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;

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

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

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

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

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

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

import java.util.Collections;

import java.util.Comparator;

import java.util.Date;

import java.util.List;

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

import com.google.gwt.http.client.URL;

import com.google.gwt.i18n.client.DateTimeFormat;

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

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

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

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

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

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

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

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

/**

 * @author kman

 */

public class VersionsList extends Composite {

        int selectedRow = -1;

        int permissionCount = -1;

        List<FileResource> versions = null;

        final Images images;

        final VerticalPanel permPanel = new VerticalPanel();

        final FlexTable permTable = new FlexTable();

        FileResource toRemove = null;

        FilePropertiesDialog container;

        public VersionsList(FilePropertiesDialog aContainer, final Images theImages, List<FileResource> theVersions) {

                images = theImages;

                container = aContainer;

                versions = theVersions;

                Collections.sort(theVersions, new Comparator<FileResource>(){

                        public int compare(FileResource o1, FileResource o2) {

                                return o1.getVersion().compareTo(o2.getVersion());

                        }

                });

                permTable.setText(0, 0, "Version");

                permTable.setText(0, 1, "Created");

                permTable.setText(0, 2, "Modified");

                permTable.setText(0, 3, "Size");

                permTable.setText(0, 4, "");

                permTable.setText(0, 5, "");

                permTable.getFlexCellFormatter().setStyleName(0, 0, "props-toplabels");

                permTable.getFlexCellFormatter().setStyleName(0, 1, "props-toplabels");

                permTable.getFlexCellFormatter().setStyleName(0, 2, "props-toplabels");

                permTable.getFlexCellFormatter().setStyleName(0, 3, "props-toplabels");

                permTable.getFlexCellFormatter().setColSpan(0, 1, 2);

                permTable.getFlexCellFormatter().setHorizontalAlignment(0, 0, HasHorizontalAlignment.ALIGN_CENTER);

                permTable.getFlexCellFormatter().setHorizontalAlignment(0, 1, HasHorizontalAlignment.ALIGN_CENTER);

                permTable.getFlexCellFormatter().setHorizontalAlignment(0, 2, HasHorizontalAlignment.ALIGN_CENTER);

                permTable.getFlexCellFormatter().setHorizontalAlignment(0, 3, HasHorizontalAlignment.ALIGN_CENTER);

                permPanel.add(permTable);

                permPanel.addStyleName("gwt-TabPanelBottom");

                permTable.addStyleName("gss-permList");

                initWidget(permPanel);

                updateTable();

        }

        public void updateTable() {

                int i = 1;

                if (toRemove != null) {

                        versions.remove(toRemove);

                        toRemove = null;

                }

                for (final FileResource dto : versions) {

                        HTML restoreVersion = new HTML("<a href='#' class='hidden-link info'>"+images.restore().getHTML()+"<span>Restore this Version</span></a>");

                        restoreVersion.addClickListener( new ClickListener() {

                                public void onClick(Widget sender) {

                                        restoreVersion(dto);

                                }

                        });

                        permTable.setHTML(i, 0, "<span>" + dto.getVersion() + "</span>");

                        permTable.setHTML(i, 1, "<span>" + formatDate(dto.getCreationDate()) + "</span>");

                        permTable.setHTML(i, 2, "<span>" + formatDate(dto.getModificationDate()) + "</span>");

                        permTable.setHTML(i, 3, "<span>" + dto.getFileSizeAsString() + "</span>");

                        String[] link = {"", ""};

                        createDownloadLink(link, dto);

                        HTML downloadHtml = new HTML(link[0]+images.download().getHTML()+"<span>View This Version</span>"+link[1]);

                        permTable.setWidget(i, 4, downloadHtml);

                        permTable.setWidget(i, 5, restoreVersion);

                        permTable.getFlexCellFormatter().setStyleName(i, 0, "props-labels");

                        permTable.getFlexCellFormatter().setHorizontalAlignment(i, 0, HasHorizontalAlignment.ALIGN_CENTER);

                        permTable.getFlexCellFormatter().setHorizontalAlignment(i, 1, HasHorizontalAlignment.ALIGN_CENTER);

                        permTable.getFlexCellFormatter().setColSpan(i, 1, 2);

                        permTable.getFlexCellFormatter().setHorizontalAlignment(i, 2, HasHorizontalAlignment.ALIGN_CENTER);

                        permTable.getFlexCellFormatter().setHorizontalAlignment(i, 3, HasHorizontalAlignment.ALIGN_CENTER);

                        i++;

                }

                for (; i < permTable.getRowCount(); i++)

                        permTable.removeRow(i);

        }

        void createDownloadLink(String[] link, FileResource file) {

                String dateString = AbstractRestCommand.getDate();

                String resource = file.getUri().substring(GSS.GSS_REST_PATH.length()-1,file.getUri().length());

                String sig = GSS.get().getCurrentUserResource().getUsername()+" "+AbstractRestCommand.calculateSig("GET", dateString, resource, AbstractRestCommand.base64decode(GSS.get().getToken()));

                link[0] = "<a class='hidden-link info' href='" + file.getUri() + "&Authorization=" + URL.encodeComponent(sig) + "&Date="+URL.encodeComponent(dateString) + "' target='_blank'>";

                link[1] = "</a>";

        }

        void removeVersion(final FileResource version) {

                ExecuteDelete df = new ExecuteDelete(version.getUri()){

                        @Override

                        public void onComplete() {

                                toRemove = version;

                                updateTable();

                                GSS.get().getFileList().updateFileCache(false, true /*clear selection*/);

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("", t);

                                if(t instanceof RestException){

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

                                        if(statusCode == 405)

                                                GSS.get().displayError("You don't have the necessary permissions");

                                        else if(statusCode == 404)

                                                GSS.get().displayError("Versions does not exist");

                                        else

                                                GSS.get().displayError("Unable to remove version:"+((RestException)t).getHttpStatusText());

                                }

                                else

                                        GSS.get().displayError("System error removing version:"+t.getMessage());

                        }

                };

                DeferredCommand.addCommand(df);

        }

        void restoreVersion(final FileResource version) {

                FileResource selectedFile = (FileResource) GSS.get().getCurrentSelection();

                ExecutePost ep = new ExecutePost(selectedFile.getUri()+"?restoreVersion="+version.getVersion(),"",200){

                        @Override

                        public void onComplete() {

                                container.hide();

                GSS.get().getFileList().updateFileCache(true, true /*clear selection*/);

                        }

                        @Override

                        public void onError(Throwable t) {

                                GWT.log("", t);

                                if(t instanceof RestException)

                                        GSS.get().displayError("Unable to restore version:"+((RestException)t).getHttpStatusText());

                                else

                                        GSS.get().displayError("System error restoring version:"+t.getMessage());

                        }

                };

                DeferredCommand.addCommand(ep);

        }

        private String formatDate(Date date){

                DateTimeFormat format = DateTimeFormat.getFormat("dd/MM/yyyy : HH:mm");

                return format.format(date);

        }

}