*  See license distributed with this file and

*  available online at http://www.uportal.org/license.html

*/

* This is a general UserPreference component. A structure/theme

* stylesheet is expected to replace this component with its own

* class to make layout/stylesheet preference management more

* intuitive.

* @author Ken Weiner, kweiner@interactivebusiness.com

* @author Peter Kharchenko, peterk@interactivebusiness.com

* @version $Revision: 1.5 $

*/

    private static final Log log = LogFactory.getLog(GPreferencesState.class);

    private UserProfile profile;

    protected ChannelRuntimeData runtimeData;

    private UserPreferences up = null;

    private IUserLayoutManager ulm=null;

    ThemeStylesheetDescription tsd = null;

    StructureStylesheetDescription ssd = null;

    protected IUserLayoutStore ulsdb = UserLayoutStoreFactory.getUserLayoutStoreImpl();

    // these state variables are kept for the use by the internalStates

    // just a way to refer to the layout element since it doesn't have an ID attribute

    private static final String layoutID = IUserLayout.ROOT_NODE_NAME;               

    private String folderID = layoutID;

    private boolean modified = false;             // becomes true after user makes changes to layout

    private static final String bundleLocation =

          "/org/jasig/portal/channels/GPreferencesState/GPreferencesState";

    /**

     * Check if the user layout or preferences have been modified.

     *

     * @return a <code>boolean</code> value

     */

    protected boolean isModified() {

        return  modified;

    }

    /**

     * Set modification state

     *

     * @param mod a <code>boolean</code> value

     */

    protected void setModified(boolean mod) {

        this.modified = mod;

    }

    /**

     * Set current folderId.

     *

     * @param id a <code>String</code> value

     */

    protected void setFolderID(String id) {

        this.folderID = id;

        if (folderID == null)

            folderID = layoutID;

    }

    /**

     * Obtain current folderId

     *

     * @return a <code>String</code> value

     */

    protected String getFolderID() {

        if (folderID == null)

            folderID = layoutID;

        return  this.folderID;

    }

   

    protected String getLayoutRootID() {

        return  layoutID;

    }

  public GPreferencesState() {

    super();

    this.internalState = new GBrowseState(this);

    ulsdb = UserLayoutStoreFactory.getUserLayoutStoreImpl();

  }

    /**

     * Creates a new <code>GPreferencesState</code> for a given context.

     *

     * @param context a <code>CUserPreferences</code> value

     */

    public GPreferencesState(CUserPreferences context) {

    super(context);

    this.internalState = new GBrowseState(this);

  }

  public GPreferencesState(CUserPreferences context, UserProfile p) {

    this.profile = p;

    // initialize in a browse state

    this.internalState = new GBrowseState(this);

  }

  protected IUserLayoutManager getUserLayoutManager() throws PortalException {

      if(this.ulm==null) {

          IUserPreferencesManager upm = context.getUserPreferencesManager();

          // If the we are editing the current user layout, get a copy of the current user layout,

          // otherwise get it from the database or other persistant storage

          if (modifyingCurrentUserLayout()) {

              // get it from the preferences manager

              this.ulm=upm.getUserLayoutManager();

          }  else {

              // construct a new one

              this.ulm=UserLayoutManagerFactory.getUserLayoutManager(upm.getPerson(),context.getCurrentUserPreferences().getProfile());

      }

    }

      return this.ulm;

  }

  private boolean modifyingCurrentUserLayout () throws PortalException {

      // check if we're editing the same layout (note: this relies on the layout Ids to be meaningful, which

      // is not entirely true with the current "template user layout" feature. Hopefully this will go away soon.

