {
    // Display the list page after loading a saved context
    int contextId = Values.getInt(request.getParameter("context"));
    Base.loadContext(sc, contextId, defaultContext);
    redirect = listPage;
  }
  else if ("DeleteItemsPermanently".equals(cmd))
  {
    // Delete all selected items on the list page
    Enumeration<String> names = (Enumeration<String>)request.getParameterNames();
    List<Removable> items = new LinkedList<Removable>();
    dc = sc.newDbControl();
    while (names.hasMoreElements())
    {
      String name = names.nextElement();
      if (name.startsWith("item:"))
      {
        Item itemType = Item.valueOf(name.substring(5));
        Integer[] ids = Values.getInt(request.getParameterValues(name));
        for (int itemId : ids)
        {
          try
          {
            items.add((Removable)itemType.getById(dc, itemId));
          }
          catch (Throwable t)
          {}
        }
      }
    }
    dc.close();
    
    int numTotal = items.size();
    int numRemoved = Trashcan.delete(sc, items, false);

    if (numTotal != numRemoved)
    {
      message = (numRemoved == 0 ? "No" : "Only "+numRemoved+" of "+numTotal) + " items could be deleted, because you have no DELETE permission, or the item is used by other items";
    }
    redirect = listPage+(message != null ? "&popmessage="+HTML.urlEncode(message) : "");
  }
  else if ("DeleteItems".equals(cmd))
  {
    // Mark selected items as removed
    dc = sc.newDbControl();
    int numTotal = 0;
    int numDeleted = 0;

    Enumeration<String> names = (Enumeration<String>)request.getParameterNames();
    while (names.hasMoreElements())
    {
      String name = names.nextElement();
      if (name.startsWith("item:"))
      {
        Item itemType = Item.valueOf(name.substring(5));
        Integer[] ids = Values.getInt(request.getParameterValues(name));
        for (int itemId : ids)
        {
          numTotal++;
          try
          {
            BasicItem item = itemType.getById(dc, itemId);
            Removable r = (Removable)item;
            r.setRemoved(true);
            numDeleted++;
          }
          catch (PermissionDeniedException ex)
          {}
        }
      }
    }
    dc.commit();
    if (numTotal != numDeleted)
    {
      message = (numDeleted == 0 ? "No" : "Only "+numDeleted+" of "+numTotal) + " items could be deleted, because you have no DELETE permission";
    }
    Item itemType = Item.valueOf(request.getParameter("item_type"));
    int itemId = Values.getInt(request.getParameter("item_id"));
    
    redirect = viewPage+"&item_type=" + itemType.name() + "&item_id="+itemId
      +(message != null ? "&popmessage="+HTML.urlEncode(message) : "");
  }
  else if ("RestoreItems".equals(cmd))
  {
    // Restore all selected items on the list or view page 
    dc = sc.newDbControl();
    int numTotal = 0;
    int numRestored = 0;

    Enumeration<String> names = (Enumeration<String>)request.getParameterNames();
    while (names.hasMoreElements())
    {
      String name = names.nextElement();
      if (name.startsWith("item:"))
      {
        Item itemType = Item.valueOf(name.substring(5));
        Integer[] ids = Values.getInt(request.getParameterValues(name));
        for (int itemId : ids)
        {
          numTotal++;
          try
          {
            BasicItem item = itemType.getById(dc, itemId);
            Removable r = (Removable)item;
            r.setRemoved(false);
            numRestored++;
          }
          catch (PermissionDeniedException ex)
          {}
        }
      }
    }
    dc.commit();
    
    if (numTotal != numRestored)
    {
      message = (numRestored == 0 ? "No" : "Only "+numRestored+" of "+numTotal) + " items could be restored, because you have no WRITE permission";
    }

    if (request.getParameter("item_type") != null)
    {
      Item itemType = Item.valueOf(request.getParameter("item_type"));
      int itemId = Values.getInt(request.getParameter("item_id"));
      redirect = viewPage + "&item_type=" + itemType.name() + "&item_id="+itemId;
    }
    else
    {
      redirect = listPage;
    }
    redirect += (message != null ? "&popmessage="+HTML.urlEncode(message) : "");
  }
  else if ("RestoreItem".equals(cmd))
  {
    // Restore the currently viewed item
    dc = sc.newDbControl();
    Item itemType = Item.valueOf(request.getParameter("item_type"));
    int itemId = Values.getInt(request.getParameter("item_id"));
    String itemsIndexPage = request.getParameter("itemsIndexPage");
    BasicItem item = itemType.getById(dc, itemId);
    Removable r = (Removable)item;
    r.setRemoved(false);
    dc.commit();
    redirect = itemsIndexPage + "?ID=" + ID + "&cmd=ViewItem&item_id=" + itemId;
  }
  else if ("DeleteItem".equals(cmd))
  {
    // Delete the currently view item
    dc = sc.newDbControl();
    Item itemType = Item.valueOf(request.getParameter("item_type"));
    int itemId = Values.getInt(request.getParameter("item_id"));
    BasicItem item = itemType.getById(dc, itemId);
    dc.deleteItem(item);
    dc.commit();
    redirect = listPage;
  }
  else if ("DeleteAllPermanently".equals(cmd))
  {
    dc = sc.newDbControl();
    List<Removable> items = Trashcan.getItems(dc, null, 0, 0);
    dc.close();
    int numTotal = items.size();
    int numRemoved = Trashcan.delete(sc, items, false);
    
    if (numTotal != numRemoved)
    {
      message = (numRemoved == 0 ? "No" : "Only "+numRemoved+" of "+numTotal) + " items could be deleted, because you have no DELETE permission, or the item is used by other items";
    }
    redirect = listPage+(message != null ? "&popmessage="+HTML.urlEncode(message) : "");
  }
  else if ("ViewUsingItems".equals(cmd))
  {
    redirect = viewPage + "&item_type=" + request.getParameter("item_type") + "&item_id="+request.getParameter("item_id");
  }
  else
  {
    throw new WebException("popup", "Invalid command", "The command {1} is not recognised as a valid command.", cmd);
  }
}
finally
{
  if (dc != null) dc.close();
}

if (forward != null)
{
  pageContext.forward(forward);
}
else if (redirect != null)
{
  response.sendRedirect(redirect);
}
else if (message == null)
{
  response.sendRedirect(root + "common/close_popup.jsp?refresh_opener=1&wait=0");
}
else
{
  response.sendRedirect(root + "common/close_popup.jsp?refresh_opener=1&message="+HTML.urlEncode(message));
}
%>