SchedulesPerspectivePanel.java example

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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.workspace;

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.resources.client.ImageResource;
import com.google.gwt.user.cellview.client.CellTable;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.VerticalPanel;
import org.pentaho.mantle.client.messages.Messages;

public class SchedulesPerspectivePanel extends SimplePanel {
  static final int PAGE_SIZE = 25;
  private static SchedulesPerspectivePanel instance = new SchedulesPerspectivePanel();

  private VerticalPanel wrapperPanel;
  private SchedulesPanel schedulesPanel;
  private BlockoutPanel blockoutPanel;

  private boolean isScheduler;
  private boolean isAdmin;

  public static SchedulesPerspectivePanel getInstance() {
    return instance;
  }

  public SchedulesPerspectivePanel() {
    try {
      final String url = GWT.getHostPageBaseURL() + "api/repo/files/canAdminister"; //$NON-NLS-1$
      RequestBuilder requestBuilder = new RequestBuilder( RequestBuilder.GET, url );
      requestBuilder.setHeader( "accept", "text/plain" ); //$NON-NLS-1$ //$NON-NLS-2$
      requestBuilder.setHeader( "If-Modified-Since", "01 Jan 1970 00:00:00 GMT" ); //$NON-NLS-1$ //$NON-NLS-2$
      requestBuilder.sendRequest( null, new RequestCallback() {

        public void onError( Request request, Throwable caught ) {
          isAdmin = false;
          isScheduler = false;
        }

        public void onResponseReceived( Request request, Response response ) {
          isAdmin = "true".equalsIgnoreCase( response.getText() ); //$NON-NLS-1$

          try {
            final String url2 = GWT.getHostPageBaseURL() + "api/scheduler/canSchedule"; //$NON-NLS-1$
            RequestBuilder requestBuilder2 = new RequestBuilder( RequestBuilder.GET, url2 );
            requestBuilder2.setHeader( "accept", "text/plain" ); //$NON-NLS-1$ //$NON-NLS-2$
            requestBuilder2.setHeader( "If-Modified-Since", "01 Jan 1970 00:00:00 GMT" );
            requestBuilder2.sendRequest( null, new RequestCallback() {

              public void onError( Request request, Throwable caught ) {
                isScheduler = false;
                createUI();

              }

              public void onResponseReceived( Request request, Response response ) {
                isScheduler = "true".equalsIgnoreCase( response.getText() ); //$NON-NLS-1$
                createUI();
              }

            } );
          } catch ( RequestException e ) {
            Window.alert( e.getMessage() );
          }
        }
      } );
    } catch ( RequestException e ) {
      Window.alert( e.getMessage() );
    }

  }

  private void createUI() {

    this.setStyleName( "schedulerPerspective" ); //$NON-NLS-1$

    wrapperPanel = new VerticalPanel();

    String schedulesLabelStr = Messages.getString( "mySchedules" ); //$NON-NLS-1$
    if ( isAdmin ) {
      schedulesLabelStr = Messages.getString( "manageSchedules" ); //$NON-NLS-1$
    }

    Label schedulesLabel = new Label( schedulesLabelStr );
    schedulesLabel.setStyleName( "workspaceHeading" ); //$NON-NLS-1$
    wrapperPanel.add( schedulesLabel );

    schedulesPanel = new SchedulesPanel( isAdmin, isScheduler );
    schedulesPanel.setStyleName( "schedulesPanel" ); //$NON-NLS-1$
    schedulesPanel.addStyleName( "schedules-panel-wrapper" ); //$NON-NLS-1$
    wrapperPanel.add( schedulesPanel );

    blockoutPanel = new BlockoutPanel( isAdmin );
    blockoutPanel.setStyleName( "schedulesPanel" ); //$NON-NLS-1$
    blockoutPanel.addStyleName( "blockout-schedules-panel-wrapper" ); //$NON-NLS-1$
    wrapperPanel.add( blockoutPanel );

    SimplePanel sPanel = new SimplePanel();
    sPanel.add( wrapperPanel );
    sPanel.setStylePrimaryName( "schedulerPerspective-wrapper" ); //$NON-NLS-1$
    add( sPanel );

  }

  public void refresh() {
    schedulesPanel.refresh();
    blockoutPanel.refresh();
  }

  public interface CellTableResources extends CellTable.Resources {
    @Override
    public ImageResource cellTableSortAscending();

    @Override
    public ImageResource cellTableSortDescending();

    /**
     * The styles used in this widget.
     */
    @Source( "org/pentaho/mantle/client/workspace/CellTable.css" )
    public CellTable.Style cellTableStyle();
  }
}