      //      return (context.getUserPreferencesManager().getCurrentProfile().getProfileId()==context.getEditedUserProfile().getProfileId() && context.getUserPreferencesManager().getCurrentProfile().isSystemProfile()==context.getEditedUserProfile().isSystemProfile());

      return (context.getUserPreferencesManager().getCurrentProfile().getLayoutId()==context.getEditedUserProfile().getLayoutId());

  }

   

  protected IUserPreferencesManager getUserPreferencesManager() {

    return  context.getUserPreferencesManager();

  }

  protected UserPreferences getUserPreferences() throws ResourceMissingException, PortalException {

    if (up == null) {

      // load UserPreferences from the DB

      try {

        up = ulsdb.getUserPreferences(context.getUserPreferencesManager().getPerson(), this.getProfile());

        up.synchronizeWithUserLayoutXML(this.getUserLayoutManager().getUserLayoutDOM());

      } catch (Exception e) {

        throw new PortalException(e);

      }

    }

    return  up;

  }

  protected ThemeStylesheetDescription getThemeStylesheetDescription() throws PortalException{

    if (tsd == null) {

      ThemeStylesheetUserPreferences ssup = up.getThemeStylesheetUserPreferences();

      try {

        tsd = ulsdb.getThemeStylesheetDescription(ssup.getStylesheetId());

      } catch (Exception e) {

        throw new PortalException(e);

      }

    }

    return  tsd;

  }

  protected StructureStylesheetDescription getStructureStylesheetDescription() throws ResourceMissingException, PortalException {

    if (ssd == null) {

      StructureStylesheetUserPreferences fsup = this.getUserPreferences().getStructureStylesheetUserPreferences();

      try {

        ssd = ulsdb.getStructureStylesheetDescription(fsup.getStylesheetId());

      } catch (Exception e) {

        throw new PortalException(e);

      }

    }

    return  ssd;

  }

  public void setPortalControlStructures(PortalControlStructures pcs) throws PortalException {

    if (this.internalState != null) {

      this.internalState.setPortalControlStructures(pcs);

    }

  }

  protected StylesheetSet getStylesheetSet() {

    return  context.getStylesheetSet();

  }

 

  protected UserProfile getProfile() {

    if (profile == null)

      profile = context.getUserPreferencesManager().getCurrentProfile();

    return  profile;

  }

  public void setRuntimeData(ChannelRuntimeData rd) throws PortalException {

    this.runtimeData = rd;

    String action = runtimeData.getParameter("action");

    if (action != null) {

      if (action.equals("submitEditChoice")) {

        String manageTarget = runtimeData.getParameter("userPreferencesAction");

        if (manageTarget.equals("layout")) {

          this.folderID = this.getLayoutRootID();

          // browse mode

          GBrowseState bstate = new GBrowseState(this);

          bstate.setRuntimeData(rd);

          this.internalState = bstate;

        } else if (manageTarget.equals("gpref")) {

          // invoke gpref mode

          GGlobalPrefsState pstate = new GGlobalPrefsState(this);

          pstate.setRuntimeData(rd);

          this.internalState = pstate;

        }

      }

    }

    if (this.internalState != null) {

        this.internalState.setRuntimeData(rd);

    }

  }

  public void renderXML(ContentHandler out) throws PortalException {

      if (this.internalState != null) {

          this.internalState.renderXML(out);

      }

      else {

          log.error( "CUserPreferences.GPreferencesState::renderXML() : no internal state !");

      }

  }

  protected class GEditLayoutItemState extends BaseState {

    protected GPreferencesState context;

    private String editElementID;

    public GEditLayoutItemState(GPreferencesState context) {

      this.context = context;

    }

    public void setRuntimeData(ChannelRuntimeData rd) throws PortalException {

      String action = runtimeData.getParameter("action");

      if (action != null) {

        if (action.equals("editElement")) {

          editElementID = runtimeData.getParameter("folderID");

        }

        else if (action.equals("submitEditValues")) {

          String submit = runtimeData.getParameter("submit");

          if (submit.equals("Cancel")) {

            // return to the browse state

            IPrivilegedChannel bstate = new GBrowseState(context);

            bstate.setRuntimeData(rd);

            context.setState(bstate);

          }

          else if (submit.equals("Save")) {

            prepareSaveEditedItem();

          }

        }

      }

    }

    private void prepareSaveEditedItem() throws PortalException {

      // update node name

      IUserLayoutNodeDescription node=getUserLayoutManager().getNode(editElementID);

      node.setName(runtimeData.getParameter("name"));

      getUserLayoutManager().updateNode(node);

     

      // reset the name

      if (node instanceof IUserLayoutChannelDescription) {

        // target is a channel

        StructureStylesheetUserPreferences ssup = context.getUserPreferences().getStructureStylesheetUserPreferences();

        for (Enumeration ce = ssup.getChannelAttributeNames(); ce.hasMoreElements();) {

          String atName = (String)ce.nextElement();

