Synnefo » Pithos Web Client

/*

 * Copyright 2011-2012 GRNET S.A. All rights reserved.

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 * 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,

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

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

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 * 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;

import gr.grnet.pithos.web.client.FileVersionsDialog.Images;

import gr.grnet.pithos.web.client.foldertree.File;

import gr.grnet.pithos.web.client.foldertree.Version;

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

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

import java.util.List;

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

import com.google.gwt.event.dom.client.ClickEvent;

import com.google.gwt.event.dom.client.ClickHandler;

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

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

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

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

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

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

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

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

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

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

public class VersionsList extends Composite {

    Pithos app;

    File file;

    private List<Version> versions = null;

    private Images images;

    private CustomScrollPanel permPanel = new CustomScrollPanel();

    private FlexTable permTable = new FlexTable();

    FileVersionsDialog container;

        public VersionsList(Pithos _app, FileVersionsDialog aContainer, final Images theImages, File _file, List<Version> theVersions) {

        app = _app;

                images = theImages;

                container = aContainer;

                file = _file;

                versions = theVersions;

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

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

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

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

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

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

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

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

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

                permPanel.add(permTable);

                permPanel.addStyleName("pithos-versionList");

                permPanel.setSize("260px", "150px");

                permTable.addStyleName("pithos-permList");

                initWidget(permPanel);

                showVersionsTable();

        }

        public void showVersionsTable(){

                DateTimeFormat formatter = DateTimeFormat.getFormat("d/M/yyyy h:mm a");

                int i = 1;

                for (final Version v : versions) {

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

                        restoreVersion.addClickHandler(new ClickHandler() {

                                @Override

                                public void onClick(ClickEvent event) {

                                        restoreVersion(v.getVersion());

                                }

                        });

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

                        if (v.getDate() != null)

                                permTable.setHTML(i, 1, "<span>" + formatter.format(v.getDate()) + "</span>");

                        else

                                permTable.setHTML(i, 1, "<span></span>");

                        HTML downloadHtml = new HTML("<a class='hidden-link info' href='#'><span>" + AbstractImagePrototype.create(images.download()).getHTML()+"</span><div>View this Version</div></a>");

                        downloadHtml.addClickHandler(new ClickHandler() {

                                @Override

                                public void onClick(ClickEvent event) {

                                        String fileUrl = app.getApiPath() + file.getOwnerID() + file.getUri() + "?version=" + v.getVersion();

                                        Window.open(fileUrl, "_BLANK", "");

                                }

                        });

                        permTable.setWidget(i, 2, downloadHtml);

                        permTable.setWidget(i, 3, 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);

                        i++;

                }

        }

        void restoreVersion(int version) {

                String path = file.getUri() + "?update=";

                PostRequest restoreVersion = new PostRequest(app.getApiPath(), file.getOwnerID(), path) {

                        @Override

                        public void onSuccess(Resource result) {

                                container.hide();

                        }

                        @Override

                        public void onError(Throwable t) {

                                app.setError(t);

                if (t instanceof RestException) {

                        if (((RestException) t).getHttpStatusCode() == Response.SC_NO_CONTENT)

                                onSuccess(null);

                        else

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

                }

                else

                    app.displayError("System error unable to restore versions: "+t.getMessage());

                        }

                        @Override

                        protected void onUnauthorized(Response response) {

                                app.sessionExpired();

                        }

                };

                restoreVersion.setHeader("X-Auth-Token", app.getUserToken());

                restoreVersion.setHeader("X-Source-Object", URL.encodePathSegment(file.getUri()));

                restoreVersion.setHeader("X-Source-Version", String.valueOf(version));

                restoreVersion.setHeader("Content-Range", "bytes 0-/*");

                Scheduler.get().scheduleDeferred(restoreVersion);

        }

}