alfresco-community-repo/source/java/org/alfresco/web/app/Application.java

/*
 * Copyright (C) 2005-2010 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */
package org.alfresco.web.app;

import java.io.IOException;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.ResourceBundle;

import javax.faces.context.FacesContext;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.alfresco.repo.SessionUser;
import org.alfresco.repo.content.MimetypeMap;
import org.alfresco.repo.importer.ImporterBootstrap;
import org.alfresco.service.cmr.repository.StoreRef;
import org.alfresco.service.cmr.security.AuthenticationService;
import org.alfresco.web.app.portlet.AlfrescoFacesPortlet;
import org.alfresco.web.app.servlet.AuthenticationHelper;
import org.alfresco.web.app.servlet.FacesHelper;
import org.alfresco.web.bean.ErrorBean;
import org.alfresco.web.bean.SidebarBean;
import org.alfresco.web.bean.dashboard.DashboardManager;
import org.alfresco.web.bean.dialog.DialogManager;
import org.alfresco.web.bean.repository.PreferencesService;
import org.alfresco.web.bean.repository.Repository;
import org.alfresco.web.bean.repository.User;
import org.alfresco.web.bean.users.UserPreferencesBean;
import org.alfresco.web.bean.wizard.WizardManager;
import org.alfresco.web.config.ClientConfigElement;
import org.alfresco.web.config.LanguagesConfigElement;
import org.apache.commons.logging.Log;
import org.springframework.context.ApplicationContext;
import org.springframework.extensions.config.Config;
import org.springframework.extensions.config.ConfigService;
import org.springframework.extensions.surf.util.I18NUtil;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.jsf.FacesContextUtils;

/**
 * Utilities class
 * 
 * @author gavinc
 */
public class Application
{
   private static final String LOCALE = "locale";
   
   public static final String BEAN_CONFIG_SERVICE = "webClientConfigService";
   public static final String BEAN_DATA_DICTIONARY = "dataDictionary";
   public static final String BEAN_IMPORTER_BOOTSTRAP = "spacesBootstrap";
   private static final String BEAN_UNPROTECTED_AUTH_SERVICE = "authenticationService";
   
   public static final String MESSAGE_BUNDLE = "alfresco.messages.webclient";
   
   private static ThreadLocal<Boolean> inPortalServer = new ThreadLocal<Boolean>();
   private static StoreRef repoStoreRef;
   private static String rootPath;
   private static String companyRootId;
   private static String glossaryFolderName;
   private static String spaceTemplatesFolderName;
   private static String contentTemplatesFolderName;
   private static String emailTemplatesFolderName;
   private static String inviteEmailTemplatesFolderName;
   private static String notifyEmailTemplatesFolderName;
   private static String rssTemplatesFolderName;
   private static String savedSearchesFolderName;
   private static String scriptsFolderName;
   private static String guestHomeFolderName;
   private static String websitesFolderName;
   private static String webContentFormsFolderName;
   private static String contentFormsFolderName;
   private static String projectsFolderName;
   
   private static Boolean isDynamicConfig = null;
   
   
   /**
    * Private constructor to prevent instantiation of this class 
    */
   private Application()
   {
   }
   
   /**
    * Sets whether this application is running inside a portal server
    * 
    * @param inPortal true to indicate the application is running as a portlet 
    */
   public static void setInPortalServer(boolean inPortal)
   {
      inPortalServer.set(inPortal ? Boolean.TRUE : null);
   }
   
   /**
    * Determines whether the server is running in a portal
    * 
    * @return true if we are running inside a portal server
    */
   public static boolean inPortalServer()
   {
      Boolean result = inPortalServer.get();
      return result == null ? false : result;
   }
   
   /**
    * Handles errors thrown from servlets
    * 
    * @param servletContext The servlet context
    * @param request The HTTP request
    * @param response The HTTP response
    * @param error The exception
    * @param logger The logger
    */
   public static void handleServletError(ServletContext servletContext, HttpServletRequest request,
         HttpServletResponse response, Throwable error, Log logger, String returnPage)
      throws IOException, ServletException
   {
      // get the error bean from the session and set the error that occurred.
      HttpSession session = request.getSession();
      ErrorBean errorBean = (ErrorBean)session.getAttribute(ErrorBean.ERROR_BEAN_NAME);
      if (errorBean == null)
      {
         errorBean = new ErrorBean();
         session.setAttribute(ErrorBean.ERROR_BEAN_NAME, errorBean);
      }
      errorBean.setLastError(error);
      errorBean.setReturnPage(returnPage);
      
