/**
    * This file Copyright (c) 2012-2013 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.framework.app.embedded;
  
  import info.magnolia.context.MgnlContext;
  import info.magnolia.ui.api.app.SubAppContext;
  import info.magnolia.ui.api.location.Location;
  import info.magnolia.ui.api.view.View;
  import info.magnolia.ui.framework.app.BaseSubApp;
  
  import javax.inject.Inject;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * Sub app for the main tab in an embedded page app.
   */
  public class EmbeddedPageSubApp extends BaseSubApp {
  
      private static final Logger log = LoggerFactory.getLogger(EmbeddedPageSubApp.class);
      private Location lastLocation;
  
      @Inject
      public EmbeddedPageSubApp(SubAppContext subAppContext, EmbeddedPageView pageView) {
          super(subAppContext, pageView);
      }
  
      @Override
      public View start(Location location) {
          this.lastLocation = location;
          String url = location.getParameter();
          if (StringUtils.isEmpty(url)) {
              EmbeddedPageSubAppDescriptor subAppDescriptor = ((EmbeddedPageSubAppDescriptor) getSubAppContext().getSubAppDescriptor());
              url = subAppDescriptor.getUrl();
          }
  
          url = updateUrl(url);
          getView().setUrl(url);
          return super.start(location);
      }
  
      /**
       * Check whether the url has changed, if so update the view to display the new location.
       */
      @Override
      public void locationChanged(Location location) {
          String url = location.getParameter();
          if (StringUtils.isNotBlank(url) && !url.equals(lastLocation.getParameter())) {
              getView().setUrl(updateUrl(url));
          }
          this.lastLocation = location;
          super.locationChanged(location);
      }
  
      @Override
      public EmbeddedPageView getView() {
          return (EmbeddedPageView) super.getView();
      }
  
      /**
       * Add the context path to internal urls.
       */
      private String updateUrl(String url) {
          boolean isInternalPage = !url.startsWith("http");
  
         if(isInternalPage) {
             url = url.startsWith("/") ? MgnlContext.getContextPath() + url : MgnlContext.getContextPath() + "/" + url;
         }
         return url;
     }
 }