          String atValue = runtimeData.getParameter(atName);

          if (atValue.equals(context.getStructureStylesheetDescription().getChannelAttributeDefaultValue(atName))) {

              atValue = null;

          }

          ssup.setChannelAttributeValue(editElementID, atName, atValue);

        }

        ThemeStylesheetUserPreferences tsup = context.getUserPreferences().getThemeStylesheetUserPreferences();

        for (Enumeration ca = tsup.getChannelAttributeNames(); ca.hasMoreElements();) {

          String atName = (String)ca.nextElement();

          String atValue = runtimeData.getParameter(atName);

          if (atValue.equals(context.getThemeStylesheetDescription().getChannelAttributeDefaultValue(atName))) {

            atValue = null;

          }

          tsup.setChannelAttributeValue(editElementID, atName, atValue);

        }

      } else {

        // target is a folder

        StructureStylesheetUserPreferences ssup = context.getUserPreferences().getStructureStylesheetUserPreferences();

        for (Enumeration fe = ssup.getFolderAttributeNames(); fe.hasMoreElements();) {

          String atName = (String)fe.nextElement();

          String atValue = runtimeData.getParameter(atName);

          if (atValue.equals(context.getStructureStylesheetDescription().getFolderAttributeDefaultValue(atName))) {

            atValue = null;

          }

          ssup.setFolderAttributeValue(editElementID, atName, atValue);

        }

      }

      context.setModified(true);

      // get back to browse mode

      IPrivilegedChannel bstate = new GBrowseState(context);

      bstate.setRuntimeData(runtimeData);

      context.setState(bstate);

    }

    public void renderXML(ContentHandler out) throws PortalException {

        IUserLayoutNodeDescription node=getUserLayoutManager().getNode(editElementID);

        String elType="folder";

        if(node instanceof IUserLayoutChannelDescription) {

            elType="channel";

        }

      // construct the descriptive XML

      Document doc = DocumentFactory.getNewDocument();

      Element edEl = doc.createElement("editelement");

      Element typeEl = doc.createElement("type");

      if (elType.equals("folder")) {

        typeEl.appendChild(doc.createTextNode("folder"));

      } else {

        typeEl.appendChild(doc.createTextNode("channel"));

      }

      edEl.appendChild(typeEl);

      Element nameEl = doc.createElement("name");

      nameEl.appendChild(doc.createTextNode(node.getName()));

      edEl.appendChild(nameEl);

      // determine element type

      if (elType.equals("folder")) {

        // target is a folder

        StructureStylesheetUserPreferences ssup = context.getUserPreferences().getStructureStylesheetUserPreferences();

        Element saEl = doc.createElement("structureattributes");

        for (Enumeration fe = ssup.getFolderAttributeNames(); fe.hasMoreElements();) {

          Element atEl = doc.createElement("attribute");

          Element atNameEl = doc.createElement("name");

          String atName = (String)fe.nextElement();

          atNameEl.appendChild(doc.createTextNode(atName));

          atEl.appendChild(atNameEl);

          Element valueEl = doc.createElement("value");

          String value = ssup.getFolderAttributeValue(editElementID, atName);

          if (value == null) {

            // set the default value

            value = context.getStructureStylesheetDescription().getFolderAttributeDefaultValue(atName);

          }

          valueEl.appendChild(doc.createTextNode(value));

          atEl.appendChild(valueEl);

          Element descrEl = doc.createElement("description");

          descrEl.appendChild(doc.createTextNode(context.getStructureStylesheetDescription().getFolderAttributeWordDescription(atName)));

          atEl.appendChild(descrEl);

          saEl.appendChild(atEl);

        }

        edEl.appendChild(saEl);

      } else if (elType.equals("channel")) {

        // target is a channel

        StructureStylesheetUserPreferences ssup = context.getUserPreferences().getStructureStylesheetUserPreferences();

        Element saEl = doc.createElement("structureattributes");

        for (Enumeration ce = ssup.getChannelAttributeNames(); ce.hasMoreElements();) {

          Element atEl = doc.createElement("attribute");

          Element atNameEl = doc.createElement("name");