      // try and find the configured error page
      boolean errorShown = false;
      String errorPage = getErrorPage(servletContext);
      
      if (errorPage != null)
      {
         if (logger.isDebugEnabled())
            logger.debug("An error has occurred, redirecting to error page: " + errorPage);
         
         if (response.isCommitted() == false)
         {
            errorShown = true;
            response.sendRedirect(request.getContextPath() + errorPage);
         }
         else
         {
            if (logger.isDebugEnabled())
               logger.debug("Response is already committed, re-throwing error");
         }
      }
      else
      {
         if (logger.isDebugEnabled())
            logger.debug("No error page defined, re-throwing error");
      }
      
      // if we could not show the error page for whatever reason, re-throw the error
      if (!errorShown)
      {
         if (error instanceof IOException)
         {
            throw (IOException)error;
         }
         else if (error instanceof ServletException)
         {
            throw (ServletException)error;
         }
         else
         {
            throw new ServletException(error);
         }
      }
   }
   
   /**
    * Handles error conditions detected by servlets.
    * 
    * @param servletContext
    *           The servlet context
    * @param request
    *           The HTTP request
    * @param response
    *           The HTTP response
    * @param messageKey
    *           the resource bundle key for the error mesage
    * @param statusCode
    *           the status code to set on the response
    * @param logger
    *           The logger
    * @throws IOException
    *            Signals that an I/O exception has occurred.
    * @throws ServletException
    *            the servlet exception
    */
   public static void handleSystemError(ServletContext servletContext, HttpServletRequest request,
         HttpServletResponse response, String messageKey, int statusCode, Log logger)
         throws IOException, ServletException
   {
      // get the error bean from the session and set the error that occurred.
      HttpSession session = request.getSession();
      ErrorBean errorBean = (ErrorBean)session.getAttribute(ErrorBean.ERROR_BEAN_NAME);
      if (errorBean == null)
      {
         errorBean = new ErrorBean();
         session.setAttribute(ErrorBean.ERROR_BEAN_NAME, errorBean);
      }
      errorBean.setErrorMessageKey(messageKey);
      errorBean.setReturnPage(null);
      
      // try and find the configured error page
      boolean errorShown = false;
      String errorPage = getErrorPage(servletContext);
      
      if (errorPage != null)
      {
         if (logger.isDebugEnabled())
            logger.debug("An error has occurred, forwarding to error page: " + errorPage);
         
         if (!response.isCommitted())
         {
            errorShown = true;
            response.reset();
            response.setStatus(statusCode);
            response.setContentType(MimetypeMap.MIMETYPE_HTML);
            response.setCharacterEncoding("utf-8");
            servletContext.getRequestDispatcher(errorPage).include(request, response);
         }
         else
         {
            if (logger.isDebugEnabled())
               logger.debug("Response is already committed, re-throwing error");
         }
      }
      else
      {
         if (logger.isDebugEnabled())
            logger.debug("No error page defined, re-throwing error");
      }
      
      // if we could not show the error page for whatever reason, re-throw the error
      if (!errorShown)
      {
         throw new ServletException(getMessage(session, messageKey));
      }
   }

   /**
    * Retrieves the DialogManager managed bean 
    * 
    * @return DialogManager bean
    */
   public static DialogManager getDialogManager()
   {
      return (DialogManager)FacesHelper.getManagedBean(FacesContext.getCurrentInstance(), DialogManager.BEAN_NAME);
   }
   
   /**
    * Retrieves the WizardManager managed bean 
    * 
    * @return WizardManager bean
    */
   public static WizardManager getWizardManager()
   {
      return (WizardManager)FacesHelper.getManagedBean(FacesContext.getCurrentInstance(), WizardManager.BEAN_NAME);
   }
   
   /**
    * Retrieves the DashboardManager managed bean
    * 
    * @return DashboardManager bean
    */
   public static DashboardManager getDashboardManager()
   {
      return (DashboardManager)FacesHelper.getManagedBean(FacesContext.getCurrentInstance(), DashboardManager.BEAN_NAME);
   }
   
   /**
    * Retrieves the SidebarBean 
    * 
    * @return SidebarBean bean
    */
   public static SidebarBean getSidebarBean()
   {
      return (SidebarBean)FacesHelper.getManagedBean(FacesContext.getCurrentInstance(), "SidebarBean");
   }
   
