PreIngest.java

/**
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE file at the root of the source
 * tree and available online at
 *
 * https://github.com/keeps/roda
 */
/**
 * 
 */
package org.roda.wui.client.ingest.preingest;

import java.util.List;

import org.roda.wui.client.common.UserLogin;
import org.roda.wui.client.ingest.Ingest;
import org.roda.wui.common.client.HistoryResolver;
import org.roda.wui.common.client.tools.HistoryUtils;
import org.roda.wui.common.client.tools.ListUtils;
import org.roda.wui.common.client.widgets.HTMLWidgetWrapper;
import org.roda.wui.common.client.widgets.wcag.WCAGUtilities;

import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * @author Luis Faria
 * 
 */
public class PreIngest {

  public static final HistoryResolver RESOLVER = new HistoryResolver() {

    @Override
    public void resolve(List<String> historyTokens, AsyncCallback<Widget> callback) {
      getInstance().resolve(historyTokens, callback);
    }

    @Override
    public void isCurrentUserPermitted(AsyncCallback<Boolean> callback) {
      UserLogin.getInstance().checkRole(this, callback);
    }

    @Override
    public String getHistoryToken() {
      return "pre";
    }

    @Override
    public List<String> getHistoryPath() {
      return ListUtils.concat(Ingest.RESOLVER.getHistoryPath(), getHistoryToken());
    }
  };

  private static PreIngest instance = null;

  /**
   * Get instance
   * 
   * @return {@link PreIngest} singleton
   */
  public static PreIngest getInstance() {
    if (instance == null) {
      instance = new PreIngest();
    }
    return instance;
  }

  private VerticalPanel layout;
  private HTMLWidgetWrapper html;

  private PreIngest() {
    layout = new VerticalPanel();
    html = new HTMLWidgetWrapper("PreIngest.html");
    layout.add(html);
    layout.addStyleName("wui-ingest-pre");
    WCAGUtilities.getInstance().makeAccessible(layout.getElement());
  }

  public void resolve(List<String> historyTokens, AsyncCallback<Widget> callback) {
    if (historyTokens.isEmpty()) {
      callback.onSuccess(layout);
    } else {
      HistoryUtils.newHistory(RESOLVER);
      callback.onSuccess(null);
    }
  }

}