          String atName = (String)ce.nextElement();

          atNameEl.appendChild(doc.createTextNode(atName));

          atEl.appendChild(atNameEl);

          Element valueEl = doc.createElement("value");

          String value = ssup.getChannelAttributeValue(editElementID, atName);

          if (value == null) {

            value = context.getStructureStylesheetDescription().getChannelAttributeDefaultValue(atName);

          }

          valueEl.appendChild(doc.createTextNode(value));

          atEl.appendChild(valueEl);

          Element descrEl = doc.createElement("description");

          descrEl.appendChild(doc.createTextNode(context.getStructureStylesheetDescription().getChannelAttributeWordDescription(atName)));

          atEl.appendChild(descrEl);

          saEl.appendChild(atEl);

        }

        edEl.appendChild(saEl);

        ThemeStylesheetUserPreferences tsup = context.getUserPreferences().getThemeStylesheetUserPreferences();

        Element taEl = doc.createElement("themeattributes");

        for (Enumeration ce = tsup.getChannelAttributeNames(); ce.hasMoreElements();) {

          Element atEl = doc.createElement("attribute");

          Element atNameEl = doc.createElement("name");

          String atName = (String)ce.nextElement();

          atNameEl.appendChild(doc.createTextNode(atName));

          atEl.appendChild(atNameEl);

          Element valueEl = doc.createElement("value");

          String value = tsup.getChannelAttributeValue(editElementID, atName);

          if (value == null) {

            value = context.getThemeStylesheetDescription().getChannelAttributeDefaultValue(atName);

          }

          valueEl.appendChild(doc.createTextNode(value));

          atEl.appendChild(valueEl);

          Element descrEl = doc.createElement("description");

          descrEl.appendChild(doc.createTextNode(context.getThemeStylesheetDescription().getChannelAttributeWordDescription(atName)));

          atEl.appendChild(descrEl);

          taEl.appendChild(atEl);

        }

        edEl.appendChild(taEl);

      }

      doc.appendChild(edEl);

      // debug printout of the prepared xml

      try {

          StringWriter outString = new StringWriter();

        /* TODO: This should be reviewed at some point to see if we can use the

           * DOM3 LS capability and hence a standard way of doing this rather

         * than using an internal implementation class.

           */

          OutputFormat format = new OutputFormat();

          format.setOmitXMLDeclaration(true);

          format.setIndenting(true);

          XMLSerializer xsl = new XMLSerializer(outString, format);

          xsl.serialize(doc);

        log.debug(outString.toString());

      } catch (Exception e) {

        log.debug(e, e);

      }

      StylesheetSet set = context.getStylesheetSet();

      if (set == null) {

          throw  new GeneralRenderingException("Unable to determine the stylesheet list");

      }

      String xslURI = set.getStylesheetURI("editItem", runtimeData.getBrowserInfo());

      if (xslURI != null) {

        ResourceBundle l18n = ResourceBundle.getBundle(bundleLocation,runtimeData.getLocales()[0]);

        XSLT xslt = XSLT.getTransformer(this);

        xslt.setResourceBundle(l18n);

       

        xslt.setXML(doc);

        xslt.setXSL(this.getClass().getResource(xslURI).toString());

        xslt.setTarget(out);

        xslt.setStylesheetParameter("baseActionURL", runtimeData.getBaseActionURL());

        xslt.transform();

      } else {

          throw  new ResourceMissingException("", "stylesheet", "Unable to find stylesheet to display content for this media");

      }

    }

  }

  protected class GGlobalPrefsState extends BaseState {

    ChannelRuntimeData runtimeData;

    protected GPreferencesState context;

    public GGlobalPrefsState(GPreferencesState context) {

      this.context = context;

    }

    public void setRuntimeData(ChannelRuntimeData rd) throws PortalException {

      this.runtimeData = rd;

      // internal state handling

      String action = runtimeData.getParameter("action");

      if (action != null) {

        if (action.equals("submitEditValues")) {

          String submit = runtimeData.getParameter("submit");

          if (submit == null || submit.equals("Save")) {

            prepareSaveEditGPrefs();

          }

          else if (submit.equals("Cancel")) {

            IPrivilegedChannel bstate = new GBrowseState(context);

            bstate.setRuntimeData(runtimeData);

            context.setState(bstate);