   /**
    * Retrieves the configured error page for the application
    * 
    * @param servletContext The servlet context
    * @return The configured error page or null if the configuration is missing
    */
   public static String getErrorPage(ServletContext servletContext)
   {
      return getErrorPage(WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext));
   }
      
   /**
    * Retrieves the configured login page for the application
    * 
    * @param servletContext The servlet context
    * @return The configured login page or null if the configuration is missing
    */
   public static String getLoginPage(ServletContext servletContext)
   {
      return getLoginPage(WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext));
   }
      
   /**
    * @return Returns the User object representing the currently logged in user
    */
   public static User getCurrentUser(HttpSession session)
   {
      return (User)session.getAttribute(AuthenticationHelper.AUTHENTICATION_USER);
   }
   
   /**
    * @return Returns the User object representing the currently logged in user
    */
   public static User getCurrentUser(FacesContext context)
   {
      if (inPortalServer())
      {
         User user = (User) AlfrescoFacesPortlet.getPortletSessionAttribute(context,
               AuthenticationHelper.AUTHENTICATION_USER, true);
         if (user != null)
         {
            return user;
         }
      }
      return (User) context.getExternalContext().getSessionMap().get(AuthenticationHelper.AUTHENTICATION_USER);
   }

   public static void setCurrentUser(FacesContext context, User user)
   {
      if (inPortalServer())
      {
         AlfrescoFacesPortlet.setPortletSessionAttribute(context, AuthenticationHelper.AUTHENTICATION_USER, user, true);
      }
      else
      {
         context.getExternalContext().getSessionMap().put(AuthenticationHelper.AUTHENTICATION_USER, user);
      }
   }
   
   /**
    * Invalidate Alfresco ticket and Web/Portlet session and clear the Security context for this thread.
    * @param context
    */
   public static void logOut(FacesContext context)
   {
      String ticket = null;
      if (Application.inPortalServer())
      {
         ticket = AlfrescoFacesPortlet.onLogOut(context.getExternalContext().getRequest());
      }
      else
      {
         SessionUser user = getCurrentUser(context);
         if (user != null)
         {
            ticket = user.getTicket();
         }
         HttpServletRequest request = (HttpServletRequest) context.getExternalContext().getRequest();
         HttpSession session = request.getSession(false);
         if (session != null)
         {
            session.invalidate();
         }

         // remove the username cookie value
         Cookie authCookie = AuthenticationHelper.getAuthCookie(request);
         if (authCookie != null)
         {
            HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
            if (response.isCommitted())
            {
               // It's too late to do it now, but we can ask the login page to do it
               request.getSession().setAttribute(AuthenticationHelper.SESSION_INVALIDATED, true);
            }
            else
            {
               authCookie.setMaxAge(0);
               response.addCookie(authCookie);
            }
         }
      }
      
      // Explicitly invalidate the Alfresco ticket. This no longer happens on session expiry to allow for ticket
      // 'sharing'
      WebApplicationContext wc = FacesContextUtils.getRequiredWebApplicationContext(context);
      AuthenticationService unprotAuthService = (AuthenticationService) wc.getBean(BEAN_UNPROTECTED_AUTH_SERVICE);
      if (ticket != null)
      {
         unprotAuthService.invalidateTicket(ticket);
      }
      unprotAuthService.clearCurrentSecurityContext();      
   }

   /**
    * @return Returns the repository store URL (retrieved from config service)
    */
   public static StoreRef getRepositoryStoreRef(ServletContext context)
   {
      return getRepositoryStoreRef(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the repository store URL (retrieved from config service)
    */
   public static StoreRef getRepositoryStoreRef(FacesContext context)
   {
      return getRepositoryStoreRef(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns id of the company root
    * 
    * @deprecated Replace with user-context-specific getCompanyRootId (e.g. could be tenant-specific)
    */
   public static String getCompanyRootId()
   {
      return companyRootId;
   }
   
   /**
    * Sets the company root id. This is setup by the ContextListener.
    * 
    * @param id The company root id
    * 
    * @deprecated Replace with user-context-specific getCompanyRootId (e.g. could be tenant-specific)
    */
   public static void setCompanyRootId(String id)
   {
      companyRootId = id;
   }
   
