taglibs-rdc-examples/src/main/java/org/apache/taglibs/rdc/sampleapps/musicstore/HTMLMenuLinks.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.taglibs.rdc.sampleapps.musicstore;

import java.util.Locale;
import java.util.List;
import java.util.ResourceBundle;
import java.util.Enumeration;
import java.util.ArrayList;
import java.text.MessageFormat;
import org.apache.taglibs.rdc.sampleapps.musicstore.ws.MusicAlbum;

/**
 * Implements a simple HTML Menu Generator JavaBean
 * @author Thomas Ling
 *
 */
public class HTMLMenuLinks {

    static public String MAINMENU_CATEGORY = "mainmenu.category.";
    static public String MAINMENU_GENRE    = "mainmenu.genre.";
    static public String DEFAULT_GENRE     = "301668";
    static public String MUSICSTORE_PATH   = "/musicstore-app";
    
    protected ResourceBundle menuRes = null;
    private String baseURL = null;
    private String links = "";
    private List categoryKeys = new ArrayList();
    private List genreKeys = new ArrayList();
    
     
    public HTMLMenuLinks(String aURL) {
        menuRes = ResourceBundle.getBundle(
            "org.apache.taglibs.rdc.sampleapps.musicstore.resources.MusicStoreMenu", Locale.US);

        baseURL = aURL;
        Enumeration keys = menuRes.getKeys();
        
        while (keys.hasMoreElements()) {
            String akey = (String)keys.nextElement();
            String id = akey.substring(akey.lastIndexOf('.') + 1);
            
            if (akey.startsWith(MAINMENU_CATEGORY)) {
                categoryKeys.add(id);
            } else if (akey.startsWith(MAINMENU_GENRE)) {
                genreKeys.add(id);
            }
        }
    }

    /**
     * Sets the value of the hints property.
     * @param aHints the new value of the hints property
     */
    public void generateGenreLinks() {
        links ="";
        
        for (int i = 0; i < genreKeys.size(); i++) {
            String key = (String)genreKeys.get(i);
            String linkURL = baseURL;
            String text    = menuRes.getString(MAINMENU_GENRE + key);
            
            linkURL += MUSICSTORE_PATH + "/mainmenu_gui.do?genre=" + key;
            links += buildLinkNL(linkURL, text);
        }
    }
    
    public void generateCategoryLinks(String genre, boolean bBrowse) {
        links = "";
        
        for (int i = 0; i < categoryKeys.size(); i++) {
            String key = (String)categoryKeys.get(i);
            String linkURL = baseURL;
            String text    = menuRes.getString(MAINMENU_CATEGORY + key);
            
            if (key.equals("0")) {
                if (bBrowse) {
                    linkURL += MUSICSTORE_PATH + "/mainmenu_gui.do?browseMusic=1";
                    links += buildLinkNL(linkURL, text);
                }
            } else {
                linkURL += "/listalbums_gui.do?category=" + key + "&genre=" + genre;
                links += buildLinkNL(linkURL, text);
            }
        }
    }

    public void generateAlbumLinks(MusicAlbum[] albums) {
        links = "";
        
        for (int i = 0; i < albums.length; i++) {
            MusicAlbum album = albums[i]; 
            String linkURL = baseURL + "/reviewalbum_gui.do?asin=" + album.getASIN();
            String text = album.getTitle() + ", " + album.getArtist();
            links += buildLinkNL(linkURL, text);
        }
    }
    
    public String getLinks() {
        return links;
    }
    
    public String getHomeLink() {
        String linkURL = baseURL + MUSICSTORE_PATH + "/mainmenu_gui.do"; 
        return buildLink(linkURL, "Home");
    }

    public String getCartLink() {
        String linkURL = baseURL + "/viewcart_gui.do"; 
        return buildLink(linkURL, "View Cart");
    }
    public String getHelpLink() {
        String linkURL = baseURL + "/help_gui.do"; 
        return buildLink(linkURL, "About");
    }
    
    private String buildLinkNL(String link, String text) {
        return buildLink(link, text) + "<br/>";
    }
    
    private String buildLink(String link, String text) {
        MessageFormat format = 
            new MessageFormat("<a href=\"{0}\">{1}</a>\n");
        Object[] args = {link, text};
        return format.format(args);
    }
        
}