          }

        }

      }

    }

    public void renderXML(ContentHandler out) throws PortalException {

      // construct gpref XML

      Document doc = DocumentFactory.getNewDocument();

      Element edEl = doc.createElement("gpref");

      StructureStylesheetUserPreferences ssup = context.getUserPreferences().getStructureStylesheetUserPreferences();

      Element spEl = doc.createElement("structureparameters");

      for (Enumeration e = context.getStructureStylesheetDescription().getStylesheetParameterNames(); e.hasMoreElements();) {

        Element atEl = doc.createElement("parameter");

        Element atNameEl = doc.createElement("name");

        String atName = (String)e.nextElement();

        atNameEl.appendChild(doc.createTextNode(atName));

        atEl.appendChild(atNameEl);

        Element valueEl = doc.createElement("value");

        String value = ssup.getParameterValue(atName);

        if (value == null) {

          // set the default value

          value = context.getStructureStylesheetDescription().getStylesheetParameterDefaultValue(atName);

        }

        valueEl.appendChild(doc.createTextNode(value));

        atEl.appendChild(valueEl);

        Element descrEl = doc.createElement("description");

        descrEl.appendChild(doc.createTextNode(context.getStructureStylesheetDescription().getStylesheetParameterWordDescription(atName)));

        atEl.appendChild(descrEl);

        spEl.appendChild(atEl);

      }

      edEl.appendChild(spEl);

      ThemeStylesheetUserPreferences tsup = context.getUserPreferences().getThemeStylesheetUserPreferences();

      Element tpEl = doc.createElement("themeparameters");

      for (Enumeration e = context.getThemeStylesheetDescription().getStylesheetParameterNames(); e.hasMoreElements();) {

        Element atEl = doc.createElement("parameter");

        Element atNameEl = doc.createElement("name");

        String atName = (String)e.nextElement();

        atNameEl.appendChild(doc.createTextNode(atName));

        atEl.appendChild(atNameEl);

        Element valueEl = doc.createElement("value");

        String value = tsup.getParameterValue(atName);

        if (value == null) {

          // set the default value

          value = context.getThemeStylesheetDescription().getStylesheetParameterDefaultValue(atName);

        }

        valueEl.appendChild(doc.createTextNode(value));

        atEl.appendChild(valueEl);

        Element descrEl = doc.createElement("description");

        descrEl.appendChild(doc.createTextNode(context.getThemeStylesheetDescription().getStylesheetParameterWordDescription(atName)));

        atEl.appendChild(descrEl);

        tpEl.appendChild(atEl);

      }

      edEl.appendChild(tpEl);

      doc.appendChild(edEl);

      // debug printout of the prepared xml

      try {

          StringWriter outString = new StringWriter();

        /* TODO: This should be reviewed at some point to see if we can use the

           * DOM3 LS capability and hence a standard way of doing this rather

         * than using an internal implementation class.

           */

          OutputFormat format = new OutputFormat();

          format.setOmitXMLDeclaration(true);

          format.setIndenting(true);

        XMLSerializer serializer = new XMLSerializer(outString, format);       

        serializer.serialize(doc);

        if (log.isDebugEnabled())

          log.debug(outString.toString());

      } catch (Exception e) {

        log.debug(e, e);

      }

      StylesheetSet set = context.getStylesheetSet();

      if (set == null) {

          throw  new GeneralRenderingException("Unable to determine the stylesheet list");

      }

      String xslURI = set.getStylesheetURI("editGPrefs", runtimeData.getBrowserInfo());

      if (xslURI != null) {

        ResourceBundle l18n = ResourceBundle.getBundle(bundleLocation,runtimeData.getLocales()[0]);

        XSLT xslt = XSLT.getTransformer(this);

        xslt.setResourceBundle(l18n);

       

        xslt.setXML(doc);

        xslt.setXSL(this.getClass().getResource(xslURI).toString());

        xslt.setTarget(out);

        xslt.setStylesheetParameter("baseActionURL", runtimeData.getBaseActionURL());

        xslt.transform();

      } else {

          throw  new ResourceMissingException("", "stylesheet", "Unable to find stylesheet to display content for this media");