   /**
    * @return Returns id of the company root 
    */
   public static String getCompanyRootId(FacesContext context)
   {   
	   User user = Application.getCurrentUser(context);
	   if (user != null)
	   {
		   String userCompanyRootId = user.getCompanyRootId();
		   if (userCompanyRootId == null)
		   {
			   userCompanyRootId = Repository.getCompanyRoot(context).getId();
			   user.setCompanyRootId(userCompanyRootId);
		   }
		   
		   return userCompanyRootId;
	   }
	   else
	   {
		   return null;
	   }
   }
   
   /**
    * @return Returns the root path for the application
    */
   public static String getRootPath(ServletContext context)
   {
      return getRootPath(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the root path for the application
    */
   public static String getRootPath(FacesContext context)
   {
      return getRootPath(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the glossary folder name
    */
   public static String getGlossaryFolderName(ServletContext context)
   {
      return getGlossaryFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the glossary folder name
    */
   public static String getGlossaryFolderName(FacesContext context)
   {
      return getGlossaryFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the Space templates folder name
    */
   public static String getSpaceTemplatesFolderName(ServletContext context)
   {
      return getSpaceTemplatesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the Space templates folder name
    */
   public static String getSpaceTemplatesFolderName(FacesContext context)
   {
      return getSpaceTemplatesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the Content templates folder name
    */
   public static String getContentTemplatesFolderName(ServletContext context)
   {
      return getContentTemplatesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the Content templates folder name
    */
   public static String getContentTemplatesFolderName(FacesContext context)
   {
      return getContentTemplatesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
     * @return Returns the Invite Email Templates folder name
     */
    public static String getInviteEmailTemplatesFolderName(ServletContext context)
    {
        return getInviteEmailTemplatesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
    }

    /**
     * @return Returns the Invite Email Templates folder name
     */
    public static String getInviteEmailTemplatesFolderName(FacesContext context)
    {
        return getInviteEmailTemplatesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
    }

    /**
     * @return Returns the Notify Email Templates folder name
     */
    public static String getNotifyEmailTemplatesFolderName(ServletContext context)
    {
        return getNotifyEmailTemplatesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
    }

    /**
     * @return Returns the Notify Email Templates folder name
     */
    public static String getNotifyEmailTemplatesFolderName(FacesContext context)
    {
        return getNotifyEmailTemplatesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
    }

    /**
    * @return Returns the Email templates folder name
    */
   public static String getEmailTemplatesFolderName(ServletContext context)
   {
      return getEmailTemplatesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the Email templates folder name
    */
   public static String getEmailTemplatesFolderName(FacesContext context)
   {
      return getEmailTemplatesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the RSS templates folder name
    */
   public static String getRSSTemplatesFolderName(ServletContext context)
   {
      return getRSSTemplatesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Returns the RSS templates folder name
    */
   public static String getRSSTemplatesFolderName(FacesContext context)
   {
      return getRSSTemplatesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Return the Saved Searches folder name
    */
   public static String getSavedSearchesFolderName(ServletContext context)
   {
      return getSavedSearchesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Return the Saved Searches folder name
    */
   public static String getSavedSearchesFolderName(FacesContext context)
   {
      return getSavedSearchesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Return the JavaScript scripts folder name
    */
   public static String getScriptsFolderName(ServletContext context)
   {
      return getScriptsFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Return the JavaScript scripts folder name
    */
   public static String getScriptsFolderName(FacesContext context)
   {
      return getScriptsFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return Return the Guest Home folder name
    */
   public static String getGuestHomeFolderName(ServletContext context)
   {
      return getGuestHomeFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return  Return the Guest Home folder name
    */
   public static String getGuestHomeFolderName(FacesContext context)
   {
      return getGuestHomeFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the Websites folder name
    */
   public static String getWebsitesFolderName(ServletContext context)
   {
      return getWebsitesFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the Websites folder name
    */
   public static String getWebsitesFolderName(FacesContext context)
   {
      return getWebsitesFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the WCM Content Forms folder name
    */
   public static String getWebContentFormsFolderName(ServletContext context)
   {
      return getWebContentFormsFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the WCM Content Forms folder name
    */
   public static String getWebContentFormsFolderName(FacesContext context)
   {
      return getWebContentFormsFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the Content Forms folder name
    */
   public static String getContentFormsFolderName(ServletContext context)
   {
      return getContentFormsFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the Content Forms folder name
    */
   public static String getContentFormsFolderName(FacesContext context)
   {
      return getContentFormsFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
<<<<<<< .working
    * @return the Projects folder name
    */
   public static String getProjectsFolderName(ServletContext context)
   {
      return getProjectsFolderName(WebApplicationContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * @return the Projects folder name
    */
   public static String getProjectsFolderName(FacesContext context)
   {
      return getProjectsFolderName(FacesContextUtils.getRequiredWebApplicationContext(context));
   }
   
