Pithos_GSS » GSS

/*

 * 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.MultipleGetCommand;

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

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;

/**

 * @author kman

 */

public class FolderSubtree extends Subtree {

        /**

         * A constant that denotes the completion of an IncrementalCommand.

         */

        public static final boolean DONE = false;

        private DnDTreeItem rootItem;

        public FolderSubtree(PopupTree aTree, final Images _images) {

                super(aTree, _images);

                aTree.clear();

                DeferredCommand.addCommand(new IncrementalCommand() {

                        @Override

                        public boolean execute() {

                                return fetchRootFolder();

                        }

                });

        }

        public boolean fetchRootFolder() {

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

                if (userResource == null)

                        return !DONE;

                final String path = userResource.getFilesPath();

                GetCommand<FolderResource> gf = new GetCommand<FolderResource>(FolderResource.class, path, null) {

                        @Override

                        public void onComplete() {

                                FolderResource rootResource = getResult();

                                rootItem = new DnDTreeItem(imageItemHTML(images.home(), rootResource.getName()), false,tree,true);

                                rootItem.setUserObject(rootResource);

                                tree.clear();

                                tree.addItem(rootItem);

                                rootItem.doDroppable();

                                GSS.get().getFolders().select(rootItem);

                                updateSubFoldersLazily(rootItem, rootResource.getFolders(), images.folderYellow(), images.sharedFolder());

                                rootItem.setState(true);

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("Error fetching root folder", t);

                                GSS.get().displayError("Unable to fetch root folder");

                                if(rootItem != null){

                                        rootItem = new DnDTreeItem(imageItemHTML(images.home(), "ERROR"), false,tree);

                                        tree.clear();

                                        tree.addItem(rootItem);

                                }

                        }

                };

                DeferredCommand.addCommand(gf);

                return DONE;

        }

        public void updateSubfolders(final DnDTreeItem folderItem) {

                if (folderItem.getFolderResource() == null) {

                        GWT.log("folder resource is null", null);

                        return;

                }

                updateNodes(folderItem);

        }

        private void updateNodes(final DnDTreeItem folderItem) {

                String parentName = "";

                if (folderItem.getParentItem() != null)

                        parentName = ((DnDTreeItem) folderItem.getParentItem()).getFolderResource().getName() + "->";

                parentName = parentName + folderItem.getFolderResource().getName();

                MultipleGetCommand<FolderResource> gf = new MultipleGetCommand<FolderResource>(FolderResource.class,

                                        folderItem.getFolderResource().getSubfolderPaths().toArray(new String[] {}), folderItem.getFolderResource().getCache()) {

                        @Override

                        public void onComplete() {

                                List<FolderResource> res = getResult();

                                folderItem.getFolderResource().setFolders(res);

                                updateSubFoldersLazily(folderItem, res, images.folderYellow(), images.sharedFolder());

                                for (int i = 0; i < folderItem.getChildCount(); i++) {

                                        DnDTreeItem anItem = (DnDTreeItem) folderItem.getChild(i);

                                        updateSubFoldersLazily(anItem, anItem.getFolderResource().getFolders(), images.folderYellow(), images.sharedFolder());

                                        anItem.setState(false);

                                }

                        }

                        @Override

                        public void onError(Throwable t) {

                                GSS.get().displayError("Unable to fetch subfolders");

                                GWT.log("Unable to fetch subfolders", t);

                        }

                        @Override

                        public void onError(String p, Throwable throwable) {

                                GWT.log("Path:"+p, throwable);

                        }

                };

                DeferredCommand.addCommand(gf);

        }

        public void updateFolderAndSubfolders(final DnDTreeItem folderItem) {

                final String path = folderItem.getFolderResource().getUri();

                GetCommand<FolderResource> gf = new GetCommand<FolderResource>(FolderResource.class, path, folderItem.getFolderResource()) {

                        @Override

                        public void onComplete() {

                                FolderResource rootResource = getResult();

                                if (!folderItem.equals(rootItem)) {

                                        folderItem.undoDraggable();

                                        if(rootResource.isShared())

                                                folderItem.updateWidget(imageItemHTML(images.sharedFolder(), rootResource.getName()));

                                        else

                                                folderItem.updateWidget(imageItemHTML(images.folderYellow(), rootResource.getName()));

                                        folderItem.setUserObject(rootResource);

                                        folderItem.doDraggable();

                                } else{

                                        folderItem.undoDroppable();

                                        folderItem.setUserObject(rootResource);

                                        folderItem.updateWidget(imageItemHTML(images.home(), rootResource.getName()));

                                        folderItem.doDroppable();

                                }

                                updateSubfolders(folderItem);

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("Error fetching folder", t);

                                GSS.get().displayError("Unable to fetch folder:" + folderItem.getFolderResource().getName());

                        }

                };

                DeferredCommand.addCommand(gf);

        }

        /**

         * Retrieve the rootItem.

         *

         * @return the rootItem

         */

        public TreeItem getRootItem() {

                return rootItem;

        }

}