Synnefo » Pithos Web Client

/*

 * Copyright 2011 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 */

package gr.grnet.pithos.web.client.commands;

import gr.grnet.pithos.web.client.FileUploadDialog;

import gr.grnet.pithos.web.client.GSS;

import gr.grnet.pithos.web.client.rest.GetCommand;

import gr.grnet.pithos.web.client.rest.resource.FileResource;

import gr.grnet.pithos.web.client.rest.resource.FolderResource;

import gr.grnet.pithos.web.client.rest.resource.RestResource;

import gr.grnet.pithos.web.client.rest.resource.RestResourceWrapper;

import java.util.ArrayList;

import java.util.List;

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

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

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

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

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

/**

 * Upload a file command

 *

 */

public class UploadFileCommand implements Command {

        private PopupPanel containerPanel;

        private List<FileResource> files;

        public UploadFileCommand(PopupPanel _containerPanel) {

                containerPanel = _containerPanel;

        }

        @Override

        public void execute() {

                if(containerPanel!=null)

                        containerPanel.hide();

                displayNewFile();

        }

        /**

         * Display the 'new file' dialog for uploading a new file to the system.

         */

        private void displayNewFile() {

                RestResource currentFolder = GSS.get().getTreeView().getSelection();

                if (currentFolder == null) {

                        GSS.get().displayError("You have to select the parent folder first");

                        return;

                }

                getFileList();

                DeferredCommand.addCommand(new IncrementalCommand() {

                        @Override

                        public boolean execute() {

                                boolean res = canContinue();

                                if (res) {

                                        FileUploadDialog dlg = GWT.create(FileUploadDialog.class);

                                        dlg.setFiles(files);

                                        dlg.center();

                                        return false;

                                }

                                return true;

                        }

                });

        }

        private boolean canContinue() {

                if (files != null )

                        return true;

                return false;

        }

        private void getFileList() {

                GetCommand<FolderResource> eg = new GetCommand<FolderResource>(FolderResource.class,((RestResourceWrapper)GSS.get().getTreeView().getSelection()).getUri(), null){

                        @Override

                        public void onComplete() {

                                files = getResult().getFiles();

                        }

                        @Override

                        public void onError(Throwable t) {

                                files = new ArrayList<FileResource>();

                        }

                };

                DeferredCommand.addCommand(eg);

        }

}