   /**
    * Set the language locale for the current user context
    * 
    * @param context        FacesContext for current user
    * @param code           The ISO locale code to set
    */
   @SuppressWarnings("unchecked")
   public static void setLanguage(FacesContext context, String code)
   {
      Locale locale = I18NUtil.parseLocale(code);
      
      // set locale for JSF framework usage
      context.getViewRoot().setLocale(locale);
      
      // set locale for our framework usage
      context.getExternalContext().getSessionMap().put(LOCALE, locale);
      
      // clear the current message bundle - so it's reloaded with new locale
      context.getExternalContext().getSessionMap().remove(MESSAGE_BUNDLE);
      
      // Set the current locale in the server thread
      I18NUtil.setLocale(locale);
   }
   
   /**
    * Set the language locale for the current user session.
    * 
    * @param session        HttpSession for current user
    * @param code           The ISO locale code to set
    */
   @Deprecated
   public static void setLanguage(HttpSession session, String code)
   {
      Locale locale = I18NUtil.parseLocale(code);
      
      session.setAttribute(LOCALE, locale);
      session.removeAttribute(MESSAGE_BUNDLE);
      
      // Set the current locale in the server thread
      I18NUtil.setLocale(locale);
   }
   
   /**
    * Return the language Locale for the current user context
    * 
    * @param context        FacesContext for the current user
    * 
    * @return Current language Locale set or the VM default if none set - never null
    */
   public static Locale getLanguage(FacesContext fc)
   {
      Locale locale = (Locale)fc.getExternalContext().getSessionMap().get(LOCALE);
      if (locale == null)
      {
         // first check saved user preferences
         String strLocale = null;
         if (getCurrentUser(fc) != null)
         {
            strLocale = (String)PreferencesService.getPreferences(fc).getValue(
                     UserPreferencesBean.PREF_INTERFACELANGUAGE);
            if (strLocale != null)
            {
               locale = I18NUtil.parseLocale(strLocale);
            }
            else
            {
               // failing that, use the server default locale
               locale = Locale.getDefault();
            }
         }
         else
         {
            // else get from web-client config - the first item in the configured list of languages
            Config config = Application.getConfigService(fc).getConfig("Languages");
            LanguagesConfigElement langConfig = (LanguagesConfigElement)config.getConfigElement(
                  LanguagesConfigElement.CONFIG_ELEMENT_ID);
            List<String> languages = langConfig.getLanguages();
            if (languages != null && languages.size() != 0)
            {
               locale = I18NUtil.parseLocale(languages.get(0));
            }
            else
            {
               // failing that, use the server default locale
               locale = Locale.getDefault();
            }
         }
         // save in user session
         fc.getExternalContext().getSessionMap().put(LOCALE, locale);
      }
      return locale;
   }
   
   /**
    * Return the language Locale for the current user Session.
    * 
    * @param session        HttpSession for the current user
    * 
    * @return Current language Locale set or the VM default if none set - never null
    */
   public static Locale getLanguage(HttpSession session)
   {
      Locale locale = (Locale)session.getAttribute(LOCALE);
      if (locale == null)
      {
         // first check saved user preferences
         String strLocale = null;
         if (getCurrentUser(session) != null)
         {
            strLocale = (String)PreferencesService.getPreferences(session).getValue(
                     UserPreferencesBean.PREF_INTERFACELANGUAGE);
            if (strLocale != null)
            {
               locale = I18NUtil.parseLocale(strLocale);
            }
            else
            {
               // failing that, use the server default locale
               locale = Locale.getDefault();
            }
         }
         else
         {
            // else get from web-client config - the first item in the configured list of languages
            locale = getLanguage(WebApplicationContextUtils.getRequiredWebApplicationContext(session.getServletContext()));
         }
         // save in user session
         session.setAttribute(LOCALE, locale);
      }
      return locale;
   }
   
