org.pentaho.mantle.client.commands.AboutCommand.java Source code

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Here is the source code for org.pentaho.mantle.client.commands.AboutCommand.java

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/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.mantle.client.commands;

import com.google.gwt.core.client.GWT;
import com.google.gwt.http.client.Request;
import com.google.gwt.http.client.RequestBuilder;
import com.google.gwt.http.client.RequestCallback;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import org.pentaho.gwt.widgets.client.dialogs.PromptDialogBox;
import org.pentaho.gwt.widgets.client.utils.string.StringUtils;
import org.pentaho.mantle.client.MantleApplication;
import org.pentaho.mantle.client.messages.Messages;

import java.util.Date;

public class AboutCommand extends AbstractCommand {

    public AboutCommand() {
    }

    protected void performOperation() {
        performOperation(true);
    }

    protected void performOperation(boolean feedback) {
        if (StringUtils.isEmpty(MantleApplication.mantleRevisionOverride) == false) {
            showAboutDialog(MantleApplication.mantleRevisionOverride);
        } else {
            final String url = GWT.getHostPageBaseURL() + "api/version/show"; //$NON-NLS-1$
            RequestBuilder requestBuilder = new RequestBuilder(RequestBuilder.GET, url);
            requestBuilder.setHeader("If-Modified-Since", "01 Jan 1970 00:00:00 GMT");
            requestBuilder.setHeader("accept", "text/plain");
            try {
                requestBuilder.sendRequest(null, new RequestCallback() {

                    public void onError(Request request, Throwable exception) {
                        // showError(exception);
                    }

                    public void onResponseReceived(Request request, Response response) {
                        showAboutDialog(response.getText());
                    }
                });
            } catch (RequestException e) {
                Window.alert(e.getMessage());
                // showError(e);
            }
        }
    }

    private void showAboutDialog(String version) {
        @SuppressWarnings("deprecation")
        String licenseInfo = Messages.getString("licenseInfo", "" + ((new Date()).getYear() + 1900));
        String releaseLabel = Messages.getString("release");
        PromptDialogBox dialogBox = new PromptDialogBox(Messages.getString("aboutDialogTitle"), //$NON-NLS-1$
                Messages.getString("ok"), null, false, true);

        VerticalPanel aboutContent = new VerticalPanel();
        aboutContent.add(new Label(releaseLabel + " " + version));
        aboutContent.add(new HTML(licenseInfo));

        dialogBox.setContent(aboutContent);
        dialogBox.center();
    }
}