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/*

 * 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.commands;

import gr.ebs.gss.client.FileUploadDialog;

import gr.ebs.gss.client.GSS;

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

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

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

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;

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

/**

 * Upload a file command

 *

 * @author kman

 */

public class UploadFileCommand implements Command {

        private PopupPanel containerPanel;

        private List<FileResource> files;

        public UploadFileCommand(PopupPanel _containerPanel) {

                containerPanel = _containerPanel;

        }

        public void execute() {

                containerPanel.hide();

                displayNewFile();

        }

        /**

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

         */

        private void displayNewFile() {

                TreeItem currentFolder = GSS.get().getFolders().getCurrent();

                if (currentFolder == null) {

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

                        return;

                }

                getFileList();

                DeferredCommand.addCommand(new IncrementalCommand() {

                        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,((FolderResource)GSS.get().getFolders().getCurrent().getUserObject()).getUri(), null){

                        @Override

                        public void onComplete() {

                                files = getResult().getFiles();

                        }

                        @Override

                        public void onError(Throwable t) {

                                files = new ArrayList<FileResource>();

                        }

                };

                DeferredCommand.addCommand(eg);

        }

}