package org.apache.struts.example.tiles.portal;
import org.apache.struts.action.Action;
import org.apache.struts.tiles.*;
import org.apache.struts.tiles.actions.TilesAction;
import org.apache.struts.tiles.beans.MenuItem;
import java.io.IOException;
import java.util.List;
import java.util.Iterator;
import java.util.ArrayList;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.util.MessageResources;
import org.apache.struts.util.RequestUtils;
/**
* Tiles controller as Struts Action.
* This controller take a list of lists of MenuItems, and arrange them
* to be shown by appropriate jsp view.
* Create and set following attribute in Tile context :
* <ul>
* <li>names : list of names to display</li>
* <li>returnedValues : list of corresponding key, or values to return</li>
* <li>selecteds : list of boolean indicating whether or not a name is selected</li>
* </ul>
* Tiles input attributes :
* <ul>
* <li>title : menu title</li>
* <li>items : Menu entries used as default when user settings is created</li>
* <li>defaultChoice : Menus or menu entries porposed as choice to user</li>
* <li>storeUnderName : Store user settings under provided name in session context [optional]</li>
* <li></li>
* </ul>
* Tiles output attributes :
* <ul>
* <li>choiceItems : List of menu items proposed as a choice</li>
* <li>userItems : List of user actual menu items</li>
* </ul>
*
*/
public class UserMenuSettingsAction extends TilesAction
{
/** debug flag */
public static boolean debug = false;
/**
* Process the specified HTTP request, and create the corresponding HTTP
* response (or forward to another web component that will create it).
* Return an <code>ActionForward</code> instance describing where and how
* control should be forwarded, or <code>null</code> if the response has
* already been completed.
*
* @param servlet The ActionServlet making this request
* @param mapping The ActionMapping used to select this instance
* @param actionForm The optional ActionForm bean for this request (if any)
* @param request The HTTP request we are processing
* @param response The HTTP response we are creating
*
* @exception IOException if an input/output error occurs
* @exception ServletException if a servlet exception occurs
*/
public ActionForward perform( ComponentContext context,
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
if(debug)
System.out.println("Enter action UserMenuSettingsAction");
MenuSettingsForm actionForm = (MenuSettingsForm)form;
// Load user menu settings and available list of choices
MenuSettings settings = UserMenuAction.getUserSettings( request, context );
List catalog = UserMenuAction.getCatalog( context, request, getServlet().getServletContext() );
// Check if form is submitted
// If true, read, check and store new values submitted by user.
if( actionForm.isSubmitted() )
{ // read arrays
if(debug)
System.out.println("form submitted");
settings.reset();
settings.addItems( getItems(actionForm.getSelected(), catalog) );
if(debug)
System.out.println( "settings : " +settings.toString() );
actionForm.reset();
//return null; // (mapping.findForward("viewPortal"));
} // end if
// Prepare data for view tile
context.putAttribute( "userItems", settings.getItems() );
context.putAttribute( "catalog", catalog );
if(debug)
System.out.println("Exit action UserMenuSettingsAction");
return null;
}
/**
* Check selected items, and return apppropriate list of items.
* For each item in selected list, check if it exist in catalog.
* Also check for double.
* @param selectedKey Key of selected items (generally, link url)
* @param catalog List of avalaible items to compare against.
*/
static protected List getItems( String[] selectedKey, List catalog )
{
List selectedList = java.util.Arrays.asList( selectedKey );
List result = new ArrayList(selectedList.size());
////////////////
Iterator iter = selectedList.iterator();
while( iter.hasNext() )
{
MenuItem item = getItem( iter.next(), catalog);
if( item != null )
result.add(item );
} // end loop
return result;
}
/**
* Get item by its key in list of choices
* @param key Key of selected items (generally, link url)
* @param catalog List of avalaible items to compare against.
* @return corresponding item or null if not found.
*/
static protected MenuItem getItem( Object key, List catalog )
{
Iterator iter = catalog.iterator();
while( iter.hasNext() )
{
MenuItem item = (MenuItem)iter.next();
if( item.getLink().equals( key) )
return item;
} // end loop
return null;
}
}