Synnefo » Pithos

/*

 * Copyright 2008, 2009 Electronic Business Systems Ltd.

 *

 * This file is part of GSS.

 *

 * GSS 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 3 of the License, or

 * (at your option) any later version.

 *

 * GSS 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 GSS.  If not, see <http://www.gnu.org/licenses/>.

 */

package gr.ebs.gss.client.tree;

import gr.ebs.gss.client.Folders.Images;

import gr.ebs.gss.client.GSS;

import gr.ebs.gss.client.PopupTree;

import gr.ebs.gss.client.dnd.DnDTreeItem;

import gr.ebs.gss.client.rest.GetCommand;

import gr.ebs.gss.client.rest.RestException;

import gr.ebs.gss.client.rest.resource.FolderResource;

import gr.ebs.gss.client.rest.resource.TrashResource;

import gr.ebs.gss.client.rest.resource.UserResource;

import java.util.List;

import com.google.gwt.core.client.GWT;

import com.google.gwt.user.client.DeferredCommand;

import com.google.gwt.user.client.IncrementalCommand;

import com.google.gwt.user.client.ui.TreeItem;

import com.google.gwt.user.client.ui.Widget;

/**

 * @author kman

 */

public class TrashSubtree extends Subtree {

        /**

         * A constant that denotes the completion of an IncrementalCommand.

         */

        public static final boolean DONE = false;

        private DnDTreeItem rootItem;

        public TrashSubtree(PopupTree aTree, final Images _images) {

                super(aTree, _images);

                DeferredCommand.addCommand(new IncrementalCommand() {

                        @Override

                        public boolean execute() {

                                return updateInit();

                        }

                });

        }

        public boolean updateInit() {

                UserResource userResource = GSS.get().getCurrentUserResource();

                if ( userResource == null || GSS.get().getFolders().getRootItem() == null)

                        return !DONE;

                update();

                return DONE;

        }

        public void update() {

                DeferredCommand.addCommand(new GetCommand<TrashResource>(TrashResource.class, GSS.get().getCurrentUserResource().getTrashPath(), null) {

                        @Override

                        public void onComplete() {

                                if(rootItem == null){

                                        Widget rootItemWidget = imageItemHTML(images.trash(), "Trash");

                                        rootItemWidget.getElement().setId("tree.trash");

                                        rootItem = new DnDTreeItem(rootItemWidget, false,tree);

                                        tree.addItem(rootItem);

                                        rootItem.doDroppable();

                                }

                                rootItem.setUserObject(getResult());

                                rootItem.removeItems();

                                List<FolderResource> res = rootItem.getTrashResource().getTrashedFolders();

                                for (FolderResource r : res) {

                                        DnDTreeItem child = (DnDTreeItem) addImageItem(rootItem, r.getName(), images.folderYellow(), true);

                                        child.setUserObject(r);

                                        child.setState(false);

                                }

                        }

                        @Override

                        public void onError(Throwable t) {

                                if(t instanceof RestException){

                                        int statusCode = ((RestException)t).getHttpStatusCode();

                                        // On IE status code 1223 may be returned instead of 204.

                                        if(statusCode == 204 || statusCode == 1223){

                                                GWT.log("Trash is empty", null);

                                                if(rootItem == null){

                                                        rootItem = new DnDTreeItem(imageItemHTML(images.trash(), "Trash"), false,tree);

                                                        tree.addItem(rootItem);

                                                        rootItem.doDroppable();

                                                }

                                                rootItem.setUserObject(new TrashResource(GSS.get().getCurrentUserResource().getTrashPath()));

                                                rootItem.removeItems();

                                        } else{

                                                if(rootItem == null){

                                                        rootItem = new DnDTreeItem(imageItemHTML(images.trash(), "Trash"), false,tree);

                                                        tree.addItem(rootItem);

                                                }

                                                rootItem.setUserObject(new TrashResource(GSS.get().getCurrentUserResource().getTrashPath()));

                                                GSS.get().displayError("Unable to fetch trash folder:"+((RestException)t).getHttpStatusText());

                                        }

                                }

                                else{

                                        GWT.log("", t);

                                        GSS.get().displayError("Unable to fetch trash folder:"+t.getMessage());

                                        if(rootItem == null){

                                                rootItem = new DnDTreeItem(imageItemHTML(images.trash(), "Trash"), false,tree);

                                                tree.addItem(rootItem);

                                                rootItem.doDroppable();

                                        }

                                        rootItem.setUserObject(new TrashResource(GSS.get().getCurrentUserResource().getTrashPath()));

                                }

                        }

                });

        }

        /**

         * Retrieve the rootItem.

         *

         * @return the rootItem

         */

        public TreeItem getRootItem() {

                return rootItem;

        }

}