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 import eu.svjatoslav.commons.network.Locale;
  18 import eu.svjatoslav.commons.network.LocaleHelper;
  19
  20 public class Navigation {
  21
  22         private NavigationItem rootNavigationItem;
  23
  24         private NavigationItem defaultNavigationItem;
  25
  26         public NavigationItem getDefaultNavigationItem() {
  27                 return defaultNavigationItem;
  28         }
  29
  30         private String getGetNotNullString(final String string) {
  31                 if (string != null)
  32                         return string;
  33
  34                 return "";
  35         }
  36
  37         public NavigationItem getRootNavigationItem() {
  38                 return rootNavigationItem;
  39         }
  40
  41         public NavigationItem getSelectedItem(final HttpServletRequest request) {
  42                 final String requestUrl = request.getRequestURL().toString();
  43
  44                 try {
  45                         final String requestPath = new URL(requestUrl).getPath();
  46
  47                         final NavigationItem match = rootNavigationItem
  48                                         .getMatchingNavigationItem(requestPath);
  49
  50                         if (match != null)
  51                                 return match;
  52                 } catch (final MalformedURLException e) {
  53                         System.out.println("Cannot handle URL: " + requestUrl);
  54                         e.printStackTrace();
  55                 }
  56
  57                 return getDefaultNavigationItem();
  58         }
  59
  60         public String getTopMenu(final HttpServletRequest request) {
  61
  62                 final Locale currentLocale = LocaleHelper.detectLocale(request);
  63
  64                 final NavigationItem selectedItem = getSelectedItem(request);
  65                 final StringBuffer result = new StringBuffer();
  66
  67                 result.append("<div class=\""
  68                                 + getGetNotNullString(rootNavigationItem.getCssPrefix())
  69                                 + "navigationMenu\">");
  70
  71                 for (final NavigationItem item : getRootNavigationItem()
  72                                 .getSubElements()) {
  73
  74                         if (item == selectedItem)
  75                                 result.append("<a class=\""
  76                                                 + getGetNotNullString(item.getCssPrefix())
  77                                                 + "menuItemSelected\" href=\"" + item.getLinkUrl()
  78                                                 + "\">");
  79                         else
  80                                 result.append("<a class=\""
  81                                                 + getGetNotNullString(item.getCssPrefix())
  82                                                 + "menuItem\" href=\"" + item.getLinkUrl() + "\">");
  83
  84                         result.append("<div>" + item.getTitle(currentLocale) + "</div>");
  85                         result.append("</a>");
  86                 }
  87
  88                 result.append("</div>");
  89
  90                 return result.toString();
  91         }
  92
  93         public NavigationItem setDefaultNavigationItem(
  94                         final NavigationItem defaultNavigationItem) {
  95                 this.defaultNavigationItem = defaultNavigationItem;
  96                 return defaultNavigationItem;
  97         }
  98
  99         public NavigationItem setRootNavigationItem(
 100                         final NavigationItem rootNavigationItem) {
 101                 this.rootNavigationItem = rootNavigationItem;
 102                 return rootNavigationItem;
 103         }
 104
 105 }