      }

    }

     

    private void prepareSaveEditGPrefs() throws PortalException {

      StructureStylesheetUserPreferences ssup = context.getUserPreferences().getStructureStylesheetUserPreferences();

      for (Enumeration e = context.getStructureStylesheetDescription().getStylesheetParameterNames(); e.hasMoreElements();) {

        String parName = (String)e.nextElement();

        String value = runtimeData.getParameter(parName);

        if (value == null) {

          ssup.putParameterValue(parName, context.getStructureStylesheetDescription().getStylesheetParameterDefaultValue(parName));

        } else {

          ssup.putParameterValue(parName, value);

          //        log.debug("CUserPreferences.GGlobalPrefsState::prepareSaveEditGPrefs() : setting sparameter "+parName+"=\""+value+"\".");

        }

      }

      ThemeStylesheetUserPreferences tsup = context.getUserPreferences().getThemeStylesheetUserPreferences();

      for (Enumeration e = context.getThemeStylesheetDescription().getStylesheetParameterNames(); e.hasMoreElements();) {

        String parName = (String)e.nextElement();

        String value = runtimeData.getParameter(parName);

        if (value == null) {

          tsup.putParameterValue(parName, context.getThemeStylesheetDescription().getStylesheetParameterDefaultValue(parName));

        } else {

          tsup.putParameterValue(parName, value);

          //        log.debug("CUserPreferences.GGlobalPrefsState::prepareSaveEditGPrefs() : setting tparameter "+parName+"=\""+value+"\".");

        }

      }

      context.setModified(true);

      IPrivilegedChannel bstate = new GBrowseState(context);

      bstate.setRuntimeData(runtimeData);

      context.setState(bstate);

    }

  }

    ChannelRuntimeData runtimeData;

    protected GPreferencesState context;

    public GBrowseState (GPreferencesState context) {

      this.context = context;

    }

 

    public void setRuntimeData(ChannelRuntimeData rd) throws PortalException {

      this.runtimeData = rd;

      // internal state handling

      String action = runtimeData.getParameter("action");

      if (action != null) {

        if (action.equals("browse")) {

          String runtimeFolderID = runtimeData.getParameter("folderID");

          if (runtimeFolderID != null) {

            context.setFolderID(runtimeFolderID);

          }

        } else if (action.equals("move")) {

          IPrivilegedChannel mts = new GMoveToState(context);

          mts.setRuntimeData(rd);

          context.setState(mts);

        } else if (action.equals("reorder"))

          prepareReorder();

        else if (action.equals("saveChanges")) {

          prepareSaveChanges();

        } else if (action.equals("editElement")) {

          IPrivilegedChannel eli = new GEditLayoutItemState(context);

          eli.setRuntimeData(rd);

          context.setState(eli);

        }

      }

    }

    public void renderXML(ContentHandler out) throws PortalException {

      StylesheetSet set = context.getStylesheetSet();

      if (set == null) {

          throw  new GeneralRenderingException("Unable to determine the stylesheet list");

      }

      String xslURI = null;

      xslURI = set.getStylesheetURI("browse", runtimeData.getBrowserInfo());

      Hashtable params = new Hashtable();

      params.put("folderID", context.getFolderID());

      params.put("modified", new Boolean(context.isModified()));

      params.put("baseActionURL", runtimeData.getBaseActionURL());

      params.put("profileName", context.getProfile().getProfileName());

      if (context.getProfile().isSystemProfile()) {

        params.put("profileType", "system");

      } else {

        params.put("profileType", "user");

      }

      if (xslURI != null) {

        XSLT xslt = XSLT.getTransformer(this, runtimeData.getLocales());

        xslt.setXML(context.getUserLayoutManager().getUserLayoutDOM());

        xslt.setXSL(this.getClass().getResource(xslURI).toString());

        xslt.setTarget(out);

        xslt.setStylesheetParameters(params);

        xslt.transform();

      }

      else {

          throw  new ResourceMissingException("", "stylesheet", "Unable to find stylesheet to display content for this media");

      }

    }

    private void prepareSaveChanges() throws PortalException {

      context.setFolderID(context.getLayoutRootID());

      context.setModified(false);

      // relate changes back to the UserPreferencesManager if the profile that's being

      // edited is the current profile.