   /**
    * Return the configured language Locale for the application context
    * 
    * @param ctx
    *           the application context
    * @return Current language Locale set or the VM default if none set - never null
    */
   public static Locale getLanguage(ApplicationContext ctx)
   {
      // get from web-client config - the first item in the configured list of languages
      Config config = ((ConfigService) ctx.getBean(Application.BEAN_CONFIG_SERVICE)).getConfig("Languages");
      LanguagesConfigElement langConfig = (LanguagesConfigElement) config
            .getConfigElement(LanguagesConfigElement.CONFIG_ELEMENT_ID);
      List<String> languages = langConfig.getLanguages();
      if (languages != null && languages.size() != 0)
      {
         return I18NUtil.parseLocale(languages.get(0));
      }
      else
      {
         // failing that, use the server default locale
         return Locale.getDefault();
      }
   }
   
   /**
    * Get the specified I18N message string from the default message bundle for this user
    * 
    * @param context        FacesContext
    * @param msg            Message ID
    * 
    * @return String from message bundle or $$msg$$ if not found
    */
   public static String getMessage(FacesContext context, String msg)
   {
      return getBundle(context).getString(msg);
   }
   
   /**
    * Get the specified I18N message string from the default message bundle for this user
    * 
    * @param session        HttpSession
    * @param msg            Message ID
    * 
    * @return String from message bundle or $$msg$$ if not found
    */
   public static String getMessage(HttpSession session, String msg)
   {
      return getBundle(session).getString(msg);
   }
   
   /**
    * Get the specified the default message bundle for this user
    * 
    * @param session        HttpSession
    * 
    * @return ResourceBundle for this user
    */
   public static ResourceBundle getBundle(HttpSession session)
   {
      ResourceBundle bundle = (ResourceBundle)session.getAttribute(MESSAGE_BUNDLE);
      if (bundle == null)
      {
         // get Locale from language selected by each user on login
         Locale locale = (Locale)session.getAttribute(LOCALE);
         if (locale == null)
         {
            locale = Locale.getDefault();
         }
         bundle = ResourceBundleWrapper.getResourceBundle(MESSAGE_BUNDLE, locale);
         
         session.setAttribute(MESSAGE_BUNDLE, bundle);
      }
      
      return bundle;
   }
   
   /**
    * Get the specified the default message bundle for this user
    * 
    * @param context        FacesContext
    * 
    * @return ResourceBundle for this user
    */
   @SuppressWarnings("unchecked")
   public static ResourceBundle getBundle(FacesContext context)
   {
      // get the resource bundle for the current locale
      // we store the bundle in the users session
      // this makes it easy to add a locale per user support later
      Map session = context.getExternalContext().getSessionMap();
      ResourceBundle bundle = (ResourceBundle)session.get(MESSAGE_BUNDLE);
      if (bundle == null)
      {
         // get Locale from language selected by each user on login
         Locale locale = (Locale)session.get(LOCALE);
         if (locale == null)
         {
            locale = Locale.getDefault();
         }
         bundle = ResourceBundleWrapper.getResourceBundle(MESSAGE_BUNDLE, locale);
         
         session.put(MESSAGE_BUNDLE, bundle);
      }
      
      return bundle;
   }
   
   /**
    * Helper to get the ConfigService instance
    * 
    * @param context        FacesContext
    * 
    * @return ConfigService
    */
   public static ConfigService getConfigService(FacesContext context)
   {
      return (ConfigService)FacesContextUtils.getRequiredWebApplicationContext(context).getBean(
            Application.BEAN_CONFIG_SERVICE);
   }
   
   /**
    * Helper to get the ConfigService instance
    * 
    * @param context        ServletContext
    * 
    * @return ConfigService
    */
   public static ConfigService getConfigService(ServletContext context)
   {
      return (ConfigService)WebApplicationContextUtils.getRequiredWebApplicationContext(context).getBean(
            Application.BEAN_CONFIG_SERVICE);
   }
   
   /**
    * Helper to get the client config element from the config service
    * 
    * @param context FacesContext
    * @return The ClientConfigElement
    */
   public static ClientConfigElement getClientConfig(FacesContext context)
   {
      return (ClientConfigElement)getConfigService(context).getGlobalConfig().
         getConfigElement(ClientConfigElement.CONFIG_ELEMENT_ID);
   }
   
