src/main/java/eu/svjatoslav/commons/network/navigation/Navigation.java

   1 /*
   2  * Svjatoslav Commons - shared library of common functionality.
   3  * Copyright ©2012-2014, Svjatoslav Agejenko, svjatoslav@svjatoslav.eu
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 3 of the GNU Lesser General Public License
   7  * or later as published by the Free Software Foundation.
   8  */
   9
  10 package eu.svjatoslav.commons.network.navigation;
  11
  12 import java.net.MalformedURLException;
  13 import java.net.URL;
  14
  15 import javax.servlet.http.HttpServletRequest;
  16
  17 public class Navigation {
  18
  19         private NavigationItem rootNavigationItem;
  20
  21         private NavigationItem defaultNavigationItem;
  22
  23         public NavigationItem getDefaultNavigationItem() {
  24                 return defaultNavigationItem;
  25         }
  26
  27         public NavigationItem getRootNavigationItem() {
  28                 return rootNavigationItem;
  29         }
  30
  31         public NavigationItem getSelectedItem(final HttpServletRequest request) {
  32                 final String requestUrl = request.getRequestURL().toString();
  33
  34                 try {
  35                         final String requestPath = new URL(requestUrl).getPath();
  36
  37                         final NavigationItem match = rootNavigationItem
  38                                         .getMatchingNavigationItem(requestPath);
  39
  40                         if (match != null)
  41                                 return match;
  42                 } catch (final MalformedURLException e) {
  43                         System.out.println("Cannot handle URL: " + requestUrl);
  44                         e.printStackTrace();
  45                 }
  46
  47                 return getDefaultNavigationItem();
  48         }
  49
  50         public String getTopMenu(final HttpServletRequest request) {
  51
  52                 final NavigationItem selectedItem = getSelectedItem(request);
  53                 final StringBuffer result = new StringBuffer();
  54
  55                 result.append("<div class=\"navigationMenu\">");
  56
  57                 for (final NavigationItem item : getRootNavigationItem()
  58                                 .getSubElements()) {
  59
  60                         if (item == selectedItem)
  61                                 result.append("<a class=\"menuItemSelected\" href=\""
  62                                                 + item.getLinkUrl() + "\">");
  63                         else
  64                                 result.append("<a class=\"menuItem\" href=\""
  65                                                 + item.getLinkUrl() + "\">");
  66
  67                         result.append("<div>" + item.getTitle() + "</div>");
  68                         result.append("</a>");
  69                 }
  70
  71                 result.append("</div>");
  72
  73                 return result.toString();
  74         }
  75
  76         public NavigationItem setDefaultNavigationItem(
  77                         final NavigationItem defaultNavigationItem) {
  78                 this.defaultNavigationItem = defaultNavigationItem;
  79                 return defaultNavigationItem;
  80         }
  81
  82         public NavigationItem setRootNavigationItem(
  83                         final NavigationItem rootNavigationItem) {
  84                 this.rootNavigationItem = rootNavigationItem;
  85                 return rootNavigationItem;
  86         }
  87
  88 }