      // changes in userLayoutXML are always related back to the UserPreferencesManager.

      // (unless profile-specific layouts will be introduced)

      if (context.getUserPreferencesManager().getCurrentProfile() == context.getProfile()) {

          context.getUserPreferencesManager().setNewUserLayoutAndUserPreferences(context.getUserLayoutManager(), context.getUserPreferences());

      } else {

        // do a database save on the preferences

        try {

            // persist layout

            context.getUserLayoutManager().saveUserLayout();

            ulsdb.putUserPreferences(context.getUserPreferencesManager().getPerson(), context.getUserPreferences());

        } catch (Exception e) {

            throw new PortalException(e);

        }

      }

    }

    private void prepareReorder() throws PortalException {

      String folderID = runtimeData.getParameter("elementID");                  // the folder or channel ID

      String direction = runtimeData.getParameter("dir");       // "up" or "down"

      IUserLayoutManager lm=context.getUserLayoutManager();

      if (direction.equals("up")) {

          String prevSiblingId=lm.getPreviousSiblingId(folderID);

          if(prevSiblingId!=null) {

              lm.moveNode(folderID,lm.getParentId(folderID),prevSiblingId);

      }

          //        for (prev = element.getPreviousSibling(); prev != null && prev.getNodeType() != Node.ELEMENT_NODE && (!prev.getNodeName().equals("channel")  || !prev.getNodeName().equals("folder")); prev = prev.getPreviousSibling());

      } else if (direction.equals("down")) {

          String nextSiblingId=lm.getNextSiblingId(folderID);

          if(nextSiblingId!=null) {

              lm.moveNode(folderID,lm.getParentId(folderID),nextSiblingId);

      }

          //        for(next = element.getNextSibling(); next != null && next.getNodeType() != Node.ELEMENT_NODE && (!next.getNodeName().equals("channel") || !next.getNodeName().equals("folder")); next = next.getNextSibling());

      }

      context.setModified(true);

    }

  }

  protected class GMoveToState extends BaseState {

    private String[] moveIDs = null;            // contains the IDs of channels/folders to be moved

    protected ChannelRuntimeData runtimeData;

    protected GPreferencesState context;

  

    public GMoveToState(GPreferencesState context) {

      this.context = context;

    }

    public void setRuntimeData(ChannelRuntimeData rd) throws PortalException {

      this.runtimeData = rd;

      String action = runtimeData.getParameter("action");

      if (action != null) {

        if (action.equals("cancel")) {

        // prepareCancel ();

        } else if (action.equals("move"))

          prepareMove();

        else if (action.equals("moveTo"))

          prepareMoveTo();

      }

    }

    public void renderXML (ContentHandler out) throws PortalException {

      StylesheetSet set = context.getStylesheetSet();

      if (set == null)

        throw  new GeneralRenderingException("Unable to determine the stylesheet list");

      String xslURI = set.getStylesheetURI("moveTo", runtimeData.getBrowserInfo());

      if (xslURI != null) {

        XSLT xslt = XSLT.getTransformer(this, runtimeData.getLocales());

        xslt.setXML(context.getUserLayoutManager().getUserLayoutDOM());

        xslt.setXSL(this.getClass().getResource(xslURI).toString());

        xslt.setTarget(out);

        xslt.setStylesheetParameter("baseActionURL", runtimeData.getBaseActionURL());

        xslt.transform();

      }

      else

        throw  new ResourceMissingException("", "stylesheet", "Unable to find stylesheet to display content for this media");

    }

    private void prepareMove () {

      // getParameterValues() should be a method in ChannelRuntimeData.

      // For now, I'll use the request object -- ask Peter about this!

      moveIDs = runtimeData.getParameterValues("move");

    }

    private void prepareMoveTo () throws PortalException {

      String destinationID = runtimeData.getParameter("destination");

              for (int i = 0; i < moveIDs.length; i++) {

          getUserLayoutManager().moveNode(moveIDs[i],destinationID,null);

              }

              context.setModified(true);

              IPrivilegedChannel bstate = new GBrowseState(context);

              bstate.setRuntimeData(runtimeData);

              context.setState(bstate);

          }

      }

    }