Navigation.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) 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.
 *
 * OpenNMS(R) 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 OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *******************************************************************************/

package org.opennms.ipv6.summary.gui.client;

import java.util.List;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.event.shared.HasHandlers;
import com.google.gwt.event.shared.SimpleEventBus;
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.http.client.URL;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Anchor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.RadioButton;
import com.google.gwt.user.client.ui.Widget;

public class Navigation extends Composite implements HasHandlers {
    
    private static NavigationUiBinder uiBinder = GWT.create(NavigationUiBinder.class);
    
    private EventBus m_handlerManager;

    @UiField
    RadioButton m_allLocations;
    
    @UiField
    RadioButton m_singleLocation;
    
    @UiField
    ListBox m_locationList;
    
    @UiField
    RadioButton m_allHosts;
    
    @UiField
    RadioButton m_singleHost;
    
    @UiField
    ListBox m_hostList;
    
    @UiField
    Anchor m_link;
    
    interface NavigationUiBinder extends UiBinder<Widget, Navigation> {
    }

    public Navigation() {
        initWidget(uiBinder.createAndBindUi(this));
        m_handlerManager = new SimpleEventBus();
        m_allHosts.setValue(true);
        m_allHosts.setVisible(false);
        m_singleHost.setVisible(false);
        m_hostList.setVisible(false);
        
        m_allLocations.setValue(true);
        m_allLocations.setVisible(false);
        m_singleLocation.setVisible(false);
        m_locationList.setVisible(false);
    }

    @Override
    public void fireEvent(GwtEvent<?> event) {
        m_handlerManager.fireEvent(event);
    }
    
    public HandlerRegistration addLocationUpdateEventHandler(LocationUpdateEventHandler handler) {
        return m_handlerManager.addHandler(LocationUpdateEvent.TYPE, handler);
    }
    
    public HandlerRegistration addHostUpdateEventHandler(HostUpdateEventHandler handler) {
        return m_handlerManager.addHandler(HostUpdateEvent.TYPE, handler);
    }
    
    @UiHandler("m_allLocations")
    public void allLocationsClick(ClickEvent event) {
        hideLocationSelection();
        fireEvent(new LocationUpdateEvent("All"));
    }
    
    @UiHandler("m_singleLocation")
    public void singleLocationClick(ClickEvent event) {
        showLocationSelection();
        fireEvent(new LocationUpdateEvent(m_locationList.getItemText(m_locationList.getSelectedIndex())));
    }
    
    
    @UiHandler("m_locationList")
    public void locationListClick(ClickEvent event) {
        fireEvent(new LocationUpdateEvent(m_locationList.getItemText(m_locationList.getSelectedIndex())));
    }
    
    @UiHandler("m_allHosts")
    public void allHostsClick(ClickEvent event) {
        hideHostSelection();
        fireEvent(new HostUpdateEvent("All"));
    }
    
    

    @UiHandler("m_singleHost")
    public void singleHostClick(ClickEvent event) {
        showHostSelection();
        fireEvent(new HostUpdateEvent(m_hostList.getItemText(m_hostList.getSelectedIndex())));
    }
    
    @UiHandler("m_hostList")
    public void hostListClick(ClickEvent event) {
        fireEvent(new HostUpdateEvent(m_hostList.getItemText(m_hostList.getSelectedIndex())));
    }
    
    @UiHandler("m_link")
    public void linkTopOpenNMSClicked(ClickEvent event) {
        StringBuffer postData = new StringBuffer();
        // note param pairs are separated by a '&' 
        // and each key-value pair is separated by a '='
        postData.append(URL.encode("j_username")).append("=").append(URL.encode("ipv6"));
        postData.append("&");
        postData.append(URL.encode("j_password")).append("=").append(URL.encode("ipv6"));
        postData.append("&");
        postData.append(URL.encode("Login")).append("=").append(URL.encode("login"));
        
        RequestBuilder builder = new RequestBuilder(RequestBuilder.POST, URL.encode("/opennms/j_spring_security_check"));
        builder.setHeader("Content-type", "application/x-www-form-urlencoded");
        try {
            builder.sendRequest(postData.toString(), new RequestCallback() {

                @Override
                public void onResponseReceived(Request request, Response response) {
                    if(response.getStatusCode() == 200) {
                        Window.open("/opennms/index.jsp", "_target", null);
                    }else {
                        Window.alert("Failed to login");
                    }
                }

                @Override
                public void onError(Request request, Throwable exception) {
                    Window.alert("Problem Logging in");
                }
            });
        } catch (RequestException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        //Window.alert("Cliking link to OpenNMS");
    }
    
    public void loadLocations(List<String> locations) {
        m_locationList.clear();
        for(String location : locations) {
            m_locationList.addItem(location);
        }
    }
    
    public void loadHosts(List<String> hosts) {
        m_hostList.clear();
        for(String host : hosts) {
            m_hostList.addItem(host);
        }
    }
    
    private void showHostSelection() {
        m_hostList.setVisible(true);
    }

    private void hideLocationSelection() {
        m_locationList.setVisible(false);
    }
    
    private void showLocationSelection() {
        m_locationList.setVisible(true);
    }
    
    private void hideHostSelection() {
        m_hostList.setVisible(false);
    }

}