BasePage.java

/**
 * vlove - web based virtual machine management
 * Copyright (C) 2010 Limone Fresco Limited
 * 
 * This program 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 2
 * of the License, or (at your option) any later version.
 * 
 * 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package vlove.web;

import java.util.Arrays;

import org.apache.wicket.Page;
import org.apache.wicket.ajax.WicketAjaxReference;
import org.apache.wicket.behavior.AttributeAppender;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.WebPage;
import org.apache.wicket.markup.html.WicketEventReference;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;
import org.apache.wicket.markup.html.panel.Fragment;
import org.apache.wicket.model.Model;
import org.apache.wicket.spring.injection.annot.SpringBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import vlove.service.VirtManager;
import vlove.web.agent.AgentPage;
import vlove.web.config.ConfigPage;
import vlove.web.storage.ListStoragePoolsPage;
import vlove.web.vms.VmListPage;

/**
 * The root page that all pages extend - defines our magic template.
 * 
 * @author Michael Laccetti
 */
public abstract class BasePage extends WebPage {
  static final Logger log = LoggerFactory.getLogger(BasePage.class);

  @SpringBean
  VirtManager  vm;

  private enum Links {
    HOME("home", HomePage.class), AGENTS("agents", AgentPage.class), VMS("vms", VmListPage.class), STORAGE("storage", ListStoragePoolsPage.class), CONFIG("config", ConfigPage.class);

    private String                    name;
    private Class<? extends BasePage> impl;

    private Links(String name, Class<? extends BasePage> impl) {
      this.name = name;
      this.impl = impl;
    }

    public String getName() {
      return name;
    }

    public Class<? extends BasePage> getImpl() {
      return impl;
    }
  }

  private static final Links[] links = new Links[] { Links.HOME, Links.AGENTS, Links.VMS, Links.STORAGE, Links.CONFIG };

  public BasePage() {
    WebMarkupContainer missingConfig = null;
    final boolean isConfigPage = this instanceof ConfigPage;
    if (!vm.validateConfig() && !isConfigPage) {
      log.debug("Injecting diaglog redirect.");
      missingConfig = new Fragment("config", "missingConfig", this);
      missingConfig.add(new BookmarkablePageLink<>("configPageLink", ConfigPage.class));
    } else {
      // log.debug("Config is okay/we're the config page, keeping things blank");
      missingConfig = new WebMarkupContainer("config");
      missingConfig.setVisible(false);
    }
    add(missingConfig);

    ListView<Links> menu = new ListView<Links>("menu", Arrays.asList(links)) {
      @Override
      protected void populateItem(ListItem<Links> item) {
        final Class<? extends Page> currentPage = getPage().getClass();

        final WebMarkupContainer listItem = new WebMarkupContainer("item");
        if (currentPage.equals(item.getModelObject().getImpl())) {
          listItem.add(new AttributeAppender("class", new Model<>("active"), " "));
        }
        item.add(listItem);

        final BookmarkablePageLink<Object> link = new BookmarkablePageLink<>("link", item.getModelObject().getImpl());
        link.add(new Label("name", item.getModelObject().getName()));
        listItem.add(link);
      }
    };
    add(menu);
  }

  @Override
  public void renderHead(IHeaderResponse response) {
    response.renderJavaScriptReference(WicketAjaxReference.INSTANCE);
    response.renderJavaScriptReference(WicketEventReference.INSTANCE);
  }
}