   /**
    * Helper to get the client config element from the config service
    * 
    * @param context ServletContext
    * @return The ClientConfigElement
    */
   public static ClientConfigElement getClientConfig(ServletContext context)
   {
      return (ClientConfigElement)getConfigService(context).getGlobalConfig().
         getConfigElement(ClientConfigElement.CONFIG_ELEMENT_ID);
   }
   
   /**
    * Returns the repository store URL
    * 
    * @param context The spring context
    * @return The repository store URL to use
    */
   private static StoreRef getRepositoryStoreRef(WebApplicationContext context)
   {
      if (repoStoreRef == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         repoStoreRef = bootstrap.getStoreRef();
      }
      
      return repoStoreRef;
   }
   
   /**
    * Returns the root path for the application
    * 
    * @param context The spring context
    * @return The application root path
    */
   private static String getRootPath(WebApplicationContext context)
   {
      if (rootPath == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         rootPath = configuration.getProperty("spaces.company_home.childname");
      }
      
      return rootPath;
   }
   
   /**
    * Returns the glossary folder name
    * 
    * @param context The spring context
    * @return The glossary folder name
    */
   private static String getGlossaryFolderName(WebApplicationContext context)
   {
      if (glossaryFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         glossaryFolderName = configuration.getProperty("spaces.dictionary.childname");
      }
      
      return glossaryFolderName;
   }
   
   /**
    * Returns the Space Templates folder name
    * 
    * @param context The spring context
    * @return The templates folder name
    */
   private static String getSpaceTemplatesFolderName(WebApplicationContext context)
   {
      if (spaceTemplatesFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         spaceTemplatesFolderName = configuration.getProperty("spaces.templates.childname");
      }
      
      return spaceTemplatesFolderName;
   }
   
   /**
    * Returns the Content Templates folder name
    * 
    * @param context The spring context
    * @return The templates folder name
    */
   private static String getContentTemplatesFolderName(WebApplicationContext context)
   {
      if (contentTemplatesFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         contentTemplatesFolderName = configuration.getProperty("spaces.templates.content.childname");
      }
      
      return contentTemplatesFolderName;
   }
   
   /**
    * Returns the Email Templates folder name
    * 
    * @param context The spring context
    * @return The email folder name
    */
   private static String getEmailTemplatesFolderName(WebApplicationContext context)
   {
      if (emailTemplatesFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         emailTemplatesFolderName = configuration.getProperty("spaces.templates.email.childname");
      }
      
      return emailTemplatesFolderName;
   }
   
   /**
     * Returns the Invite Email Templates folder name
     * 
     * @param context The spring context
     * @return The invite email folder name
     */
    private static String getInviteEmailTemplatesFolderName(WebApplicationContext context)
    {
        if (inviteEmailTemplatesFolderName == null)
        {
            ImporterBootstrap bootstrap = (ImporterBootstrap) context.getBean(BEAN_IMPORTER_BOOTSTRAP);
            Properties configuration = bootstrap.getConfiguration();
            inviteEmailTemplatesFolderName = configuration.getProperty("spaces.templates.email.invite1.childname");
        }

        return inviteEmailTemplatesFolderName;
    }

    /**
     * Returns the Notify Email Templates folder name
     * 
     * @param context The spring context
     * @return The notify email folder name
     */
    private static String getNotifyEmailTemplatesFolderName(WebApplicationContext context)
    {
        if (notifyEmailTemplatesFolderName == null)
        {
            ImporterBootstrap bootstrap = (ImporterBootstrap) context.getBean(BEAN_IMPORTER_BOOTSTRAP);
            Properties configuration = bootstrap.getConfiguration();
            notifyEmailTemplatesFolderName = configuration.getProperty("spaces.templates.email.notify.childname");
        }

        return notifyEmailTemplatesFolderName;
    }

    /**
    * Returns the RSS Templates folder name
    * 
    * @param context The spring context
    * @return The RSS folder name
    */
   private static String getRSSTemplatesFolderName(WebApplicationContext context)
   {
      if (rssTemplatesFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         rssTemplatesFolderName = configuration.getProperty("spaces.templates.rss.childname");
      }
      
      return rssTemplatesFolderName;
   }
   
   /**
    * Returns the Saved Searches folder name
    * 
    * @param context The spring context
    * @return The saved searches folder name
    */
   private static String getSavedSearchesFolderName(WebApplicationContext context)
   {
      /*
       * This lookup is duplicated in a patch.  If this logic changes, investigate the changes
       * required for the patch(es).
       */
       
