/*
* Navigation.java
*
* Version: $Revision: 1.8 $
*
* Date: $Date: 2006/06/02 21:37:46 $
*
* Copyright (c) 2002, 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.xmlui.aspect.eperson;
import java.io.IOException;
import java.io.Serializable;
import java.sql.SQLException;
import java.util.Enumeration;
import java.util.Locale;
import org.apache.cocoon.caching.CacheableProcessingComponent;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.util.HashUtil;
import org.apache.excalibur.source.SourceValidity;
import org.apache.excalibur.source.impl.validity.NOPValidity;
import org.dspace.app.xmlui.cocoon.AbstractDSpaceTransformer;
import org.dspace.app.xmlui.utils.DSpaceValidity;
import org.dspace.app.xmlui.utils.UIException;
import org.dspace.app.xmlui.wing.Message;
import org.dspace.app.xmlui.wing.WingException;
import org.dspace.app.xmlui.wing.element.List;
import org.dspace.app.xmlui.wing.element.Options;
import org.dspace.app.xmlui.wing.element.UserMeta;
import org.dspace.authorize.AuthorizeException;
import org.dspace.eperson.EPerson;
import org.dspace.eperson.Group;
import org.xml.sax.SAXException;
/**
* Add the eperson navigation items to the document. This includes:
*
* 1) Login and Logout links
*
* 2) Navigational links to register or edit their profile based
* upon wheather the user is authenticatied or not.
*
* 3) User metadata
*
* 4) The user's language prefrences (wheather someone is logged
* in or not)
*
* @author Scott Phillips
*/
public class Navigation extends AbstractDSpaceTransformer implements CacheableProcessingComponent
{
/** Language Strings */
private static final Message T_my_account =
message("xmlui.EPerson.Navigation.my_account");
private static final Message T_profile =
message("xmlui.EPerson.Navigation.profile");
private static final Message T_logout =
message("xmlui.EPerson.Navigation.logout");
private static final Message T_login =
message("xmlui.EPerson.Navigation.login");
private static final Message T_register =
message("xmlui.EPerson.Navigation.register");
/** Cached validity object */
private SourceValidity validity;
/**
* Generate the unique key.
* This key must be unique inside the space of this component.
*
* @return The generated key hashes the src
*/
public Serializable getKey()
{
Request request = ObjectModelHelper.getRequest(objectModel);
// Special case, don't cache anything if the user is logging
// in. The problem occures because of timming, this cache key
// is generated before we know whether the operation has
// succeded or failed. So we don't know whether to cache this
// under the user's specific cache or under the anonymous user.
if (request.getParameter("login_email") != null ||
request.getParameter("login_password") != null ||
request.getParameter("login_realm") != null )
{
return null;
}
// FIXME:
// Do not cache the home page. There is a bug that is causing the
// homepage to be cached with user's data after a logout. This
// polutes the cache. As a work-around this problem we just won't
// cache this page.
if (request.getSitemapURI().length() == 0)
{
return null;
}
String key;
if (context.getCurrentUser() != null)
key = context.getCurrentUser().getEmail();
else
key = "anonymous";
// Add the user's language
Enumeration locales = request.getLocales();
while (locales.hasMoreElements())
{
Locale locale = (Locale) locales.nextElement();
key += "-" + locale.toString();
}
return HashUtil.hash(key);
}
/**
* Generate the validity object.
*
* @return The generated validity object or <code>null</code> if the
* component is currently not cacheable.
*/
public SourceValidity getValidity()
{
if (this.validity == null)
{
// Only use the DSpaceValidity object is someone is logged in.
if (context.getCurrentUser() != null)
{
try {
DSpaceValidity validity = new DSpaceValidity();
validity.add(eperson);
Group[] groups = Group.allMemberGroups(context, eperson);
for (Group group : groups)
{
validity.add(group);
}
this.validity = validity.complete();
}
catch (SQLException sqle)
{
// Just ignore it and return invalid.
}
}
else
{
this.validity = NOPValidity.SHARED_INSTANCE;
}
}
return this.validity;
}
/**
* Add the eperson aspect navigational options.
*/
public void addOptions(Options options) throws SAXException, WingException,
UIException, SQLException, IOException, AuthorizeException
{
/* Create skeleton menu structure to ensure consistent order between aspects,
* even if they are never used
*/
options.addList("browse");
List account = options.addList("account");
options.addList("context");
options.addList("administrative");
account.setHead(T_my_account);
EPerson eperson = this.context.getCurrentUser();
if (eperson != null)
{
String fullName = eperson.getFullName();
account.addItemXref(contextPath+"/logout",T_logout);
account.addItemXref(contextPath+"/profile",T_profile.parameterize(fullName));
}
else
{
account.addItemXref(contextPath+"/login",T_login);
account.addItemXref(contextPath+"/register",T_register);
}
}
/**
* Add the user metadata
*/
public void addUserMeta(UserMeta userMeta) throws SAXException,
WingException, UIException, SQLException, IOException,
AuthorizeException
{
EPerson eperson = context.getCurrentUser();
if (eperson != null)
{
userMeta.setAuthenticated(true);
userMeta.addMetadata("identifier").addContent(eperson.getID());
userMeta.addMetadata("identifier","email").addContent(eperson.getEmail());
userMeta.addMetadata("identifier","firstName").addContent(eperson.getFirstName());
userMeta.addMetadata("identifier","lastName").addContent(eperson.getLastName());
userMeta.addMetadata("identifier","logoutURL").addContent(contextPath+"/logout");
userMeta.addMetadata("identifier","url").addContent(contextPath+"/profile");
}
else
{
userMeta.setAuthenticated(false);
}
// Allways have a login URL.
userMeta.addMetadata("identifier","loginURL").addContent(contextPath+"/login");
// Allways add language information
Request request = ObjectModelHelper.getRequest(objectModel);
Enumeration locales = request.getLocales();
while (locales.hasMoreElements())
{
Locale locale = (Locale) locales.nextElement();
userMeta.addMetadata("language","RFC3066").addContent(locale.toString());
}
}
/**
* recycle
*/
public void recycle()
{
this.validity = null;
super.recycle();
}
}
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