      if (savedSearchesFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         savedSearchesFolderName = configuration.getProperty("spaces.savedsearches.childname");
      }
      
      return savedSearchesFolderName;
   }
   
   /**
    * Returns the JavaScript scripts folder name
    * 
    * @param context The spring context
    * @return The scripts folder name
    */
   private static String getScriptsFolderName(WebApplicationContext context)
   {
      if (scriptsFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         scriptsFolderName = configuration.getProperty("spaces.scripts.childname");
      }
      
      return scriptsFolderName;
   }
   
   /**
    * Returns the Guest Home folder name name
    * 
    * @param context The spring context
    * @return The Guest Home folder name
    */
   private static String getGuestHomeFolderName(WebApplicationContext context)
   {
      if (guestHomeFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         guestHomeFolderName = configuration.getProperty("spaces.guest_home.childname");
      }
      
      return guestHomeFolderName;
   }
   
   /**
    * Returns the Websites folder name
    * 
    * @param context The Spring context
    * @return The Websites folder name
    */
   private static String getWebsitesFolderName(WebApplicationContext context)
   {
      if (websitesFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         websitesFolderName = configuration.getProperty("spaces.wcm.childname");
      }
      
      return websitesFolderName;
   }
   
   /**
    * Returns the Projects folder name
    * 
    * @param context The Spring context
    * @return The Projects folder name
    */
   private static String getProjectsFolderName(WebApplicationContext context)
   {
      if (projectsFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         projectsFolderName = configuration.getProperty("spaces.projects.childname");
      }
      
      return projectsFolderName;
   }
   
   /**
    * Returns the WCM Content Forms folder name
    * 
    * @param context The Spring context
    * @return The WCM Content Forms folder name
    */
   private static String getWebContentFormsFolderName(WebApplicationContext context)
   {
      if (webContentFormsFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         webContentFormsFolderName = configuration.getProperty("spaces.wcm_content_forms.childname");
      }
      
      return webContentFormsFolderName;
   }
   
   /**
    * Returns the Content Forms folder name
    * 
    * @param context The Spring context
    * @return The WCM Content Forms folder name
    */
   private static String getContentFormsFolderName(WebApplicationContext context)
   {
      if (contentFormsFolderName == null)
      {
         ImporterBootstrap bootstrap = (ImporterBootstrap)context.getBean(BEAN_IMPORTER_BOOTSTRAP);
         Properties configuration = bootstrap.getConfiguration();
         contentFormsFolderName = configuration.getProperty("spaces.content_forms.childname");
      }
      
      return contentFormsFolderName;
   }
   
   /**
    * Retrieves the configured error page for the application
    * 
    * @param context The Spring context
    * @return The configured error page or null if the configuration is missing
    */
   public static String getErrorPage(ApplicationContext context)
   {
      String errorPage = null;
      
      ConfigService svc = (ConfigService)context.getBean(BEAN_CONFIG_SERVICE);
      ClientConfigElement clientConfig = (ClientConfigElement)svc.getGlobalConfig().
            getConfigElement(ClientConfigElement.CONFIG_ELEMENT_ID);
      
      if (clientConfig != null)
      {
         errorPage = clientConfig.getErrorPage();
      }
      
      return errorPage;
   }
   
   /**
    * Retrieves the configured login page for the application
    * 
    * @param context The Spring contexr
    * @return The configured login page or null if the configuration is missing
    */
   public static String getLoginPage(ApplicationContext context)
   {
      String loginPage = null;
      
      ConfigService svc = (ConfigService)context.getBean(BEAN_CONFIG_SERVICE);
      ClientConfigElement clientConfig = (ClientConfigElement)svc.getGlobalConfig().
            getConfigElement(ClientConfigElement.CONFIG_ELEMENT_ID);
      
      if (clientConfig != null)
      {
         loginPage = clientConfig.getLoginPage();
      }
      
      return loginPage;
   }
   
   public static boolean isDynamicConfig(FacesContext context)
   {
       if (isDynamicConfig == null)
       {
          String dynamicConfigParam = FacesContextUtils.getRequiredWebApplicationContext(context).getServletContext().getInitParameter("org.alfresco.webclient.dynamicConfig");
          isDynamicConfig = new Boolean(((dynamicConfigParam == null) || (new Boolean(dynamicConfigParam).booleanValue() == true)));
       }
       
       return isDynamicConfig.booleanValue();
   }
}